Medical placement rack with height convenient to adjust for surgical caps and use method of medical placement rack
By designing a medical placement rack for surgical caps including adjustment mechanism, expansion mechanism and anti-disengagement mechanism, the problem of the existing placement rack being inconvenient for height adjustment is solved, the height accuracy adjustment and space expansion is achieved, the storage and usage experience of surgical caps is optimized, and the efficient operation ability of the operating room is improved.
Patent Information
- Application Number
- CN202510430871.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2025-06-13
AI Technical Summary
The existing height-adjusting surgical caps are not convenient for height adjustment, resulting in messy storage of surgical caps and inconvenient access, which affects the efficient operation of the operating room.
A medical placement rack for surgical caps including an adjustment mechanism, a capacity expansion mechanism and an anti-detachment mechanism is designed. The adjustment mechanism realizes height adjustment by rotating the handle and threaded rod, the expansion mechanism realizes space expansion through the slide plate and the hinge rod, and the anti-disengagement mechanism realizes rapid removal of the hook through the hook and the limiting plate.
It realizes the precise height adjustment and space expansion of the surgical cap placement frame, optimizes the storage and usage experience of surgical caps, improves the efficient operation ability of the operating room, and flexibly adapts to the needs of special scenarios.
Smart Images
Figure CN120130801A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of medical technology, and particularly to a medical placement rack for surgical caps that is convenient for height adjustment and its usage method. Background Technique
[0002] With the refinement of medical operations and the continuous strengthening of the concept of asepsis, a special placement rack is required for storing surgical caps. The placement rack can keep the surgical caps in a relatively independent space, reducing the chance of contact with external pollutants, thereby helping to maintain the cleanliness of the surgical caps and meeting the aseptic requirements of the operating room.
[0003] However, during the use of the existing medical placement rack for surgical caps with height adjustment, it is not convenient to adjust the height. The fixed height is difficult to adapt to the different operating space requirements around the operating table, resulting in chaotic storage of surgical caps and inconvenient access. Medical staff also need to spend extra energy to search for and pick up surgical caps during the busy surgical process, which is not conducive to the efficient operation of the operating room and instead becomes an obstacle. Summary of the Invention
[0004] The purpose of the present invention is to provide a medical placement rack for surgical caps that is convenient for height adjustment and its usage method. By setting up an adjustment mechanism, the problems of inconvenient height adjustment, the fixed height being difficult to adapt to different operating space requirements around the operating table, resulting in chaotic storage of surgical caps and inconvenient access, medical staff needing to spend extra energy to search for and pick up surgical caps during the busy surgical process, not being conducive to the efficient operation of the operating room and instead becoming an obstacle are solved.
[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:
[0006] The present invention is a medical placement rack for surgical caps that is convenient for height adjustment, including two support rods. An adjustment mechanism, several expansion mechanisms, and several anti - detachment mechanisms are arranged on the two support rods;
[0007] A support plate is fixedly connected between the two support rods. The adjustment mechanism includes a fixed box fixedly connected to the bottoms of the two support rods. A threaded rod is rotatably connected to the central axis of the support rod on the right side. The bottom of the threaded rod is fixedly connected to a T - shaped gear one. A rotating shaft is rotatably connected to the inner wall of the fixed box. The front side of the rotating shaft extends rotatably outside the fixed box, and the rear side of the rotating shaft is fixedly connected to a T - shaped gear two. The T - shaped gear two meshes with the T - shaped gear one.
[0008] Furthermore, a handle one is fixedly connected to the extending part of the rotating shaft. A sliding rod one is slidably connected to the inner wall of the fixed box. Two fixing rings are fixedly connected to the outer wall of the sliding rod one.
[0009] Further, a spring is fixedly connected between the two fixing rings. A limiting block is fixedly connected to the left side of the first sliding rod. The limiting block is adapted to the first T-shaped gear. A second handle is fixedly connected to the right side of the first sliding rod.
[0010] Further, a hollow rod is threadedly connected to the outer wall of the threaded rod. A fixing rod is fixedly connected to the front side of the hollow rod. A connecting rod is fixedly connected to the rear side of the fixing rod.
