Art knife capable of preventing blade from being accidentally pushed out
By improving the structural design of the utility knife, using the combination of components such as grip, bottom cover, push block, etc., the limit fixation of the push block is achieved, solving the safety hazards of unexpectedly rolling out the blade and improving the safety of use.
Patent Information
- Application Number
- CN202422197637.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The existing utility knife cannot be effectively limited when the blade is retracted, resulting in unexpected push of the blade, which poses a safety hazard.
By designing a combined structure of grip, bottom cover, push block, press frame, extrusion block, guide rod, limit block and spring, the limit fixation of the push block is achieved to ensure that the blade is not unexpectedly pushed out after being retracted.
It effectively avoids accidental rollout of the blade, improves the safety of use, and prevents injuries to people.
Smart Images
Figure CN223057785U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of stationery, in particular to a utility knife for preventing the blade from being accidentally pushed out. Background Technique
[0002] A utility knife is a multifunctional manual cutting tool widely used in various occasions such as various handicrafts, artistic creations, offices, and families. A utility knife usually consists of a handle and a replaceable blade, and has the characteristics of being light and easy to carry.
[0003] For the existing utility knife, the blade is usually moved by pushing a push block, and then the limit block on the push block is pulled out to limit the push block through the limit block, so that the push block is fixed on the handle. Since the limit block is usually pulled towards the bottom cover part on the handle when fixing the push block, when the blade is retracted to the area near the bottom cover, the push block cannot be limited and fixed, which may cause the blade to be accidentally pushed out, easily causing harm to people, and is rather inconvenient.
[0004] Therefore, it is necessary to design a utility knife for preventing the blade from being accidentally pushed out, which can limit and fix the push block after the blade is retracted, avoid the blade being accidentally pushed out and causing harm to people, and improve the safety of use. Content of the Utility Model
[0005] In order to overcome the shortcomings of the existing utility knife that when fixing the push block, the limit block is usually pulled towards the bottom cover part on the handle, when the blade is retracted to the area near the bottom cover, the push block cannot be limited and fixed, which may cause the blade to be accidentally pushed out, easily causing harm to people, and is rather inconvenient, the utility model provides a utility knife for preventing the blade from being accidentally pushed out, which can limit and fix the push block after the blade is retracted, avoid the blade being accidentally pushed out and causing harm to people, and improve the safety of use.
[0006] The technical solution is: a utility knife for preventing the blade from being accidentally pushed out, including a grip, a bottom cover, a docking member, a push block, a blade, a pressing frame, an extrusion block, a guide rod, a first telescopic spring, a guide frame, a first limiting block, and a second telescopic spring. The bottom cover is clamped on the right side of the grip, the docking member is connected to the inner side of the front part of the grip, the push block is slidably connected to the right part of the grip, the blade is clamped on the left part of the push block, the pressing frame is slidably connected to the left part of the push block, the guide rod is connected to the inside of the push block, the extrusion block is slidably connected to the guide rod, the extrusion block is in clamping cooperation with the pressing frame, a first telescopic spring is connected between the extrusion block and the push block, the guide frame is connected to the inner side of the right part of the push block, the first limiting blocks are slidably connected to the upper and lower parts of the guide frame, the first limiting blocks are in clamping cooperation with the docking member, the first limiting blocks are in contact with the extrusion block, and the second telescopic springs are connected between the first limiting blocks and the guide frame.
[0007] As an improvement of the above solution, a card slot is opened in the right part of the blade.
[0008] As an improvement of the above solution, a limiting ring is provided at the rear of the pressing frame.
[0009] As an improvement of the above solution, the middle part of the extrusion block is a bevel.
[0010] As an improvement of the above solution, the outer part of the first limiting block is wedge-shaped.
