Optical fiber cable tensile deformation detection equipment

Abstract

The invention relates to the technical field of optical fiber cable detection, in particular to optical fiber cable tensile deformation detection equipment which comprises a base and further comprises a rotary carrying structure connected with the base. The two groups of cable wrapping limiting structures are mounted on the rotary carrying structure; the stretching detection structure is connected with the base, the stretching detection structure comprises a control module connected with the base, a material receiving box is installed on the base, and a peeling stretching mechanism is installed on the material receiving box. According to the invention, through cooperation of the rotary carrying structure and the cable wrapping limiting structure, optical cables at two ends of one roll of optical fiber cable are detected at the same time, and a worker takes or installs the other roll of optical fiber cable during detection, so that the working efficiency of the optical fiber cable detection device is improved; and the stretching detection structure automatically completes peeling and stretching on the optical fiber cable, so that manpower is saved, and the applicability of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber cable detection, in particular to an optical fiber cable tensile deformation detection device. Background Art

[0002] Optical fiber is short for optical fiber, which is a fiber made of glass or plastic that can be used as a light transmission tool, while optical cable is manufactured to meet optical, mechanical or environmental performance specifications. It is a communication cable assembly that uses one or more optical fibers placed in a sheath as a transmission medium and can be used individually or in groups. After the production of optical fiber cables, various data of optical fiber cables need to be tested, especially optical fiber cables will be subjected to tension during use, which will cause the optical fiber cables to deform. Poor tensile strength will affect the quality of optical fiber cables.

[0003] Traditional optical fiber cable tensile testing often involves cutting a section from a roll of optical fiber cable, and then using equipment to externally clamp and linearly pull the cut optical fiber cable, while personnel observe. Traditional optical fiber cable tensile deformation testing equipment often requires personnel to manually cut and install optical fiber cables. Only after one optical fiber cable has been tested can the next set of optical fiber cables be installed. If a separate tensile deformation test is required on the optical fiber in the cable, additional manual stripping operations are required to remove the outer sheath of the optical fiber, and then re-clamping operations are performed, which is inefficient and has low applicability. Summary of the invention

[0004] The object of the present invention is to provide an optical fiber cable tensile deformation detection device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: An optical fiber cable tensile deformation detection device comprises a base and also comprises: A rotating supporting structure connected to the base; Two sets of cable winding limit structures installed on the rotating supporting structure, the cable winding limit structures comprising a variable diameter winding portion fixedly connected to the rotating supporting structure, the variable diameter winding portion being connected to two sets of variable position wire end fixing portions; A stretching detection structure connected to a base, the stretching detection structure includes a control module connected to the base, a material receiving box is installed on the base, a peeling and stretching mechanism is installed on the material receiving box, the peeling and stretching mechanism includes a linear moving part installed on the material receiving box, two sets of rotating stripping parts are installed on the linear moving part, the rotating stripping part cuts off the outer coating sheath of the optical fiber cable by rotating cutting, the linear moving part drives the rotating stripping part away from the fixed part of the displacement line end, so that the rotating stripping part presses the cut coating sheath on the optical fiber cable away from the optical fiber cable, the linear moving part is connected to a clamping part, and the clamping part is communicatively connected to the control module.

[0006] As a further improvement of the present invention: the rotating supporting structure includes a first motor fixedly connected to the base, the output shaft of the first motor is fixedly connected to a turntable, the turntable is rotatably connected to the base, and the turntable is connected to the variable diameter winding part.

[0007] As a further improvement scheme of the present invention: the variable diameter winding part includes a support table fixedly connected to the turntable, the support table is fixedly connected to the position changing wire end fixing part, the turntable is fixedly connected to a second motor, the output shaft of the second motor is fixedly connected to a rotating frame, the rotating frame is rotatably connected to the support table, multiple groups of first hinged plates are hinged on the rotating frame, the first hinged plates are hinged to a wire support frame, the materials of the wire support frame and the support table are both insulating materials, and the wire support frame is slidably connected to a groove rail frame fixedly connected to the support table.

