CN202825860U

CN202825860U - Art knife

Info

Publication number: CN202825860U
Application number: CN 201220335044
Authority: CN
Inventors: 邬岳伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-11
Filing date: 2012-07-11
Publication date: 2013-03-27
Anticipated expiration: 2022-07-11
Also published as: AU2013202032A1; FR2993196A3; DE202013101416U1

Abstract

The utility model relates to an art knife with blades capable of retracting automatically. The art knife comprises an outer shell. A gap which can enable a main blade to stretch out is arranged on the front face of the outer shell. A space which can be used as a spare blade box is arranged on the back face of the outer shell. A push button seat is contained in the outer shell. A push button is fixedly arranged on the push button seat. A bottom protrusion is formed on the push button seat. A front concave face is formed on the bottom protrusion. The blade seat is provided with a lower support point, a side protrusion, a side stopping block, a blade mounting piece, a lower support point and a blade seat tension spring. The bottom protrusion is provided with a back tip point. The back tip point can be contained in the front concave face on the bottom protrusion.

Description

A kind of cutter

Technical field

The utility model relates to a kind of cutter, especially relevant for both had in a kind of cutter shell can automatic drawing back main blade, have simultaneously the cutter of spare blade box.

Background technology

Cutter is a kind of hand tools commonly used, can be used for cutting such as wood, paper, leather, plastic sheet, electric wire or cardboard.Cutter generally all has the shell that is assembled by two and half shells.Shell both simultaneously also was used for holding blade as handle of a knife.Offer a slit on the shell, by the slit push button is installed, push button is used for moving blade.

In order to prevent injury personnel behind cutting object, some cutter has the blade of auto retractable.When this cutter discharges push button behind user's cutting object among the retraction shell.But, if the user is because notice is concentrated not or relatively more clumsy and do not discharge timely push button after cutting, but finger is still by being pressed on the push button, so at this moment brandishes this cutter with regard to the user that easily hurts or other people.

At United States Patent (USP) 7,765,701 and U.S. Patent application 12/149, disclose a kind of cutting tool that is retractable into sheet that has in 692, the blade of this cutting tool the knife edge of blade leave be cut object after the user of a clumsiness may scratch own or other people before, can be retracted among the shell automatically.These two kinds of cutting tools all have the stock that a blade bearing that long-tail arranged and tail end are formed with a hook, and stock is promoted by push button.In use, the user can promote forward push button, and hook will drive long-tail and blade bearing forward.In the time of the blade cuts workpiece, the blade bearing long-tail that rotates leaves hook on the stock.When blade left workpiece, blade bearing restored under the effect of spring.After the user discharged push button, stock restored under the effect of another spring and again closes with the fastener of long-tail, in order to using next time.

For present cutter, the spare blade box that has an one in the inside of cutter shell own has become a kind of trend.The cutter that does not have an one spare blade box can bring a lot of inconvenience using.Yet all existing automatic contraction cutters are all without the spare blade box.Long-tail and stock have occupied most of space at cutter shell rear portion, and cutter shell rear portion generally all is intended for the spare blade box.Because the rotation of blade is very small in cutting process, the stroke the when hook when cutting on the stock and the long-tail on the blade bearing break off relations must be through the amplification of leverage.In other words, too little in the distance between push button and the blade bearing before and after the cutting if do not have long-tail and stock, can't allow firm the fastening with blade bearing of push button.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of cutter of blade auto retractable, its blade leave after the cut workpiece and just can the automatic retraction shell before the user discharges the push broach push button among, and this cutter can have enough spaces as the spare blade box in the situation that do not increase overall volume in the cutter shell.

Technical problem to be solved in the utility model provides a kind of cutter of blade auto retractable, and this cutter can stretch out fully and stably stop at any desired location between the retracted state fully.

