LED lamp assembly lamp holder

Abstract

The utility model discloses an LED lamp assembly lamp holder which comprises a bottom frame, a middle rod is arranged above the bottom frame, an ejector rod is arranged above the middle rod, quick assembly mechanisms are arranged at the two ends of the middle rod, and each quick assembly mechanism comprises an installation sleeve, a rotating plate, a clamping block, an abutting block, an insertion sleeve, a push plate, a clamping groove and a quick disassembly mechanism. The mounting sleeve is mounted at the top end of the bottom frame and the top end of the center rod, the multiple rotating plates are rotationally mounted on the outer wall of the mounting sleeve, the clamping blocks are mounted at the top ends of the multiple rotating plates, the abutting blocks are mounted at the bottom ends of the multiple rotating plates, the inserting sleeve is inserted into the mounting sleeve, and the multiple pushing plates slide on the outer wall of the inserting sleeve. According to the lamp holder, all the assemblies can be tightly fixed, instability in the assembling process is avoided, firm connection between the inserting sleeve and the mounting sleeve is ensured through cooperation of the clamping blocks and the clamping grooves, the assembling stability and safety are greatly improved, and therefore the assembling process of the lamp holder is rapid and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to modern lighting industry technical field, more specifically, it relates to a LED lamp assembly lamp stand. BACKGROUND

[0002] In modern lighting industry, especially in large-scale lighting projects and performance occasions, quick assembly and disassembly of lamp stand are the essential requirement, in these occasions, the installation and disassembly of lamps and lanterns not only need to be completed efficiently, but also need to be carried out in a short time, so as to cope with frequent adjustment and replacement task, if there is not a convenient and stable device, manual disassembly and installation process will consume a large amount of time and human resources, affect the overall work progress, therefore, the market urgently needs a kind of solution that can quickly and stably complete the assembly and disassembly of lamp stand,

[0003] In addition, in the assembly process of lamp stand, the traditional connecting mode usually relies on complex bolts and fixing devices, this kind of mode is stable, but often needs multi-step operation to complete the connection, for the scene needing frequent assembly and disassembly, this kind of complex operation mode is not only low in efficiency, but also is easy to cause unstable connection or damage when operating improperly. CONTENT OF UTILITY MODEL

[0004] (I) technical problem solved

[0005] In view of the problems in the prior art, the utility model provides a LED lamp assembly lamp stand to solve the technical problem that manual disassembly and installation process consume a large amount of time and human resources mentioned in the background art.

[0006] (II) technical scheme

[0007] To achieve the above object, the utility model provides following technical scheme: A LED lamp assembly lamp stand, including the chassis, the chassis top is equipped with the middle rod, the middle rod top is provided with the top rod, the both ends of middle rod are provided with quick -mounting mechanism, quick -mounting mechanism includes installation cover, turning plate, clamping block, block, bush, push -plate, slot and quick -release mechanism, installation cover installs at the top end of chassis and the top end of center rod, turning plate is provided with a plurality of rotation installations in the outer wall of installation cover, clamping block installs at the top end of a plurality of turning plates, block installs at the bottom end of a plurality of turning plates, bush is inserted in installation cover, push -plate is provided with a plurality of sliding in the outer wall of bush, slot is provided with a plurality of distribution in the outer wall of bush, quick -release mechanism includes rotating sleeve, center rod, spiral groove, sliding sleeve, sliding block, support sleeve, push block and tension spring, rotating sleeve rotation installs at the top end of bush, center rod installs at the bottom end of rotating sleeve, spiral groove sets up in the outer wall of center rod, sliding sleeve slides in the outer wall of center rod, sliding block installs in the inner wall of sliding sleeve and with spiral groove sliding connection, support sleeve installs in bush, push block installs in a plurality of push -plate inner side and with support sleeve sliding connection, tension spring is provided with a plurality of and is connected support sleeve with a plurality of push -plate.

[0008] The utility model further sets up, top rod top end installation is equipped with the mounting bracket, the mounting bracket is used to install the lamp, this design ensures that the lamp stand can firmly install the lamp, strengthens the installation safety of lamp, prevents the lamp from shaking or falling due to the unstable installation, improves the safety and stability in the use process.

