Self-maintenance fire fighting device

Abstract

The invention discloses a self-maintenance fire-fighting device, which relates to the technical field of fire-fighting maintenance and comprises a protection frame. And the lamp board is located in the protection frame, and the lamp board is movably arranged in the protection frame and used for sliding buffering, so that direct damage to the lamp board is reduced. And the cleaning plate is located in the protection frame, and the cleaning plate is in sliding friction with the lamp board and used for conducting sliding cleaning on the lamp board. And the clamping assembly comprises a fixed part arranged in the protection frame, a clamping part rotationally arranged on the fixed part and a moving part arranged on the fixed part in a sliding mode, and the clamping assembly is used for pulling the clamping part to rotate through movement of the moving part so as to clamp and limit the lamp board. And the pushing assembly is arranged on the lamp board and used for pushing the clamping assembly to clamp the lamp board along with movement of the lamp board. When the lamp board is subjected to external force, the lamp board slides in the protection frame, force unloading can be conducted, the lamp board is protected, and meanwhile dust on the lamp board can be cleaned.

Description

Technical Field

[0001] This invention relates to the field of fire protection maintenance technology, and in particular to a self-maintaining fire protection device. Background Technology

[0002] In modern buildings and industrial facilities, the reliability of fire protection systems is of paramount importance, directly impacting personnel safety and property protection. With technological advancements, fire protection system designs have become increasingly complex, demanding higher levels of maintenance expertise. Traditional fire protection systems rely on regular manual inspections and maintenance, which is not only inefficient but also prone to overlooking critical maintenance steps, leading to equipment malfunctions during emergencies.

[0003] The existing fire safety indicator signs are installed on the wall. Pedestrians passing by and waiting for the elevator may easily kick the fire safety indicator signs, causing damage or dirt to obscure the signs. Therefore, the signs need to be protected and cleaned. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that existing fire safety indicator signs are easily damaged or covered with dirt, which obscures the signs.

[0005] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a self-maintaining fire-fighting device, which includes a protective frame.

[0006] The light sign is located within the protective frame and is movably positioned within the protective frame for sliding buffering, reducing direct damage to the light sign.

[0007] A cleaning plate is located within the protective frame and slides against the light sign to clean it.

[0008] The clamping assembly includes a fixed part disposed within the protective frame, a clamping part rotatably disposed on the fixed part, and a movable part slidably disposed on the fixed part, for pulling the clamping part to rotate by moving the movable part, thereby clamping and limiting the position of the signboard.

[0009] A pushing component is disposed on the light sign and is used to push the clamping component to clamp the light sign as the light sign moves.

[0010] In a preferred embodiment of the self-maintaining fire-fighting device of the present invention: the inner wall of the protective frame is provided with a sliding groove for guiding the light sign, the inner wall of the protective frame is provided with a guide groove for guiding the cleaning plate, the protective frame is provided with an installation opening, the guide groove is provided in two sets, and the two sets of guide grooves are close to each other at one end and are far away from the opening of the protective frame, and the two sets of guide grooves are far away from each other at one end and are close to the opening of the protective frame.

[0011] In a preferred embodiment of the self-maintaining fire-fighting device of the present invention: the signboard includes a light plate slidably disposed in the slide groove, and a push column disposed on the back of the light plate.

[0012] In a preferred embodiment of the self-maintenance fire-fighting device of the present invention: the pushing column includes a sliding frame disposed on the lamp plate and a pushing column body slidably connected to the inner wall of the sliding frame.

[0013] In a preferred embodiment of the self-maintenance fire-fighting device of the present invention: the cleaning plate includes a cleaning strip slidably connected to the guide groove, and a spring disposed on the cleaning strip and connected to the protective frame, the spring being inclined.

[0014] In a preferred embodiment of the self-maintaining fire-fighting device of the present invention: the fixing part includes a fixing plate disposed on the inner wall of the protective frame, and an mounting plate disposed on the fixing plate and connected to the bottom surface of the fixing plate, the mounting plate and the fixing plate forming an L-shape.

