• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    adjustment trigger for a comb with adjustable spacing of a hair trimmer, and a hair trimmer. The present invention relates to an adjustment actuator (58) of an adjustable spacing comb (26) of a hair trimming apparatus (10) and a hair cutting apparatus (10) which is provided with a comb with adjustable spacing (26). the adjustment actuator (58) comprises an actuator (60) which is configured to actuate a movable comb portion (40) of the adjustable spacing comb (26) with respect to a blade assembly (16) of the cutting apparatus of bris (10), a drive system (62) for coupling the actuator (60) and the movable comb portion (40), wherein the drive system (62) comprises a reduction gear unit (66), and a location sensing unit (80) comprising a rotary encoder (84), wherein the rotary encoder (84) is coupled to an output shaft (68) of the reduction gear unit (66).
    公开号:BR112016025870B1
    申请号:R112016025870-3
    申请日:2015-04-28
    公开日:2021-06-22
    发明作者:Geert-Jan Darwinkel；Cornelis Johannes Zandsteeg；Nicky Lewis；Matthew Gerard Nayna
    申请人:Koninklijke Philips N.V.；
    IPC主号:
    专利说明:

    field of invention
    [001] The present disclosure relates to an adjustment actuator for a comb with adjustable spacing of an apparatus for cutting hair, wherein the adjustment actuator comprises an actuator that is configured to drive a movable portion of the comb with adjustable spacing at relating to a set of blades of the hair-cutting apparatus, and a drive system for coupling the actuator and the movable comb portion, the drive system comprising a reduction gear unit. The present invention further relates to an adjustable spacing comb comprising such an adjustment driver and to a hair trimming apparatus comprising such an adjustable spacing comb. Background of the invention
    [002] Apparatus for hair cutting, particularly electrical hair cutting apparatus, are well known and may include finishing machines, hair clippers and shavers. Electric hair trimming devices may also be called electrically powered hair trimming devices. Electric hair trimming devices can be powered by an electrical energy source and/or by energy storage devices, such as batteries, for example. Electric hair trimming devices are generally used to trim or trim hair on the (human) body, in particular hair and beard, to enable an individual to look well groomed and well styled. Electric hair clippers are also often used to cut animal hair.
    [003] The document US 6,968,623 B2 discloses a hair trimmer comprising an adjustable comb, wherein the hair trimmer additionally comprises a body, a cutting head including a set of blades, wherein the comb is movable in relative to the blade assembly, an electric motor to drive the blade assembly to effect the cutting action and an actuator assembly that is capable of moving the comb relative to the blade assembly between a fully retracted position and a fully extended position, the actuator assembly comprises a comb device, a comb button connected to the comb device, the comb button being operable to adjust the comb position in relation to the blade assembly, and a movable lock button in relation to the comb button, where the lock button selectively prevents and allows movement of the comb button in relation to the body. Consequently, manual adjustment of the comb length is made possible.
    [004] The document US 7,992,307 B2 discloses a hair trimmer comprising a housing and a motor that is connected through a shaft to a motorized cutting guide, the cutting guide being driven by the motor. cutting guide is movable to a plurality of guide positions. Consequently, motorized adjustment of the length of the cutting guide (or comb) is made possible.
    [005] A comb of a hair-cutting apparatus, particularly a spaced comb, may generally be arranged as an attachable comb or an integrally formed comb. A spaced comb generally separates a set of blades from the skin hair-cutting device when the device moves in a direction of motion relative to the skin during operation. Consequently, the spaced comb can make it possible to cut hairs to a desired length, that is, to a desired length of hair remaining on the skin.
    [006] Conventional hair cutting apparatus can be provided with a set of fixing combs, each of which is associated with a different length of hair. Consequently, a user of the appliance basically needs to replace one fixation comb with another one to change the hair length. Furthermore, manually adjustable clamping combs are known, as disclosed in US 6,968,623 B2. In addition, motorized adjustment combs equipped with motor have recently been introduced, as disclosed in US 7,992,307 B2. Typically, motor-equipped adjustment combs comprise a movable portion of the comb that is movable relative to the blade assembly of the hair-cutting apparatus, the movable comb portion being coupled to an actuator, particularly an electromotor and /or to an electric propulsion system.
    [007] However, it has been observed that operating a motorized adjustment comb often presents several disadvantages. A motorized propulsion system can, for example, comprise a control unit that has the ability to control the actuator (or motor). However, the control unit needs to be provided with respective input information, in particular, with respect to a current state or position of a moving comb portion with respect to the set of blades. In other words, it may be desired to provide the control unit with absolute and/or relative (or incremental) positional information. Positional information may be indicative of an actual position of the moving comb portion. Based on the actual position, the control unit can operate the actuator to move the movable comb portion to a desired target position.
