A safety device for a knife

Abstract

The utility model discloses a safety device for cutter, including insurance push button, tool bit drive part and locking block, insurance push button axially movably arranged in one side of tool shell, and insurance push button is equipped with locking position A and the unlocking position of locking position A front end, and the height of unlocking position is lower than the height of locking position A, and is equipped with elastic element A between insurance push button and tool shell, tool bit drive part axis movably arranged in tool shell, and tool bit drive part is equipped with locking position B and the unlocking portion of locking position B rear end, locking block is elastically retractable and is arranged in tool shell along height direction, and locking block is equipped with first locking portion in insurance push button one side and second locking portion in tool bit drive part one side, when needing to use cutter, need first with insurance push button to the back to remove the locking of locking block to tool bit drive part, can with tool bit drive part to the forward push to drive tool bit to turn out tool shell, and this setting has improved the use security of cutter greatly.

Description

Technical Field

[0001] This utility model relates to a safety device for cutting tools, and more particularly to a safety device for cutting tools. Background Technology

[0002] Knives are mainly divided into cutting knives for side cutting and scrapers for scraping. A cutting knife is an art and craft tool, often with a pull-out design, consisting of a plastic handle and a blade. The cutting edge of the blade is usually parallel to the axis of the handle or housing, and it is primarily used for cutting, such as cutting paper or cardboard. A scraper, on the other hand, typically has a blade perpendicular or orthogonal to the axis of the handle, and is used for scraping, such as scraping paint or glue residue from flat surfaces. Cutting knives and scrapers are two separate hand tools and are often not interchangeable. Users typically need to purchase, store, and carry both separate tools, which can be inconvenient.

[0003] Deformable cutting tools, driven by a drive unit to rotate the tool holder, can switch between multiple positions such as cutting blade, scraper, and even oblique scraper. A single deformable cutting tool can meet various work requirements for cutting and scraping, and multi-angle positioning of the tool can be quickly achieved with just one hand, which helps to improve work efficiency. Therefore, the demand and development of deformable cutting tools are increasing day by day.

[0004] When the existing variable-speed cutting tool pushes the push button forward, the cutting head will directly rotate out of the tool housing through the clearance channel, which poses a certain safety risk. Similarly, when the push button is pushed backward, the cutting head will directly rotate from the outside of the tool housing into the inside of the tool housing. Both of these methods can easily cause safety accidents under misoperation. Therefore, it is necessary to design a safety component for this cutting tool. Summary of the Invention

[0005] The purpose of this invention is to provide a safety device for cutting tools. When the tool needs to be used, the safety push button must first be pushed backward to release the locking block from the tool head drive component before the tool head drive component can be pushed forward to rotate the tool head out of the tool case. This safety device greatly improves the safety of using the tool.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A safety device for a cutting tool includes a safety push button, a cutting head drive component, and a locking block. The safety push button is axially movably disposed on one side of the cutting tool housing. The safety push button has a locking position A and an unlocking position located at the front end of the locking position A. The height of the unlocking position is lower than the height of the locking position A. An elastic element A is disposed between the safety push button and the cutting tool housing, and the elastic element A provides a force for the safety push button to move towards the front end of the cutting tool housing. The cutting head drive component is axially movably disposed within the cutting tool housing. The cutting head drive component has a locking position B and an unlocking part located at the rear end of the locking position B. The locking block is elastically and retractably disposed within the cutting tool housing along the height direction. The fixed block has a first locking part located on one side of the safety push button and a second locking part located on one side of the cutter head drive member. In the initial state, the first locking part is locked in the locking position A and the second locking part is locked in the locking position B. At this time, the cutter head drive member is restricted from pushing forward. When the safety push button is driven to move backward until the first locking part is locked in the unlocking position, the locking block is pressed down by the unlocking position end face to release the second locking part from the locking position B. At this time, the cutter head drive member is allowed to be pushed forward. During the forward movement of the cutter head drive member, the unlocking part will press down on the second locking part to make the locking block move down and release the first locking part from the unlocking position. At this time, the safety push button is reset under the action of the elastic member A.

[0007] Furthermore, the blade housing is provided with a front limiting part and a rear limiting part. When the safety push button moves forward to abut against the front limiting part, the safety push button is restricted from continuing to move forward. When the safety push button moves backward to abut against the rear limiting part, the safety push button is restricted from continuing to move backward.

