Height-adjustable monitor

Abstract

The utility model provides a height-adjustable monitor, which comprises a support, a height adjusting component, a height adjusting component, a height adjusting component and a height adjusting component, wherein the height adjusting component is mounted on the surface of the support and used for adjusting the height of the monitor; the wire is electrically connected with a monitoring head of the monitor, and the other end of the wire is electrically connected with the power supply line through the take-up and pay-off assembly; and the anti-falling mechanism is mounted on the side surface of the height adjusting component. When the non-motor vehicle is parked in the no-parking area, the monitoring head monitors the non-motor vehicle, warning is performed through the warning lamp and the alarm, the illegal parking condition is avoided, the height adjusting component also facilitates downward movement of the monitoring head in the overhaul process, workers can overhaul the monitoring head conveniently, and the maintenance efficiency is improved. And the wire electrically connected with the monitoring head is moved by matching with the height adjusting component through the winding and unwinding assembly, so that the wire can be automatically wound and unwound along with the movement of the monitoring head, and the orderly and stable connection of the wire and the monitoring head is ensured.

Description

Technical Field

[0001] The utility model relates to a height-adjustable monitor. Background Art

[0002] "Non-motor vehicle" refers to a vehicle that is driven by human or animal power and travels on the road, as well as a vehicle or motorized wheelchair for the disabled that is driven by a power device but has a designed maximum speed, empty vehicle weight, and external dimensions that comply with relevant national standards.

[0003] The existing non-motor vehicle illegal parking on the road is becoming more and more serious. The existing technology mostly intervenes and manages through manpower, which increases manpower costs. However, the existing monitors are mostly fixed in one position for monitoring and warning. If they are too high, it is inconvenient for workers to maintain them. If they are too low, the monitoring range will be reduced and the height cannot be adjusted according to needs. During the height adjustment process of some existing height-adjustable monitors, the laid wires will be dragged as the monitor moves in height, affecting the stability of the connection between the monitor and the wires, resulting in the disconnection of the wires and the monitor. Utility Model Content

[0004] The utility model provides a height-adjustable monitor in order to solve the technical problem that in the process of height adjustment of some existing height-adjustable monitors, the laid wires will be dragged as the height of the monitor moves, affecting the stability of the connection between the monitor and the wires, and causing the wires and the monitor to be disconnected.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a height-adjustable monitor, which comprises:

[0007] A bracket, a height adjustment component for adjusting the height of the monitor is mounted on the surface of the bracket;

[0008] A wire, the wire is electrically connected to the monitoring head of the monitor, and the other end of the wire is electrically connected to the power supply line through the retractable wire assembly;

[0009] An anti-falling mechanism is installed on the side surface of the height adjustment component.

[0010] In the present technical scheme, the bracket is used for the fixed installation of the height adjustment component. The height of the monitoring head of the monitor is adjusted through height adjustment to facilitate monitoring. When the non-motor vehicle is parked in the prohibited parking area, the monitoring head monitors it and warns it through the alarm light and the alarm to avoid illegal parking. The height adjustment component is also convenient for moving the monitoring head downward during maintenance, which is convenient for workers to inspect the monitoring head. The wires electrically connected to the monitoring head are moved through the retraction assembly in conjunction with the height adjustment component, which is convenient for the wires to be automatically retracted and released as the monitoring head moves, ensuring that the wires are connected to the monitoring head in an orderly and stable manner. At the same time, during the height adjustment, the wires are fixed during the lifting process through the setting of the anti-falling mechanism, and it is convenient to set the anti-falling setting at the connection between the wire and the monitoring head, so as to achieve a stable connection between the wire and the monitoring head and ensure the normal operation of the monitoring head during height adjustment.

[0011] Furthermore, the bracket includes a support shell and a base, the support shell is fixedly mounted on the top surface of the base, a shell plate fixed by fixing bolts is arranged on the front side of the support shell, and mounting bolts are installed on the surface of the base.

[0012] In this technical solution, the bracket can be easily fixed by installing bolts to ensure stable placement of the bracket.

[0013] Furthermore, the height adjustment component includes a servo motor, a threaded column, an adjustment seat and a mounting platform. The servo motor is fixedly mounted on the top surface of the support shell. The output end of the servo motor is connected to a threaded column. The surface of the threaded column is threadedly sleeved with an adjustment seat that is slidably connected to the inner wall of the support shell. A mounting platform for installing a monitoring head is installed on one side surface of the adjustment seat.

