STATIONARY BLADE, BLADES SET, METHOD FOR THE MANUFACTURING OF A STATIONARY BLADE COMPOSED OF METAL A

专利摘要:
stationary blade, set of blades, method for manufacturing a stationary blade composed of metal and plastic, and method for manufacturing a set of blades. the present disclosure relates to a hair cutting apparatus (10), a blade assembly (20) for a hair cutting apparatus (10) and a stationary blade (22) for said blade assembly (20 ). said stationary blade (22) may comprise a first wall portion (100) arranged to serve as a skin-facing wall when in operation, a second wall portion (102) at least partially displaced from the first wall portion. (100), so that the first wall portion (100) and the second wall portion (102) define between them a guide slot (96) arranged to receive a movable cutter blade (24), at least one leading edge toothed (30) formed together by the first wall portion (100) and the second wall portion (102), wherein the at least one toothed leading edge (30) comprises a plurality of teeth (36) wherein the first wall portion (100) and the second wall portion (102) are connected at a front end of the at least one leading edge (30), thus forming tips (86) of the teeth (36) in which the stationary blade (22) is an integrally composite metal and plastic stationary blade. formed (22), wherein the first wall portion (100) is at least partially produced from metallic material, and wherein the second wall portion (102) is at least partially produced from the material. plastic. the disclosure further relates to a method for manufacturing a respective blade (22).
公开号:BR112016023790B1
申请号:R112016023790-0
申请日:2015-04-08
公开日:2021-06-22
发明作者:Siegfried Sablatschan
申请人:Koninklijke Philips N.V.；
IPC主号:

专利说明:

field of invention
[001] The present disclosure relates to an apparatus for hair cutting, particularly, to an electrically operated hair cutting apparatus, and more particularly, to a stationary blade of the set of blades for such apparatus. The blade assembly can be arranged to be moved through the hairs in a direction of movement to cut hairs. The stationary blade can be composed of a first wall portion and a second wall portion defining therebetween a guide slot, where a movable cutter blade can be at least partially covered and guided. The present disclosure further relates to a method for manufacturing a stationary blade of a blade assembly for a hair cutting apparatus. Background of the invention
[002] The document under the no. WO 2013/150412 A1 discloses a hair cutting apparatus and a corresponding blade set of a hair cutting apparatus. The blade assembly comprises a stationary blade and a mobile blade, the mobile blade being reciprocally driven with respect to the stationary blade to cut hair. The set of blades is particularly suitable for enabling both trimming and shaving or waxing operations.
[003] For the purpose of cutting body hair, there are basically two types of electrically powered appliances usually distinguishable: the electric shaving or shaving appliance, and the hair trimmer or clipper. In general, the electric razor or epilator is used for shaving or waxing, that is, cutting body hair at skin level in order to obtain smooth skin without bristly hairs. The hair trimmer is normally used to cut the hair at a chosen distance from the skin, that is, to cut the hair to a desired length. The difference in application is reflected in the different structure and architectures of the cutting blade arrangement implemented in any apparatus.
[004] An electric shaving or waxing apparatus typically includes a sheet, i.e. an ultra-thin perforated screen, and a cutter blade that is movable along the interior of and with respect to the sheet. During use, the outside of the sheet is placed and pushed against the skin, so that any hair that penetrates the sheet is cut by the cutter blade that moves relative to the inside of the sheet, and falls into the hollow hair-collecting portions of the sheet. inside the appliance for shaving or epilating.
[005] An electric hair trimmer, on the other hand usually includes, in general, two cutter blades having a serrated edge, one placed on top of the other so that the respective serrated edges overlap. In operation, the cutter blades reciprocate with respect to each other, cutting any hairs that are trapped between their teeth in a scissors action. The exact level above the skin at which the hair is cut is usually determined by means of an additional attachable part called a protector (spacer) or comb.
[006] Additionally, combined devices are known which are basically adapted for both shaving or waxing and trimming purposes. However, these devices merely include two separate and distinct cutting sections, namely, a shaving or epilating section comprising an assembly that corresponds to the concept of electric razors or epilators as set out above, and a trimming section comprising an assembly which, on the other hand, corresponds to the concept of fur trimmers.
[007] Ordinary electric shaving or epilating devices are not particularly suitable for cutting hair to a desired variable length above the skin, ie for precise trimming operations. This can be explained, at least in part, by the fact that they do not include mechanisms for spacing the sheet and, consequently, the skin cutting blade. However, even if they included, for example, by the addition of spacer fastening parts such as spacing combs, the sheet configuration, which normally involves a large number of small perforations, would decrease the efficient capture of almost all the shorter and longer hairs. hard.
[008] Similarly, common hair trimmers are not particularly suitable for shaving or waxing, mainly because the separate cutter blades require a certain rigidity, and therefore thickness, to perform the scissors action without deformation. It is the minimum blade thickness required of a skin facing blade that prevents hair from being cut close to the skin. Consequently, a user who wants to either shave or shave or trim their body hair may need to purchase and use two separate appliances.
[009] Additionally, combined shaving or waxing and trimming devices show several disadvantages, as they basically require two sets of cutting blades and respective drive mechanisms. As a result, these devices are heavier and more susceptible to wear and tear than standard single-function hair trimmers, and they also require expensive assembly and manufacturing processes. Similarly, the operation of these combined devices is often considered to be quite uncomfortable and complex. Even in case a conventional combined shaving or waxing and trimming device is used, which comprises two separate cutting sections, handling the device and switching between different modes of operation can be considered to be time consuming and not very user-friendly. Since the cut sections are normally provided at different locations on the device, the guidance accuracy (and therefore also the cutting accuracy) can be reduced as the user needs to get used to two distinct, dominant holding positions, during operation.
[010] The document under no. WO 2013/150412 A1 above solves some of these problems by providing a set of blades comprising a stationary blade that houses the movable blade so that a first portion of the stationary blade is disposed on the side of the blade. mobile blade facing the skin when used for shaving or waxing, and that a second portion of the stationary blade is disposed on the side of the mobile blade facing away from the skin when in use. Additionally, in a serrated cutting edge, the first portion and the second portion of the stationary blade are connected, thus forming a plurality of stationary teeth that cover the respective teeth of the movable blade. Consequently, the movable blade is countered by the stationary blade.
[011] This arrangement is advantageous in that the stationary blade can provide the set of blades with increased strength and stiffness, since the stationary blade is also present on the side of the mobile blade facing away from the skin. This can generally enable a reduction in the thickness of the first portion of the stationary blade on the skin-facing side of the movable blade. Consequently, since in this way the movable blade can be closer to the skin during the operation, the set of blades above is well suited for shaving or hair removal operations. Furthermore, the set of blades is also particularly suitable for hair trimming operations, since the configuration of the cutting edge, including the respective teeth alternating with slots, also allows longer hairs to enter the slots and, consequently, be cut by relative cutting movement between the movable blade and the stationary blade.
[012] However, there is still a need for improvement in devices for cutting hair and respective sets of blades. This can particularly involve aspects related to user comfort, aspects related to performance and aspects related to manufacturing. Manufacturing-related aspects may involve suitability for series production or mass production. Invention Summary
[013] It is an object of the present disclosure to provide an alternative stationary cutter blade and a corresponding set of blades that enable both shaving or waxing and trimming. In particular, a stationary blade and a set of blades can be provided which contribute to a pleasant user experience in both shaving or waxing and trimming operations. More preferably, the present disclosure can address at least some disadvantages inherent in known prior art hair cutter blades, as discussed above, for example. It would be additionally advantageous to provide a blade assembly that can exhibit improved operating performance, while preferably reducing the time required for cutting operations. It is additionally preferred to provide a corresponding method for manufacturing such a stationary blade. It is particularly desired to provide a manufacturing method which enables the production of blade assemblies, and particularly stationary blades, in a cost-effective manner and with adequate process capability.
[014] According to a first aspect of the present disclosure, a stationary blade is presented for a set of blades of a hair-cutting apparatus, said set of blades being arranged to be moved through the hairs in a direction of movement to cut the hairs, and said stationary blade comprises: - a first wall portion arranged to serve as a skin-facing wall when in operation, - a second wall portion at least partially displaced from the first wall portion , so that the first wall portion and the second wall portion define between them a guide slot arranged to receive a movable cutter blade, - at least one toothed leading edge formed together by the first wall portion and the second wall portion, the toothed leading edge comprising a plurality of teeth, the first wall portion and the second wall portion being connected at one end. the front edge of the anterior edge, thus forming the tips of the teeth, the stationary blade being an integrally formed composite stationary blade of metal and plastic, the first wall portion being, at least partially, produced from metallic material, and the second wall portion being at least partially produced from plastic material.
[015] This aspect is based on the understanding that the first portion of the wall that can be in close contact with the skin and that is basically configured to cooperate with a mobile cutting blade to cut hair, preferably, exhibit properties of stiffness and strength. considerable. The first wall portion is at least partially produced from metallic material, particularly from steel material, such as stainless steel, for example. Consequently, even though the first wall portion is preferably considerably thin-walled in order to enable the cutting of hairs close to the skin, it can provide adequate strength. Additionally, the second wall portion may be added on the side typically facing away from the skin to further strengthen the stationary blade. Preferably, the stationary blade can be obtained from a combined manufacturing process which involves forming the plastic material and joining the plastic material to the metallic material basically at the same time. It is particularly preferred that the stationary blade consists of the first wall portion and the second wall portion, i.e. no additional essential components need to be mounted thereto to realize the stationary blade. In general, the stationary blade can be thought of as a two-component part in which the two components are integrally and fixedly interconnected.
[016] In one embodiment, the stationary blade comprises a metal component, particularly a sheet metal insert, and a plastic component joined to the metal component, whereby at least a central portion of the first wall portion is formed by the metal component. This can have the advantage that the metal component can be particularly thin, which can make it possible to cut hair very close to a user's skin. Consequently, shaving or hair removal performance can be improved.
[017] In one embodiment, the metal component further comprises tooth shank portions comprising cutting edges that are configured to cooperate with the cutting edges of respective teeth of the movable cutter blade to cut by those that are held therebetween, when in operation. Therefore, the cutting edges in the first wall portion can be formed in the metal component in the tooth shank portions thereof.
[018] In one embodiment, the metal component comprises at least one anchoring element, particularly at least one positive fit anchoring element extending from a respective portion of tooth shank, wherein the plastic component and the metal component are connected to at least one anchoring element. The at least one anchoring element can provide a locking geometry that can be engaged by or filled with the plastic material of the plastic component. In general, the at least one anchoring element may protrude longitudinally from the front ends of the tine shank portions.
[019] In one embodiment, the at least one anchoring element is inclined relative to a top surface of the first wall portion, particularly flexed backwards. In one embodiment, the at least one anchoring element is T-shaped, U-shaped or O-shaped, particularly when viewed from the top. In one embodiment, the at least one anchoring element is displaced rearwardly from a top surface of the first wall portion. This can enable the plastic component to contact and cover a top side of at least one anchoring element.
[020] In one embodiment, the tips of the teeth are formed by the plastic component, the plastic component additionally engaging the anchoring elements by positive engagement in a joint area between the tooth shank portions of the metal component and the tips of the teeth. Consequently, the plastic component can be firmly joined to the metal component and connected with the metal component in a positive-fitting manner or form-fit at the same time.
[021] In one embodiment, the plastic component and the metal component form an integrally formed part selected from the group consisting of molded part with inner insert, molded part with outer insert and molded part with overlap. By way of example, the metal component can be supplied as a metal insert component. The metal insert component may be arranged in a mold for the plastic component and at least molded with overlap in section with the plastic component.
[022] In one embodiment, the teeth of the at least one toothed leading edge comprise, when viewed in a cross-sectional plane perpendicular to the lateral direction Y, a substantially U-shaped shape comprising a first leg in the first wall portion and a second leg on the second wall portion, the first leg and the second leg integrating with each other at the tips of the teeth. Between the first leg and the second leg, a mounting gap or slot can be provided for the movable cutter blade, particularly for the teeth thereof.
