Fast gear-shifting slender safety knife
By designing small push components in the knife to control the linear movement of large push components and blades, and using the cooperation of toothed gears and movable elastic strips, the flexible adjustment of blade length and automatic retraction are achieved, and the existing knife is solved The problems of inconvenience and insufficient security improve the convenience of use and structural stability.
Patent Information
- Application Number
- CN202421024102.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-13
AI Technical Summary
The existing knife needs to be frequently pushed out or folded during use, which leads to inconvenience in use and is prone to scratches due to exposed blades, and the blade length cannot be flexibly adjusted according to the cutting depth, which limits the scope of use of safety props.
A fast gear adjustment slender safety knife is designed to control the stroke length of the large push assembly through the linear motion of the small push assembly, drive the exposed length of the blade, and realize the self-locking function by combining the toothed gear and the movable elastic strip. Ensure that the blade is no longer pushed at the required length and has automatic backing function to enhance structural stability and safety.
It realizes flexible adjustment of blade length, improves convenience and safety of use, avoids the risk of scratches caused by exposure of blades, and enhances the structural stability and scope of use of the tool.
Smart Images
Figure CN222270374U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of knife structure, in particular to a fast-shifting slim safety knife. Background Art
[0002] When using an ordinary knife, you usually need to push out or fold the blade out first so that the blade is exposed before you can use it. After use, you need to manually retract the blade. However, in most of the use processes, we need to use the knife frequently, which leads to us not retracting the blade during use, but leaving the blade exposed and placed aside. This will make it easy for us to be scratched by the exposed blade during use, and even hurt people around us. For safety reasons, we frequently retract the blade and then push it out or fold it again during use, which is very troublesome, wastes a lot of time, and makes it inconvenient to use.
[0003] The existing safety knife cannot flexibly adjust the length of the blade according to the actual cutting depth, and when the blade length is adjusted, the blade is easy to slide into the shell when the force used is slightly greater, which is inconvenient to use and limits the scope of use of the safety tool.
[0004] In summary, the utility model provides a fast-shifting slim safety knife to solve the above problems. Utility Model Content
[0005] In view of the deficiencies in the prior art, the purpose of the present utility model is to provide a fast-adjustable slim safety knife, which has the advantage that the tool controls the stroke length of the large push-control assembly through the linear motion of the small push-control assembly, and at the same time the large push-control assembly drives the exposed length of the blade, the device is simple, and the toothed gear inside the tool cooperates with the movable spring bar in the small push-control assembly, that is, when the large push-control assembly drives the blade to move to the required length, the ramp block in the large push-control assembly will push the movable spring bar and the positioning convex bump in the small push-control assembly to the lateral direction, so that the positioning convex bump and the toothed gear cooperate to produce a self-locking function, thereby preventing the large push-control assembly from being pushed.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A quick-shifting slim safety knife comprises: a shell, a handle is arranged on one side of the shell, a slot one is provided on the upper part of the shell, a slot two is provided on the bottom of the shell, a large push-control component is slidably fitted in the slot one, two limit plates are slidably fitted in the bottom of the large push-control component, a stopper is fixed at one end away from the handle between the two limit plates, a fixing plate is arranged at the bottom of the two limit plates, a toothed groove is provided in the middle part of the fixing plate, a toothed gear is arranged on one side of the toothed groove, a small push-control component is slidably fitted in the toothed groove, and the small push-control component is slidably fitted in the slot two.
[0008] By adopting the above technical solution, the large pusher assembly is pushed to drive the blade to the desired position, and the ramp plate in the large pusher assembly will drive the small pusher assembly to move. When the positioning bulge on one side of the movable elastic bar in the small pusher assembly is only matched with the toothed gear position, a self-locking function will be generated, so that the large pusher assembly can no longer be pushed, while also retaining the function of automatically returning to the starting position. When the small pusher assembly is at the starting position, the large pusher assembly cannot be pushed and the blade tip is not exposed, meeting the safety requirements. When the small pusher assembly is at the end gear position, the large pusher assembly is pushed and the blade is fully exposed for the longest time, and the large pusher assembly can also automatically return to the starting position, thereby realizing the adjustability of the blade state, and the design of the limit plate can enhance the stability of the tool structure and resist the lateral pressure of the tool when it is in use.
