Insulating high-temperature shielding cable

Abstract

The utility model provides an insulating high-temperature shielding cable, which relates to the technical field of cables and comprises a cable body, the cable body comprises a sheath layer, a shielding layer is fixedly mounted on the inner wall of the sheath layer, and an insulating layer is fixedly mounted on the inner wall of the shielding layer. According to the utility model, the long rod is arranged on the outer wall of the circular ring, and the sliding ring is connected to the long rod in a sliding manner, so that an installer can adjust the position of the long rod on the circular ring by sliding the sliding ring, thereby quickly positioning the cable to a required installation position. And when the cable needs to be maintained or replaced, the slip ring slides along the long rod by utilizing the elasticity of the elastic piece II, so that the cable is quickly separated from the mounting part, and a complicated dismounting tool and a tedious operation process are not needed. Compared with a traditional cable installation and maintenance mode, it is ensured that the cable is always stably connected in a complex environment, the reliability of power transmission is guaranteed, faults caused by cable looseness are reduced, and the overall operation stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable device technical field especially relates to an insulation high temperature shielded cable. BACKGROUND

[0002] In the traditional cable installation and fixing process, in the power transmission field, the installation and maintenance work of cable are very important, the high temperature shielded cable is a kind of cable with special performance and structure, mainly used for transmitting signal or electric energy under high temperature environment, and can effectively prevent electromagnetic interference.

[0003] There are many problems. On the one hand, the connection and installation operation of cable and equipment is cumbersome, lacks convenient and quick clamping mode, resulting in low installation efficiency. On the other hand, when fixing the cable, the cable protection layer is easy to fall off due to the too long clamping distance, and the cable is easy to displace in the fixing process, which affects the installation quality and normal use of the cable. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the technical problem in the background art.

[0005] The utility model has the technical scheme that an insulation high temperature shielded cable, including cable body, the cable body includes sheath layer, the inner wall fixed mounting of sheath layer has shielding layer, the inner wall fixed mounting of shielding layer has insulation layer, the inner wall fixed mounting of insulation layer has conductor, the sheath layer is prepared from FEP, and the shielding layer is prepared from tinned copper.

[0006] A fixing structure of insulation high temperature shielded cable, including quick release assembly, the quick release assembly includes circular ring, the outer wall of circular ring is equipped with long pole, the outer wall of long pole is connected with sliding ring, the outer wall of long pole is equipped with elastic piece two, the outer wall of long pole is fixedly installed with fixed plate on one side, the outer wall of long pole is fixedly installed with limit stop on the side away from fixed plate. Here, the quick release assembly is designed ingeniously, and the circular ring cooperates with long pole, sliding ring and the like, the sliding ring can slide on the long pole, and the elastic piece two provides elastic force.

[0007] Preferably, the outer wall of quick release assembly is fixedly installed with protective layer, the inner wall of protective layer is fixedly installed with cable body, the outer wall of protective layer is equipped with elastic piece one, the outer wall of elastic piece one is fixedly installed with clamping plate, and the outer wall of clamping plate is equipped with moving assembly. Here, the protective layer fixed on the outer wall of quick release assembly is prepared from fluoroplastic, and the fluoroplastic has excellent high-temperature resistance, corrosion resistance and insulation performance, further enhancing the protection capability of the whole cable. Two sets of symmetrically installed elastic pieces one and clamping plates can flexibly adjust the clamping force on the cable according to actual installation requirements, and adapt to different installation scenes.

[0008] Preferably, the outer wall of the circular ring is provided with a circular groove, the long rod is slidably connected with the inner wall of the circular ring through the circular groove, and the outer wall of the sliding ring is matched with the inner wall of the circular groove. Here, the long rod is slidably connected with the inner wall of the circular ring through the circular groove, and the outer wall of the sliding ring is matched with the inner wall of the circular groove. This structure makes the connection between the long rod and the circular ring more stable and flexible.

[0009] Preferably, the outer wall of the sliding ring is fixedly installed with the inner wall of the circular groove, one side of the elastic member two is fixedly installed with the inner wall of the sliding ring, the other side of the elastic member two is fixedly installed with the outer wall of the fixed plate, and the outer wall diameter of the fixed plate is matched with the inner wall diameter of the sliding ring. Here, the sliding ring is fixed with the inner wall of the circular groove, one side of the elastic member two is fixed with the inner wall of the sliding ring, the other side is fixed with the outer wall of the fixed plate, and the outer wall diameter of the fixed plate is matched with the inner wall diameter of the sliding ring. This structure makes the elastic member two play a stable buffering and resetting role.