[0011] Further, the expansion mechanism includes a sliding plate disposed between two support rods. Two sliding grooves are formed in the sliding plate.
[0012] Further, two sliders are respectively slidably connected in the two sliding grooves. A plurality of hinge rods are hingedly arranged at the tops of the plurality of sliders. Two corresponding hinge rods of the plurality of hinge rods are hinged to each other.
[0013] Further, the anti-disengagement mechanism includes a connecting groove formed in the fixing rod. A limiting plate is fixedly connected in the connecting groove. A second sliding rod is slidably connected to the limiting plate.
[0014] Further, a limiting groove is formed in the second sliding rod. The limiting groove is adapted to the limiting plate. A hook is fixedly connected to the front side of the second sliding rod.
[0015] A usage method of a medical placement rack for an operation cap convenient for height adjustment includes the following steps:
[0016] S1: The height of the device can be adjusted by rotating the first handle. Before rotating the first handle, first pull the second handle. When the second handle moves, the first sliding rod will also move accordingly. When the first sliding rod moves, the fixing ring on it will also move accordingly. As the fixing ring moves, the spring will be compressed. At this time, as the first sliding rod moves, the limiting block will also move accordingly. As the limiting block continues to move, the restriction on the first T-shaped gear will stop, and then rotate the first handle. At this time, the rotating shaft will also rotate accordingly. When the rotating shaft rotates, the second T-shaped gear will also rotate accordingly. Thus, the second T-shaped gear will drive the first T-shaped gear meshing with it to rotate. When the first T-shaped gear rotates, the threaded rod will also rotate accordingly. At this time, as the threaded rod rotates, the hollow rod will gradually rise, and then the hollow rod will also drive the fixing rod to rise. When the fixing rod rises, the connecting rod will also rise accordingly. When it rises to the appropriate height, the second handle can be released. At this time, the extrusion force on the spring will pop out. When the spring stretches, it will also drive the fixing ring to stretch accordingly. When the fixing ring moves, the first sliding rod will also move accordingly. When the first sliding rod moves, the limiting block will be adapted to the first T-shaped gear again. Thus, the effect of restricting the reverse rotation of the first T-shaped gear is achieved, and the threaded rod will not flip;
[0017] S2: When the connecting rod rises, the uppermost slide plate will also rise accordingly. As the upper slide plate rises, the slide plate above it will be pulled and will slide in the slide groove. At this time, the two hinged rods will be extended. When the hinged rods are extended, the distance between the two slide plates will increase, thereby achieving the effect of expanding the space, so that the expanded placement rack can provide more storage space, thereby optimizing the overall layout of the operating room and reducing the manpower and time costs of adding additional placement racks or frequently sorting surgical caps.
[0018] S3: After the height adjustment is completed, the hook will be installed. At this time, the sliding rod 2 can be inserted into the limit opening on the limit plate. As the sliding rod 2 continues to be inserted, the sliding rod 2 will contact the limit plate of the limit plate. At this time, the sliding rod 2 will stretch the limit plate on the limit plate. At this time, the limit plate inserted into the limit plate will be adapted to the limit groove on the sliding rod 2. At this time, the placement and detachment of the sliding rod 2 are restricted. When the hook needs to be pulled out, the hook can be rotated. When the hook rotates, the sliding rod 2 will also rotate accordingly. When the sliding rod 2 rotates, the limit plate on the limit plate will be stretched open. Therefore, the limit plate will not restrict the sliding rod 2. When the sliding rod 2 stretches the limit on the limit plate, it can be pulled out.