[0009] The utility model further sets up, a plurality of push -plate outer side are equipped with the connecting block, the outer wall of bush is equipped with the connecting groove, the connecting groove is provided with a plurality of and is connected with a plurality of connecting block sliding respectively, this structural design makes push -plate and bush can firmly connect and realize the sliding fit, ensures the connection between push -plate and bush when assembling, improves the assembly stability of lamp stand whole and the smoothness of operation.

[0010] The utility model further sets up, a plurality of push -block bottom and sliding sleeve outer wall abut, this design strengthens the contact area between push block and sliding sleeve, improves the force transmission efficiency, avoids the looseness or deviation between parts, thereby ensures the stability of push block and the firmness of lamp stand whole structure, further improves the reliability in the process of assembling and disassembling.

[0011] The utility model further sets up, bush is equipped with the limit rod, the limit rod is provided with a plurality of and is connected with sliding sleeve sliding respectively, the setting of limit rod can limit the displacement range of bush in the assembling process, prevents bush from moving excessively or falling off, ensures the position accuracy of each component in the assembling process, improves the precision and stability of lamp stand assembly.

[0012] The utility model further sets up, two groups rotation cover respectively with the top rod bottom end and the center pole bottom end fixed connection. This design guarantees the stable connection between rotation cover and top rod, center pole, ensures the reliability and accuracy of rotation cover in the operation process, avoids the operation failure or instability caused by rotation cover loosening or misplacement.

[0013] The utility model further sets up, set up positioning mechanism on rotation cover, positioning mechanism includes lock block, lock slot, lock cover, push spring and reset spring, lock block sets up a plurality of and respectively sliding installation in rotation cover outer wall, lock slot sets up a plurality of distribution in the outer wall of bush, lock cover sliding in rotation cover outer wall, push spring sets up a plurality of and both ends are connected lock cover and rotation cover respectively, reset spring sets up a plurality of and is installed in a plurality of lock block inboard and is connected with rotation cover outer wall. The setting of positioning mechanism effectively prevents rotation cover from loosening or misplacement in the working process, ensures the overall stability of lamp stand and the safety in the use process, especially in the operation of frequent disassembly and assembly, can provide more convenient and safe positioning guarantee.

[0014] The utility model further sets up, rotation cover outer wall is seted up with guide slot, the inner wall of lock cover is equipped with guide plate, and rotation cover outer wall is seted up with a plurality of and sliding connection. The cooperation of guide slot and guide plate makes lock cover can slide smoothly on rotation cover outer wall, reduces friction and jam, ensures the smooth operation of positioning mechanism in the assembly and disassembly process, improves the operation smoothness of rotation cover, also prolongs the service life of equipment.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the utility model provides a kind of LED lamp assembly lamp stand, with following beneficial effects:

[0017] 1, quick -mounting mechanism is inserted by the insertion of mounting sleeve and bush, so that lamp stand can be rapidly connected in the assembly process, avoids the need of traditional method and time of tedious tool, and the cooperation of a plurality of push plates and a plurality of push blocks, utilizes the tensile action of tension spring, can ensure that each component is fixed tightly, avoids instability when assembling, and the cooperation of clamping block and clamping groove ensures the firm connection between bush and mounting sleeve, greatly improves the stability and safety of assembly, so that the assembly process of lamp stand is fast and reliable.

[0018] 2. The quick-release mechanism, through the cooperation of the spiral groove and slider between the rotating sleeve and the central rod, can quickly disconnect the connection during disassembly, avoiding the cumbersome operation and time waste in traditional disassembly methods. The sliding of the sleeve and the elastic reset of multiple sets of push blocks allow the push plate to move back quickly, releasing the fixation of each component. At the same time, the elastic action of the tension spring can quickly restore the position of each component, ensuring that each part can be smoothly separated during disassembly, reducing the risk of human error and improving disassembly efficiency.

