CN102463577A

CN102463577A - Cutting tool

Info

Publication number: CN102463577A
Application number: CN201110335086XA
Authority: CN
Inventors: 本田太一
Original assignee: Kokuyo Co Ltd
Current assignee: Kokuyo Co Ltd
Priority date: 2010-10-28
Filing date: 2011-10-28
Publication date: 2012-05-23
Also published as: JP2012090860A; JP5636564B2

Abstract

The invention provides a cutting tool which allows locking and locking release to be realized only through operation force applied to the direction of extending and withdrawing of the cutting tool, and also enables the locing state to be firmly guaranteed. A guiding member (13) is accommodated in a housing (12). The guiding member (13) is provided with a sliding body (15) in a forward and backward moving manner for maintaining a cutting blade (14). The sliding body (15) is equipped with a flat spring (17). The flat spring (17) is arranged to extend forward and backward between the sliding main body (42) and an operation member (44). The flat spring is provided with wing portions (98) that are positioned on the two sides along the width direction of the guiding member (13) and are arranged between protruding portions (36). The wing portions (98) are positioned between the protruding portions (36) for locking the sliding body (15). Forward and backward operation force is applied to the operation member (44) so that when the flat spring (17) is bent and deforms, the wing portions (98) are lifted between the protruding portions (36) for locking release.

Description

Cutting tool

Technical field

The present invention relates to cutting tool, more specifically, relating to can be easily and carry out reliably cutting blade is stretched out the locking of the slide mass that is retracted into operation and the cutting tool of latch-release.

Background technology

Known cutting tool, for example, as open in the patent documentation 1, it constitutes, and possesses: the housing of upwardly extending cardinal principle C shape in front and back; In this housing, be arranged to the slide mass that can move up in front and back; With the cutting blade that is held in this slide mass.Between slide mass and housing, clamped locking mechanism,, can make cutting blade be classified to give prominence to, on the other hand, can cutting blade have been remained on certain position from the front end of housing through this locking mechanism.

For the cutting tool of the type, above-mentioned slide mass is positioned at the side of housing, under the situation that dexterous people uses, can enough hand thumb easily operate, still, the non-constant of ease of use for left-handed people.

So the application's applicant has proposed, that kind of patent documentation 2 record for example, configuration operation parts in the upper end of housing and to strong hand cutting tool influence, so-called universal class.This cutting tool adopts following formation: possess: comprise slide mass main body that is positioned at housing and the functional unit that can on fore-and-aft direction, be combined in this slide mass main body movably; And can engage in case side through the leaf spring that will between slide mass main body and housing, be provided with and to break away from ground and be provided with the locking of carrying out slide mass and the locking mechanism of latch-release.

The prior art document

Patent documentation 1: open clear 57-128968 communique in fact;

Patent documentation 2: the spy opens the 2008-229076 communique.

At the cutting tool of patent documentation 2 records, make bend engage disengaging with the notch part of the guiding part that is positioned at housing with locking and latch-release in the leaf spring setting, do not relate to the design philosophy of guaranteeing lock-out state securely.

This point; The cutting tool of patent documentation 1 record is: be positioned at the notch part of guiding part and can carry out the locking of slide mass through making the teat in the slice part setting of slide mass; And through pushing slice part teat is broken away to carry out the formation of latch-release from notch part, compare with the formation of patent documentation 1 and can guarantee lock-out state securely.

But in the cutting tool of patent documentation 1 record, the direction of operation slide mass is different with the direction of removing locking, and when operation, there is difficult point in the operating physical force that needs the limit by flanging slide mass to be moved forward and backward on operability.

Summary of the invention

Invent problem to be solved

The present invention is conceived to this type of unfavorable condition and proposes, and its objective is only to provide through on the direction that cutting tool is stretched out be retracted into, applying operating physical force just can lock with latch-release and can guarantee the cutting tool of lock-out state securely.

