CN220051926U - Art designing knife convenient for blade replacement - Google Patents

Abstract

The utility model discloses an art designer knife convenient for replacing a blade, which comprises: a shell, one side end of which is provided with a knife edge, and the top end is provided with a push button slideway; the blade pushing assembly is arranged on the shell, and the top of the blade pushing assembly is provided with a push button penetrating through the push button slideway; an elastic pin assembly provided on the blade pushing assembly; the blade is arranged in the shell, the blade head end can extend out of the blade edge, and the tail end of the blade is provided with a plug pin hole matched with the elastic pin assembly so as to detachably connect the blade to the blade pushing assembly; pressing the elastic plate, its one end is fixed on one side inner shell wall of casing, and the other end has the blade deflector, is equipped with respectively on the both sides face that is close to the position of blade deflector and presses protruding and blade dismantlement button, presses protruding and elastic pin subassembly butt, and the blade dismantlement button passes the casing and arranges. The utility knife can guide and insert the blade without opening the shell, so that the knife can easily enter the installation position, and the efficiency and operability of knife replacement assembly are improved.

Description

Art designing knife convenient for blade replacement

Technical Field

The utility model relates to the technical field of art designing cutters, in particular to an art designing cutter with blades convenient to replace.

Background

The utility knife is widely applied to office environment, industrial and mining enterprises, home decoration engineering and the like, and is used for cutting paper, cutting rubber, plastics, scraping burrs and the like.

The prior art knife with the Chinese patent publication number of CN201350635Y and the name of replaceable blade comprises a knife head part and a knife handle part, wherein the knife handle part consists of a front shell, a rear shell and a connecting shaft for connecting the front shell and the rear shell, and a buckle is arranged on the rear shell in a protruding way; the cutter head part comprises a movable plate and a blade, wherein the movable plate is positioned on the rear shell, and a containing chamber is arranged on one surface of the movable plate, which faces the front shell; the button assembly is arranged on the front shell and comprises a clamping piece positioned in the front shell, the clamping piece is buckled with the buckle, the push button assembly comprises a push button and a spring positioned at the lower end of the push button, and the part of the push button, sleeved with the spring, is positioned in the accommodating chamber. When the blade needs to be replaced, a user pushes the button assembly, the clamping piece of the button assembly is separated from the buckle, the spring piece is separated from the resisting piece due to the extension effect, and the front shell and the rear shell are in an open state; the push button assembly is pushed down to drive the blade to extend out, and the blade which is used up is taken down, so that a new blade can be replaced.

Therefore, in the above technology, when the utility knife is replaced, the front shell and the rear shell are required to be opened firstly, then the push button component is pushed to drive the blade to extend out so as to complete the replacement, the operation process is complicated, after the shell is opened, the internal parts are in the exposed state, and the internal parts can be separated and shifted in the process of replacing the blade, so that the installation of the shell after the blade is not easy to replace is completed.

Therefore, it is a great need for a person skilled in the art to provide an art knife that can perform blade replacement without opening the housing.

Disclosure of Invention

In view of the above, the present utility model provides an art designer's knife that can perform blade replacement without opening the housing.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

an art designer knife for facilitating blade replacement, comprising:

the shell is provided with a knife outlet at one side end and a push button slideway at the top end;

the blade pushing assembly is arranged on the shell in a sliding manner, and a pushing button penetrating through the pushing button slideway and sliding along the length direction of the pushing button is arranged at the top of the blade pushing assembly;

an elastic pin assembly disposed on the blade pushing assembly;

the blade is arranged in the shell, the blade head end of the blade can extend out of the blade outlet, and the tail end of the blade is provided with a plug pin hole matched with the elastic pin assembly so as to detachably connect the blade to the blade pushing assembly;

the device comprises a shell, and is characterized by comprising a shell, wherein one end of the shell is fixed on one inner shell wall of the shell, a blade guide plate is arranged at the other end of the shell, pressing protrusions and blade detaching buttons are respectively arranged on two side surfaces of the position, close to the blade guide plate, of the pressing elastic plate, the pressing protrusions can be abutted to the elastic pin assemblies, and the blade detaching buttons penetrate through the shell wall of the shell.

