• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    18 ABSTRACT The present invention relates to a hand held cutting device, comprising a main body (6)Which comprises a handle (62) and a cutting head (63), further the cutting devicecomprises a cutting element (4) attached to said cutting head (63), a guiding andsupporting element (2A, 2B) extending from said cutting head (63), said guiding andsupporting element (2A, 2B) and cutting head (63) being arranged to form a protectingperiphery such that any part of a cutting edge (4A) of said cutting element (4) does notprotrude outside of said periphery, said guiding and supporting element (2A, 2B)including a distal portion (20) arranged to form a feed channel (64) together With aportion (60) of said handle (62) and a support device (1) arranged on said guiding andsupporting element (2A, 2B), Which support device (l) is arranged to interact With saidcutting edge (4A) to improve cutability, and said cutting element (4) is arranged to benone rotatably, fixedly attached to said cutting head (63), by means of a locking device(42, 43) that provides for re-positioning and thereby reneWing of said cutting edge (4a)and that said support device (l) is arranged With a portion (lA) made of a softermaterial than the material of said cutting edge (4A) to form a fixed recess (lB)interacting With said cutting edge (4A) Wherein said main body (6) comprises two tool parts (6A, 6B) With said cutting element (4) being arranged in between
    公开号:SE1250598A1
    申请号:SE1250598
    申请日:2012-06-08
    公开日:2013-12-09
    发明作者:Martin Bergstrand；Bjoern Aahlen
    申请人:Es Equipment Ab；
    IPC主号:
    专利说明:

    HAND-HELD CUTTING DEVICE FIELD OF THE INVENTION The present invention relates to a hand held cutting device, comprising a main bodyWhich comprises a handle and a cutting head, fiarther the cutting device comprises acutting element attached to said cutting head, a guiding and supporting elementextending from said cutting head, said guiding and supporting element and cutting headbeing arranged to form a protecting periphery such that any part of a cutting edge ofsaid cutting element does not protrude outside of said periphery, said guiding andsupporting element including a distal portion arranged to form a feed channel togetherWith a portion of said handle and a support device arranged on said guiding andsupporting element, Which support device is arranged to interact With said cutting edgeto improve cutability, and said cutting element is arranged to be none rotatably, f1xedlyattached to said cutting head, by means of a locking device that provides for re-positioning and thereby reneWing of said cutting edge and that said support device isarranged With a portion made of a softer material than the material of said cutting edge to form a fixed recess interacting With said cutting edge.
    BACKGROUND INFORMATION In accident situations With a suspected injury it could be very important to liberate avictim of the accident from his clothes for diagnosis purposes or instantaneoustreatment. Additionally, When there is e. g. exposure to dangerous chemicals it couldalso be very important to liberate the victim from his clothes if they have been soaked With such chemicals.
    Also in other applications and situations there are of great importance to quickly releasesomeone or something. For example, horsemen needs to fast and safely cut a horseloose When the horse is in panic or in an easy Way cut a horse loose from a snaffle, a halter, a girth for example When nailed in e.g. a Wire fence.
    Even in other cutting situations there are a need for a safe and easy cutting tool e.g.When cutting rugs, carpets, mats, and other fabrics and Work pieces as Well. In the sportenvironment there is also a need for quickly removing e. g. tape and bandages. Anotheruse is for rapid severing of a safety or seat belt of a motor vehicle to release a passenger there from in the event of an emergency.
    Cutting devices for one or the other of the above mentioned purposes are previouslyknown. US 4,63l,829 for instance describes a holder for a conventional single-edgerazor blade used to cut thin, elongated articles. The cutting edge of the blade isprotected except for a portion thereof, which is exposed at the end of a guide slot in theholder. The blade is replaceable without tools and is reversible to use portions of bothends. One of the disadvantages of this holder is that the blade has to be dismountedwhen shifting to a new edge on the same blade. Additionally there is only two possible positions for the blade which gives only two fresh independent cutting edges per blade.
    Another similar cutting device is known from US 2,537,287. Also in this device theblade is replaceable without tools and is reversible to use portions of both ends. The disadvantages of this device of the same as listed above.
    The patent specification US 3,673,687 describes a bandage cutter and more particularlythe cutter for removing the tape that is routinely applied to the wrists and ankles ofathletes. This cutting device is provided with a cutting element of special andcomplicated design. The cutting element can be dismounted without using any tools butthere is no possibility to shift the position of the element in order to expose and newfresh portion of the cutting edge.