[0019] The present invention has the following beneficial effects:
[0020] 1. The present invention is provided with an adjustment mechanism, and the height of the device can be adjusted by rotating the handle 1. Before rotating the handle 1, the handle 2 is first pulled. When the handle 2 moves, the slide bar 1 will also move accordingly. When the slide bar 1 moves, it will bring the fixing ring thereon to move accordingly. As the fixing ring moves, the spring will be squeezed. At this time, as the slide bar 1 moves, the limit block will also move accordingly. As the limit block continues to move, the restriction on the T-shaped gear 1 will be stopped. Then the handle 1 is rotated, and the shaft will also rotate accordingly. When the shaft rotates, the T-shaped gear 2 will also rotate accordingly. Therefore, the T-shaped gear 2 will drive the T-shaped gear 1 meshing therewith to rotate. When the T-shaped gear 1 rotates, the threaded rod will also rotate accordingly. At this time, as the threaded rod rotates, the hollow rod will gradually rise, and the hollow rod will be lifted accordingly. The core rod will also rise with the fixed rod. When the fixed rod rises, the connecting rod will also rise accordingly. When it reaches the appropriate height, you can release the handle 2, and the extrusion force on the spring will pop out. When the spring stretches, it will also stretch with the fixed ring. When the fixed ring moves, the slide bar 1 will also move. When the slide bar moves, the limit block will adapt to the T-shaped gear 1 again, thereby achieving the effect of limiting the reversal of the T-shaped gear 1, and the threaded rod will not flip over, so that the placement frame can be accurately adjusted to the optimal height position that fits the current space layout, ensuring that medical staff can use the surgical cap in the most convenient and efficient way in different operating room scenarios, greatly optimizing the storage and use experience of the surgical cap, and providing strong support for the efficient operation of the operating room.
[0021] 2. The present invention sets an expansion mechanism, and when the connecting rod rises, the uppermost slide plate will also rise accordingly. As the upper slide plate rises, the slide plate above it will be pulled and will slide in the slide groove. At this time, the two hinged rods will extend. When the hinged rods extend, the distance between the two slide plates will increase, thereby achieving the effect of expanding the space, so that the expanded placement rack can provide more storage space, thereby optimizing the overall layout of the operating room, reducing the manpower and time costs occupied by additional placement racks or frequent sorting of surgical caps, so that medical staff can focus more on the surgical operation itself, and further ensure the efficient and orderly operation of the operating room.
[0022] When the slide bar 2 is pulled out of the position, the limit plate on the limit plate will be adjusted, and the limit plate on the limit plate will be adjusted to fit the limit groove on the slide bar 2. At this time, the placement and falling-off restriction of the slide bar 2 is achieved. When the hook needs to be pulled out, the hook can be rotated. When the hook rotates, the slide bar 2 will also rotate accordingly. When the slide bar 2 rotates, the limit plate on the limit plate will be stretched open, so that the limit plate will not restrict the slide bar 2. When the slide bar 2 stretches the limit on the limit plate, it can be pulled out, so that medical staff can quickly disassemble the hook, meet the needs of cleaning, replacing the hook or adjusting the layout of the placement rack under special circumstances, flexible and practical, and fully take into account the convenience of daily use and the adaptability under special scenes.
[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0026] Figure 2 It is a partial cross-sectional structural schematic diagram of the present invention;
[0027] Figure 3 It is a schematic diagram of the local structure on the left side of the present invention;
[0028] Figure 4Schematic diagram of the partial sectional structure of the adjustment mechanism of the present invention;
[0029] Figure 5 Schematic diagram of the partial sectional structure of the anti - detachment mechanism of the present invention;
[0030] Figure 6 For the present invention Figure 2 Enlarged schematic diagram of A in the present invention;
[0031] Figure 7 For the present invention Figure 2 Enlarged schematic diagram of A in the present invention.