Compared with the prior art, the utility model has the advantages that when the blade is replaced, the blade can be pushed forward to the maximum length of the blade extending out of the shell through the outlet edge by the push button on the blade pushing component, at the moment, the elastic pin component on the blade pushing component corresponds to the pressing protrusion on the pressing elastic plate, at the moment, the blade dismounting button is pressed downwards, so that the plug pin hole at the tail end of the blade is separated from the elastic pin component, and the blade can be pulled out; when installing the blade, push down the blade dismantlement button to regard the grafting pinhole of blade place to insert the end, insert out the edge of a knife, at this moment, because of the guiding action of blade deflector, the blade inserts very easily to between the elastic pin subassembly and the elastic plate of pressing, loosens and presses the blade dismantlement button, and the elastic pin subassembly cooperates the completion fixed with the grafting pinhole on the blade of inserting again, has accomplished the change work to the blade this moment. Therefore, the utility knife does not need to open the shell to carry out the complex procedure of blade replacement, improves the blade replacement efficiency, and can guide the inserted knife due to the fact that the blade guide plate is arranged on the pressing elastic plate, so that the blade can enter the installation position more easily, and the efficiency and the operability of blade replacement assembly are improved.

Further, the blade guide plate comprises a connecting section and a bending guide section, one side of the connecting section is fixedly connected with the other end of the pressing elastic plate, the other side of the connecting section is fixedly connected with one side of the bending guide section, and the concave part of the bending guide section is a blade guide part.

The beneficial effects of adopting above-mentioned technical scheme are: the setting of linkage segment is for making the blade deflector press the fixed on the elastic plate, and the setting of blade guide part is for playing the guide effect when the blade inserts from the play edge of a knife, makes the accurate interpolation of blade press between elastic plate and the elastic pin subassembly, is convenient for fix a position the blade fast.

Further, the connecting section with the hookup location department that presses the elastic plate to give birth to is equipped with dodges the hole, be located on the casing the one side position that the button was dismantled to the blade has and presses the stroke stopper, press the stroke stopper to pass dodge the hole and arrange, be equipped with the butt face on the button is dismantled to the blade, be equipped with the backstop face on pressing the stroke stopper, the butt face can with backstop face butt.

The beneficial effects of adopting above-mentioned technical scheme are: when the blade is pressed, the abutting surface can abut against the stop surface, so that the pressing degree of the blade is limited, namely, when the blade is pressed downwards, the condition of no movement occurs, and the operation of pulling out the blade and loading the blade is indicated. Thus, the user can easily perform foolproof operation (the user can directly complete correct operation without spending attention, experience and expertise).

Further, the blade pushing assembly comprises a pushing base, the pushing base is arranged in the shell, a sliding block which is in sliding connection with the pushing button slideway is arranged at the top end of the pushing base, and the pushing button is fixed at the top end of the sliding block;

the mounting seat is fixedly connected with one side of the pushing base, and the elastic pin assembly is detachably connected to the mounting seat.

Further, a mounting groove is formed in one side face of the mounting seat, a through hole is formed in the bottom of the mounting groove, and the elastic pin assembly comprises:

the spring seat is detachably connected with one side of the mounting seat, and can seal the notch of the mounting groove;

the spring is arranged in the mounting groove, and one end of the spring is abutted against one side surface of the spring seat;

the pin is arranged in the mounting groove, the other end of the spring is in butt joint with the cap body of the pin, the column body of the pin can extend out of the through hole and is in plug connection with the plug pin hole, and the end part of the column body, which is far away from the cap body, can be in contact with the pressing protrusion.

The beneficial effects of adopting above-mentioned technical scheme are: when the blade disassembly button is pressed downwards, the pressing protrusion presses the column downwards, so that the column is not spliced with the splicing pin hole any more, at the moment, the spring is compressed, and the blade can be pulled out of the shell; when the blade is inserted, after the plug pin hole on the blade corresponds to the position of the cylinder, the blade disassembly button is loosened and pressed, and under the action of the spring, the cylinder is plugged with the plug pin hole again, so that the fixation of the blade is completed. The structure is simple and easy to operate.

Furthermore, the L-shaped hook grooves are formed in the upper and lower positions of the mounting groove on one side surface of the mounting seat, two L-shaped hook plates are fixed on one side surface of the spring seat at intervals, and the two L-shaped hook plates are respectively hooked with the two L-shaped hook grooves.