[0015] In a preferred embodiment of the self-maintaining fire-fighting device of the present invention: the clamping part includes a rotating shaft rotatably disposed on the fixed plate, a swing plate disposed on the rotating shaft, and a clamping plate disposed at the end of the swing plate away from the rotating shaft.

[0016] In a preferred embodiment of the self-maintenance fire-fighting device of the present invention: the moving part includes a sliding column slidably disposed on the mounting plate, a connecting rope disposed on the sliding column and connected to the swing plate, and a rotating cylinder sleeved on the sliding column, and the mounting plate is provided with an inclined moving groove.

[0017] In a preferred embodiment of the self-maintaining fire-fighting device of the present invention: the pushing component includes a fixed seat disposed on the pushing column and a push plate oscillatingly disposed on the fixed seat, the fixed seat and the sliding frame being distributed side by side.

[0018] In a preferred embodiment of the self-maintaining fire-fighting device of the present invention: the push plate is provided with an opening groove in the middle, the connecting rope is connected to the middle of the sliding column, the rotating cylinder includes two sleeves, both sleeves are sleeved on the sliding column, the two sleeves are respectively located on both sides of the connecting rope, and the connecting rope is located at the opening groove.

[0019] The beneficial effects of this invention are as follows: When subjected to external force, the light board slides within the protective frame, which can relieve the force and protect the light board. At the same time, the sliding of the light board will drive the pushing component to move. The pushing component pushes the moving part to slide, and the moving part pulls the clamping part to swing, which facilitates the rotation of the clamping part and avoids obstructing the movement of the light board. At the same time, the clamping part, after swinging and resetting, can limit the movement of the light board. After the external force is removed, it can ensure the stability of the light board's position, thereby allowing the cleaning plate to thoroughly clean the entire light board. When the cleaning plate thoroughly cleans the light board, it moves to the middle of the light board, thereby allowing the clamping part to release the limitation on the light board. This allows both the cleaning plate and the light board to reset, providing buffer protection for the light board while cleaning the dust on the light board. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein:

[0021] Figure 1 A schematic diagram of the overall structure of the present invention is shown;

[0022] Figure 2 A schematic diagram of the structure of the present invention is shown;

[0023] Figure 3 A rear-view structural schematic diagram of the present invention is shown;

[0024] Figure 4 A partial cross-sectional view of the protective frame in this invention is shown;

[0025] Figure 5 A schematic diagram of the cleaning plate in this invention is shown;

[0026] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle;

[0027] Figure 7 A schematic diagram of the structure of the actuating component in this invention is shown;

[0028] Figure 8 A partial cross-sectional view of the locking assembly in this invention is shown. Figure 1 ;

[0029] Figure 9 for Figure 8 A magnified view of a portion of point B in the middle;

[0030] Figure 10 A partial cross-sectional view of the locking assembly in this invention is shown. Figure 2 ;

[0031] Figure 11 Figure 10 A magnified view of a portion of point C. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0033] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0034] Reference Figure 1-4 This embodiment provides a self-maintaining fire-fighting device, including a protective frame 1.

[0035] Light sign 2 is located inside the protective frame 1. The light sign 2 is movably set inside the protective frame 1 for sliding buffering, reducing direct damage to the light sign 2.

[0036] Cleaning plate 3 is located inside the protective frame 1. Cleaning plate 3 slides and rubs against light sign 2 to clean light sign 2.

[0037] The clamping assembly 4 includes a fixed part 41 disposed within the protective frame 1, a clamping part 42 rotatably disposed on the fixed part 41, and a movable part 43 slidably disposed on the fixed part 41. The movable part 43 is used to pull the clamping part 42 to rotate, thereby clamping and limiting the light sign 2.

[0038] The pushing component 5, mounted on the light sign 2, is used to push the clamping component 4 to clamp the light sign 2 as it moves. When subjected to external force, the light sign 2 slides within the protective frame 1. Simultaneously, the sliding of the light sign 2 causes the pushing component 5 to move, which in turn drives the clamping component 4 to operate, stabilizing the position of the light sign 2. This allows the cleaning plate 3 to thoroughly clean the entire light sign 2. When the cleaning plate 3 thoroughly cleans the light sign 2, it moves to the center of the light sign 2, thereby releasing the limiting position on the light sign 2 and allowing both the cleaning plate 3 and the light sign 2 to reset.