[023] According to a further aspect of the disclosure, a set of blades for an apparatus for cutting hair is presented, said set of blades being arranged to be moved through the hair in a direction of movement to cut the hair. , wherein said set of blades comprises: - a stationary blade formed in accordance with at least some principles of the present disclosure, and - a movable cutter blade comprising at least one toothed leading edge, said movable cutter blade being disposed so as to be movable within the guide slit defined by the stationary blade, so that, upon relative movement between the movable cutter blade and the stationary blade, the at least one toothed leading edge of the movable cutter blade cooperates with the corresponding teeth of the stationary blade to enable the cutting of hair caught between them in a cutting action.
[024] It is particularly preferred that the set of blades consists of the stationary blade and the mobile cutter blade. This may involve a drive force transmitting member for the moving cutter blade. In other words, it is preferable, in some embodiments, that the blade assembly does not comprise any additional elements. However, it is particularly preferred that the movable cutter blade be disposed in the guide slot without being activated by a separate activating member, such as a bias spring element. Consequently, it is preferred that a top side of the movable cutter blade is in contact with the first wall portion and that a bottom side of the movable cutter blade is in contact with the second wall portion. It is evident that the movable cutter blade can be arranged in the guide slot with a certain clearance with respect to the first wall portion and the second wall portion, respectively, since the movable cutter blade is preferably arranged in a sliding manner. in the guide slot.
[025] Relative movement may involve reciprocating movement of the movable cutter blade with respect to the stationary blade. In some embodiments, the relative motion may involve rotation of the movable blade relative to the cutter blade.
[026] According to yet another aspect of the disclosure, a method for manufacturing a composite stationary blade of metal and plastic of a set of blades for an apparatus for hair cutting is presented, said method comprising the following steps : - providing a metal component, particularly a sheet metal component, which forms at least substantially a central portion of a first wall portion, - providing a mold, particularly an injection mold, the mold defining a shape of a plastic component, - arranging the metal component in the mold, - providing a substitute component in the mold, the substitute component being configured to keep clean a guide slot to be formed of the stationary blade when molding, - forming, particularly , injection molding the plastic component, the plastic component and the metal component defining a first wall portion and a second wall portion of the blade. is stationary, the first wall portion being arranged to serve as a skin-facing wall when in operation, the second wall portion being at least partially displaced from the first wall portion so that the first wall portion and the second wall portion together define the guide slot for a movable cutter blade, the first wall portion and the second wall portion together forming at least one toothed leading edge comprising a plurality of teeth, and wherein the first wall portion and the second wall portion are connected at a front end of the leading edge, thus forming tooth tips, and - removing the replacement component from the stationary composite metal blade and plastic.
[027] In one embodiment of the method, the step of providing the substitute component in the mold comprises at least one of the following steps: - providing at least one side slide in the mold that defines the guide slot for the movable cutter blade, and - dispose of a separate replacement simulated component in the mold, particularly a reusable simulated component, with the simulated component being removed from the stationary composite metal and plastic sheet out of the mold.
[028] In one embodiment, the method may further comprise: - machining the metal component, wherein the machining of the metal component comprises at least one of the formation of tooth shank portions and the formation of anchoring elements in the metal component, and the step of machining the metal component further comprises at least one process selected from the group consisting of: - cutting, particularly laser cutting, - etching, particularly etching electrochemical strong water, - stamping, - coining, - erosion, particularly wire erosion, and combinations thereof.
[029] The tine shank portions may be arranged to cooperate with the tines of the movable cutter blade to cut hair. The anchoring elements may be arranged to be engaged by the plastic component of the stationary blade to fixedly join the plastic component and the metal component.
[030] According to yet another aspect of the disclosure, a method for manufacturing a set of blades for an apparatus for hair cutting is presented, said method comprising the following steps: - manufacturing a stationary blade formed of in accordance with at least some aspects of the present disclosure, - providing a movable cutter blade comprising at least one toothed leading edge arranged to cooperate with at least one respective toothed leading edge of the stationary blade; and - inserting the movable cutter blade into the guide slot of the stationary blade, particularly, introducing the movable cutter blade through a side opening of the stationary knife.
[031] Preferred embodiments of the invention are defined in the dependent claims. It is to be understood that the claimed method has preferred embodiments similar and/or identical to the claimed device and as defined in the dependent claims. Brief description of the drawings
[032] Several aspects of the disclosure will become evident and will be elucidated with reference to the modalities hereinafter described. In the following drawings:
[033] Figure 1 shows a schematic perspective view of an apparatus for cutting exemplary electric hairs adapted with an exemplary mode of a set of blades according to the present disclosure;
[034] Figure 2 shows a schematic top view of a cutting head comprising a set of blades according to the present disclosure, the cutting head being fixed to a connecting mechanism;
[035] Figure 3 is a bottom exploded perspective view of the set of blades shown in Figure 2;
[036] Figure 4 is a partial top view of a stationary blade of the set of blades shown in Figure 2, with the hidden edges of the stationary blade being shown for the purposes illustrated;
[037] Figure 5 is a partial perspective bottom view of a metal component of the stationary blade shown in Figure 3;
[038] Figure 6 is a cross-sectional view of the stationary blade shown in Figure 4 taken along line VI-VI in Figure 4;
[039] Figure 7 is a partial cross-sectional side view of the stationary blade shown in Figure 4 taken along line VII-VII in Figure 4;
[040] Figure 8 is an enlarged detail view of the stationary blade shown in Figure 6 in a leading edge portion thereof;
[041] Figure 9 is an enlarged detail view of the metal component of the stationary blade that basically corresponds to the view of Figure 8;
[042] Figure 10 is a bottom perspective view of a plastic component of the stationary blade shown in Figure 2 and Figure 3;
[043] Figure 11 is a top perspective view of the plastic component shown in Figure 10;
[044] Figure 12 is a partial top view of the movable blade assembly in Figure 2 and Figure 3, the hidden contours of a movable cutter blade thereof being indicated by dashed lines primarily for illustrative purposes;
[045] Figure 13 is a cross-sectional side view of the blade assembly shown in Figure 12 taken along line XIII-XIII in Figure 12;
[046] Figure 14 is an additional cross-sectional side view of the blade assembly shown in Figure 12 taken along line XIV-XIV in Figure 12;
[047] Figure 15a is a side view of an exemplary anchoring element of a stationary blade metal component;
[048] Figure 15b is yet another additional side view of another exemplifying anchoring element of the stationary blade metal component according to the embodiment shown in Figure 9;
[049] Figure 16 shows a partial bottom view of tooth shank portions and exemplifying anchoring elements of a metal component of the stationary blade according to Figure 9;
[050] Figure 17 shows yet another bottom view of tooth shank portions and exemplifying anchoring elements of a metal component of the stationary blade;
[051] Figure 18 shows yet another embodiment of tooth shank portions and anchoring elements of a metal component of the stationary blade;
[052] Figure 19 shows a side view of the stationary blade shown in Figure 2 and Figure 3;
[053] Figure 20 illustrates a cross section of a replacement component that is configured to form a guide slot in the stationary blade shown in Figure 19;
[054] Figure 21 is a broken bottom view of the stationary blade illustrated in Figure 19, with the mold halves and slides of a mold for molding the stationary blade are indicated by blocks partially shown primarily for illustrative purposes;
[055] Figure 22 is a bottom perspective view of an arrangement of the blade assembly and the connecting mechanism shown in Figure 2, the blade assembly being separate from the connecting mechanism;
[056] Figure 23 illustrates a top perspective view of the linkage mechanism shown in Figure 22, the linkage mechanism mounting elements being shown;
[057] Figure 24 is a side view of an arrangement of a set of blades and a connecting mechanism according to the modality shown in Figure 22;
[058] Figure 25 is a cross-sectional side view of the blade assembly illustrating mounting elements integrally formed on the stationary blade;
[059] Figure 26 shows an illustrative block diagram representing various steps of an embodiment of a method for manufacturing a stationary blade according to various aspects of the present disclosure;
[060] Figure 27 illustrates a further illustrative block diagram representing various steps of an embodiment of an exemplary method for manufacturing a movable cutter blade in accordance with various aspects of the present disclosure; and
[061] Figure 28 shows a further illustrative block diagram that represents several steps of an embodiment of an exemplary method for manufacturing a set of blades according to various aspects of the present disclosure. Detailed description of the invention
[062] Figure 1 schematically illustrates, in a simplified perspective view, an exemplary embodiment of an apparatus for cutting hair 10, particularly an apparatus for cutting electrical hair 10. The apparatus for cutting 10 may comprise a housing 12, a motor indicated by a dashed block 14 in the housing 12 and a drive mechanism indicated by a dashed block 16 in a housing 12. To drive the motor 14, at least in some modes of the cutting apparatus 10, an electric battery, indicated by a dashed block 17 in the housing 12, such as, for example, a rechargeable battery, a replaceable battery, etc., can be provided. However, in some embodiments, the cutting apparatus 10 may also be provided with a power cord for connection to a power source. A power supply connector can be provided in addition to or as an alternative to the electrical (internal) battery 17.
[063] The cutting apparatus 10 may additionally comprise a cutting head 18. In the cutting head 18, a set of blades 20 can be attached to the apparatus for cutting hair 10. The set of blades 20 can be driven by the motor 14 through the drive mechanism or drive train 16 to enable a cutting movement. Cutting motion can generally be thought of as relative motion between a stationary blade 22 and a movable blade 24 which are shown and illustrated in more detail in Figure 3, for example, and will hereinafter be described and discussed. In general, a user can hold, hold and manually guide the cutting apparatus 10 through the hairs in a direction of movement 28 to cut the hairs. The cutting apparatus 10 can generally be considered as an electrically powered device for manual operation and guidance. Additionally, the cutting head 18 or, more particularly, the blade assembly 20 may be connected to the housing 12 of the cutting apparatus 10 in a pivotal manner, with reference to the double curved arrow indicated by reference numeral 26 in Figure 1. in some embodiments, the shaving apparatus 10 or, more specifically, the shaving head 18 including the blade assembly 20 can be moved along the skin to cut hair that grows on the skin. By cutting the hairs close to the skin, basically a shaving or waxing operation can be performed, aiming to cut or shave at the level of the skin. However, also cutting (or trimming) operations can be considered, whereby the cutting head 18 comprising the set of blades 20 is passed along a path at a desired distance from the skin.
[064] When guided or moved through the hairs, the cutting apparatus 10 including the blade assembly 20 is typically moved along a common movement direction which is indicated by reference numeral 28 in Figure 1. It is worth mentioning in this connection whereas, considering that the hair-cutting apparatus 10 is normally guided and moved manually, the direction of movement 28 does not therefore necessarily have to be interpreted as a precise geometric reference that has a fixed definition and relationship with respect to the orientation of the hair-cutting apparatus 10 and its cutting head 18 adapted with the blade assembly 20. That is, a general orientation of the hair-cutting apparatus 10 in relation to the hairs to be cut into the skin can be interpreted as, in a sense, , fickle. However, for purposes of illustration, it can reasonably be assumed that the direction of (imaginary) motion 28 is parallel (or generally parallel) to a central principal plane of a coordinate system which may then serve as a means of describing features. structural features of the hair-cutting apparatus 10.
[065] For ease of reference, coordinate systems are indicated on several drawings in this document. By way of example, an X-Y-Z Cartesian coordinate system is shown in Figure 1. An X axis of the respective coordinate system extends in a generally longitudinal direction that is generally associated with length, for the purpose of this disclosure. A geometric Y axis of the respective coordinate system extends in a lateral (or transverse) direction associated with width, for the purpose of this disclosure. A geometric axis Z of the coordinate system extends in a height (or vertical) direction which may also be referred to, for illustrative purposes, at least in some embodiments, as a generally vertical direction. It is evident that an association of the X-Y-Z coordinate system with the characteristic features and/or modalities of the pile cutting apparatus 10 is primarily provided for illustrative purposes and will not be interpreted in a limiting way. It should be understood that those skilled in the art can readily convert and/or transfer the coordinate system provided herein when confronted with alternative embodiments, respective Figures and illustrations that include different orientations. It further goes without saying that, for the purpose of the present disclosure, the X-Y-Z coordinate system is generally aligned with the main directions and orientations of the cutting head 18 including the blade assembly 20.
