A cable connection protection device

Abstract

A kind of cable connection protection device, including connecting box and the first return buffer mechanism and the second return buffer mechanism symmetrically arranged in connecting box;First return buffer mechanism and the second return buffer mechanism all include positioning ring, support column and return spring, support column is arranged in positioning ring, return spring is sleeved on support column, one end of return spring is fixed on support column, the other end is fixed on positioning ring;Two support columns are movably connected with connecting box;The connection of cable is located in the region between two support columns;In application, two cables are wound on two support columns respectively, then the connection is placed between two support columns, when cable is pulled, pulling force will first act on support column, then drive return spring to produce deformation, so that pulling force will not directly act on cable connection, reduce the risk of cable connection breakage.Therefore, the design is not only more convenient to disassemble and assemble, but also has higher stability.

Description

TECHNICAL FIELD

[0001] The present application relates to a connection protection device, belonging to the field of electrical engineering, in particular to a cable connection protection device. BACKGROUND

[0002] The cable connector is mainly suitable for signal transmission between internal connection of digital program-controlled switch of transmission equipment bureau and distribution frame, and is used for transmitting data, audio, video and other communication equipment. The cable usually consists of several or several groups of wires, and the cable connector is used for connecting the cable. When using the cable connector, the connector needs to be disassembled first, then the cable end is pressed tightly, and the connector is assembled, sometimes special tools are needed to complete it.

[0003] The cable protection device of the optical fiber communication cable provided in the Chinese patent with the application number 201921373435.5 and the application date of August 22, 2019 provides a concept of protecting the connection of the cable, which includes a mounting box, two stretching mechanisms are arranged in the mounting box, the stretching mechanism includes a moving plate, the moving plate is slidably connected with the inner wall of the mounting box, a spring is fixedly installed on one side of the moving plate, the side of the spring away from the moving plate is fixedly connected with the inner wall of one side of the mounting box, a fixing mechanism is arranged on the side of the moving plate away from the spring, the fixing mechanism includes a fixing block, the fixing block is fixedly connected with the moving plate, an installation cavity is formed in the fixing block, two arc-shaped blocks are slidably installed in the installation cavity, a lead screw is fixedly installed on the end of each of the two arc-shaped blocks away from each other, although the structure can provide protection for the connection to some extent, but the structure cannot well buffer the pulling force, when the cable is pulled, the spring is pulled by the cable itself, the force is directly transmitted to the connection, and the cable and the inner shell are hard connected, and the pulling force cannot be buffered.

[0004] Therefore, although the cable can be protected in the prior art, it still has the following defects:

[0005] Since the position of the connector is hard connected with the cable, when the cable is subjected to a pulling force, the position of the cable connection is prone to breakage, which needs to be frequently checked and repaired, and the stability is low, and the cable connector structure is relatively complex, which is not convenient to disassemble and assemble during maintenance.

[0006] The information disclosed in this background section is intended only to enhance understanding of the overall background and does not necessarily constitute an admission that the information forms the prior art that was known to those of ordinary skill in the art. SUMMARY

[0007] The cable connection protection device has high stability and is convenient to disassemble.

[0008] To achieve the above object, the technical solution of the present application is: a cable connection protection device, which comprises a connecting box and first and second return force buffering mechanisms symmetrically arranged in the connecting box.

[0009] The first return force buffering mechanism comprises a first positioning ring, a first supporting column and a first return spring, the first supporting column is arranged in the first positioning ring, the first return spring is sleeved on the first supporting column, one end of the first return spring is fixed on the first supporting column, and the other end of the first return spring is fixed on the first positioning ring.

[0010] The second return force buffering mechanism comprises a second positioning ring, a second supporting column and a second return spring, the second supporting column is arranged in the second positioning ring, the second return spring is sleeved on the second supporting column, one end of the second return spring is fixed on the second supporting column, and the other end of the first return spring is fixed on the second positioning ring.

[0011] The first supporting column, the second supporting column and the connecting box are movably connected.