The technical scheme that is used to deal with problems

For realizing above-mentioned purpose, the present invention adopts the formation of the scope record of asking for protection.That is, a kind of cutting tool possesses: housing, and it has the upwardly extending inner space in front and back and fore-and-aft direction is provided with the groove that links to each other with this inner space; Cutting blade, it is captured in this housing and is arranged to stretch out from the front end of this housing and is retracted into; Slide mass, it keeps this cutting blade and is arranged to and can in above-mentioned housing, moves up in front and back; And leaf spring, it is installed on this slide mass and can be provided with the locking of permission slide mass and the releasing of locking with respect to above-mentioned case side with loading and unloading, and above-mentioned slide mass comprises: the slide mass main body, it is positioned at above-mentioned housing; And functional unit, it makes up to such an extent that can on fore-and-aft direction, relatively move and be positioned at the upper side of above-mentioned housing through above-mentioned slit with respect to this slide mass main body with respect to this slide mass main body, it is characterized in that:

Guiding part is set, and this guiding part is accepted above-mentioned slide mass, and has along the fore-and-aft direction of above-mentioned housing and be formed with the side wall surface of protuberance by each predetermined space,

Above-mentioned leaf spring is configured between above-mentioned slide mass main body and functional unit, extend upward in front and back, and has and possess the shape that can be positioned at the junction surface between raised part,

Thereby the locking of above-mentioned slide mass is carried out in above-mentioned junction between protuberance, on the other hand,

When above-mentioned functional unit has applied the operating physical force of fore-and-aft direction, the change in size of the fore-and-aft direction of above-mentioned leaf spring and make above-mentioned junction surface between protuberance, rise displacement and remove above-mentioned locking.

In the present invention, above-mentioned leaf spring is arranged to the shape with respect to symmetry before and after the fore-and-aft direction central authorities, and the above-mentioned junction surface central portion that comprises leaf spring enlarges and be positioned at the alar part to engage with this protuberance between raised part to the width outside,

Can adopt following formation: between protuberance, rise and unlock at alar part when above-mentioned functional unit applies operating physical force, on the other hand, when removing operating physical force, above-mentioned alar part is positioned between protuberance and locks.

In addition, above-mentioned leaf spring adopts following formation, and it comprises: in the front and back pair of planar portion that fore-and-aft direction extends; The bend that links to each other with the rear end of the front end of toe lateral planar portions and rear portion side planar portions; Be positioned between above-mentioned planar portions and the central flat face lower than the plan-position of this planar portions; Form the alar part at above-mentioned junction surface with giving prominence to the facial width outside of this central flat with enlarging.

At this moment, can be set to: when above-mentioned functional unit applies operating physical force, the bend angular displacement of front and back (angular displacement) makes above-mentioned planar portions crooked, and above-mentioned thus alar part is disengaged with engaging of protuberance.

Have, adopt as follows to constitute: each upper limb at the pair of sidewalls face that constitutes above-mentioned guiding part is formed with raised part respectively, and above-mentioned alar part is set to again, and on width, disposes a pair of and engages respectively with the protuberance of each upper limb of above-mentioned pair of sidewalls face.

Here, the aforesaid operations parts can be set to, and comprising: the anterior rib of pushing the bend that links to each other with the toe lateral of above-mentioned leaf spring; Push with the rear portion of pushing the bend that links to each other with the rear portion side of above-mentioned leaf spring and to use rib, anterior rib and rear portion are pushed with rib and are pushed bend selectively, thereby make above-mentioned planar portions crooked and remove the joint of above-mentioned alar part and protuberance.

The effect of invention

According to the present invention, only just make leaf spring fore-and-aft direction change in size remove the joint of junction surface and protuberance, so the direction of operating of slide mass is identical with the direction of removing locking, can give ease-to-operate through the operating physical force that applies fore-and-aft direction to functional unit.And, do not applying under the state of operating physical force to functional unit, remain the state of junction between protuberance, therefore can keep the state of locking securely.

Therefore in addition, symmetric shape before and after leaf spring is set in that functional unit is all caused same distortion in the arbitrary operation during to front or rear operation, can stably lock with latch-release and move.