[066] Figure 2 illustrates a top perspective view of an exemplary modality of the cutting head 18 that can be attached to the hair cutting apparatus, as shown in Figure 1. The cutting head 18 is provided with the set of blades 20 as already indicated above. Blade assembly 20 comprises a stationary blade 22 and a movable cutter blade 24 (hidden in Figure 2). Further reference is made in this connection to the exploded view of the blade assembly 20 shown in Figure 3. The stationary blade 22 and the movable cutter blade 24 are configured to be moved relative to each other, thus cutting hairs on their respective sharp edges.
[067] The stationary blade 22 further comprises a top surface 32 which can be considered as a surface facing the skin. Generally, when operating as a shaving or waxing device, the hair trimming apparatus 10 is oriented so that the top surface 32 is basically parallel to or slightly slanted with respect to the skin. However, alternative modes of operation can also be envisaged, in which the top surface 32 is not necessarily parallel or at least substantially parallel to the skin. For example, the hair trimming apparatus 10 can additionally be used for shaving or, more generally, styling. Hairstyle may be aimed at processing transitions or considerably sharp edges between portions of the user's beard or portions of hair treated differently. By way of example, styling may involve the precise shaping of sideburns or additional distinct facial hair corrections. Consequently, when used in a styling mode, the top surface 32 and the portion of the skin currently to be treated are arranged at an angle, in particular substantially perpendicular to each other.
[068] However, primarily for illustrative purposes, the top surface 32 and similarly oriented components and portions of the hair trimming apparatus 10 can hereinafter be considered as skin-facing portions and components. Consequently, elements and portions that are oriented in an opposite manner may hereinafter be considered as backwards oriented portions and elements or, preferably, elements and portions facing the opposite side of the skin, for the purposes of the disclosure.
[069] As already indicated above, the stationary blade 22 can define at least one toothed leading edge 30. As shown in Figure 2, the stationary blade 22 can define a first leading edge 30a and a second leading edge 30b that are displaced one of the another in the longitudinal direction X. The at least one toothed leading edge 30a, 30b may generally extend in the lateral direction Y. The top surface 32 can be considered as a surface which is generally parallel to a plane defined by the longitudinal direction X and by the lateral direction Y. On the at least one toothed leading edge 30, a plurality of teeth 36 of the stationary blade 22 can be provided. The teeth 36 can alternate with respective tooth slots. Tooth gaps can define gaps between teeth 36. Hairs can enter gaps when the hair cutting apparatus 10 is moved through the hairs in the direction of movement 28 (Figure 1).
[070] The stationary blade 22 can be arranged as a composite component of metal and plastic, for example. In other words, the stationary blade 22 can be obtained from a multi-step fabrication method which may include providing a metal component 40 (see also Figure 3) and forming or, more precisely, molding a plastic component 38 which includes joining the metal component 40 and the plastic component 38. This may particularly involve forming the stationary blade 22 by means of an internal supplement molding process, external supplement molding process or by an overlay molding process. In general, the stationary blade 22 can be thought of as a two-component stationary blade 22. However, since the stationary blade 22 is preferably formed through an integrated manufacturing process, basically no conventional assembly step is required by forming the stationary blade 22. Instead, the integrated manufacturing process may include a final shape manufacturing step or at least a manufacturing process close to the final shape. By way of example, molding the plastic component 38 which may also include joining the plastic component 38 to the metal component 40 can readily define a configuration close to the final shape or a final shape configuration of the stationary blade 22. It is particularly preferred that the metal component 40 is made of sheet metal. It is particularly preferred that the plastic component 38 is made of an injection moldable plastic material.
[071] The formation of the stationary blade 22 from different components, in particular, the integral formation of the stationary blade 22 can also have the advantage that the portions thereof that have to face high loads during operation can be formed from respective high strength materials (eg metallic materials), while portions thereof which are generally not exposed to high loads, when in operation, may be formed from different materials which can significantly reduce manufacturing costs. The formation of the stationary blade 22 as a plastic-metal composite part can further have the advantage that skin contact can be experienced by the user more comfortably. Particularly, the plastic component 38 can exhibit a greatly reduced thermal conductivity as compared to the metal component 40. Consequently, the heat emission perceived by the user upon hair clipping can be reduced. In conventional hair-cutting apparatus, heat generation can be considered as a major barrier to improving cutting performance. Heat generation basically limits the power and/or cutting speed of hair clippers. By basically adding heat insulating materials (eg plastic materials), heat transfer from heat generating points (eg sharp edges) to the user's skin can be greatly reduced. This applies in particular to the tips of the teeth 36 of the stationary blade 22 which can be formed of plastic material.
[072] Forming the stationary blade 22 as an integrally formed composite part of metal and plastic can further have the advantage that additional functions can be integrated into the design of the stationary blade 22. In other words, the stationary blade 22 can provide enhanced functionality without the need to attach or mount additional components to it.
[073] By way of example, the plastic component 38 of the stationary blade 22 can be fitted with side protection elements 42 which can also be considered as so-called side side protectors. The side shield elements 42 can cover the side ends of the stationary blade 22, with reference also to Figures 3 and 10. Consequently, direct contact with the skin at the relatively sharp side edges of the metal component 40 can be avoided. This can be particularly beneficial, as the metal component 40 of the stationary blade 22 is relatively slender so as to make it possible to cut hair close to the skin during shaving or waxing. However, at the same time, the relatively slender arrangement of the metal component 40 could cause skin irritation when it slides over the skin surface during shaving or waxing. Since particularly the skin contacting portion of metal component 40 may actually be so thin that relatively sharp edges may remain, the thinner actually the metal component 40 and stationary blade 22 will be, the greater the risk of skin irritations or even skin cuts. Therefore, it is preferred, at least in some embodiments, to protect the side sides of the metal component 40. The side protection elements 42 may project from the top surface in the vertical direction or height Z direction. Side shield 42 may be formed as an integrated part of the plastic component 38.
[074] The stationary blade 22 can additionally be provided with mounting elements 48 that can enable quick attachment to and quick release of a connecting mechanism 50. Mounting elements 48 can be arranged on the plastic component 38, in particular, integrally formed with the plastic member 38, with reference also to Figures 3 and 10. The mounting elements 48 may comprise mounting protrusions, particularly snap-in mounting elements. Mounting elements 48 may be configured to cooperate with respective mounting elements in connection mechanism 50. It is particularly preferred that blade assembly 20 can be secured to connection mechanism 50 without any additional separate securing member.
[075] The linking mechanism 50 (with reference to Figure 2) can connect the blade assembly 20 and the housing 12 of the hair cutting apparatus 10. The linking mechanism 50 can be configured so that the blade assembly 20 can rotate or rotate during operation when guided through the hairs. The link mechanism 50 can provide the blade assembly 20 with a contour following capability. In some embodiments, the link mechanism 50 is arranged as a four-bar link mechanism. This can enable a defined rotation characteristic of the blade assembly 20. The linkage mechanism 50 can define a virtual pivot axis for the blade assembly 20.
[076] Figure 2 further illustrates an eccentric coupling mechanism 58. The eccentric coupling mechanism 58 can be considered as a part of the drive mechanism or drive train 16 of the hair-cutting apparatus 10. The eccentric coupling mechanism 58 can be arranged to transform a rotational drive movement, with reference to a curved arrow indicated by reference numeral 64 in Figure 2, into a reciprocating movement of the movable blade 24 with respect to the stationary blade 22, with reference also to Figure 12 in that connection. (double arrow indicated by reference number 126). The eccentric coupling mechanism 58 may comprise a drive shaft 60 which is configured to be driven for rotation about a geometric axis 62. At a front end of the drive shaft 60 facing the blade assembly 22, an eccentric portion 66 can be provided. The eccentric portion 66 may comprise a cylindrical portion which is offset from the (central) axis 62. Under rotation of the drive shaft 60, the eccentric portion 66 may revolve around the axis 62. The eccentric portion 66 is arranged to engage a transmission member 70 attachable to the movable blade 24.
[077] With further reference to the exploded view shown in Figure 3, the transmission member 70 will be further detailed and described. The transmission member 70 may comprise a reciprocating element 72 which may be configured to be engaged by the eccentric portion 66 of the drive shaft 60, with reference also to Figure 2. Accordingly, the reciprocating element 72 may be reciprocally driven by the drive shaft 60. drive 60. The transmission member 70 may further comprise a connecting bridge 74 which may be configured to contact the movable blade 24, particularly a main portion 78 thereof. By way of example, connecting bridge 74 can be joined to movable cutter blade 24. Joining can involve brazing, soldering, and similar processes. However, in at least some embodiments, the connecting bridge 74 or a similar connecting member of the transmission member 70 may preferably be attached to the movable cutter blade 24. For use herein, attachment may involve connecting operations by fitting, plugging, pressing or similar mounting. The transmission member 70 may additionally comprise a mounting element 76 which can be disposed on the connector bridge 74. On the mounting element 76, the reciprocating element 72 may be attached to the connector bridge 74. By way of example, the connector bridge 74 and mounting member 76 can be arranged as a metal part. By way of example, the reciprocating element 72 may be arranged as a plastic part. For example, the mounting element 76 may involve snap-fit elements for securing the reciprocating element 72 to the connecting bridge 74. However, as an alternative, the mounting element 76 can be considered as an anchoring element for the reciprocating element 72 when the latter is firmly joined to the connecting bridge 74.
[078] It is worth mentioning in this regard that the transmission member 70 may be mainly arranged so as to transmit a reciprocating lateral drive motion to the movable cutter blade 24. Meanwhile, the transmission member 70 may be additionally arranged so as to serve as a loss prevention device for the movable cutter blade 24 in the blade assembly 20.
[079] Figure 3 further illustrates the plastic component 38 and the metal component 40 of the stationary blade 22 in an exploded state. It is worth mentioning in this connection that, since it is preferred that the stationary blade 22 be integrally formed, the plastic component 38 thereof generally does not exist as such in an isolated, exclusive state. Rather, in at least some embodiments, forming the plastic component 38 may necessarily involve firmly joining the plastic component 38 to the metal component 40.
[080] The stationary blade 22 can comprise at least one side opening 68 through which the movable cutter blade 24 can be inserted. Consequently, the movable cutter blade can be inserted in the lateral direction Y. However, at least in some embodiments, the transmission member 70 can be moved to the movable cutter blade 24 basically along the vertical direction Z. The coupling of the movable cutter blade 24 and the transmission member 70 may therefore firstly involve inserting the movable cutter blade 24 through the side opening 68 of the stationary blade 22 and, secondly, when the movable cutter blade 24 is disposed on the stationary cutter blade 22, inserting or move the transmission member along the vertical direction Z to the stationary blade 22 so that it is connected to the movable cutter blade 24.
[081] In general, the movable cutter blade 24 may comprise at least one toothed leading edge 80 adjacent to the main portion 78. In particular, the movable cutter blade 24 may comprise a first leading edge 80a and a second leading edge 80b that is longitudinally displaced. from the first leading edge 80a. On the at least one leading edge 80, a plurality of teeth 82 can be formed which are alternated with respective tooth slots. Each of the teeth 82 can be provided with respective cutting edges 84, particularly on their lateral flanks. The at least one toothed leading edge 80 of the movable cutter blade 24 may be arranged to cooperate with a respective toothed leading edge 30 of the stationary blade 22 when relative movement of the movable cutter blade 24 and the stationary blade 22 is induced. Consequently, the teeth 36 of the stationary blade 22 and the teeth 82 of the mobile cutter blade 24 can cooperate to cut hair.