[0010] Preferably, the protective layer is made of fluoroplastic, the number of the elastic member one and the clamping plate is two groups respectively, and the two groups of elastic member one and clamping plate are symmetrically installed on the outer wall of the protective layer. The outer wall of the protective layer is located in the inner wall of the circular ring. Here, the protective layer is made of fluoroplastic, which further strengthens the protection performance of the cable. The two groups of elastic member one and clamping plate are symmetrically installed on the outer wall of the protective layer, and the symmetric structure makes the stress of the cable more uniform.

[0011] Preferably, the moving assembly comprises a square frame, the outer wall of the square frame is slidably connected with a moving block, the inner wall of the moving block is fixedly installed with a circular rod, the outer wall of the circular rod is slidably connected with a sliding plate, the outer wall of the circular rod is sleeved with an elastic member three, the top of the circular rod is fixedly installed with a circular plate, and the outer wall of the moving block is fixedly installed with a connecting piece. Here, the combination of the square frame, the moving block, the circular rod, the sliding plate, the elastic member three, the connecting piece and the circular plate in the moving assembly brings a convenient position adjustment function for cable installation. The square frame provides a sliding track for the moving block, and the moving block can slide flexibly on the outer wall of the square frame to realize the position adjustment of the cable in the horizontal direction.

[0012] Preferably, the outer wall of the sliding plate is in contact with the top of the moving block, the outer wall of the circular rod is slidably connected with the inner wall of the square frame, and one side of the elastic member three is fixedly installed with the outer wall of the sliding plate. Here, the outer wall of the sliding plate is in contact with the top of the moving block, the outer wall of the circular rod is slidably connected with the inner wall of the square frame, and one side of the elastic member three is fixedly installed with the outer wall of the sliding plate. This structure ensures the smoothness of the cooperative work of each part of the moving assembly.

[0013] Preferably, the other side outer wall of the elastic member three is fixedly installed with the outer wall of the circular plate, the number of the moving block, the circular rod, the sliding plate, the elastic member three, the connecting piece and the circular plate is three groups, and the three groups of square frames, moving blocks, circular rods, sliding plates, elastic member threes, connecting pieces and circular plates are arranged on the outer wall of the square frame, and the outer wall of the moving block is fixedly installed with the outer wall of the elastic member one away from the clamping plate. Here, the three groups of square frames, moving blocks, circular rods, sliding plates, elastic member threes, connecting pieces and circular plates are arranged on the outer wall of the square frame, and the outer wall of the moving block is fixedly installed with the outer wall of the elastic member one away from the clamping plate, and the setting of the multiple groups structure greatly increases the flexibility and accuracy of the cable installation position adjustment.

[0014] Compared with the prior art, the utility model has the advantages and positive effects that:

[0015] 1、The utility model discloses a circular ring's outer wall is equipped with the long pole, and the long pole is connected with the sliding ring on the sliding, and the installation personnel can adjust the position of the long pole on the circular ring by sliding the sliding ring, thereby positioning the cable to the required installation position quickly. When it is necessary to maintain or replace the cable, the sliding ring is slid along the long pole by utilizing the elasticity of the elastic member two, so that the cable is quickly separated from the installation part without the need of complicated dismounting tools and tedious operation process. Compared with the traditional cable installation and maintenance mode, the cable can always maintain stable connection in complex environment, the reliability of power transmission is guaranteed, the failure caused by cable loosening is reduced, and the overall operation stability is improved.

