Fire-fighting box water hose unfolding device

Abstract

The fire-fighting box water hose unfolding device comprises a support fixedly connected into a fire-fighting box, a sliding groove is formed in the support, a plurality of sliding seats are slidably connected into the sliding groove, the sliding seats are rotatably connected with hanging rods, and a water hose is sequentially hung on the hanging rods; the sliding groove is provided with a notch for the sliding base to slide out, when the sliding base slides to the notch, limiting on the hanging rod can be relieved, and at the moment, the hanging rod can freely rotate around the sliding base. The device is convenient to operate, a water hose in the fire-fighting box can be rapidly unfolded, the situation that the water hose is stuck when unfolded is effectively prevented, and the device can be well suitable for being used in emergency situations.

Description

Technical Field

[0001] The present invention relates to the technical field of fire fighting equipment, and particularly relates to a device for deploying a fire hose in a fire box. Background Art

[0002] A fire box refers to a box-shaped fixed fire fighting device installed on the fire water supply pipeline in a building, which is composed of a box body, an indoor fire hydrant, a fire fighting interface, a fire hose, a fire fighting nozzle, a fire hose reel or a fire hose hanger, and electrical equipment, etc., and has functions such as water supply, fire extinguishing, control, and alarm.

[0003] After retrieval, a patent with the publication number CN 216258865 U discloses a fire hydrant box for a garage, which includes a fire hydrant box main body and a water inlet pipe. The water inlet pipe includes a vertical pipe, a connecting pipe, and a connecting elbow. The fire hydrant box main body includes an outer box, a fire hose, a nozzle, and a single-pass plug. The vertical pipe is installed through the left side of the outer box, and after the lower end of the vertical pipe passes through the outer box, it turns back through the connecting pipe and the connecting elbow and penetrates into the outer box to be connected with the single-pass plug; the outer box includes a box body and a box cover. A pull-out side plate is provided on one side of the box body, and a fire hose hanging device is provided between the pull-out side plate and the back plate of the box body; the fire hose hanging device includes a telescopic cross arm and a hanging pin. A first fixing column and a first sliding column are provided on the back plate of the box body, and a second fixing column and a second sliding column are provided on the pull-out side plate.

[0004] However, the above device still has the following problems. When using a telescopic cross arm, when the fire hose is taken off from the hanger, due to the obstruction of the sliding column, there is a risk of rewinding the fire hose around the sliding column again. And when the fire hose is pulled urgently, due to its own material, the frictional resistance is relatively large. There is a situation where the adjacent hoses are bent and moved upward together, and are squeezed by the sliding column, making it difficult to pull, thus affecting the use in case of an emergency. Summary of the Invention

[0005] In order to solve the problems existing in the above-mentioned prior art, a device for deploying a fire hose in a fire box is provided.

[0006] The technical solution adopted by the present invention to solve its technical problems is: The present invention provides a device for deploying a fire hose in a fire box, which includes a bracket fixedly connected inside the fire box. The bracket is provided with a chute, and a plurality of sliding seats are slidably connected in the chute. A hanging rod is rotatably connected to the sliding seat, and the fire hose is sequentially hung on a plurality of hanging rods; the chute is provided with a notch for the sliding seat to slide out. When the sliding seat slides to the notch, the limit on the hanging rod can be released, and at this time, the hanging rod can freely rotate around the sliding seat.

[0007] Preferably, a rotating shaft is rotatably connected to the sliding seat, the hanging rod and the rotating shaft are fixedly connected, a groove is provided on the rotating shaft, and a clamping rod that can slide into the groove is slidably connected to the sliding seat.

[0008] Preferably, a compression spring is hung on the clamping rod. One end of the compression spring is connected to the clamping rod, and the other end of the compression spring is connected to the sliding seat. The elastic force of the compression spring can make the clamping rod slide out of the groove, so as to release the limit on the hanging rod.

[0009] Preferably, a limiting rod is slidably connected to the sliding seat. The limiting rod is arranged on one side of the clamping rod to play a role in stopping the movement of the clamping rod.