[0019] 3. The positioning mechanism effectively positions the rotating sleeve through the cooperation of the locking block and the locking groove, preventing accidental loosening or misalignment during the use of the lamp holder, thus ensuring the stability and safety of the lamp holder. When unlocking is required, the push spring and the return spring allow the positioning mechanism to be smoothly released, ensuring that the rotating sleeve can rotate freely. This makes the assembly and disassembly process of the lamp holder more efficient and smooth. Through this series of designs, the present invention provides a fast, safe, and stable method for assembling and disassembling lamp holders, greatly improving the convenience of operation and work efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an LED lamp assembly frame according to the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the intermediate rod in this utility model;

[0022] Figure 3 This is a cross-sectional view of the quick-assembly mechanism in this utility model;

[0023] Figure 4 This is a cross-sectional view of the insert in this utility model;

[0024] Figure 5 This is a cross-sectional view of the positioning mechanism in this utility model.

[0025] In the diagram: 1. Base frame; 2. Intermediate rod; 3. Mounting sleeve; 4. Rotating plate; 5. Locking block; 6. Abutment block; 7. Insert sleeve; 8. Push plate; 9. Locking groove; 10. Rotating sleeve; 11. Center rod; 12. Spiral groove; 13. Sliding sleeve; 14. Sliding block; 15. Support cylinder; 16. Push block; 17. Tension spring; 18. Mounting bracket; 19. Connecting block; 20. Connecting groove; 21. Limiting rod; 22. Locking block; 23. Locking groove; 24. Locking sleeve; 25. Push spring; 26. Return spring; 27. Guide groove; 28. Guide plate; 29. ​​Top rod. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise indicated, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0028] In the utility model, in the case where no opposite statement is made, the orientation such as "upper, lower" is usually for the direction shown in the drawing, or for the vertical, perpendicular or gravity direction; similarly, for the convenience of understanding and description, "left, right" is usually for the left and right shown in the drawing; "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the utility model.

[0029] Please refer to Figures 1-5 A LED lamp assembly lamp stand, including the chassis 1, the chassis 1 top is equipped with the intermediate pole 2, the intermediate pole 2 top is provided with the top pole 29, the intermediate pole 2 both ends are provided with quick -mounting mechanism, quick -mounting mechanism includes installation sleeve 3, the rotating plate 4, the clamping block 5, the block 6, the insert sleeve 7, the push plate 8, the clamping groove 9 and quick -detachable mechanism, installation sleeve 3 is installed at the top end of chassis 1 with the top end of center pole 11, rotating plate 4 is provided with multiple groups of rotating installation in the outer wall of installation sleeve 3, clamping block 5 is installed at the top end of multiple rotating plate 4, block 6 is installed at the bottom end of multiple rotating plate 4, insert sleeve 7 is inserted in installation sleeve 3, push plate 8 is provided with multiple groups of sliding in the outer wall of insert sleeve 7, clamping groove 9 is provided with multiple groups of distribution in the outer wall of insert sleeve 7, quick -detachable mechanism includes rotating sleeve 10, center pole 11, spiral groove 12, sliding sleeve 13, sliding block 14, support cylinder 15, push block 16 and tension spring 17, rotating sleeve 10 is rotatingly installed at the top end of insert sleeve 7, center pole 11 is installed at the bottom end of rotating sleeve 10, spiral groove 12 is provided in the outer wall of center pole 11, sliding sleeve 13 is sliding in the outer wall of center pole 11, sliding block 14 is installed in the inner wall of sliding sleeve 13 and is slidably connected with spiral groove 12, support sleeve is installed in insert sleeve 7, push block 16 is installed in the inner side of multiple push plate 8 and is slidably connected with support cylinder 15, and tension spring 17 is provided with multiple groups and is connected with support sleeve and multiple push plate 8 respectively.

[0030] The top end of the top pole 29 is provided with a mounting rack 18, and the mounting rack 18 is used for mounting a lamp. This design enables the top pole 29 to stably support the mounting rack 18, thereby providing a stable foundation for the installation of the lamp, ensuring that the lamp is not easy to shake or fall during use, and increasing the safety in use.

[0031] A plurality of connecting blocks 19 are installed on the outer side of the plurality of push plates 8, and a connecting groove 20 is formed in the outer wall of the insert sleeve 7. The connecting groove 20 is provided with multiple groups and is slidably connected with the multiple connecting blocks 19. By slidably connecting the connecting blocks 19 with the connecting grooves 20 of the insert sleeve 7, the close cooperation between the push plates 8 and the insert sleeve 7 can be effectively realized, ensuring that the push plates 8 can move smoothly during operation, and at the same time, the stability and smoothness of the entire system are enhanced.