In order to solve the problems of the technologies described above, the utility model provides a kind of cutter, and it includes:

A shell, this shell have the right side half shell that a left side half shell, one and left half shell snap together, the slit of stretching out for main blade that forwardly forms, spare blade storage area and the lower casing that can cover described memory space that forms at the rear portion;

The push button seat that can be contained within the described shell with slidably reciprocating, the push button seat has that an end is fixed on the push button seat and the other end is fixed at the bottom of push button extension spring on the inner surface of outer cover, one or more side rib and one prominently, is formed with a front concave surface on the end is prominent;

One is exposed described shell and is fixedly arranged on push button on the push button seat;

A blade bearing that is contained within the described shell, described blade bearing has a upper fulcrum, a pleurapophysis, the side block piece, a blade installation sheet, a lower cusp, a lower fulcrum, and end is fixed on the described blade bearing and the other end is fixed in the blade bearing extension spring on the described inner surface of outer cover, the blade installation sheet has a rear end and a front end, described rear end is fixed on the described blade bearing, described front end has a side shoot and blade is installed projection, and pleurapophysis has a front slope and one can be contained in rear cusp in the front concave surface of push button seat;

An allowing blade replacement device, it comprises that one is formed on the inner surface of outer cover and the inwardly projecting of the side shoot on the blade installation sheet and a tool changing button, and this tool changing button has the front end that has one section slight distance between pair of pivot, rear end and and the shell; And,

A lock blade apparatus, it comprises that one is contained in the draw runner in the shell, button and a side block piece that is formed on the blade bearing that is exposed to outside the shell.

The beneficial effect that the utility model brings is after the lever amplification effect of having cancelled long-tail and stock, contact area between the prominent and pleurapophysis in the end becomes very little, because it is little a lot of when long-tail is arranged that the stroke of the pleurapophysis that produces owing to the rotation of blade bearing becomes, but the prominent front concave structure in the rear cusp of pleurapophysis and the end can guarantee only just to realize fastening reliably by very little contact area, as a result of, long-tail and stock can be omitted in order to save the space as the spare blade box.

Description of drawings

Fig. 1 is the schematic perspective view of the preferred embodiment of the utility model cutter.

Fig. 2 is three-dimensional explosive view embodiment illustrated in fig. 1.

The schematic perspective view of the blade bearing of cutter shown in Figure 2 part during Fig. 3.

Fig. 4 a to Fig. 4 e is the three-dimensional part schematic diagram of the cutter course of work.

Fig. 5 a is the schematic perspective view of blade exchange process.And,

Fig. 5 b is the amplification schematic perspective view of blade and blade bearing part in the blade exchange process shown in Fig. 5 a.

The specific embodiment

With reference to figure 1 and Fig. 2, it shows the preferred embodiment of the utility model cutter.This cutter has a shell 10, and the right side half shell 12 that shell 10 is snapped together by a left side half shell 11, and left half shell 11 and one and left and right half shell 11,12 lower casings that snap together 13 consist of.This cutter also comprises a main blade 20 that slidably is contained within the shell 10 and can stretches out from the slit 14 of shell 10 fronts, a push button seat 30 that is contained in the shell 10 and can slidably reciprocates along shell 10, one is stretched out outside the shell 10 and is fixed in and is used for controlling the push button 40 that main blade 20 stretches out on the push button seat 30, one end is fixed on the push button seat 30 and the other end is fixed in the push button extension spring 31 on shell 10 inner surfaces, one is contained in the blade bearing 50 that is used for installing main blade 20 within the shell 10 slidably, 51, one allowing blade replacement devices 60 of a blade bearing extension spring and a lock blade apparatus 70.Shell 10 both as the container of blade simultaneously also as handle of a knife.

As shown in Figure 2, push button 40 is fixed on the push button seat 30, and when push button 40 was pushed forward, push button seat 30 is corresponding moving forward also, spurs simultaneously push button extension spring 31.Push button extension spring 31 can retract push button seat 30 after the user discharges push button 40.As shown in Figure 3, prominent 32 and one or more side rib 33 at the bottom of push button seat 30 has one, be provided with one or more chute 15 at left and right half shell 11,12 inner surface, side rib 33 slides in chute 15 and can guarantee the stability of push button seat 30 when shell 10 interior the slip.Has a front concave surface 320 at the end of push button seat 30 prominent 32.