[0010] Preferably, a movable seat moving in the vertical direction is slidably connected to the sliding seat. A magnetic block is slidably connected in the movable seat. The magnetic block is connected to the movable seat through a support spring. The lower end of the limiting rod penetrates into the movable seat and is fixedly connected to the magnetic block. A magnet attracting the magnetic block is connected at the notch.

[0011] Preferably, the movable seat is connected to the sliding seat through a tension spring. The limiting rod is provided with a through hole for the clamping rod to freely penetrate. When the tension spring is in its original length, the through hole moves to one side of the clamping rod.

[0012] Preferably, it further includes a connecting seat. The connecting seat is fixedly connected with a clamping pin. The clamping pin is slidably connected to the sliding seat. The movable seat is provided with a clamping hole for the clamping pin to slide into.

[0013] Preferably, a plug rod is slidably connected to the connecting seat. The plug rod is connected to the connecting seat through a spring. The magnetic block is provided with a jack for the plug rod to slide into. The movable seat is rotatably connected with a baffle plate that stops the plug rod. The plug rod is located between the baffle plate and the magnetic block.

[0014] Preferably, a rope winding wheel is rotatably connected in the movable seat. A pulling rope is wound around the rope winding wheel. The other end of the pulling rope is connected to the connecting seat in the adjacent movable seat. The rope winding wheel is connected with a scroll spring.

[0015] Preferably, the baffle plate is connected to the movable seat through a torsion spring. The magnetic force of the magnet is greater than the sum of the elastic forces of the spring and the support spring. The elastic force of the torsion spring is greater than the sum of the elastic forces of the spring and the scroll spring. When the spring is in its original length, the plug rod slides into the jack. The baffle plate and the plug rod are arranged in a dislocation manner and the baffle plate stops the plug rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present application is provided with a rotatable hanging rod. When the water hose is pulled, the water hose can drive the hanging sliding seat to move. When the sliding seat slides to the notch of the chute, at this time, the magnet attracts the limiting rod, driving the limiting rod to descend, so as to release the block on the clamping rod. The compression spring drives the clamping rod to reset, so as to release the limit on the rotating shaft. At this time, the hanging rod can freely rotate around the sliding seat, thus no longer supporting the water hose, which is convenient for the water hose to be pulled out and improves the pulling efficiency of the water hose.

[0017] 2. The present application is provided with a connecting seat. When the sliding seat gets stuck, the water hose will drive the adjacent sliding seat to move, causing the connecting seat to pull the baffle plate to move. The connecting seat drives the pin to release the limit on the movable seat, and the tension spring can drive the movable seat to reset. The locking rod can slide into the through hole of the limiting rod, and can also release the limit on the hanging rod, effectively preventing the occurrence of the situation where the sliding seat gets stuck when the water hose is unfolded, and being better applicable to use in emergency situations.

[0018] 3. The present application is provided with an insertion rod, which can support the magnetic block. When the magnetic block descends, the magnetic block drives the insertion rod to descend. The insertion rod can move to a position lower than the baffle plate. At this time, the baffle plate no longer blocks the insertion rod, and the rope winding wheel of the adjacent sliding seat can pull the connecting seat out, thereby releasing the connection between the two sliding seats, and thus not affecting the movement of the other sliding seats, making the extraction of the water hose smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where: Figure 1 is the overall front view of the present invention; Figure 2 is Figure 1 the sectional view of the structure of part A - A in Figure 3 is Figure 2 the enlarged view of the structure of part K in Figure 4 is Figure 1 the enlarged view of the structure of part B in Figure 5 is Figure 4 the enlarged view of the structure of part E in Figure 6 is Figure 1 the enlarged view of the structure of part C in Figure 7 is Figure 4 the sectional view of the structure of the movable seat part in Figure 8 is Figure 1 the perspective view of the structure of the bracket part in Figure 9 is Figure 1 the perspective view of the bracket structure in Figure 10 is Figure 1 the perspective view of the structure of the sliding seat part in

[0020] Description of the reference numerals: 1 Fire box; 2 Hose; 3 Bracket; 4 Slide seat; 5 Hanging rod; 6 Chute; 7 Rotating shaft; 8 Clamping rod; 9 Limiting rod; 10 Magnet; 11 Movable seat; 12 Through hole; 13 Pulling rope; 14 Pulling spring; 15 Magnet; 16 Baffle; 17 Connecting seat; 18 Inserting rod; 19 Pin; 20 Storage groove; 21 Rope winding wheel; 22 Notch; 23 Compression spring. Detailed implementation mode

[0021] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and cannot be understood as a limitation of the present invention.