[0009] The utility model is further configured as follows: the large push system assembly includes a large push plate that is slidably fitted in a slot, a support plate and a connecting plate are respectively fixed on both sides of the bottom of the large push plate, a slot is opened in the middle of the connecting plate, and a curved hook is fixed in the slot, a ramp block is fixed at one end close to the handle between the two connecting plates, a placement plate is fixed at the bottom of the two connecting plates, and a fixing block is fixed on the upper part of the placement plate.
[0010] By adopting the above technical solution, when the large push plate is pushed from the front to the required position, the design of the ramp plate prevents the large push plate from being pushed, and can meet the requirement of automatically returning to the starting point. The design of the placement plate can meet the requirement of placing the blade. The hook is L-shaped, and the design of the hook can stably fix the spring, which is more convenient for flexible use of the tool.
[0011] The utility model is further configured as follows: the small push system assembly comprises a small push plate which is slidably fitted in the second groove, a movable spring bar is fixed on the upper part of the small push plate, and two positioning convex hulls are installed on one side of the movable spring bar.
[0012] By adopting the above technical solution, the toothed gear position and the positioning convex bump on one side of the movable spring bar cooperate with each other. Pushing the small push plate can drive the movable spring bar to slide on the toothed gear position. When the positioning convex bump moves to a certain position, the large push assembly can be limited, thereby preventing the large push assembly from being pushed, making it more convenient to use the tool flexibly.
[0013] The utility model is further configured as follows: a connecting rod is fixed to an upper portion of one side of the limiting plate close to the handle, a spring is sleeved around the connecting rod, and the other end of the spring is connected to the hook.
[0014] By adopting the above technical solution, when the large push plate is pushed, the large push plate drives the spring to move, causing the spring to deform. When the large push plate is pushed in the opposite direction, the large push plate assembly can return to the starting point under the action of the spring. At this time, the spring restores its original length, and the operation is simple and convenient.
[0015] The utility model is further configured as follows: a blade is arranged on the upper part of the placing plate, a special-shaped groove is opened on the upper part of the blade, and the special-shaped groove is matched with the fixing block.
[0016] By adopting the above technical solution, the blade is designed as a parallelogram, and the ends of the groove of the special-shaped groove are large and the middle is small, that is, the design of the special-shaped groove can better fix the blade.
[0017] The utility model is further configured as follows: the positioning convex bump is slidably matched with the tooth-shaped gear position in the tooth-shaped groove.
[0018] By adopting the above technical solution, the shape of the tooth block is adapted to the shape of the toothed gear, that is, the tooth block can slide in the toothed gear, thereby achieving the limitation of the large push-type assembly, which can improve the use range of the tool.
[0019] The utility model is further configured as follows: a plurality of groups of convex points are fixed on the upper part of the large push plate.
[0020] By adopting the above technical solution, the design of the convex point increases the contact area between the large push plate and the hand, thereby increasing the friction force, making it easier to push the large push plate and improving the use efficiency of the tool.
[0021] In summary, the beneficial technical effects of the utility model are:
[0022] 1. The stroke length of the large push assembly is controlled by the linear motion of the small push assembly, and the large push assembly drives the exposed length of the blade. The device is simple, and the toothed gear inside the tool cooperates with the movable spring bar in the small push assembly. That is, when the large push assembly drives the blade to move to the required length, the ramp block in the large push assembly will push the movable spring bar and the positioning convex hull in the small push assembly to the lateral direction, so that the positioning convex hull cooperates with the toothed gear to produce a self-locking function, thereby preventing the large push assembly from being pushed.
[0023] 2. When the large push plate is pushed from the front to the desired position, the design of the ramp plate prevents the large push plate from being pushed, and can meet the need of automatically returning to the starting point. The design of the placement plate can meet the need of placing the blade. The hook is an L-shaped structure, and the design of the hook can stably fix the spring, which is more convenient for the flexible use of the tool.