    US 7,624,507 describes a hand held cutting device developed by the applicant which isadapted for cutting textile material of different types, particularly cutting off clothes of avictim of an accident,. The cutting device has a design that makes the use of the cuttingdevice safe for both the user and the victim. The cutting element may be rotated toprovide the cutting device with a new edge on the cutting element or be replacedwithout using any tools.
    From the prior art there is also known a cutting device having a cutting element in theform of a free rotating circular disc which co-operates with an opposed free roller fixedon a pivoting arm. By means of an adjustment mechanism the position of said arm andthereby the roller in relation to the cutting element can be set. The work piece to be cutpasses between the cutting element and the roller. An essential disadvantage with thisdevice is of course the complicated design with several moving elements andadjustment needs. Additionally, the efficiency of the device is poor due to the rotating movement of the cutting element.
    SUMMARY OF THE INVENTION The cutting device according to the invention Which so lves the problems With thedevices according to the prior art is especially designed to handle textile material ofdifferent types, also in several layers, as Well as e.g. leather, rubber, belts and plastic/metal zippers. At the same time it is, due to its design, very safe for the user.
    One object of the invention is to provide a cutting device having at least three,preferably at least five possible positions for the associated cutting element Which gives fresh independent cutting edges.
    Another object of the invention is to provide a cutting device making it possible to shiftto a new edge on the same cutting element Without tools and Without dismounting thecutting element from the cutting head Which reduces the risk of injuries to the operator and damages to the cutting element itself A further object is to provide a cutting device making it possible to replace the cutting element Without tools.
    A still further object is to provide a cutting device Without moving parts. Non rotatingcutting edge in most situations provides a more efficient cutting operation than a rotatable cutting edge.
    A still further object is to provide a cutting device having a support surface for theWorkpiece Which is easily exchangeable Without tools making it possible to design afeed channel for the Work piece optimising the cutting characteristics of the cuttingdevice for any particular material and environment. A non-rotating, interactive supportsurface in mo st situations provides a more efficient cutting operation than a rotatable support surface.
    A still further object is to provide a cutting device making it possible to change the type,especially the form (polygonal) of the cutting element Without making other changes to the cutting device.
    A still further object is to provide a cutting device giving an indication inforrning When to replace the cutting element.
    A still further object is to provide a cutting device eliminating the risk of clogging during the cutting procedure.
    A still further object is to provide a cutting device presenting an active cutting edgehaving an instantaneous decrease of the cutting angle in the feeding direction increasing the cutting efficiency for certain materials.
    A still further object is to provide a cutting device presenting an ergonomic design.
    The present invention, which provides a solution to the said technical problems, is characterised according to the appended claims.
    BRIEF DESCRIPTION OF THE DRAWINGSOther objects, uses and advantages of this invention will be apparent from the readingof this description which proceeds with reference to the accompanying drawings forming part thereof and wherein: Figure 1 shows a side view of a preferred embodiment of the cutting deviceaccording to the invention, Figure 2 shows an exploded view of the same embodiment of the invention, Figure 3 shows a perspective view of the cutting head according to a preferred embodiment of the invention, Figure 3A shows a part of the cutting device in section along the line marked II-II in figure 3, Figure 4 shows a side view of the cutting device corresponding to a view from theleft in figure l, Figure 5 shows the cutting device in section along the line marked I-I in figure 1, Figure 6 shows an exploded view of an altemative embodiment according to theinvention, and Figure 7 shows an exploded view of an altemative embodiment of the invention.
    DETAILED DESCRIPTION OF THE INVENTIONThe following detailed description, and the examples contained therein, are provided forthe purpose of describing and illustrating certain embodiments of the invention only and are not intended to limit the scope of the invention in any way.
    Figure 1 shows a side view of a preferred embodiment of a cutting device according to the invention.