[0012] The first supporting column is wound with a first cable, the second supporting column is wound with a second cable, one end of the first cable is connected with one end of the second cable, and the connection position is located in the region between the first supporting column and the second supporting column.

[0013] The first return force buffering mechanism is provided with a first limiting mechanism on the outer side, the second return force buffering mechanism is provided with a fourth limiting mechanism on the outer side, and the first limiting mechanism and the fourth limiting mechanism are identical in structure.

[0014] The first limiting mechanism comprises a supporting frame, an air pump and a sleeve, one end of the supporting frame is fixed on the side wall of the first positioning ring, the air pump is fixedly connected below the supporting frame, the sleeve is fixedly connected above the supporting frame, and an air bag is sleeved in the sleeve, one end of a connecting pipe is connected to the air pump, and the other end of the connecting pipe penetrates through the pipe wall of the sleeve and communicates with the air bag.

[0015] The outer wall of the sleeve is fixedly connected with a support, the support comprises a first support wall and a second support wall, a rotating shaft is arranged between the first support wall and the second support wall, a rotating wheel is sleeved on the rotating shaft, and one end of the rotating wheel penetrates through the sleeve and abuts against the first cable.

[0016] The inner side of the first back force buffering mechanism is provided with a second limiting mechanism; the inner side of the second back force buffering mechanism is provided with a third limiting mechanism; the second limiting mechanism, the third limiting mechanism and the first limiting mechanism are consistent in structure.

[0017] The connection position of the first cable and the second cable is located in the region between the second limiting mechanism and the third limiting mechanism.

[0018] The air bag is a cylindrical annular air bag, and the air bag is wrapped outside the first cable.

[0019] The connecting box comprises an upper top plate, a lower top plate, a left vertical plate, a right vertical plate, a front vertical plate and a rear vertical plate; the upper top plate, the lower top plate, the left vertical plate, the right vertical plate, the front vertical plate and the rear vertical plate enclose a box cavity; the left vertical plate is provided with a left perforation, and the right vertical plate is provided with a right perforation.

[0020] One end of the first cable sequentially passes through the left perforation, the first limiting mechanism, is partially wound on the first supporting column and then extends to the box cavity by penetrating the second limiting mechanism; one end of the second cable sequentially passes through the right perforation, the fourth limiting mechanism, is partially wound on the second supporting column and then extends to the box cavity by penetrating the third limiting mechanism.

[0021] The first positioning ring and the second positioning ring are fixed on the rear vertical plate, and the first supporting column and the second supporting column are movably connected to the rear vertical plate.

[0022] The front vertical plate is movably arranged between the upper top plate, the lower top plate, the left vertical plate and the right vertical plate.

[0023] The front vertical plate is provided with at least one locking mechanism.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] 1. In the cable connection protection device, the first return force buffering mechanism and the second return force buffering mechanism are symmetrically arranged in the connection box; the first return force buffering mechanism and the second return force buffering mechanism each include a positioning ring, a support column and a return spring; the support column is arranged in the positioning ring, the return spring is sleeved on the support column, one end of the return spring is fixed on the support column, and the other end is fixed on the positioning ring; the first support column and the second support column are movably connected with the connection box; the support columns are each wound with a cable, and the connection of the two cables is located in the area between the two support columns; in application, the two cables are wound on the two support columns, and then the connection is placed between the two support columns, and the cable connection work can be completed, and the connection is more convenient; when the cable is pulled, the pulling force first acts on the support column, the support column drives the return spring to deform, and the pulling force is buffered by the elastic force of the return spring, so that the pulling force does not directly act on the cable connection, the risk of breaking of the cable connection is reduced, and the stability of the protection device is improved. Therefore, the present application is not only convenient to disassemble, but also has high stability.

