CN210233106U - Safety cutter - Google Patents

Abstract

The utility model discloses a safety cutter, including knife shell, blade, knife rest, leading truck and ejector pad, blade detachably locates on the knife rest, and the knife rest locates in the inner chamber of knife shell slidably to can drive the blade stretch out or retract to the knife shell, the leading truck sets firmly in the inner chamber of knife shell, and the leading truck opens and is equipped with the guide way with knife rest sliding fit, and the top of leading truck extends inwards and forms the limiting plate, and when the knife rest was located the guide way, form the clearance that extends along the slip direction of knife rest between the bottom surface of limiting plate and the top surface of knife rest, the limiting plate was seted up a plurality of spacing breachs; the push block is movably arranged at the top of the knife rest, part of the push block is exposed out of the knife shell, an elastic piece is arranged between the push block and the knife rest, a convex block is arranged on the side face of the push block, when the elastic piece is in a natural extension state, the convex block is matched with any one limiting notch, and when the elastic piece is in a compressed state, the convex block is positioned in a gap. The safety cutter can adjust the length of the cutter.

Description

Safety cutter

Technical Field

The utility model relates to a safe cutter.

Background

The safety cutter is one of hand-held safety cutters, the blade of the safety cutter can retract into the cutter shell, and the blade of the safety cutter can extend out of the cutter shell when the safety cutter is used, so that the safety is improved.

However, the length of the existing safety cutter cannot be flexibly adjusted according to the actual cutting depth, so that the safety cutter is inconvenient to use and the application range of the safety cutter is limited.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a safe cutter which can adjust the length of a cutter.

The purpose of the utility model is realized by adopting the following technical scheme:

the safety cutter comprises a cutter shell, a blade, a cutter frame, a guide frame and a push block, wherein the blade is detachably arranged on the cutter frame, the cutter frame is slidably arranged in an inner cavity of the cutter shell so as to drive the blade to extend out of or retract into the cutter shell, the guide frame is fixedly arranged in the inner cavity of the cutter shell, a guide groove in sliding fit with the cutter frame is formed in the guide frame, the top of the guide frame extends inwards to form a limiting plate, when the cutter frame is arranged in the guide groove, a gap extending along the sliding direction of the cutter frame is formed between the bottom surface of the limiting plate and the top surface of the cutter frame, and the limiting plate is provided with a plurality of limiting notches sequentially arranged along the sliding direction of the cutter frame; the push block is movably arranged at the top of the knife rest, part of the push block is exposed out of the knife shell, an elastic part is arranged between the push block and the knife rest, the elastic part is used for providing elastic force for the push block to move along the direction far away from the knife rest, a convex block is arranged on the side face of the push block, when the elastic part is in a natural extension state, the convex block is matched with any one of the limiting notches, and when the elastic part is in a compressed state, the convex block is located in the gap.

Furthermore, the limiting plates are arranged on two sides of the top of the guide frame, an outward convex elastic sheet is arranged on one side, away from the convex block, of the tool rest, and the elastic sheet is matched with any limiting notch on one side, away from the convex block.

Further, the knife rest is provided with a mounting groove for mounting the push block, a buckle groove penetrating through the upper end and the lower end of the knife rest is formed in the bottom wall of the mounting groove, a first limiting block is arranged in the buckle groove, a first buckle is arranged at the bottom of the push block, a first bending portion is formed at the end portion of the first buckle, and when the elastic piece is in a natural extension state, the first bending portion is abutted to the bottom surface of the first limiting block.

Furthermore, the bottom wall of the mounting groove is further provided with a positioning block, the positioning block is provided with a positioning hole in clamping fit with the first end of the elastic piece, and the bottom of the push block is further provided with a limiting column in clamping fit with the other end of the elastic piece.

Further, the knife shell comprises a knife body and a knife sleeve detachably arranged at the front end of the knife body, and the knife sleeve is provided with a first opening for the blade to extend out.

Furthermore, a second opening for the push block to extend out is formed in the top of the knife body, a second buckle is arranged on the knife sleeve, a second bending part is arranged at the end part of the second buckle, and when the knife sleeve is connected with the front end of the knife body, the second buckle extends into the inner cavity of the knife body and is abutted against the side wall of the second opening; the top of knife rest is equipped with the chucking piece, works as the blade is located when the inner chamber of tool case, knife rest, chucking piece with form between the second buckle and dodge the space, dodge the space and be used for supplying the second portion of buckling with unblock between the second open-ended lateral wall, work as the blade stretches out to when the tool case is outer, the top surface of chucking piece with the bottom surface chucking cooperation of second buckle.

