CN113120688A

CN113120688A - Protection mechanism for communication cable take-up and pay-off line

Info

Publication number: CN113120688A
Application number: CN202110423220.5A
Authority: CN
Inventors: 杨鑫
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-07-16

Abstract

The utility model relates to a communication cable technical field provides a communication cable is protection machanism for receive and releases line, including the installation piece, the installation piece is rectangular block-shaped, and the relative both sides of installation piece all set up the guiding mechanism who is used for wearing to establish the cable, the fixed plate is rectangular plate-like, and on the one end of fixed plate was fixed in the installation piece, first leading wheel was all installed to the relative both sides face that installation piece one end was kept away from to the fixed plate. The movable plate and the fixed plate are positioned on the same side of the mounting block and are rotatably connected to the mounting block through a pin shaft, and second guide wheels are mounted on two opposite side faces of the movable end of the movable plate. And the elastic restoring mechanism is arranged between the fixed plate and the movable plate so as to drive the fixed plate and the movable plate to be away from each other. The cable winding and unwinding device is simple in structure, convenient to use in cooperation with a winding and unwinding device, capable of protecting cables, not prone to damage in the winding and unwinding process and convenient to use.

Description

Protection mechanism for communication cable take-up and pay-off line

Technical Field

The application relates to the technical field of communication cables, in particular to a protection mechanism for a take-up and pay-off line of a communication cable.

Background

At present, a robot is required to be used for replacing manual operation on sites in many technical fields, the robot has the advantages that the robot can operate in places which are not suitable for people to go, such as dangerous environments with high radiation and high temperature, narrow areas and the like, however, power input is required during operation of the robot, and data needs to be transmitted between the robot and a control end in a two-way mode during operation, so that a connecting cable is required to be connected to the robot. The cable retracting device is used as an executing device for laying and storing communication cables, the operation performance of the cable retracting device directly influences automatic equipment (such as a robot), whether the automatic equipment can normally operate or not and the working range of the automatic equipment can be ensured, and the working stability and accessibility of the automatic equipment are improved by adopting an advanced cable retracting technology. The existing cable winding and unwinding technology is mainly divided into a remote cable winding and unwinding technology and a local cable winding and unwinding technology. The far-end cable retracting technology is only suitable for the operation conditions of simple working path, high cable tensile capacity, short cable length and the like. The on-site cable winding and unwinding technology is suitable for winding and unwinding fragile cables such as optical fibers and meets the working requirements of long working distance, complex path and the like. When adopting and receive and release the cable technique on the spot, in order to alleviate the load of cable to the robot, use the optical fiber cable that weight is lighter, however optical fiber cable is not enough on self toughness and intensity slightly, and its tensile strength is relatively poor, is easy to be damaged when the pulling force is great. The cable mechanism that receive and releases on spot who uses among the prior art is improper to the cable protection, in case the cable is dragged the damage at the in-process of receiving and releasing the cable, then can lead to the whole normal operation that can't carry out again of equipment, need change the cable again simultaneously, and maintenance cost is higher.

Disclosure of Invention

The application provides a communication cable is protection machanism for receive and releases line to improve above-mentioned problem.

The invention is particularly such that:

a protection mechanism for a communication cable take-up and pay-off line comprises

The installation piece, the installation piece is rectangular block-shaped, and the relative both sides of installation piece all set up the guiding mechanism who is used for wearing to establish the cable.

The fixed plate is rectangular plate-shaped, one end of the fixed plate is fixed on the mounting block, and first guide wheels are arranged on two opposite side faces, far away from one end of the mounting block, of the fixed plate.

The movable plate and the fixed plate are positioned on the same side of the mounting block and are rotatably connected to the mounting block through a pin shaft, and second guide wheels are mounted on two opposite side faces of the movable end of the movable plate.

And the elastic restoring mechanism is arranged between the fixed plate and the movable plate so as to drive the fixed plate and the movable plate to be away from each other.