[0024] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0026] Figure 1This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;
[0027] Figure 2 This is a schematic diagram of the structure of a large push-pull assembly according to an embodiment of the utility model;
[0028] Figure 3 It is a partial structural schematic diagram of an embodiment of the utility model;
[0029] Figure 4 It is a partial bottom view of the structure of an embodiment of the utility model;
[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0031] 1. Shell; 101. Notch 1; 102. Notch 2; 2. Blade; 201. Special-shaped groove; 3. Large push assembly; 4. Fixed plate; 401. Toothed groove; 5. Small push assembly; 6. Fixed block; 7. Placement plate; 8. Support plate; 9. Connecting plate; 10. Slope block; 11. Hook; 12. Handle; 14. Connecting rod; 15. Spring; 16. Limit plate; 17. Block; 18. Movable spring bar; 19. Positioning convex bump; 20. Large push plate; 21. Small push plate; 22. Bump; 23. Toothed gear position. DETAILED DESCRIPTION
[0032] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0033] Reference Figure 1-4 , which is a fast-shifting slim safety knife disclosed in the utility model, comprising: a shell 1, a handle 12 is arranged on one side of the shell 1, a notch 101 is provided on the upper part of the shell 1, a notch 2 102 is provided on the bottom of the shell 1, a large push assembly 3 is slidably matched in the notch 101, two limit plates 16 are slidably matched at the bottom of the large push assembly 3, a stopper 17 is fixed at one end away from the handle 12 between the two limit plates 16, a fixing plate 4 is arranged at the bottom of the two limit plates 16, a toothed groove 401 is provided in the middle part of the fixing plate 4, a toothed gear 23 is arranged on one side of the toothed groove 401, a small push assembly 5 is slidably matched in the toothed groove 401, and the small push assembly 5 is slidably matched in the notch 2 102;
[0034] A connecting rod 14 is fixed to the upper part of the limit plate 16 near the handle 12, and a spring 15 is sleeved around the connecting rod 14, and the other end of the spring 15 is connected to the hook 11;
[0035] The upper part of the placing plate 7 is provided with a blade 2, and the upper part of the blade 2 is provided with a special-shaped groove 201, and the special-shaped groove 201 is adapted to the fixing block 6;
[0036] The application of one aspect of this embodiment is as follows: when the tool needs to be assembled, first install the bottom of the large push assembly 3 on the upper part of the limit plate 16 and the stop block 17, then connect one end of the spring 15 to the connecting rod 14, connect the other end of the spring 15 to the hook 11, and then install the fixing plate 4 on the bottom of the limit plate 16, install the small push assembly 5 in the toothed groove 401 in the middle of the fixing plate 4, and then install the blade 2 on the upper part of the placement plate 7 in the large push assembly 3, and place the fixing block 6 in the special-shaped groove 201, finally align the notch 101 and the notch 2 102 in the shell 1 with the large push assembly 3 and the small push assembly 5 respectively, so that the large push assembly 3 and the small push assembly 5 slide and cooperate in the notch 1 101 and the notch 2 102 respectively, and finally install the handle 12 on one side of the shell 1 to achieve the installation of the tool.
[0037] When the tool is needed, the large push plate 20 is pushed forward, and the large push plate 20 drives the support plate 8 and the connecting plate 9 to move forward, so that the hook 11 drives the spring 15 to stretch, and the ramp block 10 drives the small push plate 21 to move forward, that is, drives the movable spring bar 18 to move on the toothed gear position 23. When the positioning convex bump 19 on one side of the movable spring bar 18 is tightly matched with the toothed gear position 23, a self-locking function is generated. At this time, the large push plate 20 drives the blade 2 to slide out of the housing 1 and move to the desired position, and the tool can be used.
[0038] When it is necessary to restore the tool to its original state, the small push plate 21 is pushed in the reverse direction, and the large push plate 20 is pushed in the reverse direction. The large push plate 20 returns to the starting position under the action of the spring 15, and the blade 2 can be driven to slide into the housing 1. The small push plate 21 is pushed in the reverse direction again, and the movable spring bar 18 can be driven to move on the toothed gear position 23 and then return to the starting position, and the tool can be restored to its original state.