[0032] The bottom end of the plurality of push blocks 16 abuts against the outer wall of the sliding sleeve 13. The contact between the push blocks 16 and the sliding sleeve 13 ensures that the push blocks 16 can accurately and stably cooperate with the sliding sleeve 13 during operation. This design increases the friction between the components, thereby improving the stability of the push blocks 16 and avoiding errors caused by unstable sliding.

[0033] The insertion sleeve 7 is provided with a plurality of limiting rods 21, which are in sliding connection with the sliding sleeve 13. The design of the limiting rods 21 effectively prevents excessive displacement of the insertion sleeve 7 during sliding, limiting its movable range and ensuring accurate cooperation between the insertion sleeve 7 and the sliding sleeve 13, thereby avoiding misalignment or looseness during installation.

[0034] The two sets of rotating sleeves 10 are respectively fixedly connected with the bottom end of the jacks 29 and the bottom end of the central rod 11. The fixed connection of the rotating sleeves 10 with the jacks 29 and the central rod 11 ensures that the rotating sleeves can work stably during operation, preventing the connection from loosening or misaligning and affecting the operation of the overall device, thereby enhancing the reliability and accuracy of the overall system.

[0035] In this embodiment, when assembling the lamp holder, the mounting sleeve 3 and the insertion sleeve 7 are inserted, at this time the sliding sleeve 13 is at the bottom end of the central rod 11, the outer wall of the sliding sleeve 13 abuts against the bottom end of the plurality of push blocks 16, causing the plurality of push blocks 16 to push the push plates 8 to be fixed to the outer wall of the insertion sleeve 7 while stretching the plurality of tension springs 17, the outer wall of the insertion sleeve 7 pushes the abutting blocks 6 to rotate outward, the rotating plate 4 is rotated to drive the clamping blocks 5 to be clamped in the clamping grooves 9, at this time the plurality of push plates 8 abut against the inner side of the plurality of abutting blocks 6, causing the insertion sleeve 7 to be fixedly connected with the mounting sleeve 3, the quick-mounting mechanisms arranged at both ends of the intermediate rod 2 are operated in turn, then the position of the rotating sleeve 10 is limited by the positioning mechanism, and the assembly of the lamp holder is completed. When disassembling, the positioning mechanism is released to limit the rotating sleeve 10, the rotating sleeve 10 is rotated to drive the central rod 11 to rotate, the central rod 11 is in sliding connection with the sliding block 14 through the spiral groove 12, causing the sliding sleeve 13 to slide along the central rod 11 and the limiting rod 21, the abutment of the plurality of push blocks 16 is released, the push plates 8 are moved inward by the elastic reset of the plurality of tension springs 17, the abutment of the plurality of abutting blocks 6 is released, then the clamping blocks 5 are disengaged from the clamping grooves 9 by rotating the rotating plate 4, thereby releasing the clamping of the insertion sleeve 7, then the fixed connection of the quick-mounting mechanism is released, the quick-mounting mechanisms arranged at both ends of the intermediate rod 2 are operated in turn, and the disassembly of the lamp holder is completed.

[0036] Please refer to Figure 5As an embodiment of the positioning mechanism: the rotating sleeve 10 is provided with a positioning mechanism, which includes a locking block 22, a locking groove 23, a locking sleeve 24, a push spring 25 and a reset spring 26. The locking block 22 is provided with multiple groups and is slidingly installed on the outer wall of the rotating sleeve 10. The locking groove 23 is provided with multiple groups distributed on the outer wall of the plug sleeve 7. The locking sleeve 24 is slidingly installed on the outer wall of the rotating sleeve 10. The push spring 25 is provided with multiple groups and the two ends are respectively connected with the locking sleeve 24 and the rotating sleeve 10. The reset spring 26 is provided with multiple groups and is installed on the inner side of the multiple locking blocks 22 and connected with the outer wall of the rotating sleeve 10.