    The cutting device according to the invention comprises a main body 6 integrating ahandle 62 and a cutting head 63 extending from the front end of the handle. At the rearend of the handle a glide stop 7 is arranged at the underside for making the grip moresecure when pulling. The main body 6 comprises two similar tool parts 6A, 6B that ismade of a strong rigid material such as aluminium, brass, steel, plastic, especiallyreinforced plastic like e. g. carbon reinforced plastic resin or the like. Said two tool parts6A, 6B are attached to each other by means of screws 51 (see figure 2) with cooperating nuts 52 with intemal threads and spacers 44, 45 preferably washers 44, 45 inbetween the tool parts 6A, 6B. A preferred and cost effective way to manufacture thetool parts 6A, 6B is to cut out by means of laser or punch out the tool parts from a sheetiron. The tool parts 6A, 6B also comprises holes, one elongated hole 5 in the handle 62and a first 66, a second 67 and a third 68 hole, each having a shape essentially in theform of a sector of an imaginary circle (see figure 2) in the cutting head 63. As can beseen from the figures the handle 62 has been given a somewhat curved form whichtogether with the protruding glide stop 7, preferably forrning a sharp angle ot in relationto the extension of the main body 6, results in an ergonomic design especially adaptedfor pulling. The handle 62 on the cutting device according to the invention gives a good grip for different sizes of hands with and without gloves.
    The active part of the device is the cutting head 63 provided with a thin cutting element4 made of stainless steel, ceramics or the like, arranged between the two tool parts 6A,6B. The cutting element 4 is in the cutting procedure co-operating with an associatedsupport and guiding element 1, 2A, 2B which reaches from the front end 3 of the cutterundemeath the cutting element 4 in the direction of the handle 62. In the preferredembodiment the support and guiding element l, 2A, 2B includes core members 2A, 2Bthat is fixedly attached to the cutter head 63, preferably by being integral with the toolparts 6A, 6B of the cutter head 63.
    The cutting element 4 which in the appended drawings has a circular form (a generallyavailable standard element that may be obtained to a low price) but of course the cuttingelement 4 could as a matter of fact have a number of other suitable forms. However, ageneral principle is to arrange the cutting element 4 attached to said cutting head 63 andposition the guiding and supporting element l, 2A, 2B to form a protecting peripherysuch that any part of a cutting edge 4A of said cutting element 4 does not protrude outside of said periphery. In order to protect the user against the cutting edge 4A it isconceivable to let the cutting element 4 have a radius that is somewhat larger than theradius from a centre of said cutter head to the periphery of said sector forrned holes 66,67, 68. It may also be desirable to let the cutting element 4 have a radius which issmaller than the radius from a centre of said cutter head to the periphery of said sectorformed holes 66, 67, 68. According to this aspect it becomes possible to visuallydetermine if some part of the cutting edge 4A has become damaged. At repositioning ofthe cutting element 4 it is hereby easy to reposition the cutting element 4 without risking a damaged edge 4A in the new cutting position.
    According to the inventive idea the cutting element 4 could also e.g. have a triangularform, a square form or in principle any regular or irregular polygonal form possible toinscribe in a circle with the same diameter as the cutting element shown in the figures ora portion of a circular device (e.g. 90°, l80° or 270°). The holes 66, 67, 68 in the cutterhead 63 are preferably adapted to the shape of the cutting elements so that the cuttingedge 4A is enclosed between the tool parts, and not within reach for the fingers during shifting to a new position.
    There is of course a cutting edge arranged on all the polygonal sides and all vertices willhave the same distance from the centre of the cutting element equal to the radius of thecircular cutting element. It is understood that all those other cutting elements 4 couldeasily replace the circular one on the same cutting device. Each form have its proper advantages.
    In the embodiment illustrated in figure 3 the active exposed cutting edge or cutting zonebetween the points of intersection A and B in figure 3 between a portion of theperiphery of the circular cutting element 4, related to a sector having an angle of amaximum of about 60 degrees, and the supporting element l and a limitation/protectiondevice 46 respectively. This means that the periphery of the cutting element 4 in thiscase comprises at least additionally five portions of the cutting edge which can beshifted into active position between the points A and B when the previous one hasbecome dull. It is a major advantage of the invention that the shift to a new sharp cuttingedge can be made without dismounting the cutting element 4 from the cutting head 63which of course reduces the risk of injuries to the operator or damages to the cuttingelement/blade 4 itself As will be described further on, the shift requires no tool to be carried out.