    [008] There are several approaches to detecting the position or location of the moving comb portion of the adjustable spacing comb. Direct location detection may include sensors that have the ability to directly detect the (translating) position of the moving comb portion. Consequently, these direct sensing sensors basically need to be implemented in addition to and separate from a motorized propel system for the spaced comb. Consequently, implementing a direct sensing sensor that has the ability to directly detect a (translating) position of the spaced comb with respect to the blade assembly can be costly. An alternative approach might include detection of actuator rotations or revolutions. With regard to detecting the (true) position of the spaced comb with respect to the set of blades, this approach can be called indirect location detection, as a detected signal (eg, the number of rotations or a angular movement amount) needs to be converted to a desired (longitudinal) value. Consequently, the indirect detection approach can be affected by several disadvantages, for example, relatively large deviations between a derived (or calculated) positional value and an actual positional value.
    [009] If the control unit is not aware of the actual position of the movable spaced magazine, the operation and adjustment of the spaced magazine can be even more complicated. It would therefore be advantageous to provide an adjustment actuator for a comb with adjustable spacing which comprises an improved location sensing unit which can solve at least part of the above mentioned disadvantages. It would be additionally advantageous to provide a comb with adjustable spacing and a hair trimming apparatus equipped with such a comb with adjustable spacing which can exhibit improved comb adjustment and location sensing performance. Preferably, the adjustment actuator can be operated and controlled in a highly precise and exact manner.
    [010] Thus, there is still room for improvement. Invention Summary
    [011] It is an object of the present invention to provide an apparatus for haircutting, a comb with adjustable spacing for a haircutting apparatus and an adjustment driver for such a comb with adjustable spacing that can solve at least some of the problems mentioned above . In particular, it is an objective to provide an adjustment trigger for a comb with adjustable spacing that can ensure accurate and accurate position detection and, as a consequence, precise and accurate positioning performance which can particularly include improved positioning repeatability or reproducibility.
    [012] According to a first aspect of the present disclosure, an adjustment actuator for a comb with adjustable spacing of an apparatus for hair cutting is presented, the adjustment actuator comprising: - an actuator that is configured to drive a moving comb portion of the comb with adjustable spacing in relation to a set of blades of the hair-cutting apparatus, the actuator being an electromotor, - a drive system that is configured to couple the actuator and the moving comb portion, the drive system comprising a reduction gear unit, and - a location sensing unit comprising an encoder, particularly a rotary encoder, the encoder being coupled to an output shaft of the reduction gear unit, and that the rotary encoder is configured to emit an electrical signal.
    [013] This aspect is based on the knowledge that a location signal can be detected relatively cost-effectively and at the same time accurately on the output shaft of the reduction gear unit. In general, a drive system that includes a reduction gear unit can be provided between the actuator and the moving comb portion. Generally, the reduction gear unit is required to convert the relatively high speed (rotation) of the actuator into a desired relatively low (longitudinal) setting speed of the moving comb portion. In a particular modality, the actuator can be implemented by a high-speed or high-revolution electromotor. It may therefore be required to provide a reduction gear unit comprising at least one, preferably a plurality of reduction gear stages. Consequently, a high-speed, low-torque movement provided by the actuator can be converted to a low-speed, high-torque or high-force movement to adjust the comb with spacing.
    [014] Related to the precision and accuracy of location detection, each stage of the reduction gear can be called an error source or a source of deviation. This can particularly apply when a low cost reduction unit is implemented. A low cost reduction gear unit can comprise at least one low cost gear wheel. By way of example, a low cost gear wheel can be obtained from a molding process or a casting process. For example, at least one gear wheel of the reduction gear unit can be formed of plastic material.
    [015] Consequently, one has to accept relatively large tolerances in the reduction gear unit. Typically, tolerances in the reduction gear unit can only have a minor influence on the conversion and transmission of torque or force, respectively. However, when it comes to accuracy of transmission or motion conversion (angular), tolerances, particularly gear tolerances, can have a major influence.
    [016] According to the above aspect, it is therefore proposed to couple the location detection unit, particularly the encoder thereof, to the output shaft of the reduction gear unit. Consequently, the above aspect can be considered a beneficial trade-off between the direct location sensing approach and the indirect location sensing approach as mentioned above. The tolerances of the gear stage(s) of the reduction gear unit can only have a minor influence on the detected detection values.
    [017] In general, the actuator can be operated based on the detected location values. Furthermore, an indicator unit can be provided on the hair trimming apparatus or on the comb with adjustable spacing which can indicate an actual position of the movable comb portion to a user. For this purpose, visual indicators can be used, for example, LCD screens, LED screens, distinct LED elements etc. In general, the location sensing unit can be configured to generate or to output a location or position signal which can be transmitted to a control unit and/or to a display unit of the hair trimming apparatus.