And the limiting mechanism comprises a connecting rod, a gear, a first toothed plate, a transmission gear and a second toothed plate, wherein the gear is rotatably installed on the side face of the fixing plate, one end of the connecting rod and the side eccentric position of the gear are connected through a pin shaft, the other end of the connecting rod is hinged to the middle of the movable plate, the first toothed plate is slidably connected to the side face of the fixing plate, the transmission gear is rotatably installed on the side face of the fixing plate, the second toothed plate is parallel to the first toothed plate and is slidably connected with the fixing plate, two sides of the transmission gear are respectively meshed with the first toothed plate and the second toothed plate, and a positioning pin is installed at the tail end of the second toothed plate close to the gear and used for embedding the gear between tooth profiles and fixing the.

When the cable-winding device is used, the cable passes through the guide mechanism and the second guide wheel on the movable plate and then bypasses the first guide wheel.

The device also comprises a pressure sensor and a controller, wherein the pressure sensor is arranged at the tail end of the positioning pin and is electrically connected with the signal input end of the controller, and the signal output end of the controller is electrically connected with the motor of the automatic take-up and pay-off equipment.

Furthermore, the guide mechanism comprises a positioning sleeve and two positioning guide wheels, wherein a guide hole for the cable to pass through is formed in the positioning sleeve, and a threading gap is formed between the two positioning guide wheels for the cable to pass through.

Furthermore, the guide mechanism further comprises a first clamping block and a second clamping block, the first clamping block and the second clamping block are respectively and oppositely arranged on two sides of the cable, wherein the side faces of the first clamping block and the fixed block are fixedly connected, the side faces of the second clamping block and the fixed block are in sliding connection, the sliding direction of the second clamping block and the fixed block is along the direction away from or close to the first clamping block, a protruding block is arranged at one end, away from the gear, of the first toothed plate, the protruding block abuts against the bottom face of the first clamping block, and therefore the first clamping block is driven to slide.

Further, elastic recovery mechanism includes torsion spring and wears to locate pivot in the torsion spring, the both ends of pivot are fixed with the curb plate respectively, and two curb plates rigid coupling respectively in the relative both sides of fixed plate, and wherein, torsion spring's both ends are contradicted respectively in fixed plate and fly leaf.

Furthermore, set up the perforation that supplies the pivot to peg graft on the curb plate, the end of pivot passes corresponding perforation and the spiral cover has connect the retaining member, installs the setting element respectively in the pivot of torque spring both sides to fixed torque spring is at the epaxial axial position of pivot.

Furthermore, the tail end of the fixed plate is connected with a sliding block corresponding to the first guide wheel in a sliding mode, a wheel shaft of the first guide wheel is connected to the sliding block in a rotating mode, and a positioning mechanism used for fixing the position of the sliding block is further installed on the side face of the fixed plate.

Furthermore, the side of the fixed plate is provided with a sliding groove along the length direction, the sliding block is connected to the middle of the sliding groove in a sliding mode, a spring is installed in the sliding groove along the length direction, and the spring is fixedly connected with the sliding block.

Furthermore, positioning mechanism includes the rocker of swivelling joint in the fixed plate side, the rocker includes drive section, driven end and interlude, and wherein, the middle part of interlude rotates through the round pin axle with the side of fixed plate to be connected, is fixed with the locating pin pole on the driven end, the pinhole of pegging graft with the slider cooperation is seted up to the side of slider.

Furthermore, the movable end of fly leaf is fixed with the dead lever, and the pressure head of rubber system is installed to the end of dead lever, and wherein, when the fly leaf rotated, the pressure head can contradict the drive section of pushing down the rocker to make locating pin pole and pinhole separation.

Further, when the positioning pin rod is separated from the pin hole, the positioning pin is embedded between the tooth profiles of the gears to fix the gears.

The invention has the beneficial effects that:

the cable of the invention sequentially passes through the positioning sleeve and the two positioning guide wheels, passes through the space between the first clamping block and the second clamping block, then bypasses the second guide wheel on the movable plate, finally passes out after surrounding the first guide wheel, because the cable is long in length, when the cable is wound and unwound, and encounters an obstacle, the cable passes through the device, the tension of the cable is increased, the movable plate is driven to gradually approach the fixed plate, in the process, the connecting rod drives the gear to rotate, so that the first toothed plate is driven to slide along the side surface of the fixed plate, the transmission gear is driven to correspondingly rotate, the second toothed plate is finally driven to move towards one side close to the gear, the positioning pin at the tail end of the second toothed plate gradually approaches the gear until the positioning pin is inserted into the tooth profile of the gear, the position of the gear is finally fixed, at the moment, the movable plate cannot continuously approach, the cable is broken, and the protective effect is achieved.