[0026] 2. In the cable connection protection device, the outside of the first return force buffering mechanism is provided with a first limiting mechanism; the outside of the second return force buffering mechanism is provided with a fourth limiting mechanism; the first limiting mechanism and the fourth limiting mechanism are identical in structure; the first limiting mechanism includes a support frame, an air pump and a sleeve, one end of the support frame is fixed on the side wall of the first positioning ring; the air pump is fixedly connected below the support frame, the sleeve is fixedly connected above the support frame, and the air bag is sleeved in the sleeve; one end of the connecting pipe is connected to the air pump, and the other end of the connecting pipe penetrates through the pipe wall of the sleeve and communicates with the air bag; the support frame includes a first support wall and a second support wall, a rotating shaft is arranged between the first support wall and the second support wall, and a rotating wheel is sleeved on the rotating shaft; one end of the rotating wheel penetrates through the sleeve and abuts on the first cable; in application, when subjected to a pulling force, the rotating wheel on the support frame is driven to rotate by the cable, at this time the air pump starts to inflate the air bag, the air bag expands rapidly, the cable is prevented from being pulled further by friction force, so as to fix the cable and avoid stress on the cable connection, and the return spring is cooperated with the air bag to further reduce the risk of breaking of the cable connection. Therefore, the present application can reduce the risk of cable breaking, and improve the stability of the protection device.

[0027] 3、The cable connection protection device, the inner side of the first return buffer mechanism is provided with a second limiting mechanism, the inner side of the second return buffer mechanism is provided with a third limiting mechanism; the second limiting mechanism, the third limiting mechanism and the structure of the first limiting mechanism are identical; the connection of the first cable and the second cable is located in the region between the second limiting mechanism and the third limiting mechanism; the design is applied, the inner and outer sides of the first return buffer mechanism and the inner and outer sides of the second return buffer mechanism are provided with limiting mechanisms, when the cable is subjected to the pulling force, the limiting mechanism on the outer side is fixed to the cable first, then the return buffer mechanism is buffered, and finally the limiting mechanism on the inner side is fixed again, thereby greatly reducing the stress of the cable connection, and avoiding the fracture of the connection. Therefore, the stability of the protection device is further improved.

[0028] 4、The cable connection protection device, the connecting box comprises an upper top plate, a lower top plate, a left stand plate, a right stand plate, a front stand plate and a rear stand plate, the front stand plate is movably arranged between the upper top plate, the lower top plate, the left stand plate and the right stand plate, and at least one locking mechanism is arranged on the front stand plate; the design is applied, the front stand plate does not need to be disassembled and assembled by special tools, and the cable connection can be carried out after the front stand plate is disassembled, and the operation is more convenient. Therefore, the stability of the protection device is higher, and the disassembly and assembly are more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the structural schematic diagram of the application.

[0030] Figure 2 It is the structural schematic diagram of the first return buffer mechanism and the second return buffer mechanism in the application.

[0031] Figure 3 It is the structural schematic diagram of the limiting mechanism in the application.

[0032] Figure 4 It is the structural schematic diagram of the sleeve in the application.

[0033] Figure 5 It is the side view of the connecting box in the application.

[0034] Figure 6 It is the side view of example 5 in the application.

[0035] Figure 7 It is the sectional view of example 5 in the application.

[0036] In the figure: connecting box 1, upper top plate 101, lower top plate 102, left vertical plate 103, right vertical plate 104, front vertical plate 105, rear vertical plate 106, box cavity 107, left perforation 108, right perforation 109, first return buffer mechanism 2, first positioning ring 201, first support column 202, first return spring 203, first cable 204, second return buffer mechanism 3, second positioning ring 301, second support column 302, second return spring 303, second cable 304, first limiting mechanism 4, support frame 401, air pump 402, sleeve 403, air bag 404, support 405, rotating shaft 406, rotating wheel 407, connecting pipe 408, first support wall 409, second support wall 410, second limiting mechanism 5, third limiting mechanism 6, fourth limiting mechanism 7, locking mechanism 8, handle 81, connecting shaft 82, clamping plate 83, groove 84. DETAILED DESCRIPTION

[0037] The application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figure 1 — Figure 7 A cable connection protection device, the protection device comprises a connecting box 1 and a first return buffer mechanism 2 and a second return buffer mechanism 3 symmetrically arranged in the connecting box 1;