    Approximately at the centre of the cutting head 63 the tool parts 6A, 6B are bothprovided with a through hole 65, see figure 2, co-operating with a locking device 42, 43comprising a fixing screw 43 preferably having a threaded portion 43A and a knurledhead 43B with a relatively large diameter to make it easy to handle, and a nut 42preferably with a knurled head 42B and a socket part 42A arranged with internal threadsthat co-operates with said threaded portion 43A of the fixing screw. The fixing screw 43is introduced through one of the through holes 65 in one of the tool parts 6A, 6B and thenut 42 is introduced from the opposite side in the other tool part 6A, 6B and the cuttingelement 4 are placed on the socket 42A via a centre hole 42C and arranged betweenthese two. By means of this arrangement the cutting element 4 will be suspended on thesocket part 42A of the nut and being clamped between the tool parts 6A, 6B. There mayalso be arranged a washer 47 in between the tool parts 6A, 6B and the fixing screw 43and the nut 42 respectively. Additionally, a limitation/protection device 46 arranged inbetween the cutting element 4 and one of the tool parts 6A, 6B and is suspended on thesocket part 42A of the nut as well. In order to obtain a clamping effect from the lockingdevice around the cutting element 4 it is appropriate to arrange the length of the socketpart 42A somewhat shorter (typically l mm shorter) than the total thickness of the twotool parts 6A, 6B, the cutting element 4 and the limitation/protection device 46. The sizeof the mounting holes 65, 42C, 47 in the tool parts 6A, 6B, the cutting element 4 and thelimitation/protection device 46 are adapted to tightly fit the socket part 42A therebyproviding the benefit of the cutting element 4 being oriented essentially perpendicular tothe co-operating support and guiding element l, 2A, 2B and also being positioned at afixed distance from the support and guiding element 1, 2A, 2B when the screw 43 istightened.
    The associated support and guiding element l, 2A, 2B has a core in the form of twoelongated members 2A, 2B forming an integral part of the tool parts 6A, 6B and whichas mentioned reaches from the front end 3 of the cutter undemeath the cutting element 4in the direction of the handle 62. This part has advantageously the form of a wedge withthe tip forming the distal end in the direction of the handle 62. The support and guidingelement together with the cutting element 4 and the lower front part 60 of the handlewill define a feed channel 64 having its opening in the direction of the handle fordirecting and feeding the work piece towards the active part of the cutting element between the points A and B in figure 3.
    The core members 2A, 2B are provided with a removable sleeve 1, see for examplefigure 2, preferably made of a suitable plastic (e. g. POM or PTFE), that provides sufficiently low friction for a cloth or the like to easily slide across it. By sliding thesleeve 1 from the right to the left in the figure 1 on top of and over the core members2A, 2B the sleeve 1 can be fixed to the latter. When mounting the sleeve 1 the cuttingelement 4 should already be fixed in between the tool parts 6A, 6B. The dimensions ofthe sleeve 1 are such that the mounted cutting element 4 will cut a slit 1B in an upperportion 1A (see figure 5) of the support sleeve 1 when pushed onto the core member,thereby supporting the cutting edge 4A sidewise and closing the feed channel 64 at theintersection at point A in the figure. Thus, the shortest distance between the upperportion 1A of the support sleeve 1 and the centre of the mounted cutting element 4 isless than the radius of the cutting element. This arrangement will also lock the sleevevertically. In the illustrated embodiment of the invention the distal end of the elongatedcore member has been provided with a heel 21 co-operating with a recess 12 in thesleeve. This arrangement provides a snap-in fianction which will block the longitudinalmovement of the sleeve on the core member 2. However, the sleeve 1 may instead belocked by clamping force to the core members 2A, 2B. At use, the sleeve 1 will berepeatedly pushed in a downstream direction of the feeding channel 64 which will contribute to keep it in position and hence the heel 21 may be omitted.
    It is clear that there is quite some freedom of design when it comes to the profile of thesupport surfaces 10 and 11 of the support sleeve 1, both in front of the cutting area, foresupport surface 10, and behind the cutting area, aft support surface 11. This makes itpossible to design the feed channel 64 to optimise the cutting characteristics of thecutting device for any particular material and environment. Thus, different sleeves fordifferent jobs could be provided. In this context it is an advantage to form a straightlined upper surface of the core members 2A, 2B which provides for easy production andeasy attachment (by sliding) of the support sleeve and to utilise the sleeve 1 (preferably being made of a cheaper material) to form desired surfaces 10, 11.