[0008] Furthermore, the front end of the locking position A and / or the front end of the first locking part are provided with a first guide slope, which is inclined downward from back to front.

[0009] Furthermore, the height of the unlocking part is lower than the height of the unlocking position, so that when the cutter head drive member moves forward to the position corresponding to the second locking part of the unlocking part, the second locking part drives the locking block to move down synchronously under the action of the unlocking part, thereby releasing the lock between the first locking part and the unlocking position.

[0010] Furthermore, the front end of the unlocking part and / or the rear end of the second locking part are provided with a second guide slope.

[0011] Furthermore, the inner wall of the blade housing is provided with a mounting base with an upper opening, and the mounting base has an active space extending along the height direction. The locking block is disposed in the active space, and an elastic element B is provided between the locking block and the inner end face of the mounting base so that the locking block has an upward tendency to move.

[0012] Furthermore, the locking block is provided with a guide protrusion on its front side and / or rear side, and the mounting base is provided with a guide groove for sliding guide engagement of the guide protrusion.

[0013] Furthermore, the blade housing is provided with a first limiting part and a second limiting part extending along the axis, and the first limiting part and the second limiting part are spaced apart so that a moving space is formed between the first limiting part and the second limiting part for the movement of the safety push button axis.

[0014] Furthermore, the cutter head drive is also provided with a locking position C. The locking position C is located on the other side of the unlocking part relative to the locking position B. When the cutter head drive moves forward to the second locking part and locks in the locking position C, the cutter head drive is restricted from retracting. It is necessary to first move the safety push button backward to the first locking part and lock it in the unlocking position. The locking block is pressed down by the end face of the unlocking position to release the second locking part from the locking position C. Only then is the cutter head drive allowed to retract.

[0015] Furthermore, the rear end of the unlocking part and / or the front end of the second locking part are provided with a third guide slope.

[0016] In summary, this utility model has the following beneficial effects: This utility model is a safety device for cutting tools. When the tool needs to be used, the safety push button needs to be pushed backward to release the locking block from the tool head drive component before the tool head drive component can be pushed forward to drive the tool head to rotate out of the tool case. The setting of this safety device greatly improves the safety of using the tool. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the cutting tool of this utility model.

[0018] Figure 2 This is an exploded view of the cutting tool of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal installation structure of the safety device of this utility model.

[0020] Figure 4 This is an internal schematic diagram of the safety device of this utility model.

[0021] Figure 5 This is the utility model Figure 4 Sectional view at point A.

[0022] Figure 6 This is the utility model Figure 4 Sectional view at point B.

[0023] Figure 7 This is a schematic diagram of the cutter head drive component of this utility model.

[0024] Figure 8 This is a schematic diagram of the safety push button of this utility model.

[0025] Figure 9 This is a schematic diagram of the locking block of this utility model.

[0026] In the diagram: 10. Safety push button; 11. Locking position A; 111. First guide slope; 12. Unlocking position; 20. Elastic element A; 30. Cutter head drive component; 31. Locking position B; 32. Unlocking part; 321. Second guide slope; 322. Third guide slope; 33. Locking position C; 40. Locking block; 41. First locking part; 42. Second locking part; 43. Guide protrusion; 50. Cutter shell; 51. Front limit part; 52. Rear limit part; 53. Mounting base; 54. Elastic element B; 55. Guide groove; 56. First limit part; 57. Second limit part. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] For ease of understanding, the terms "upper," "lower," "left," "right," "front," and "rear" used in this utility model are as described in the appendix to the specification. Figure 4 and attached Figure 5 Based on, the instruction manual is attached. Figure 4 and attached Figure 5 The Z-axis direction refers to the height direction in this text, the X-axis direction refers to the axis direction in this text, and the front direction is the auxiliary direction. Figure 4 The ejection direction of the elastic element A20 in the middle is the rear end direction. Figure 4 The compression direction of the elastic element A20 in the middle.