[0016] 2、The utility model discloses a symmetrically installed elastic member one and clamping plate on the both sides of the outer wall of the cable protection layer can adjust the initial stretching or compression degree of the elastic member one according to the actual outer diameter of the cable and the installation demand, and determine the appropriate clamping force. At the same time, through the cooperation of the square frame, the sliding plate, the circular rod, the elastic member three and the connecting piece, the position of the connecting piece can be adjusted flexibly, thereby driving the elastic member one and the clamping plate to clamp the protection layer at different positions, avoiding the protection layer from falling off due to improper clamping, and effectively preventing the displacement of the cable during fixing after the position adjustment is completed, improving the stability and reliability of the cable fixing, and guaranteeing the cable installation quality. ACCURACY

[0017] Figure 1 A three-dimensional structure schematic diagram of the insulating high-temperature shielding cable is provided for the utility model;

[0018] Figure 2 Another side structure schematic diagram of the insulating high-temperature shielding cable is provided for the utility model;

[0019] Figure 3 A cross-sectional structure schematic diagram of the insulating high-temperature shielding cable is provided for the utility model;

[0020] Figure 4The utility model provides a kind of quick release assembly schematic diagram of insulating high temperature shielded cable;

[0021] Figure 5 The utility model provides a kind of moving assembly schematic diagram of insulating high temperature shielded cable;

[0022] Figure 6 The utility model provides a kind of insulating high temperature shielded cable Figure 2 Enlarged view in A place;

[0023] Figure 7 The utility model provides a kind of middle shielding layer schematic diagram of insulating high temperature shielded cable.

[0024] Legend:

[0025] 1, quick release assembly;2, protective layer;3, cable body;31, sheath layer;32, shielding layer;33, insulating layer;34, conductor;4, elastic piece one;5, clamping plate;6, moving assembly;

[0026] 101, annular;102, long rod;103, sliding ring;104, elastic piece two;105, fixed plate;106, limit plate;

[0027] 601, square frame;602, moving block;603, round rod;604, sliding plate;605, elastic piece three;606, connecting piece;607, circular plate. Specific embodiments

[0028] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the drawings and examples.It should be noted that the embodiments of the present application and the features in the examples can be combined with each other without conflict.

[0029] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, however, the utility model can also be implemented in other ways different from the description herein, therefore, the utility model is not limited to the specific embodiments disclosed in the following disclosure.

[0030] Example one

[0031] Please refer to Figures 1-7 The utility model provides a kind of technical scheme:A kind of insulating high temperature shielded cable, including cable body 3, cable body 3 includes sheath layer 31, the inner wall of sheath layer 31 is fixedly installed with shielding layer 32, the inner wall of shielding layer 32 is fixedly installed with insulating layer 33, the inner wall of insulating layer 33 is fixedly installed with conductor 34, sheath layer 31 is prepared by FEP, and shielding layer 32 is prepared by tinned copper.

[0032] The utility model provides an insulating high temperature shielding cable's fixed structure, including quick release assembly 1, quick release assembly 1 includes circular ring 101, the outer wall of circular ring 101 is equipped with long pole 102, the outer wall of long pole 102 is slidably connected with sliding ring 103, the outer wall of long pole 102 is equipped with elastic member no. 2 104, the outer wall of long pole 102 one side fixed mounting has fixed plate 105, the outer wall of long pole 102 away from fixed plate 105 one side fixed mounting has stop plate 106, here, quick release assembly 1 design is ingenious, and circular ring 101 cooperates with long pole 102, sliding ring 103 etc., and sliding ring 103 can slide on long pole 102, and elastic member no. 2 104 provides elastic force, and fixed plate 105 and stop plate 106 play the limiting effect, and this structure makes the component can be conveniently disassembled and installed, when needing to maintain, replace parts etc. operation to cable, can quickly realize, improve work efficiency, reduce downtime.

[0033] The outer wall of quick release assembly 1 is fixedly installed with a protective layer 2, the inner wall of the protective layer 2 is fixedly installed with a cable body 3, the outer wall of the protective layer 2 is provided with an elastic member 1 4, the outer wall of the elastic member 1 4 is fixedly installed with a clamping plate 5, and the outer wall of the clamping plate 5 is provided with a moving assembly 6, here, the protective layer 2 fixedly installed on the outer wall of the quick release assembly 1 is made of fluoroplastic, which has excellent high-temperature resistance, corrosion resistance and insulation performance, further enhancing the protection capability of the cable as a whole. Two sets of symmetrically installed elastic members 1 4 and clamping plates 5 can flexibly adjust the clamping force on the cable according to actual installation needs, adapt to different installation scenarios, and effectively buffer the extrusion force on the cable from the outside to avoid damage to the cable due to external force. The setting of the moving assembly 6 provides convenience for the position fine adjustment of the cable during installation, making the cable installation more accurate and efficient.