[0014] In this technical solution, when the servo motor is working, the servo motor can adjust the position of the adjustment seat through the threaded column, and the adjustment seat moves along the inner wall of the support shell, so that the adjustment seat can synchronously drive the mounting table to move stably.

[0015] Furthermore, a limiting seat with a T-shaped structure is fixedly mounted on a side surface of the adjustment seat away from the shell plate, and the limiting seat is slidably connected to a limiting groove with a T-shaped structure opened on the surface of the supporting shell.

[0016] In the present technical solution, the limit seat is matched with the corresponding limit slot, and the limit slot limits the movement of the limit seat to ensure the stable movement of the adjustment seat.

[0017] Furthermore, the mounting seat surface of the monitoring head is fixedly connected to the mounting platform by bolts, and an alarm and an alarm light are installed on the side surface of the monitoring head. The monitoring head is used to monitor illegally parked non-motor vehicles, and the installed alarm and alarm light are used to warn cyclists to adjust their positions.

[0018] In this technical solution, the monitoring head can be detachably fixed to the mounting platform by bolts. The height of the monitoring head can be adjusted as the height of the mounting platform is adjusted. The monitoring head monitors illegally parked non-motor vehicles and issues real-time warnings through sirens and warning lights, thereby reducing illegal parking situations, avoiding manual warnings for illegal parking, and improving efficiency.

[0019] Furthermore, the retractable wire assembly includes a retractable and discharge motor, an electric slip ring, a retractable wheel and a guide portion. The output shaft of the retractable and discharge motor is connected to the rotor of the electric slip ring. A retractable wheel is installed at the end of the rotor of the electric slip ring, and a wire is wound around the surface of the retractable wheel.

[0020] In this technical solution, the retracting and releasing wheel is driven by the retracting and releasing motor to rotate, and the retracting and releasing wheel performs a winding and releasing operation on the wire. During the winding and releasing process of the wire, the guide part is used to guide the wire to ensure orderly and limited movement of the wire to avoid subsequent winding and entanglement.

[0021] Furthermore, the rotor of the electric slip ring is electrically connected to one end of the conducting wire, the stator of the electric slip ring is electrically connected to one end of the power supply line, and the power supply line passes through the inner cavity of the through hole opened on the side surface of the supporting shell.

[0022] In this technical solution, it is convenient to electrically connect the conductor and the power supply line through the electric slip ring, and it is ensured that the take-up wheel can stably reel up the conductor.

[0023] Furthermore, the guide portion includes two first wire rollers, the surfaces of the two first wire rollers are provided with first wire grooves, the wires pass through the two first wire rollers, a first wire shaft is installed inside the first wire rollers, and the first wire shaft is fixedly connected to a first fixing seat fixed on the inner wall of the support shell.

[0024] In the technical solution, the conductor passes through the first conductor groove between the two first conductor rollers and is guided by the first conductor rollers to ensure the orderly conduction of the conductor.

[0025] Further, the anti-falling mechanism includes a fixing ring, a limiting part and a fastener, the fixing ring is fixedly mounted on the side surface of the adjusting seat, a guide cylinder is slidably penetrated through the inner cavity of the fixing ring, a wire is penetrated through the inner cavity of the guide cylinder, a fastener for fixing the wire is installed at one end of the guide cylinder, a fixing nut is installed at the other end of the guide cylinder, and a buffer component is installed on the surface of the guide cylinder;

[0026] The fastener is a fastening bolt, which is symmetrically arranged on two opposite sides of one end of the guide cylinder, and a rubber pad is fixedly installed at the end of the fastening bolt;

[0027] The fixing nut is threadedly connected to the left end of the guide cylinder, and an anti-collision pad sleeved on the surface of the guide cylinder is attached to the right side of the fixing nut;

[0028] The buffer component includes a buffer spring and a limiting ring, the limiting ring is fixedly mounted on the surface of the guide cylinder, the buffer spring is arranged between the fixing ring and the limiting ring, and the buffer spring is sleeved on the surface of the guide cylinder;

[0029] The limiting part includes a second fixed seat, a second wire roller and a second wire groove, the second fixed seat is fixedly installed on the inner wall of the support shell, a second wire shaft is fixedly installed on the front surface of the second fixed seat, a second wire roller is sleeved on the surface of the second wire shaft, a second wire groove surface is opened on the surface of the second wire roller, a second wire groove is opened on the surface of the second wire roller, and a wire groove is arranged between the second wire rollers.