    [018] In general, the location detection unit, particularly the encoder thereof, can be coupled to the drive system of the adjustment trigger in a position "downstream" from it. This may imply that the encoder need not necessarily be coupled to the last gear stage of the reduction gear unit. By way of example, the output shaft to which the encoder is coupled may be arranged to engage with an additional element, for example a gear wheel on a translating element which is arranged on or is coupled to the comb with adjustable spacing. It is generally preferred to couple the encoder to a rotary gear stage further downstream, more preferably as far downstream as the tuning driver. It is generally preferred that the encoder of the location sensing unit is a rotary encoder which is capable of detecting rotations of an encoder rod with respect to a location reference, for example an encoder housing.
    [019] In one mode of the tuning actuator, the actuator is a high-speed electromotor, wherein the reduction gear unit comprises at least one reduction gear stage, particularly at least one reaction-affected gear stage. Conventional gear stages, particularly low cost gear stages, can generally exhibit a certain amount of reaction. Reducing or eliminating gear feedback typically requires relatively expensive measures. By coupling the encoder of the location sensing unit to the output shaft of the reduction gear unit, all (or at least a substantial portion of) reaction in the reduction gear unit can be bypassed. Any reaction in the reduction gear unit does not influence the spot detection accuracy and precision. Typically, the reduction gear unit may be called a multi-stage gear unit which comprises two, three, four or even more reduction gear stages. Consequently, tolerances and/or gear reaction of any stage would add up to a total gear reaction or gear tolerance. It is therefore beneficial not to rely on sensing position or angular movement at the actuator level, for example by coupling a respective detector or encoder to an actuator output shaft.
    [020] In yet another embodiment, the output shaft of the reduction gear unit comprises a first toothed section and a second toothed section, wherein the first toothed section is arranged to be coupled to the movable comb portion, and wherein the second toothed section is arranged to be coupled to the encoder. Both the first toothed section and the second toothed section of the output shaft may form an output portion thereof. Accordingly, the encoder may comprise an encoder input shaft comprising at least one detector gear wheel which is arranged to be coupled to or to engage with the second toothed section of the output shaft of the reduction gear unit. According to this modality, the output rod may have the ability to drive both the moving comb portion and the encoder (input rod).
    [021] According to yet another modality of the adjustment actuator, the output shaft of the reduction gear unit is arranged to be coupled to a translation movement element to drive the movable comb portion, particularly a translational helical element or a twisted toothed element. In other words, the translation movement element can be arranged as a lead-in thread or a threaded spindle, particularly a small pitch spindle. In general, the translating element may be configured for engagement, particularly interlocking engagement, with a respective toothed section of the output shaft of the reduction gear unit. For that purpose, the translation movement element may comprise a cogwheel or a cogwheel portion.
    [022] It may be additionally preferred that, in this context, the translation movement element comprises a main extension direction that is inclined with respect to a longitudinal extension direction of the output rod. In general, a comb adjustment movement direction with adjustable spacing can be slanted with respect to a general longitudinal elongation direction of a housing portion of the hair cutting apparatus. Consequently, it may be preferable that, in addition, the translation movement element and the reduction gear unit and/or the actuator are inclined towards each other. In this way, an actuator output stem and the reduction gear unit output stem can be substantially parallel, at least in some embodiments.
    [023] It may, however, be additionally preferred that the output shaft of the reduction gear unit comprises a crown gear or bevel gear section and a sprocket gear section, wherein the crown gear section or of bevel gear is arranged to be coupled to the movable comb portion, and wherein the sprocket gear section is arranged to be coupled to the encoder. This mode can be further developed as the crown gear or bevel gear section and the sprocket gear section are arranged to engage their respective equivalent gear sections which are associated with the movable comb portion and the encoder with low reaction, particularly low spin reaction.
    [024] In the translating element that is coupled to the movable comb portion, a respective bevel gear section can be provided, which is arranged to engage with the crown gear or bevel gear section of the output shaft. On the detector or input shaft of the encoder, a sprocket gear section may be provided which is arranged to engage with the sprocket gear section of the output shaft. Consequently, the output rod and detector rod can be basically parallel to each other.
    [025] In yet another modality of the adjustment trigger, the location sensing unit further comprises a detector rod that is arranged between the output rod and the encoder. As already indicated above, the detector rod may comprise a toothed section which is arranged to engage with an equivalent toothed section on the output rod of the reduction gear unit.
    [026] In yet another modality of the tuning trigger, the encoder is a high resolution rotary encoder. Preferably, the encoder is capable of detecting angular signals at a minimum angular resolution of at least 9° (degrees). More preferably, the encoder is capable of detecting angular signals at a minimum angular resolution of at least 5°. Consequently, an actual position of the moving comb portion can be accurately detected even though the encoder is not directly coupled to the moving comb portion.
    [027] In general, the encoder can be configured to detect angular motion, angular velocity and/or angular acceleration. Consequently, positioning speed, positioning distance, target positions, etc. can be detected. The encoder is configured to output an electrical signal. The electrical signal can take the form of an analog signal or a digital signal. The encoder can be arranged as an absolute encoder or an incremental encoder. The encoder can be arranged as an optical encoder and/or a capacitive encoder, for example.