[0034] The outer wall of the circular ring 101 is provided with a circular groove, the long pole 102 is slidably connected with the inner wall of the circular ring 101 by penetrating the circular groove, and the outer wall of the sliding ring 103 is matched with the inner wall of the circular groove, here, the long pole 102 is slidably connected with the inner wall of the circular ring 101 by penetrating the circular groove, and the outer wall of the sliding ring 103 is matched with the inner wall of the circular groove, which makes the connection between the long pole 102 and the circular ring 101 more stable and flexible. The sliding ring 103 slides in the circular groove, which can realize the angle adjustment of the quick release assembly 1 in different directions, meet the connection requirements of the cable in complex installation environment, and improve the adaptability of the cable installation.

[0035] The outer wall of the sliding ring 103 is fixedly installed with the inner wall of the circular groove, one side of the outer wall of the elastic member two 104 is fixedly installed with the inner wall of the sliding ring 103, the other side of the outer wall of the elastic member two 104 is fixedly installed with the outer wall of the fixed plate 105, and the outer wall diameter of the fixed plate 105 is adapted to the inner wall diameter of the sliding ring 103. Here, the sliding ring 103 is fixed with the inner wall of the circular groove, one side of the elastic member two 104 is fixed with the inner wall of the sliding ring 103, the other side of the elastic member two 104 is fixed with the outer wall of the fixed plate 105, and the outer wall diameter of the fixed plate 105 is adapted to the inner wall diameter of the sliding ring 103. This structure enables the elastic member two 104 to stably play a buffering and resetting role. When the sliding ring 103 is slid under external force, the elastic member two 104 is compressed or stretched, and after the external force disappears, the sliding ring 103 can be quickly reset to the initial position, ensuring that the quick release assembly 1 is always in a normal working state, improving the reliability and durability of the assembly.

[0036] The protective layer 2 is made of fluoroplastic, there are two groups of elastic members one 4 and clamping plates 5 respectively, and the two groups of elastic members one 4 and clamping plates 5 are symmetrically installed on the outer wall of the protective layer 2, and the outer wall of the protective layer 2 is located on the inner wall of the circular ring 101. Here, the protective layer 2 is made of fluoroplastic, which further enhances the protection performance of the cable. The two groups of elastic members one 4 and clamping plates 5 are symmetrically installed on the outer wall of the protective layer 2, and the symmetric structure makes the stress on the cable more uniform, which can better disperse the pressure when clamping the cable and avoid local excessive stress leading to cable damage. The protective layer 2 is fixed with the outer wall of the circular ring 101, which tightly connects the quick release assembly 1 and the cable body 3 together, enhancing the stability of the overall structure of the cable.

[0037] The moving assembly 6 includes a square frame 601, the outer wall of the square frame 601 is slidably connected with a moving block 602, the inner wall of the moving block 602 is fixedly installed with a circular rod 603, the outer wall of the circular rod 603 is slidably connected with a sliding plate 604, the outer wall of the circular rod 603 is sleeved with an elastic member three 605, the top of the circular rod 603 is fixedly installed with a circular plate 607, and the outer wall of the moving block 602 is fixedly installed with a connecting piece 606. Here, the combination design of the square frame 601, the moving block 602, the circular rod 603, the sliding plate 604, the elastic member three 605, the connecting piece 606 and the circular plate 607 in the moving assembly 6 brings convenient position adjustment function for cable installation. The square frame 601 provides a sliding track for the moving block 602, the moving block 602 can flexibly slide on the outer wall of the square frame 601, realizing the position adjustment of the cable in the horizontal direction. The setting of the circular rod 603, the sliding plate 604 and the elastic member three 605 enables the cable to also be fine-tuned in the vertical direction, the elastic member three 605 plays a buffering and resetting role, ensuring a smooth and accurate adjustment process. The connecting piece 606 is used to connect other installation components, which is convenient for connection with the fixed structure in the installation environment.

