Inflation pressurizing pipe sleeve

By designing the inflatable pressurized tube sleeve, using locking components and multiple positioning holes, the problems of cumbersome operation and unstable fixing effect of traditional pressurized bandaging equipment are solved, and stable pressurized bandaging on the patient's legs and personalized compression strength are achieved.

CN222828804UActive Publication Date: 2025-05-06乐清市人民医院
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Patent Information

Application Number
CN202520575998.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-31
Publication Date
2025-05-06
Estimated Expiration
2035-03-31

AI Technical Summary

Technical Problem

Traditional pressurized bandaging equipment is complicated to operate, the pressure adjustment effect is poor, and the fixing effect is unstable, which is easy to loosen when the patient moves or moves.

Method used

An inflatable pressurized tube sleeve is designed, using locking components (including locking heads, connecting ropes and limiting blocks) and multiple positioning holes to inflate and fix the tube sleeve through inflatable joints and valves.

Benefits of technology

It realizes stable fixation of both ends of the tube sleeve body, which facilitates adjustment of tightness and improves the fixing effect; through multi-positioning hole design and elastic materials, it adapts to different leg circumferences and provides personalized compression strength.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of medical equipment, particularly relates to an air inflation pressurizing pipe sleeve, and aims to solve the problems that the conventional pressurizing bandaging mode is complicated in operation and not good enough in pressure adjusting effect; in order to solve the problems that part of existing equipment is not good enough in fixing effect during use and is prone to loosening during movement and the like, according to the scheme, the pipe sleeve comprises a pipe sleeve body, an inflation connector is fixedly installed at one end of the pipe sleeve body, the inflation connector is used for inflating the interior of the pipe sleeve body, and a valve is arranged on the inflation connector; according to the inflation pressurization pipe sleeve, the two ends of the pipe sleeve can be stably fixed through the locking assemblies, the tightness degree can be easily adjusted by adjusting the connecting rope, the locking heads are clamped firmly, and the fixing effect is improved; the multi-positioning-hole design can adapt to different leg circumferences, the elastic pipe sleeve body is combined, the inflation degree can be adjusted, personalized compression strength is provided, maintenance is easy, and use is flexible and convenient.
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Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an inflatable pressurized tube sleeve. Background Art

[0002] In the field of medical care, for patients who need to stay in bed for a long time, in order to prevent deep vein thrombosis and other problems in their lower limbs, it is usually necessary to apply pressure bandages to the patient's legs to promote blood flow. However, the traditional pressure bandage equipment still has the following problems in use:

[0003] Traditional pressure bandaging methods mostly use manual binding with bandages or elastic cloth straps, which is cumbersome to operate and difficult to accurately adjust the pressure according to the patient's specific situation. In addition, some existing pressure bandaging devices use fixing structures such as Velcro or hook and loop to complete the binding. Although these structures are convenient to use, the fixing effect is not stable enough and is easy to loosen when the patient moves or moves.

[0004] In view of the above problems, the utility model document proposes an inflatable pressurized tube sleeve. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art, such as the cumbersome operation of the traditional pressurized bandaging method, the poor pressure regulation effect, the poor fixing effect of some existing equipments and the easy loosening during activities, and proposes an inflatable pressurized tube sleeve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An inflatable pressurized tube sleeve, comprising:

[0008] A pipe sleeve body, one end of which is fixedly mounted with an inflatable joint, the inflatable joint is used to inflate the interior of the pipe sleeve body, the inflatable joint is provided with a valve, the valve is used to complete the sealing of the inflatable joint;

[0009] It also includes a locking assembly, which includes a locking head, a connecting rope and a limit block, and is used to fix the two ends of the pipe sleeve body;

[0010] It also includes multiple positioning holes, which all penetrate the pipe sleeve body and are located at one end of the pipe sleeve body close to the inflation joint. The multiple positioning holes are evenly arranged and cooperate with the locking assembly to adjust the tightening degree of the pipe sleeve body.