[0037] The outer wall of the rotating sleeve 10 is provided with a guide groove 27, and the inner wall of the locking sleeve 24 is provided with a guide plate 28. The guide groove 27 and the guide plate 28 are provided with multiple groups and are slidingly connected. The design of the guide groove 27 and the guide plate 28 makes the locking sleeve 24 slide smoothly on the outer wall of the rotating sleeve 10, reduces friction and ensures smoothness during operation. This structure design also reduces the wear of the system and prolongs the service life.

[0038] More specifically, the locking sleeve 24 is pushed by the push spring 25, and the locking sleeve 24 slides along the guide groove 27 through the guide plate 28, so that the inner wall of the locking sleeve 24 abuts and presses the outer side of the multiple locking blocks 22, and the bottom end of the multiple locking blocks 22 is clamped in the locking groove 23 and extruded on the multiple reset springs 26. At this time, the rotating sleeve 10 is in a locked state. When it is necessary to unlock, the locking sleeve 24 is pushed to slide and extrude the multiple push springs 25, so as to remove the abutment of the multiple locking blocks 22. The locking block 22 is slidingly pushed outward by the elastic reset of the multiple reset springs 26, so that the bottom end of the multiple locking blocks 22 moves out of the locking groove 23, and the locking of the rotating sleeve 10 is released.

[0039] In summary, when the overall device is in use or operation: when assembling the lamp holder, the mounting sleeve 3 and the plug sleeve 7 are inserted, at this time the sliding sleeve 13 is at the bottom end of the center rod 11, the outer wall of the sliding sleeve 13 abuts the bottom end of the plurality of push blocks 16, so that the plurality of push blocks 16 push the push plate 8 to be fixed to the outer wall of the plug sleeve 7 and stretch the plurality of tension springs 17, the plug sleeve 7 pushes the abutting block 6 to rotate outward, the rotating plate 4 is rotated to drive the clamping block 5 to be clamped in the clamping groove 9, at this time the plurality of push plates 8 abut the inner side of the plurality of abutting blocks 6, so that the plug sleeve 7 and the mounting sleeve 3 are fixedly connected, the quick mounting mechanism arranged at both ends of the intermediate rod 2 is operated in turn, and then the position of the rotating sleeve 10 is limited by the positioning mechanism, the assembly of the lamp holder is completed, when disassembly is needed, the positioning mechanism is released to limit the rotating sleeve 10, the rotating sleeve 10 is rotated to drive the center rod 11 to rotate, the center rod 11 is slidably connected with the sliding block 14 through the spiral groove 12, so that the sliding sleeve 13 slides along the center rod 11 and the limiting rod 21, the abutment of the plurality of push blocks 16 is released, the push plate 8 is moved inward by the elastic reset of the plurality of tension springs 17, the abutment of the plurality of abutting blocks 6 is released, and then the rotating plate 4 is rotated to drive the plurality of clamping blocks 5 to be separated from the clamping groove 9, so that the clamping of the plug sleeve 7 is released, and then the fixed connection of the quick mounting mechanism is released, the quick mounting mechanism arranged at both ends of the intermediate rod 2 is operated in turn, and the disassembly of the lamp holder is completed.

[0040] The lock sleeve 24 is pushed by the push spring 25 and slides along the guide groove 27 through the guide plate 28, so that the inner wall of the lock sleeve 24 abuts and presses the outer side of the plurality of lock blocks 22, so that the bottom end of the plurality of lock blocks 22 is clamped in the lock groove 23 and the plurality of reset springs 26 are extruded, at this time the rotating sleeve 10 is in the locked state, when unlocking is needed, the lock sleeve 24 is pushed to slide and extrude the plurality of push springs 25, so that the abutment of the plurality of lock blocks 22 is released, the lock blocks 22 are pushed to slide outward by the elastic reset of the plurality of reset springs 26, so that the bottom end of the plurality of lock blocks 22 moves out of the lock groove 23, and the locking of the rotating sleeve 10 is released.