[082] With particular reference to Figures 4 to 9, the structure and configuration of an exemplary embodiment of the stationary blade 22 will be further detailed and illustrated. Figure 4 is a partial top view of the stationary blade 22, the hidden portions of the metal member 40 (also referred to as Figure 5) being shown for illustrative purposes. On the teeth 36 of the stationary blade 22, tips 86 may be formed. The tips 86 may be primarily formed by the plastic component 38. However, substantial portions of the teeth 36 may be formed by the metal component 40. As best seen from the Figure 5, the metal member 40 may comprise so-called tooth shank portions 88 which may form a substantial portion of the teeth 36. The tine shank portions 88 may be provided with respective cutting edges 94 which are configured to co-operate with the teeth. cutting edges 84 of the teeth 82 of the movable cutter blade 24. At the longitudinal ends of the tooth shank portions 88, anchoring elements 90 can be arranged. additionally connecting the metal component 40 and the plastic component 38.
[083] By way of example, the anchoring elements 90 can be provided with undercuts or recessed portions. Consequently, the anchoring elements 90 can be arranged as barbed anchoring elements. Preferably, a respective portion of the plastic component 38 that comes into contact with the anchoring elements 90 cannot be detached or released from the metal component 40 without being damaged or even destroyed. In other words, the plastic member 38 can be inextricably connected to the metal member 40. As shown in Figure 5, the anchoring elements 90 can be provided with recesses or holes 92. The holes 92 can be arranged as slot holes, by example. By molding the plastic component 38, the plastic material can enter the holes 92. As best seen from Figures 6 and 8, the plastic material can fill the recesses or holes 92 of the anchoring elements 90 from both. sides (vertical), that is, from the top side and from the bottom side. Consequently, the anchor elements 90 can be completely covered by the plastic component 38. Adjacent to the anchor elements 90, the points 86 can be formed. The formation of the points 86 from the plastic component 38 can further have the advantage that the front end of the leading edge 30 is formed from a relatively soft material that can be further rounded or chamfered in order to soften the edges. Consequently, the user's skin contact with the front edges of the leading edge 30 is generally not experienced to cause skin irritation or similar adverse effects. In addition, high temperature spots can be prevented at the tips 36 as the plastic component 38 normally has a relatively low coefficient of thermal conductivity compared to the metal component 40.
[084] As best seen from the cross-sectional views of Figures 6, 7 and 8, the edges of the tips 86 of teeth 36 at the front ends of the front edges 30 can be significantly rounded. As can be further seen, the transition between metal component 40 and plastic component 38 on top surface 32 in the region of teeth 36 can be substantially seamless or continuous. Reference is made further in this regard to Figure 9. It may be advantageous to shape the anchoring elements 90 so that their upper side (skin-facing side) is displaced from the top surface 32. Consequently, the facing side for the skin of the anchor elements 90 may be covered by the plastic component, with reference also to Figure 8. In one embodiment, the anchor elements 90 may be angled relative to the top surface 32. The anchor elements 90 may be arranged at an angle α (alpha) with respect to the tooth shank portions 88. It may be additionally preferred that the anchoring elements 90 be flexed back relative to the top surface 32. In at least some embodiments, the anchoring elements 90 they can be thinner than the tooth shank portions 88. This can further enlarge the space that can be filled by the plastic component 38 upon molding.
[085] With further reference to Figure 6, the stationary blade 22 will be further detailed and described. The stationary blade 22 may define and encompass a guide slot 96 for the movable cutter blade 24. To this end, the stationary blade 22 may comprise a first wall portion 100 and a second wall portion 102. For the purposes of this disclosure, the first wall portion 100 can be considered as a skin-facing wall portion. This applies in particular when the razor set 20 is used for shaving or waxing. Consequently, the second wall portion 102 can be considered as the wall portion facing away from the skin. In other words, the first wall portion 100 may also be called the top wall portion. The second wall portion 102 may also be called the bottom wall portion.
[086] The first wall portion 100 and the second wall portion 102 may together define the teeth 36 of the stationary blade. Teeth 36 may comprise a slot or gap for the movable cutter blade 24, particularly for teeth 82 thereof disposed on at least one toothed leading edge 80. As indicated above, at least a substantial portion of the first wall portion 100 may be formed by metal component 40. At least a substantial portion of second wall portion 102 may be formed by metal component 38. In the exemplary embodiment illustrated in Figure 6, second wall portion 102 is entirely formed by plastic component 38. Instead, the first wall portion 100 is together formed by the plastic component 38 and the metal component 40. This applies in particular to the leading edge 30. The first wall portion 100 may comprise in respective portions. of tooth thereof, joint portions 106, where the plastic member 38 is joined to the metal member 40. The joint portions 106 may surround the anchoring elements 90 of the compound. metal face 40 and the plastic material of the plastic component 38 covering the anchoring elements 90.
[087] Figure 6 and Figure 8 illustrate a cross section through a tooth 36, also referring to the line VIII-VIII in Figure 4. In contrast, Figure 7 illustrates a cross section through a tooth gap, with reference to line VII-VII in Figure 4. As can be seen from Figure 6 and Figure 7, first wall portion 100 and second wall portion 102 may together form leading edge 30 including teeth 36 The first wall portion 100 and the second wall portion 102 may together define a basically U-shaped side cross-section of the respective teeth 36. The first wall portion 100 may define a first leg 110 of the shaped shape. of U. The second wall portion 102 may define a second leg of the U shape. The first leg 110 and the second leg 112 may be connected at the ends 86 of the teeth 36. Between the first leg 110 and the second leg 112 , a slit can be provided or go to the movable cutter blade 24.
[088] As can be further observed from Figure 6, the first wall portion 100 may be significantly thinner than the second wall portion 102 of the stationary blade 22. Consequently, in the first wall portion 100 facing the skin, hair can be cut too close to the skin. Therefore, it is desirable to reduce the thickness of the first wall portion 100, particularly of the metal component 40. By way of example, the thickness ltm (referring to Figure 7) of the metal component 40, particularly the shank portions of tooth 88, can be in the range of about 0.08 mm to 0.15 mm. Consequently, the first wall portion 100 can therefore exhibit considerably little stiffness and strength. Therefore, it is beneficial to support or strengthen the first wall portion 100 by the addition of the second wall portion 102. Since the thickness of the second wall portion 102 basically does not influence the shortest achievable cut length (e.g. remaining on the skin), the thickness of the second wall portion 102, particularly the respective front edges 30, may be significantly greater than the thickness ltm of the first wall portion 100, particularly of the metal component 40. This can provide for the stationary blade 22 sufficient stability and strength. As can be further seen from Figure 6, the first wall portion 100 and the second wall portion 102 can basically form a closed profile, at least in section, along their lateral extent, with reference also to Figure 10 and Fig. 11 in this connection. This can apply particularly when the stationary blade 22 is provided with a first and a second leading edge 30a, 30b. Consequently, the rigidity of the stationary blade 22, particularly the rigidity against bending stress or torsional stress, can be further increased.
[089] In one embodiment, the second wall portion 102 may comprise, adjacent to the second leg 112 at the respective leading edge 30, an inclined portion 116. Assuming that the stationary blade 22 is basically asymmetric in shape with respect to a defined central plane by the vertical direction Z and by the lateral direction Y, the second wall portion 102 may further comprise a central portion 118 adjacent to the sloping portion 116. Accordingly, the central portion 118 can be interposed between a first sloping portion 116 and a second portion sloping 116. First sloping portion 116 may be positioned adjacent a respective second leg 112 on a first leading edge 30a. The second sloping portion 116 may be positioned adjacent a respective second leg on the second leading edge 30b. As best seen in Figure 6, the second wall portion 102 can therefore comprise a basically M-shaped cross section defined primarily by the sloping portions 116 and the central portion 118.
[090] With further reference to Figure 10 and Figure 11, the shape and configuration of an exemplary embodiment of the plastic component 38 of the stationary blade 22 are further detailed and described. As best seen in Figure 10, the sloping portions 116a, 116b can basically extend the full (side) length of the plastic member 38. The front edges 30a, 30b can generally extend between a first element of side shield 42 and a second side shield element 42 which are disposed at opposite (side) ends of the plastic component 38. A recessed portion of the plastic component shown in Figure 8, which basically defines an underside of the guide slot 96, is, generally covered by metal component 40, with reference to Figure 2.
[091] As best seen from Figure 11, the central portion 118 between the sloping portions 116a, 116b may generally extend over a substantial portion of the entire length (side) of the plastic component 38. However, along the central portion 118, at least one opening slit 120 may be provided. In accordance with the exemplary embodiment shown in Figure 10 and Figure 11, the central portion 118 may be disposed between a first opening slit 120a and a second opening slit 120b. The opening slits 120a, 120b can define at least one opening through which, in the assembled state, the movable cutter blade 24 can be brought into contact by the transmission member 70. As best seen in Figure 10, the plastic member 38 it may further comprise at least one guide element 122, particularly a plurality of guide elements 122 which can be configured to guide the connecting bridge 74 and, consequently, the movable cutter blade 24 connected thereto. In one embodiment, the plurality of guide elements 122 may be arranged in pairs, the respective pairs being disposed at ends laterally displaced from the central portion 118. The guide elements 122 may be arranged as convex shaped profiles extending basically from vertical way. Guide elements 122 can define a longitudinal position of the transmission member 70 and the movable cutter blade 24.
[092] It is worth mentioning further in this regard that the central portion 118 and particularly the at least one opening slot 120 for the transmission member 70 may be configured differently in alternative embodiments. By way of example, in one embodiment, the central portion 118 is interrupted by a single opening slit 120 through which the connector bridge 74 can contact the movable cutter blade 24. Therefore, it is emphasized that the connector bridge 74 of the transmission member 70 does not necessarily have to comprise two contact points for the movable cutter blade 24 that are spaced considerably from each other in the lateral direction Y, as seen in Figure 3. Instead, the connecting bridge 74 can also contact the movable cutter blade 24 at a central (side) portion.
[093] With particular reference to Figures 12, 13 and 14, the blade assembly 20 that includes the stationary blade 22 that is fitted with the movable blade 24 is further detailed and described. Figure 12 is a partial top view of the blade assembly 20 wherein the hidden contours of the movable cutter blade 24 are indicated by dashed lines. Figure 13 is a cross-sectional view of the arrangement shown in Figure 12, the section involving a tooth 36 on the stationary blade 22 and a tooth slot on the movable cutter blade 24, with reference to line XIII-XIII in Figure 12. In contrast, the cross-sectional view shown in Figure 14 includes a section through a tooth slot on the stationary blade 22 and a tooth 82 on the movable cutter blade 24, with reference to line XIV-XIV in Figure 12. The movable cutter blade 24 can be driven relative to stationary blade 22 in a reciprocating manner, with reference to a double arrow indicated by 126 in Figure 12. Upon relative movement of stationary blade 22 and movable cutter blade 24, respective teeth 36 and 82 can cooperate to cut hairs that enter the respective tooth gaps.
[094] The transmission member 70 which is basically configured to transmit drive motion to the movable cutter blade 24 may extend through the stationary blade 22, particularly through the at least one opening slit 120 associated with the central portion 118 of the stationary blade 22, with reference to Figure 11. Figure 14 additionally shows a pair of guide elements 122 that can guide the transmission member 70 and, consequently, the movable cutter blade 24. The guide elements 122 can define the longitudinal position of the transmission member 70 and the movable cutter blade 24 on the stationary blade 22.