[0011] In one possible design, the locking assembly includes a mounting hole arranged on the sleeve body, the mounting hole passes through the sleeve body, the mounting hole is located at one end of the sleeve body away from the inflation joint, the connecting rope passes through the mounting hole, one end of the connecting rope is fixedly connected to the limit block, and the other end of the connecting rope cooperates with the locking head.

[0012] In a possible design, the locking head consists of an outer shell and a winding shaft, a wire hole is opened at the bottom of the outer shell, the wire hole is used to allow the connecting rope to pass through, two partitions are fixedly installed inside the outer shell, the winding shaft rotates and passes through the two partitions, one end of the connecting rope is fixedly connected to the outer wall of the winding shaft; a connecting rod is fixedly installed at one end of the winding shaft, and a knob is fixedly installed at the other end of the connecting rod, one end of the knob rotates and passes through the outer shell, and the knob is used to drive the winding shaft to rotate to complete the winding of the connecting rope.

[0013] In a possible design, the locking head also includes a connecting shaft fixedly installed at the other end of the winding shaft, one end of the connecting shaft is rotatably connected to an inner wall of one side of the outer shell, and an outer wall fixed sleeve of the connecting shaft is provided with a ratchet; a rotating rod is rotatably installed on the inner wall of one side of the outer shell, the rotating rod is located above the connecting shaft, and the outer wall fixed sleeve of the rotating rod is provided with a pawl, the pawl cooperates with the ratchet, and the outer wall sleeve of the rotating rod is provided with a torsion spring, one end of the torsion spring is fixedly connected to an inner wall of one side of the outer shell, and the other end of the torsion spring is fixedly connected to the outer wall of the rotating rod, and the torsion spring is used to ensure that the pawl can continue to be close to the ratchet to complete the unidirectional locking of the ratchet.

[0014] In a possible design, an outer wall fixing sleeve of the rotating rod is provided with an adjusting gear, a through hole is opened on the outer wall of the outer shell, one side edge of the adjusting gear passes through the through hole and extends to the outer wall of the outer shell, and the adjusting gear is used to facilitate the user to turn the pawl to unlock the ratchet.

[0015] In a possible design, the outer wall of the knob is provided with anti-slip grooves to ensure stable rotation of the knob.

[0016] In one possible design, the sleeve body is made of an elastic material to ensure that the diameter of the positioning hole can be changed to ensure that the locking head can pass through the positioning hole in a vertical state; the maximum length of the locking head is greater than the maximum diameter of the positioning hole to ensure that the locking head will not pass through the positioning hole in a horizontal state.

[0017] In the present application, when in use, the user can wrap the uninflated tube sleeve body around the patient's legs, at which time the tube sleeve body is similar to a rubber band; then, according to the different leg circumferences of different patients, the user can pass the locking head through the corresponding positioning hole to ensure that the tube sleeve body can be stably tied to the patient's legs; when tying the tube sleeve body, the user only needs to rotate the locking head to be parallel to the connecting rope, and then insert one end of the locking head into the positioning hole. Since the tube sleeve body itself is elastic, the locking head can pass through the corresponding positioning hole with the connecting rope under the push of external force; after the locking head passes through the positioning hole, it is not easy to detach from the positioning hole in a horizontal state. At this time, the user can turn the knob to drive the winding shaft to rotate, so that the winding shaft can rewind the connecting rope, and at the same time, with the cooperation of the locking head and the limit block, the user can complete the fixation of the two ends of the tube sleeve body; when the distance between the locking head and the limit block is shortened to a certain extent, stop turning the knob at this time, and under the action of the pawl and the ratchet, the winding shaft can Stable winding of the connecting rope can ensure that the locking head and the limit block have a good locking effect on the two ends of the tube sleeve body; thereafter, the user can connect the pipeline of the external gas supply device to the inflation connector, open the valve, and use the external gas supply device to inflate the tube sleeve body to a certain extent. At this time, the tube sleeve body will gradually expand until it reaches a suitable state, so that the tube sleeve body can further compress the patient's legs in the bound state; when the user needs to remove the tube sleeve body from the patient's legs, at this time, it is only necessary to discharge the gas inside the tube sleeve body, and then turn the adjustment gear to make the claw end of the pawl away from the ratchet wheel. At this time, the user pulls the locking head to pull out the wound connecting rope to extend the distance between the limit block and the locking head, and at the same time, the two ends of the tube sleeve body can be relaxed. Then the above operation can be performed in reverse, and the locking head can be vertically passed through the positioning hole to complete the opening of the tube sleeve body; in the same way, the user can also pass the locking head through the mounting hole to complete the disassembly of the locking assembly, which is convenient for equipment maintenance.