[0032] In the attached drawings, the list of components represented by each reference numeral is as follows:
[0033] In the figure: 1, support rod; 101, support plate; 2, adjustment mechanism; 211, fixed box; 212, threaded rod; 213, T - shaped gear one; 214, rotating shaft; 215, T - shaped gear two; 216, handle one; 217, slide bar one; 218, fixed ring; 219, spring; 2110, limit block; 2111, handle two; 2112, hollow rod; 2113, fixed rod; 2114, connecting rod; 3, expansion mechanism; 311, slide plate; 312, chute; 313, slider; 314, articulated rod; 4, anti - detachment mechanism; 411, connection groove; 412, limit plate; 413, slide bar two; 414, limit groove; 415, hook. Detailed implementation manners
[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0035] Please refer to Figures 1-7As shown in the figure, the present invention is a medical placement rack for surgical caps that is convenient for height adjustment, including two support rods 1. An adjustment mechanism 2, several expansion mechanisms 3, and several anti - detachment mechanisms 4 are arranged on the two support rods 1. A support plate 101 is fixedly connected between the two support rods 1. The adjustment mechanism 2 includes a fixed box 211 fixedly connected to the bottoms of the two support rods 1. A threaded rod 212 is rotatably connected to the central axis of the right - hand support rod 1. A T - shaped gear one 213 is fixedly connected to the bottom of the threaded rod 212. A rotating shaft 214 is rotatably connected to the inner wall of the fixed box 211. The front side of the rotating shaft 214 extends rotatably outside the fixed box 211. A T - shaped gear two 215 is fixedly connected to the rear side of the rotating shaft 214. The T - shaped gear two 215 meshes with the T - shaped gear one 213. A handle one 216 is fixedly connected to the extended part of the rotating shaft 214. A slide bar one 217 is slidably connected to the inner wall of the fixed box 211. Two fixing rings 218 are fixedly connected to the outer wall of the slide bar one 217. A spring 219 is fixedly connected between the two fixing rings 218. A limiting block 2110 is fixedly connected to the left side of the slide bar one 217. The limiting block 2110 is adapted to the T - shaped gear one 213. A handle two 2111 is fixedly connected to the right side of the slide bar one 217. A hollow rod 2112 is threadedly connected to the outer wall of the threaded rod 212. A fixed rod 2113 is fixedly connected to the front side of the hollow rod 2112. A connecting rod 2114 is fixedly connected to the rear side of the fixed rod 2113. By setting the adjustment mechanism, the placement rack can be accurately adjusted to the optimal height position that fits the current spatial layout, ensuring that medical staff can retrieve surgical caps in the most convenient and efficient way in different operating room scenarios, greatly optimizing the storage and use experience of surgical caps, and providing strong support for the efficient operation of the operating room.
[0036] The expansion mechanism 3 includes a slide plate 311 arranged between the two support rods 1. Two sliding grooves 312 are opened on the slide plate 311. Two sliding blocks 313 are respectively slidably connected in the two sliding grooves 312. The tops of several sliding blocks 313 are respectively hinged with hinge rods 314. Two corresponding hinge rods 314 among several hinge rods 314 are hinged to each other. By setting the expansion mechanism, medical staff can focus more on the surgical operation itself, further ensuring the efficient and orderly operation of the operating room.
[0037] The anti - detachment mechanism 4 includes a connection groove 411 opened on the fixed rod 2113. A limiting plate 412 is fixedly connected in the connection groove 411. A slide bar two 413 is slidably connected to the limiting plate 412. A limiting groove 414 is opened on the slide bar two 413. The limiting groove 414 is adapted to the limiting plate 412. A hook 415 is fixedly connected to the front side of the slide bar two 413. By setting the anti - detachment mechanism, medical staff can quickly disassemble the hook to meet the needs of cleaning, replacing the hook, or adjusting the layout of the placement rack in special situations, which is flexible and practical, fully taking into account the convenience of daily use and the adaptability in special scenarios.