Have, the alar part that constitutes the junction surface is given prominence to and is formed to the mode of width outside expansion with the central flat face of leaf spring, therefore is positioned under the state between protuberance at this alar part, can stop reliably in front and back to move up, and can guarantee lock-out state securely again.On the other hand, when the operating operation parts, can make the alar part position between protuberance, rise displacement, can carry out latch-release swimmingly through the flexural deformation of planar portions to remove joint.

In addition, alar part is disposed a pair of on width and makes these alar parts be loaded and unloaded on the formation of the protuberance of guiding part respectively, can keep lock-out state more firmly through being made as.

Description of drawings

Fig. 1 is the approximate three-dimensional map of the related cutting tool of this embodiment.

Fig. 2 is the exploded perspective view of above-mentioned cutting tool.

Fig. 3 is the vertical view that is illustrated in the state that has placed guiding part in the housing.

Fig. 4 (A) is the longitudinal section of Fig. 3, (B) is the amplification view along the A-A line of Fig. 4 (A).

Fig. 5 (A) is the vertical view of guiding part, (B) is the central cross sectional view of guiding part.

Fig. 6 is illustrated in the approximate three-dimensional map that slide mass keeps the state of cutting blade.

Fig. 7 (A) is the front view of slide mass main body, (B) is its vertical view, (C) is its rearview.

Fig. 8 (A) is the B-B line cutaway view of Fig. 7 (A), (B) is the C-C line cutaway view of Fig. 7 (A), (C) is the D-D line cutaway view of Fig. 7 (A).

Fig. 9 (A) is the E-E line cutaway view of Fig. 7 (A), (B) is the F-F line cutaway view of Fig. 7 (A), (C) is the G-G line cutaway view of Fig. 7 (A).

Figure 10 (A) is the front view of pressing component, (B) is its rearview, (C) is its vertical view.

Figure 11 (A) is the left view of Figure 10 (B), (B) is the M-M line cutaway view of Figure 10 (B), (C) is the amplification view of the N-N line of Figure 10 (B).

Figure 12 (A) is the front view of functional unit, (B) is the left view of (A), (C) is the rearview of functional unit, (D) vertical view of functional unit.

Figure 13 (A) is the H-H line amplification view of Figure 12 (A), (B) is the I-I line cutaway view of Figure 12 (A), (C) is the J-J line cutaway view of Figure 12 (A), (D) is the K-K line cutaway view of Figure 12 (A), (E) is the L-L line cutaway view of Figure 12 (A).

Figure 14 (A) is the front view of leaf spring, (B) is its vertical view, (C) is its side view.

Figure 15 is the Action Specification figure that cutting blade is installed in the slide mass main body.

Figure 16 is the state of cutting blade is pushed in expression with pressing component Action Specification figure.

Figure 17 is illustrated in the Action Specification figure that the slide mass main body has been installed the state of plate spring component.

Figure 18 is the action specification figure of expression locking and latch-release.

Description of reference numerals:

Facial 98 alar parts (junction surface) the S inner space of 10 cutting tools, 12 housings, 13 guiding parts, 14 cutting blades, 15 slide masses, 17 leaf springs, 36 protuberances, 42 slide mass main bodys, 44 functional units, 92,93 planar portions, 95,96 bends, 97 central flat

The specific embodiment

Specify embodiment of the present invention with reference to the accompanying drawings.Have, in this manual, " preceding " is used in reference to a side most advanced and sophisticated of living in of cutting blade again, and on the other hand, " back " is used in reference to its opposition side.

In Fig. 1 and Fig. 2, the formation of cutting tool 10 possesses: the housing 12 that has in front and back upwardly extending inner space S (with reference to Fig. 4 (B)); The guiding part 13 that in this housing 12, places; Thereby be arranged to move up in front and back along this guiding part 13 and can stretch out the cutting blade 14 that is retracted into from the front end of housing 12; The slide mass 15 that keeps this cutting blade 14 and be arranged to together to move with this cutting blade 14 along guiding part 13; With leaf spring 17, it is provided with between this slide mass 15 and housing 12, and can be provided with in above-mentioned housing 12 sides with loading and unloading and be configured for carrying out the locking of slide mass 15 and the locking mechanism of latch-release.

