Wire pressing and stripping mechanism and portable pliers
By integrating a wire crimping and stripping mechanism, the wire crimping and stripping tool solves the problem that existing tools cannot simultaneously perform wire stripping and crimping, thus simplifying the operation process and improving efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-04-07
AI Technical Summary
Existing tools cannot simultaneously meet the needs of wire stripping and crimping, resulting in complex operation, low efficiency, and inconvenience in carrying, especially posing safety hazards when used in confined or complex environments.
A wire pressing and stripping mechanism was designed, which integrates wire pressing and stripping components. Through the coordinated work of rotating components, sliding components and clamping components, the functions of wire pressing and stripping are realized. Combined with the gripping component of portable pliers, the operation process is simplified.
It simultaneously meets the needs of wire pressing and stripping, reduces the frequency of tool switching, improves operational flexibility and safety, reduces labor intensity, and increases work efficiency.
Smart Images
Figure CN224097173U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electrical tool technical field, especially a kind of line pressing and stripping mechanism and portable pliers. BACKGROUND
[0002] At present, the connection of line nose and cable is a common and key operation link. In order to realize the effective connection of cable and electrical equipment or terminal, the cable usually needs to be stripped to remove the insulating layer of the outer layer of the cable to expose the internal conductor part; at the same time, the line nose also needs to be pressed to ensure that the line nose and the cable conductor (copper wire core) can be tightly and firmly combined, so as to ensure the reliability and stability of electrical connection. However, in the actual operation process, the two steps of stripping and pressing often need to use different tools respectively to complete. At present, although various stripping tools and pressing tools exist in the market, most of them have single function and cannot meet the needs of stripping and pressing at the same time, so that the operator needs to frequently switch different tools when performing cable connection operation, which increases the complexity and time cost of operation. Especially when facing a large number of cable connection tasks, this inefficient operation mode will significantly reduce the overall work efficiency, and the operator needs to carry stripping tools and pressing tools at the same time, which increases the carrying burden of tools. In some small space or complex operation environment, carrying and using multiple tools will be more inconvenient, and even may affect the flexibility and safety of operation. Moreover, in actual work, since some structure connection diagrams cannot be pressed by pressing tools, the operator often uses a utility knife and other non-professional tools to strip the insulating layer of the cable. The use of utility knife not only cannot guarantee the stripping effect, but also is easy to scratch the cable conductor, which may cause damage to the conductor. SUMMARY
[0003] This part aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part and the abstract of the specification and the utility model name to avoid obscuring the purpose of this part, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.
[0004] In view of the above or the problem that different tools need to be frequently switched in the prior art, which cannot meet the needs of stripping and pressing at the same time, the utility model is proposed.
[0005] Therefore, the purpose of the utility model is to provide a line pressing and stripping mechanism.
[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: It includes a main body component, the main body component including a support plate and two fixing rings disposed on the side wall of the support plate; a wire pressing component, the wire pressing component including a rotating assembly disposed on the side wall of the fixing rings, a sliding assembly disposed on the side wall of the fixing rings, and a wire pressing assembly disposed on the sliding assembly; and a wire stripping component, the wire stripping component including a clamping assembly disposed on the wire pressing assembly, an adjusting assembly disposed on one of the clamping assemblies, and a wire stripping assembly disposed on the rotating assembly.
[0007] In a preferred embodiment of the wire pressing and stripping mechanism of this utility model, the rotating assembly includes a rotating ring disposed on the side wall of the fixed ring, a protrusion disposed on the inner side wall of the rotating ring, and a pushing surface disposed on the side wall of the protrusion.
[0008] In a preferred embodiment of the wire pressing and stripping mechanism of this utility model, the sliding component includes a fixing block disposed on the side wall of the fixing ring and a trapezoidal block disposed between two corresponding fixing blocks.
[0009] As a preferred embodiment of the wire pressing and stripping mechanism of this utility model, the wire pressing assembly includes a wire pressing block disposed on the side wall of the trapezoidal block, a wire pressing groove disposed on the side wall of the wire pressing block, a first mating surface disposed on the side wall of the wire pressing block, and a second mating surface disposed on the side wall of the wire pressing block.
[0010] As a preferred embodiment of the wire pressing and stripping mechanism of this utility model, the clamping assembly includes a connecting rod disposed on the side wall of the pressing block, a clamping block disposed on the side wall of the connecting rod, a protective pad disposed on the side wall of the clamping block, and a movable groove disposed on the side wall of one of the fixed rings.