[0022] As Figures 1-10 shown, this embodiment proposes a hose deployment device for a fire box, including a bracket 3 fixedly connected inside the fire box 1. The bracket 3 is provided with a chute 6. A plurality of slide seats 4 are slidably connected in the chute 6. The slide seats 4 are rotatably connected with hanging rods 5. The hose 2 is sequentially hung on a plurality of hanging rods 5. The chute 6 is opened in the horizontal direction, and the lengths of the bracket 3 and the chute 6 are long enough, so as to facilitate the hanging of the hose 2.

[0023] The chute 6 is provided with a notch 22 for the slide seat 4 to slide out. When the slide seat 4 slides to the notch 22, the limit on the hanging rod 5 can be released. At this time, the hanging rod 5 can rotate freely around the slide seat 4. When extracting and deploying the hose 2, the hose 2 is extracted from the direction of the notch 22. As the slide seats 4 slide to the notch 22 in sequence, the limit on the hanging rod 5 can be released in sequence, so as to no longer support the hose 2, facilitating the extraction of the hose 2.

[0024] When fixing the hose 2, first, after the hose 2 is bent, the bent part of the hose 2 is hung on the hanging rod 5. Then, the hose 2 is bent in sequence, and the number of bent parts is adapted to the number of hanging rods 5. An appropriate number of slide seats 4 are sequentially placed into the chute 6, and finally the hanging of the hose 2 is realized. By using the above method to hang the hose 2, it can be applied to the use of a long enough hose 2 and is not limited by the length of the hose 2.

[0025] The slide seat 4 is rotatably connected with a rotating shaft 7. The hanging rod 5 and the rotating shaft 7 are fixedly connected. The hanging rod 5 can rotate freely around the rotating shaft 7. The rotating shaft 7 is provided with a groove. The slide seat 4 is slidably connected with a clamping rod 8 that can slide into the groove. The clamping rod 8 can only slide in the horizontal direction. When the clamping rod 8 slides into the groove, the limit on the rotating shaft 7 can be realized at this time. The upper end of the clamping rod 8 is located outside the slide seat 4, so as to facilitate the subsequent reset of the clamping rod 8.

[0026] A compression spring is sleeved on the clamping rod 8. One end of the compression spring is connected to the clamping rod 8, and the other end is connected to the sliding seat 4. The elastic force of the compression spring can cause the clamping rod 8 to slide out of the groove, thereby releasing the limit on the hanging rod 5. The sliding seat 4 is slidably connected with a limiting rod 9. The limiting rod 9 is arranged on one side of the clamping rod 8 and can only slide in the vertical direction.

[0027] When the limiting rod 9 slides to one side of the clamping rod 8, at this time, the clamping rod 8 and the limiting rod 9 are in contact, playing a role in blocking the movement of the clamping rod 8. At this time, the compression spring deforms. When the limiting rod 9 descends and releases the limit on the clamping rod 8, the elastic force of the compression spring can drive the clamping rod 8 to slide out of the groove. The clamping rod 8 moves above the limiting rod 9, thereby releasing the limit on the rotating shaft 7, and the hanging rod 5 can rotate freely around the rotating shaft 7.

[0028] The sliding seat 4 is slidably connected with a movable seat 11 that moves in the vertical direction. A magnetic block 10 is slidably connected inside the movable seat 11. The magnetic block 10 is connected to the movable seat 11 through a support spring. The lower end of the limiting rod 9 penetrates into the movable seat 11 and is fixedly connected to the magnetic block 10. A magnet 15 that attracts the magnetic block 10 is connected at the notch 22. The magnet 15 and the bracket 3 are detachably connected. When the sliding seat 4 moves to the notch 22, the magnet 15 attracts the magnetic block 10, and the magnetic block 10 drives the limiting rod 9 to descend.

