Art knife

Abstract

The utility model relates to the field of tools, and discloses an art knife which comprises a concave block, a pushing block is arranged in the middle of the interior of the concave block, a wear-resisting disc is rotationally connected to the front side of the top of the pushing block, the rear side of the wear-resisting disc penetrates through the pushing block and is fixedly connected with a gear, and a U-shaped plate is arranged on the left side of the wear-resisting disc. And a cutting knife is arranged at the bottom of the U-shaped plate, a rack is fixedly connected to the top of the U-shaped plate, the rack is connected with the gear in a meshed mode, a limiting protruding block is fixedly connected to the rear side of the left portion of the pushing block, and a limiting hole is formed in the front side of the cutting knife. According to the cutting device, the push block moves leftwards, the U-shaped plate and the cutting knife extend out, when the cutting knife extends out for a long time, the U-shaped plate limits bending of the cutting knife, the abrasion-resistant disc is rotated, the gear is driven to rotate, the gear is meshed with the rack, the U-shaped plate shrinks, the cutting knife extends out again after being shortened, and damage caused by bending of a blade in the cutting process can be prevented.

Description

Technical Field

[0001] The utility model relates to the field of tools, in particular to a utility knife. Background Art

[0002] A utility knife, also known as a craft knife, is a common hand tool that is widely used for cutting paper, cardboard, plastic, and thin wood materials. Its blade is made of solid stainless steel to ensure that the blade is sharp and durable. The utility knife is designed to be retractable, and users can adjust the length of the blade through a simple push-pull mechanism to suit different cutting needs.

[0003] After searching, the Chinese patent publication number is: CN205799593U, which discloses a multifunctional utility knife, including a shell and a blade. A travel device and a digital display device are also provided at one end of the shell. The travel device includes a sliding bar I and a roller I, and the roller I is fixed in the groove at the lower end of the shell; a ruler, a sliding bar II and a roller II are also provided in the shell, and the rollers I and II are coaxially arranged to drive the blade and the ruler to move towards or against each other at the same time; the digital display device includes a displacement sensor, a microprocessor, a solar panel and a display screen on the surface of the shell, and the displacement sensor is connected to the input end of the microprocessor. The displacement data of the blade is then transmitted to the microprocessor, and the output end of the microprocessor is connected to the display screen to display the distance moved by the blade on the display screen; a stop hole is also provided on the roller I; the utility knife described in this utility model has a simple structure by arranging a traveling device and a digital display device, and the blade length can be displayed clearly and intuitively, is energy-saving, easy to use, non-slip, and multifunctional, thereby increasing work efficiency. However, in actual use, when the blade is extended very long and is used to cut an object, the blade will bend due to uneven force, which may cause the blade to break, causing injury to the operator. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a utility knife, which aims to improve the problem in the prior art that when the blade is extended very long and used to cut objects, the blade will bend due to uneven force, thereby causing the blade to break.

[0005] The cam is provided with a toothed plate on the left side of the U-shaped plate, and a toothed plate is provided on the bottom side of the U-shaped plate, and a toothed plate is provided on the bottom side of the U-shaped plate. The toothed plate is meshed with the gear, and a limiting protrusion is fixedly connected to the left rear side of the pushing block. A limiting hole is provided on the front side of the cutting knife, and the limiting hole is engaged with the limiting protrusion. A fastening pulling block is provided on the right side of the pushing block, and the upper and lower sides of the rear of the fastening pulling block are rotatably connected to a rotating bar, and the outer side of the rotating bar is rotatably connected to an extruding block, the outer wall of the extruding block passes through the pushing block, and the outer wall of the fastening pulling block passes through the pushing block. A limiting cover plate is provided on the right side of the outer wall of the concave block, and a cutting circular mechanism is provided on the rear side of the outer wall of the concave block.