[0038] During use, first place the device in the corresponding position. Subsequently, the height of the device can be adjusted by rotating the first handle 216. Before rotating the first handle 216, first move the second handle 2111. When the second handle 2111 moves, the first sliding rod 217 will also move accordingly. When the first sliding rod 217 moves, it will drive the fixing ring 218 on it to move. As the fixing ring 218 moves, the spring 219 will be compressed. At this time, as the first sliding rod 217 moves, the limiting block 2110 will also move. As the limiting block 2110 continues to move, the restriction on the first T-shaped gear 213 will stop, and then rotate the first handle 216. At this time, the rotating shaft 214 will also rotate. When the rotating shaft 214 rotates, the second T-shaped gear 215 will also rotate. Thus, the second T-shaped gear 215 will drive the first T-shaped gear 213 meshing with it to rotate. When the first T-shaped gear 213 rotates, the threaded rod 212 will also rotate. At this time, as the threaded rod 212 rotates, the hollow rod 2112 will gradually rise, and the hollow rod 2112 will also drive the fixed rod 2113 to rise. When the fixed rod 2113 rises, the connecting rod 2114 will also rise. When it reaches the appropriate height, the second handle 2111 can be released. At this time, the extrusion force on the spring 219 will pop out. When the spring 219 extends, it will also drive the fixing ring 218 to extend. When the fixing ring 218 moves, the first sliding rod 217 will also move. When the first sliding rod 217 moves, the limiting block 2110 will be adapted to the first T-shaped gear 213 again. Thus, the effect of restricting the reverse rotation of the first T-shaped gear 213 is achieved. Thus, the threaded rod 212 will not flip. When the connecting rod 2114 rises, the uppermost sliding plate 311 will also rise. As the upper sliding plate 311 rises, the slider 313 on it will be pulled, and the slider 313 will slide in the chute 312. At this time, the two hinged rods 314 hinged together will extend. When the hinged rods 314 extend, the distance between the two sliding plates 311 will increase. Thus, the effect of expanding the space is achieved. After the height adjustment is completed, install the hook 415. At this time, the second sliding rod 413 can be inserted into the limiting port on the limiting plate 412. As the second sliding rod 413 continues to be inserted, the second sliding rod 413 will contact the limiting plate of the limiting plate 412. At this time, the second sliding rod 413 will push open the limiting plate on the limiting plate 412. At this time, then insert the limiting plate on the limiting plate 412 to be adapted to the limiting groove 414 on the second sliding rod 413. At this time, the restriction on the second sliding rod 413 from falling off is achieved. When it is necessary to pull out the hook 415, the hook 415 can be rotated. When the hook 415 rotates, the second sliding rod 413 will also rotate. When the second sliding rod 413 rotates, it will push open the limiting plate on the limiting plate 412. Thus, the limiting plate will not restrict the second sliding rod 413. After the second sliding rod 413 pushes open the limiting plate on the limiting plate 412, it can be pulled out.
[0039] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.
Claims
1. A medical placement stand for a surgical cap that is easy to adjust in height, comprising two support rods (1), characterized in that: The two support rods (1) are provided with an adjustment mechanism (2), a plurality of capacity expansion mechanisms (3) and a plurality of anti-slip mechanisms (4); A support plate (101) is fixedly connected between the two support rods (1); the adjustment mechanism (2) comprises a fixing box (211) fixedly connected to the bottom of the two support rods (1); a threaded rod (212) is rotatably connected to the center axis of the right support rod (1); a T-shaped gear 1 (213) is fixedly connected to the bottom of the threaded rod (212); a rotating shaft (214) is rotatably connected to the inner wall of the fixing box (211); the front side of the rotating shaft (214) is rotatably extended to the outside of the fixing box (211); a T-shaped gear 2 (215) is fixedly connected to the rear side of the rotating shaft (214); the T-shaped gear 2 (215) is meshed with the T-shaped gear 1 (213).
2. The height-adjustable medical placement stand for surgical caps according to claim 1, characterized in that: A handle 1 (216) is fixedly connected to the extension of the rotating shaft (214), a slide bar 1 (217) is slidably connected to the inner wall of the fixed box (211), and two fixing rings (218) are fixedly connected to the outer wall of the slide bar 1 (217).
3. The height-adjustable medical placement stand for surgical caps according to claim 2, characterized in that: A spring (219) is fixedly connected between the two fixing rings (218); a limit block (2110) is fixedly connected to the left side of the sliding rod (217); the limit block (2110) is matched with the T-shaped gear (213); and a handle (2111) is fixedly connected to the right side of the sliding rod (217).
4. The height-adjustable medical placement stand for surgical caps according to claim 3, characterized in that: A hollow rod (2112) is threadedly connected to the outer wall of the threaded rod (212), a fixed rod (2113) is fixedly connected to the front side of the hollow rod (2112), and a connecting rod (2114) is fixedly connected to the rear side of the fixed rod (2113).
5. The height-adjustable medical placement stand for surgical caps according to claim 4, characterized in that: The capacity expansion mechanism (3) comprises a slide plate (311) arranged between two support rods (1), and two slide grooves (312) are provided on the slide plate (311).