[0018] Beneficial effects: In the utility model, the inflatable pressurized pipe sleeve can achieve stable fixation of the two ends of the pipe sleeve body by setting a locking assembly; the locking assembly includes a locking head, a connecting rope and a limiting block, and the distance between the locking head and the limiting block can be conveniently adjusted by winding and loosening the connecting rope, thereby achieving adjustment of the tightness of the pipe sleeve body; at the same time, the design of the locking head enables it to be firmly clamped on one side of the positioning hole and is not easy to fall off, thereby improving the fixing effect of the pipe sleeve;

[0019] In the utility model, the inflatable pressurized tube sleeve, by setting a plurality of positioning holes, can select a suitable positioning hole for locking according to the specific conditions of the patient, and can achieve stable pressurized bandage for patients with different leg circumferences by adjusting the degree of winding of the connecting rope. In addition, since the tube sleeve body is made of elastic material, the tube sleeve body can provide further compression to the patient's legs by inflating it, and the inflation degree is adjustable, which is conducive to providing corresponding compression strength according to the actual conditions of different patients;

[0020] In the utility model, the inflatable pressurized tube sleeve can conveniently control the winding of the connecting rope by setting the connecting rod and the knob, thereby realizing the rapid adjustment of the tightness of the tube sleeve body; at the same time, the design of the pawl and the ratchet wheel enables the winding shaft to stably wind up the connecting rope, avoiding the problem that the connecting rope may loosen or fall off during the winding process;

[0021] In the utility model, the inflatable pressurized pipe sleeve is convenient for maintenance of the equipment. By disassembling the locking assembly, the pipe sleeve body and other parts can be easily cleaned and replaced, and the use flexibility is strong;

[0022] In the utility model, the inflatable pressurized tube sleeve can achieve stable fixation of both ends of the tube sleeve through the locking component. The tightness can be easily adjusted by adjusting the connecting rope, and the locking head is firmly connected to improve the fixing effect; the multi-positioning hole design can adapt to different leg circumferences, combined with the elastic tube sleeve body and the adjustable inflation degree, to provide personalized compression strength; the connecting rod and the knob are combined to quickly complete the installation of the tube sleeve, and the pawl ratchet ensures stable winding to avoid loosening; in addition, the equipment is easy to maintain and is flexible and convenient to use, which significantly improves the patient's comfort and treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional structural schematic diagram of an inflatable pressurized tube sleeve proposed by the utility model;

[0024] Figure 2 This is a schematic diagram of the disassembled structure of an inflatable pressurized tube sleeve proposed by the utility model;

[0025] Figure 3 This is a schematic diagram of the locking assembly structure of an inflatable pressurized sleeve proposed by the utility model;

[0026] Figure 4 This is a schematic cross-sectional structure diagram of a locking head of an inflatable pressurized tube sleeve proposed by the utility model;

[0027] Figure 5 The utility model is a schematic diagram of the internal structure of the locking head of the inflatable pressurized tube sleeve.

[0028] In the figure: 1. pipe sleeve body; 2. inflation joint; 3. valve; 4. positioning hole; 5. mounting hole; 6. connecting rope; 7. limit block; 8. locking head; 9. shell; 10. wire hole; 11. partition; 12. winding shaft; 13. connecting rod; 14. knob; 15. connecting shaft; 16. ratchet; 17. rotating rod; 18. pawl; 19. torsion spring; 20. adjusting gear; 21. through hole. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Example 1: Reference Figure 1-5 , a pipe sleeve, comprising:

[0031] The pipe sleeve body 1 has an inflation joint 2 fixedly mounted on one end of the pipe sleeve body 1, and the inflation joint 2 is used to inflate the interior of the pipe sleeve body 1. A valve 3 is provided on the inflation joint 2, and the valve 3 is used to complete the sealing of the inflation joint 2 to ensure that the gas inside the pipe sleeve body 1 does not leak.