[0006] Through the above technical solution: the pushing block is pushed on the left side, thereby driving the U-shaped plate and the cutting knife to extend outward for use. When the cutting knife is extended to a long length, the cutting knife will not bend due to uneven force when cutting objects under the restriction of the U-shaped plate. When the cutting knife is damaged during use, after the damaged blade on its front side is removed, the gear can be driven to rotate by rotating the wear-resistant disc, and the gear is engaged with the rack, thereby driving the U-shaped plate to retract inward, so that the shortened cutting knife is re-extended for the next use.

[0007] As a further description of the above technical solution:

[0008] The circular cutting mechanism includes a rotating block, which is rotatably connected to the right side of the rear part of the concave block. A fixed column is fixedly connected to the left side of the rotating block. A telescopic column is provided on the left side of the inner wall of the fixed column. A rotating hollow column is rotatably connected to the left side of the outer wall of the fixed column. A threaded groove is provided on the outer wall of the telescopic column. The rotating hollow column is threadedly connected to the threaded groove. A supporting column is fixedly connected to the left side of the telescopic column. The fixed column passes through the rotating block and is fixedly connected to the cylinder.

[0009] Through the above technical solution: pulling apart the fixed column can make the rotating block rotate on the concave block, thereby opening a certain angle, and by rotating the rotating hollow column under the action of the threaded groove, the telescopic column moves outward, and then the support column is used on the circular material to be cut, with the support column as the support point, and the cylinder is rotated to cut a circle above the material.

[0010] As a further description of the above technical solution:

[0011] A sliding groove is provided on the rear side of the inner wall of the concave block, and the sliding groove is slidably connected to the pushing block.

[0012] Through the above technical solution: the sliding groove can make the pushing block move better and limit the direction of its movement.

[0013] As a further description of the above technical solution:

[0014] The bottom of the outer wall of the limiting cover plate is fixedly connected with a clamping plate, and the top of the clamping plate is fixedly connected with a semicircular block.

[0015] Through the above technical solution, the utility knife can be conveniently hooked through the clamping plate and the semicircular block.

[0016] As a further description of the above technical solution:

[0017] The left side of the inner wall of the limit cover is fixedly connected to the limit baffle, and the outer wall of the limit cover is fixedly connected to a plurality of anti-slip rings.

[0018] Through the above technical solution: the limiting cover plate can be more firmly engaged with the inner wall of the concave block through the limiting baffle and the anti-slip ring.

[0019] As a further description of the above technical solution:

[0020] A plurality of anti-sliding blocks are fixedly connected to the front side of the pushing block, and a fixed ring is fixedly connected to the right side of the outer wall of the limiting cover plate.

[0021] Through the above technical solution: the anti-slipping ability of the pushing block can be improved by the anti-slip block, and the utility knife can be hung by the fixing ring.

[0022] As a further description of the above technical solution:

[0023] The left side of the inner wall of the concave block is fixedly connected to a limited U-shaped block, and a plurality of anti-slip grooves are opened on the outer side of the cylinder.

[0024] Through the above technical solution: the telescopic position of the cutting knife can be limited by the limiting U-shaped block, and the friction force of the cylinder can be improved by the anti-slip groove.

[0025] As a further description of the above technical solution:

[0026] A hook is fixedly connected to the left side of the rear portion of the outer wall of the concave block, and the hook is engaged with the fixed column. A slot is provided on the rear side of the top of the pushing block, and the slot is engaged with the U-shaped plate.

[0027] Through the above technical solution: the fixing column can be hung and fixed by the hook, and the U-shaped plates can be engaged by the slot.

[0028] The utility model has the following beneficial effects:

[0029] 1. In the utility model, the U-shaped plate and the cutting knife are extended by pushing the block to the left. When the cutting knife is extended too long, the U-shaped plate limits its bending. If the cutting knife is damaged, the damaged blade is removed and the wear-resistant disc is rotated to drive the gear to rotate. The gear engages with the rack to shrink the U-shaped plate. The cutting knife is shortened and then extended again, which can prevent the blade from bending during cutting and causing damage.