According to the scheme provided by the invention, when the positioning pin is inserted between the tooth profiles of the gears so as to fix the positions of the gears, the pressure head at the tail end of the fixed rod extrudes the driving section of the rocker to drive the driving section to integrally rotate, so that the driven section is tilted upwards to drive the positioning pin rod to be separated from the pin hole on the sliding block, and the sliding block can slide along the sliding groove under the action of the cable, so that certain tension is absorbed, the buffering protection effect is achieved, and the cable can be further prevented from being damaged during winding and unwinding.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a perspective view of the overall construction of the device provided herein;

FIG. 2 is a schematic partial structural view of FIG. 1 provided herein;

FIG. 3 is a side view of the overall structure of the device of example 1 provided in the present application;

FIG. 4 is a side view of the overall structure of the device of example 1 in use as provided herein;

FIG. 5 is a side view of the overall structure of the device in example 2 provided in the present application;

FIG. 6 is an enlarged view at A of FIG. 5 as provided herein;

fig. 7 is a schematic structural diagram of a slider in the apparatus according to embodiment 2 provided in the present application.

Icon: the positioning device comprises a fixed plate 100, a movable plate 101, a mounting block 200, a positioning guide wheel 300, a first clamping block 400, a second clamping block 401, a positioning sleeve 500, a first toothed plate 600, a transmission gear 602, a second toothed plate 603, a bump 601, a positioning pin 604, a side plate 700, a rotating shaft 701, a locking member 702, a torsion spring 703, a positioning member 704, a connecting rod 800, a gear 801, a first guide wheel 900, a second guide wheel 901, a pin hole 902, a cable 11, a fixing rod 12, a pressure head 13, a rocker 14, a driving section 141, a driven end 142, a middle section 143, a spring 15, a sliding groove 16, a sliding block 17 and a positioning pin rod 18.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

referring to fig. 1, 2, 3 and 4, a protection mechanism for a communication cable take-up and pay-off line includes

The installation block 200, the installation block 200 is rectangular block-shaped, and the relative both sides of installation block 200 all set up the guiding mechanism who is used for wearing to establish cable 11.

The fixing plate 100 is a rectangular plate, one end of the fixing plate 100 is fixed on the mounting block 200, and the first guide wheels 900 are mounted on two opposite side surfaces of one end of the fixing plate 100, which is far away from the mounting block 200.

The movable plate 101 is rectangular plate-shaped, the movable plate 101 and the fixed plate 100 are located on the same side of the mounting block 200 and are rotatably connected to the mounting block 200 through a pin shaft, and second guide wheels 901 are mounted on two opposite side surfaces of a movable end of the movable plate 101.

An elastic restoring mechanism installed between the fixed plate 100 and the movable plate 101 to urge the fixed plate 100 and the movable plate 101 away from each other.

And the limiting mechanism comprises a connecting rod 800, a gear 801, a first toothed plate 600, a transmission gear 602 and a second toothed plate 603, wherein the gear 801 is rotatably installed on the side surface of the fixing plate 100, one end of the connecting rod 800 is connected with the side eccentric position of the gear 801 through a pin shaft, the other end of the connecting rod 800 is hinged to the middle part of the movable plate 101, the first toothed plate 600 is slidably connected to the side surface of the fixing plate 100, the transmission gear 602 is rotatably installed on the side surface of the fixing plate 100, the second toothed plate 603 is parallel to the first toothed plate 600, the second toothed plate 603 is slidably connected with the fixing plate 100, two sides of the transmission gear 602 are respectively meshed with the first toothed plate 600 and the second toothed plate 603, and a positioning pin 604 is installed at the tail end of the second toothed plate 603 close to the gear 801 and used for embedding the fixed gear.

In use, the cable 11 passes through the guide mechanism and the second guide wheel 901 on the flap 101 and then bypasses the first guide wheel 900.

The wire drawing machine further comprises a pressure sensor and a controller, wherein the pressure sensor is installed at the tail end of the positioning pin 604 and electrically connected with a signal input end of the controller, and a signal output end of the controller is electrically connected with a motor of the automatic wire drawing and releasing equipment. During operation, when the locating pin is abutted against the gear 801, the pressure sensor receives a signal and transmits the signal to the controller, and the controller controls the motor of the take-up and pay-off equipment to stop working, so that the continuous take-up and pay-off of the cable is avoided, and the cable is damaged.

