Cable anti-theft device

Abstract

The utility model discloses a cable anti-theft device, which relates to the technical field of cable protection and comprises a protection box, a box door is rotatably arranged on one side of the protection box, a plurality of threading holes are arranged on two sides in the protection box, and sealing plates are tightly attached to the positions, corresponding to the threading holes, of the inner side of the protection box. Supporting sliding plates on the two sides of the protection box are arranged on guide frames in a sliding mode, the two ends of the two guide frames are fixedly arranged at the two ends of two fixing plates respectively, first reset springs are fixedly arranged between the upper ends of adjusting bottom plates on the guide frames and the bottom ends of the supporting sliding plates, and an alarm is fixedly arranged in a mounting hole in the upper end of one fixing plate. According to the utility model, the plurality of sliding clamping blocks are arranged, so that when the box door is closed, the cable can be clamped and fixed, and the cable in the protection box can be prevented from being pulled from the outside, thereby reducing the risk that the cable is stolen.

Description

Technical Field

[0001] The utility model relates to the technical field of cable protection, in particular to a cable theft prevention device. Background Art

[0002] During the electromechanical installation process, the cables need to be laid first. After the laying is completed, cables of varying lengths are reserved on one side of the equipment to connect the crimping equipment or the distribution box. Before the cables are connected, the reserved ends are not protected. The construction site has a large flow of people, and the cable ends are easily cut off by the construction workers when they are in chaos on site, and the cables are often lost. For safety reasons, it is not allowed to connect a length of cable from the end when the cable is not long enough. Therefore, the cable is stolen after being shortened, resulting in the entire cable being abandoned or used for other purposes due to insufficient length.

[0003] The existing cable theft prevention device is to install an electronic monitoring instrument on the street light cable or at the end of the street light cable. When the cable is stolen, the system equipment will promptly send out an alarm signal and notify the street light management department and relevant personnel so that timely measures can be taken to prevent the cable from being stolen. However, since it takes time for relevant personnel to arrive at the scene, most of the time when the staff arrives at the scene, the cable has been damaged or stolen, making it inconvenient to protect the cable when in use.

[0004] Based on this, a cable theft prevention device is now provided, which can eliminate the disadvantages of the existing devices. Utility Model Content

[0005] The utility model aims to provide a cable anti-theft device to solve the problems in the background technology.

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

[0007] A cable theft prevention device comprises a protection box, a box door is rotatably provided on one side of the protection box, a lock body is fixedly provided on the box door close to one side of the protection box, a limiting groove is provided on the inner side of the protection box corresponding to the position of the lock tongue on the lock body, a plurality of threading holes are provided on both sides of the interior of the protection box, sealing plates are tightly provided on the inner side of the protection box corresponding to the positions of the threading holes, the sealing plates are fixedly connected to the protection box by screws, supporting slides are symmetrically provided on both sides of the protection box, the supporting slides are slidably provided on the guide frame, two ends of the guide frames are respectively fixed at the two ends of two fixed plates, an adjusting base plate is provided on the guide frame at the position corresponding to the lower position of a supporting slide plate, a first return spring is fixedly provided between the upper end of the adjusting base plate and the bottom end of the supporting slide plate, an alarm is fixedly provided in the mounting hole on the upper end of the fixed plate, and a clamping mechanism for clamping and fixing cables is provided inside the protection box.

[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In an optional scheme: the clamping mechanism includes two groups of symmetrically arranged sliding parts, one group of sliding parts consists of two symmetrically arranged sliding clamping blocks, a fixed mounting plate is fixedly provided inside the protective box, one side of the sliding clamping block is fixedly connected to one end of two tension spring telescopic rods, several tension spring telescopic rods are respectively fixed on the inner side of the protective box and one side of the fixed mounting plate, one side of the sliding clamping block is provided with clamping holes, one side of the sliding clamping block is symmetrically provided with guide blocks, the upper end of the guide block is inclined, and a push plate is tightly provided on one side of the guide block, and several push plates are fixed on one side of the box door.

[0010] In an optional solution: a clamping plate is provided in the clamping hole on one side of the sliding clamping block, the outer side of the clamping plate is rotatably connected to one end of the first threaded rod, and the first threaded rod is arranged in the threaded hole on one side of the sliding clamping block.