[0030] In the present technical scheme, a buffer spring is sleeved on the surface of the guide cylinder, and the guide cylinder is sleeved in the fixing ring. The fixing nut is fixed on one end of the guide cylinder to realize the placement of the buffer spring, and the wire is passed through the guide cylinder. By rotating the fastening bolt, the end of the fastening bolt pushes the fixedly connected rubber pad to fit the wire, so as to facilitate the fixed connection between the wire and the guide cylinder. When adjusting the height of the monitoring head, the adjustment seat drives the monitoring head to move, and the force exerted on the wire is buffered by the buffer spring to ensure the stability of the connection between the wire and the monitoring head. This solves the problem of the lack of a fixing mechanism at the connection between the traditional monitoring head and the wire, which may cause dragging between the wire and the monitoring head, resulting in an unstable connection between the monitoring head and the wire.

[0031] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0032] The positive and progressive effects of the utility model are:

[0033] The height-adjustable monitor proposed above can adjust the height of the monitoring head of the monitor by height adjustment, which is convenient for monitoring. When a non-motor vehicle is parked in a prohibited parking area, the monitoring head monitors it and warns it through alarm lights and alarms to avoid illegal parking, saving manpower. The height-adjustable component also makes it convenient to move the monitoring head downward during maintenance, which is convenient for workers to inspect the monitoring head.

[0034] Furthermore, by cooperating with the height adjustment component, the wires can be automatically retracted and extended as the monitoring head moves, so that the wires can move in an orderly and stable manner, thereby ensuring a stable connection between the wires and the monitoring head. At the same time, during height adjustment, the retractable component cooperates with the setting of the anti-falling mechanism, and the anti-falling mechanism fixes the wires during the lifting process, thereby realizing an anti-falling setting at the connection between the wires and the monitoring head, ensuring a stable connection between the wires and the monitoring head, and reducing the external force on the wires, thereby ensuring the normal operation of the monitoring head during height adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1It is a schematic diagram of the three-dimensional structure of the interior of the monitor of the utility model from the front side.

[0036] Figure 2 It is a schematic diagram of the three-dimensional structure of the monitor under the front of the utility model.

[0037] Figure 3 The utility model monitor is the overall Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0038] Figure 4 The utility model monitor is the overall Figure 1 Schematic diagram of the local enlarged structure at point B in the middle.

[0039] Figure 5 The utility model is a schematic diagram of the top view of the connection structure between the adjustment seat and the anti-drop mechanism of the monitor.

[0040] Figure 6 The utility model is a schematic diagram of the cross-sectional connection structure of the wire and the fastener of the monitor.

[0041] Description of Reference Numerals

[0042] 1. Bracket; 11. Base; 12. Mounting bolts; 13. Support shell; 131. Through hole; 14. Shell plate; 15. Fixing bolts;

[0043] 2. Height adjustment component; 21. Servo motor; 22. Threaded column; 23. Adjustment seat; 24. Limit seat; 25. Mounting table;

[0044] 3. Power supply line;

[0045] 4. Wire;

[0046] 5. Siren;

[0047] 6. Retractable and retractable wire assembly; 61. Retractable and retractable electric motor; 62. Electric slip ring; 63. First fixed seat; 64. First wire roller; 641. First wire groove; 65. Retractable wire wheel;

[0048] 7. Anti-drop mechanism; 71. Fixing ring; 72. Fixing nut; 73. Anti-collision pad; 74. Buffer spring; 75. Guide cylinder; 76. Fastening bolt; 77. Rubber pad; 78. Second fixing seat; 79. Second wire roller; 791. Second wire groove; 710. Limiting ring;

[0049] 8. Monitoring head;

[0050] 9. Warning light. DETAILED DESCRIPTION

[0051] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0052] like Figure 1-6 As shown, the height adjustable monitor comprises:

[0053] A bracket 1, wherein a height adjustment component 2 for adjusting the height of the monitor is mounted on the surface of the bracket 1;

[0054] A wire 4, wherein the wire 4 is electrically connected to a monitoring head 8 of the monitor, and the other end of the wire 4 is electrically connected to the power supply line 3 through a retractable wire assembly 6;

[0055] The anti-falling mechanism 7 is installed on the side surface of the height adjustment component 2.