[0031] like Figures 1-9As shown, a safety device for a cutting tool includes a safety push button 10, a cutting head drive component 30, and a locking block 40. The safety push button 10 is axially movably disposed on one side of the cutting tool housing 50. The safety push button 10 has a locking position A11 and an unlocking position 12 located at the front end of the locking position A11. The locking position A11 and the unlocking position 12 are groove structures, which enable them to have a positioning function. The height of the unlocking position 12 is lower than the height of the locking position A11, that is, the depth of the locking position A11 is deeper than the depth of the unlocking position 12. An elastic element A20 is provided between the safety push button 10 and the cutting tool housing 50. The elastic element A20 provides a force for the safety push button 10 to move towards the front end of the cutting tool housing 50.

[0032] The cutting head drive component 30 is movably disposed within the cutting head housing 50. The cutting head drive component 30 is provided with a locking position B31 and an unlocking part 32 located at the rear end of the locking position B31. The cutting head is installed at the front end of the cutting head drive component 30. The cutting head drive component 30 is pushed axially along the cutting head housing 50 by a push button.

[0033] The locking block 40 is elastically and retractably disposed within the blade housing 50 along the height direction. The locking block 40 has a first locking part 41 located on one side of the safety push button 10 and a second locking part 42 located on one side of the blade drive member 30. The first locking part 41 and the second locking part 42 are located on the left and right sides of the locking block 40 respectively and are integrally disposed with the locking block 40.

[0034] In the initial state, the first locking part 41 is locked in the locking position A11 and the second locking part 42 is locked in the locking position B31. At this time, the cutter head drive 30 is restricted from moving forward. In this initial state, when the safety push button 10 is driven to move backward until the first locking part 41 is locked in the unlocking position 12, the locking block 40 is pressed down by the end face of the unlocking position 12 to release the lock between the second locking part 42 and the locking position B31. At this time, the cutter head drive 30 is allowed to be pushed forward. During the forward movement of the cutter head drive 30, the unlocking part 32 will press down on the second locking part 42 to make the locking block 40 move down and release the lock between the first locking part 41 and the unlocking position 12. At this time, the safety push button 10 is reset under the action of the elastic member A20.

[0035] In some embodiments, the blade housing 50 is provided with a front limiting portion 51 and a rear limiting portion 52. When the safety push button 10 moves forward to abut against the front limiting portion 51, the safety push button 10 is restricted from continuing to move forward. When the safety push button 10 moves backward to abut against the rear limiting portion 52, the safety push button 10 is restricted from continuing to move backward. The front limiting portion 51 and the rear limiting portion 52 limit the travel of the safety push button 10 along the axis. Specifically, when the safety push button 10 moves forward to abut against the front limiting portion 51, the first locking portion 41 is locked in the locking position A11, and the safety push button 10 remains at the foremost position. When the safety push button 10 moves backward to abut against the rear limiting portion 52, the first locking portion 41 is locked in the unlocking position 12, and the safety push button 10 remains at the rearmost position.

[0036] In some embodiments, the front end of the locking position A11 and / or the front end of the first locking part 41 are provided with a first guide slope 111. The first guide slope 111 is inclined downward from back to front. That is, at least one of the front ends of the locking position A11 and the front end of the first locking part 41 is provided with a first guide slope 111, so that the safety push button 10 can be pushed backward more smoothly, thereby making it easier for the user to operate the safety push button 10.

[0037] In some embodiments, the height of the unlocking part 32 is lower than the height of the unlocking position 12, so that when the blade drive member 30 moves forward to the position corresponding to the second locking part 42 of the unlocking part 32, the second locking part 42 drives the locking block 40 to move down synchronously under the action of the unlocking part 32, thereby releasing the lock between the first locking part 41 and the unlocking position 12. At this time, the safety push button 10 moves forward to the foremost position under the action of the elastic member A20, and locks with the first locking part 41 and the locking position A11.

[0038] In some embodiments, the front end of the unlocking part 32 and / or the rear end of the second locking part 42 are provided with a second guide slope 321. The second guide slope 321 is inclined upward from back to front. That is, at least one of the front end of the unlocking part 32 and the rear end of the second locking part 42 is provided with a second guide slope 321. The second guide slope 321 is provided so that the cutter head drive member 30 can be pushed forward more smoothly, thereby making it easier and smoother to push the cutter head drive member 30 by the push button.

[0039] In some embodiments, the inner wall of the blade housing 50 is provided with a mounting base 53 with an upper opening. The mounting base 53 has an active space extending in the height direction. The locking block 40 is disposed in the active space. An elastic member B54 is provided between the locking block 40 and the inner end face of the mounting base 53 so that the locking block 40 has an upward tendency. In this utility model, the left and right sides of the mounting base 53 are provided with channels for the first locking part 41 and the second locking part 42 to extend out.