[0011] As a preferred embodiment of the wire pressing and stripping mechanism of this utility model, the adjusting component includes a limiting groove disposed on the side wall of the clamping block and the protective pad, an adjusting block disposed in the two limiting grooves, a threaded post disposed on the side wall of the clamping block, and a throttle handle disposed on the side wall of the threaded post.
[0012] As a preferred embodiment of the wire pressing and stripping mechanism of this utility model, the wire stripping assembly includes a through groove disposed on the side wall of the protective pad and a wire stripping blade disposed on the side wall of the adjusting block.
[0013] The advantages of this wire crimping and stripping mechanism are as follows: By setting up a main body component and a wire crimping component, this invention can meet the need for crimping wire lugs when crimping is required, and by setting up a wire stripping component, it can meet the need for stripping wires when stripping is required. This achieves the simultaneous fulfillment of the needs for crimping and stripping functions, solving the problem of having to frequently switch between different tools and not being able to meet the needs of crimping and stripping at the same time. It achieves the effect of not needing to frequently switch between different tools and being easy to operate.
[0014] This utility model also provides the following technical solution: a portable clamp, and a gripping component, the gripping component including a gripping assembly disposed on the side wall of the support plate, and a pushing assembly disposed on the side wall of the gripping assembly.
[0015] In a preferred embodiment of the portable pliers of this utility model, the gripping assembly includes a fixed circular block disposed on the side wall of the support plate, a movable circular block disposed on the fixed circular block, gripping members disposed on the side walls of the fixed circular block and the movable circular block, and a spring disposed between the two gripping members.
[0016] In a preferred embodiment of the portable pliers of this utility model, the pushing component includes a connector disposed on the side wall of the movable circular block, a connecting groove disposed on the side wall of the connector, a movable component disposed in the connecting groove, a connecting block disposed on the side wall of the movable component, and a limiting block disposed on the lower side of the movable component.
[0017] The advantages of this portable pliers are: the gripping component assists in crimping and stripping wires, making it easier to meet the needs of crimping and stripping, thus improving operational flexibility and practicality. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0019] Figure 1 This is an overall schematic diagram of the wire crimping and stripping mechanism and portable pliers.
[0020] Figure 2 This is an overall schematic diagram of the wire crimping and stripping mechanism and portable pliers.
[0021] Figure 3 This is a schematic diagram of the structural connections for the wire stripping and crimping mechanism and portable pliers.
[0022] Figure 4This is a partial structural diagram of a wire stripping and crimping mechanism and portable pliers.
[0023] Figure 5 A schematic diagram of the overall components for the wire crimping and stripping mechanism and the gripping assembly for portable pliers.
[0024] Figure 6 A schematic diagram of the overall wire stripping mechanism and the wire stripping component used in the portable pliers.
[0025] Figure 7 Rear view for wire crimping and stripping mechanism and portable pliers
[0026] Figure 8 This is a schematic diagram of the structural connections for the wire stripping and crimping mechanism and portable pliers. Detailed Implementation
[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0029] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0030] Example 1
[0031] Reference Figures 1-3 This is the first embodiment of the present invention. This embodiment provides a wire pressing and stripping mechanism that can simultaneously meet the needs of wire pressing and stripping functions. It includes: a main body 100, which includes a support plate 101 and two fixing rings 102 disposed on the side wall of the support plate 101; a wire pressing component 200, which includes a rotating component 201 disposed on the side wall of the fixing rings 102, a sliding component 202 disposed on the side wall of the fixing rings 102, and a wire pressing component 203 disposed on the sliding component 202; and a wire stripping component 300, which includes a clamping component 301 disposed on the wire pressing component 203, an adjusting component 302 disposed on one of the clamping components 301, and a wire stripping component 303 disposed on the rotating component 201.
[0032] Specifically, the support plate 101 is fixedly connected to two fixed rings 102, the two fixed rings 102 are symmetrically arranged, four sliding components 202 are provided, and the four sliding components 202 are distributed in a ring array, and two clamping components 301 are provided, and the two clamping components 301 are symmetrically arranged.
[0033] When in use, when it is necessary to crimp the wire lug, the wire lug is passed through the fixing ring 102 and placed inside the rotating component 201. Then, by turning the rotating component 201, the sliding component 202 is pushed, so that the crimping component 203 crimps the wire lug, so that the copper wire core inside the wire lug and the metal part at the front end of the wire lug are in full contact to achieve conductivity.