[095] It is particularly preferred that, at least in some embodiments, the movable cutter blade 24 is disposed in the guide slot 96 in a defined manner. It may additionally be preferred that no additional mounting members, particularly no activation members, are required to hold the movable cutter blade 24 in its desired position and in close contact with the first wall portion 100. This can be achieved. since the stationary blade 22 is provided with the first wall portion 100 and the second wall portion 102 opposite the first wall portion 100. Both wall portions 100, 102 can define an exact mating slot for the movable cutter blade 24 , particularly to the teeth 82 thereof, so that the vertical position (Z position) of the movable cutter blade 24 can be set to close tolerances. This can significantly reduce the cost of manufacturing and assembling the blade assembly 20.
[096] By way of example, the stationary blade 22 and the mobile cutter blade 24 can be configured so that the mobile cutter blade 24 contacts, at least in section, with the first wall portion 100 in a substantially flat manner . This can particularly apply to the respective tooth portions. It is worth mentioning in this connection that such a configuration does not require perfect surface contact in practice when the blade assembly 20 is in operation. In contrast, it can be assumed that the stationary blade 22 and/or the mobile cutter blade 24 can be flexed or preloaded, at least when in operation, so that only small contact areas remain. However, the first wall portion 100 may serve at least as a defined limit stop for the movable cutter blade 24 in the Z (vertical) direction. The second wall portion 102 may comprise a protruding contact surface 130 that is associated with a respective toothed front edge 30. The protruding contact surface 130 may be disposed at a transition between the second leg 112 and the sloping portion 116 of the second wall portion 102, with reference to Figure 14. The protruding contact surface 130 may define a resulting height or span dimension in the guide slot 96 for the movable cutter blade 24. The resulting span lcl (with reference to Figure 7) can be defined so that a defined clearance for the movable cutter blade 24 to be mounted is provided. Consequently, the movable cutter blade 24 can be disposed on the stationary blade 22 without significant preload, at least in an idle state. However, in yet another embodiment, the height or span dimension for the cutter blade 24 to be mounted in the slot 96 can be defined so that, basically, an interference fit is provided. Consequently, the movable cutter blade 24 can be at least slightly preloaded by the stationary blade 22. The height dimension or thickness dimension lt (with reference to Figure 14) of the movable cutter blade 24, on at least one toothed leading edge 80 of the same, they can be in the range of 0.1 mm to 0.18 mm.
[097] Figures 15a to 18 illustrate additional advantageous alternative embodiments of metal components 40 that may serve as at least a substantial portion of first wall portion 100. Figure 15a and Figure 15b show side views of tooth shank portions 88 examples from which the anchoring elements 90 extend. Figures 16 to 18 illustrate bottom views of exemplary tooth shank portions 88 from which respective anchoring elements 90 protrude. As already explained in connection with the embodiment of the stationary blade 22 illustrated in Figures 4 to 9, it may be advantageous to form the anchoring elements 90 so that the plastic component 38 of the stationary blade 22 can fully cover the anchoring elements 90, i.e. , the sides thereof protruding from the tooth shank portions 88. Since it is additionally preferred that the top surface 32 (with reference to Figure 2) of the stationary blade 22 is basically flat or uniform or so. more generic, comprises a smooth surface, except for the side protection elements 42 (if any), it is advantageous to provide some space or displacement on the upper side 134 of the anchoring elements 90 so that the plastic material can also cover the side top 134 by molding. It is worth mentioning in this connection that the uniform shape or preferred plane of the top surface 32 does not necessarily preclude that, in practice, the first wall portion 100 and the top surface 32 thereof may be slightly curved or flexed. In contrast, in at least some embodiments, it can be anticipated that the first wall portion 100 exhibits a slightly convex longitudinal extent.
[098] Figure 15a illustrates an embodiment of the stationary blade 40, wherein the anchoring element 90 is displaced from the top surface 32, particularly, displaced in a substantially parallel manner. A resulting displacement dimension lo is shown in Figure 15a. The displacement dimension lo can be in the range of about 0.03 mm to about 0.1 mm, for example. Figure 15b illustrates a further alternative embodiment of anchoring elements 90 in tine shank portions 88 of metal member 40. As with the embodiment illustrated in Figure 15a, tine shank portion 90 illustrated in Figure 15b may be displaced to from the top surface 32 of the metal member 40. Additionally, the anchoring member 90 may be bent or flexed relative to the tooth shank portion 40. A vertical displacement dimension is indicated in Figure 15b by it. An angle of inclination is denoted in Figure 15b by α (alpha). By way of example, the displacement dimension lo may be in the range of about 0.03mm to 0.08mm. The angle of inclination α is preferably an acute angle. By way of example, the angle of inclination α may be in the range of about 10° (degrees) to about 35° (degrees).
[099] Figure 16 illustrates a bottom view of tooth shank portions 88 that include anchoring elements 90 that may be formed in accordance with the embodiment shown in Figure 15b. The tine shank portions 90 may comprise a lateral width or extension ws that is greater than a lateral width or extension wa of the anchoring elements 90. The extension wa may be selected so that the plastic material of the plastic component 38 can also cover (side) surfaces of the anchoring elements 90 without exceeding the width ws of the tooth shank portions 88. It is generally preferred that the anchoring elements 90 comprise some recessed features, particularly barbed features, in order to enable a coupling fitting of the anchoring elements 90 and the plastic member 38. As already shown in Figure 5, the anchoring elements 90 can be provided with holes, slots or, more particularly, slot holes 92. Therefore, the plastic material can enter into the respective recesses 92. Consequently, the metal component 40 and the plastic component 38 can be connected at their respective joining portions. in a way firmly joined and additionally adjusted to the form. Figure 17 and Figure 18 illustrate additional exemplary embodiments of anchoring elements 90 for tooth shank portions 88. By way of example, the anchoring elements 90 illustrated in Figures 17 and 18 may be formed in accordance with the embodiment shown in Figure 15a. The anchoring element 90 of Figure 17 may comprise recessed portions 92 formed as holes, particularly as cylindrical holes. The anchoring elements 90 illustrated in Figure 18 may involve recessed portions 92 which are arranged as side recesses. Consequently, the anchoring elements 90 may surround a channel portion in its longitudinal extent. For example, the anchoring elements 90 can basically comprise an H-shaped shape (rotated by 90°).
[0100] It should be understood that the exemplary embodiments illustrated in Figures 15 to 18 are primarily to be interpreted as beneficial exemplary executions provided for the sake of understanding. Therefore, several alternative embodiments of the anchoring elements 90 and their respective recessed portions 92 can be considered without departing from the scope of the present disclosure. In general, it is preferred that the anchoring elements 90 are provided with form-fitting elements, so that the metal component 40 and the plastic component 38 can be connected as the anchoring elements in a close-knit, but also fitted, fashion. form.
[0101] With reference to Figures 19, 20 and 21, the aspects related to the fabrication of the stationary blade 22 will be illustrated and further detailed. Figure 19 is a side view of stationary blade 22 including plastic member 38 and metal member 40. Plastic member 38 and metal member 40 together define a wrap that surrounds guide slot 96 for the movable blade. 24, with reference also to Figure 13 and Figure 14. Figure 20 illustrates a sectional area of the guide slot 96 for illustrative purposes. Fabricating the stationary blade 22 can basically comprise inserting the metal component 40 into a mold, filling the space required for the guide slot 96 and molding the plastic component, particularly injection molding the plastic component 38 , thus joining the plastic component 38 to the metal component 40. The cavity that basically defines the guide slot 96 can be filled with a so-called substitute component 140, shaped according to the section shown in Figure 20. The component Substitute 140 can also be thought of as a dummy component 140. Substitute component 140 can be inserted into the mold for plastic component 38 and occupy the space of guide slot 36. Substitute component 140 can generally be arranged as a component reusable replacement or a non-replaceable component that may also be called a replacement component.
[0102] Further reference is made to Figure 21 which comprises a broken bottom view of the stationary blade 22 and a schematic illustration of a mold 136 for the stationary blade 22. By way of example, the mold 136 for forming the stationary blade 22 may involve two (main) mold halves 138-1, 138-2 which are arranged to be moved towards each other in close contact, thus defining the mold cavity for the stationary blade 22, particularly for the plastic component 38 of the same. Reference is also made to the respective arrows in Figure 21 which indicate the respective (longitudinal) movement of the mold halves 138-1, 138-2. In the case where the substitute component 140 is arranged as a reusable component, the substitute component 140 may be incorporated by at least one slide, particularly by at least one laterally movable slide 140-1, 140-2. By way of example, a first slide 140-1 and a second slide 140-2 can be arranged to be moved into the cavity defined by the mold halves 138-1, 138-2, thus occupying the space defining the slit. of guide slot 96. Of course, alternative embodiments can be considered, in which a single slide 140 is used for forming the guide slot 96. The mold halves 138-1, 138-2 and the slides 140-1, 140- 2 can form mold 136 components which define the shape of stationary blade 22. It is evident that mold 136 can comprise additional components, e.g. Additional mold components may be required to form relatively complex integrated geometric features of the plastic component 38 of the stationary blade, with reference to mounting elements 48 in Figure 3, for example. Even additional components of the stationary blade 22 such as guide elements 122 and opening slots 120 can be formed by at least one additional slide.
[0103] It should be understood that mold halves 138-1, 138-2 and slides 140-1, 140-2 are illustrated in Figure 21 in a simplified manner primarily for illustration purposes. Further detailed shape and contour of mold halves 138-1, 138-2 and slides 140-1, 140-2 can be derived from the illustrations and description of the geometry and external shape of the stationary blade 22 shown herein.
[0104] In yet another exemplary embodiment, the substitute component 140 may be arranged as a component that is separate from the mold 136. In other words, the substitute component may alternatively be arranged as an insert component that can be inserted into the cavity defined by 136 together with metal component 40. However, it is preferred that such replacement insert component 140 is removable from the molded stationary blade 22 after molding, cooling and removal of the stationary blade 22 from the mold 136. Also in accordance with with this embodiment, the substitute component 140 can be a reusable substitute component.
[0105] In yet another embodiment, as already noted above, the substitute component 140 may be arranged as a non-reusable component which may also be called a lossy insert component. This may involve exemplary modalities where the substitute component 140 needs to be damaged or destroyed in order to be removed from the stationary blade 22.
[0106] Figures 22 to 25 illustrate additional beneficial modalities of the set of blades 20, particularly of the stationary blade 22 thereof. As already indicated above, at least a substantial portion of the stationary blade 22 can be formed by the metal component 38. Additional functions can be integrated into the stationary blade 22 without the need to add or assemble additional parts on the stationary blade 22. Figure 22 illustrates a bottom perspective view of the blade assembly 20 including the stationary blade 22 and the movable blade 24 and the transmission member 70 that is mounted thereto. Figure 22 further illustrates a linkage mechanism 50 to which the blade assembly 20 can be attached, with reference also to Figure 2. In Figure 22, the blade assembly 20 is shown in a released or detached state.
[0107] As shown in Figure 22, the link mechanism 50 can be arranged as a four-bar link mechanism. The connecting mechanism 50 may comprise a connecting element 208, particularly a first connecting element 208-1 and a second connecting element 208-2 which are laterally spaced from each other in the lateral direction Y. The at least one element of link 208 may comprise a base 210 which may also be called a contact element for connecting the link mechanism 50 and the housing 12 of the pile cutting apparatus 10, with reference also to Figure 1. The link element 208 may further comprise an upper or top portion 214 that is disposed opposite the base 210. The connecting element 208 may further comprise coupling elements connecting a base 210 and a top 214. For example, the connecting element 208 may comprise two coupling arms 212 each of which can be arranged between the base 210 and the top 214. The coupling arms 212 can be longitudinally spaced with respect to one another in the longitudinal direction. al Y. The base 210 and the top 214 can be spaced apart from one another in the height or vertical direction Z. In one embodiment, the respective members of the connecting element 208 can be coupled together via film hinges 216. Film hinges 216 (referring also to Figure 23) may provide neighboring members of connector 208 with the ability to pivot relative to one another. Consequently, the blade assembly 20, while being attached to the linkage mechanism 50, may rotate or rotate with respect to the housing 12 of the hair-cutting apparatus about a virtual geometric axis that is substantially parallel to the geometric axis Y that defines the sideways direction.