[0011] As an improvement of the above solution, it further includes a sliding rod, a second limiting block and a third telescopic spring. The middle part of the bottom cover is slidably connected with the sliding rod. The front side of the sliding rod is connected with the second limiting block. The second limiting block is clamped with the pushing block. A third telescopic spring is connected between the sliding rod and the bottom cover.
[0012] Compared with the prior art, the utility model has the following advantages: the second limiting block of the utility model is clamped with the pushing block, and then the pressing frame is moved backward, so that the extrusion block moves to the right, and the first telescopic spring is stretched, so that the extrusion block contacts with the first limiting block, limits the first limiting block, and fixes the pushing block, achieving the effect of being able to limit and fix the pushing block after the blade is retracted, avoiding accidental ejection of the blade and causing harm to personnel, and improving the safety of use. Description of the Drawings
[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.
[0014] Figure 2 It is a three-dimensional structural schematic diagram of the utility model's utility knife.
[0015] Figure 3 It is a first sectional three-dimensional structural schematic diagram of the limiting mechanism of the utility model.
[0016] Figure 4 It is a second partial three-dimensional structural schematic diagram of the limiting mechanism of the utility model.
[0017] Figure 5 It is a three-dimensional structural schematic diagram of the protection mechanism of the utility model.
[0018] Names of the reference numerals in the drawings: 1, grip; 2, bottom cover; 3, docking part; 4, pushing block; 5, blade; 6, pressing frame; 7, extrusion block; 8, guide rod; 9, first telescopic spring; 10, guide frame; 11, first limiting block; 12, second telescopic spring; 13, sliding rod; 14, second limiting block; 15, third telescopic spring. Detailed Embodiment
[0019] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are for illustrating the present application and not for limiting the scope of the present application. The implementation conditions adopted in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually those in conventional experiments.
[0020] A utility knife for preventing the accidental ejection of a blade, as Figures 1 - 5 shown, includes a grip 1, a bottom cover 2, a docking member 3, a push block 4, a blade 5, a pressing frame 6, a pressing block 7, a guide rod 8, a first telescopic spring 9, a guide frame 10, a first limiting block 11, a second telescopic spring 12, a sliding rod 13, a second limiting block 14 and a third telescopic spring 15. The bottom cover 2 is snap-connected to the right side of the grip 1. The docking member 3 is connected to the inner side of the front part of the grip 1. The push block 4 is slidably connected to the right part of the grip 1. The blade 5 is snap-connected to the left part of the push block 4. A card slot is formed in the right part of the blade 5 for easy snap connection. The pressing frame 6 is slidably connected to the left part of the push block 4. A limiting ring is provided at the rear part of the pressing frame 6 for easy limiting. The guide rod 8 is connected to the inside of the push block 4. The pressing block 7 is slidably connected to the guide rod 8. The middle part of the pressing block 7 is a slope for easy pressing. The pressing block 7 is in snap-fit connection with the pressing frame 6. The first telescopic spring 9 is connected between the pressing block 7 and the push block 4. The guide frame 10 is connected to the inner side of the right part of the push block 4. The first limiting blocks 11 are slidably connected to the upper and lower parts of the guide frame 10 respectively. The outer parts of the first limiting blocks 11 are wedge-shaped for easy snap connection. The first limiting blocks 11 are in snap-fit connection with the docking member 3 respectively. The first limiting blocks 11 are in contact with the pressing block 7 respectively. The second telescopic springs 12 are connected between the first limiting blocks 11 and the guide frame 10 respectively. The sliding rod 13 is slidably connected to the middle part of the bottom cover 2. The second limiting block 14 is connected to the front side of the sliding rod 13. The second limiting block 14 is in snap-fit connection with the push block 4. The third telescopic spring 15 is connected between the sliding rod 13 and the bottom cover 2.