6. The height-adjustable medical placement stand for surgical caps according to claim 5, characterized in that: Two sliders (313) are slidably connected in the two slide grooves (312), respectively, and a hinge rod (314) is hingedly provided at the top of a plurality of the sliders (313), and two corresponding ones of the plurality of the hinge rods (314) are hingedly connected to each other.
7. The height-adjustable medical placement stand for surgical caps according to claim 6, characterized in that: The anti-slip mechanism (4) comprises a connection groove (411) provided on the fixing rod (2113), a limit plate (412) being fixedly connected in the connection groove (411), and a second sliding rod (413) being slidably connected to the limit plate (412).
8. The height-adjustable medical placement stand for surgical caps according to claim 7, characterized in that: The second slide bar (413) is provided with a limiting groove (414), the limiting groove (414) is matched with the limiting plate (412), and the front side of the second slide bar (413) is fixedly connected with a hook (415).
9. A method for using a medical placement stand for a surgical cap that is easy to adjust in height, using the medical placement stand for a surgical cap that is easy to adjust in height as described in claim 8, characterized in that: The steps include: S1: The height of the device can be adjusted by rotating the handle 1 (216). Before rotating the handle 1 (216), first pull the handle 2 (2111). When the handle 2 (2111) moves, the slide bar 1 (217) will also move accordingly. When the slide bar 1 (217) moves, it will bring the fixing ring (218) thereon to move accordingly. As the fixing ring (218) moves, the spring (219) will be squeezed. At this time, as the slide bar 1 (217) moves, the limit block (2110) will also move accordingly. As the limit block (2110) continues to move, the restriction on the T-shaped gear 1 (213) will stop. Then, the handle 1 (216) is rotated. At this time, the shaft (214) will also rotate accordingly. When the shaft (214) rotates, the T-shaped gear 2 (215) will also rotate accordingly. As a result, the T-shaped gear 2 (215) will drive the T-shaped gear 1 (213) meshing with it to rotate. When the T-shaped gear 1 (213) rotates, the threaded rod (212) will also rotate accordingly. At this time, as the threaded rod (212) rotates, the hollow rod (2112) will gradually rise, and the hollow rod (2112) will also rise with the fixing rod (2113). When the fixing rod (2113) rises, the connecting rod (2114) will also rise accordingly. When it rises to a suitable height, the handle 2 (2111) can be released. At this time, the squeezing force on the spring (219) will pop out. When the spring (219) stretches, it will also stretch with the fixing ring (218). When the fixing ring (218) moves, the sliding rod 1 (217) will also move accordingly. When the sliding rod 1 (217) moves, the limit block (2110) will adapt to the T-shaped gear 1 (213) again, thereby achieving the effect of limiting the reverse rotation of the T-shaped gear 1 (213), and the threaded rod (212) will not flip over. S2: When the connecting rod (2114) rises, the uppermost slide plate (311) will also rise accordingly. As the upper slide plate (311) rises, the slider (313) above it will be pulled and the slider (313) will slide in the slide groove (312). At this time, the two hinged rods (314) will be extended. When the hinged rods (314) are extended, the distance between the two slide plates (311) will increase, thereby achieving the effect of expanding the space. S3: After the height adjustment is completed, the hook (415) is installed. At this time, the second slide bar (413) can be inserted into the limiting opening on the limiting plate (412). As the second slide bar (413) is continuously inserted, the second slide bar (413) will contact the limiting plate of the limiting plate (412). At this time, the second slide bar (413) will open the limiting plate on the limiting plate (412). At this time, the limiting plate on the limiting plate (412) inserted next will contact the limiting groove (412) on the second slide bar (413). 4) is adapted, and at this time, the slide bar 2 (413) is restricted from falling off. When the hook (415) needs to be pulled out, the hook (415) can be rotated. When the hook (415) rotates, the slide bar 2 (413) will also rotate accordingly. When the slide bar 2 (413) rotates, the limit plate on the limit plate (412) will be opened, so that the limit plate will not restrict the slide bar 2 (413). When the slide bar 2 (413) opens the limit on the limit plate (412), it can be pulled out.