Above-mentioned housing 12 forms and extends upward in front and back and elongated shape that available palm is held.This housing 12 comprises: the upwardly extending diapire 20 in front and back; The pair of sidewalls face 21 that links to each other with the short dimension width direction of this diapire 20; With with the top of this side wall surface 21 between link to each other roof 22.The front-end and back-end of housing 12 are opening shape, in the front end loading and unloading cap 23 are installed freely, and loading and unloading are equipped with breechblock 25 freely in the rear end.Shown in Fig. 3 and Fig. 4 (B),,, nearby be formed with the slit 27 that links to each other with above-mentioned inner space S till the position up to leading section from the rear end in the position of squinting slightly to side wall surface 21 sides at roof 22.In addition, at the front end face of cap 23, be formed with the outstanding vertical core 28 of front end region that is used to make above-mentioned guiding part 13.Zone between the side of crossing over above-mentioned side wall surface 21 and cap 23 is formed with the upwardly extending fenestra 29 in front and back, can see the residue length that is positioned at inner cutting blade 14 through this fenestra 29.Though the housing 12 of this embodiment uses suitable resin material integrally formed; But; Two fens moulds that also can be composition surface (land area) in order to the centre position of thickness direction (with the direction of the face quadrature of above-mentioned side wall surface 21) are shaped, and/or, cap 23 and housing 12 are formed as one.

As shown in Figure 4; The rearward end upper surface side of above-mentioned diapire 20 forms the rear portion diapire 20A of low one-level; The subtend face of the above-mentioned side wall surface 21 in the zone of this rear portion diapire 20A; Be formed with upwardly extending slot part 30 in front and back, can be chimeric at the teat 31 that above-mentioned breechblock 25 forms with this slot part 30.Breechblock 25, rear end become crooked sealing surface, and the upper surface is formed with the slit 32 that links to each other with the slit 27 that forms at above-mentioned roof 22.

Above-mentioned cutting blade 14 uses identical with known cutting blade structure cutting blade, its be most advanced and sophisticated and rear end overlook with respect to the bearing of trend inclination of blade be roughly parallelogram tabular, possess hole 14A's at the rear portion.

As shown in Figure 5, above-mentioned guiding part 13 comprises: with respect to the diapire 20 of the above-mentioned housing 12 matrix face 34 parallel substantially with side wall surface 21; With pair of sidewalls face 35, its form link to each other with the short dimension width direction both sides of this matrix face 34 and towards cardinal principle vertical top and with the parallel face of above-mentioned cutting blade 14 cardinal principles.The front of side wall surface 35 becomes: leave the facial 35A of inclination that width narrows down gradually each other; With parallel facial 35B; Its front end with this facial 35A that tilts links to each other and is set in vertical guide the gap of passing through of guiding cutting blade 14 on the cardinal principle straight line, and this parallel facial 35B is applied in vertical core 28 that the antetheca 23 of above-mentioned housing 12 forms and forwards outstanding.

Be formed with in each side wall surface upper end of above-mentioned pair of sidewalls face 35 along the notch part 37 of fore-and-aft direction with determining deviation configuration, between these notch parts 37, be formed with protuberance 36, linking to each other in anterior position more is provided with to the outstanding tongue piece portion 38 in back upper place.Insertion limit when this tongue piece portion 38 is used for confirming the rear ends of guiding part 13 in housing 12 are inserted.Have again,, be formed with along fore-and-aft direction and extend and the inboard fenestra 39 overlapping with the fenestra of above-mentioned housing 12 29 at the front area of side wall surface 35.

Above-mentioned slide mass 15 constitutes and releasably keeps above-mentioned cutting blade 14.As shown in Figure 2, this slide mass 15 comprises: possess the slide mass main body 42 of teat 41, this teat 41 is taken in the hole 14A that the rear portion of cutting blade 14 forms; Be arranged to interact with the pressing component 43 of the rearward end that sandwiches cutting blade 14 with this slide mass main body 42; With make up with respect to above-mentioned slide mass main body 42 the functional unit 44 that can on fore-and-aft direction, relatively move.