[0039] In summary, when subjected to external force, the light sign 2 slides within the protective frame 1, which can relieve the force and protect the light sign 2. At the same time, the sliding of the light sign 2 will drive the pushing component 5 to move, which in turn drives the moving part 43 to slide. The moving part 43 pulls the locking part 42 to swing, which facilitates the rotation of the locking part 42 and avoids obstructing the movement of the light sign 2. After swinging, the locking part 42 resets and can limit the movement of the light sign 2. After the external force is removed, it can ensure the stability of the position of the light sign 2, so that the cleaning plate 3 can thoroughly clean the entire light sign 2. When the cleaning plate 3 thoroughly cleans the light sign 2, it moves to the middle of the light sign 2, so that the locking part 42 can release the limit on the light sign 2. Thus, both the cleaning plate 3 and the light sign 2 can be reset, which not only provides buffer protection for the light sign 2, but also cleans the dust on the light sign 2.

[0040] As an optional embodiment, the inner wall of the protective frame 1 is provided with a sliding groove 11 for guiding the light sign 2, and a guide groove 12 for guiding the cleaning plate 3. The protective frame 1 has an installation opening 13. There are two sets of guide grooves 12, with one end of each set close to the other and the other end close to the opening of the protective frame 1. The wires that power the light sign 2 can enter the protective frame 1 through the installation opening 13, allowing workers to connect the wires to the light sign 2 and install it with power.

[0041] As an optional embodiment, the light board 2 includes a light plate 21 slidably disposed within a slide groove 11, and a push post 22 disposed on the back of the light plate 21. The slide groove 11 limits the movement of the light board 21, allowing it to slide stably. When the light board 21 is subjected to external force such as a kick, it can move to dissipate the force and protect the light board 21. The light plate 21 includes a light plate body 211, a movable plate 212 disposed on the light plate body 211 and slidably connected to the slide groove 11, and an elastic member 213 disposed on the movable plate 212 and connected to the inner wall of the slide groove 22. The elastic member 213 is always in a compressed state, even when the light plate 21 is in its initial position. The elastic force of the elastic element 213 is always greater than that of the spring 32. Therefore, the elastic element 213 can push the lamp panel body 211 to reset without being affected by the spring 32. At the same time, the spring 32 is also in a compressed state and will perform the reset operation synchronously without affecting each other.

[0042] As an alternative embodiment, such as Figure 4 As shown, the push column 22 includes a sliding frame 221 disposed on the lamp panel 21, and a push column body 222 slidably connected to the inner wall of the sliding frame 221. The sliding frame 221 is slidably disposed on the outer circumferential surface of the push column body 222. Under normal conditions, there is a gap between the sliding frame 221 and the push column body 222, and the sliding frame 221 is never separated from the sliding column body 222.

[0043] As an optional embodiment, the cleaning plate 3 includes a cleaning strip 31 slidably connected to the guide groove 12, and a spring 32 disposed on the cleaning strip 31 and connected to the protective frame 1, the spring 32 being inclined. The cleaning strip 31 is provided with a push surface 311. The height of the cleaning strip 31 is slightly higher than the height of the lamp plate 21; the spring 32 is always in a compressed state. When the lamp plate 21 is in a normal state, the angle between the spring 32 and the lamp plate 21 is greater than the angle between the spring 32 and the lamp plate 21 when the lamp plate 21 is under force. These angles are all acute angles. Therefore, when the lamp plate 21 is under force, the spring 32 pushes the cleaning strip 31 to slide along the surface of the lamp plate 21 to clean the dust on the surface of the lamp plate 21.

[0044] As an alternative embodiment, such as Figure 5-7 As shown, the fixing part 41 includes a fixing plate 411 disposed on the inner wall of the protective frame 1, and a mounting plate 412 disposed on the fixing plate 411 and connected to the bottom surface of the fixing plate 411. The mounting plate 412 and the fixing plate 411 form an L-shape. Two sets of fixing parts 41 are symmetrically arranged, and the two sets of fixing parts 41 are distributed side by side. The clamping part 42 and the moving part 43 can be installed through the two sets of fixing parts 41. The mounting plate 412 is located on the side of the fixing plate 411 away from the lamp panel 21.