[0011] In an optional scheme: a rectangular through hole is provided at the upper end of the adjustment base plate corresponding to the position of the guide frame, a limit plate is fixedly provided in the rectangular through hole, a limit slide groove is provided on the guide frame corresponding to the position of the limit plate, a second threaded rod is rotatably provided on one side of the adjustment base plate, the second threaded rod is arranged in the threaded hole at the upper end of the support plate, and the support plate is fixedly provided on one side of the guide frame.

[0012] In an optional solution: a sealing ring is provided in the threading hole.

[0013] In an optional scheme: a sliding block is symmetrically provided on one side of the fixed plate, and a first guide slide bar is slidably provided in the sliding grooves on both sides of the sliding block, the two first guide slide bars are fixedly provided inside the guide groove rods, a number of connecting plates are fixedly provided between the two guide groove rods, a number of circular through holes are provided on one side of the connecting plate, a limit slider is tightly provided at the lower end of the sliding block, the limit slider is slidably provided in the rectangular through hole on one side of the guide groove rod, a mounting plate is fixedly provided on one side of the limit slider, the two mounting plates are slidably provided on the second guide slide bar, the second guide slide bar is fixedly provided between the two guide groove rods, and a linkage component for driving the two limit sliders to slide is provided between the two mounting plates.

[0014] In an optional scheme: the linkage assembly includes a connecting rod, and the two connecting rods are symmetrically arranged. One end of the connecting rod is rotatably connected to one end of the mounting plate, and the other end of the connecting rod is rotatably connected to one end of the cross bar on the sliding sleeve. A third guide slide rod is slidably arranged inside the sliding sleeve, and one end of the third guide slide rod is fixed on the second guide slide rod. The second guide slide rod is symmetrically provided with a fixed circular plate, and a second return spring is fixed between one side of the fixed circular plate and one side of the mounting plate.

[0015] In an optional solution: a roller is rotatably provided in the mounting groove on one side of the sliding block, a friction plate is tightly provided on one side of the roller, a fourth guide slide rod is slidably provided in the circular through hole on the upper end of the fixed support plate on one side of the friction plate, the fourth guide slide rod is fixed inside the sliding block, and a third return spring is fixed between the upper end of the fixed support plate and one side of the interior of the sliding block.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The utility model stores the cables by winding them around inside the protection box, and arranges a plurality of sliding clamping blocks inside the protection box, so that when the box door is closed, the guide blocks cooperate with the push plates to clamp and fix the cables, which can prevent the cables inside the protection box from being pulled from the outside, thereby reducing the risk of cable theft. At the same time, the protection box is slidably arranged on the guide frame, and the upper end of the protection box is in close contact with the alarm, so that if the cables inside the protection box are forcibly stolen, the upper end of the protection box will be separated from the output end of the alarm, so that the alarm will process the alarm, which is convenient for staff to quickly arrive at the scene, thereby protecting the cables. At the same time, the protection box is slidably arranged inside the guide groove rod by the sliding block, which is convenient for increasing the installation height of the protection box, reducing the risk of cable theft, and also convenient for installing and maintaining the cables inside the protection box, thereby increasing the practicality of the cable anti-theft device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 This is a schematic diagram of the box door structure of the utility model.

[0020] Figure 3 This is a schematic diagram of the installation of the utility model alarm.

[0021] Figure 4 This is a schematic diagram of the structure of the sliding clamping block and the clamping plate of the utility model.

[0022] Figure 5 This is a schematic diagram of the internal structure of the sliding block of the utility model.

[0023] Figure 6 This is a schematic diagram of the installation of the connecting rod of the utility model.

[0024] Notes on figure numbers: 11 protective box, 12 box door, 13 lock body, 14 lock tongue, 15 sliding clamping block, 16 tension spring telescopic rod, 17 clamping plate, 18 first threaded rod, 19 guide block, 20 push plate, 21 sealing ring, 22 sealing plate, 23 supporting slide plate, 24 guide frame, 25 fixing plate, 26 adjusting base plate, 27 first return spring, 28 second threaded rod, 29 alarm, 30 sliding block, 31 guide groove rod, 32 first guide slide bar, 33 connecting plate, 34 limiting slide bar, 35 second guide slide bar, 36 second return spring, 37 connecting rod, 38 sliding sleeve, 39 third guide slide bar, 40 roller, 41 friction plate, 42 third return spring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Example 1