Above-mentioned slide mass main body 42, the position is parallel substantially with the face of cutting blade 14, and is provided in the upwardly extending profile that is general plate of overlooking in front and back.To shown in Figure 9, this slide mass main body 42 comprises like Fig. 6: the position is along the face at the rearward end place of cutting blade 14 and be integrally formed with the maintenance facial 46 of above-mentioned teat 41; Link to each other with rear portion and be positioned at the installation portion of functional unit 44, the latter half of installation portion 47 of pressing component 43 with this maintenance facial 46.Keeping face 46, face side is formed with inclination protrusion 46A within it, on the other hand, is formed with the 46B of upper level portion on top.Inclination protrusion 46A is corresponding to the end edge shape of cutting blade 14 to limit the back-end location of this cutting blade 14; On the other hand, the 46B of upper level portion engages with the rear end upper limb of cutting blade 14 and plays a role as interim rotation restrictions when keeping this cutting blade 14.Here, than inclination protrusion 46A by the rear position be formed with above-mentioned pressing component 43 support freely bearing portion 48 of swing.

Above-mentioned installation portion 47 comprises: the upper surface part 49 and lower surface portion 50 that link to each other with the rear portion that keeps facial 46; And the face portion 51 of 50 of this upper surface 49 and lower surfaces.In upper surface part 49, two positions before and after it are formed with recess 49A.In the face of face portion 51, rear side is provided with spring installation portion 52 on top, and two positions of the fore-and-aft direction below leaning on than it are provided with the slotted eye 55 towards fore-and-aft direction.Spring installation portion 52 comprises: the front humps portion 58 that is connected in the upper end of above-mentioned inclination protrusion 46A via horizontal protrusion 57 by the L shape; The roughly symmetrical rear humps portion 59 of rearward end and front humps portion 58 in face portion 51; With horizontal protrusion 60, the protrusion 58 of the L shape of this horizontal protrusion 60 before and after these, between 59, and and this protrusion 58, be formed with clearance C 1 between 59 respectively in front and back.Here, the face portion 51 above the central portion than horizontal protrusion 60 leans on is formed with square hole 51A, and the face portion 51 below leaning on than horizontal protrusion 60 is formed with the breach of " コ " shape on the other hand, is formed with the plate member 62 that is made as face location portability position thus.

Like Figure 10 and shown in Figure 11, above-mentioned pressing component 43 comprises: the main surface 63 of above-mentioned maintenance facial 46 and installation portion 47 is crossed in the position; With with Figure 10 (A) of this main surface 63 in the pressing operation face 64 that links to each other of right side.Left end side among Figure 10 of main surface 63 (A) becomes the press surface 63A that is formed with notch part 63B; This notch part 63B accepts the teat 41 of slide mass main body 42; Be provided with and be arranged at the central portion of pressing operation face 64 slide mass main body 42 bearing portion 48 chimeric roughly semicircle shapes ring (ring; Prominent axle) 65, and be formed with protuberance 66 on its right side.In addition, the right-hand member side in Figure 10 of above-mentioned pressing operation face 64 (C) is formed with the projection 64 of the plate member 62 that is connected to above-mentioned slide mass main body 42.In addition, be formed with upwardly extending protrusion 63C at two positions up and down of press surface 63A in front and back.

Above-mentioned pressing component 43, in love at the state that is installed on above-mentioned slide mass main body 42, through the outer surface side of pressing operation face 64 being pushed, can be that pivot shakes thus with the axis of ring portion 65 with finger tip.Therefore, the front of main surface 63 promptly is formed with the press surface 63A side of notch part 63A, with respect to the maintenance of slide mass main body 42 facial 46 near away from the direction superior displacement, thereby can carry out the loading and unloading of cutting blade 14.