[0029] When the water hose 2 is pulled, the water hose 2 can drive the hanging sliding seat 4 to move. When the sliding seat 4 slides to the notch 22 of the chute 6, at this time, the magnet 15 attracts the limiting rod 9, driving the limiting rod 9 to descend, thereby releasing the block on the clamping rod 8. The compression spring drives the clamping rod 8 to reset, thereby releasing the limit on the rotating shaft 7. At this time, the hanging rod 5 can rotate freely around the sliding seat 4, and thus no longer supports the water hose 2, facilitating the extraction of the water hose 2 and improving the extraction efficiency of the water hose 2.

[0030] The movable seat 11 is connected to the sliding seat 4 through a tension spring 14. The lower end of the tension spring 14 is connected to the movable seat 11, and the upper end is connected to the sliding seat 4. The arrangement of the tension spring 14 realizes the support for the movable seat 11. The limiting rod 9 is provided with a through hole 12 for the clamping rod 8 to freely penetrate. When the tension spring 14 is in its original length, the through hole 12 moves to one side of the clamping rod 8.

[0031] It further includes a connecting seat 17. The connecting seat 17 is fixedly connected with a clamping pin 19. The clamping pin 19 is slidably connected with the sliding seat 4. The movable seat 11 is provided with a clamping hole for the clamping pin 19 to slide into. When the clamping pin 19 is located in the clamping hole, at this time, the tension spring 14 is in a stretched state, and the limiting rod 9 is in a state of limiting the clamping rod 8. The through hole 12 is located below the clamping rod 8. When the clamping pin 19 moves out of the clamping hole, the tension spring 14 drives the movable seat 11 to rise, and the through hole 12 can move to one side of the clamping rod 8, releasing the limit on the clamping rod 8.

[0032] The connecting seat 17 is slidably connected with a plug rod 18. The plug rod 18 is connected to the connecting seat 17 through a spring 23. The upper end of the spring 23 is connected to the plug rod 18, and the lower end of the spring 23 is connected to the connecting seat 17. The magnet block 10 is provided with a jack for the plug rod 18 to slide into. When the spring 23 is in its original length, the plug rod 18 can just slide into the jack. The movable seat 11 is rotatably connected with a baffle 16 that has a stopping effect on the plug rod 18. The plug rod 18 is located between the baffle 16 and the magnet block 10.

[0033] A rope winding wheel 21 is rotatably connected inside the movable seat 11. A pull rope 13 is wound around the rope winding wheel 21. The other end of the pull rope 13 is connected to the connecting seat 17 inside the adjacent movable seat 11. The rope winding wheel 21 is connected with a volute spring. One end of the volute spring is connected to the rope winding wheel 21, and the other end is connected to the movable seat 11. The volute spring is used to wind the pull rope 13, facilitating the pull rope 13 to return to its initial state.

[0034] The baffle 16 is connected to the movable seat 11 through a torsion spring. One end of the torsion spring is connected to the baffle 16, and the other end is connected to the movable seat 11. The elastic force of the torsion spring is very large, far greater than the sum of the elastic forces of the spring 23 and the volute spring, thus facilitating the baffle 16 to limit the connecting seat 17.

[0035] When the sliding seat 4 gets stuck, the water hose 2 will drive the adjacent sliding seat 4 to move, causing the connecting seat 17 to pull the baffle 16 to move. The connecting seat 17 drives the pin 18 to release the limit on the movable seat 11. The tension spring 14 can drive the movable seat 11 to reset. The locking lever 8 can slide into the through hole 12 of the limiting lever 9, and can also release the limit on the hanging rod 5, effectively preventing the situation of the sliding seat getting stuck when the water hose 2 is deployed, and being able to be well applied to emergency situations.

[0036] The lower end of the baffle 16 is provided with an inclined surface. The magnetic force of the magnet 15 is greater than the sum of the elastic forces of the spring 23 and the support spring, so that when the magnet 15 attracts the magnet block 10, the magnet block 10 can drive the plug rod 18 to descend simultaneously. At this time, the volute spring drives the connecting seat 17 to move through the rope winding wheel 21. Under the action of the inclined surface at the lower end of the baffle 16, the plug rod 18 can move out of the jack, releasing the limit on the magnet block 10. The movable seat 11 is also provided with a storage groove 20, which is used to store the adjacent connecting seat 17 and its supporting structure.