[0056] The bracket 1 is used for the fixed installation of the height adjustment component 2. The height of the monitoring head 8 of the monitor is adjusted through height adjustment to facilitate monitoring. When the non-motor vehicle is parked in a prohibited parking area, the monitoring head 8 monitors it and warns it through the alarm light and the alarm 5 to avoid illegal parking. The height adjustment component 2 is also convenient for moving the monitoring head 8 downward during maintenance, which is convenient for workers to inspect the monitoring head 8. The wire 4 electrically connected to the monitoring head 8 moves through the retraction component in conjunction with the height adjustment component 2, which is convenient for the wire 4 to be automatically retracted and released as the monitoring head 8 moves, ensuring that the wire 4 is connected to the monitoring head 8 in an orderly and stable manner. At the same time, during the height adjustment, the wire 4 is fixed during the lifting process through the setting of the anti-falling mechanism 7, and it is convenient to set the anti-falling setting at the connection between the wire 4 and the monitoring head 8, so as to achieve a stable connection between the wire 4 and the monitoring head 8 and ensure the normal operation of the monitoring head 8 during the height adjustment.

[0057] The bracket 1 includes a supporting shell 13 and a base 11. The supporting shell 13 is fixedly installed on the top surface of the base 11. The front side of the supporting shell 13 is provided with a shell plate 14 fixed by fixing bolts 15. The surface of the base 11 is installed with mounting bolts 12, which facilitates the bracket 1 to be fixed by the mounting bolts 12, thereby ensuring the stable placement of the bracket 1.

[0058] The height adjustment component 2 includes a servo motor 21, a threaded column 22, an adjustment seat 23 and a mounting platform 25. The servo motor 21 is fixedly mounted on the top surface of the support shell 13. The output end of the servo motor 21 is connected to the threaded column 22. The surface of the threaded column 22 is threadedly sleeved with the adjustment seat 23 which is slidably connected to the inner wall of the support shell 13. A mounting platform 25 for installing the monitoring head 8 is installed on one side surface of the adjustment seat 23.

[0059] When the servo motor 21 is working, the servo motor 21 can adjust the position of the adjustment seat through the threaded column 22, and the adjustment seat 23 moves along the inner wall of the support shell 13, so that the adjustment seat 23 can synchronously drive the mounting platform 25 to move stably.

[0060] A T-shaped limit seat 24 is fixedly installed on the side surface of the adjustment seat 23 away from the shell plate 14. The limit seat 24 is slidably connected to a T-shaped limit groove opened on the surface of the support shell 13. The limit seat 24 is matched with the corresponding limit groove. The limit groove limits the movement of the limit seat 24 to ensure stable movement of the adjustment seat 23.

[0061] The mounting seat surface of the monitoring head 8 is fixedly connected to the mounting platform 25 by bolts, and the side surface of the monitoring head 8 is installed with an alarm 5 and an alarm light. The monitoring head 8 is used to monitor illegally parked non-motor vehicles, and the installed alarm 5 and alarm light are used to warn the cyclist to adjust the position.

[0062] The monitoring head 8 is detachably fixed to the mounting platform 25 by bolts. The height of the monitoring head 8 can be adjusted as the height of the mounting platform 25 is adjusted. The monitoring head 8 monitors illegally parked non-motor vehicles and issues real-time warnings through the alarm 5 and the alarm light, thereby reducing illegal parking situations, avoiding manual warnings for illegal parking, and improving efficiency.

[0063] The retractable wire assembly 6 includes a retractable and discharge motor 61, an electric slip ring 62, a retractable wire wheel 65 and a guide portion. The output shaft of the retractable and discharge motor 61 is connected to the rotor of the electric slip ring 62. The retractable wire wheel 65 is installed at the end of the rotor of the electric slip ring 62. The surface of the retractable wire wheel 65 is wound with the conductor 4.

[0064] When the retracting and discharging motor 61 drives the take-up wheel 65 to rotate, the take-up and discharging wheel performs a reeling operation on the wire 4. During the reeling and discharging process of the wire 4, the guide part guides the wire 4 to ensure orderly limited movement of the wire 4 to avoid subsequent reeling and entanglement.

[0065] The rotor of the electric slip ring 62 is electrically connected to one end of the wire 4, and the stator of the electric slip ring 62 is electrically connected to one end of the power supply line 3. The power supply line 3 passes through the inner cavity of the through hole 131 opened on the side surface of the support shell 13, which facilitates the electrical connection between the wire 4 and the power supply line 3 through the electric slip ring 62, and ensures that the take-up wheel 65 stably reels the wire 4.