[0039] The first return buffer mechanism 2 comprises a first positioning ring 201, a first support column 202 and a first return spring 203, the first support column 202 is arranged in the first positioning ring 201, the first return spring 203 is sleeved on the first support column 202, one end of the first return spring 203 is fixed on the first support column 202, and the other end of the first return spring 203 is fixed on the first positioning ring 201;

[0040] The second return buffer mechanism 3 comprises a second positioning ring 301, a second support column 302 and a second return spring 303, the second support column 302 is arranged in the second positioning ring 301, the second return spring 303 is sleeved on the second support column 302, one end of the second return spring 303 is fixed on the second support column 302, and the other end of the first return spring 203 is fixed on the second positioning ring 301;

[0041] The first support column 202 and the second support column 302 are movably connected with the connecting box 1;

[0042] The first support column 202 is wound with a first cable 204, the second support column 302 is wound with a second cable 304, one end of the first cable 204 and one end of the second cable 304 are connected with each other, and the connection position is located in the region between the first support column 202 and the second support column 302.

[0043] The outer side of the first return force buffering mechanism 2 is provided with a first limiting mechanism 4; the outer side of the second return force buffering mechanism 3 is provided with a fourth limiting mechanism 7; the first limiting mechanism 4 and the fourth limiting mechanism 7 are consistent in structure;

[0044] The first limiting mechanism 4 comprises a support frame 401, an air pump 402 and a sleeve 403, one end of the support frame 401 is fixed on the side wall of the first positioning ring 201; the lower side of the support frame 401 is fixedly connected with the air pump 402, the upper side of the support frame 401 is fixedly connected with the sleeve 403, the inner sleeve of the sleeve 403 is provided with an air bag 404; one end of the connecting pipe 408 connected with the air pump 402, the other end of the connecting pipe 408 penetrates through the pipe wall of the sleeve 403 and is connected with the air bag 404 in communication;

[0045] The outer wall of the sleeve 403 is fixedly connected with a support 405, the support 405 comprises a first support wall 409 and a second support wall 410, a rotating shaft 406 is arranged between the first support wall 409 and the second support wall 410, a rotating wheel 407 is sleeved on the rotating shaft 406; one end of the rotating wheel 407 penetrates through the sleeve 403 and the air bag 404 and abuts on the first cable 204.

[0046] The inner side of the first return force buffering mechanism 2 is provided with a second limiting mechanism 5; the inner side of the second return force buffering mechanism 3 is provided with a third limiting mechanism 6; the second limiting mechanism 5, the third limiting mechanism 6 and the first limiting mechanism 4 are consistent in structure.

[0047] The connection between the first cable 204 and the second cable 304 is located in the region between the second limiting mechanism 5 and the third limiting mechanism 6.

[0048] The air bag 404 is a cylindrical annular air bag, and the air bag 404 is wrapped outside the first cable 204.

[0049] The connection box 1 comprises an upper top plate 101, a lower top plate 102, a left vertical plate 103, a right vertical plate 104, a front vertical plate 105 and a rear vertical plate 106; the upper top plate 101, the lower top plate 102, the left vertical plate 103, the right vertical plate 104, the front vertical plate 105 and the rear vertical plate 106 form a box cavity 107; the left vertical plate 103 is provided with a left perforation 108, and the right vertical plate 104 is provided with a right perforation 109.

[0050] One end of the first cable 204 extends into the box cavity 107 after sequentially passing through the left perforation 108, the first limiting mechanism 4, partially winding on the first support column 202, and penetrating the second limiting mechanism 5; one end of the second cable 304 extends into the box cavity 107 after sequentially passing through the right perforation 109, the fourth limiting mechanism 7, partially winding on the second support column 302, and penetrating the third limiting mechanism 6.

[0051] The first positioning ring 201 and the second positioning ring 301 are fixed on the rear vertical plate 106, and the first support column 202 and the second support column 302 are movably connected to the rear vertical plate 106.

[0052] The front vertical plate 105 is movably arranged between the upper top plate 101, the lower top plate 102, the left vertical plate 103 and the right vertical plate 104.

[0053] At least one locking mechanism 8 is arranged on the front vertical plate 105.