The beneficial effects of adopting above-mentioned technical scheme are: through hook groove and hook plate correspondence hook joint, when making the connection of spring holder and mount pad be in satisfying detachable function, make the difficult separation from the mount pad of spring holder again, ensured the spacing effect of spring holder to the spring.

Further, hooks are arranged at the edge of the notch of the L-shaped hook groove on one side surface of the mounting seat, two clamping holes are formed in the spring seat, and the two hooks are respectively clamped with the hole edges of the two clamping holes.

The beneficial effects of adopting above-mentioned technical scheme are: when the two L-shaped hook plates on the spring seat slide in along the two L-shaped hook grooves on the mounting seat, the hooks and the clamp Kong Goujie can indicate that the spring seat is firmly mounted on the mounting seat. And the clamping hook is matched with the clamping hole, so that the stability of the joint of the spring seat and the mounting seat is improved, and the connecting structure of the spring seat and the mounting seat is firmer and not easy to loosen.

Further, the outer side surface of the push button is provided with a push surface with a first coarse structure, and the push surface is respectively provided with a direction indication arrow for indicating the direction of the push knife and the direction of the withdrawal knife.

The beneficial effects of adopting above-mentioned technical scheme are: the pushing surface of the first coarse structure can increase the friction force of a finger of a user to push the button, so that the pushing operation is easy to carry out, and the pushing direction of the pushing button can be directly and rapidly known through the direction indication arrow, so that the pushing operation and the retracting operation can be conveniently and rapidly realized.

Further, the outer side surface of the blade detaching button is a pressing surface with a second rough structure.

The beneficial effects of adopting above-mentioned technical scheme are: the pressing friction force is increased, so that the finger is not easy to slip from the pressing surface.

Further, the top end of the shell is provided with an inward concave finger acting surface at the front end of the push button slideway;

the bottom end of the shell is provided with an inward concave hand-held contact surface corresponding to the push button slideway

The beneficial effects of adopting above-mentioned technical scheme are: when the blade is used for cutting, the thumb can be placed on the finger acting surface, so that the cutting force is convenient, the hand-held contact surface can be used for placing four fingers when the fingers are bent, the shell can be held more comfortably, the hand-held contact surface is more in line with the holding state of the actual hand-held art designing knife, and the hand-held contact surface is more easy and labor-saving for a user and is comfortable to use the art designing knife.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic three-dimensional structure of a utility knife with a blade that is easy to replace according to the present utility model when the blade is not extended out of the housing.

Fig. 2 is a schematic three-dimensional structure of the utility knife with blade convenient to be replaced according to the present utility model when the blade extends out of the housing.

FIG. 3 is an exploded view of a utility knife with a blade easy to replace according to the present utility model.

Fig. 4 is a schematic structural view of a pressing elastic plate according to the present utility model.

Fig. 5 is a schematic diagram of a connection structure between a pressing stroke limiting block and a pressing elastic plate provided by the utility model.

Fig. 6 is a schematic view of a blade pushing assembly according to the present utility model.

Fig. 7 is a partial cross-sectional view of the utility knife according to the present utility model when the blade is replaced.

Fig. 8 is a schematic structural view of a spring seat and a mounting seat provided by the utility model when not assembled.

Fig. 9 is a schematic structural view of a push button pressing portion provided by the present utility model.

Fig. 10 is a schematic structural view of a pressing surface of the blade removing button according to the present utility model.

Fig. 11 is an exploded view of the utility knife according to the present utility model.

The device comprises a 1-shell, a 11-knife edge, a 12-push button slideway, a 13-push stroke limiting block, a 131-stop surface, a 14-finger acting surface, a 15-hand holding contact surface, a 16-left shell, a 17-right shell, a 18-screw, a 19-shell pin, a 20-cylindrical pin, a 2-blade pushing component, a 21-push base, a 22-sliding block, a 23-push button, a 231-first coarse structure, a 232-direction indication arrow, a 24-mounting seat, a 241-mounting groove, a 2411-L-shaped hooking groove, a 242-through hole, a 243-clamping hook, a 3-elastic pin component, a 31-spring seat, a 311-L-shaped hooking plate, a 312-clamping hole, a 32-spring, a 33-pin, a 331-cap, a 332-cylinder, a 4-blade, a 41-plug pin hole, a 5-push elastic plate, a 51-blade guide plate, a 511-connecting section, a 512-bending guide section, a 5121-blade guide part, a 513-avoidance hole, a 52-push protrusion, a 53-blade dismounting button, a 532-abutting surface and a second coarse structure.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-11, the embodiment of the present utility model discloses a utility knife capable of completing blade replacement without opening a housing, comprising:

the shell 1, one side end of the shell 1 is provided with a knife edge 11, and the top end of the shell 1 is provided with a push button slideway 12;

the blade pushing component 2 is arranged on the shell 1 in a sliding way, and the top of the blade pushing component 2 is provided with a push button 23 which penetrates through the shell 1 and slides along the length direction of the push button;

an elastic pin assembly 3, the elastic pin assembly 3 being disposed on the blade pushing assembly 2;

the blade 4 is arranged in the shell 1, the cutter head end of the blade 4 can extend out of the cutter edge 11, and the tail end of the blade 4 is provided with a plug pin hole 41 matched with the elastic pin assembly 3 so as to detachably connect the blade 4 to the blade pushing assembly 2;

the pressing elastic plate 5, one end of the pressing elastic plate 5 is fixed on one side inner shell wall of the shell 1, a cylindrical hole 54 is formed in the pressing elastic plate and is connected with the cylindrical nail 20 on the shell wall, the other end of the pressing elastic plate 5 is provided with a blade guide plate 51, pressing protrusions 52 and blade detaching buttons 53 are respectively arranged on two side surfaces of the pressing elastic plate 5, which are close to the position of the blade guide plate 51, the pressing protrusions 52 can be abutted with the elastic pin assembly 3, and the blade detaching buttons 53 penetrate through the shell wall of the shell 1.

One embodiment of the blade-oriented deflector 51 of the present utility model is as follows: referring specifically to fig. 4, the blade guide plate 51, which presses one end of the elastic plate 5, includes: the connecting section 511 and the bending guide section 512, connecting section 511 one side and pressing the other end fixed connection of elastic plate 5, connecting section 511 opposite side and bending guide section 512 one side fixed connection, bending guide section 512's concave part is blade guide 5121, connecting section 511 has guaranteed the stability that blade deflector 51 is connected on pressing elastic plate 5, bending guide section 512 carries out the direction angle guide when inserting blade 4 from the play edge 11 through its blade guide 5121, the bending end of blade guide section 512 is crooked towards play edge 11 direction, blade guide 5121 is close to play edge place horizontal plane, when making blade 4 insert the casing through play edge, need not the user and seek the angle of insertion wanting, blade 4 is under the guiding action of bending guide section 512, alright insert the position between pressing protruding and the elastic pin subassembly 3 smoothly, then carry out the work of follow-up change blade, make blade 4 insert casing 1 to predetermined fixed position department simpler, blade change efficiency has been improved.

In the above embodiment, referring to fig. 5, the blade guide plate 51 at one end of the pressing elastic plate 5 is provided with the avoidance hole 513, the housing 1 is provided with the pressing stroke limiting block 13 at a position on one side of the blade detaching button 53, the pressing stroke limiting block 13 passes through the avoidance hole 513, the blade detaching button 53 is provided with the abutment surface 531, the pressing stroke limiting block 13 is provided with the stop surface 131, and the abutment surface 531 may abut against the stop surface 131. The pressing stroke limiting block 13 is set to be in a right-angle bending shape, the right-angle part passes through the avoiding hole 513, a right-angle edge of the blade detaching button 53 is provided with an abutting surface 531 which is parallel to the abutting surface 131 and can abut against the abutting surface, the length of the other right-angle edge which is used for pressing the right-angle structure formed by the limiting block 13 is the pressing distance of the blade detaching button 53, the user can be limited to press the blade detaching button 53 when the blade is detached, the pressing depth is prevented from being too large, the damage to the pressing elastic plate 5, the elastic pin assembly 3 and the blade 4 is prevented, the inner structure of the utility knife is protected to a certain extent, and the service life of the utility knife is prolonged.

In another embodiment of the present utility model, the blade pushing assembly 2 includes a pushing base 21, the pushing base 21 is disposed inside the housing 1, a slider 22 slidably connected to the push button slideway 12 is disposed at the top end of the pushing base 21, a push button 23 is fixed at the top end of the slider 22, and a mounting seat 24 is fixedly connected to one side of the pushing base 21.