[0040] In some embodiments, the front and / or rear sides of the locking block 40 are provided with guide protrusions 43, and the mounting base 53 is provided with guide grooves 55 for sliding guide engagement of the guide protrusions 43. The engagement of the guide protrusions 43 and the guide grooves 55 serves two purposes: firstly, it limits the locking block 40 along the direction perpendicular to the insertion direction, i.e., along the left-right direction and the axial direction, so that the locking block 40 can only move in the height direction; secondly, it serves a guiding purpose, so that the locking block 40 can extend and retract more smoothly in the height direction.

[0041] In some embodiments, the blade housing 50 is provided with a first limiting portion 56 and a second limiting portion 57 extending along the axis. The first limiting portion 56 and the second limiting portion 57 are spaced apart so that a moving space is formed between the first limiting portion 56 and the second limiting portion 57 for the safety push button 10 to move along its axis. Through this arrangement, not only is the running trajectory of the safety push button 10 limited, that is, the safety push button 10 is limited to moving only in the axial direction, but it also plays a certain guiding role, making the axial movement of the safety push button 10 smoother.

[0042] In some embodiments, the cutter head drive member 30 is further provided with a locking position C33, which is located on the other side of the unlocking part 32 opposite to the locking position B31. When the cutter head drive member 30 moves forward until the second locking part 42 is locked in the locking position C33, the cutter head drive member 30 is restricted from retracting. It is necessary to first activate the safety push button 10 to move backward until the first locking part 41 is locked in the unlocking position 12. The locking block 40 is pressed down by the end face of the unlocking position 12 to release the lock between the second locking part 42 and the locking position C33. At this time, the cutter head drive member 30 is allowed to retract. The purpose of this setting is that when the user wants to retract the cutter head into the cutter housing 50, if the safety push button 10 is not activated first, the user will be unable to retract the cutter head. If the safety push button 10 moves backward, that is, without releasing the second locking part 42 of the locking block 40 from locking position C33, the cutter head drive member 30 is not allowed to move backward, thus preventing the cutter head from being retracted into the cutter housing 50. Therefore, the safety push button 10 needs to be moved backward to the rearmost position, that is, moved backward to the position where the first locking part 41 is locked in the unlocking position 12, so as to release the second locking part 42 of the locking block 40 from locking position C33. Only then can the cutter head drive member 30 be allowed to move backward to drive the cutter head to retract into the cutter housing 50, so that the safety device can also play a safety role when the cutter head needs to be retracted, effectively improving safety performance.

[0043] In some embodiments, the rear end of the unlocking part 32 and / or the front end of the second locking part 42 are provided with a third guide slope 322. The third guide slope 322 is inclined downward from back to front. That is, at least one of the rear end of the unlocking part 32 and the front end of the second locking part 42 is provided with a third guide slope 322. By providing the third guide slope 322, it is easier for the cutter head drive member 30 to move backward, thereby making it easier for the user to drive the cutter head drive member 30.

[0044] In some embodiments, the safety push button 10 and / or the blade housing 50 are provided with a guide portion for guiding the elastic member A20. The guide portion may be a guide post sleeved inside the elastic member or a guide groove for accommodating part of the elastic member A20. By providing the guide portion, the elastic member A20 is prevented from being misaligned.

[0045] In some embodiments, the cutter housing 50 is provided with two axially spaced limiting posts, and the cutter head drive member 30 is provided with an axially arranged strip groove. The limiting posts extend into the strip groove and are guided and limited by the strip groove, so that the cutter head drive member 30 can only move along the axial direction of the cutter housing 50.

[0046] In summary, this utility model has the following beneficial effects: This utility model is a safety device for cutting tools. When the tool needs to be used, the safety push button 10 needs to be pushed backward to release the locking block 40 from the tool head drive member 30 before the tool head drive member 30 can be pushed forward to drive the tool head to rotate out of the tool housing 50. The setting of this safety device greatly improves the safety of using the tool.