    [028] By way of example, when the encoder is arranged as an absolute encoder, a different rotation angle of the output rod can be associated with a different absolute position of the movable portion of the comb in relation to the set of blades. It is worth mentioning in this sense that the encoder can be arranged as a single-turn encoder or a multi-turn encoder.
    [029] In yet another embodiment, the encoder can be arranged as an incremental encoder. In other words, the encoder can be arranged as a relative encoder. An incremental encoder can be configured to detect incremental (rotary) position changes of the output rod. Consequently, incremental changes in the position of the movable portion of the comb can consequently be detected. It also goes without mentioning that a combination of absolute or incremental spin detection can be used by the encoder and a respective control unit.
    [030] In yet another embodiment, the adjustment actuator further comprises a control unit that is coupled to the actuator and the encoder, wherein the control unit is arranged to operate the actuator based on location signals that represent a real position of the moving comb portion detected by the location sensing unit. Consequently, a target position for the moving comb portion can be defined on the basis of precisely detected actual position values. Tolerances and/or gear reaction have no major influence on operating and control accuracy.
    [031] The above modality can be further detailed as the control unit has the ability to operate the adjustment driver so that the moving comb portion is precisely adjustable, in which minimum incremental length adjustment steps achieved are in range ranges from about 0.1 mm to about 0.5 mm (millimeter). In other words, the adjustment trigger can be called fine adjustment trigger which provides high precision position detection and adjustment of the moving comb portion. In addition, the trim trigger can allow repeatable and/or reproducible trim operations and measurements.
    [032] It is additionally preferred that, in this context, the adjustment driver has the ability to adjust the moving comb portion with high overall repeatability, wherein the overall length adjustment repeatability is in a range of about 0.1 mm to about 0.5 mm.
    [033] In yet another embodiment, the reduction gear unit is a low cost reduction gear unit, wherein at least some wheels or gears of the reduction gear unit are at least partially produced of plastic material. For example, gears can be formed through injection molding. In general, gears can be formed through a molding process. Molding can include injection molding, high pressure die casting (of metallic material) and sintering (of metallic material). Low cost gears can also be obtained from metal cutting processes, particularly from blank finishing processes.
    [034] According to another aspect of the present disclosure, a comb with adjustable spacing for an apparatus for cutting hair is disclosed, wherein the comb with adjustable spacing comprises a movable portion of the comb that is movable with respect to a portion of housing the hair-cutting apparatus and an adjustment actuator in accordance with at least some embodiments of the present disclosure. The movable portion of the comb may comprise a plurality of teeth of the comb that can divide and guide the hairs when the hair-cutting apparatus, including the comb with adjustable spacing, is moved through the hairs to cut them to a selected length. In general, the comb with adjustable spacing may be arranged as a comb with attachable and detachable spacing which can be attached to and released from the housing portion of the hair trimming apparatus, if required. Alternatively, the adjustable spacing comb may be arranged as an integrally provided spacing comb which forms an integrated part of the hair trimming apparatus. In other words, such a comb with integrated adjustable spacing may not be removed or released from the housing portion of the hair trimmer.
    [035] According to yet another aspect of the present disclosure, an apparatus for cutting hair, particularly a hair finishing or trimming machine, is disclosed, wherein the apparatus for cutting hair comprises a housing portion, a hair unit. cutting, including a blade assembly, and an adjustable spacing comb, in accordance with at least some of the embodiments of the present disclosure. In general, the hair-cutting apparatus can be considered as an electrically motor-equipped hair-cutting apparatus. Consequently, a motor can be provided to drive the set of blades. Generally, the blade assembly may comprise a stationary blade and a mobile blade, the mobile blade being movable relative to the stationary blade. The movable blade can be driven relative to the stationary blade, particularly oscillatingly driven. The movable blade and the respective stationary blade may comprise cutting edges which can cooperate to cut the hairs.