[0021] When using this device, first hold the grip 1, then move the push block 4 to the left, driving the blade 5 to move to the left, causing the first limiting block 11 to move outwards on the guide frame 10. After the second telescopic spring 12 contracts and then resumes, when it moves to a certain position, the first limiting block 11 is engaged with the docking part 3. Then move the pressing frame 6 backwards. The middle part of the extrusion block 7 is beveled, so that the extrusion block 7 moves to the right on the guide rod 8, and the first telescopic spring 9 is stretched, making the extrusion block 7 contact the first limiting block 11 to limit the first limiting block 11 and fix the push block 4. When it is necessary to retract the blade 5, the pressing frame 6 can be moved forward and limited by the limiting ring, so that the pressing frame 6 no longer contacts the extrusion block 7. The first telescopic spring 9 resumes, driving the extrusion block 7 to move to the left, so that the extrusion block 7 no longer contacts the first limiting block 11. Then move the push block 4 to the right, driving the first limiting block 11 to move outwards. After the second telescopic spring 12 contracts and then resumes, driving the first limiting block 11 to reset. When it moves until the blade 5 is almost retracted, the push block 4 presses the second limiting block 14, driving the sliding rod 13 to move forward on the bottom cover 2, and the third telescopic spring 15 is compressed and contracts. When the push block 4 continues to move to the right, the third telescopic spring 15 resumes, making the second limiting block 14 engaged with the push block 4. Then move the pressing frame 6 backwards, making the extrusion block 7 move to the right, and the first telescopic spring 9 is stretched, making the extrusion block 7 contact the first limiting block 11 to limit the first limiting block 11 and fix the push block 4. Thus, the push block 4 can be limited and fixed after the blade 5 is retracted, avoiding accidental ejection of the blade 5 and causing harm to personnel, and improving the safety of use.
[0022] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.
Claims
1. A utility knife for preventing accidental blade ejection, characterized in that It includes a grip (1), a bottom cover (2), a docking part (3), a push block (4), a blade (5), a pressing frame (6), a pressing block (7), a guide rod (8), a first telescopic spring (9), a guide frame (10), a first limiting block (11) and a second telescopic spring (12). The bottom cover (2) is clamped to the right side of the grip (1). The docking part (3) is connected to the inner side of the front part of the grip (1). The push block (4) is slidably connected to the right part of the grip (1). The blade (5) is clamped to the left part of the push block (4). The pressing frame (6) is slidably connected to the left part of the push block (4). The guide rod (8) is connected to the inside of the push block (4). The pressing block (7) is slidably connected to the guide rod (8). The pressing block (7) is in clamping cooperation with the pressing frame (6). The first telescopic spring (9) is connected between the pressing block (7) and the push block (4). The guide frame (10) is connected to the inner side of the right part of the push block (4). The first limiting blocks (11) are slidably connected to the upper and lower parts of the guide frame (10). The first limiting blocks (11) are in clamping cooperation with the docking part (3). The first limiting blocks (11) are in contact with the pressing block (7). The second telescopic spring (12) is connected between the first limiting blocks (11) and the guide frame (10).
2. The utility knife for preventing accidental blade ejection according to claim 1, characterized in that, A clamping groove is formed in the right part of the blade (5).
3. The utility knife for preventing accidental blade ejection according to claim 2, wherein A limiting ring is arranged at the rear part of the pressing frame (6).
4. The utility knife for preventing accidental blade ejection according to claim 3, characterized in that, The middle part of the pressing block (7) is a slope surface.
5. The utility knife for preventing accidental blade ejection according to claim 4, wherein, The outer parts of the first limiting blocks (11) are all wedge-shaped.
6. The utility knife for preventing accidental blade ejection according to claim 5, characterized in that, It further includes a sliding rod (13), a second limiting block (14) and a third telescopic spring (15). The sliding rod (13) is slidably connected to the middle part of the bottom cover (2). The second limiting block (14) is connected to the front side of the sliding rod (13). The second limiting block (14) is in clamping connection with the push block (4). The third telescopic spring (15) is connected between the sliding rod (13) and the bottom cover (2).