Like Fig. 2, Figure 12 and shown in Figure 13, aforesaid operations parts 44 comprise: along the roof 22 of above-mentioned housing 12 extend upward in front and back and below two positions of side be provided with upwardly extending prominent bar 72A in front and back operation with plane 72; The brace 73 that on this operation upper surface distolateral, links to each other and be provided with and be in the state of the slit 27 that runs through housing 12 with the short dimension width direction on plane 72 one; The finger contact site 74 that links to each other and be provided with the cantilever posture substantially via this brace 73; At aforesaid operations the hang down face 76 relative with the installation portion of above-mentioned slide mass main body 42 47 with another distolateral continuous setting of short dimension width direction on plane 72; Be provided with and can not be inserted in with coming off the insertion sheet portion 77 in the slotted eye 55 of above-mentioned slide mass main body 42 with former and later two positions in the face of the face 76 that hangs down at this.Shown in Figure 12 (A), above-mentioned rear end of hanging down face 76 has than operation and is positioned at the length at rear with the rear end on plane 72, is provided with the rear portion that aft bulkhead portion 78 (with reference to Figure 12 (C)) links to each other with front face side with this aft bulkhead portion 78 in its back-end and pushes with rib 79.In addition; In addition; Be arranged at aforesaid operations shorter with the fore-and-aft direction length of the prominent bar 72A of the following side on plane 72 and above-mentioned insertion sheet portion 77 than the fore-and-aft direction length of recess 49A that is arranged at slide mass main body 42 and slotted eye 55, be provided with length difference; Thus, functional unit 44 can make up to such an extent that can not come off and can relatively move along fore-and-aft direction with respect to slide mass main body 42.Here, the difference of above-mentioned length be set at following poor: when functional unit 44 is relatively moved with respect to slide mass main body 42, above-mentioned leaf spring 17 produces the needed deflection of latch-releases.

In the above-mentioned face 76 that hangs down; With above-mentioned insertion sheet portion 77 identical substantially line on; Shown in Figure 12 (C) and Figure 13 (B), be provided with upwardly extending anterior rib 80 and central rib 81 in front and back, anterior rib 80 is used for pushing with rib 79 with above-mentioned rear portion together makes pushing that leaf spring 17 is out of shape.

In addition, above the insertion sheet portion 77 that is positioned at the place ahead, be formed with upwardly extending square hole 83, and, be formed with block-shaped chip 84 towards fore-and-aft direction in the both sides, front and back in this hole 83 in front and back.Have again;

Reference numeral

88,89 expression is inserted the shaping of sheet portion 77 and prominent bar 72A and the hole that is provided with for ease among Figure 12 A; In addition, the part in the hole 88 in the place ahead in the hole 88 before and after forming becomes the crowning 90 that the thickness of slab part with the portion of hanging down 76 is provided with than heavy back.

Like Fig. 2 and shown in Figure 14, above-mentioned leaf spring 17 comprises: the upwardly extending front and back pair of

planar portion

92,93 in front and back; The

bend

95,96 that links to each other with the rear end of the front end of toe lateral planar portions 92 and rear portion side planar portions 93; Be positioned at 92,93 of above-mentioned planar portions and the central flat facial 97 lower than the plan-position of this

planar portions

92,93; Form a pair of alar part 98 at junction surface with giving prominence to the width outside of this central flat facial 97 with

enlarging.Planar portions

92,93 always is the shape that is positioned on the same plane under no-load condition, bend 95,96 become with respect to the face of

planar portions

92,93 substantially the right angle towards.

Have, other component parts that the cutting tool 10 in this embodiment becomes except above-mentioned slide mass 15 are opened the identical formation of the disclosed cutting tool essence of 2008-229076 communique (patent documentation 1) with the spy who has submitted to again.

Next, the assemble method and the method for using of the cutting tool 10 in this embodiment are described with reference to Figure 15 to Figure 18.