[0008] As a further improvement scheme of the present invention: the position-changing wire end fixing part comprises a frame fixedly connected to the support platform, the frame is fixedly connected to multiple frame frames, the multiple frame frames are hinged to multiple groups of wire crimping frames, the wire crimping frames are fixedly connected to a protruding shaft, the frame is rotatably connected to a twist handle, the twist handle is fixedly connected to a first screw, the first screw is threadedly connected to a driving frame slidably connected to the frame, the driving frame is fixedly connected to a rectangular frame slidably connected to the protruding shaft, the frame is fixedly connected to a first active telescopic frame, the moving end of the first active telescopic frame is fixedly connected to a concave frame, the concave frame is fixedly connected to two groups of second active telescopic frames arranged symmetrically, the moving end of one group of the second active telescopic frames is fixedly connected to an arc bar, and the moving end of the other group of the second active telescopic frames is fixedly connected to a fork frame.

[0009] As a further improvement of the present invention: the linear moving part includes a machine base fixedly connected to a material receiving box, the machine base is fixedly connected to a first active telescopic rod, the moving end of the first active telescopic rod is fixedly connected to a sliding frame, the material receiving box is fixedly connected to multiple groups of dovetail bars, the dovetail bars are slidably connected to the sliding frame, the sliding frame is connected to the rotating peeling part, and the sliding frame is connected to the clamping part.

[0010] As a further improvement of the present invention: the rotating peeling part includes a base fixedly connected to the sliding frame, the base is fixedly connected to the third motor, the output shaft of the third motor is fixedly connected to a gear, the gear is meshingly connected to a ring gear, the ring gear is coaxially fixedly connected to a ring body rotatably connected to the base, two groups of second active telescopic rods are symmetrically installed on the ring body, the movable end of the second active telescopic rod is fixedly connected to a joint, and the joint is movably connected to a cutter.

[0011] As a further improvement of the present invention: the clamping part includes a third active telescopic frame fixedly connected to the sliding frame, the moving end of the third active telescopic frame is fixedly connected to a double-head frame, the double-head frame is hinged with two groups of second hinged plates, the second hinged plates are hinged with two groups of parallel frames, the two groups of parallel frames are slidably connected to a vertical frame fixedly connected to the sliding frame, and the parallel frame is fixedly connected to a pressure sensing plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: A roll of optical fiber cable is placed on the variable diameter winding part, and two sets of variable position line end fixing parts are used to fix the two ends of the optical fiber cable, and then the rotating supporting structure is used to rotate and replace the cable winding limit structure, and personnel install the optical fiber cable on the other set of cable winding limit structures. If it is necessary to perform a separate stretch test on the optical fiber in the optical cable, the linear moving part drives the rotating stripping part to approach the end of the optical fiber cable, and then the rotating stripping part performs rotational cutting on the coating sheath of the optical fiber cable, and then the linear moving part drives the rotating stripping part away from the optical fiber cable, so that the rotating stripping part peels off the cut optical fiber cable coating sheath from the optical fiber, and the cut coating sheath falls into the receiving box, and then the clamping part clamps the exposed optical fiber of the optical fiber cable, and the control module sends a control signal to the clamping part. The clamping part clamps the optical fiber, and the linear moving part drives the clamping part to move, so that the optical fiber with the coating sheath removed is stretched for a stretching test operation, and then the stretching test structure is reset, so that the stretching test structure and the optical fiber cable are separated from each other, and then the rotating supporting structure rotates and replaces the cable winding limit structure, so that the stretching test structure performs a test operation on the next group of optical fiber cables, and personnel remove the optical fiber cables that have been tested when they are not in use. If there is no need to perform a separate stretching test on the optical fiber in the optical cable, the rotating stripping part does not perform a rotational cutting operation on the coating sheath of the optical fiber cable, so that the clamping part clamps the unstripped optical fiber cable, and then the linear moving part drives the clamping part to move, so that the optical fiber cable is stretched for a stretching test operation. The present invention cooperates with the rotating supporting structure and the cable winding limit structure so that the optical cables at both ends of a roll of optical fiber cable can be detected simultaneously, during which time personnel can take or install another roll of optical fiber cable, thereby improving the work efficiency of the present invention. In addition, the stretching detection structure automatically completes the stripping and stretching of the optical fiber cable, which saves manpower and improves the applicability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the cable winding limiting structure in the present invention; Figure 3 It is a structural schematic diagram of the cable winding limiting structure in the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the fixed part of the variable position line end in the present invention; Figure 5 It is a schematic diagram of the structure of the fixed part of the variable position line end in the present invention; Figure 6 For the present invention Figure 4 A local enlarged schematic diagram of the middle A; Figure 7 It is a schematic diagram of the three-dimensional structure of the stretching detection structure in the present invention; Figure 8 It is a structural schematic diagram of the stretching detection structure in the present invention; Fig. 9 For the present invention Figure 7 A local enlarged schematic diagram of point B in the middle.