In the above embodiment, the structure of the connection between the blade pushing component 2 and the elastic pin component 3 is shown in fig. 5, that is, the elastic pin component 3 is detachably connected to the mounting base 24, a mounting groove 241 is formed on a side surface of the mounting base 24, a through hole 242 is formed on a bottom of the mounting groove 241, and the elastic pin component 3 includes: the spring seat 31, the spring 32 and the pin 33, the spring seat 31 is detachably connected with one side of the mounting seat 24, and the spring seat 31 can seal the notch of the mounting groove 241; the spring 32 is arranged in the mounting groove 241, and one end of the spring 32 is abutted against one side surface of the spring seat 31; the pin 33 is placed in the mounting groove 241, the other end of the spring 32 is abutted with the cap 331 of the pin 33, the column 332 of the pin 33 can extend out of the through hole 242 to be inserted into the insertion pin hole 41, and the end of the column 332 far away from the cap 331 can be contacted with the pressing protrusion 52. Thus, as shown in fig. 6 and 7, the diameter of the through hole 242 is smaller than the diameter of the cap 331 on the pin 33, so that the pin 33 is prevented from being separated from the through hole 242.

In the above embodiment, referring to fig. 8, the mounting seat 24 has the L-shaped hook grooves 2411 on one side of the mounting seat 24 and located at the upper and lower positions of the mounting groove 241, two L-shaped hook plates 311 are fixed on one side of the spring seat 31 at intervals, the two L-shaped hook plates 311 are hooked with the two L-shaped hook grooves 2411 respectively, and the L-shaped hook plates 311 are correspondingly hooked through the hook grooves 2411 and the L-shaped hook plates 311, so that when the connection between the spring seat and the mounting seat meets the detachable function, the spring seat is not easy to fall off from the mounting seat, and the limit effect of the spring seat on the spring is ensured.

In the above embodiment, the hooks 243 are disposed on one side of the mounting base 24 at the edges of the notches of the two L-shaped hook grooves 2411, the spring seat 31 is provided with two clamping holes 312, and the two hooks 243 are respectively clamped with the hole edges of the two clamping holes 312. Through the multiple fixed mode of the hook joint and the joint on the spring seat 31 and the mounting seat 24, the requirements of the spring seat 31 and the fixed spring 32 and the pin 33 can be met, and the stability of the fixed connection between the spring seat 31 and the mounting seat 24 is ensured, so that the spring seat 31 is not easy to separate from the mounting seat 24 under the normal use condition, and the stability of the internal component of the shell 1 is improved.

In the above embodiment, as shown in fig. 9, the push button 23 has a push surface with a first rough structure 231 (a stripe structure, a bump structure, etc.) on the outer side surface, and the surface of the push button 23 is provided with a direction indication arrow 232. The pushing surface increases the friction force of a user when the pushing button 23 is pressed, the two sides of the pushing button 23 are respectively provided with a limit bulge higher than the middle pushing button surface, when a finger contacts the pushing button 23, the finger can be blocked by the limit bulges at the two ends, the finger can not slide out of the pushing button when slipping on the pushing surface, pushing force and withdrawing force can be more conveniently applied on the pushing button, the pushing button 23 can be easily pushed, and the limit bulges at the two ends of the pushing button 23 are provided with direction indication arrows 231, so that the pushing direction of the pushing button can be directly and quickly known through the indication arrows 231, and the pushing and withdrawing operations of the pushing knife can be conveniently and quickly realized.

In the above-described embodiment, as shown in fig. 10, the outer side surface of the blade detaching button 53 is provided with the pressing surface of the second roughness structure 532 (a stripe structure, a bump structure, or the like may be employed). The pressing surface formed in this way contacts with the finger, so that the friction force of the contact surface is increased, and the finger is not easy to slip from the pressing surface.

In the above embodiment, the top end of the housing 1 is provided with the inwardly recessed finger action surface 14 at the front end of the push button slide 12; the bottom end of the shell 1 is provided with an inward concave hand-held contact surface 15. The two areas are just provided with the contact positions of the big fingers and the palm used by a user to hold the utility knife when the utility knife is used, so that the utility knife meets the holding state of the utility knife in actual use, and is more comfortable, easy and labor-saving when in use. And a third rough structure (such as a stripe structure, a bump structure, etc.) for increasing friction force can be further arranged on the finger action surface 14 and the hand holding contact surface 15, so that the utility knife is not easy to slide down in the hand during the use process.