    In the illustrated embodiment with a circular cutting element 4 the feed channel 64 hasbeen made converging in a cutting portion 100B of the feed channel 64 withsuccessively decreasing cutting angle between the cutting edge 4A and the fore supportsurface 10 of the sleeve 1 in a direction towards the intersection between the two, pointA in figure 3. A considerable component of the cutting edge 4A in the cutting portion100B closest to the intersection between the cutting element 4 and the support surface ofthe sleeve 1, point A, is almost parallel to the work piece fed through the channel 64.For this purpose the guiding and supporting elements 2A, 2B includes a distal portion 20 arranged to form a fixed feeding gap H having a height of e. g. maximum 17 mm in a feed portion 100A of the feed channel 64 together with a protruding portion 60 of thehandle 62. The protruding portion 60 also acting as a rest that may be supported at thesurface of the material to be cut, e.g. paper board, thereby providing a proper position ofthe cutting tool during the cutting operation. In the cutting portion l00B of the feedchannel 64 the sleeve 1 is provided with a portion presenting a smoothly curved surface,the fore support surface 10, that provides for a convergent zone of the feed channel 64,which provides for easy and clog free feeding of material to be cut. The surface of thehandle 62 exposed to the feed channel 64, in the direction of the stop 7 but including theprotruding portion 60, also extends in a manner to reduce the risk of clogging, e.g. bypresenting a large general curvature (preferably larger than 50 mm) and extending toform a smooth converging zone into the feed channel 64. This arrangement has provento be very efficient for cutting textile like materials. The feed portion l00A of the feedchannel 64 is also designed in order to provide good feeding and supporting propertiesfor a large variety of work pieces, e. g. thickness, type of material. The feed portionl00A preferably have a length of 5-30mm, suitably in the order of l5-25 mm betweenthe feeding gap H and the exposed cutting edge 4A. The width of the feeding channel64 may be varied in order to provide different tilting ability by means of increasing the width of the support surfaces 10, 1 1.
    To fiarther improve the protection against the exposed cutting edge 4A the devicecomprises a limitation/protection device 46 arranged in between the cutting element 4and one of the tool parts 6A, 6B. The limitation/protection device 46 comprises a casinghaving a shape essentially in the form of a sector of an imaginary circle, preferablymade in sheet metal or plastic, that extend from the centre of said cutting element 4along one side of the cutting element 4 and around the cutting edge 4A. Thelimitation/protection device 46 has an extension in the circumferential direction of thecutting element 4 which is adapted to the extension of the exposed cutting edge 4A inthe feed channel 64 in order to fully cover or expose the cutting edge 4A, which will bedescribed more in detail later. The limitation/protection device 46 comprises a throughhole 47 and by means of the above described locking device 42, 43 thelimitation/protection device 46 is arranged in between the tool part 6B and the cuttingelement 4. The upper end of the limitation/protection device 46 comprises a handle46A, preferably formed from a part of the sheet which is bended outwards and beingreachable through the third hole 68 acting as an regulation opening 68 for thelimitation/protecting device 46, making it possible to move the limitation/protectiondevice 46 around the cutting elements 4 centre point. In figure 3A is shown a part of the limitation/protection device 46 along the line marked II-II in figure 3. The outer periphery of the limitation/protection device 46 comprises a rim 46B that enclose thecutting edge 4A forming a protection against the cutting edge 4A. The skilled manrealises that protection may also be obtained if the limitation/protection device 46 ismade without a rim but having a somewhat longer radius than the cutting element 4.The limitation/protection device 46 is arranged in such a way between the cuttingelement 4 and the tool part 6B that the handle 46A preferably extends through the thirdhole 68 and is movable between an upper wall 68A and a lower wall 68B in said thirdhole 68, see figure 3. When the handle 46A rests against said lower wall 68B (see figure1) the limitation/protection device 46 closes the exposed cutting edge 4A in the feedchannel 64 and when the handle 46A is moved against the upper wall 68A the cuttingedge 4A in the feed channel 64 is fully exposed. To move the limitation/protectiondevice 46 the screw 43 is somewhat untighten such that it is possible to move thelimitation/protection device 46. The limitation/protection device 46 is moved until adesired exposed cutting edge 4A is exposed and then the screw 43 is tighten again.Thanks to the limitation/protection device 46 the exposed cutting edge 4A may bevaried between zero to a maximum extension corresponding to an angle ofapproximately 60 degrees which enables a variable cutting gap h. The ability to regulatethe height of the gap h dependant to the thickness of the work piece to be cut gives abetter safety, especially when cutting thin work pieces like plastic straps. A scale maybe arranged in connection to the outer periphery of the third through hole 68 on theoutside of the tool part 6A, 6B or on the limitation/protection device 46 itself in order tofacilitate setting of the correct height of the gap h.
    In order to facilitate for the cut material to leave the cutting head in the direction to theleft in figure l without risk of clogging the head, at a split portion l00C of the sleeve lis provided with a divider 13 at the end of the aft support surface 1 1, after the cuttingarea. The divider 13, preferably comprising two walls, has the form of a wedge pointingin the opposite direction of the feeding direction of the cut material. At the point of thewedge is arranged a slit between the two walls which forms a passage for the cutting element during mounting of the sleeve l.