[0014] In the figure: 1. base; 2. control panel; 3. rotating support structure; 4. cable winding limit structure; 5. variable diameter winding part; 6. variable position wire end fixing part; 7. stretching detection structure; 8. control module; 9. material receiving box; 10. peeling and stretching mechanism; 11. linear moving part; 12. rotating peeling part; 13. clamping part; 14. first motor; 15. turntable; 16. support table; 17. second motor; 18. rotating frame; 19. first hinged plate; 20. wire support frame; 21. groove rail frame; 22. frame; 23. multi-frame; 24. wire pressing frame; 25. third motor; 26. Protruding shaft; 27, twist handle; 28, first screw rod; 29, driving frame; 30, rectangular frame; 31, first active telescopic frame; 32, concave frame; 33, second active telescopic frame; 34, arc strip; 35, fork frame; 36, machine base; 37, first active telescopic rod; 38, sliding frame; 39, dovetail strip; 40, base; 41, gear; 42, gear ring; 43, ring body; 44, second active telescopic rod; 45, joint; 46, cutter; 47, third active telescopic frame; 48, double-head frame; 49, second hinged plate; 50, parallel frame; 51, vertical frame; 52, pressure sensing plate. DETAILED DESCRIPTION

[0015] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0016] Example 1, see Figures 1 to 9 As shown, an optical fiber cable tensile deformation detection device includes a base 1, the base 1 is fixedly connected to a control panel 2, and also includes: A rotating supporting structure 3 connected to the base 1; Two sets of cable winding limiting structures 4 installed on the rotating supporting structure 3, the cable winding limiting structure 4 includes a variable diameter winding portion 5 fixedly connected to the rotating supporting structure 3, and the variable diameter winding portion 5 is connected to two sets of variable position wire end fixing portions 6; A stretching detection structure 7 connected to the base 1, the stretching detection structure 7 includes a control module 8 connected to the base 1, a material receiving box 9 is installed on the base 1, a peeling and stretching mechanism 10 is installed on the material receiving box 9, the peeling and stretching mechanism 10 includes a linear moving part 11 installed on the material receiving box 9, two sets of rotating stripping parts 12 are installed on the linear moving part 11, the rotating stripping part 12 cuts off the outer coating sheath of the optical fiber cable by rotating cutting, the linear moving part 11 drives the rotating stripping part 12 away from the position-changing line end fixing part 6, so that the rotating stripping part 12 presses the cut coating sheath on the optical fiber cable away from the optical fiber cable, the linear moving part 11 is connected to a clamping part 13, and the clamping part 13 is communicatively connected to the control module 8.