[0054] The principle of the present application is as follows:

[0055] The support column is arranged to facilitate winding of the cable, the elastic return spring is arranged to provide a buffer force to the cable when the cable is pulled to prevent the connection of the cable from being broken, thereby protecting the connection of the cable, the rotating wheel is driven to rotate when the cable is pulled to automatically control the air pump, the air bag is used to clamp and position the cable, thereby strengthening the protection of the connection of the cable, preventing the connection of the cable from being broken, avoiding repeated disassembly and assembly of the connection box, and improving the stability of the connection of the protection device.

[0056] Embodiment 1:

[0057] Referring to Figure 1 — Figure 7A cable connection protection device, the protection device comprises a connection box 1 and a first return force buffering mechanism 2 and a second return force buffering mechanism 3 symmetrically arranged in the connection box 1; the first return force buffering mechanism 2 comprises a first positioning ring 201, a first supporting column 202 and a first return force spring 203, the first supporting column 202 is arranged in the first positioning ring 201, the first return force spring 203 is sleeved on the first supporting column 202, one end of the first return force spring 203 is fixed on the first supporting column 202, and the other end of the first return force spring 203 is fixed on the first positioning ring 201; the second return force buffering mechanism 3 comprises a second positioning ring 301, a second supporting column 302 and a second return force spring 303, the second supporting column 302 is arranged in the second positioning ring 301, the second return force spring 303 is sleeved on the second supporting column 302, one end of the second return force spring 303 is fixed on the second supporting column 302, and the other end of the first return force spring 203 is fixed on the second positioning ring 301; the first supporting column 202, the second supporting column 302 and the connection box 1 are movably connected; a first cable 204 is wound on the first supporting column 202, a second cable 304 is wound on the second supporting column 302, and one end of the first cable 204 and one end of the second cable 304 are connected to each other, and the connection position is located in the region between the first supporting column 202 and the second supporting column 302.

[0058] In application, the first cable 204 is arranged in the connection box 1 and wound on the first supporting column 202, the second cable 304 is arranged in the connection box 1 and wound on the second supporting column 302, then the first cable 204 and the second cable 304 are connected to each other, and the connection position is located in the region between the first supporting column 202 and the second supporting column 302. After installation, if the cable is pulled by external force, the pulling force of the cable will drive the supporting column to rotate, and the supporting column will make the return force spring deform. Due to the elastic property of the return force spring, the pulling force will be buffered and will not directly act on the connection position of the cable. Whether the cable is pulled on one side or both sides, at least one return force buffering mechanism will be in action, thereby protecting the connection position of the cable.

[0059] Embodiment 2:

[0060] The basic content is the same as that of embodiment 1, and the difference is that:

[0061] The outer side of the first back force buffering mechanism 2 is provided with a first limiting mechanism 4; the outer side of the second back force buffering mechanism 3 is provided with a fourth limiting mechanism 7; the first limiting mechanism 4 is consistent in structure with the fourth limiting mechanism 7; the first limiting mechanism 4 comprises a support frame 401, an air pump 402 and a sleeve 403, one end of the support frame 401 is fixed on the side wall of the first positioning ring 201; the air pump 402 is fixedly connected below the support frame 401, the sleeve 403 is fixedly connected above the support frame 401, and the inner sleeve of the sleeve 403 is provided with an air bag 404; one end of the connecting pipe 408 connected with the air pump 402 penetrates through the pipe wall of the sleeve 403 and communicates with the air bag 404; the outer wall of the sleeve 403 is fixedly connected with a support 405, the support 405 comprises a first support wall 409 and a second support wall 410, a rotating shaft 406 is penetrated between the first support wall 409 and the second support wall 410, and a rotating wheel 407 is sleeved on the rotating shaft 406; one end of the rotating wheel 407 penetrates through the sleeve 403 and the air bag 404 and abuts on the first cable 204, preferably the air bag 404 is a columnar annular air bag, and the air bag 404 wraps the first cable 204.