[0066] The guiding part includes two first wire rollers, and the surfaces of the two first wire rollers 64 are provided with first wire grooves, and the wire 4 passes through the two first wire rollers 64. A first wire shaft is installed in the first wire roller, and the first wire shaft is fixedly connected to a first fixing seat 63 fixed on the inner wall of the supporting shell 13. The wire 4 passes through the first wire groove between the two first wire rollers and is guided by the first wire rollers to ensure that the wire 4 is carried out in an orderly manner.

[0067] The anti-drop mechanism 7 includes a fixing ring 71, a limiting part and a fastener. The fixing ring 71 is fixedly mounted on the side surface of the adjustment seat 23. A guide cylinder 75 is slidably penetrated through the inner cavity of the fixing ring 71. The inner cavity of the guide cylinder 75 penetrates the wire 4. A fastener for fixing the wire 4 is installed at one end of the guide cylinder 75. A fixing nut 72 is installed at the other end of the guide cylinder 75. A buffer component is installed on the surface of the guide cylinder 75.

[0068] The fastener is a fastening bolt 76, which is symmetrically arranged on two opposite sides of one end of the guide cylinder 75, and a rubber pad 77 is fixedly installed at the end of the fastening bolt 76;

[0069] The fixing nut 72 is threadedly connected to the left end of the guide cylinder 75, and the right side of the fixing nut 72 is attached with an anti-collision pad 73 sleeved on the surface of the guide cylinder 75;

[0070] The buffer component includes a buffer spring 74 and a limiting ring 710, the limiting ring 710 is fixedly mounted on the surface of the guide cylinder 75, the buffer spring 74 is arranged between the fixing ring 71 and the limiting ring 710, and the buffer spring 74 is sleeved on the surface of the guide cylinder 75;

[0071] The limiting part includes a second fixing seat 78, a second wire roller 79 and a second wire groove. The second fixing seat 78 is fixedly mounted on the inner wall of the support shell 13. A second wire shaft is fixedly mounted on the front surface of the second fixing seat 78. A second wire roller 79 is sleeved on the surface of the second wire shaft. A second wire groove surface is provided on the surface of the second wire roller 79. A second wire groove is provided on the surface of the second wire roller 79. A wire 4 is provided between the second wire rollers 79.

[0072] The surface of the guide cylinder 75 is sleeved with a buffer spring 74, and the guide cylinder 75 is sleeved in the fixing ring 71. The fixing nut 72 is fixed to one end of the guide cylinder 75 to place the buffer spring 74, and the wire 4 is passed through the guide cylinder 75. By rotating the fastening bolt 76, the end of the fastening bolt 76 pushes the fixedly connected rubber pad 77 to fit the wire 4, so as to facilitate the fixed connection between the wire 4 and the guide cylinder 75. When the height of the monitoring head 8 is adjusted, the adjustment seat 23 drives the monitoring head 8 to move, and the force exerted on the wire 4 is buffered by the buffer spring 74 to ensure the stability of the connection between the wire 4 and the monitoring head 8. This solves the problem that the traditional monitoring head 8 and the wire 4 connection lacks a fixing mechanism, which may cause dragging between the wire 4 and the monitoring head 8, resulting in an unstable connection between the monitoring head 8 and the wire 4.

[0073] The utility model is not limited to the above-mentioned embodiments. Any changes in shape or structure are within the protection scope of the utility model. The protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the utility model, but these changes and modifications are within the protection scope of the utility model.

Claims

1. A height-adjustable monitor, characterized in that: The height adjustable monitor comprises: A bracket (1), wherein a height adjustment component (2) for adjusting the height of a monitor is mounted on the surface of the bracket (1); A wire (4), the wire (4) being electrically connected to a monitoring head (8) of a monitor, and the other end of the wire (4) being electrically connected to a power supply line (3) via a retractable wire assembly (6); An anti-falling mechanism (7) is installed on the side surface of the height adjustment component (2).

2. The height-adjustable monitor according to claim 1, characterized in that: The bracket (1) comprises a support shell (13) and a base (11); the support shell (13) is fixedly mounted on the top surface of the base (11); a shell plate (14) fixed by fixing bolts (15) is arranged on the front side of the support shell (13); and mounting bolts (12) are mounted on the surface of the base (11).