[0030] 2. In the utility model, the rotating block can rotate and open the angle on the concave block by pulling the fixed column, and the rotating hollow column pushes the telescopic column to move outward through the threaded groove. The supporting column is used as a support point, and the rotating cylinder cuts a circle on the material, which can cut out a standard circle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A three-dimensional diagram of a utility knife proposed in the present utility model;

[0032] Figure 2 This is a top view of a utility knife proposed by the utility model;

[0033] Figure 3 This is a disassembled diagram of a utility knife proposed in the utility model;

[0034] Figure 4 This is a disassembled view of the rear side of the concave block of a utility knife proposed in the present invention;

[0035] Figure 5 This is a disassembled diagram of the circular cutting mechanism of a utility knife proposed in the utility model.

[0036] Legend:

[0037] 1. Concave block; 2. Cutting circular mechanism; 201. Rotating block; 202. Fixed column; 203. Telescopic column; 204. Threaded groove; 205. Rotating hollow column; 206. Support column; 207. Cylinder; 3. Pushing block; 4. Wear-resistant disc; 5. Gear; 6. U-shaped plate; 7. Rack; 8. Cutting knife; 9. Limiting protrusion; 10. Limiting hole; 11. Fastening pull block; 12. Extrusion block; 13. Rotating bar; 14. Limiting cover plate; 15. Slide groove; 16. Clamp; 17. Semicircular block; 18. Limiting baffle; 19. Anti-slip ring; 20. Anti-slip block; 21. Fixed ring; 22. Limiting U-shaped block; 23. Anti-slip groove; 24. Hook; 25. Slot. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Reference Figure 1 、 Figure 3 and Figure 4 The utility model provides an embodiment: a utility knife, including a concave block 1, a pushing block 3 is provided in the middle of the inner part of the concave block 1, the top front side of the pushing block 3 is rotatably connected to the wear-resistant disc 4, the rear side of the wear-resistant disc 4 passes through the pushing block 3 and is fixedly connected to a gear 5, a U-shaped plate 6 is provided on the left side of the wear-resistant disc 4, and a cutting knife 8 is provided at the bottom of the U-shaped plate 6. Pushing the pushing block 3 to the left drives the U-shaped plate 6 and the cutting knife 8 to extend outward for use; a rack 7 is fixedly connected to the top of the U-shaped plate 6, and the rack 7 is meshed with the gear 5. Rotating the wear-resistant disc 4 can drive the rotation of the gear 5, which is meshed with the gear 5. The U-shaped plate 6 is connected to the inside, thereby driving the U-shaped plate 6 to retract, so that the shortened cutting knife 8 is extended again; the left rear side of the pushing block 3 is fixedly connected to the limiting protrusion 9, and the front side of the cutting knife 8 is provided with a limiting hole 10, which is engaged with the limiting protrusion 9. A fastening pull block 11 is provided on the right side of the pushing block 3. The upper and lower sides of the rear of the fastening pull block 11 are rotatably connected to a rotating bar 13. The outer side of the rotating bar 13 is rotatably connected to an extrusion block 12. The outer wall of the extrusion block 12 passes through the pushing block 3, and the outer wall of the fastening pull block 11 passes through the pushing block 3. A limiting cover plate 14 is provided on the right side of the outer wall of the concave block 1, and a cutting circular mechanism 2 is provided on the rear side of the outer wall of the concave block 1.

[0040] Specifically, when using the utility knife, the pushing block 3 is pushed to the left, thereby driving the U-shaped plate 6 and the cutting blade 8 to extend outward for use. When the cutting blade 8 is extended to a long length, the cutting blade 8 will not bend due to uneven force when cutting objects under the restriction of the U-shaped plate 6. When the cutting blade 8 is damaged during use, after the damaged blade on its front side is removed, the gear 5 can be driven to rotate by rotating the wear-resistant disc 4. The gear 5 is meshed with the rack 7, thereby driving the U-shaped plate 6 to retract inward, so that the shortened cutting blade 8 is re-extended for the next use.

