Novel assembly type decoration structure and mounting process thereof

Through height adjustment and fixing mechanism, the problems of metal ceiling panels are limited, easy to sink and loose, and the dimension adjustment and stable fixation of ceiling panels are achieved, and the assembly convenience and service life are improved.

CN119308466AInactive Publication Date: 2025-01-14SHENGJIE ARCHITECTURAL DECORATION CO LTD
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Patent Information

Application Number
CN202411304897.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-19
Publication Date
2025-01-14
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing metal integrated ceiling panels have limited panel width, easy to sink, easy to loosen and untidy installation, which affect their aesthetics and service life.

Method used

The height adjustment mechanism, vertical adjustment fixing mechanism and horizontal adjustment fixing mechanism are adopted to realize the height, vertical and horizontal of the ceiling plate by connecting the sleeve, operating sleeve, moving adjustment threaded sleeve, limit strip and buffer spring. Adjust and clamp to ensure that the plate surface is flat and stable.

Benefits of technology

The height and size of the ceiling panel are freely adjusted, which enhances assembly convenience, and ensures the service life of the board through buffering ply plates to avoid loosening and falling off.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a novel assembly type decoration structure and an installation technology thereof, relates to the field of building decoration, and provides the following scheme that the novel assembly type decoration structure comprises an installation plate and further comprises a height adjusting mechanism used for adjusting the height size of equipment; the height adjusting mechanism comprises a connecting sleeve fixedly connected with the bottom of the mounting plate and an operating sleeve rotationally connected with the connecting sleeve; and the vertical adjusting and fixing mechanism is used for carrying out vertical size adjustment on the equipment and carrying out thickness clamping and fixing on the spliced suspended ceiling plate main body. According to the invention, rapid adjustment treatment can be carried out according to the actual height of a suspended ceiling; and meanwhile, the size can be rapidly adjusted according to the suspended ceiling plate bodies of different sizes, the spliced suspended ceiling plate bodies are rapidly clamped and fixed, the convenience of the assembly type decoration structure is effectively improved, and the service life of the suspended ceiling plate bodies is effectively prolonged.
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Description

Technical Field

[0001] The invention relates to the field of building decoration, and in particular to a novel assembled decoration structure and an installation process thereof. Background Art

[0002] At present, the mainstream metal integrated ceiling panels mainly include hooking structural panels made of aluminum gussets and aluminum veneers. The main advantages are lightness and easy installation. The disadvantages are:

[0003] 1. The board width is limited and cannot be made very large;

[0004] 2. The middle part of the board will sink due to gravity, affecting the appearance;

[0005] 3. The metal gusset is fixed by the protrusions on the side with friction. After long-term use, it is easy to loosen or even fall off due to the influence of room airflow;

[0006] 4. It is difficult to make the interface uniform after installation, which affects the appearance;

[0007] If you want to make the surface of the metal aluminum plate flat, you will inevitably need to increase the thickness of the aluminum plate, and the aluminum consumption will increase accordingly. Is there an assembled metal plate integrated ceiling structure that should be easy to assemble and each piece can be disassembled and assembled separately, and it should be easy to assemble and disassemble, and it should be difficult to fall off during long-term use. For this reason, we proposed a new assembled decorative structure and its installation process. Summary of the invention

[0008] The present invention provides a novel assembled decorative structure and an installation process thereof to solve the above-mentioned deficiencies in the prior art.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A novel assembled decorative structure includes a mounting plate and:

[0011] A height adjustment mechanism, which is used to adjust the height of the device, and includes a connecting sleeve fixedly connected to the bottom of the mounting plate and an operating sleeve rotatably connected to the connecting sleeve;

[0012] A vertical adjustment fixing mechanism, which is used to adjust the vertical size of the equipment and clamp and fix the thickness of the ceiling board body to be spliced, and the vertical adjustment fixing mechanism includes a movable adjustment threaded sleeve and a first placement plate fixedly connected to one end of the movable adjustment threaded sleeve;

[0013] A transverse adjustment fixing mechanism is used to adjust the transverse size of the equipment and to laterally clamp and fix the spliced ​​ceiling panel body. The transverse adjustment fixing mechanism includes a connecting bracket fixedly connected to a movable adjustment threaded sleeve, a second adjustment threaded rod symmetrically rotatably connected to the bottom of the connecting bracket, and a movable frame threadedly sleeved with the second adjustment threaded rod.