    [036] In general, the hair-cutting apparatus may comprise an elongated housing comprising a first end and a second end that is opposite the first end. At the first end of the housing, a cutting head can be arranged. The second end of the housing may also be called the cable end. Brief description of the drawings
    [037] These and other aspects of the revelation will be evident and will be elucidated with reference to the modalities described below. In the following drawings:
    [038] Figure 1 shows a schematic perspective view of an exemplary electrical apparatus for hair cutting and a comb with adjustable spacing for the apparatus for hair cutting, the comb with spacing being shown in a removed state;
    [039] Figure 2 shows a partial exploded perspective view of another embodiment of an electric hair-cutting apparatus and a comb with adjustable spacing, the spacing comb being shown in an insertion orientation;
    [040] Figure 3 is a schematic perspective view of yet another embodiment of a hair cutting apparatus equipped with an adjustable comb, wherein the hair cutting apparatus is held by a user who can operate a control element to comb length adjustment;
    [041] Figure 4 is a schematic perspective view of yet another embodiment of a hair-cutting apparatus equipped with a comb with adjustable spacing, wherein the hair-cutting apparatus is held by a user who can operate an element of control for operating an adjustment trigger for the spaced comb, wherein the control element is different from a respective control element shown in Figure 3;
    [042] Figure 5 shows a simplified top view of a modality of an apparatus for cutting hair equipped with a comb with adjustable spacing and an adjustment actuator for the comb with spacing;
    [043] Figure 6 shows a schematic top view of one embodiment of a hair-cutting apparatus provided with a comb with adjustable spacing and an adjustment actuator for adjusting the comb with spacing; and
    [044] Figure 7 shows another simplified top view of yet another modality of an apparatus for hair cutting provided with a comb with adjustable spacing and an adjustment actuator for the comb with spacing; Detailed Description of Modalities
    [045] Figure 1 shows a schematic perspective view of a lint-cutting apparatus 10, particularly an electrically operated lint-cutting apparatus 10. . The pile cutting apparatus 10 may comprise a housing or housing portion 12 having a generally elongated shape. At a first end thereof, a cutting unit 14 can be provided. The cutting unit 14 may comprise a blade assembly 16. The blade assembly 16 may comprise a movable blade and a stationary blade that can move with each other to cut hair. At a second end of the housing portion 12, a handle or handle portion 18 can be provided. A user can squeeze or hold the housing on the handle portion 18.
    [046] The hair trimming apparatus 10 may additionally comprise operator controls. For example, an on-off switch or button 20 can be provided. In addition, a length adjustment control 22 may be provided in housing 12 of the hair-cutting apparatus 10. The length adjustment control 22 may be provided if an adjustable spacing comb 26 is attached to the housing portion 12 of the apparatus. for hair cutting 10. In Figure 1, the adjustable spacing comb 26 is shown in a removed or released state. When the spaced comb 26 is removed from the pile cutting apparatus 10, a minimum cut length can be obtained. When the spacing comb 26 is attached to the pile cutting apparatus 10, the piles can be cut to a desired length.
    [047] Figure 2 shows a schematic perspective illustration of a first end of a housing portion 12 of a haircutting apparatus 10. In addition, an adjustable spacing comb 26 is shown in an insertion orientation as to with respect to housing portion 12. Housing portion 12 and adjustable spacing comb 26 are shown in an exploded state. By way of example, the spaced comb 26 may comprise a fastening portion 28 which may comprise, for example, sliding supports 34-1, 34-2. The fastening portion 28 can engage the housing portion 12. More particularly, the fastening portion 28 can be attached to a mounting portion 30 of the housing portion 12. To that end, the sliding supports 34-1, 34-2 can be inserted into respective mounting slots 38-1, 38-2 in mounting portion 30. The fastening portion 28 may further comprise at least one engaging member 36 which can be provided on at least one of the sliding supports 34-1 , 34-2, for example. The engaging member 36 can hold the spaced comb 26 in its assembled state.
    [048] As can be further seen in Figure 2, the spaced comb 26 may further comprise a toothed portion 32 including a plurality of teeth of the comb. In general, the toothed portion 32 may comprise a slot in which the blade assembly 16 may be disposed in the fixed state.
    [049] With additional reference to Figures 3 and 4, exemplary modalities of pile cutting apparatus 10 are illustrated that are equipped with a respective comb with adjustable spacing 26. Figures 3 and 4 show perspective views of pile cutting apparatus 10 in a user-held state. The pile trimming apparatus 10 may further comprise an adjustment actuator for the comb with adjustable spacing 26 (not shown in Figures 3 and 4). The user can actuate the trim trigger by operating the length trim control 22.
    [050] In general, the comb with adjustable spacing 26 or more particularly a movable comb portion 40 (refer to Figure 4) thereof can be moved with respect to the blade assembly 16 of the hair-cutting apparatus 10 (refer to Figure 1) to set a distance between the adjustable spacing comb 26 and the blade assembly 16. By way of example, the movable spacing comb 26 can be withdrawn or retracted in a generally longitudinal direction indicated in Figures 3 and 4 by a double arrow denoted by reference numeral 46. The comb with spacing 26 shown in Figure 3 is in a retracted state. Figure 4 illustrates a retracted state and an extracted state of the movable comb portion 40 of the spaced comb 26. A respective extracted state of the movable comb portion 40' is indicated in Figure 4 by dashed lines.
    [051] As seen in Figure 3, the user can actuate the length adjustment control 22 in a basically lateral direction to cause a 26-spaced comb adjustment movement. A double arrow denoted by reference number 48 indicates the lateral operating direction. Figure 4 illustrates a differently shaped length adjustment control 22. By way of example, the length adjustment control 22 may be rotatably disposed in the housing portion 12 of the hair cutting apparatus 10. Consequently, the user can rotate or may rotate the length adjustment control 22 around an axis of rotation 50, also with reference to a double curved arrow denoted by reference number 52 in Figure 4. By actuating or operating the length adjustment control 22, the user can control the adjustment trigger for the adjustable spacing comb 26 to set or adjust a desired cut length.