At first, guiding part 13 is inserted from the rear portion of housing 12 and chimeric in inner space S, fixing.On the other hand, in the slide mass 15, on slide mass main body 42, assemble pressing component 43, leaf spring 17 and functional unit 44 successively.In this assembling, at first, make them overlap (with reference to Figure 15, Figure 16) making under the relative state of pressing component 43 and slide mass main body 42, and the ring portion 65 of pressing component 43 is embedded in the bearing portion 48 of slide mass main body 42 sides by the strong hand.Thus; Pressing component 43; Through pushing pressing operation face 64, projection 64A make plate member 62 make at the thickness direction superior displacement press surface 63A side can with respect to keep facial 46 away from direction on move, on the other hand; Through remove the pushing of pressing operation face 64, press surface 63A gets back to original position by the elastic recovering force of plate member 62, at press surface 63A with keep can sandwiching between facial 46 the rearward end of cutting tool 14.

Then, at the spring installation portion 52 of slide mass main body 42 leaf spring 17 is installed.This installation is carried out through following step: the toe lateral planar portions 92 of leaf spring 17 is positioned on the horizontal protrusion 60 of slide mass main body 42 with rear portion side planar portions 93, and bend 95,96 is extended downwards through each clearance C 1 of front and back.

Under the state of the installation of having accomplished leaf spring 17, functional unit 44 is assembled in slide mass main body 42.This assembling can be through carrying out in the slotted eye 55 that will be inserted in slide mass main body 42 in the insertion sheet portion 77 that the face that hangs down of functional unit 44 76 is provided with respectively.If carry out this insertions, then be positioned at corresponding concave part 49A with the prominent bar 72A of the lower surface setting on plane 72, and alar part 98 is located in the hole 83 of the interior setting of face of the portion of hanging down 76 in the operation of functional unit 44.At this moment, shown in Figure 18 (A), leaf spring 17 is being kept under the state of original shape, between slide mass main body 42 and functional unit 44.

To in slide mass 15, keep the unit under the state of cutting blade 14, be that the direction of insertion front is inserted in above-mentioned housing 12 with the most advanced and sophisticated side of cutting blade 14.At this moment, the brace 73 with cantilever posture supporting functional unit 44 is under the state of the groove 27 that runs through housing body 12 up and down, and finger contact site 74 is positioned on the roof 22.And, insert breechblock 25 and chimeric at the tail end of housing 12, thereby can accomplish the assembling of cutting tool 10.

Making under cutting tool 14 situation outstanding,,, functional unit 44 forwards (is left) and applies operating physical force to get final product among the same figure as long as with the above-mentioned finger contact site 74 of finger contact at the initial position shown in Figure 18 (A) from the front end of housing 12.Thus, shown in Figure 18 (B), functional unit 44 forwards relatively moves with respect to the leaf spring of on slide mass main body 42, installing 17, pushes the bend 96 of pushing the rear with rib 79 at the rear portion of the rearward end setting of functional unit 44.At this moment; The bend 95 and anterior rib 80 butts in the place ahead; Therefore leaf spring 17 is stressed and toe lateral planar portions 92 and rear portion side planar portions 93 limit curved edges are shifted to the top from the both sides, front and back; At this moment, alar part 98 is shifted to the top from the state of the notch part 37 that is positioned at guiding part 13, removes the state that engages with the side edge of protuberance 36.Therefore; According to the direction of operating of giving functional unit 14 slide mass 15 is forwards moved so that cutting blade 14 exposes predetermined length; When removing operating physical force, leaf spring 17 returns to original shape so that alar part 98 is positioned at the notch part 37 of 36 of protuberances and remains latched position.

Cutting blade 14 is being returned under the situation in the housing 12, as long as functional unit 44 is rearward applied operating physical force.Thus, anterior rib 80 is pushed the bend 95 of toe lateral, thereby carries out above-mentioned same shift motion to allow retreating of slide mass 15 mobile, when removing this operating physical force, keeps lock-out state once more.

Therefore, according to this embodiment, the alar part 98 of leaf spring 17 is positioned at the notch part 37 of 36 of protuberances and keeps alar part to be articulated in the state of the side of protuberance 36, therefore can keep lock-out state securely.And, in the time will removing this lock-out state, only apply the power that functional unit 44 is moved forward and backward and get final product, therefore also given ease-to-operate.