[0062] In application, when the cable is pulled, the rotating wheel abutting on the cable is driven to rotate, so that the air pump is immediately started to inflate the air bag, the air bag is in close contact with the cable after expansion, the friction force provided by the air bag locks and fixes the cable, prevents the cable from being continuously pulled, and when the friction force provided by the air bag is insufficient to overcome the pulling force, the cable will not be pulled off, but the subsequent back force buffering mechanism buffers the pulling force, further reducing the stress risk of the cable connection.

[0063] Embodiment 3:

[0064] The basic content is the same as that of embodiment 2, except that:

[0065] The inner side of the first back force buffering mechanism 2 is provided with a second limiting mechanism 5; the inner side of the second back force buffering mechanism 3 is provided with a third limiting mechanism 6; the second limiting mechanism 5 and the third limiting mechanism 6 are consistent in structure with the first limiting mechanism 4.

[0066] In application, the inner and outer sides of the back force buffering mechanism are provided with limiting mechanisms, so that when the first limiting mechanism 4 and the fourth limiting mechanism 7 on the outer side are insufficient to fasten the cable, and the buffering of the first back force buffering mechanism 2 and the second back force buffering mechanism 3 is insufficient, causing the pulling force to continue to transmit to the cable connection, the second limiting mechanism 5 and the third limiting mechanism 6 on the inner side will also be started, so as to further fasten the cable and further protect the cable connection.

[0067] Embodiment 4:

[0068] The basic content is the same as that of Example 3, except that:

[0069] The air bag 404 is a cylindrical annular air bag, which is wrapped outside the first cable 204. Preferably, other structures capable of providing non-rigid fastening for the cable can also be applied to the present application.

[0070] Example 5:

[0071] The basic content is the same as that of Example 1, except that:

[0072] Referring to Figure 6 — Figure 7 The front vertical plate 105 is provided with at least one locking mechanism 8; preferably, the locking mechanism 8 comprises a handle 81, a connecting shaft 82 and a clamping plate 83, the handle 81 is located on the outside of the front vertical plate 105, the handle 81 is fixedly connected with one end of the connecting shaft 82, the other end of the connecting shaft 82 extends into the box cavity 107 through the front vertical plate 105, and the other end of the connecting shaft 82 is fixedly connected with the clamping plate 83; the clamping plate 83 is a round plate with protrusions at both ends, and the bottom surface of the upper top plate 101 and the top surface of the lower top plate 102 are both provided with grooves 84 corresponding to the protrusions of the clamping plate 83.

[0073] In application, when the front vertical plate 105 needs to be disassembled or installed, the handle 81 is rotated to rotate the protrusions of the clamping plate 83 out of or into the grooves 84, so that the disassembly and fixation of the front vertical plate 105 can be completed, and the disassembly and assembly are relatively convenient.

[0074] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above embodiments, but any equivalent modifications or changes made by those skilled in the art according to the disclosed content of the present application shall be included in the protection scope recorded in the claims.