Referring to fig. 1, fig. 3 and fig. 4, further, the guiding mechanism includes a positioning sleeve 500 and two positioning guide wheels 300, wherein a guide hole for the cable 11 to pass through is formed on the positioning sleeve 500, and a threading gap is formed between the two positioning guide wheels 300 for the cable 11 to pass through.

Referring to fig. 1, 3 and 4, further, the guiding mechanism further includes a first clamping block 400 and a second clamping block 401, the first clamping block 400 and the second clamping block 401 are respectively and oppositely disposed at two sides of the cable 11, wherein the first clamping block 400 is fixedly connected to a side surface of the fixing block 200, the second clamping block 401 is slidably connected to a side surface of the fixing block 200, a sliding direction of the second clamping block is along a direction away from or close to the first clamping block 400, one end of the first toothed plate 600 away from the gear 801 is provided with a protrusion 601, a bottom surface of the first clamping block 400 is an inclined surface, the protrusion 601 abuts against the bottom surface of the first clamping block 400 to drive the first clamping block 400 to slide, wherein adjacent sides of the first clamping block 400 and the second clamping block 401 are both provided with a threading slot, an elastic bushing is installed on an inner wall of the threading slot, the cable 11 passes between the first clamping block 400 and the second clamping block 401, when the cable 11 is close to the clamping block, the bush can the centre gripping cable, avoids hard contact, harms cable 11.

Referring to fig. 1 and 2, the elastic restoring mechanism includes a torsion spring 703 and a rotating shaft 701 passing through the torsion spring 703, two ends of the rotating shaft 701 are respectively fixed with a side plate 700, the two side plates 700 are respectively fixedly connected to two opposite sides of the fixed plate 100, wherein two ends of the torsion spring 703 respectively abut against the fixed plate 100 and the movable plate 101.

Referring to fig. 1, further, a through hole for inserting the rotating shaft 701 is formed in the side plate 700, the end of the rotating shaft 701 passes through the corresponding through hole and is spirally sleeved with a locking member 702, and positioning members 704 are respectively installed on the rotating shaft 701 at two sides of the torsion spring 703 to fix the axial position of the torsion spring 703 on the rotating shaft 701; so as to install the torsion spring 703 and facilitate the later maintenance and replacement of parts.

Example 2:

referring to fig. 5, fig. 6 and fig. 7, this embodiment is a further improvement on embodiment 1, in which a slide block 17 corresponding to the first guide wheel 900 is slidably connected to the end of the fixing plate 100, the wheel axle of the first guide wheel 900 is rotatably connected to the slide block 17, and a positioning mechanism for fixing the position of the slide block 17 is further installed on the side surface of the fixing plate 100.

Referring to fig. 6, further, a sliding groove 16 is formed in a side surface of the fixing plate 100 along a length direction thereof, the sliding block 17 is slidably connected to a middle portion of the sliding groove 16, a spring 15 is installed in the sliding groove 16 along the length direction thereof, and the spring 15 is fixedly connected with the sliding block 17; in order to play the guard action, have the effect of buffering, absorb certain cable internal tension, further improve the effect of protection cable.

Referring to fig. 6 and 7, further, the positioning mechanism includes a rocker 14 rotatably connected to the side surface of the fixed plate 100, the rocker 14 includes a driving section 141, a driven end 142 and a middle section 143, wherein the middle section 143 is rotatably connected to the side surface of the fixed plate 100 through a pin shaft, a positioning pin 18 is fixed on the driven end 142, and a pin hole 902 matched and inserted with the slider 17 is formed in the side surface of the slider 17.

Referring to fig. 5, as a further improvement of the above scheme, a fixed rod 12 is fixed at the movable end of the movable plate 101, and a rubber pressure head 13 is installed at the end of the fixed rod 12, wherein when the movable plate 101 rotates, the pressure head 13 can press against the driving section 141 of the down-pressing rocker 14, so that the positioning pin 18 is separated from the pin hole 902; the rocker 14 is conveniently driven to rotate, the positioning pin rod and the pin hole are driven to be separated, the structure is simple, and the operation is stable and reliable.