[0034] When it is necessary to strip the cable, the cable can be placed between the two clamping components 301 (it should be noted that the cable to be stripped does not need to pass through the fixed ring 102 and the rotating component 201). Then, by rotating the component 201, the sliding component 202 drives the wire pressing component 203 to move, so that the two clamping components 301 move closer to each other. Then, by adjusting the component 302, the stripping component 303 moves closer to the cable and contacts the cable, so as to realize the circumferential or longitudinal stripping operation of the cable.
[0035] In summary, the combination of the main component 100, the wire pressing component 200, and the wire stripping component 300 can simultaneously meet the requirements of wire pressing and wire stripping functions, improve operational flexibility and safety, eliminate the need for frequent switching between different tools, and make operation simple, time-saving, and labor-saving.
[0036] Example 2
[0037] Reference Figures 1-6 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a wire pressing and stripping mechanism, which includes a rotating assembly 201 including a rotating ring 201a disposed on the side wall of the fixed ring 102, a protrusion 201b disposed on the inner side wall of the rotating ring 201a, and a pushing surface 201c disposed on the side wall of the protrusion 201b.
[0038] The rotating ring 201a is rotatably connected to the fixed ring 102. There are four protrusions 201b, which are arranged in a ring array. The protrusions 201b are fixedly connected to the inner wall of the rotating ring 201a. Each protrusion 201b has two pushing surfaces 201c, which are arranged symmetrically.
[0039] Preferably, the sliding component 202 includes a fixing block 202a disposed on the side wall of the fixing ring 102, and a trapezoidal block 202b disposed between two corresponding fixing blocks 202a; the pressure assembly 203 includes a pressure block 203a disposed on the side wall of the trapezoidal block 202b, a pressure groove 203b disposed on the side wall of the pressure block 203a, a first mating surface 203c disposed on the side wall of the pressure block 203a, and a second mating surface 203d disposed on the side wall of the pressure block 203a.
[0040] It should be noted that there are four fixed blocks 202a, and the four fixed blocks 202a are arranged in a circular array. The trapezoidal block 202b is slidably connected to the corresponding two fixed blocks 202a. The mating surfaces 1 203c and 203d of the two adjacent pressure blocks 203a are in contact. The pressure block 203a is fixedly connected to the trapezoidal block 202b, and the pushing surface 201c is in contact with the trapezoidal block 202b.
[0041] In use, when crimping the wire lugs, the wire lugs are passed through the fixing ring 102 and positioned between the four crimping blocks 203a. The rotating ring 201a is then turned clockwise, causing the four protrusions 201b to rotate with it. Since the pushing surface 201c on the protrusion 201b contacts the trapezoidal block 202b, the rotation of the protrusion 201b pushes the trapezoidal block 202b. This causes the corresponding trapezoidal block 202b to push the crimping blocks 203a under the action of the fixing block 202a, thus reducing the gap between the four crimping blocks 203a. Figure 2 As shown, the four wire clamping blocks 203a are used to clamp the wire lugs.
[0042] Example 3
[0043] Reference Figures 1-8 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a wire pressing and stripping mechanism, which includes a clamping assembly 301 including a connecting rod 301a disposed on the side wall of the wire pressing block 203a, a clamping block 301b disposed on the side wall of the connecting rod 301a, a protective pad 301c disposed on the side wall of the clamping block 301b, and a movable groove 301d disposed on the side wall of one of the fixing rings 102.
[0044] Specifically, one of the wire clamping blocks 203a is fixedly connected to the connecting rod 301a, and the clamping block 301b is fixedly connected to the connecting rod 301a. The protective pad 301c is fixedly connected to the clamping block 301b.
[0045] Furthermore, the adjustment assembly 302 includes a limiting groove 302a disposed on the side wall of the clamping block 301b and the protective pad 301c, an adjustment block 302b disposed in the two limiting grooves 302a, a threaded post 302c disposed on the side wall of the clamping block 301b, and a throttle 302d disposed on the side wall of the threaded post 302c; the wire stripping assembly 303 includes a through groove 303a disposed on the side wall of the protective pad 301c, and a wire stripping blade 303b disposed on the side wall of the adjustment block 302b.