[0037] When the spring 23 is in its original length, the plug rod 18 slides into the jack. The baffle 16 and the plug rod 18 are arranged in a staggered manner and the baffle 16 has a stopping effect on the plug rod 18. At this time, the adjacent sliding seats 4 are connected through the pull rope 13, and several sliding seats 4 are connected in sequence, thus better realizing the hanging of the water hose 2 and effectively reducing the phenomenon that the sliding seats 4 move freely in the chute 6.

[0038] The supporting spring and the insertion rod 18 cooperate with each other to support the magnet block 10. When the magnet block 10 descends, the magnet block 10 drives the insertion rod 18 to descend. The insertion rod 18 can move to a position lower than the baffle 16, and the baffle 16 no longer blocks the insertion rod 18. The rope winding wheel 21 of the adjacent slide seat 4 can pull the connecting seat 17 out, so as to release the connection between the two slide seats 4, thus not affecting the movement of the remaining slide seats 4 and making the extraction of the water hose 2 smoother.

[0039] A usage method of a water hose deployment device for a fire box, using the above-mentioned water hose deployment device for a fire box, includes the following steps: S1: In the direction of the notch 22, pull the water hose 2 outwards. The water hose 2 drives the rightmost slide seat 4 to move. At the same time, the water hose 4 slides around the hanging rod 5. As the water hose 2 is continuously pulled out, the water hose 2 drives the hanging rod 5 to move towards the direction close to the notch 22. When the slide seat 4 moves to the notch 22 position, the magnet 15 drives the magnet block 10 to descend; S2: The magnet block 10 drives the insertion rod 18 to descend. The insertion rod 18 descends to a position lower than the baffle 16. The scroll spring in the adjacent slide seat 4 drives the corresponding rope winding wheel 21 to rotate. The rope winding wheel 21 pulls the connecting seat 17 to move through the pull rope 13. The connecting seat 17 pulls the insertion rod 18 out of the insertion hole, thus releasing the limit on the magnet block 10, and the magnet block 10 drives the limit rod 9 to descend; S3: The limit on the clamping rod 8 is released when the limit rod 9 descends. The compression spring drives the clamping rod 8 to reset. The clamping rod 8 moves out of the groove of the rotating shaft 7. At this time, the rotating shaft 7 can rotate freely. The hanging rod 5 rotates around the rotating shaft 7, thus no longer supporting the water hose 2. As the water hose 2 unfolds, it drives several slide seats 4 to slide out of the notch 22 in sequence, and several hanging rods 5 release the support for the water hose 2 in sequence; In the initial state, the distance between the two slide seats 4 is relatively close under the action of the pull rope 13, thus saving space and not requiring the chute 6 to be set too long. As the water hose 2 is extracted, the lower end of the water hose 2 moves upwards, pushing the two slide seats 4 apart, thus driving the right slide seat 4 to move along the chute 6 and unlocking the hanging rod 5 in sequence.

[0040] When the sliding of the right slide seat 4 gets stuck, at this time the water hose 2 will push the two slide seats 4 apart to make the distance between the two slide seats 4 longer. At this time, the right slide seat 4 is stuck. The pull rope 13 of the left slide seat 4 pulls the connecting seat 17 of the right slide seat 4 to move. The connecting seat 17 pulls the baffle 16 to rotate around the movable seat 11. After the connecting seat 17 is pulled out of the movable seat 11, the connecting seat 17 drives the pin 19 to release the limit on the movable seat 11. The tension spring 14 pulls the movable seat 11 to rise, making the total length of the slide seat 4 and the movable seat 11 shorter and occupying less space in the chute 6, so that the slide seat 4 and the movable seat 11 can move freely in the chute 6; Meanwhile, the movable seat 11 drives the magnetic block 10 to rise through the support spring. The magnetic block 10 drives the limit rod 9 to rise, causing the through hole 12 to move to one side of the latch rod 8, releasing the limit on the latch rod 8. The compression spring drives the latch rod 8 to reset, and the latch rod 8 moves out of the groove of the rotating shaft 7. At this time, the rotating shaft 7 can rotate freely, and the hanging rod 5 rotates around the rotating shaft 7, thus no longer supporting the water hose 2. The sliding seat 4 on the left drives the sliding seat 4 on the right to move, causing both sliding seats 4 to move out from the notch 22, preventing the water hose 2 from being affected by the jamming of the sliding seat 4 during sliding.