Further, the front end of the bottom surface of the second buckle is provided with a first inclined surface, and the front end of the top surface of the clamping block is provided with a second inclined surface matched with the first inclined surface.

Furthermore, the front end of the knife rest is provided with a limiting groove used for being connected with the blade, the bottom wall of the limiting groove is provided with a second limiting block, the blade is provided with a first limiting hole matched with the second limiting block, and the front end of the knife rest is further provided with a third limiting block positioned above the limiting groove.

Further, the knife shell also comprises a knife handle inserted at the rear end of the knife body.

Further, the handle of a knife includes first casing and second casing, one of them is equipped with the draw-in groove in first casing and the second casing, the other be equipped with draw-in groove complex arch, the front end of first casing or second casing be equipped with the card post of guide way block tight fit.

Compared with the prior art, the beneficial effects of the utility model reside in that:

when the elastic piece is in a natural extension state, the lug is matched with any one limiting notch to play a role of limiting the lug, so that the sliding of the tool rest can be limited, the blade is kept in a stable state of retracting into the inner cavity of the tool shell or extending out of the tool shell, the safety of the safety tool or the normal use of the tool is ensured, when the elastic piece is in a compressed state, the lug is positioned in a gap, at the moment, the lug can be switched between matching with a plurality of different limiting notches by pushing the push block to move along the direction in which the blade extends out of the tool shell, and then the state adjustability or the tool discharging length adjustability of the blade is realized, and because the plurality of limiting notches are sequentially arranged along the sliding direction of the tool rest, the lug is matched with any one limiting notch, so that the blade can be in different states or have different tool discharging lengths, the cutter has the advantages that the cutter can be adjusted in length when the cutter is stably retracted into the inner cavity of the cutter shell, and the safe cutter can be flexibly used more conveniently.

Drawings

FIG. 1 is a schematic structural view of the safety cutter of the present invention;

FIG. 2 is a schematic view of the internal structure of the safety cutter shown in FIG. 1;

FIG. 3 is a schematic view of the back structure of the safety cutter shown in FIG. 2, wherein the guide frame is not shown for ease of understanding;

FIG. 4 is an exploded view of the safety knife shown in FIG. 1;

fig. 5 is a cross-sectional view of the safety cutter shown in fig. 1.

In the figure: 1. a knife housing; 11. a blade body; 111. a second opening; 12. a knife cover; 121. a second buckle; 1211. a second bending portion; 1212. a first inclined surface; 122. a first opening; 13. a knife handle; 131. a through hole; 132. a first housing; 1321. a card slot; 1322. clamping the column; 1323. a third buckle; 133. a second housing; 2. a blade; 3. a push block; 31. a bump; 32. a first buckle; 321. a first bending portion; 33. a limiting column; 4. a tool holder; 41. mounting grooves; 42. a first stopper; 43. positioning holes; 44. a clamping block; 441. a second inclined surface; 45. positioning a groove; 46. a second limiting block; 47. a third limiting block; 5. a guide frame; 51. a guide groove; 52. a limiting plate; 521. a limiting notch; 53. a second limiting hole; 6. a spring; 7. a spring plate; 71. a free end.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

Referring to fig. 1 to 5, a safety tool according to a preferred embodiment of the present invention is shown, which includes a tool housing 1, a blade 2, a pushing block 3, a tool rest 4 and a guiding frame 5, wherein the blade 2 is detachably disposed on the tool rest 4, the tool rest 4 is slidably disposed in an inner cavity of the tool housing 1 to drive the blade 2 to extend out of or retract back into the tool housing 1, the tool housing 1 is provided with a fixing groove, the guiding frame 5 is made of a hardware material to reinforce the structural strength of the safety tool, the guiding frame 5 is inserted into the fixing groove and tightly fitted with the fixing groove to fix the guiding frame 5 in the inner cavity of the tool housing 1, the guiding frame 5 is provided with a guiding groove 51 slidably fitted with the tool rest 4 to guide the tool rest 4, a top of the guiding frame 5 extends inward to form a limiting plate 52, when the tool rest 4 is disposed in the guiding groove 51, a gap extending along a sliding direction of the tool rest 4 is formed between a bottom surface of the limiting plate 52 and a top surface of the tool rest 4, the limiting plate 52 is provided with a plurality of limiting notches 521 which are sequentially arranged along the sliding direction of the tool rest 4; the push block 3 is movably arranged at the top of the knife rest 4, part of the push block is exposed out of the knife shell 1, an elastic part is arranged between the push block 3 and the knife rest 4, the elastic part is used for providing elastic force for the push block 3 to move along the direction away from the knife rest 4, a convex block 31 is arranged on the side face of the push block 3, when the elastic part is in a natural extension state, the convex block 31 is matched with any one limiting notch 521, and when the elastic part is in a compressed state, the convex block 31 is positioned in a gap.