[0047] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A safety device for a cutting tool, characterized in that: include A safety push button (10) is axially movable on one side of the blade housing (50). The safety push button (10) has a locking position A (11) and an unlocking position (12) located at the front end of the locking position A (11). The height of the unlocking position (12) is lower than the height of the locking position A (11). An elastic element A (20) is provided between the safety push button (10) and the blade housing (50). The elastic element A (20) provides the force for the safety push button (10) to move toward the front end of the blade housing (50). The cutter head drive (30) is movably disposed within the cutter housing (50) and is provided with a locking position B (31) and an unlocking part (32) located at the rear end of the locking position B (31). Locking block (40) is elastically and retractably disposed in the cutter housing (50) along the height direction. The locking block (40) is provided with a first locking part (41) located on the side of the safety push button (10) and a second locking part (42) located on the side of the cutter head drive member (30). In the initial state, the first locking part (41) is locked in the locking position A (11) and the second locking part (42) is locked in the locking position B (31). At this time, the cutting head drive (30) is restricted from pushing forward. When the safety push button (10) is driven to move backward until the first locking part (41) is locked in the unlocking position (12), the locking block (40) is pressed down by the end face of the unlocking position (12) to release the second locking part (42) from the locking position B (31). At this time, the cutting head drive (30) is allowed to be pushed forward. During the forward movement of the cutting head drive (30), the unlocking part (32) will press down on the second locking part (42) to make the locking block (40) move down and release the first locking part (41) from the unlocking position (12). At this time, the safety push button (10) is reset under the action of the elastic member A (20).

2. A safety device for a cutting tool according to claim 1, characterized in that: The blade housing (50) is provided with a front limiting part (51) and a rear limiting part (52). When the safety push button (10) moves forward to abut against the front limiting part (51), the safety push button (10) is restricted from continuing to move forward. When the safety push button (10) moves backward to abut against the rear limiting part (52), the safety push button (10) is restricted from continuing to move backward.

3. A safety device for a cutting tool according to claim 2, characterized in that: The front end of the locking position A (11) and / or the front end of the first locking part (41) are provided with a first guide slope (111), which is inclined downward from back to front.

4. A safety device for a cutting tool according to claim 1, characterized in that: The height of the unlocking part (32) is lower than the height of the unlocking position (12), so that when the cutter head drive member (30) moves forward to the position of the unlocking part (32) corresponding to the second locking part (42), the second locking part (42) drives the locking block (40) to move down synchronously under the action of the unlocking part (32), thereby releasing the lock between the first locking part (41) and the unlocking position (12).

5. A safety device for a cutting tool according to claim 2, characterized in that: The front end of the unlocking part (32) and / or the rear end of the second locking part (42) are provided with a second guide slope (321).

6. A safety device for a cutting tool according to claim 1, characterized in that: The inner wall of the blade shell (50) is provided with a mounting base (53) with an upper opening. The mounting base (53) has an active space extending in the height direction. The locking block (40) is set in the active space. An elastic member B (54) is provided between the locking block (40) and the inner end face of the mounting base (53) so that the locking block (40) has an upward tendency.

7. A safety device for a cutting tool according to claim 6, characterized in that: The locking block (40) is provided with a guide protrusion (43) on the front and / or rear side, and the mounting base (53) is provided with a guide groove (55) for sliding guide engagement of the guide protrusion (43).

8. A safety device for a cutting tool according to claim 2, characterized in that: The blade housing (50) is provided with a first limiting part (56) and a second limiting part (57) extending along the axis. The first limiting part (56) and the second limiting part (57) are spaced apart so that a moving space is formed between the first limiting part (56) and the second limiting part (57) for the axis of the safety push button (10) to move.

9. A safety device for a cutting tool according to any one of claims 1-8, characterized in that: The cutter head drive (30) is also provided with a locking position C (33). The locking position C (33) is located on the other side of the unlocking part (32) relative to the locking position B (31). When the cutter head drive (30) moves forward to the second locking part (42) and locks in the locking position C (33), the cutter head drive (30) is restricted from retracting. It is necessary to first move the safety push button (10) backward to the first locking part (41) and lock it in the unlocking position (12). The locking block (40) is pressed down by the end face of the unlocking position (12) to release the second locking part (42) from the locking position C (33). Only then is the cutter head drive (30) allowed to retract.

10. A safety device for a cutting tool according to claim 9, characterized in that: The rear end of the unlocking part (32) and / or the front end of the second locking part (42) are provided with a third guide slope (322).

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