[0038] The outer wall of the sliding plate 604 is in contact with the top of the moving block 602, the outer wall of the round rod 603 is in sliding connection with the inner wall of the square frame 601, and one side of the outer wall of the elastic member three 605 is fixedly installed with the outer wall of the sliding plate 604. Here, the outer wall of the sliding plate 604 is in contact with the top of the moving block 602, the outer wall of the round rod 603 is in sliding connection with the inner wall of the square frame 601, and one side of the outer wall of the elastic member three 605 is fixedly installed with the outer wall of the sliding plate 604. The structure ensures the smoothness of the cooperation of the parts of the moving assembly 6. When the cable is adjusted in the vertical direction, the sliding plate 604 slides on the round rod 603, and the elastic member three 605 is compressed or stretched, thereby providing a buffer force for the adjustment process, avoiding damage to the cable caused by excessive adjustment amplitude, and making the adjustment operation more sensitive and accurate.

[0039] The other side of the outer wall of the elastic member three 605 is fixedly installed with the outer wall of the circular plate 607, there are three groups of moving blocks 602, round rods 603, sliding plates 604, elastic members three 605, connecting members 606 and circular plates 607, and the three groups of square frames 601, moving blocks 602, round rods 603, sliding plates 604, elastic members three 605, connecting members 606 and circular plates 607 are arranged on the outer wall of the square frame 601, and the outer wall of the moving block 602 is fixedly installed with the outer wall of the elastic member one 4 away from the clamping plate 5. Here, the three groups of square frames 601, moving blocks 602, round rods 603, sliding plates 604, elastic members three 605, connecting members 606 and circular plates 607 are arranged on the outer wall of the square frame 601, and the outer wall of the moving block 602 is fixedly installed with the outer wall of the elastic member one 4 away from the clamping plate 5. The arrangement of the multiple groups greatly increases the flexibility and accuracy of the adjustment of the cable installation position. The moving blocks 602 at different positions can independently slide on the respective square frames 601, thereby realizing fine adjustment of the cable in multiple directions and multiple positions, meeting the stringent requirements for the cable installation position in complex installation environments, and improving the efficiency and quality of the cable installation.

[0040] Working principle: the ring 101 is sleeved on the cable body 3 near the end to be installed, at this time, the long rod 102 is pulled to slide in the inner wall of the ring 101, so that the long rod 102 slides in the inner wall of the sliding ring 103, and the fixed plate 105 drives the elastic member two 104 to be compressed, at this time, the fixed plate 105 can enter the inner wall of the sliding ring 103, and the ring 101 can be fixed with the device to be installed, when the device is clamped, at this time, the limiting plate 106 is loosened, so that the limiting plate 106 drives the long rod 102 to slide in the inner wall of the sliding ring 103, at this time, the long rod 102 drives the fixed plate 105 to contact the outer wall of the device, so that the elastic member two 104 restores the elastic force, so that the fixed plate 105 can quickly clamp the device, at this time, the assembly of the quick release assembly 1 is completed, the two groups of symmetric elastic members one 4 and clamping plates 5 are respectively installed on the outer wall of the protection layer 2 on both sides, the initial stretching or compression degree of the elastic member one 4 can be appropriately adjusted according to the actual outer diameter of the cable and the installation demand, so as to determine the appropriate clamping force, the square frame 601 is installed at the position where the cable needs to be fixed, at this time, the sliding plate 604 is pulled, so that the sliding plate 604 can slide on the outer wall of the circular rod 603, when the position of the clamped cable needs to be adjusted, at this time, the sliding plate 604 is pulled to the direction of the circular plate 607, so that the sliding plate 604 drives the elastic member three 605 to be compressed, at this time, there is a certain space between the sliding plate 604 and the moving block 602, at this time, the connecting piece 606 can be manually pushed, so as to push the connecting piece 606 to slide on the outer wall of the square frame 601, so as to adjust the position of the connecting piece 606, so that the connecting piece 606 drives the elastic member one 4 and the clamping plate 5 to clamp the protection layer 2 at different positions, so as to avoid that the clamping is too long for a distance, so as to cause the protection layer 2 to fall off, when the position adjustment is completed, the sliding plate 604 is loosened, so that the sliding plate 604 recontacts the top of the square frame 601, at this time, the elastic member three 605 restores the elastic force, and the elastic member three 605 abuts against the outer wall of the sliding plate 604, so as to avoid that the protection layer 2 is displaced when being fixed.

[0041] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still belongs to the protection scope of the technical scheme of the present application.