In other embodiments of the present utility model, referring to fig. 11, the housing 1 is divided into a left housing 16 and a right housing 17, and the two housings can be fastened together by a positioning pin 19 and a positioning pin hole 20 on the two housings to achieve quick fastening, and in order to improve the fastening stability of the two housings, the two housings can be fastened together by a screw 18 at the tail of the housing for the second time. In this way, the left shell 16 and the right shell 17 can be conveniently separated when internal faults occur, and the fault detection and maintenance can be carried out on the interior of the utility knife; the front ends of the left shell and the right shell are respectively provided with a groove, the knife outlet 11 on the shell can be naturally formed after the grooves are spliced, and the width of the knife outlet 11 spliced by the grooves is just slightly larger than that of the knife blade 4, so that the knife blade 4 can be ensured to normally pass through, and the knife blade 4 can not shake when the utility knife is used, and the use stability of the utility knife is ensured.

In the above embodiment, the surface of the left housing 16 may be provided with a schematic view of an art knife, in which the schematic view knife head is arranged towards the outlet edge, and the knife tail is arranged towards the rear side of the housing, so that the user can learn the shape body in which the inner blade 4 is actually placed without pushing out the blade 4, and give an operation prompt to the user when replacing the blade 4, and the tail end of the blade is used as the insertion end to be inserted into the housing, which is convenient for use.

The material of the novel shell 1 can be plastic, metal or alloy, generally speaking, under the condition that the shell 1 is equal in size, the shell made of plastic is lighter, the shell made of metal or alloy is relatively heavier, the shell made of plastic is preferred in the embodiment, and the contact surface with the anti-skid design is adopted, so that a user feels comfortable to hold and feel easy and labor-saving when using the novel shell.

Preferably, the blade 4 of the utility knife is made of high-quality stainless steel, and is free from deformation or fracture even with a large cutting force, and has the advantage of high durability.

The utility model provides an art designing knife convenient for replacing a blade, which is characterized in that:

in the idle state, the push button on the blade pushing assembly is arranged at the tail end of the shell, and the blade is completely placed inside the shell; when the cutter is used, the blade slides towards the front end of the shell in the shell by pushing the push button forwards, so that the blade extends out of the shell from the outlet edge of the front end of the shell, and according to the use condition, a user can automatically adjust the push distance of the push button to adjust the extending length of the blade; when changing the blade, need stretch out the blade to the casing front end, push away the button and promote to push away button slide front end promptly until unable when promoting, the blade is in the biggest state of stretching out, the cylinder of the pin on the elastic pin subassembly just with the protruding butt of pressing of blade dismantlement button below this moment, the user can dismantle the button through pressing the blade, push into the through-hole with the cylinder, make the cylinder not in pegging graft with the grafting pinhole, the spring shrink this moment can take out the blade. When the blade needs to be installed, the new blade takes one end of the plugging pin hole as an entering end, at the moment, the blade guide part guides the blade, so that the blade is attached to the other side of the installation seat, the blade is continuously pushed inwards until the blade tail is abutted on a stop boss (shown in fig. 7 but not shown) on the side of the installation seat, the blade disassembly button is loosened, the pressing protrusion is not contacted with the cylinder, and at the moment, the spring pushes the cylinder to be plugged into the plugging pin hole again, so that the fixing of the blade is completed. The outer side end face of the cylinder body can be rounded, so that the cylinder body can slide into a pin hole of the plug-in pin hole conveniently when the blade is inserted.

Therefore, the utility knife has the advantages of guiding the direction of blade insertion and completing the replacement of the blade without opening the shell.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An art designer's sword convenient to change blade, its characterized in that:

the device comprises a shell (1), wherein one side end of the shell (1) is provided with a knife outlet (11), and the top end of the shell (1) is provided with a push button slideway (12);

the blade pushing assembly (2) is arranged on the shell (1) in a sliding manner, and a push button (23) penetrating through the push button slideway (12) and sliding along the length direction of the push button slideway is arranged at the top of the blade pushing assembly (2);

an elastic pin assembly (3), the elastic pin assembly (3) being arranged on the blade pushing assembly (2);

the blade (4) is arranged in the shell (1), the blade head end of the blade (4) can extend out of the blade outlet (11), and the tail end of the blade (4) is provided with a plug pin hole (41) matched with the elastic pin assembly (3) so as to detachably connect the blade (4) to the blade pushing assembly (2);

pressing elastic plate (5), pressing elastic plate (5) one end is fixed on one side inner shell wall of casing (1), pressing elastic plate (5)'s the other end has blade deflector (51), pressing elastic plate (5) are close to be equipped with respectively on the both sides face of the position of blade deflector (51) and pressing protruding (52) and blade dismantlement button (53), pressing protruding (52) can with elastic pin subassembly (3) butt, blade dismantlement button (53) pass the shell wall of casing (1) is arranged.