The safety cutter of the utility model, when the elastic component is in the natural extension state, the bump 31 is matched with any one of the limit notches 521 to play the role of limiting the bump 31, thereby limiting the sliding of the cutter frame 4, keeping the blade 2 in the stable state of retracting to the inner cavity of the cutter housing 1 or extending out of the cutter housing 1, ensuring the safety of the safety cutter or the normal use of the cutter, when the elastic component is in the compressed state, the bump 31 is positioned in the gap, at the moment, the bump 31 can be switched between matching with a plurality of different limit notches 521 by pushing the push block 3 to move along the direction of extending the blade 2 out of the cutter housing 1, thereby realizing the state adjustability or the cutter-out length adjustability of the blade 2, and because the plurality of limit notches 521 are arranged along the sliding direction of the cutter frame 4 in sequence, the bump 31 is matched with any one of the limit notches 521, can make blade 2 be in different states or have different play sword length, when having guaranteed that blade 2 is stably in the state of retracting to the inner chamber of sword shell 1, still can make the play sword length of blade 2 adjustable, the nimble use of this safety cutter of being convenient for more.

In order to facilitate accurate positioning of the protrusion 31 and the limiting notches 521, the two sides of the top of the guide frame 5 are provided with the limiting plates 52, one side of the tool rest 4, which is far away from the protrusion 31, is provided with the elastic sheet 7 protruding outwards, the elastic sheet 7 is matched with any one of the limiting notches 521, which is far away from the protrusion 31, and the distance between the two adjacent limiting notches 521 matched with the elastic sheet 7 is equal to the distance between the two adjacent limiting notches 521 matched with the protrusion 31, so that when the elastic sheet 7 is matched with the corresponding limiting notch 521, collision sound or resistance is generated due to the matching of the elastic sheet 7 and the limiting notch 521, and the collision sound or the resistance feeds back a bump 31 to be just below the corresponding limiting notch 521 to a user, at the moment, the user can release the push block 3, so that the push block 3 moves in the direction far away from the tool rest 4 under the elastic force of the elastic member, so that the protrusion 31, it can be understood that, since the elastic sheet 7 is an elastic member, when the pushing block 3 is pushed to move continuously, the elastic sheet can be disconnected from the corresponding limiting notch 521 under the action of its own elastic force, and does not obstruct the movement of the pushing block 3.

As shown in fig. 3, the positioning groove 45 is provided at the bottom of the guide frame 5, the opening communicated with the positioning groove 45 is provided at the side surface of the guide frame 5, the elastic sheet has two free ends 71 and a protruding portion for matching with the corresponding limiting notch 521, the two free ends 71 are abutted against the side wall of the positioning groove 45, and the protruding portion extends out of the guide frame 5 along the opening. With such an arrangement, when the protruding portion of the elastic piece is engaged with the corresponding limiting notch 521, the elastic piece is in a natural state, and when the protruding portion of the elastic piece is separated from the corresponding limiting notch 521 due to the continuous movement of the pushing block 3, the two free ends 71 of the elastic piece are opened under the resistance of the guide frame 5, so that the protruding portion slightly retracts into the positioning groove 45 to be separated from the corresponding limiting notch 521, and the movement of the pushing block 3 is not hindered.

Referring to fig. 4 and 5, a mounting groove 41 for mounting the pushing block 3 is provided at the top of the knife rest 4, a fastening groove penetrating through the upper end and the lower end of the knife rest 4 is provided at the bottom wall of the mounting groove 41, a first limiting block 42 is provided in the fastening groove, a first fastening 32 is provided at the bottom of the pushing block 3, a first bending portion 321 is formed at the end of the first fastening 32, when the elastic member is in a natural extension state, the first bending portion 321 abuts against the bottom surface of the first limiting block 42, and the function of limiting the pushing block 3 is achieved, so that the pushing block 3 can be prevented from being disconnected from the knife rest 4.