[0108] The stationary blade 22 can be provided with mounting elements 48, particularly on the second wall portion 102 thereof, so that the second wall portion 102 can contact the top 214 of the connecting element. Consequently, the blade assembly 20 and the top 214 can together rotate or rotate relative to the base 210 of the at least one link member 208. On the top 214 of the link member 208, a limit stop arrangement 218 can be provided. Boundary stop arrangement 218 may be configured to be in a position abutting a boundary stop element (not shown in Figure 22) that is associated with housing 12 of pile cutting apparatus 10.
[0109] Figure 23 illustrates a top perspective view of the connection mechanism 50. Figure 24 illustrates a side view of the arrangement shown in Figure 22, with the set of blades 20 being separate from the connection mechanism 50. Figure 25 illustrates a cross-sectional side view of the blade assembly 20, in which a section through the mounting elements 48 is shown. As best seen in Figures 22 and 25, the mounting elements 48 may comprise at least one guide protrusion 224 and at least one mounting boss 226 configurable to cooperate with at least one respective guide recess 220 and at least one respective mounting recess 222 on top 214 of connector element 208 (with reference to Figure 23). As can be seen from Figure 24, the blade assembly 20 can basically be inserted vertically into the connecting mechanism 50 for attachment. Consequently, the at least one guide protrusion 224 and the at least one corresponding guide recess 220 can generally extend in the vertical direction (Z direction). The at least one guide recess 220 and the at least one guide protrusion 224 can ensure that the blade assembly 20 assumes a desired orientation for attachment.
[0110] In contrast, the at least one mounting recess 222 and the at least one corresponding mounting boss 226 may be arranged for snap fit or interference fit. In some embodiments, the at least one mounting recess 222 and the at least one mounting boss 226 may be arranged as snap-in mounting elements. As best seen in Figure 25, the at least one mounting boss 226 can, at least partially or in section, extend in the longitudinal direction X. Consequently, the at least one mounting boss 226 can engage the respective mounting recess 222 in an activated manner or a snap-fit manner. In other words, the at least one mounting protrusion 226 can be at least slightly preloaded when it is mounted in the engaged or attached state. In general, the mounting protrusion 226 may be, at least partially or in section, slanted relative to a plane defined by the lateral Y direction and the vertical Z direction (with reference also to Figure 22). Accordingly, upon engagement of the mounting recess 222, the mounting boss 226 can exert a retaining force comprising at least one longitudinal component that can prevent unwanted disengagement of the blade assembly 20 from the link mechanism 50.
[0111] As shown by way of example in Figures 22 to 25, each of the connecting elements 208-1, 208-2 may be associated with a respective set of mounting elements 48. Each set of mounting elements 48 may comprise a pair of guide bosses 224 and one pair of mounting bosses 226 which may be arranged to cooperate with respective pairs of guide bosses 220 and mounting bosses 222 in each of the connecting elements 208-1, 208-2.
[0112] Referring to Figure 26, an exemplary fabrication method for a stationary blade 22 of a blade assembly 20 in accordance with various aspects of the present disclosure are further illustrated and detailed. In a first step S10, a raw material or semi-finished material for forming a metal component of the stationary blade can be provided. This may involve providing a sheet metal material. Supplying a sheet metal material may further involve supplying the sheet metal material from a coil. A respective intermediate metal material may comprise a plurality of portions, each defining a metal component to be terminated to the stationary blade. For example, each of these defined precursor portions can be pre-processed by means of stamping or another suitable cutting method.
[0113] Next, an additional step S12 can occur which includes the formation of intermediate leading edges, particularly, intermediate toothed leading edges of the metal components to be processed. By way of example, step S12 may involve forming tooth shank portions on the leading edges. Forming the tine shank portions may involve removing material between the respective tine shank portions in order to define gaps therebetween. This may involve a suitable material removal process, for example stamping, laser cutting, wire cutting or, more preferably, etching. Additional material removal processes can be envisaged. The formation of tooth shaft portions on respective leading edges of the metal components may further involve the formation of considerably sharp cutting edges on the tooth shaft portions, particularly on the lateral flanks thereof. Etching the tine shank portions may involve processing a general shape of the tine shank portions and additionally creating relatively sharp cutting edges on their flanks.
[0114] Then, an additional step S14 may occur which may include the formation or processing of anchoring portions. Preferably, the anchoring portions extend from the longitudinal ends of the tooth shank portions at the front edges. The anchoring portions preferably include recesses or similar elements that can be engaged by and filled with a moldable material. It is additionally preferred that the anchoring portions in the tooth shank portions are further machined on the skin-facing sides and sides thereof (with reference also to Figure 5 and Figures 15 to 18) so that they can be covered by the moldable or molded component, resulting in an overall smooth surface, with no significant steps in a transition between the anchoring portions and the tooth shank portions. It is evident that steps S14 and S12 can be combined. For example, steps S12 and S14 can be deployed via an integrated etching step.
[0115] In an additional step S16, which can be considered as an optional step, the anchoring elements or anchoring portions can be flexed relative to the tooth shank portions. The bending of the anchoring portions can further enhance the fixation of the molded material and the metal component as more space can be provided for the plastic material. There may be at least some modalities of manufacturing methods that do not require step S16.
[0116] There may then be an additional optional step S18 which may include separating a plurality of precursors to the metal component from a respective row or matrix in the supplied metal material, particularly in the supplied metal sheet material, by example, on the supplied sheet metal coil. Step S18 may involve cutting or stamping respective precursors from a respective support structure. It is worth mentioning in this regard that the S18 separation step could also alternatively occur at another stage of the manufacturing process illustrated in Figure 26. It may be considered a matter of choice to separate the metal component precursors at an early stage or a relatively later stage of the manufacturing process. Consequently, in some embodiments, the metal component of the stationary blade can be at least substantially completed in step S16 or step S18, for example.
[0117] Next, an additional step S20 may occur which may involve placing the metal component into a cavity of a molding tool. Placing the metal component can include placing the metal component in a defined orientation in the mold cavity. As already indicated above, the metal component can be placed in the mold cavity in its separate state. However, in at least some embodiments, placing a plurality of metal components in a mold comprising a respective plurality of cavities can be envisaged. The respective metal components of the plurality of metal components can be separated from each other. However, in an alternative, the metal components can be fixed to a common support structure.
[0118] With the placement of the metal component in the mold cavity, the placement of a substitute component in the mold can occur next. The substitute component may cover or fill a space in the mold cavity to define a guide slot in the stationary blade to be formed. Placing the replacement component in the mold may include placing a reusable or non-reusable replacement component in the mold. By way of example, step S22 may include inserting at least one slide into the mold cavity. The at least one slide can be arranged as a component of the molding tool. For example, the molding tool can be provided with two opposing slides that form the replacement component.
[0119] Then, an additional step S24 can occur which can be considered as molding step. In molding step S24, a moldable or molded material can be injected into the mold cavity. Step S24 can also be referred to as an injection molding step. Step S24 may involve injecting a molten plastic material into the mold cavity. Consequently, the cavity in the mold can be filled with the basically fluid plastic material. The plastic material can define a plastic component of the stationary blade to be formed. The plastic component can be joined to the metal component, particularly to the anchoring elements or anchoring portions thereof. The connection of the metal component and the plastic component may further involve engaging recessed portions in the anchoring portions with the molded plastic material. In general, step S24 can create an integrally formed composite metal and plastic stationary blade. Particularly, step S24 can be referred to as an internally supplemented molding step. The metal component can therefore be considered as the insert component. In some embodiments, step S24 can be thought of as an externally supplemented molding step. In still some additional embodiments, step S24 can be considered as an overlap molding step.
[0120] There may then be an additional step S26 which may include removing the at least one slide, if any, from the mold cavity. Consequently, the guide slit formed in the stationary blade can be cleaned. The guide slot can provide a defined coupling for a movable cutter blade to be mounted on the stationary blade.
[0121] An additional step S28 can then occur which can be considered as an optional step. Step S28 may include separating single stationary blades from a matrix or row that includes a plurality of stationary blades formed in a mold comprising a plurality of respective mold cavities.
[0122] Figure 27 illustrates an exemplary manufacturing method for a mobile cutter blade that can be configured to cooperate with a stationary blade formed and disposed in accordance with at least some aspects of the present disclosure. In a step S50, a precursor to the mobile cutter blade or a semi-finished mobile cutter blade can be provided. This may involve providing sheet metal material which may comprise a predefined array or row of a plurality of movable cutter blades to be processed. Thereafter, an additional step S52 may occur which may include forming or processing toothed leading edges of the movable cutter blade. Step S52 may also include processing relatively sharp cutting edges into respective teeth of the toothed leading edge. Step S52 may include suitable material removal processors. By way of example, step S52 may include a suitable etching step comprising forming a general tooth shape on the toothed leading edge, and forming relatively sharp cutting edges on the teeth. Thereafter, an additional step S54 may occur which may include separating respective movable cutter blades from a support structure which includes a row or an array of a plurality of movable cutter blades.
[0123] Figure 28 illustrates an exemplary manufacturing method for a set of blades that includes a stationary blade and a movable cutter blade formed in accordance with at least some aspects of the present disclosure. The method may include a step S100 which comprises providing a stationary blade. The stationary blade may be formed in accordance with the exemplary manufacturing method illustrated in Figure 26. An additional step S102 may include providing a movable cutter blade. Steps S100 and S102 can take place in parallel. Step S102 may comprise manufacturing the movable cutter blade according to the method illustrated in Figure 27. Next, a coupling or splicing step S104 can occur in which the movable cutter blade is inserted into a guide slot in the stationary blade. Inserting the movable cutter blade into the stationary blade guide slot may involve laterally inserting the movable cutter blade through a lateral opening of the stationary blade.
[0124] Next, an additional step S106 may occur which may involve introducing a transmission member 70 in the semi-finished assembly of the blade assembly. Step S106 may particularly involve inserting the transmission member 70 in an inserting direction that is different from an inserting direction of the movable cutter blade. Thereafter, an additional step S108 may occur which includes attaching the drive member 70 to the moving cutter blade 24. The step S108 may also include attaching the drive member to the moving cutter blade. Joining may involve welding, particularly laser welding. Attaching the movable cutter blade and the drive member, while both elements are positioned on the stationary blade, can lock the movable cutter blade to the stationary blade. This can be particularly beneficial as in this way no separate clamping or locking components for the movable cutter blade are required.
[0125] Although the invention has been illustrated and described in detail in the drawings and the aforementioned description, such illustration and description should be considered illustrative or exemplary, and not restrictive; the invention is not limited to the disclosed embodiments. Other variations to the disclosed embodiments may be understood and made by those skilled in the art in practicing the claimed invention in accordance with the appended claims.
[0126] In the claims, the expression "comprising" does not exclude other elements or other steps, and the indefinite article "a" or "an" does not exclude a plurality. A single element or another unit can perform the functions of several items mentioned in the claims.
[0127] No reference signs in the claims are to be construed as limiting the scope of the invention.