Claims

1. A cable connection protection device, characterized by: The protection device comprises a connecting box (1) and a first return force buffering mechanism (2) and a second return force buffering mechanism (3) symmetrically arranged in the connecting box (1); The first return force buffering mechanism (2) comprises a first positioning ring (201), a first supporting column (202) and a first return force spring (203), the first supporting column (202) is arranged in the first positioning ring (201), the first return force spring (203) is sleeved on the first supporting column (202), one end of the first return force spring (203) is fixed on the first supporting column (202), and the other end of the first return force spring (203) is fixed on the first positioning ring (201); The second return force buffering mechanism (3) comprises a second positioning ring (301), a second supporting column (302) and a second return force spring (303), the second supporting column (302) is arranged in the second positioning ring (301), the second return force spring (303) is sleeved on the second supporting column (302), one end of the second return force spring (303) is fixed on the second supporting column (302), and the other end of the second return force spring (303) is fixed on the second positioning ring (301); The first supporting column (202), the second supporting column (302) and the connecting box (1) are movably connected; The first supporting column (202) is wound with a first cable (204), the second supporting column (302) is wound with a second cable (304), one end of the first cable (204) and one end of the second cable (304) are connected to each other, and the connection position is located in a region between the first supporting column (202) and the second supporting column (302); The outer side of the first return force buffering mechanism (2) is provided with a first limiting mechanism (4), the outer side of the second return force buffering mechanism (3) is provided with a fourth limiting mechanism (7), and the first limiting mechanism (4) and the fourth limiting mechanism (7) are identical in structure; The first limiting mechanism (4) comprises a supporting frame (401), an air pump (402) and a sleeve (403), one end of the supporting frame (401) is fixed on the side wall of the first positioning ring (201), the air pump (402) is fixedly connected below the supporting frame (401), the sleeve (403) is fixedly connected above the supporting frame (401), and the air bag (404) is sleeved in the sleeve (403); one end of the connecting pipe (408) is connected to the air pump (402), and the other end of the connecting pipe (408) penetrates through the pipe wall of the sleeve (403) and communicates with the air bag (404); The outer wall of the sleeve (403) is fixedly connected with a support (405), the support (405) comprises a first supporting wall (409) and a second supporting wall (410), a rotating shaft (406) is arranged between the first supporting wall (409) and the second supporting wall (410), and a rotating wheel (407) is sleeved on the rotating shaft (406); one end of the rotating wheel (407) penetrates through the sleeve (403) and abuts against the first cable (204). When the first cable (204) is pulled, the rotating wheel (407) abutting on the first cable (204) is rotated, so that the air pump (402) is started immediately to inflate the air bag (404), the air bag (404) is in close contact with the first cable (204) after inflation, and the friction force provided by the air bag (404) locks and fixes the first cable (204); The inner side of the first return force buffering mechanism (2) is provided with a second limiting mechanism (5); the inner side of the second return force buffering mechanism (3) is provided with a third limiting mechanism (6); the second limiting mechanism (5) and the third limiting mechanism (6) are consistent with the structure of the first limiting mechanism (4); When the first limiting mechanism (4) and the fourth limiting mechanism (7) are insufficient to fasten the cable, and the buffering of the first return force buffering mechanism (2) and the second return force buffering mechanism (3) is insufficient, so that the pulling force continues to be transmitted to the cable connection, the second limiting mechanism (5) and the third limiting mechanism (6) are started; The air bag (404) is a cylindrical annular air bag, and the air bag (404) is wrapped outside the first cable (204).

2. A cable connection protection device according to claim 1, characterized in that: The connection between the first cable (204) and the second cable (304) is located in the area between the second limiting mechanism (5) and the third limiting mechanism (6).

3. The cable connection protection device according to claim 2, characterized in that: The connection box (1) comprises an upper top plate (101), a lower top plate (102), a left vertical plate (103), a right vertical plate (104), a front vertical plate (105) and a rear vertical plate (106); the upper top plate (101), the lower top plate (102), the left vertical plate (103), the right vertical plate (104), the front vertical plate (105) and the rear vertical plate (106) form a box cavity (107); the left vertical plate (103) is provided with a left through hole (108), and the right vertical plate (104) is provided with a right through hole (109).

4. The cable connection protection device according to claim 3, characterized in that: One end of the first cable (204) sequentially passes through the left through hole (108), the first limiting mechanism (4), is partially wound on the first supporting column (202), and then penetrates the second limiting mechanism (5) and extends into the box cavity (107); one end of the second cable (304) sequentially passes through the right through hole (109), the fourth limiting mechanism (7), is partially wound on the second supporting column (302), and then penetrates the third limiting mechanism (6) and extends into the box cavity (107).

5. The cable connection protection device according to claim 4, characterized in that: The first positioning ring (201) and the second positioning ring (301) are fixed on the rear vertical plate (106), and the first supporting column (202) and the second supporting column (302) are movably connected to the rear vertical plate (106).

6. The cable connection protection device according to claim 5, characterized in that: The front vertical plate (105) is movably arranged between the upper top plate (101), the lower top plate (102), the left vertical plate (103) and the right vertical plate (104).

7. A cable connection protection device according to claim 3, characterized in that: At least one locking mechanism (8) is arranged on the front vertical plate (105).

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