    [052] With further reference to Figures 5, 6 and 7, will be illustrated and further described illustrative modalities of apparatus for cutting hair 10 that are equipped with adjustment actuators for a comb with adjustable spacing. In Figures 5, 6 and 7, a respective housing portion 12 of the pile cutting apparatus 10 is indicated by dashed lines. Consequently, the internal components of the pile cutting apparatus 10 are visible. In general, the adjustment actuators 58 are at least partially housed in or covered by the housing portion 12.
    [053] It is also worth mentioning in this sense that these views shown in Figures 5, 6 and 7 do not necessarily represent the same arrangement or modality. Figure 5 shows a schematic top view of a hair cutting apparatus 10 equipped with a comb with adjustable spacing 26. Figure 6 shows a schematic side view of a hair cutting apparatus 10 equipped with a comb with similar adjustable spacing 26. , wherein a respective movable comb portion of the spaced comb 26 is shown in Figure 6 in a retracted state (reference number 40) and in an extracted state indicated by dashed lines (reference number 40'). Figure 7 shows a further schematic top view of a hair trimming apparatus 10 which is equipped with an adjustable spacing comb 26.
    [054] With specific reference to Figure 5, the adjustable spacing comb 26 is further described. The adjustable spacing comb 26, also referring to Figures 1 and 2, may comprise sliding supports 34 which can cooperate with a device 42 which is movably disposed in the housing portion 12. In general, a snap-in assembly of the supports sliders 34 on device 42 can be provided. At least a substantial portion of the spaced comb 26 can be considered a movable portion of the comb 40. As best seen in Figure 5, the movable portion of the comb 40 can be coupled to the device 42 and consequently displaced with the device 42. driving the device 42 and the movable portion of the comb 40, an engaging member 44 may be provided which is coupled to the device 42. To operate or drive the movable portion of the comb 40 with respect to the blade assembly 16 (or the housing 12), an adjustment actuator 58 may be provided which may also be called an adjustment propulsion system. In other words, the tuning actuator 58 can be considered a motorized tuning actuator 58.
    [055] The adjustment actuator 58 may comprise an actuator 60, or more particularly, an electromotor. The actuator 60 may be coupled to a drive system 62. The drive system 62 may comprise a gear reduction unit 66 which is coupled to an actuator output shaft 64. The gear reduction unit 66 may comprise a plurality of gear stages, also with reference to Figure 7. The reduction gear unit 66 may comprise an output shaft 68. On the output shaft 68, a drive gear 70 may be arranged. The drive gear 70 may be coupled to a translating element 54 which is configured to engage the engaging member 44 of the device 42. By way of example, the translating element 54 may be arranged as a spindle element or a rack element. In general, the translation movement element 54 can be arranged to convert a rotary input movement applied by the drive gear 70 of the output rod 68 of the reduction gear unit 66 into a longitudinally adjusting movement of the movable comb portion 40 , with reference to double arrow 46 in Figures 5, 6 and 7.
    [056] By way of example, the translation movement element 54 may comprise a driveable gear wheel 72 that can be configured to engage the drive gear 70, also with reference to Figure 6. In some embodiments, the drive element the translation movement 54 can be slanted with respect to the output shaft 68 of the reduction gear unit 66, as can best be seen in Figure 6. This can improve the handling of the hair trimming apparatus 10 since, Accordingly, the housing portion 12 can be comfortably shaped for the user, providing a suitable ergonomic design. As can be seen from Figure 6, the overall extent of housing portion 12 may be slightly curved or banana-shaped.
    [057] In general, the drive gear 70 of the output rod 68 of the reduction gear unit 66 can be further coupled to a location sensing unit 80. Consequently, an actual position of the moving comb portion 40 can be detected at a position downstream of the drive system 62. Consequently, gear reaction and/or tolerance effects in the reduction gear unit 66 can only have a minor influence on the detection accuracy. To couple the output rod 68 and the location sensing unit 80, the drive gear 70 of the output rod 68 can be arranged to engage the translation movement element 54 and the location sensing unit 80. To this end, the drive gear 70 can comprise a first toothed section 74 and a second toothed section 76. The first toothed section 74 can be arranged as a bevel gear section. The first sprocket section 74 can engage the drive gear 72. In general, the drive gear 72 and the first sprocket section 74 can form a bevel gear assembly that can cover or span an angular displacement between the output shaft 68 of the unit. of reduction gear 66 and the translation movement element 54.
    [058] The drive gear 70 of the reduction gear unit 66 may further comprise a sprocket gear disposed in the second sprocket section 76. The second sprocket section 76 can engage a corresponding detector gear wheel 82 disposed in a detector rod 90 of the location sensing unit, also with reference to Figure 7.