3. The height-adjustable monitor according to claim 1, wherein: The height adjustment component (2) comprises a servo motor (21), a threaded column (22), an adjustment seat (23) and a mounting platform (25); the servo motor (21) is fixedly mounted on the top surface of the support shell (13); the output end of the servo motor (21) is connected to the threaded column (22); the surface of the threaded column (22) is threadedly sleeved with the adjustment seat (23) which is slidably connected to the inner wall of the support shell (13); and a mounting platform (25) for mounting a monitoring head (8) is mounted on one side surface of the adjustment seat (23).

4. The height-adjustable monitor according to claim 3, characterized in that: A T-shaped limiting seat (24) is fixedly mounted on a surface of the adjustment seat (23) on one side away from the shell plate (14); the limiting seat (24) is slidably connected to a T-shaped limiting groove provided on the surface of the support shell (13).

5. The height-adjustable monitor according to claim 1, wherein: The mounting seat surface of the monitoring head (8) is fixedly connected to the mounting platform (25) by means of bolts, and an alarm (5) and an alarm light (9) are installed on the side surface of the monitoring head (8). The monitoring head (8) is used to monitor illegally parked non-motor vehicles, and the installed alarm (5) and alarm light (9) are used to warn the rider to adjust the position of the vehicle.

6. The height-adjustable monitor according to claim 1, wherein: The retractable wire assembly (6) comprises a retractable and dischargeable motor (61), an electric slip ring (62), a retractable wire wheel (65) and a guide portion. The output shaft of the retractable and dischargeable motor (61) is connected to the rotor of the electric slip ring (62). The retractable wire wheel (65) is installed at the end of the rotor of the electric slip ring (62). The surface of the retractable wire wheel (65) is wound with a conductive wire (4).

7. The height-adjustable monitor according to claim 6, characterized in that: The rotor of the electric slip ring (62) is electrically connected to one end of the conductor (4), and the stator of the electric slip ring (62) is electrically connected to one end of the power supply line (3), and the power supply line (3) passes through the inner cavity of a through hole (131) opened on the side surface of the support shell (13).

8. The height-adjustable monitor according to claim 6, wherein: The guide portion comprises two first wire rollers (64), the surfaces of the two first wire rollers (64) are provided with first wire grooves, a wire (4) passes through the two first wire rollers (64), a first wire shaft is installed inside the first wire rollers (64), and the first wire shaft is fixedly connected to a first fixing seat (63) fixed on the inner wall of the support shell (13).

9. The height-adjustable monitor according to claim 1, wherein: The anti-falling mechanism (7) comprises a fixing ring (71), a limiting part and a fastener, wherein the fixing ring (71) is fixedly mounted on the side surface of the adjusting seat (23), a guide cylinder (75) is slidably penetrated through the inner cavity of the fixing ring (71), a wire (4) is penetrated through the inner cavity of the guide cylinder (75), a fastener for fixing the wire (4) is mounted on one end of the guide cylinder (75), a fixing nut (72) is mounted on the other end of the guide cylinder (75), and a buffer component is mounted on the surface of the guide cylinder (75); The fastener is a fastening bolt (76), and the fastening bolt (76) is symmetrically arranged on two opposite sides of one end of the guide cylinder (75), and a rubber pad (77) is fixedly installed at the end of the fastening bolt (76); The fixing nut (72) is threadedly connected to the left end of the guide cylinder (75), and the right side of the fixing nut (72) is fitted with an anti-collision pad (73) sleeved on the surface of the guide cylinder (75); The buffer component comprises a buffer spring (74) and a limiting ring (710), wherein the limiting ring (710) is fixedly mounted on the surface of the guide cylinder (75), the buffer spring (74) is arranged between the fixing ring (71) and the limiting ring (710), and the buffer spring (74) is sleeved on the surface of the guide cylinder (75); The limiting portion comprises a second fixed seat (78), a second wire roller (79) and a second wire groove, wherein the second fixed seat (78) is fixedly mounted on the inner wall of the support shell (13), a second wire shaft is fixedly mounted on the front surface of the second fixed seat (78), a second wire roller (79) is sleeved on the surface of the second wire shaft, a second wire groove surface is provided on the surface of the second wire roller (79), a second wire groove is provided on the surface of the second wire roller (79), and wires (4) are arranged between the second wire rollers (79).

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