[0045] As an optional embodiment, the clamping part 42 includes a rotating shaft 421 rotatably mounted on the fixed plate 411, a swing plate 422 mounted on the rotating shaft 421, and a clamping plate 423 mounted on the swing plate 422 at the end away from the rotating shaft 421. The clamping plate 423 has a relief surface on its side that cooperates with the push surface 311. When the cleaning strip 31 drives the push surface 311 to press against the relief surface, the clamping plate 423 rotates, releasing the restriction on the lamp plate 21, so that the lamp plate 21 can be reset under the action of the elastic member 213. The bottom surface of the clamping plate 423 is lower than the height of the lamp plate 21, which can limit and clamp the lamp plate 21. The swing plate 422 rotates around the rotating shaft 421, causing the height of the clamping plate 423 to change, thus avoiding obstruction of the movement of the lamp plate 21. At the same time, when the rotating shaft 421 resets, the height of the clamping plate 423 decreases, which can limit the lamp plate 21 and prevent the lamp plate 21 from resetting immediately after the external force is removed. This provides time for the cleaning strip 31 to move, enabling a comprehensive and thorough cleaning of the lamp plate 21.

[0046] As an optional embodiment, the moving part 43 includes a sliding column 431 slidably disposed on the mounting plate 412, a connecting rope 432 disposed on the sliding column 431 and connected to the swing plate 422, and a rotating cylinder 433 sleeved on the sliding column 431. The mounting plate 412 is provided with an inclined moving groove 4121. The moving groove 4121 is inclined upward along the pressing direction of the lamp plate 21, which can push the sliding column 431 to slide along the moving groove 4121 when the lamp plate 21 moves. The sliding column 431 pulls the swing plate 422 to rotate around the rotating shaft 421 through the connecting rope 432, so that the height of the clamping plate 423 changes, avoiding obstruction of the movement of the lamp plate 21. As the sliding column 431 slides along the moving groove 4121, the height of the sliding column 431 gradually increases, so the sliding column 431 gradually separates from the pushing component 5. Therefore, the moving part 43 can fall back to its original position along the moving groove 4121, and then the clamping part 42 resets. The clamping plate 423 clamps and limits the reset lamp plate 21, avoiding the immediate reset of the lamp plate 21.

[0047] As an optional embodiment, the pushing component 5 includes a fixed seat 51 disposed on the pushing column 222, and a push plate 52 oscillatingly disposed on the fixed seat 51. The fixed seat 51 and the sliding frame 221 are arranged side by side. The height of the sliding frame 221 is greater than the height of the fixed seat 51. When the lamp panel 21 moves, causing the sliding frame 221 to move, the sliding frame 221 pushes the push plate 52 to rotate, thereby changing the height of the push plate 52, which facilitates pushing the sliding column 431 to slide along the moving groove 4121.

[0048] As an optional embodiment, the push plate 52 has an opening groove 521 in the middle. The connecting rope 432 is connected to the middle of the sliding column 431. The rotating cylinder 433 includes two sleeves, both of which are fitted onto the sliding column 431. The two sleeves are located on both sides of the connecting rope 432, which is located at the opening groove 521. The inner diameter of both sleeves is larger than the diameter of the sliding column 431. The push plate 52 pushes the sliding column 431 to move. When the sliding column 431 moves to the highest point of the moving groove 4121, the push plate 52 pushes the rotating cylinder 433 to rotate, thereby causing the rotating cylinder 433 to move upward. The push plate 52 then separates from the rotating cylinder 433, allowing it to continue moving.

[0049] As an alternative embodiment, such as Figure 1-11 As shown, it also includes a locking component 6 disposed on the outer peripheral surface of the protective frame 1. The locking component 6 includes a locking frame 61 disposed on the outer peripheral surface of the protective frame 1, a pressure plate 62 slidably disposed on the locking frame 61, a locking part 63 disposed on the outer peripheral surface of the locking frame 61, a fixing block 64 disposed on the outer peripheral surface of the locking frame 61, and a limiting part 65 slidably disposed on the fixing block 64.