[0032] In order to fix the two ends of the pipe sleeve body 1, the present embodiment further includes a locking assembly. The locking assembly is mainly composed of a locking head 8, a connecting rope 6 and a limiting block 7. When in use, one end of the connecting rope 6 can be passed through the mounting hole 5 at one end of the pipe sleeve body 1 away from the inflatable joint 2, and this end of the connecting rope 6 is fixedly connected to the limiting block 7. Then, the other end of the connecting rope 6 is matched with the locking head 8, and the connecting rope 6 is rolled up or released through the locking head 8 to complete the tightening or loosening of the pipe sleeve body 1.

[0033] In order to fix the two ends of the pipe sleeve body 1, the present embodiment provides a plurality of positioning holes 4 at one end of the pipe sleeve body 1 close to the inflation joint 2. These positioning holes 4 all penetrate the pipe sleeve body 1 and are evenly arranged. The positioning holes 4 cooperate with the locking assembly to fix the two ends of the pipe sleeve body 1; by passing the locking head 8 through the positioning holes 4 at different positions, the tightening degree of the pipe sleeve body 1 can be adjusted.

[0034] Furthermore, in this embodiment, the locking head 8 in the locking assembly is composed of a housing 9 and a reel 12. A wire hole 10 is provided at the bottom of the housing 9, and the wire hole 10 is used to allow the connecting rope 6 to pass through. Two partitions 11 are fixedly installed inside the housing 9, and the reel 12 rotates through the two partitions 11. One end of the connecting rope 6 is fixedly connected to the outer wall of the reel 12, so when the reel 12 rotates, the connecting rope 6 can be driven to be reeled or released.

[0035] In order to drive the winding shaft 12 to rotate, in this embodiment, a connecting rod 13 is fixedly installed on one end of the winding shaft 12, and a knob 14 is fixedly installed on the other end of the connecting rod 13. One end of the knob 14 rotates through the outer shell 9, and the knob 14 can drive the winding shaft 12 to rotate synchronously, thereby completing the winding of the connecting rope 6.

[0036] In order to ensure that the locking head 8 can remain stable after completing the winding of the connecting rope 6, a ratchet and pawl mechanism is also provided in this embodiment. Specifically, the locking head 8 also includes a connecting shaft 15 fixedly mounted on the other end of the winding shaft 12, and one end of the connecting shaft 15 is rotatably connected to the inner wall of one side of the housing 9. A ratchet 16 is fixedly sleeved on the outer wall of the connecting shaft 15. A rotating rod 17 is rotatably mounted on the inner wall of one side of the housing 9, and the rotating rod 17 is located above the connecting shaft 15. A pawl 18 is fixedly sleeved on the outer wall of the rotating rod 17, and the pawl 18 cooperates with the ratchet 16. A torsion spring 19 is also sleeved on the outer wall of the rotating rod 17, and one end of the torsion spring 19 is fixedly connected to the inner wall of one side of the housing 9, and the other end is fixedly connected to the outer wall of the rotating rod 17. When the winding shaft 12 rotates to wind up the connecting rope 6, the pawl 18 will be close to the tooth surface of the ratchet 16 to prevent the ratchet 16 from rotating in the opposite direction, thereby ensuring the stable winding of the connecting rope 6.

[0037] In order to facilitate the user to turn the pawl 18 to unlock the ratchet 16, the present embodiment further provides an adjustment gear 20 fixedly sleeved on the outer wall of the rotating rod 17. At the same time, a through hole 21 is provided on the outer wall of the housing 9, and one side edge of the adjustment gear 20 passes through the through hole 21 and extends to the outer wall of the housing 9. Therefore, the user can turn the adjustment gear 20 to drive the pawl 18 to rotate, thereby unlocking the ratchet 16 and releasing the wound connecting rope 6.

[0038] The present application can be used in the field of medical device technology, and can also be used in other fields applicable to the present application.