Further, when the positioning pin rod 18 is separated from the pin hole 902, the positioning pin 604 is embedded between the tooth profiles of the gear 801 to fix the gear 801; the synchronous working can achieve the effect of matching use.

When the cable winding and unwinding device is used, one end of a cable 11 is wound on external equipment for automatically winding and unwinding the cable, the cable 11 is driven by a motor, the cable 11 sequentially passes through a positioning sleeve 500 and two positioning guide wheels 300, passes through a space between a first clamping block 400 and a second clamping block 401, then passes through a second guide wheel 901 on a movable plate 101, finally passes through a first guide wheel 900 in a surrounding manner, and is difficult to avoid obstruction during winding and unwinding the cable due to the long length of the cable, the tension of the cable 11 on the device is increased, the movable plate 101 is driven to gradually approach to a fixed plate 100, in the process, a connecting rod 800 drives a gear 801 to rotate, so as to drive a first toothed plate 600 to slide along the side surface of the fixed plate 100, a transmission gear 602 to correspondingly rotate, and finally drive a second toothed plate 603 to move along the side surface of the fixed plate 100 to one side opposite to the movement direction of the first toothed plate, and a positioning pin 604, until the positioning pin 604 is inserted between the tooth profiles of the gear 801, so as to fix the position of the gear 801, at this time, the movable plate 801 cannot be continuously close to the fixed plate, so that the torsion value of the torsion spring 703 cannot be continuously increased, the tension is prevented from being continuously increased, the cable is prevented from being broken, and the protection effect is achieved;

in addition, according to the scheme provided in embodiment 2 of the present invention, when the positioning pin 604 is inserted between the tooth profiles of the gear 801 to fix the position of the gear 801, the pressure head 13 at the end of the fixing rod 12 presses the driving section 141 of the rocker 14 to drive the rocker to rotate integrally, so that the driven section 142 tilts upwards to drive the positioning pin rod 18 to separate from the pin hole 902 on the slider 17, and the slider can slide along the sliding groove under the action of the cable 11, thereby absorbing a certain tension, having a buffering protection effect, and further protecting the cable from being damaged during cable winding and unwinding.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A protection mechanism for a communication cable take-up and pay-off line is used for automatic take-up and pay-off equipment and is characterized by comprising

The cable fixing device comprises an installation block (200), wherein the installation block (200) is rectangular, and two opposite sides of the installation block (200) are respectively provided with a guide mechanism for penetrating a cable (11);

the fixing plate (100) is rectangular plate-shaped, one end of the fixing plate (100) is fixed on the mounting block (200), and the two opposite side surfaces of one end, far away from the mounting block (200), of the fixing plate (100) are provided with first guide wheels (900);

the movable plate (101) is rectangular plate-shaped, the movable plate (101) and the fixed plate (100) are located on the same side of the mounting block (200) and are rotatably connected to the mounting block (200) through a pin shaft, and second guide wheels (901) are mounted on two opposite side faces of the movable end of the movable plate (101); an elastic recovery mechanism capable of enabling the fixed plate (100) and the movable plate (101) to be away from each other is further arranged between the fixed plate (100) and the movable plate (101).

2. The protection mechanism for the take-up and pay-off of communication cables as claimed in claim 1, further comprising a limiting mechanism, wherein the limiting mechanism comprises a connecting rod (800), a gear (801), a first toothed plate (600), a transmission gear (602) and a second toothed plate (603), wherein the gear (801) is rotatably mounted on the side surface of the fixing plate (100), one end of the connecting rod (800) is connected with the side eccentric position of the gear (801) through a pin shaft, the other end of the connecting rod (800) is hinged with the middle part of the movable plate (101), the first toothed plate (600) is slidably connected to the side surface of the fixing plate (100), the transmission gear (602) is rotatably mounted on the side surface of the fixing plate (100), the second toothed plate (603) is parallel to the first toothed plate (600), the second toothed plate (603) is slidably connected with the fixing plate (100), and two sides of the transmission gear (602) are respectively engaged with the first toothed plate (600) and the second toothed plate (603), the end of the second toothed plate (603) close to the gear (801) is provided with a positioning pin (604) which is used for embedding between tooth profiles of the gear (801) and fixing the gear (801);

when in use, the cable (11) passes through the guide mechanism and the second guide wheel (901) on the movable plate (101) and then bypasses the first guide wheel (900);

the wire drawing machine further comprises a pressure sensor and a controller, wherein the pressure sensor is installed at the tail end of the positioning pin (604) and is electrically connected with a signal input end of the controller, and a signal output end of the controller is electrically connected with a motor of the automatic wire drawing and releasing equipment.