    From the above description it is clear that the cutting device comprises no moving parts.
    The cutting element 4 which is almost entirely protected in between the tool parts 6A,6B could easily be repositioned in order to present a fresh active cutting edge betweenthe positions A and B without dismounting the same. Thanks to the washers 44, 45 that are arranged in between the tool parts 6A, 6B, at mounting of the cutting device, a thin 11 gap G (of approximately l mm) is formed between the two tool parts 6A, 6B, see figure4, that enables a resilient clamping of the cutting element 4 between the tool parts 6A,6B. To reposition the cutting element 4 the screw 43 with knurled head is unscreweduntil the cutting element 4 looses its clamping contact in between the tool parts 6A, 6Band the cutting element 4 is rotated to the new position in which the screw 43 is againtightened. A fresh cutting edge has in this way been entered between the positions Aand B. If necessary the procedure could be repeated. Altematively the rotation of thecutting element 4 could be achieved by first unscrewing the screw 43 as above andthereafter releasing and sliding the sleeve l by pulling it somewhat to the right in thefigure l. Hence, altematively the friction between the cutting element 4 and the slit inthe support surface may be used to force the cutting element to rotate counter clockwisewithout the need to touch the same. Then the screw 43 is again tightened and the sleeve l put back in position.
    In order to change the cutting element 4 as a whole it is not necessary (but possible) todismount the tool parts 6A, 6B from each other but only completely unscrew the screw43. After removing of the screw 43 and the nut 42 the cutting element 4 may be takenout from in between the tool parts 6A, 6B, for example by placing a finger of each sideof the cutting element 4 in one of the triangular holes 66, 67, 68 and pull the cutting element 4 out.
    In another embodiment, not shown in any of the figures, the cutting element 4 could inorder to more precisely define the successive sectors of the cutting edge e.g. be providedwith a number of ho les at regular intervals on a circle around the centre hole of thecutting element 4 co-operating with a pin protruding from the sides of the tool pars 6A,6B, e.g. the sector dividers 70, see fig. 3. Each position of the cutting element 4 with thepin entering a hole will in this way correspond to a particular one of the sectors with anew cutting edge presented between the positions A and B in the figure l. With thegeometries given in e. g. figure l this embodiment could e. g. have six holes co-operatingwith the pin for shifting between six successive cutting edge sectors. In order tofacilitate the release of the cutting element 4 from the pin when the screw 43 issomewhat unscrewed for the shift a spring washer could be placed between the cuttingelement 4 and the side of the tool part 6A, 6B. This washer will lift the cutting element and release it from the pin. 12 The different sectors of the cutting element could be marked e. g. with consecutivenumbers or similar in order to identify a fully used cutting element ready for replacement.
    For embodiments provided with a cutting element of polygonal form it is evident that asuitable form of the profile of the sleeve l could also give a feed channel 64 which isconverging with successively decreasing cutting angle even if the cutting edge or edges form straight lines.
    An interesting form of a polygonal cutting element is the one having twelve vertices (ormore). If the circular cutting element according to the figure l for instance is replacedwith such a cutting element in the position with one vertex at A in the figure there willbe a second vertex around midway between the positions A and B. This means that theactive cutting edge will present an instantaneous decrease of the cutting angle in thefeeding direction. This characteristic is very interesting for efficient cutting of certain materials.
    The cutting operation is generated by the relative movement between the cutting deviceand the work piece that is e.g. a snuffle, a piece of textile cloth, a pile of cloth, a pieceof clothing, a bandage tape, a safety belt at an accident site etc. The distal portion 20 ofthe guiding and support element l, 2A, 2B below the handle 62 of the cutting device isinserted undemeath the work piece and the operator pulls the cutting device essentiallyin parallel with the surface of the work piece. During that movement the cutting element4 should be oriented essentially perpendicular to the surface of said work piece for thebest result. The interaction between the cutting element 4 and the guiding and supportelement l, 2A, 2B will achieve the cutting operation. As has been described above asuitable design of the feed channel will prevent clogging of the cutting head. For thispurpose, e.g. on the downstream side of the cutting portion l00B e. g. the sleeve l may be arranged with a divider 13.