    [059] In some embodiments, the adjustment actuator 58 can be arranged so that both the drive gear 72 of the translation movement element 54 and the detector gear wheel 82 of the detector rod 90 can engage with the same toothed section. of drive gear 70. This may involve an axial overlap between drive gear 72 and detector gear wheel 82. Since detector gear wheel 82 and drive gear 72 basically engage with the same drive gear 70, an actual position of the moving comb portion 40 can be detected almost directly. As well as the modalities shown in Figures 5, remaining main gear tolerances or a gear reaction that can occur at respective contacting or engagement portions downstream of the reduction gear unit can influence the location sensing accuracy.
    [060] As best seen in Figures 5 and 7, the location sensing unit 80 may comprise an encoder 84 which may comprise a detector rod 90 which is rotatable with respect to a stationary sensing portion of the encoder 84. Detector gear wheel 82 may be fixedly attached to detector rod 90. By way of example, encoder 84 may comprise a Hall effect sensor or a similar common rotation sensor.
    [061] The encoder 84 can generate an output signal that is indicative of an actual position of the moving comb portion 40. The data signal can be transferred to a control unit 86. The control unit 86 can process the respective signal . By way of example, control unit 86 may be further coupled to length adjustment control 22 illustrated in Figures 1, 3 and 4. Control unit 86 may be additionally coupled to actuator 60 of adjustment actuator 58. the actuator 60 can be operated based on the positional information detected by the location sensing unit 80. To that end, respective signal lines 92, 94 can be arranged between the encoder 84, the control unit 86 and the actuator 60, respectively.
    [062] Figure 7 illustrates an additional embodiment of an adjustment actuator 58 for a comb with adjustable spacing 26. More particularly, Figure 7 further details an exemplary embodiment of a drive system 62 of the adjustment actuator 58. reduction gear 66 of drive system 62 can be arranged as a multistage reduction gear unit.
    [063] In general, the actuator 60 can be arranged as a high speed motor. Consequently, a considerably high gear ratio may be required to convert the high-speed rotary motion of the actuator 60 into a relatively low-speed motion of the moving-spaced comb which may involve a corresponding force or torque conversion.
    [064] As can be seen in Figure 7, the output stem or actuator stem 64 of the actuator 60 can be coupled to a gear first stage 98, particularly a reduction gear first stage. The first gear stage 98 can be coupled to a second gear stage 100. The second gear stage 100 can be coupled to a third gear stage 102. The third gear stage 102 can be coupled to a fourth gear stage 104 The fourth gear stage 104 can be coupled to a fifth gear stage 106. The output shaft 68 of the reduction gear unit 66 can be coupled to the fifth gear stage 106. Each of the gear stages 98, 100, 102, 104, 106 can be arranged as a reduction gear assembly. It is worth mentioning that, in this regard, the reduction gear unit 60 mod shown in Figure 7 is a more exemplary modality. In other words, different configurations and different numbers of gear stages can be provided in the reduction gear unit 66.
    [065] In general, the reduction gear unit 66 can be arranged as a multistage low reduction gear unit. Consequently, at each of the gear stages of the reduction gear unit 66, tolerances and/or gear reaction can occur. Gear reaction and tolerances can be added to a gear reaction or tolerance value. Therefore, it is beneficial to couple the location sensing unit 80 to the output rod 68. This can have the additional advantage that at least some of the gear stages 98, 100, 102, 104, 106 or at least some of the wheels of gears thereof can be arranged as low cost components. Typically, low cost gear components are affected by significant gear reaction and/or poor gear accuracy. Since the location sensing unit 80 is coupled to a downstream component of the reduction gear unit 66, these inaccuracies can have no bearing on the accuracy and accuracy of the location sensing.
    [066] Although the invention has been illustrated and described in detail in the drawings and in the aforementioned description, such illustration and description are to 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 from a study of the drawings, the disclosure and the appended claims.
    [067] 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. The mere fact that certain measures are mentioned in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
    [068] No reference signs in the claims are to be construed as limiting the scope of the invention.
    权利要求:
    Claims (14)
    [0001]
    1. ADJUSTMENT DRIVER FOR A COMB WITH ADJUSTABLE SPACING OF A HAIR CUTTING APPARATUS, comprising: - an actuator (60) which is configured to drive a movable comb portion (40) of the comb with adjustable spacing (26) in relation to a set of blades (16) of the apparatus for cutting hair (10), the actuator (60) being an electromotor, - a drive system (62) which is configured for coupling the actuator (60) and the portion of moving comb (40), the drive system (62) comprising a reduction gear unit (66), and the adjustment drive is characterized in that: - a location detection unit (80) comprising a rotary encoder (84), wherein the rotary encoder (84) is coupled to an output shaft (68) of the reduction gear unit (66), and wherein the rotary encoder (84) is configured to output an electrical signal.