Blade bearing 50 can be in shell 10 interior longitudinal sliding motions.Blade bearing 50 has a upper fulcrum 52, a pleurapophysis 53, a side block piece 54, a blade installation sheet 55, a lower cusp 56 and a lower fulcrum 57.Blade installation sheet 55 has a rear end 551 and a front end 552, rear end 551 is fixed on the blade bearing 50 by a riveting set 553, front end 552 has a side shoot 554 and a blade is installed projection 555, and blade is installed the breach 21 of projection 555 after main blade 20 is installed and on the main blade 20 and fastened.Blade installation sheet 55 is made such as steel by the material with certain elasticity and intensity.The front end 510 of blade bearing extension spring 51 is fixed on the blade bearing 50 and rear end 511 is fixed on the shell 10, and rear end 511 will be higher than front end 510.Blade bearing 50 can be provided with one or more floor 58, is provided with one or more chute (not shown) at left and right half shell 11,12 inner surface, and floor 58 slides in chute and can guarantee the stability of blade bearing 50 when shell 10 interior the slip.Pleurapophysis 53 has cusp 531 behind a front slope 530 and, and rear cusp 531 can be contained in the front concave surface 320 of push button seat 30.Can establish a gang saw tooth 16 on the inner surface of shell 10, the lower cusp 56 above the blade bearing 50 can engage with sawtooth 16.

With reference to figure 1,2,4a, the rear portion of shell 10 has formed a space 17 that can be used as the spare blade box, and lower casing 13 is as the lid in this space 17.Spare blade 22 can be placed in this space 17.Lock blade apparatus 70 comprises that one is contained in draw runner 71 in the shell 10, one and is exposed to and is used for button 72 and side block piece 73 that is formed on the blade bearing 50 that control draw runner 71 slides at shell 10 outside the shell 10.In the time of locking main blade 20, the user can be allocated to button 72 latched position, in the course of these position draw runner 71 approaching side blocks 73.This moment, side block piece 73 was blocked by draw runner 71, so blade bearing 50 can't continue to move forward with respect to shell 10.Main blade 20 can't protract, and cutter namely is in a safe condition.When the user was allocated to an open position with button 72, draw runner 71 left the course of side block piece 73, and blade bearing 50 and the draw runner 71 on it can freely move ahead, and main blade 20 can stretch out, and cutter namely is in the use state.Lock blade apparatus 70 is prior aries, does not make a more detailed description at this.

With reference to figure 4a, below will introduce in detail the working method of the utility model cutter.At the stand-by state shown in Fig. 3, push button seat 30 and be fixed on push button 40 on the push button seat 30 and be subjected to push button extension spring 31 pulling force and rest on the side block piece 54 of blade bearing 50.Forward again Fig. 4 b to, its demonstration be the duty of cutter.Push button 40 is pushed into an operating position by user's thumb.Being fixed in push button seat 30 on the push button 40 also resists simultaneously push button extension spring 31 and moves forward.When push button seat 30 moved, the front concave surface of push button seat 30 320 promotes pleurapophysis 53 metacone points 531, promote blade bearing 50 simultaneously resisted blade bearing extension springs 51 and moves forward.

Further with reference to figure 4c, when the user uses the main blade 20 cut workpiece (not shown) that stretches out, the point of a knife of main blade 20 partly is subject to a power P who makes progress, and this power P can promote blade master 20 and blade bearing 50 and rotate around the upper fulcrum 52 of blade bearing 50.When blade bearing 50 rotates, the rear cusp 531 on blade bearing 50 pleurapophysis 53 will leave the front concave surface 320 on the push button seat 30, and the lower cusp 56 of blade bearing 50 begins to contact the gang saw tooth 16 on the shell 10 and stopped by sawtooth 16 simultaneously.As long as push away and turn round 40 and pushed away by the user and to rest on above-mentioned operating position, blade bearing 50 and any movement of being fixed on the main blade 20 on the blade bearing 50 just all can by with shell 10 on the lower cusp 56 of sawtooth 16 interlocks place restrictions on.

Shown in Fig. 4 d, in case main blade 20 leaves workpiece after cutting, power P will disappear.Blade bearing 50 will under the effect of the restoring force that blade bearing extension spring 51 makes progress around on fulcrum 52 counter-rotating.In this counter-rotating, the lower cusp 56 of blade bearing 50 will leave sawtooth 16, and blade bearing 50 will be got back to the stand-by state shown in the figure under the pulling of blade bearing extension spring 51.So the main blade 20 that can see the utility model cutter can leave workpiece and user at main blade 20 and have a mind to discharge push button 40 and regain before the main blades 20 among the automatic retraction shell 10.