Claims

1. An insulated high-temperature shielded cable, comprising a cable body (3), characterized in that: The cable body (3) includes a sheath layer (31), a shielding layer (32) is fixedly installed on the inner wall of the sheath layer (31), an insulation layer (33) is fixedly installed on the inner wall of the shielding layer (32), and a conductor (34) is fixedly installed on the inner wall of the insulation layer (33). The sheath layer (31) is made of FEP, and the shielding layer (32) is made of tin-plated copper.

2. A fixing structure for an insulated high-temperature shielded cable, employing the insulated high-temperature shielded cable as described in claim 1, comprising a quick-release assembly (1), characterized in that: The quick-release assembly (1) includes a ring (101), the outer wall of the ring (101) is provided with a long rod (102), the outer wall of the long rod (102) is slidably connected with a slip ring (103), the outer wall of the long rod (102) is sleeved with an elastic element (104), a fixing plate (105) is fixedly installed on one side of the outer wall of the long rod (102), and a limit plate (106) is fixedly installed on the outer wall of the long rod (102) away from the fixing plate (105).

3. The fixing structure for an insulated high-temperature shielded cable according to claim 2, characterized in that: The outer wall of the quick-release assembly (1) is fixedly installed with a protective layer (2), the inner wall of the protective layer (2) is fixedly installed with a cable body (3), the outer wall of the protective layer (2) is provided with an elastic element (4), the outer wall of the elastic element (4) is fixedly installed with a clamping plate (5), and the outer wall of the clamping plate (5) is provided with a moving component (6).

4. The fixing structure for an insulated high-temperature shielded cable according to claim 2, characterized in that: The outer wall of the ring (101) is provided with a circular groove, the long rod (102) passes through the circular groove and is slidably connected to the inner wall of the ring (101), and the outer wall of the sliding ring (103) is adapted to the inner wall of the circular groove.

5. The fixing structure for an insulated high-temperature shielded cable according to claim 4, characterized in that: The outer wall of the slip ring (103) is fixedly installed with the inner wall of the circular groove. One side of the outer wall of the elastic element (104) is fixedly installed with the inner wall of the slip ring (103). The other side of the outer wall of the elastic element (104) is fixedly installed with the outer wall of the fixing plate (105). The outer diameter of the fixing plate (105) is adapted to the inner diameter of the slip ring (103).

6. The fixing structure for an insulated high-temperature shielded cable according to claim 3, characterized in that: The protective layer (2) is made of fluoroplastic. There are two sets of elastic element (4) and clamping plate (5), and the two sets of elastic element (4) and clamping plate (5) are symmetrically installed on the outer wall of the protective layer (2). The outer wall of the protective layer (2) is located on the inner wall of the ring (101).

7. The fixing structure for an insulated high-temperature shielded cable according to claim 3, characterized in that: The movable component (6) includes a square frame (601), a movable block (602) is slidably connected to the outer wall of the square frame (601), a round rod (603) is fixedly installed on the inner wall of the movable block (602), a sliding plate (604) is slidably connected to the outer wall of the round rod (603), an elastic element (605) is sleeved on the outer wall of the round rod (603), a circular plate (607) is fixedly installed on the top of the round rod (603), and a connector (606) is fixedly installed on the outer wall of the movable block (602).

8. The fixing structure for an insulated high-temperature shielded cable according to claim 7, characterized in that: The outer wall of the slide plate (604) is in contact with the top of the moving block (602), the outer wall of the round rod (603) is slidably connected to the inner wall of the square frame (601), and one side of the outer wall of the elastic element three (605) is fixedly installed to the outer wall of the slide plate (604).

9. The fixing structure for an insulated high-temperature shielded cable according to claim 8, characterized in that: The outer wall of the third elastic element (605) is fixedly installed on the outer wall of the circular plate (607). There are three sets of each of the moving block (602), round rod (603), sliding plate (604), third elastic element (605), connecting piece (606) and circular plate (607). The three sets of square frame (601), moving block (602), round rod (603), sliding plate (604), third elastic element (605), connecting piece (606) and circular plate (607) are all set on the outer wall of the square frame (601). The outer wall of the moving block (602) is fixedly installed on the outer wall of the first elastic element (4) away from the clamping plate (5).

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