[0039] Example 2: Reference Figure 1 , 2 4. Improvement on the basis of Example 1: an inflatable pressurized tube sleeve, which is applied to the field of medical equipment technology;

[0040] In addition, the present embodiment also has anti-skid patterns on the outer wall of the knob 14. Therefore, the user can more conveniently and stably rotate the knob 14 to drive the rotating shaft 12 to reel in the connecting rope 6.

[0041] In this embodiment, the sleeve body 1 is made of an elastic material, which can ensure that the aperture of the positioning hole 4 can be changed. Therefore, when the locking head 8 needs to pass through the positioning hole 4, the aperture of the positioning hole 4 can be correspondingly expanded under external pulling or squeezing of the locking head 8, which can ensure the passage of the locking head 8; and when the locking head 8 passes through, the aperture of the positioning hole 4 will return to its original state, thereby ensuring that the locking head 8 will not pass through the positioning hole 4 in a horizontal state. In addition, the maximum length of the locking head 8 is greater than the maximum aperture of the positioning hole 4, which can ensure that the locking head 8 is not easy to fall out of the positioning hole 4 when it is in a horizontal state.

[0042] Furthermore, in this embodiment, the volume of the limiting block 7 is much larger than the diameter of the mounting hole 5 to prevent the limiting block 7 from passing through the mounting hole 5 and causing locking failure.

[0043] The working principle and use process of the technical solution are as follows: when in use, the user can wrap the uninflated tube sleeve body 1 around the patient's legs. At this time, the tube sleeve body 1 is similar to a rubber band; then, according to the different leg circumferences of different patients, the user can pass the locking head 8 through the corresponding positioning hole 4 to ensure that the tube sleeve body 1 can be stably tied to the patient's legs; when tying the tube sleeve body 1, the user only needs to rotate the locking head 8 to be parallel to the connecting rope 6, and then insert one end of the locking head 8 into the positioning hole 4. Since the tube sleeve body 1 itself is elastic, it can be tied to the patient's legs stably. Under the push of external force, the locking head 8 can bring the connecting rope 6 through the corresponding positioning hole 4; when the locking head 8 passes through the positioning hole 4, it is not easy to disengage from the positioning hole 4 in a horizontal state. At this time, the user can turn the knob 14 to drive the winding shaft 12 to rotate, so that the winding shaft 12 can reel in the connecting rope 6. At the same time, with the cooperation of the locking head 8 and the limit block 7, the user can complete the fixation of the two ends of the pipe sleeve body 1; when the distance between the locking head 8 and the limit block 7 is shortened to a certain extent, the knob 14 is stopped at this time, and the pawl 18 and the ratchet 16 are in contact with each other. Under the action, the reel 12 can stably reel the connecting rope 6, which can ensure that the locking head 8 and the limit block 7 have a good locking effect on the two ends of the tube sleeve body 1; after that, the user can connect the pipeline of the external air supply device to the inflation connector 2, open the valve 3, and use the external air supply device to inflate the tube sleeve body 1 to a certain extent. At this time, the tube sleeve body 1 will gradually expand until it reaches a suitable state, so that the tube sleeve body 1 can further compress the patient's legs in the bound state; when the user needs to remove the tube sleeve body 1 from the patient's legs, at this time, only the user needs to remove the tube sleeve body 1 from the patient's legs. The gas inside the pipe sleeve body 1 is discharged, and then the adjusting gear 20 is turned to make the claw end of the pawl 18 away from the ratchet 16. At this time, the user pulls the locking head 8 to pull out the rolled connecting rope 6 to extend the distance between the limit block 7 and the locking head 8, and at the same time, the two ends of the pipe sleeve body 1 can be loosened. Then the above operation can be performed in reverse, and the locking head 8 is vertically passed through the positioning hole 4 to complete the opening of the pipe sleeve body 1; in the same way, the user can also pass the locking head 8 out of the mounting hole 5 to complete the disassembly of the locking assembly, which is convenient for equipment maintenance.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An inflatable pressurized tube sleeve, characterized in that: include: A pipe sleeve body (1), one end of which is fixedly mounted with an inflation joint (2), the inflation joint (2) being used to inflate the interior of the pipe sleeve body (1), the inflation joint (2) being provided with a valve (3), the valve (3) being used to seal the inflation joint (2); It also includes a locking assembly, the locking assembly including a locking head (8), a connecting rope (6) and a limit block (7), the locking assembly is used to fix the two ends of the sleeve body (1); It also comprises a plurality of positioning holes (4), wherein the plurality of positioning holes (4) all penetrate the sleeve body (1), and the plurality of positioning holes (4) are all located at one end of the sleeve body (1) close to the inflation joint (2), the plurality of positioning holes (4) are evenly arranged, and the plurality of positioning holes (4) all cooperate with the locking assembly to adjust the tightening degree of the sleeve body (1).