[0050] As an optional embodiment, the locking frame 61 has a mounting groove 611 on its outer peripheral surface, and the fixing block 64 is installed in the mounting groove 611.

[0051] As an optional embodiment, the pressure plate 62 includes a sliding plate 621 slidably disposed on the inner wall of the locking frame 61, and a threaded rod 622 disposed on the sliding plate 621. The end face of the sliding plate 621 away from the threaded rod 622 is provided with an inclined surface 6211. The pushing column 222 is provided with a sliding inclined surface 2221. The sliding surface 2221 slides and rubs against the inclined surface 6211, pushing the sliding plate 621 to move.

[0052] As an optional embodiment, the locking part 63 includes an internally threaded sleeve 631 rotatably mounted on the locking frame 61 and threadedly engaged with the threaded rod 622, and a clamping plate 632 mounted on the internally threaded sleeve 631. When the sliding plate 621 moves the threaded rod 622, the internally threaded sleeve 631 drives the clamping plate 632 to rotate, thereby clamping the clamping plate 632 onto the fixing block 64.

[0053] As an optional embodiment, the limiting part 65 includes a limiting slide plate 651 slidably disposed on the fixing block 64, a connecting plate 652 disposed on the limiting slide plate 651, and a fastening plate 653 disposed on the connecting plate 652. The end faces of the fixing block 64 and the fastening plate 653 that are mutually clamped are provided with guide surfaces 641 and limiting grooves 642. The depth of the limiting groove 642 is much smaller than the thickness of the clamping plate 652. The clamping plate 652 is engaged in the limiting groove 642, pushing the fastening plate 653 away from the fixing block 64, thereby pressing the fastening plate 653 against the inner wall of the original wire pre-drilled hole, thereby locking and limiting the entire device. As the pushing column 222 slides with the external force, when subjected to the external force, the pushing column 222 pushes the sliding plate 621 to slide, causing the internal threaded sleeve 631 to drive the clamping plate 632 to rotate. The rotation of the clamping plate 632 pushes the fastening plate 653 to move, and the fastening plate 653 presses against the inner wall of the wire pre-drilled hole, thereby achieving further locking and installation of the entire device.

[0054] In summary, by installing the opening 13, the wires are connected to the light sign 2, thus achieving the electrical connection and installation of the light sign 2. When an external force presses on the light panel body 211, it pushes the light panel body 211 to slide, compressing the elastic element 213. The light sign body 211 drives the sliding frame 221 to move. The sliding frame 221 moves along the pushing column 222, pushing the push plate 52 to swing, thereby causing the push plate 52 to push the sliding column 431 to slide. The sliding column 431 pulls the connecting rope 432, causing the swing plate 422 to swing, thereby causing the clamping plate 423 to swing upward. The light sign 2 moves smoothly to the rear of the clamping plate 423. When the push plate 52 separates from the rotating cylinder 433, the swing plate 422 and the clamping plate 423 return to their original positions. The light board 2 is limited, and the spring 32 pushes the cleaning strip 31 to slide when the light board 2 starts to move. The cleaning strip 31 is blocked when it slides to the point where the external force is applied. Due to the obstruction of the light board body 211 by the clamping plate 423, the cleaning strip 31 can still move under the push of the spring 32 after the external force is removed to clean the dust on the surface of the light board body 211, providing time for the cleaning strip 31 to move to the middle. As the cleaning strip 31 approaches, the pushing surface 311 pushes the yielding surface, and the clamping plate 423 rotates, releasing the limitation on the light board 21. The light board 21 can be reset under the action of the elastic member 213. When resetting, the cleaning strip 31 moves along the middle of the light board 21 to both sides to further clean the light board 21.

[0055] When the light sign 2 moves backward together with the sliding frame 221 and the push column 222, the push column 222 pushes the sliding plate 621 to move, which causes the internal threaded sleeve 631 to drive the clamping plate 632 to rotate. The rotation of the clamping plate 632 pushes the fastening plate 653 to move, and the fastening plate 653 presses against the inner wall of the wire pre-drilled hole, thereby achieving further locking and installation of the entire device.