After blade bearing 50 rested on the spare space, the user can discharge push button 40.At this moment push button 40 and push button seat 30 will be pulled back by push button extension spring 31.In the process that push button seat 30 moves backward, the end of push button seat 30 prominent 32, will 53 slips along blade bearing 50 towards pleurapophysis.When the end prominent 32 runs into front slope 530 on the pleurapophysis 53, blade bearing 50 will be promoted to rotate around the lower fulcrum 57 antagonism blade bearing extension springs 51 on it by the end prominent 32.When the end prominent 32 through after the pleurapophysis 53, blade bearing 50 will under the effect of the upwards restoring force of blade bearing extension spring 51 around on fulcrum 52 counter-rotatings, the rear cusp 531 on the pleurapophysis 53 reenters the front concave surface 320 at the end prominent 32 simultaneously.So just having returned to the stand-by state shown in Fig. 4 a, cutter of the present utility model can prepare use next time.As shown in Figure 2, be close at blade bearing 50 on the surface of main blade 20 a powerful magnet block 80 can also be installed, iron blade can not rocked after being installed on the blade mount pad 50.

With reference to figure 5a and 5b, the course of work of allowing blade replacement device 60 is described below.Allowing blade replacement device 60 comprises that one is formed on shell 10 inner surfaces and the inwardly projecting 61 of the side shoot on blade installation sheet 55 554 and a tool changing button 62.Tool changing button 62 has a pair of rotating front end 65 that is installed in pivot 63 on the shell 10, has one section slight distance between the rear end 64 on push button seat 30 courses and and shell 10.Specifically shown in Fig. 5 a, when the user need to change main blade 20, it can be pressed the front end of tool changing button 62, and at this moment the rear end 64 of tool changing button 62 will move up and leave the course of push button seat 30.Push button seat 30 just can be pushed ahead at this moment, until side shoot 554 runs into inwardly projecting 61.Continue to promote push button 40, because blade installation sheet 55 has certain elasticity, the front end that side shoot 554 will be crossed inwardly projecting 61 and promote blade installation sheet 55 departs from blade bearing 50 and main blade 20.Shown in Fig. 5 b, when push button 40 is pushed to one foremost the time, departing from of blade installation sheet 55 just in time can be so that the blade on it be installed the breach 21 that projection 555 is separated from main blade 20.Main blade 20 just can be extracted and change from blade bearing 50.After the replacing, the user can discharge push button 40 and press the rear end 64 of tool changing button 62, and rear end 64 rearmings are in order to using.

Claims

1. cutter is characterized in that including:

A shell (10), this shell (10) have the right side half shell (12) that a left side half shell (11), one and left half shell (11) snap together, the slit (14) of stretching out for main blade (20) that forwardly forms, spare blade (22) storage area (17) and the lower casing (13) that can cover described memory space (17) that forms at the rear portion;

The push button seat (30) that can be contained within the described shell (10) with slidably reciprocating, described push button seat (30) has that an end is fixed on the push button seat (30) and the other end is fixed in prominent (32) at the bottom of push button extension spring (31) on shell (10) inner surface, one or more side rib (33) and one, is formed with a front concave surface (320) on the described end prominent (32);

One is exposed described shell (10) and is fixedly arranged on push button (40) on the push button seat (30);

A blade bearing (50) that is contained within the described shell (10), described blade bearing (50) has a upper fulcrum (52), a pleurapophysis (53), side block piece (54), a blade installation sheet (55), a lower cusp (56), a lower fulcrum (57), and end is fixed on the described blade bearing (50) and the other end is fixed in the blade bearing extension spring (51) on described shell (10) inner surface, described blade installation sheet (55) has a rear end (551) and a front end (552), described rear end (551) is fixed on the described blade bearing (50), described front end (552) has a side shoot (554) and blade is installed projection (555), and described pleurapophysis (53) has a front slope (530) and one can be contained in rear cusp (531) in the front concave surface (320) of push button seat (30);

An allowing blade replacement device (60), it comprises that one is formed on shell (10) inner surface and the inwardly projecting (61) of the side shoot (554) on blade installation sheet (55) and a tool changing button (62), and this tool changing button (62) has the front end (65) that has one section slight distance between pair of pivot (63), a rear end (64) and and the shell (10); And,

A lock blade apparatus (70), it comprises that one is contained in the draw runner (71) in the shell (10), button (72) and a side block piece (73) that is formed on the blade bearing (50) that is exposed to outside the shell (10).

2. cutter as claimed in claim 1 is characterized in that also having a gang saw tooth (16) on the described shell (10), and blade bearing (50) also has a lower cusp (56) that can engage with sawtooth.