[0046] Specifically, the two limiting slots 302a are connected, and the adjusting block 302b is slidably connected to the limiting slot 302a, such as... Figure 6 One of the clamping blocks 301b has a threaded groove on its side wall that is compatible with the threaded post 302c, and the threaded groove is connected to the limiting groove 302a, so that the threaded post 302c and one of the clamping blocks 301b are threadedly connected. The handle 302d is fixedly connected to the threaded post 302c, the threaded post 302c is rotatably connected to the adjusting block 302b, the through groove 303a is connected to the limiting groove 302a, the wire stripper head 303b is fixedly connected to the adjusting block 302b, and the wire stripper head 303b is arranged in a pyramidal shape.
[0047] In use, when it is necessary to strip the cable, place the cable between the two protective pads 301c. Then, rotate the rotating ring 201a clockwise, causing the protrusion 201b to push the trapezoidal block 202b to move, thereby moving the wire clamping block 203a. As the two connecting rods 301a move along with the corresponding wire clamping blocks 203a, the clamping blocks 301b move closer together under the action of the movable groove 301d, bringing the two protective pads 301c into contact with the cable, thus achieving cable stripping. The clamping action is followed by rotating the handle 302d, causing the threaded column 302c to move into the limiting groove 302a under the action of the thread. This causes the adjusting block 302b to move the wire stripping head 303b out of the through groove 303a and into contact with the cable, thus achieving the purpose of longitudinal and circumferential cutting of the cable by the wire stripping head 303b. This effectively avoids scratching the cable conductor when using a utility knife to strip the cable and allows the cable to be clamped, making it convenient for workers to perform other operations on the cable.
[0048] Example 4
[0049] Reference Figures 1-5 This is the fourth embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a portable clamp, which includes a gripping component 400. The gripping component 400 includes a gripping assembly 401 disposed on the side wall of the support plate 101 and a pushing assembly 402 disposed on the side wall of the gripping assembly 401.
[0050] When in use, by holding component 401, the pushing component 402 pushes the rotating ring 201a to deflect at an angle, thereby achieving the function of pressing or stripping the wire.
[0051] Furthermore, refer to Figure 4 and Figure 5 The gripping assembly 401 includes a fixed circular block 401a disposed on the side wall of the support plate 101, a movable circular block 401b disposed on the fixed circular block 401a, gripping members 401c disposed on the side walls of the fixed circular block 401a and the movable circular block 401b, and a spring 401d disposed between the two gripping members 401c; the pushing assembly 402 includes a connecting member 402a disposed on the side wall of the movable circular block 401b, a connecting groove 402b disposed on the side wall of the connecting member 402a, a movable member 402c disposed in the connecting groove 402b, a connecting block 402d disposed on the side wall of the movable member 402c, and a limiting block disposed on the lower side of the movable member 402c.
[0052] Specifically, the fixed circular block 401a is fixedly connected to the support plate 101, the movable circular block 401b is rotatably connected to the fixed circular block 401a, the two gripping parts 401c are symmetrically arranged, the two gripping parts 401c are fixedly connected to the spring 401d, the connecting part 402a is fixedly connected to the movable circular block 401b, the movable part 402c is slidably connected to the connecting part 402a through the connecting groove 402b, the connecting block 402d is fixedly connected to the rotating ring 201a, the movable part 402c is rotatably connected to the connecting block 402d, and the movable part 402c is fixedly connected to the limiting block.
[0053] When in use, if wire pressing or stripping is required, the operator only needs to apply force to the gripper 401c, causing the gripper 401c on the left to move closer to the gripper 401c on the right. This causes the movable block 401b to drive the connector 402a to rotate counterclockwise. As the connector 402a moves along with the connector 402c in the connecting groove 402b, the movable block 402c drives the connecting block 402d to move to the lower left. At this time, since the connecting block 402d is rotatably connected to the movable block 402c and fixedly connected to the rotating ring 201a, the connecting block 402d will drive the rotating ring 201a to rotate clockwise as the movable block 402c moves to the left. This assists in the angular deflection of the rotating ring 201a, thus assisting in wire pressing and stripping. By holding and driving the rotating ring 201a to rotate, the operator can achieve the purpose of wire pressing and stripping with less effort, improving the flexibility of operation and enhancing practicality.