3. The protection mechanism for the take-up and pay-off of communication cables as claimed in claim 2, wherein the guiding mechanism comprises a positioning sleeve (500) and two positioning guide wheels (300), wherein a guiding hole for the cable (11) to pass through is formed on the positioning sleeve (500), and a threading gap is formed between the two positioning guide wheels (300) for the cable (11) to pass through.

4. The protection mechanism for the take-up and pay-off line of the communication cable as claimed in claim 3, wherein the guiding mechanism further comprises a first clamping block (400) and a second clamping block (401), the first clamping block (400) and the second clamping block (401) are respectively and oppositely disposed at two sides of the cable (11), wherein the first clamping block (400) is fixedly connected with a side surface of the fixed block (200), the second clamping block (401) is slidably connected with a side surface of the fixed block (200), a sliding direction of the sliding direction is along a direction away from or close to the first clamping block (400), one end of the first toothed plate (600) away from the gear (801) is provided with a projection (601), a bottom surface of the first clamping block (400) is an inclined surface, and the projection (601) abuts against the bottom surface of the first clamping block (400) to drive the first clamping block (400) to slide.

5. The protection mechanism for take-up and pay-off of communication cable as claimed in claim 2, wherein the elastic restoring mechanism comprises a torsion spring (703) and a rotating shaft (701) passing through the torsion spring (703), two ends of the rotating shaft (701) are respectively fixed with a side plate (700), the two side plates (700) are respectively fixed on two opposite sides of the fixed plate (100), wherein two ends of the torsion spring (703) respectively abut against the fixed plate (100) and the movable plate (101).

6. The protection mechanism for the take-up and pay-off of the communication cable as claimed in claim 5, wherein the side plate (700) is provided with a through hole for the insertion of the rotating shaft (701), the end of the rotating shaft (701) passes through the corresponding through hole and is spirally sleeved with a locking member (702), and the rotating shaft (701) at two sides of the torsion spring (703) is respectively provided with a positioning member (704) for fixing the axial position of the torsion spring (703) on the rotating shaft (701).

7. The protection mechanism for the take-up and pay-off line of the communication cable as claimed in claim 2, wherein the end of the fixing plate (100) is slidably connected with a sliding block (17) corresponding to the first guide wheel (900), the axle of the first guide wheel (900) is rotatably connected to the sliding block (17), and a positioning mechanism for fixing the position of the sliding block (17) is further installed on the side surface of the fixing plate (100).

8. The protection mechanism for the take-up and pay-off line of the communication cable as claimed in claim 7, wherein a sliding groove (16) is formed on the side surface of the fixing plate (100) along the length direction thereof, the sliding block (17) is slidably connected to the middle part of the sliding groove (16), a spring (15) is installed in the sliding groove (16) along the length direction thereof, and the spring (15) is fixedly connected with the sliding block (17).

9. The protection mechanism for the take-up and pay-off line of the communication cable as claimed in claim 7, wherein the positioning mechanism comprises a rocker (14) rotatably connected to the side surface of the fixed plate (100), the rocker (14) comprises a driving section (141), a driven end (142) and an intermediate section (143), the intermediate section (143) is rotatably connected to the side surface of the fixed plate (100) through a pin shaft, a positioning pin rod (18) is fixed on the driven end (142), and a pin hole (902) matched and inserted with the sliding block (17) is formed in the side surface of the sliding block (17).

10. The protection mechanism for the take-up and pay-off line of the communication cable as claimed in claim 9, wherein the movable end of the movable plate (101) is fixed with a fixed rod (12), and a rubber pressure head (13) is installed at the end of the fixed rod (12), wherein when the movable plate (101) rotates, the pressure head (13) can press against the driving section (141) of the down-pressing rocker (14) to separate the positioning pin rod (18) from the pin hole (902); when the positioning pin rod (18) is separated from the pin hole (902), the positioning pin (604) is embedded between the tooth profiles of the gear (801) to fix the gear (801).