[0017] A roll of optical fiber cable is placed on the variable diameter winding part 5, and two sets of variable position line end fixing parts 6 are used to fix the two ends of the optical fiber cable, and then the rotating supporting structure 3 is used to rotate and change the cable winding limit structure 4, and the personnel install the optical fiber cable on the other set of cable winding limit structures 4. If it is necessary to perform a separate tensile test on the optical fiber in the optical cable, the linear moving part 11 drives the rotating stripping part 12 to approach the end of the optical fiber cable, and then the rotating stripping part 12 performs rotational cutting on the coating sheath of the optical fiber cable, and then the linear moving part 11 drives the rotating stripping part 12 away from the optical fiber cable, so that the rotating stripping part 12 peels off the cut optical fiber cable coating sheath from the optical fiber, and the cut coating sheath falls into the receiving box 9, and then the clamping part 13 clamps the exposed optical fiber of the optical fiber cable, and the control module 8 sends a control signal to the clamping part 13 The number causes the clamping part 13 to clamp the optical fiber, and the linear moving part 11 drives the clamping part 13 to move, so that the optical fiber with the coating sheath removed is stretched for a stretching test operation, and then the stretching test structure 7 is reset, so that the stretching test structure 7 and the optical fiber cable are separated from each other, and then the rotating supporting structure 3 rotates and replaces the cable winding limit structure 4, so that the stretching test structure 7 performs a test operation on the next group of optical fiber cables, and the personnel remove the optical fiber cables that have been tested when they are not in use. If there is no need to perform a separate stretching test on the optical fiber in the optical cable, the rotating stripping part 12 does not perform a rotational cutting operation on the coating sheath of the optical fiber cable, so that the clamping part 13 clamps the unstripped optical fiber cable, and then the linear moving part 11 drives the clamping part 13 to move, so that the optical fiber cable is stretched for a stretching test operation. The present invention cooperates with the rotating supporting structure 3 and the cable winding limit structure 4 so that the optical cables at both ends of a roll of optical fiber cable can be detected simultaneously, during which time personnel can take or install the other roll of optical fiber cable, thereby improving the work efficiency of the present invention. In addition, since the stretching detection structure 7 automatically completes the stripping and stretching of the optical fiber cable, manpower is saved and the applicability of the present invention is improved.

[0018] In one case of this embodiment, the rotating supporting structure 3 includes a first motor 14 fixedly connected to the base 1, and the output shaft of the first motor 14 is fixedly connected to a turntable 15, the turntable 15 is rotatably connected to the base 1, and the turntable 15 is connected to the variable diameter winding part 5. The first motor 14 drives the turntable 15 to rotate, and the turntable 15 rotates to make the two groups of variable diameter winding parts 5 perform transposition operations.

[0019] In one case of the present embodiment, the variable diameter winding part 5 includes a support platform 16 fixedly connected to the turntable 15, the support platform 16 is fixedly connected to the variable position line end fixing part 6, the turntable 15 is fixedly connected to a second motor 17, the output shaft of the second motor 17 is fixedly connected to a rotating frame 18, the rotating frame 18 is rotatably connected to the support platform 16, a plurality of groups of first hinge plates 19 are hinged on the rotating frame 18, the first hinge plates 19 are hinged to a wire support frame 20, the materials of the wire support frame 20 and the support platform 16 are both insulating materials, and the wire support frame 20 is slidably connected to a groove rail frame 21 fixedly connected to the support platform 16. The second motor 17 drives the rotating frame 18 to rotate, and the rotating rotating frame 18 pulls the wire support frame 20 to move through the first hinge plate 19, so that the wire support frame 20 slides along the groove rail frame 21, thereby synchronously adjusting the position of the wire support frame 20, so that the variable diameter winding part 5 can limit the size of the rolled optical fiber cable.

[0020] In one case of the present embodiment, the variable position line end fixing part 6 includes a frame 22 fixedly connected to the support platform 16, the frame 22 is fixedly connected to a plurality of frame frames 23, the plurality of frame frames 23 are hinged to a plurality of groups of wire crimping frames 24, the wire crimping frames 24 are fixedly connected to a protruding shaft 26, the frame 22 is rotatably connected to a twist handle 27, the twist handle 27 is fixedly connected to a first screw 28, the first screw 28 is threadedly connected to a driving frame 29 slidably connected to the frame 22, the driving frame 29 is fixedly connected to a plurality of groups of rectangular frames 30, the rectangular frames 30 are slidably connected to the protruding shaft 26, the frame 22 is fixedly connected to a first active telescopic frame 31, the moving end of the first active telescopic frame 31 is fixedly connected to a concave frame 32, the concave frame 32 is fixedly connected to two groups of second active telescopic frames 33 arranged symmetrically, the moving end of one group of the second active telescopic frames 33 is fixedly connected to an arc bar 34, and the moving end of the other group of the second active telescopic frames 33 is fixedly connected to a fork frame 35. By rotating the twist handle 27, the first screw 28 is rotated, and the driving frame 29 is moved under the drive of the first screw 28. The driving frame 29 drives the rectangular frame 30 to move, so that the rectangular frame 30 drives the protruding shaft 26 to move, and the protruding shaft 26 drives the wire crimping frame 24 to rotate, so that the wire crimping frame 24 presses the optical fiber cable. The second active telescopic frame 33 drives the fork frame 35 and the arc bar 34 to move, so that the fork frame 35 and the arc bar 34 clamp the end of the optical fiber cable in a staggered manner. When the end of the optical fiber cable needs to be exposed, the two groups of second active telescopic frames 33 respectively drive the fork frame 35 and the arc bar 34 to move, so that the fork frame 35 and the arc bar 34 are away from each other, and the first active telescopic frame 31 is retracted, so that the end of the optical fiber cable is in an unclamped state, which is convenient for the optical fiber cable end to be cut or clamped.