Specifically, the bottom wall of the mounting groove 41 is further provided with a positioning block, the positioning block is provided with a positioning hole 43 in clamping fit with the first end of the elastic element, and the bottom of the push block 3 is further provided with a limiting column 33 in clamping fit with the other end of the elastic element. By the arrangement, the reliable connection between the push block 3, the knife rest 4 and the elastic piece is ensured. It will be appreciated that the resilient member may be a spring 6 or an elastic rubber sleeve, and in this embodiment, the resilient member is preferably a spring 6.

As shown in fig. 4 and 5, the knife case 1 includes a knife body 11 and a knife pouch detachably disposed at the front end of the knife body 11, the knife pouch is provided with a first opening 122 for the blade 2 to extend out, and the knife case 1 is divided into two bodies, so that the knife pouch can be conveniently detached to replace the blade 2 while the knife case 1 is processed and installed.

As shown in fig. 5, a second opening 111 for extending the push block 3 is formed at the top of the knife body 11, a second buckle 121 is arranged on the knife sleeve, a second bending portion 1211 is arranged at the end of the second buckle 121, and when the knife sleeve is connected with the front end of the knife body 11, the second buckle 121 extends into the inner cavity of the knife body 11 and abuts against the side wall of the second opening 111, so that the knife sleeve can be mounted and dismounted quickly; the top of the knife rest 4 is provided with a clamping block 44, when the blade 2 is located in the inner cavity of the knife shell 1, an avoiding space is formed among the knife rest 4, the clamping block 44 and the second buckle 121, the avoiding space is used for unlocking between the second bending portion 1211 and the side wall of the second opening 111, and when the blade 2 extends out of the knife shell 1, the top surface of the clamping block 44 is in clamping fit with the bottom surface of the second buckle 121. So, when blade 2 needs to be changed, only need to dial out the broach shell forward and can realize the break away from between broach shell and the blade 11 and be connected, need not unscrew the front end accessory, it is more convenient to operate, and when this safety cutter is in the user state, because the top surface of chucking piece 44 cooperates with the bottom surface chucking of second buckle 121, make broach shell 12 straining blade 11 form the auto-lock, make broach shell 12 and blade 11 form integratively, when can prevent to take place the accident when going out the sword, still can prevent that broach shell 12 from losing. Of course, the connection between the knife cover 12 and the knife body 11 can also adopt a mode of connecting internal threads and external threads or a mode of connecting a clamping groove and a clamping tenon.

With reference to fig. 5, the front end of the bottom surface of the second buckle 121 is provided with a first inclined surface 1212, and the front end of the top surface of the clamping block 44 is provided with a second inclined surface 441 matched with the first inclined surface 1212, so that the guiding function can be achieved, and the clamping fit or the disengagement between the second buckle 121 and the clamping block 44 is more convenient.

For realizing dismantling between blade 2 and the knife rest 4 and being connected, the spacing groove that is used for being connected with blade 2 is offered to the front end of knife rest 4, the diapire of spacing groove is equipped with second stopper 46, blade 2 offer with the first spacing hole of second stopper 46 complex, the front end of knife rest 4 still is equipped with the third stopper 47 that is located the top of spacing groove, through the spacing groove, second stopper 46 and the spacing effect of third stopper 47 to blade 2, when having guaranteed the reliable connection between blade 2 and the knife rest 4, still can not hinder the dismantlement of blade 2, make the dismantlement and the installation of blade 2 very convenient. Of course, the blade 2 and the blade holder 4 can be connected by screws, as long as the blade 2 can be replaced conveniently.

Continuing to refer to fig. 4, for the convenience of holding, the knife housing 1 further includes a knife handle 13 disposed at the rear end of the knife body 11, specifically, a part of the knife handle 13 is tightly fitted with the guide groove 51, so that the connection between the knife handle 13 and the guide frame 5 can be reliable, and for the convenience of hanging the safety knife, the knife handle 13 is provided with a through hole 131.

Specifically, the tool holder 13 includes a first housing 132 and a second housing 133, one of the first housing 132 and the second housing 133 is provided with a clamping slot 1321, and the other is provided with a protrusion matching with the clamping slot 1321, so that the first housing 132 and the second housing 133 are reliably connected, and the front end of the first housing 132 or the second housing 133 is provided with a clamping column 1322 tightly matching with the guiding slot 51, so that the tool holder 13 is reliably arranged at the rear end of the tool body 11.