[0054] It should be noted that, as Figure 1As shown, the overall design differs significantly from common wire crimping / stripping pliers. By arranging the crimping component 200 and the stripping component 300 perpendicular to the holding component 400, this unique design makes crimping and stripping operations more convenient and less strenuous compared to traditional wire crimping / stripping pliers where the crimping / stripping parts and the holding part are on the same horizontal plane. Because the holding component 400 and the operating parts are not on the same horizontal plane, the user can more naturally utilize the strength of their wrist and arm during operation, reducing fatigue caused by uncomfortable operating angles. At the same time, the vertical layout also provides more stable support for crimping and stripping, further improving the accuracy and efficiency of the operation. In actual use, it can significantly improve work efficiency and reduce labor intensity, and is especially suitable for long-term or high-frequency crimping and stripping operations.
[0055] In summary, the combination of the holding component 401 and the pushing component 402 can assist in pressing and stripping wires, achieving the purpose of pressing and stripping wires more effortlessly, improving operational flexibility and practicality.
[0056] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0057] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.
[0058] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.
[0059] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A wire pressing and stripping mechanism, characterized in that: include, The main body component (100) includes a support plate (101) and two fixing rings (102) disposed on the side wall of the support plate (101); A wire pressing component (200) includes a rotating assembly (201) disposed on the side wall of a fixed ring (102), a sliding assembly (202) disposed on the side wall of the fixed ring (102), and a wire pressing assembly (203) disposed on the sliding assembly (202). The wire stripping component (300) includes a clamping component (301) disposed on the wire pressing component (203), an adjusting component (302) disposed on one of the clamping components (301), and a wire stripping component (303) disposed on the rotating component (201).
2. The wire pressing and stripping mechanism as described in claim 1, characterized in that: The rotating assembly (201) includes a rotating ring (201a) disposed on the side wall of the fixed ring (102), a protrusion (201b) disposed on the inner side wall of the rotating ring (201a), and a pushing surface (201c) disposed on the side wall of the protrusion (201b).
3. The wire pressing and stripping mechanism as described in claim 2, characterized in that: The sliding component (202) includes a fixing block (202a) disposed on the side wall of the fixing ring (102) and a trapezoidal block (202b) disposed between two corresponding fixing blocks (202a).
4. The wire pressing and stripping mechanism as described in claim 3, characterized in that: The pressure line assembly (203) includes a pressure line block (203a) disposed on the side wall of the trapezoidal block (202b), a pressure line groove (203b) disposed on the side wall of the pressure line block (203a), a first mating surface (203c) disposed on the side wall of the pressure line block (203a), and a second mating surface (203d) disposed on the side wall of the pressure line block (203a).
5. The wire pressing and stripping mechanism as described in claim 4, characterized in that: The clamping assembly (301) includes a connecting rod (301a) disposed on the side wall of the pressure block (203a), a clamping block (301b) disposed on the side wall of the connecting rod (301a), a protective pad (301c) disposed on the side wall of the clamping block (301b), and a movable groove (301d) disposed on the side wall of one of the fixing rings (102).
6. The wire pressing and stripping mechanism as described in claim 5, characterized in that: The adjustment assembly (302) includes a limiting groove (302a) disposed on the side wall of the clamping block (301b) and the protective pad (301c), an adjustment block (302b) disposed in the two limiting grooves (302a), a threaded post (302c) disposed on the side wall of the clamping block (301b), and a throttle (302d) disposed on the side wall of the threaded post (302c).
7. The wire pressing and stripping mechanism as described in claim 6, characterized in that: The wire stripping assembly (303) includes a through groove (303a) disposed on the side wall of the protective pad (301c) and a wire stripping blade (303b) disposed on the side wall of the adjusting block (302b).
8. A portable pair of pliers, characterized in that: Including the wire pressing and stripping mechanism according to any one of claims 1 to 7, and, The gripping component (400) includes a gripping assembly (401) disposed on the side wall of the support plate (101) and a pushing assembly (402) disposed on the side wall of the gripping assembly (401).
9. The portable pliers as described in claim 8, characterized in that: The grip assembly (401) includes a fixed circular block (401a) disposed on the side wall of the support plate (101), a movable circular block (401b) disposed on the fixed circular block (401a), grip members (401c) disposed on the side walls of the fixed circular block (401a) and the movable circular block (401b), and a spring (401d) disposed between the two grip members (401c).
10. The portable pliers as described in claim 9, characterized in that: The pushing component (402) includes a connector (402a) disposed on the side wall of the movable circular block (401b), a connecting groove (402b) disposed on the side wall of the connector (402a), a movable component (402c) disposed in the connecting groove (402b), a connecting block (402d) disposed on the side wall of the movable component (402c), and a limiting block disposed on the lower side of the movable component (402c).