    [0002]
    2. ADJUSTMENT DRIVER according to claim 1, characterized in that the actuator (60) is a high-speed electromotor, and in which the reduction gear unit (66) comprises at least one reduction gear stage (98, 100, 102, 104, 106), particularly at least one gear stage affected by reaction (98, 100, 102, 104, 106).
    [0003]
    3. ADJUSTMENT DRIVER according to one of claims 1 or 2, characterized in that the output shaft (68) of the reduction gear unit (66) comprises a first toothed section (74) and a second toothed section (76), wherein the first toothed section (74) is arranged to be coupled to the movable comb portion (40), and wherein the second toothed section (76) is arranged to be coupled to the rotary encoder (84).
    [0004]
    4. ADJUSTMENT DRIVER according to any one of claims 1 to 3, characterized in that the output rod (68) of the reduction gear unit (66) is arranged to be coupled to a translation movement element (54) to drive the movable comb portion (40), particularly a helical translational element or a toothed rack element.
    [0005]
    ADJUSTMENT DRIVER according to claim 4, characterized in that the translation movement element (54) comprises a main extension direction that is inclined relative to a longitudinal extension direction of the output shaft (68).
    [0006]
    6. ADJUSTMENT DRIVER according to any one of claims 3 to 5, characterized in that the output shaft (68) of the reduction gear unit (66) comprises a crown gear or bevel gear section (74) and a sprocket gear section (76), wherein the crown gear or bevel gear section (74) is arranged to be coupled to the movable comb portion (40), and the sprocket gear section (76) ) is arranged to be coupled to the rotary encoder (84).
    [0007]
    7. ADJUSTMENT DRIVER according to claim 6, characterized in that the crown or bevel gear section (74) and the sprocket gear section (76) are arranged to engage their respective equivalent gear sections (72, 82) which are associated with the moving comb portion (40) and the rotary encoder (84) with little reaction.
    [0008]
    8. ADJUSTMENT DRIVER according to any one of claims 1 to 7, characterized in that the location detection unit (80) additionally comprises a detector rod (90) which is arranged between the output rod (68) and the encoder swivel (84).
    [0009]
    SETTING DRIVER according to any one of claims 1 to 8, characterized in that the rotary encoder (84) is a high resolution rotary encoder, particularly a rotary encoder (84) which has the ability to detect angular signals at a resolution minimum angle of at least 9° (degrees).
    [0010]
    10. ADJUSTMENT DRIVER according to any one of claims 1 to 9, characterized in that it additionally comprises a control unit (86) which is coupled to the actuator (60) and the rotary encoder (84), in which the control unit (86) is arranged to operate the actuator (60) based on location signals representing an actual position of the moving comb portion (40) detected by the location sensing unit (80).
    [0011]
    11. ADJUSTMENT DRIVER according to claim 10, characterized in that the control unit (86) has the ability to operate the adjustment drive (58) so that the movable comb portion (40) is precisely adjustable, wherein the incremental length adjustment steps achieved are in the range of about 0.1 mm to about 0.5 mm.
    [0012]
    12. ADJUSTMENT DRIVER according to one of claims 10 or 11, characterized by having the ability to adjust the moving comb portion (40) with high overall repeatability, in which the overall length adjustment repeatability is in the range of about from 0.1 mm to about 0.5 mm.
    [0013]
    13. ADJUSTMENT DRIVER according to any one of claims 1 to 12, characterized in that the reduction gear unit (66) is a low cost reduction gear unit (66), in which at least some gears of the reduction gear (66) are at least partially produced from plastic material.
    [0014]
    14. APPARATUS FOR CUTTING HAIR, particularly a trimmer or hair cutter, characterized in that it comprises a housing portion (12), a cutting unit (14) which includes a blade assembly (16), and a comb with adjustable spacing. (26) which comprises a movable comb portion (40) which is movable with respect to a housing portion (12) of the lint-cutting apparatus (10), and an adjustment actuator (58) as defined in any one of claims 1 to 13.
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    同族专利:
    公开号 | 公开日
    JP6458053B2|2019-01-23|
    RU2016148206A|2018-06-09|
    WO2015169633A1|2015-11-12|
    CN106457581A|2017-02-22|
    JP2017515570A|2017-06-15|
    CN106457581B|2018-12-28|
    RU2016148206A3|2018-10-23|
    RU2676370C2|2018-12-28|
    EP3140089B1|2019-04-10|
    EP3140089A1|2017-03-15|
    US20170057105A1|2017-03-02|
    US10040208B2|2018-08-07|
    TR201909013T4|2019-07-22|
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    法律状态:
    2020-01-28| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-01-26| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2021-04-13| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    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 28/04/2015, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP14167685.8|2014-05-09|
    EP14167685|2014-05-09|
    PCT/EP2015/059111|WO2015169633A1|2014-05-09|2015-04-28|Adjustable spacing comb, adjustment drive and hair cutting appliance|
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