[0041] Reference Figure 1 、 Figure 3 and Figure 5The circular cutting mechanism 2 includes a rotating block 201, which is rotatably connected to the right rear part of the concave block 1. A fixed column 202 is fixedly connected to the left side of the rotating block 201. Pulling out the fixed column 202 can make the rotating block 201 rotate on the concave block 1, thereby opening a certain angle; a telescopic column 203 is provided on the left side of the inner wall of the fixed column 202, and a rotating hollow column 205 is rotatably connected to the left side of the outer wall of the fixed column 202. A threaded groove 204 is provided on the outer wall of the telescopic column 203, and the rotating hollow column 205 is threadedly connected to the threaded groove 204. When the rotating hollow column 205 is rotated, the telescopic column 203 moves outward under the action of the threaded groove 204; a supporting column 206 is fixedly connected to the left side of the telescopic column 203, and the fixed column 202 passes through the rotating block 201 and is fixedly connected to the cylinder 207;

[0042] Specifically, by pulling open the fixed column 202, the rotating block 201 can be rotated on the concave block 1, thereby opening a certain angle. By rotating the rotating hollow column 205, under the action of the threaded groove 204, the telescopic column 203 moves outward, and then the support column 206 is used to support the circular material to be cut, and the cylinder 207 is rotated with the support column 206 as the support point, so as to cut a circle above the material.

[0043] Reference Figure 1 、 Figure 3 and Figure 4 , a slide groove 15 is opened on the rear side of the inner wall of the concave block 1, and the slide groove 15 is slidably connected to the push block 3; the bottom of the outer wall of the limit cover plate 14 is fixedly connected to a splint 16, and the top of the splint 16 is fixedly connected to a semicircular block 17; the left side of the inner wall of the limit cover plate 14 is fixedly connected to a limit baffle 18, and the outer wall of the limit cover plate 14 is fixedly connected to a plurality of anti-slip rings 19;

[0044] Specifically, the slide groove 15 can make the push block 3 move better and limit its moving direction. The splint 16 and the semicircular block 17 can facilitate the hanging of the utility knife. The limit baffle 18 and the anti-slip ring 19 can make the limit cover plate 14 more firmly engaged on the inner wall of the concave block 1.

[0045] Reference Figure 1 、 Figure 2 and Figure 3 , the front side of the pushing block 3 is fixedly connected with multiple anti-sliding blocks 20, and the right side of the outer wall of the limiting cover plate 14 is fixedly connected to a fixed ring 21; the left side of the inner wall of the concave block 1 is fixedly connected to a limited U-shaped block 22, and a plurality of anti-slip grooves 23 are opened on the outer side of the cylinder 207; the left side of the rear outer wall of the concave block 1 is fixedly connected with a hook 24, which is engaged with the fixed column 202, and a slot 25 is opened on the top rear side of the pushing block 3, which is engaged with the U-shaped plate 6;

[0046] Specifically, the anti-slip ability of the pushing block 3 can be improved by the anti-slip block 20, the utility knife can be hung by the fixed ring 21, the telescopic position of the cutting knife 8 can be limited by the limiting U-shaped block 22, the friction force of the cylinder 207 can be increased by the anti-slip groove 23, the fixing column 202 can be hung and fixed by the hook 24, and the U-shaped plate 6 can be engaged by the card slot 25.