2. The utility knife convenient for blade replacement according to claim 1, wherein the blade guide plate (51) comprises a connecting section (511) and a bending guide section (512), one side of the connecting section (511) is fixedly connected with the other end of the pressing elastic plate (5), the other side of the connecting section (511) is fixedly connected with one side of the bending guide section (512), and the concave part of the bending guide section (512) is a blade guide part (5121).

3. The utility knife convenient for blade replacement according to claim 2, wherein an avoidance hole (513) is formed at the connection position of the connection section (511) and the pressing elastic plate (5), a pressing stroke limit block (13) is arranged at one side position of the blade disassembly button (53) on the shell (1), the pressing stroke limit block (13) penetrates through the avoidance hole (513), an abutting surface (531) is arranged on the blade disassembly button (53), a stop surface (131) is arranged on the pressing stroke limit block (13), and the abutting surface (531) can be abutted with the stop surface (131).

4. A utility knife convenient for blade replacement according to any one of claims 1-3, characterized in that the blade pushing assembly (2) comprises a pushing base (21), the pushing base (21) is arranged inside the shell (1), a sliding block (22) which is slidably connected with the push button slideway (12) is arranged at the top end of the pushing base (21), and the push button (23) is fixed at the top end of the sliding block (22);

the mounting seat (24), the mounting seat (24) with one side fixed connection of promotion base (21), elasticity round pin subassembly (3) detachable connection is in on the mounting seat (24).

5. The utility knife convenient for replacing the blade according to claim 4, wherein a mounting groove (241) is formed on a side surface of the mounting seat (24), a through hole (242) is formed on a groove bottom of the mounting groove (241), and the elastic pin assembly (3) comprises:

the spring seat (31) is detachably connected with one side of the mounting seat (24), and the spring seat (31) can seal the notch of the mounting groove (241);

the spring (32) is arranged in the mounting groove (241), and one end of the spring (32) is abutted against one side surface of the spring seat (31);

the pin (33), pin (33) are arranged in mounting groove (241), the other end of spring (32) with the cap body (331) butt of pin (33), cylinder (332) of pin (33) can stretch out through-hole (242) with grafting pinhole (41) grafting, cylinder (332) keep away from the tip of cap body (331) can with press protruding (52) contact.

6. The utility model provides a craft knife convenient to change blade of claim 5, wherein, L shape hook groove (2411) has all been seted up to be located on the side of mount pad (24) in the upper and lower position of mounting groove (241), be fixed with two L shape hook plate (311) on the spring holder (31) side interval, two L shape hook plate (311) respectively with two L shape hook groove (2411) hook joint.

7. The utility model provides a craft knife convenient to change blade of claim 6, wherein, be provided with pothook (243) on mount pad (24) a side and be located two notch border position department of L shape hook groove (2411), two draw-in holes (312) have been seted up on spring holder (31), two pothook (243) respectively with the hole edge joint of two draw-in holes (312).

8. A utility knife for facilitating blade replacement according to any of claims 1-3, 5-7, characterized in that the push button (23) has a push surface with a first roughness (231) on its outer side, which push surface is provided with direction indication arrows (232) for indicating the direction of pushing and retracting, respectively.

9. A utility knife for facilitating blade replacement according to any of claims 1-3, 5-7, characterized in that the outer side of the blade removing button (53) is a pressing surface with a second roughness (532).

10. A utility knife for facilitating blade replacement according to any one of claims 1-3 and 5-7, characterized in that the top end of the housing (1) is provided with an inwardly concave finger-action surface (14) at the front end of the push button slide (12);

the bottom end of the shell (1) is provided with a hand-held contact surface (15) which is concave inwards corresponding to the push button slideway (12).