2. The inflatable pressurized tube sleeve according to claim 1, characterized in that: The locking assembly comprises a mounting hole (5) arranged on the pipe sleeve body (1), the mounting hole (5) passing through the pipe sleeve body (1), the mounting hole (5) being located at an end of the pipe sleeve body (1) away from the inflation joint (2), the connecting rope (6) passing through the mounting hole (5), one end of the connecting rope (6) being fixedly connected to the limit block (7), and the other end of the connecting rope (6) being matched with the locking head (8).

3. The inflatable pressurized tube sleeve according to claim 2, characterized in that: The locking head (8) is composed of a shell (9) and a winding shaft (12). A wire hole (10) is provided at the bottom of the shell (9). The wire hole (10) is used to allow the connecting rope (6) to pass through. Two partitions (11) are fixedly installed inside the shell (9). The winding shaft (12) rotates and passes through the two partitions (11). One end of the connecting rope (6) is fixedly connected to the outer wall of the winding shaft (12). A connecting rod (13) is fixedly installed at one end of the winding shaft (12). A knob (14) is fixedly installed at the other end of the connecting rod (13). One end of the knob (14) rotates and passes through the shell (9). The knob (14) is used to drive the winding shaft (12) to rotate so as to complete the winding of the connecting rope (6).

4. The inflatable pressurized tube sleeve according to claim 3, characterized in that: The locking head (8) further comprises a connecting shaft (15) fixedly mounted on the other end of the winding shaft (12), one end of the connecting shaft (15) being rotatably connected to an inner wall of one side of the housing (9), and a ratchet (16) being fixedly sleeved on the outer wall of the connecting shaft (15); a rotating rod (17) being rotatably mounted on an inner wall of one side of the housing (9), the rotating rod (17) being located above the connecting shaft (15), a ratchet (18) being fixedly sleeved on the outer wall of the rotating rod (17), the ratchet (18) being matched with the ratchet (16), and a torsion spring (19) being sleeved on the outer wall of the rotating rod (17), one end of the torsion spring (19) being fixedly connected to an inner wall of one side of the housing (9), and the other end of the torsion spring (19) being fixedly connected to the outer wall of the rotating rod (17), the torsion spring (19) being used to ensure that the ratchet (18) can continuously be in close contact with the ratchet (16) so as to complete the unidirectional locking of the ratchet (16).

5. The inflatable pressurized tube sleeve according to claim 4, characterized in that: An adjusting gear (20) is fixedly sleeved on the outer wall of the rotating rod (17), a through hole (21) is opened on the outer wall of the housing (9), and a side edge of the adjusting gear (20) passes through the through hole (21) and extends to the outer wall of the housing (9), and the adjusting gear (20) is used to facilitate a user to turn the pawl (18) to unlock the ratchet (16).

6. The inflatable pressurized tube sleeve according to claim 3, characterized in that: The outer wall of the knob (14) is provided with anti-slip grooves, which are used to ensure stable rotation of the knob (14).

7. The inflatable pressurized tube sleeve according to claim 1, characterized in that: The sleeve body (1) is made of an elastic material and is used to ensure that the diameter of the positioning hole (4) can be changed, so as to ensure that the locking head (8) can pass through the positioning hole (4) in a vertical state; the maximum length of the locking head (8) is greater than the maximum diameter of the positioning hole (4), so as to ensure that the locking head (8) will not pass through the positioning hole (4) in a horizontal state.