[0027] In one embodiment, Figure 1-Figure 6 As shown, a cable anti-theft device includes a protection box 11, a box door 12 is rotatably provided on one side of the protection box 11, a lock body 13 is fixedly provided on the box door 12 near the side of the protection box 11, a limiting groove is provided on the inner side of the protection box 11 at a position corresponding to the position of the lock tongue 14 on the lock body 13, a plurality of threading holes are provided on both sides of the interior of the protection box 11, sealing plates 22 are closely provided at the inner side of the protection box 11 at the positions corresponding to the threading holes, the sealing plates 22 are fixedly connected to the protection box 11 by screws, and support slides 23 are symmetrically provided on both sides of the protection box 11. The slide plate 23 is slidably arranged on the guide frame 24, and the two ends of the two guide frames 24 are respectively fixed at the two ends of the two fixed plates 25. An adjustment bottom plate 26 is arranged on the guide frame 24 at a position corresponding to the lower position of a support slide plate 23. A first return spring 27 is fixedly arranged between the upper end of the adjustment bottom plate 26 and the lower end of the support slide plate 23. An alarm 29 is fixedly arranged in a mounting hole at the upper end of one of the fixed plates 25. A clamping mechanism for clamping and fixing cables is arranged inside the protection box 11. The clamping mechanism facilitates the clamping and fixing of cables to achieve the purpose of anti-theft.

[0028] The clamping mechanism includes two groups of symmetrically arranged sliding components, one group of sliding components consists of two symmetrically arranged sliding clamping blocks 15, a fixed mounting plate is fixedly arranged inside the protection box 11, one side of the sliding clamping block 15 is fixedly connected to one end of two tension spring telescopic rods 16, several tension spring telescopic rods 16 are respectively fixedly arranged on the inner side of the protection box 11 and one side of the fixed mounting plate, one side of the sliding clamping block 15 is provided with a clamping hole, one side of the sliding clamping block 15 is symmetrically provided with a guide block 19, the upper end of the guide block 19 is inclined, one side of the guide block 19 is tightly provided with a push plate 20, and several of the push plates 20 are fixedly arranged on one side of the box door 12. When in use, when it is necessary to protect the uninstalled cables, the fixed plate 25 is fixed at the installation position, the corresponding sealing ring 21 is removed, and then one end of the cable is passed through the threading hole, and then After that, the cables are coiled and placed inside the protection box 11, and then the box door 12 is closed. The box door 12 drives several push plates 20 to move. When the push plate 20 is in close contact with the inclined surface of the guide block 19, the push plate 20 pushes the guide block 19 to slide, and the guide block 19 pushes the sliding clamping block 15 to slide. When the box door 12 is closed, the lock tongue 14 cooperates with the inner limiting groove of the protection box 11 to fix the box door 12, and one side of the push plate 20 is in close contact with the guide block 19, so that one side of the two sliding clamping blocks 15 is in close contact, so that the cables are fixed to prevent the cables inside the protection box 11 from being pulled from the outside. When someone steals the cables inside the protection box 11, the protection box 11 will slide on the guide frame 24 through the supporting slide plate 23. When the upper end of the protection box 11 is separated from one end of the alarm 29, the alarm 29 is electrically connected to the external control component to alarm, so that the staff can find it in time.

[0029] A clamping plate 17 is provided in the clamping hole on one side of the sliding clamping block 15. The outer side of the clamping plate 17 is rotatably connected to one end of a first threaded rod 18. The first threaded rod 18 is arranged in the threaded hole on one side of the sliding clamping block 15. When in use, when it is necessary to clamp cables of different diameters, the first threaded rod 18 is rotated. Under the action of the thread, the first threaded rod 18 drives the clamping plate 17 to move, so that cables of different diameters can be clamped and fixed.