[0056] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A self-maintaining fire protection device, characterized by: The utility model relates to a lamp plate protection device, including, Protective frame (1); Lamp board (2) is located in the protective frame (1), the lamp board (2) is movably arranged in the protective frame (1), is used for carrying out sliding buffering, reduces direct damage to the lamp board (2); Cleaning plate (3) is located in the protective frame (1), the cleaning plate (3) is used for the sliding friction with the lamp board (2) to the lamp board (2) is cleaned slidingly; Clamping assembly (4) includes the fixed part (41) being arranged in the protective frame (1), the clamping part (42) being rotatably arranged on the fixed part (41), and the moving part (43) being slidably arranged on the fixed part (41), for the clamping part (42) is rotated by the moving of moving part (43) and is clamped to the lamp board (2) is clamped and positioned;And Pushing assembly (5) is arranged on the lamp board (2), is used for pushing the clamping assembly (4) to the lamp board (2) is clamped along with the movement of the lamp board (2).

2. The self-maintaining fire protection apparatus of claim 1, wherein: The inner wall of the protective frame (1) is provided with a sliding groove (11) for sliding guiding the lamp board (2), the inner wall of the protective frame (1) is provided with a guide groove (12) for guiding the cleaning plate (3), the protective frame (1) is provided with an installation opening (13), the guide groove (12) is provided with two groups, and the two groups of guide grooves (12) are away from the opening of the protective frame (1) at the end close to each other, and the two groups of guide grooves (12) are close to the opening of the protective frame (1) at the end away from each other.

3. A self-maintaining fire extinguishing device according to claim 2, characterised in that: The lamp board (2) includes a lamp plate (21) slidably arranged in the sliding groove (11), and a pushing column (22) arranged on the back of the lamp plate (21).

4. The self-maintaining fire protection apparatus of claim 3, wherein: The pushing column (22) includes a sliding frame (221) arranged on the lamp plate (21), and a pushing column body (222) slidably connected with the inner wall of the sliding frame (221).

5. A self-maintaining fire extinguishing device according to claim 4, characterised in that: The cleaning plate (3) includes a cleaning strip (31) slidably connected with the guide groove (12), and a spring (32) arranged on the cleaning strip (31) and connected with the protective frame (1), and the spring (32) is arranged obliquely.

6. The self-maintaining fire protection apparatus of claim 5, wherein: The fixed part (41) includes a fixed plate (411) arranged on the inner wall of the protective frame (1), and a mounting plate (412) arranged on the fixed plate (411) and connected with the bottom surface of the fixed plate (411), and the mounting plate (412) and the fixed plate (411) form an L type.

7. A self-maintaining fire extinguishing device according to claim 6, characterised in that: The clamping part (42) includes a rotating shaft (421) rotatably arranged on the fixed plate (411), a swing plate (422) arranged on the rotating shaft (421), and a clamping plate (423) arranged on the end of the swing plate (422) away from the rotating shaft (421).

8. The self-maintaining fire protection apparatus of claim 7, wherein: The moving part (43) comprises a sliding column (431) slidingly arranged on the mounting plate (412), a connecting rope (432) arranged on the sliding column (431) and connected with the swing plate (422), and a rotating cylinder (433) sleeved on the sliding column (431), and the mounting plate (412) is provided with a moving groove (4121) arranged obliquely.

9. A self-maintaining fire extinguishing device according to claim 8, characterised in that: The pushing assembly (5) comprises a fixing seat (51) arranged on the pushing column body (222), and a push plate (52) swingingly arranged on the fixing seat (51), and the fixing seat (51) is distributed side by side with the sliding frame (221).

10. The self-maintaining fire protection apparatus of claim 9, wherein: The middle part of the push plate (52) is provided with an open groove (521), the connecting rope (432) is connected with the middle part of the sliding column (431), the rotating cylinder (433) comprises two sleeves, both sleeves are sleeved on the sliding column (431), both sleeves are located on both sides of the connecting rope (432), and the connecting rope (432) is located at the open groove (521).

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