    The figures 6 and 7 show different embodiments of the cutting device according to theinvention. In figure 6 is shown how a tool 53 is arranged instead of the washer 45between the tool parts 6A, 6B by means of a screw 55 and a nut 56, preferably a knurledscrew and nut. Said tool 53 works as a distance to form the earlier described gap Gbetween the tool parts 6A, 6B but also has the function as a tool. In figure 6 is shown atool 53 in form of a glass breaker, a rectangular piece formed with a spike at one short side made in an appropriate material like metal, possibly comprising a diamond cutting 13 edge for cutting glass. Said tool 53 is pivotable around the screw 55 and nut 56 and maybe folded in between the tool parts 6A, 6B when not in use and is exposed for exampleto crash a car window at a rescue action. Of course this tool 53 may have other embodiments like a knife or a saw.
    In figure 7 is shown how a shim 50 is arranged in between the two tool parts 6A, 6Binstead of the washers 44, 45. The shim 50 preferably comprises of a piece of metal,wood, plastics etc. and extends in a way that it closes the elongated hole 5 in the handle62. The shim is fixed by the screws 5l in the handle 62 that is used for assembling thetool parts 6A. 6B. The shim 50 acts like a distance that forms the earlier described gapG and it may also be arranged with advertisement or a logo that is seen from both side of the cutting device through the elongated holes 5.
    In figure 5 is illustrated how the cutting element 4 has made a slit lB in the supportsurface of the sleeve l. The screw 43 has in this example a threaded portion 43A whichwhen mounted will reach through the tool parts 6A, 6B and the nut 42 are introducedfrom the opposite way and the cutting element 4 is arranged in between the tool parts6A, 6B and is suspended on the socket part 42A of the nut 42.
    The tool parts 6A, 6B are preferably identical but the skilled person realises that onetool part need not be provided with through holes in the cutter head 63 or in the handle62. It is in practice suff1cient to let one tool part be arranged with one through hole, i.e.the third hole 68 for arrangement of the limitation/protection device 46 andmanoeuvring of the same. The tool parts 6A, 6B are preferably cut out by laser frommetal sheet but other manufacturing methods may also be used like injection moulding,milling and punching thereby yielding a quick and cost efficient manufacturing of thetool parts. The total number of parts making up the cutting device is very small andtogether with the manufacturing method a cheap and good cutting device may besupplied. Since the tool parts 6A, 6B in a preferred embodiment are identical they canchange place with each other when wom and a new, fresh cutting device is supplied.This is extra obvious when the tool parts are arranged with for example a logo. Whenthe logo is wom the tool parts may be interchanged and a new fresh cutting device issupplied with a fresh logo. This assumes that the tool parts are arranged with a logo at the tool parts” both sides in advance.
    The invention is not delimited to what has been described above but may be varied within the scope of the appended claims. Hence the skilled person realises that many 14 modif1cations may be preforrned regarding many of the features described above, e.g. using different kind of suitable materials, changing some dimension, but still achievebasically the same functionality. For instance it is evident that a cutting deviceaccording to the invention may be very efficient to cut skin/fur (e.g. for a hunter) andalso much safer than the use of a traditional knife.
    权利要求:
    Claims (1)
    [1] 1. l. Hand held cutting device, comprising a main body (6) which comprises a handle(62) and a cutting head (63), further the cutting device comprises a cuttingelement (4) attached to said cutting head (63), a guiding and supporting element(2A, 2B) extending from said cutting head (63), said guiding and supportingelement (2A, 2B) and cutting head (63) being arranged to form a protectingperiphery such that any part of a cutting edge (4A) of said cutting element (4)does not protrude outside of said periphery, said guiding and supporting element(2A, 2B) including a distal portion (20) arranged to form a feed channel (64)together with a portion (60) of said handle (62) and a support device (l) arrangedon said guiding and supporting element (2A, 2B), which support device (l) isarranged to interact with said cutting edge (4A) to improve cutability, and saidcutting element (4) is arranged to be none rotatably, fixedly attached to saidcutting head (63), by means of a locking device (42, 43) that provides for re-positioning and thereby renewing of said cutting edge (4a) and that said supportdevice (l) is arranged with an upper portion (lA) forrning a fixed recess (lB)interacting with said cutting edge (4A), c h a r a c t e ris e d in that said mainbody (6) comprises two tool parts (6A, 6B) with said cutting element (4) being arranged in between. Hand held cutting device according to claim l, c h a r a c t e ris e d in