[0030] A rectangular through hole is provided at the upper end of the adjusting base plate 26 corresponding to the position of the guide frame 24, a limit plate is fixedly provided in the rectangular through hole, a limit slide groove is provided on the guide frame 24 corresponding to the position of the limit plate, a second threaded rod 28 is rotatably provided on one side of the adjusting base plate 26, the second threaded rod 28 is arranged in the threaded hole at the upper end of the support plate, and the support plate is fixedly arranged on one side of the guide frame 24. When in use, when it is necessary to adjust the elastic force of the first return spring 27, the second threaded rod 28 can be rotated, and under the action of the thread, the second threaded rod 28 pushes the adjusting base plate 26 to slide on the guide frame 24, thereby adjusting the elastic force of the first return spring 27.

[0031] A sealing ring 21 is provided in the threading hole. During use, when the cable needs to be protected, the sealing plate 22 is removed and the sealing ring 21 is installed in the threading hole to close the threaded hole inside the protection box 11. Then, one end of the cable is passed through the threading hole so that the inner side of the sealing ring 21 is tightly attached to the cable, thereby sealing the inside of the protection box 11.

[0032] Example 2

[0033] The difference from Example 1 is that: a sliding block 30 is symmetrically provided on one side of the fixed plate 25, and first guide slide bars 32 are slidably provided in the sliding grooves on both sides of the sliding block 30, and the two first guide slide bars 32 are fixedly provided inside the guide groove rod 31, and a plurality of connecting plates 33 are fixedly provided between the two guide groove rods 31, and a plurality of circular through holes are provided on one side of the connecting plate 33, and a limiting slider 34 is tightly provided at the lower end of the sliding block 30, and the limiting slider 34 is slidably provided in the rectangular through hole on one side of the guide groove rod 31, and a mounting plate is fixedly provided on one side of the limiting slider 34, and the two mounting plates are slidably provided on the second guide slide bar 35, and the second guide slide bar 35 is fixedly provided between the two guide groove rods 31, and a linkage component for driving the two limiting slide bars 34 to slide is provided between the two mounting plates. When in use, The two first guide slide bars 32 are fixed at the installation position through several circular perforations on one side of the connecting plate 33, and then the protection box 11 is pushed. The protection box 11 slides inside the guide groove rod 31 through the sliding block 30. When the upper end of the sliding block 30 is tightly against the bottom end of the limit slide bar 34, the sliding block 30 pushes the limit slide bar 34 to slide. When the bottom end of the sliding block 30 is tightly against the upper end of the limit slide bar 34, the limit slide bar 34 is returned to the initial position through the linkage assembly, thereby fixing the position of the protection box 11, thereby increasing the height of the protection box 11 during installation and reducing the risk of cable theft. When the cable needs to be installed or repaired, the two limit slide bars 34 are driven to move through the linkage assembly, so that the two limit slide bars 34 are simultaneously separated from the bottom end of the sliding block 30, thereby allowing the protection box 11 to slide along the length direction of the guide groove rod 31, which is convenient for the installation and repair of the cable.

[0034] The linkage assembly includes a connecting rod 37, and the two connecting rods 37 are symmetrically arranged. One end of the connecting rod 37 is rotatably connected to one end of the mounting plate, and the other end of the connecting rod 37 is rotatably connected to one end of the cross bar on the sliding sleeve 38. A third guide slide bar 39 is slidably provided inside the sliding sleeve 38, and one end of the third guide slide bar 39 is fixedly provided on the second guide slide bar 35. A fixed circular plate is symmetrically provided on the second guide slide bar 35, and a second return spring 36 is fixedly provided between one side of the fixed circular plate and one side of the mounting plate. When in use, when it is necessary to release the fixation of the protection box 11, the sliding sleeve 38 is pulled so that the sliding sleeve 38 slides on the third guide slide bar 39, and the sliding sleeve 38 pulls the two mounting plates to slide along the axial direction of the second guide slide bar 35 through the connecting rod 37, and the mounting plate drives the limit slider 34 to slide, so that the limit slider 34 disengages from the bottom end of the sliding block 30, thereby releasing the fixation of the protection box 11, and then the sliding sleeve 38 is released, and the limit slider 34 returns to the initial position under the action of the second return spring 36.