[0021] In one case of this embodiment, the linear moving part 11 includes a base 36 fixedly connected to the material receiving box 9, the base 36 is fixedly connected to a first active telescopic rod 37, the moving end of the first active telescopic rod 37 is fixedly connected to a sliding frame 38, the material receiving box 9 is fixedly connected to multiple groups of dovetail bars 39, the dovetail bars 39 are slidably connected to the sliding frame 38, the sliding frame 38 is connected to the rotating peeling part 12, and the sliding frame 38 is connected to the clamping part 13. The first active telescopic rod 37 is used to drive the sliding frame 38 to move, so that the sliding frame 38 moves along the dovetail bars 39, and the sliding frame 38 is used to drive the rotating peeling part 12 and the clamping part 13 to move.

[0022] In one case of the present embodiment, the rotating peeling part 12 includes a base 40 fixedly connected to the sliding frame 38, the base 40 is fixedly connected to the third motor 25, the output shaft of the third motor 25 is fixedly connected to the gear 41, the gear 41 is meshingly connected to the ring gear 42, the ring gear 42 is coaxially fixedly connected to the ring body 43 rotatably connected to the base 40, two groups of second active telescopic rods 44 are symmetrically installed on the ring body 43, the movable end of the second active telescopic rod 44 is fixedly connected to the joint 45, and the joint 45 is movably connected to the cutter 46. As the sliding frame 38 drives the rotating stripping part 12 to approach the end of the optical fiber cable, the first active telescopic frame 31 retracts and the second active telescopic frame 33 drives the fork frame 35 and the arc bar 34 to move away from each other to loosen the optical fiber cable, so that the rotating stripping part 12 contacts the released end of the optical fiber cable, and then the rotating stripping part 12 performs cutting operations and stripping operations of the coating sheath. Specifically, the third motor 25 drives the gear 41 to rotate, so that the ring gear 42 drives the ring body 43 to rotate, thereby adjusting the position of the second active telescopic rod 44. The second active telescopic rod 44 drives the joint 45 to move, so that the cutter 46 is inserted into the coating sheath of the optical fiber cable, so that the cutter 46 rotates to cut the coating sheath, and then as the sliding frame 38 moves away from the optical fiber cable, the cutter 46 presses the coating sheath away from the optical fiber cable to expose the optical fiber in the cable.

[0023] Embodiment 2, based on embodiment 1, refer to Figure 7 and Figure 8 The clamping part 13 includes a third active telescopic frame 47 fixedly connected to the sliding frame 38, and a double-head frame 48 is fixedly connected to the moving end of the third active telescopic frame 47. The double-head frame 48 is hinged with two sets of second hinged plates 49, and the second hinged plates 49 are hinged with two sets of parallel frames 50. The two sets of parallel frames 50 are slidably connected to a vertical frame 51 fixedly connected to the sliding frame 38. The parallel frame 50 is fixedly connected with a pressure sensing plate 52, and the pressure sensing plate 52 is communicatively connected to the control module 8. The third active telescopic frame 47 drives the double-head frame 48 to move, and the double-head frame 48 drives the parallel frame 50 to move along the vertical frame 51 by driving the second hinged plate 49, thereby adjusting the position of the pressure sensing plate 52, and the pressure sensing plate 52 is used to perform a clamping operation on the optical fiber cable.