[0041] In all the schemes mentioned above, the connection between the two components can be selected according to the actual situation, such as welding, bolt and nut cooperation connection, bolt or screw connection or other known connection mode, which will not be described one by one, whenever fixed connection is involved in the above, welding is preferred, although the embodiments of the utility model have been shown and described, those skilled in the art can understand that the embodiments can be variously changed, modified, replaced and modified without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An LED lamp assembly fixture comprising a base frame (1), characterized by: The middle rod (2) is arranged above the chassis (1), the top rod (29) is arranged above the middle rod (2), the quick mounting mechanism is arranged at both ends of the middle rod (2), the quick mounting mechanism comprises a mounting sleeve (3), a rotating plate (4), a clamping block (5), an abutting block (6), a plug sleeve (7), a push plate (8), a clamping groove (9) and a quick release mechanism, the mounting sleeve (3) is mounted at the top end of the chassis (1) and the top end of the center rod (11), the rotating plate (4) is arranged outside the mounting sleeve (3) in multiple groups, the clamping block (5) is mounted at the top end of the multiple rotating plates (4), the abutting block (6) is mounted at the bottom end of the multiple rotating plates (4), the plug sleeve (7) is inserted into the mounting sleeve (3), the push plate (8) is arranged outside the plug sleeve (7) in multiple groups, the clamping groove (9) is arranged outside the plug sleeve (7) in multiple groups, the quick release mechanism comprises a rotating sleeve (10), a center rod (11), a spiral groove (12), a sliding sleeve (13), a sliding block (14), a supporting cylinder (15), a push block (16) and a tension spring (17), the rotating sleeve (10) is rotatably mounted at the top end of the plug sleeve (7), the center rod (11) is mounted at the bottom end of the rotating sleeve (10), the spiral groove (12) is arranged outside the center rod (11), the sliding sleeve (13) is slidably arranged outside the center rod (11), the sliding block (14) is slidably connected with the spiral groove (12) and mounted inside the sliding sleeve (13), the supporting sleeve is mounted inside the plug sleeve (7), the push block (16) is slidably connected with the supporting cylinder (15) and mounted inside the multiple push plates (8), the tension spring (17) is arranged in multiple groups and connected with the supporting sleeve and the multiple push plates (8) respectively.

2. The LED lamp assembly of claim 1, wherein: The mounting rack (18) is mounted at the top end of the top rod (29) and used for mounting a lamp.

3. The LED lamp assembly of claim 2, wherein the plurality of groups of LEDs are arranged in a circular pattern. 5 The connecting block (19) is mounted outside the push plate (8), the connecting groove (20) is formed in the outer wall of the plug sleeve (7), and the connecting groove (20) is arranged in multiple groups and slidably connected with the multiple connecting blocks (19) respectively.

4. The LED lamp assembly of claim 3, wherein: The bottom end of the multiple push blocks (16) abuts against the outer wall of the sliding sleeve (13).

5. An LED lamp assembly fixture according to claim 4, characterized in that: The limiting rod (21) is arranged inside the plug sleeve (7) in multiple groups and slidably connected with the sliding sleeve (13).

6. An LED lamp assembly fixture according to claim 5, characterized in that: The two rotating sleeves (10) are fixedly connected with the bottom end of the top rod (29) and the bottom end of the center rod (11) respectively.

7. An LED lamp assembly fixture according to claim 6, characterized in that: The positioning mechanism is arranged on the rotating sleeve (10) and comprises a locking block (22), a locking groove (23), a locking sleeve (24), a push spring (25) and a reset spring (26), the locking block (22) is arranged in multiple groups and slidably mounted outside the rotating sleeve (10), the locking groove (23) is arranged in multiple groups and distributed outside the plug sleeve (7), the locking sleeve (24) is slidably arranged outside the rotating sleeve (10), the push spring (25) is arranged in multiple groups and connected with the locking sleeve (24) and the rotating sleeve (10) at both ends, and the reset spring (26) is arranged in multiple groups and mounted inside the multiple locking blocks (22) and connected with the outer wall of the rotating sleeve (10).

8. An LED lamp assembly fixture according to claim 7, characterized by: The rotating sleeve (10) is provided with a guide groove (27) on the outer wall, the lock sleeve (24) is provided with a guide plate (28) on the inner wall, and the guide groove (27) and the guide plate (28) are all provided with multiple groups and are in sliding connection.

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