[0035] A roller 40 is rotatably arranged in the mounting groove on one side of the sliding block 30, a friction plate 41 is tightly arranged on one side of the roller 40, a fourth guide slide bar is slidably arranged in the circular through hole at the upper end of the fixed support plate on one side of the friction plate 41, the fourth guide slide bar is fixedly arranged inside the sliding block 30, a third return spring 42 is fixedly arranged between the upper end of the fixed support plate and one side of the inside of the sliding block 30, when in use, when the sliding block 30 drives the protection box 11 to descend along the length direction of the guide groove rod 31, the roller 40 is tightly arranged on the inner side of the guide groove rod 31, The roller 40 rotates, and since the friction plate 41 is in close contact with the roller 40, the bottom end of the friction plate 41 is in close contact with the bottom end of the inner part of the sliding block 30 when the roller 40 rotates. The friction plate 41 is in close contact with the roller 40, thereby increasing the resistance when the roller 40 rotates to prevent the protective box 11 from descending too quickly. When the protective box 11 rises, the roller 40 rotates in the opposite direction. When the roller 40 is in close contact with the friction plate 41, the friction plate 41 slides along the axis of the fourth guide slide bar, so that the friction plate 41 is separated from the roller 40, thereby facilitating the movement of the protective box 11.

[0036] The above embodiment discloses a cable theft prevention device, wherein when it is necessary to protect the uninstalled cables, the two first guide slide bars 32 are fixed at the installation position through the several circular perforations on one side of the connecting plate 33, the corresponding sealing ring 21 is removed, and then one end of the cable is passed through the threading hole, and then the cable is coiled and placed inside the protection box 11, and then the box door 12 is closed, and the box door 12 drives the several push plates 20 to move, and when the push plates 20 are in close contact with the inclined surface of the guide block 19, the push plates 20 push the guide block 19 to slide, and the guide block 19 pushes The sliding clamping block 15 slides, and when the box door 12 is closed, the lock tongue 14 cooperates with the inner limit groove of the protection box 11 to fix the box door 12, and one side of the push plate 20 is in close contact with the guide block 19, so that the two sides of the sliding clamping blocks 15 are in close contact, so that the cables are fixed to prevent the cables inside the protection box 11 from being pulled from the outside. Then the protection box 11 is pushed, and the protection box 11 slides inside the guide groove rod 31 through the sliding block 30. When the upper end of the sliding block 30 is in close contact with the bottom end of the limit slider 34, the sliding block 30 pushes the limit slider 34 to slide When the bottom end of the sliding block 30 is in close contact with the upper end of the limiting slider 34, the limiting slider 34 is returned to the initial position through the second return spring 36, and the position of the protection box 11 can be fixed. At the same time, the installation height of the protection box 11 is increased to reduce the risk of cable theft. When the protection box 11 needs to be released, the sliding sleeve 38 is pulled so that the sliding sleeve 38 slides on the third guide slide bar 39. The sliding sleeve 38 pulls the two mounting plates to slide along the axis direction of the second guide slide bar 35 through the connecting rod 37, and the mounting plate drives the limiting slider 34 to slide, so that The limit slider 34 disengages from the bottom end of the sliding block 30, thereby releasing the fixation of the protection box 11, and then the sliding sleeve 38 is loosened, and the limit slider 34 returns to the initial position under the action of the second return spring 36. When someone steals the cables inside the protection box 11, if they forcibly try to open the box door 12, the protection box 11 will slide on the guide frame 24 through the supporting slide plate 23. When the upper end of the protection box 11 is separated from one end of the alarm 29, the alarm 29 is electrically connected to the external control component to sound an alarm, so that the staff can discover it in time.

[0037] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A cable anti-theft device, comprising a protection box (11), a box door (12) is rotatably provided on one side of the protection box (11), a lock body (13) is fixedly provided on the box door (12) close to the side of the protection box (11), a limit groove is provided on the inner side of the protection box (11) at a position corresponding to the position of a lock tongue (14) on the lock body (13), a plurality of threading holes are provided on both sides of the interior of the protection box (11), and sealing plates (22) are tightly provided on the inner side of the protection box (11) at positions corresponding to the positions of the threading holes, and the sealing plates (22) are fixedly connected to the protection box (11) by screws, characterized in that: Support slides (23) are symmetrically provided on both sides of the protection box (11), and the support slides (23) are slidably arranged on the guide frame (24). The two ends of the two guide frames (24) are respectively fixed at the two ends of the two fixed plates (25). An adjustment base plate (26) is provided on the guide frame (24) at a position corresponding to the position below a support slide (23). A first return spring (27) is fixedly provided between the upper end of the adjustment base plate (26) and the lower end of the support slide (23). An alarm (29) is fixedly provided in a mounting hole at the upper end of one of the fixed plates (25). A clamping mechanism for clamping and fixing cables is provided inside the protection box (11).