The best formation, method etc. that are used for embodiment of the present invention are open in above record content, and still, the present invention is not limited to this.

Promptly; Though the present invention mainly specifically illustrates and explains specific embodiment; But under the situation of the scope that does not break away from technological thought of the present invention and purpose; Those skilled in the art can carry out various distortion for the embodiment of above description in shape, material, quantity, other detailed formations.

Therefore; The record that defines above-mentioned disclosed shape, material etc. is the content of understanding of the present invention for ease and illustration ground record; Therefore do not limit the present invention, the record content of the title of the parts except the part of the qualification of these shapes, material etc. or whole qualification is also contained among the present invention.

For example, leaf spring 17 is not limited to diagram and constitutes example, as long as can carry out identical in fact following with respect to the protuberance of guiding part 13, just can adopt different shape.In addition, as long as alar part 99 has one at least.

Claims

1. cutting tool possesses: housing, and it has the upwardly extending inner space in front and back and fore-and-aft direction is provided with the groove that links to each other with this inner space; Cutting blade, it places and is arranged to stretch out from the front end of this housing in this housing and is retracted into; Slide mass, it keeps this cutting blade and is set to and can in above-mentioned housing, moves up in front and back; And leaf spring, it is installed on this slide mass and is arranged to can be with respect to above-mentioned case side loading and unloading with the locking of permission slide mass and the releasing of locking, and above-mentioned slide mass comprises: the slide mass main body, it is positioned at above-mentioned housing; And functional unit, it is assembled to such an extent that can on fore-and-aft direction, relatively move for this slide mass main body and is positioned at the outside of above-mentioned housing through above-mentioned groove,

It is characterized in that:

Be provided with guiding part, this guiding part places above-mentioned slide mass, and has along the fore-and-aft direction of above-mentioned housing and be formed with the side wall surface of protuberance by each predetermined space,

When above-mentioned functional unit applies the operating physical force of fore-and-aft direction, thus the change in size of the fore-and-aft direction of above-mentioned leaf spring and make the displacement of between protuberance, rising of above-mentioned junction surface remove above-mentioned locking.

2. cutting tool according to claim 1 is characterized in that:

Above-mentioned leaf spring is arranged to the shape with respect to symmetry before and after the fore-and-aft direction central authorities, and above-mentioned junction surface comprises: the central portion of leaf spring is positioned at the alar part to engage with this protuberance between raised part to the expansion of the width outside,

Between protuberance, rise and unlock at alar part when above-mentioned functional unit applies operating physical force, on the other hand, when having removed operating physical force, above-mentioned alar part is positioned between protuberance and locks.

3. cutting tool according to claim 1 and 2 is characterized in that:

Above-mentioned leaf spring comprises: in the front and back pair of planar portion that fore-and-aft direction extends; The bend that links to each other with the rear end of the front end of toe lateral planar portions and rear portion side planar portions; Be positioned between above-mentioned planar portions and the central flat face lower than the plan-position of this planar portions; Form the alar part at above-mentioned junction surface with giving prominence to the mode that enlarges to the facial width outside of this central flat.

4. cutting tool according to claim 3 is characterized in that:

When above-mentioned functional unit applies operating physical force, above-mentioned planar portions is crooked, thereby removes the joint of above-mentioned alar part and protuberance.

5. according to each described cutting tool in the claim 1 to 4, it is characterized in that:

Each upper limb at the pair of sidewalls face that constitutes above-mentioned guiding part is formed with raised part respectively, and above-mentioned alar part disposes a pair of on width and is set to and engages respectively with the protuberance of each upper limb of above-mentioned pair of sidewalls face.

6. according to claim 4 or 5 described cutting tools, it is characterized in that:

The aforesaid operations parts comprise: the anterior rib of pushing the bend that links to each other with the toe lateral of above-mentioned leaf spring; Push with the rear portion of pushing the bend that links to each other with the rear portion side of above-mentioned leaf spring and to use rib, anterior rib and rear portion are pushed with rib and are pushed bend selectively, thereby make above-mentioned planar portions crooked and remove the joint of above-mentioned alar part and protuberance.