that said two tool parts (6A, 6B) are identical and preferably attached to each other. . Hand held cutting device according to claim l, c h a r a c t e ris e d in that said locking device (42, 43) comprises a fixing screw (43) and a nut (42) that co-operates with each other and said nut (42) comprises a socket part (42A) havingan outer diameter adapted to the diameter of mounting ho les (65, 42C,) in thetool parts 6A, 6B and the cutting element (4), said cutting element (4) beingsuspended on the socket part (42A) thereby being properly positioned in relationto said support device (l). Hand held cutting device according to claim l or 2, c h a r a c t e r i s e d in thatsaid tool parts (6A, 6B) are releasably attached to each other with at least onespacer (44, 45, 50) in between said tool parts (6A, 6B), preferably either in theform of a plurality of washers (44, 45) or a shim (50). 10. 11. 16 . Hand held device according to claim 1, c h a r a c t e r i s e d in that said upper portion (lA) is provided with a smoothly curved, low friction surface (1 1) thatprovides for a substantially clo g free converging zone of the feed channel (64) ina feed portion (100A) of the feed channel (64). Hand held device according to claim 1, c h a r a c t e r i s e d in that said supportdevice (1) is in a forrn of a sleeve arranged to fit on a core element (2A, 2B) ofsaid guiding and supporting element, preferably who lly made of a softer materialand more preferred arranged with a snap-in arrangement (21, 12) to securely attach the sleeve. Hand held device according to claim 6, c h a r a c t e ris e d in that said sleeve(1) is arranged with a divider (13), preferably comprising two walls having theform of a wedge pointing in the opposite direction of the feeding direction of thecut material to facilitate for the cut material to leave the cutting head (63) without risk of clogging. . Hand held device according to claim 7, c h a r a c t e r i s e d in that at the point of the wedge (13) there is arranged a slit between the two walls which forrns a passage for the cutting element during mounting of the sleeve (1). Hand held device according to any of preceding claims, c h a r a c t e r i s e d in that an integral glide stop (7) is arranged at a distal end of said main portion (6). Hand held cutting device according to any of preceding claims, c h a r a c t e r i s e d in that said cutting device further comprises alimitation/protection device (46) being arranged in between said cutting element(4) and one of said tool parts (6A, 6B) and being suspended on said socket part(42A). Hand held cutting device according to claim 10, c h a r a c t e r i s e d in that saidlimitation/protection device 46 having an extension in the circumferentialdirection of the cutting element 4 which is adapted to the extension of theexposed cutting edge (4A) in the feed portion (100A) of the feed channel (64) inorder to fully conceal or fially or partly expose the cutting edge (4A) in the feedportion (100A). 12. l3. 14. 15. 17 Hand held cutting device according to claim ll, c h a r a c t e r i s e d in that saidlimitation/protection device (46) is rotatably arranged around an axis of rotationof said cutting element (4) and essentially in parallel With said cutting element(4), said rotation also enabling regulation of a cutting gap (h) having a maximumheight When the limitation/protection device (46) is in a retracted positionWherein the cutting edge (4A) preferably is fully exposed in the feed portion(l00A) of the feed channel (64), and further having a minimum height When thelimitation/protection device (46) is in an extended position Wherein the cuttingedge (46A) is partly but preferably fully concealed in the feed portion (lOOA) ofthe feeding channel (64). Hand held cutting device according to claim l2, c h a r a c t e r i s e d in that saidlimitation/protection device (46) is provided With a handle (46A) Which isreachable through a regulating opening (68) in one of the tool parts (6A, 6B) inthe cutting head (63), said opening preferably also providing an inspectionopening for inspection of an unexposed part of the cutting edge (4A) positionedoutside the feed portion (l00A), in between the tool parts (6A, 6B) in the cuttinghead (63). Hand held cutting device according to claim l, c h a r a c t e r i s e d in that saiddistal portion (20) being arranged to form a fixed feeding gap (H) in a feedportion (l00A) of said feed channel (64) together With a protruding portion (60)of said handle (62). Hand held cutting device according to claim l, c h a r a c t e r i s e d in that saidcutting device at the rear end comprises a tool (53), e. g. a glass breaker, that maybe folded in between said tool parts (6A, 6B) When not in use, said tool (53) alsoacting as said spacer (45).
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    同族专利:
    公开号 | 公开日
    SE537056C2|2014-12-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1250598A|SE537056C2|2012-06-08|2012-06-08|Hand Cutting device|SE1250598A| SE537056C2|2012-06-08|2012-06-08|Hand Cutting device|
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