2. A cable anti-theft device according to claim 1, characterized in that: The clamping mechanism comprises two groups of symmetrically arranged sliding components, one group of the sliding components consists of two symmetrically arranged sliding clamping blocks (15), a fixed mounting plate is fixedly arranged inside the protective box (11), one side of the sliding clamping block (15) is respectively fixedly connected to one end of two tension spring telescopic rods (16), a plurality of tension spring telescopic rods (16) are respectively fixedly arranged on the inner side of the protective box (11) and one side of the fixed mounting plate, a clamping hole is arranged on one side of the sliding clamping block (15), a guide block (19) is symmetrically arranged on one side of the sliding clamping block (15), the upper end of the guide block (19) is inclined, a push plate (20) is tightly arranged on one side of the guide block (19), and a plurality of the push plates (20) are fixedly arranged on one side of the box door (12).

3. A cable anti-theft device according to claim 2, characterized in that: A clamping plate (17) is provided in a clamping hole on one side of the sliding clamping block (15). The outer side of the clamping plate (17) is rotatably connected to one end of a first threaded rod (18). The first threaded rod (18) is arranged in a threaded hole on one side of the sliding clamping block (15).

4. A cable anti-theft device according to claim 1, characterized in that: A rectangular through hole is provided at the upper end of the adjusting base plate (26) at a position corresponding to the position of the guide frame (24), a limiting plate is fixedly provided in the rectangular through hole, a limiting sliding groove is provided on the guide frame (24) at a position corresponding to the position of the limiting plate, a second threaded rod (28) is rotatably provided on one side of the adjusting base plate (26), the second threaded rod (28) is arranged in a threaded hole at the upper end of a support plate, and the support plate is fixedly provided on one side of the guide frame (24).

5. A cable anti-theft device according to claim 1, characterized in that: A sealing ring (21) is arranged in the threading hole.

6. A cable anti-theft device according to claim 1, characterized in that: A sliding block (30) is symmetrically provided on one side of the fixed plate (25), and first guide slide bars (32) are slidably provided in the sliding grooves on both sides of the sliding block (30), and the two first guide slide bars (32) are fixedly provided inside the guide groove rod (31), and a plurality of connecting plates (33) are fixedly provided between the two guide groove rods (31), and a plurality of circular through holes are provided on one side of the connecting plate (33), and a limiting slider (34) is tightly provided at the lower end of the sliding block (30), and the limiting slider (34) is slidably provided in the rectangular through hole on one side of the guide groove rod (31), and a mounting plate is fixedly provided on one side of the limiting slider (34), and the two mounting plates are slidably provided on the second guide slide bar (35), and the second guide slide bar (35) is fixedly provided between the two guide groove rods (31), and a linkage component for driving the two limiting slide bars (34) to slide is provided between the two mounting plates.

7. A cable anti-theft device according to claim 6, characterized in that: The linkage assembly comprises a connecting rod (37), wherein the two connecting rods (37) are symmetrically arranged, one end of the connecting rod (37) is rotatably connected to one end of the mounting plate, and the other end of the connecting rod (37) is rotatably connected to one end of a cross bar on a sliding sleeve (38), a third guide slide rod (39) is slidably arranged inside the sliding sleeve (38), one end of the third guide slide rod (39) is fixedly arranged on the second guide slide rod (35), a fixed circular plate is symmetrically arranged on the second guide slide rod (35), and a second return spring (36) is fixedly arranged between one side of the fixed circular plate and one side of the mounting plate.

8. A cable anti-theft device according to claim 6, characterized in that: A roller (40) is rotatably arranged in a mounting groove on one side of the sliding block (30), a friction plate (41) is closely arranged on one side of the roller (40), a fourth guide slide bar is slidably arranged in a circular through hole at the upper end of a fixed support plate on one side of the friction plate (41), the fourth guide slide bar is fixedly arranged inside the sliding block (30), and a third return spring (42) is fixedly arranged between the upper end of the fixed support plate and one side of the interior of the sliding block (30).

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