Preferably, in order to ensure a stable connection between the knife handle 13 and the guiding frame 5, the first housing 132 further has a third buckle 1323, and the guiding frame 5 has a second limiting hole 53 buckled with the third buckle 1323.

The utility model discloses a safe cutter has following advantage:

(1) the length of the blade 2 can be adjusted;

(2) when in use, the knife cover 12 and the knife body 11 can be ensured not to be separated;

(3) the guide frame 5 is embedded in the safety cutter, so that the structural stability of the safety cutter is greatly enhanced, and the lateral pressure in use can be better resisted.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (10)

1. The safety cutter is characterized by further comprising a guide frame and a push block, the guide frame is fixedly arranged in the inner cavity of the cutter shell, a guide groove in sliding fit with the cutter frame is formed in the guide frame, the top of the guide frame extends inwards to form a limiting plate, when the cutter frame is arranged in the guide groove, a gap extending along the sliding direction of the cutter frame is formed between the bottom surface of the limiting plate and the top surface of the cutter frame, and the limiting plate is provided with a plurality of limiting notches sequentially arranged along the sliding direction of the cutter frame; the push block is movably arranged at the top of the knife rest, part of the push block is exposed out of the knife shell, an elastic part is arranged between the push block and the knife rest, the elastic part is used for providing elastic force for the push block to move along the direction far away from the knife rest, a convex block is arranged on the side face of the push block, when the elastic part is in a natural extension state, the convex block is matched with any one of the limiting notches, and when the elastic part is in a compressed state, the convex block is located in the gap.

2. The safety tool according to claim 1, wherein the limiting plates are disposed on both sides of the top of the guiding frame, an outwardly protruding spring is disposed on one side of the tool holder away from the protrusion, the spring is engaged with any one of the limiting notches disposed on one side away from the protrusion, and a distance between two adjacent limiting notches engaged with the spring is equal to a distance between two adjacent limiting notches engaged with the protrusion.

3. The safety tool according to claim 1, wherein the tool holder is provided with a mounting groove for mounting the push block, a fastening groove penetrating through the upper end and the lower end of the tool holder is formed in the bottom wall of the mounting groove, a first stopper is arranged in the fastening groove, a first fastening is arranged at the bottom of the push block, a first bending portion is formed at the end of the first fastening, and when the elastic member is in a natural extension state, the first bending portion abuts against the bottom surface of the first stopper.

4. The safety cutter according to claim 3, wherein the bottom wall of the mounting groove is further provided with a positioning block, the positioning block is provided with a positioning hole in clamping fit with the first end of the elastic member, and the bottom of the push block is further provided with a limiting column in clamping fit with the other end of the elastic member.

5. The safety cutter according to claim 1, wherein the cutter housing comprises a cutter body and a cutter sleeve detachably disposed at a front end of the cutter body, and the cutter sleeve is provided with a first opening for the blade to protrude.

6. The safety cutter according to claim 5, wherein a second opening for the push block to extend out is formed at the top of the cutter body, the cutter sleeve is provided with a second buckle, a second bending part is arranged at the end part of the second buckle, and when the cutter sleeve is connected with the front end of the cutter body, the second buckle extends into the inner cavity of the cutter body and abuts against the side wall of the second opening; the top of knife rest is equipped with the chucking piece, works as the blade is located when the inner chamber of tool case, knife rest, chucking piece with form between the second buckle and dodge the space, dodge the space and be used for supplying the second portion of buckling with unblock between the second open-ended lateral wall, work as the blade stretches out to when the tool case is outer, the top surface of chucking piece with the bottom surface chucking cooperation of second buckle.

7. The safety cutter according to claim 6, wherein the front end of the bottom surface of the second catch is provided with a first inclined surface, and the front end of the top surface of the catch block is provided with a second inclined surface adapted to the first inclined surface.

8. The safety tool according to claim 1, wherein a limiting groove for connecting with the blade is formed at the front end of the tool rest, a second limiting block is arranged on the bottom wall of the limiting groove, a first limiting hole matched with the second limiting block is formed in the blade, and a third limiting block positioned above the limiting groove is further arranged at the front end of the tool rest.

9. The safety cutter of claim 5, wherein the housing further comprises a shank disposed at a rear end of the blade.

10. The safety cutter according to claim 9, wherein the handle comprises a first housing and a second housing, one of the first housing and the second housing is provided with a clamping groove, the other housing is provided with a protrusion matched with the clamping groove, and the front end of the first housing or the second housing is provided with a clamping column tightly matched with the guide groove.

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