权利要求:
Claims (15)
[0001]
1. STATIONARY BLADE, for a set of blades (20) of a hair-cutting apparatus (10), said set of blades (20) being arranged to be moved through the hairs in a direction of movement ( 28) for cutting hair, said stationary blade (22) comprising: - a first wall portion (100) arranged to serve as a skin-facing wall when in operation, - a second wall portion (102) at least partially displaced from the first wall portion (100) so that the first wall portion (100) and the second wall portion (102) define therebetween a guide slot (96) arranged to receive a movable cutter blade ( 24), - at least one toothed leading edge (30) formed together by the first wall portion (100) and the second wall portion (102), wherein the at least one toothed leading edge (30) comprises a the plurality of teeth (36) wherein the first wall portion (100) and the second wall portion of (102) are connected at a front end of the at least one front edge (30), thus forming tips (86) of the teeth (36), characterized in that the stationary blade (22) is a stationary blade composed of metal and plastic integrally formed (22), wherein the first wall portion (100) is at least partially produced from metallic material, and wherein the second wall portion (102) is at least partially produced from plastic material.
[0002]
2. STATIONARY BLADE according to claim 1, characterized in that it comprises a metal component (40), particularly a sheet metal insert and a plastic component (38) joined to the metal component (40), wherein at least a central portion of the first wall portion (100) is formed by the metal component (40).
[0003]
A STATIONARY BLADE according to claim 2, characterized in that the metal component (40) further comprises tooth shank portions (88) comprising cutting edges (94) which are configured to cooperate with the cutting edges (84) ) of the respective teeth (82) of the movable cutter blade (24) for cutting by those which are trapped therebetween, when in operation.
[0004]
4. STATIONARY BLADE according to any one of claims 2 or 3, characterized in that the metal component (40) comprises at least one anchoring element (90), particularly at least one anchoring element by positive engagement (90) which extends from a respective tooth shank portion (88), wherein the plastic component (38) and the metal component (40) are connected to the at least one anchoring element (90).
[0005]
STATIONARY BLADE according to claim 4, characterized in that at least one anchoring element (90) is inclined with respect to a top surface (32) of the first wall portion (100), particularly flexed backwards.
[0006]
6. STATIONARY BLADE according to any one of claims 4 or 5, characterized in that at least one anchoring element (90) is T-shaped, U-shaped or O-shaped, particularly when viewed from the top.
[0007]
STATIONARY BLADE according to any one of claims 4 to 6, characterized in that at least one anchoring element (90) is displaced backwards from a top surface (32) of the first wall portion (100).
[0008]
8. STATIONARY BLADE according to any one of claims 4 to 7, characterized in that the tips (86) of the teeth (36) are formed by the plastic component (38), in which the plastic component (38) additionally engages the elements of positive engagement anchorage (90) in a mating area (106) between the tooth shank portions (88) of the metal component (40) and the tips (86) of the teeth (36).
[0009]
9. STATIONARY BLADE according to any one of claims 2 to 8, characterized in that the plastic component (38) and the metal component (40) form an integrally formed part selected from the group consisting of a molded part with an internal supplement, molded part with external insert and molded part with overlap.
[0010]
10. STATIONARY BLADE, according to any one of claims 1 to 9, characterized in that the teeth (36) of the at least one toothed anterior edge (30) comprise, when viewed in a cross-sectional plane perpendicular to the lateral direction (Y), a substantially U-shaped shape comprising a first leg on the first wall portion (100) and a second leg on the second wall portion (102), wherein the first leg (110) and the second leg (112) are integral with each other. each other at the tips of the teeth (86).
[0011]
11. BLADES ASSEMBLY, for a hair cutting apparatus (10), said blade assembly (20) being arranged to be moved through the hairs in a direction of movement (28) to cut the hairs, said set of blades (20) is characterized in that it comprises: - a stationary blade (22) as defined in any one of claims 1 to 10, and - a mobile cutter blade (24) comprising at least one toothed front edge (80), wherein said mobile cutter blade (24) is arranged to be movable within the guide slot (96) defined by the stationary blade (22) so that, upon relative movement between the mobile cutter blade (24) and the stationary blade (22), the at least one toothed leading edge (80) of the movable cutter blade (24) cooperates with the corresponding teeth (36) of the stationary blade (22) to enable the cutting of hair captured between them in a cutting action.
[0012]
12. METHOD FOR THE MANUFACTURING OF A STATIONARY BLADE COMPOUND OF METAL AND PLASTIC, of a set of blades (20) for an apparatus for cutting hair (10), characterized in that it comprises the following steps: - providing a metal component (40 ), particularly a sheet metal component (40), which forms at least substantially a central portion of a first wall portion (100), - providing a mold, particularly an injection mold, the mold defining a shape of a plastic component (38), - arranging the metal component (40) in the mold, - providing a substitute component in the mold, the substitute component being configured to keep a guide slit to be formed (96) clean of the stationary blade (22) when in molding, - forming, particularly, injection molding, the plastic component (38), wherein the plastic component (38) and the metal component (40) define a first wall portion (100 ) and a second wall portion (102) of the blade. ina stationary (22), wherein the first wall portion (100) is arranged to serve as a skin-facing wall when in operation, the second wall portion (102) being at least partially displaced from of the first wall portion (100), so that the first wall portion (100) and the second wall portion (102) together define the guide slot (96) for a movable cutter blade (24), wherein the first wall portion (100) and the second wall portion (102) together form at least one toothed leading edge (30) comprising a plurality of teeth (36), and the first wall portion ( 100) and the second wall portion (102) are connected at a front end of the at least one leading edge (30), thus forming tips (86) of the teeth (36), and - removing the replacement component from the stationary composite blade from metal and plastic (22).
[0013]
13. METHOD according to claim 12, characterized in that the step of providing the substitute component in the mold comprises at least one of the following steps: - providing at least one lateral slide in the mold defining the guide slot (96) for the movable cutter blade (24), and - arranging a separate replacement dummy component in the mold, particularly a reusable dummy component, the dummy component being removed from the stationary composite metal and plastic blade (22) out of the mold.
[0014]
14. METHOD, according to any one of claims 12 or 13, characterized in that it further comprises: - machining the metal component (40), whereby the machining of the metal component (40) comprises at least one of the formation of portions of tooth shank (88) and the formation of anchoring elements (90) in the metal component (40), and the step of machining the metal component (40) further comprises at least one process selected from the group consisting of: - cutting, particularly laser cutting, - etching, particularly electrochemical etching, - stamping, - coining, - erosion, particularly wire erosion, and combinations thereof.
[0015]
15. METHOD FOR MANUFACTURING A BLADES ASSEMBLY, for an apparatus for cutting hair (10), characterized in that it comprises the following steps: - manufacturing a stationary blade (22) according to the method as defined in any one of the claims 12-14, - providing a movable cutter blade (24) comprising at least one toothed leading edge (80) arranged to cooperate with at least one respective toothed leading edge (30) of the stationary blade (22); and - inserting the movable cutter blade (24) into the guide slot (96) of the stationary blade (22), particularly by introducing the movable cutter blade through a side opening of the stationary blade (22).

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同族专利:

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公开号 | 公开日

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JP2017512109A|2017-05-18|

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US10081114B2|2018-09-25|

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EP3131715B1|2018-03-28|

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WO2015158571A1|2015-10-22|

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PL3131715T3|2018-08-31|

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RU2680324C2|2019-02-19|

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CN105014703B|2019-06-28|

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AU2015246185B2|2019-02-28|

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BR112016023790A2|2017-08-15|

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US20170106548A1|2017-04-20|

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RU2016144806A3|2018-07-02|

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MX2016013411A|2017-01-18|

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EP3131715A1|2017-02-22|

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JP6118475B1|2017-04-19|

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RU2016144806A|2018-05-18|

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ES2672572T3|2018-06-15|

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TR201807732T4|2018-06-21|

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CN204954879U|2016-01-13|

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CN105014703A|2015-11-04|

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AU2015246185A1|2016-12-08|

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法律状态:
2020-01-14| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-04-20| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-06-22| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 08/04/2015, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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EP14165284.2|2014-04-18|

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EP14165284|2014-04-18|

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PCT/EP2015/057535|WO2015158571A1|2014-04-18|2015-04-08|Blade set, hair cutting appliance, and related manufacturing method|

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