[0024] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. An optical fiber cable tensile deformation detection device, comprising a base, characterized in that: Also includes: A rotating supporting structure connected to the base; Two sets of cable winding limit structures installed on the rotating supporting structure, the cable winding limit structures comprising a variable diameter winding portion fixedly connected to the rotating supporting structure, the variable diameter winding portion being connected to two sets of variable position wire end fixing portions; A stretching detection structure connected to a base, the stretching detection structure includes a control module connected to the base, a material receiving box is installed on the base, a peeling and stretching mechanism is installed on the material receiving box, the peeling and stretching mechanism includes a linear moving part installed on the material receiving box, two sets of rotating stripping parts are installed on the linear moving part, the rotating stripping part cuts off the outer coating sheath of the optical fiber cable by rotating cutting, the linear moving part drives the rotating stripping part away from the fixed part of the displacement line end, so that the rotating stripping part presses the cut coating sheath on the optical fiber cable away from the optical fiber cable, the linear moving part is connected to a clamping part, and the clamping part is communicatively connected to the control module.

2. The optical fiber cable tensile deformation detection device according to claim 1, characterized in that: The rotating supporting structure comprises a first motor fixedly connected to the base, the output shaft of the first motor is fixedly connected to a turntable, the turntable is rotatably connected to the base, and the turntable is connected to the variable diameter winding part.

3. The optical fiber cable tensile deformation detection device according to claim 2, characterized in that: The variable diameter winding part includes a support table fixedly connected to a turntable, the support table is fixedly connected to a variable diameter wire end fixing part, the turntable is fixedly connected to a second motor, the output shaft of the second motor is fixedly connected to a rotating frame, the rotating frame is rotatably connected to the support table, a plurality of first hinged plates are hinged on the rotating frame, the first hinged plates are hinged to a wire support frame, the materials of the wire support frame and the support table are both insulating materials, and the wire support frame is slidably connected to a groove rail frame fixedly connected to the support table.

4. The optical fiber cable tensile deformation detection device according to claim 3, characterized in that: The fixed part of the displacement line end includes a frame fixedly connected to the support platform, the frame is fixedly connected to multiple frame frames, the multiple frame frames are hinged to multiple groups of wire crimping frames, the wire crimping frame is fixedly connected to a protruding shaft, the frame is rotatably connected to a twist handle, the twist handle is fixedly connected to a first screw, the first screw is threadedly connected to a driving frame slidably connected to the frame, the driving frame is fixedly connected to a rectangular frame slidably connected to the protruding shaft, the frame is fixedly connected to a first active telescopic frame, the moving end of the first active telescopic frame is fixedly connected to a concave frame, the concave frame is fixedly connected to two groups of second active telescopic frames arranged symmetrically, one group of the second active telescopic frames is fixedly connected to a curved bar at its moving end, and the other group of the second active telescopic frames is fixedly connected to a fork frame at its moving end.

5. The optical fiber cable tensile deformation detection device according to claim 1, characterized in that: The linear moving part includes a machine base fixedly connected to a material receiving box, the machine base is fixedly connected to a first active telescopic rod, the moving end of the first active telescopic rod is fixedly connected to a sliding frame, the material receiving box is fixedly connected to multiple groups of dovetail bars, the dovetail bars are slidably connected to the sliding frame, the sliding frame is connected to the rotating peeling part, and the sliding frame is connected to the clamping part.

6. The optical fiber cable tensile deformation detection device according to claim 5, characterized in that: The rotating peeling part includes a base fixedly connected to the sliding frame, the base is fixedly connected to a third motor, the output shaft of the third motor is fixedly connected to a gear, the gear is meshingly connected to a gear ring, the gear ring is coaxially fixedly connected to a ring body rotatably connected to the base, two groups of second active telescopic rods are symmetrically installed on the ring body, the movable end of the second active telescopic rod is fixedly connected to a joint, and the joint is movably connected to a cutter.

7. The optical fiber cable tensile deformation detection device according to claim 6, characterized in that: The clamping part includes a third active telescopic frame fixedly connected to the sliding frame, the moving end of the third active telescopic frame is fixedly connected to a double-head frame, the double-head frame is hinged with two groups of second hinged plates, the second hinged plates are hinged with two groups of parallel frames, the two groups of parallel frames are slidably connected together with a vertical frame fixedly connected to the sliding frame, and the parallel frame is fixedly connected with a pressure sensing plate.

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