[0039] Reference Figure 2 The large push assembly 3 of this embodiment includes a large push plate 20 that slides in a slot 101, and a support plate 8 and a connecting plate 9 are fixed to both sides of the bottom of the large push plate 20. A slot is opened in the middle of the connecting plate 9, and a hook 11 is fixed in the slot. A ramp block 10 is fixed at one end between the two connecting plates 9 near the handle 12, a placement plate 7 is fixed to the bottom of the two connecting plates 9, and a fixing block 6 is fixed to the upper part of the placement plate 7. A plurality of groups of protrusions 22 are fixed to the upper part of the large push plate 20. When the large push-system component 3 needs to be installed, first fix the protrusion 22 on the upper part of the large push plate 20, then install the support plate 8 and the connecting plate 9 on both sides of the bottom of the large push plate 20 respectively, and then install the hook 11 in the groove in the middle of the connecting plate 9, and the opening of the hook 11 faces away from the handle 12, fix the ramp block 10 between the support plate 8 and the connecting plate 9, and at the end close to the handle 12, fix the placement plate 7 at the bottom of the support plate 8 and the connecting plate 9 away from the handle 12, and then fix the fixing block 6 on the upper part of the placement plate 7, and the installation of the large push-system component 3 can be completed.
[0040] Reference Figure 3 The small push control assembly 5 of this embodiment includes a small push plate 21 that is slidably fitted in the slot 102, a movable spring bar 18 is fixed to the upper part of the small push plate 21, and two positioning convex bumps 19 are installed on one side of the movable spring bar 18, and the positioning convex bumps 19 are slidably fitted with the toothed stop 23 in the toothed groove 401. When the small push control assembly 5 needs to be installed, the movable spring bar 18 is installed at the bottom of the small push plate 21, and the positioning convex bump 19 is fixed to one side of the movable spring bar 18, and finally the positioning convex bump 19 in the small push control assembly 5 is meshed with the toothed stop 23, and the installation of the small push control assembly 5 can be completed.
[0041] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. Quick-shift slim safety knife, including: The shell (1) is characterized in that a handle (12) is arranged on one side of the shell (1), a notch 1 (101) is provided on the upper part of the shell (1), a notch 2 (102) is provided on the bottom of the shell (1), a large push-control component (3) is slidably fitted in the notch 1 (101), two limit plates (16) are slidably fitted on the bottom of the large push-control component (3), a stopper (17) is fixed at one end of the two limit plates (16) away from the handle (12), a fixing plate (4) is arranged on the bottom of the two limit plates (16), a toothed groove (401) is provided in the middle part of the fixing plate (4), a toothed stopper (23) is arranged on one side of the toothed groove (401), a small push-control component (5) is slidably fitted in the toothed groove (401), and the small push-control component (5) is slidably fitted in the notch 2 (102).
2. The fast-shifting slim safety knife according to claim 1, characterized in that: The large push assembly (3) comprises a large push plate (20) which is slidably fitted in a slot (101), a support plate (8) and a connecting plate (9) being fixed to both sides of the bottom of the large push plate (20), a slot being provided in the middle of the connecting plate (9), and a hook (11) being fixed in the slot, a ramp block (10) being fixed at one end close to the handle (12) between the two connecting plates (9), a placement plate (7) being fixed at the bottom of the two connecting plates (9), and a fixing block (6) being fixed to the upper part of the placement plate (7).
3. The fast-shifting slim safety knife according to claim 1, characterized in that: The small push assembly (5) comprises a small push plate (21) slidably fitted in the second slot (102), a movable spring bar (18) being fixed on the upper part of the small push plate (21), and two positioning convex bumps (19) being installed on one side of the movable spring bar (18).
4. The fast-shifting slim safety knife according to claim 1, characterized in that: A connecting rod (14) is fixed to the upper portion of one side of the limiting plate (16) close to the handle (12), a spring (15) is sleeved around the circumference of the connecting rod (14), and the other end of the spring (15) is connected to the curved hook (11).
5. The fast-shifting slim safety knife according to claim 2, characterized in that: A blade (2) is mounted on the upper portion of the placement plate (7), a special-shaped groove (201) is provided on the upper portion of the blade (2), and the special-shaped groove (201) is matched with the fixing block (6).
6. The fast-shifting slim safety knife according to claim 3, characterized in that: The positioning convex bump (19) is slidably matched with the toothed stop (23) in the toothed groove (401).
7. The fast-shifting slim safety knife according to claim 2, characterized in that: A plurality of groups of protrusions (22) are fixed on the upper portion of the large push plate (20).