[0047] Working principle: Before using the device, first, by pushing the push block 3 to the left, the U-shaped plate 6 and the cutting knife 8 can be driven to extend outward to facilitate cutting of the material. When the cutting knife 8 is extended to a large length, under the constraint of the U-shaped plate 6, the cutting knife 8 will not bend due to uneven force when cutting the object. When the cutting knife 8 is damaged during use, the front blade is removed, and then the wear-resistant disc 4 is rotated to drive the gear 5 to rotate. The meshing transmission of the gear 5 and the rack 7 will cause the U-shaped plate 6 to retract inward, thereby The shortened cutting knife 8 can be re-extended for subsequent use, and through the circular cutting mechanism 2, by pulling the fixed column 202, the rotating block 201 rotates on the concave block 1, thereby achieving a certain angle of opening. Then, by rotating the hollow column 205, the spiral action of the thread groove 204 is utilized to prompt the telescopic column 203 to move outward. Subsequently, the support column 206 is placed on the circular material to be cut, and the support column 206 is used as the center point of rotation. The cylinder 207 is rotated to cut the required circle on the surface of the material.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A utility knife comprising a concave block (1), characterized in that: A pushing block (3) is provided in the middle of the inner portion of the concave block (1), and a wear-resistant disc (4) is rotatably connected to the front side of the top of the pushing block (3), and the rear side of the wear-resistant disc (4) passes through the pushing block (3) and is fixedly connected to a gear (5). A U-shaped plate (6) is provided on the left side of the wear-resistant disc (4), and a cutting knife (8) is provided on the bottom of the U-shaped plate (6). A rack (7) is fixedly connected to the top of the U-shaped plate (6), and the rack (7) is meshed with the gear (5). A limited protrusion (9) is fixedly connected to the rear side of the left portion of the pushing block (3), and a front side of the cutting knife (8) is provided. A limiting hole (10) is provided, the limiting hole (10) is engaged with the limiting protrusion (9), a fastening pull block (11) is provided on the right side of the pushing block (3), the upper and lower sides of the rear of the fastening pull block (11) are rotatably connected to a rotating bar (13), the outer side of the rotating bar (13) is rotatably connected to an extrusion block (12), the outer wall of the extrusion block (12) passes through the pushing block (3), the outer wall of the fastening pull block (11) passes through the pushing block (3), a limiting cover plate (14) is provided on the right side of the outer wall of the concave block (1), and a cutting circular mechanism (2) is provided on the rear side of the outer wall of the concave block (1).

2. The utility knife according to claim 1, characterized in that: The circular cutting mechanism (2) comprises a rotating block (201), wherein the rotating block (201) is rotatably connected to the right side of the rear portion of the concave block (1), a fixed column (202) is fixedly connected to the left side of the rotating block (201), a telescopic column (203) is provided on the left side of the inner wall of the fixed column (202), a rotating hollow column (205) is rotatably connected to the left side of the outer wall of the fixed column (202), a thread groove (204) is provided on the outer wall of the telescopic column (203), the rotating hollow column (205) is threadedly connected to the thread groove (204), a supporting column (206) is fixedly connected to the left side of the telescopic column (203), and the fixed column (202) passes through the rotating block (201) and is fixedly connected to the cylinder (207).

3. The utility knife according to claim 1, characterized in that: A sliding groove (15) is provided on the rear side of the inner wall of the concave block (1), and the sliding groove (15) is slidably connected to the pushing block (3).

4. The utility knife according to claim 1, characterized in that: A clamping plate (16) is fixedly connected to the bottom of the outer wall of the limiting cover plate (14), and a semicircular block (17) is fixedly connected to the top of the clamping plate (16).

5. The utility knife according to claim 1, characterized in that: The left side of the inner wall of the limiting cover plate (14) is fixedly connected to a limiting baffle (18), and the outer wall of the limiting cover plate (14) is fixedly connected to a plurality of anti-slip rings (19).

6. The utility knife according to claim 1, characterized in that: A plurality of anti-sliding blocks (20) are fixedly connected to the front side of the pushing block (3), and a fixed ring (21) is fixedly connected to the right side of the outer wall of the limiting cover plate (14).

7. The utility knife according to claim 2, characterized in that: A limited U-shaped block (22) is fixedly connected to the left side of the inner wall of the concave block (1), and a plurality of anti-slip grooves (23) are provided on the outer side of the cylinder (207).

8. The utility knife according to claim 2, characterized in that: A hook (24) is fixedly connected to the left side of the rear portion of the outer wall of the concave block (1), and the hook (24) is engaged with the fixed column (202). A slot (25) is provided on the rear side of the top of the pushing block (3), and the slot (25) is engaged with the U-shaped plate (6).

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