[0041] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fire hose deployment device for a fire box, comprising a bracket (3) fixedly connected inside the fire box (1), characterized in that, The bracket (3) is provided with a chute (6), and a plurality of sliding seats (4) are slidably connected in the chute (6). A hanging rod (5) is rotatably connected to the sliding seat (4), and the water hose (2) is successively hung on a plurality of hanging rods (5); the chute (6) is provided with a notch (22) for the sliding seat (4) to slide out. When the sliding seat (4) slides to the notch (22), the limit on the hanging rod (5) can be released, and at this time, the hanging rod (5) can freely rotate around the sliding seat (4).

2. The water hose deployment device for a fire box according to claim 1, wherein A rotating shaft (7) is rotatably connected to the sliding seat (4). The hanging rod (5) is fixedly connected to the rotating shaft (7), and the rotating shaft (7) is provided with a groove. A clamping rod (8) that can slide into the groove is slidably connected to the sliding seat (4).

3. The water hose deployment device for a fire box according to claim 2, characterized in that, A compression spring is hung on the clamping rod (8). One end of the compression spring is connected to the clamping rod (8), and the other end of the compression spring is connected to the sliding seat (4). The elastic force of the compression spring can make the clamping rod (8) slide out of the groove, thereby releasing the limit on the hanging rod (5).

4. The water hose deployment device of a fire box according to claim 2, characterized in that A limiting rod (9) is slidably connected to the sliding seat (4). The limiting rod (9) is arranged on one side of the clamping rod (8) to play a role in stopping the movement of the clamping rod (8).

5. The fire box hose deployment device according to claim 4, characterized in that, An active seat (11) that moves in the vertical direction is slidably connected to the sliding seat (4). A magnetic block (10) is slidably connected in the active seat (11). The magnetic block (10) is connected to the active seat (11) through a support spring. The lower end of the limiting rod (9) penetrates into the active seat (11) and is fixedly connected to the magnetic block (10). A magnet (15) that attracts the magnetic block (10) is connected at the notch (22).

6. The water hose deployment device for a fire box according to claim 5, wherein, The active seat (11) is connected to the sliding seat (4) through a tension spring (14). The limiting rod (9) is provided with a through hole (12) for the clamping rod (8) to freely penetrate. When the tension spring (14) is in its original length, the through hole (12) moves to one side of the clamping rod (8).

7. The water hose deployment device for a fire box according to claim 5, characterized in that It further includes a connecting seat (17). A clamping pin (19) is fixedly connected to the connecting seat (17). The clamping pin (19) is slidably connected to the sliding seat (4). The active seat (11) is provided with a clamping hole for the clamping pin (19) to slide into.

8. The water hose deployment device of a fire box according to claim 7, characterized in that, A plug rod (18) is slidably connected to the connecting seat (17). The plug rod (18) is connected to the connecting seat (17) through a spring (23). The magnetic block (10) is provided with a jack for the plug rod (18) to slide into. A baffle (16) that stops the plug rod (18) is rotatably connected to the active seat (11). The plug rod (18) is located between the baffle (16) and the magnetic block (10).

9. The water hose deployment device for a fire box according to claim 8, characterized in that, A rope winding wheel (21) is rotatably connected in the active seat (11). A pull rope (13) is wound around the rope winding wheel (21). The other end of the pull rope (13) is connected to the connecting seat (17) in the adjacent active seat (11). The rope winding wheel (21) is connected with a volute spring.

10. A fire box hose deployment device according to claim 9, characterized in that, The baffle plate (16) is connected to the movable seat (11) through a torsion spring. The magnetic force of the magnet (15) is greater than the sum of the elastic forces of the spring (23) and the support spring. The elastic force of the torsion spring is greater than the sum of the elastic forces of the spring (23) and the scroll spring. When the spring (23) is at its original length, the insertion rod (18) slides into the insertion hole. The baffle plate (16) and the insertion rod (18) are arranged in a staggered manner and the baffle plate (16) has a stopping effect on the insertion rod (18).

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