[0014] Furthermore, the height adjustment mechanism also includes a limit bar fixedly connected to the bottom of the mounting plate, the limit bar is fixedly sleeved inside the connecting sleeve, and movably sleeved inside the operating sleeve, the operating sleeve is threadedly connected to the movable adjustment threaded sleeve, a first limit groove is opened on the upper part of the interior of the movable adjustment threaded sleeve, and the limit bar is movably sleeved inside the first limit groove.

[0015] Furthermore, the vertical adjustment fixing mechanism also includes a mounting hole opened at the bottom of the first placement plate, the internal movable sleeve of the mounting hole is provided with a first adjusting threaded rod, a movable groove is opened at the lower part of the movable adjusting threaded sleeve, one end of the first adjusting threaded rod is rotatably connected to the inner part of the movable groove, a movable groove is symmetrically opened at the lower part of the movable adjusting threaded sleeve, the movable groove runs through the interior of the movable groove, the internal movable sleeve of the movable groove is provided with a movable plate, a threaded hole is opened on the movable plate corresponding to the first adjusting threaded rod, and the first adjusting threaded rod is threadedly sleeved inside the threaded hole.

[0016] Furthermore, the movable plate is symmetrically fixedly connected with a linkage frame on both sides, and a plurality of movable holes are respectively opened on the two linkage frames, and a limit connecting rod is movably sleeved inside the plurality of movable holes, and one end of the plurality of limit connecting rods is fixedly connected with a clamping plate, and a buffer spring is fixedly connected to the top of the clamping plate and the linkage frame bracket, and the limit connecting rod is movably sleeved inside the buffer spring, and a limit rod is fixedly connected between the bottom of the connecting bracket and the first placement plate, and a limit hole is opened on the movable plate corresponding to the limit rod, and the limit rod is movably sleeved inside the limit hole.

[0017] Furthermore, the lateral adjustment fixing mechanism also includes a trapezoidal slider fixedly connected to one end of the connecting bracket, a trapezoidal slide groove is provided on the movable frame corresponding to the trapezoidal slider, the trapezoidal slider is movably sleeved inside the trapezoidal slide groove, one end of the movable frame is fixedly connected to a limiting slider, a second limiting slide groove is provided on the connecting bracket corresponding to the limiting slider, the limiting slide groove is movably sleeved inside the second limiting slide groove, and the other end of the movable frame is fixedly connected to a second placement plate.

[0018] Furthermore, the cross section of the limiting strip is a rectangle, the inner cross section of the first limiting groove is a rectangle of the same type as the rectangle of the limiting strip, and a plurality of mounting holes are arranged in an array on the mounting plate.

[0019] A novel assembly type decoration and decoration structure installation process, which is applicable to any one of the novel assembly type decoration and decoration structures described above, comprises the following steps:

[0020] Step 1: Fix the mounting plate at the designated position with fixing bolts;

[0021] Step 2: After the mounting plate is installed and fixed, the operating sleeve is rotated according to the height of the ceiling. The rotation of the operating sleeve drives the movable adjustment threaded sleeve to slowly move up and down along the limit bar through the first limit groove. The up and down movement of the movable adjustment threaded sleeve synchronously drives the first placement plate and the second placement plate to adjust the height of the ceiling;

[0022] Step 3: After the height adjustment is completed, the second adjusting threaded rod is rotated according to the main body of the ceiling board to be installed. The rotation of the second adjusting threaded rod drives the moving frame to move smoothly along the second limiting sliding groove through the limiting sliding block. When the moving frame moves, the second placement plate is driven to move synchronously. When the second placement plate moves to abut against the side of the main body of the ceiling board, the rotation operation of the second adjusting threaded rod is stopped, and the main body of the ceiling board is horizontally limited.

[0023] Step 4: After the lateral size adjustment is completed, the movable plate is driven to move smoothly along the movable groove by rotating the first threaded rod. The movement of the movable plate synchronously drives the linkage frame to move, and the movement of the linkage frame drives the synchronous movement of the limit connecting rod. The movement of the limit connecting rod drives the movement of the clamping plate. When the clamping plate contacts the main body of the ceiling board, the rotation operation of the first adjusting threaded rod is stopped. At the same time, the clamping plate is clamped and buffered by the buffer spring, so that the main body of the ceiling board is buffered when it is squeezed, which effectively guarantees the service life of the main body of the ceiling board.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The invention adjusts the height and size of the equipment freely by installing a height adjustment mechanism, a vertical adjustment fixing mechanism, and a horizontal adjustment fixing mechanism, and clamps and fixes the main body of the ceiling board;

[0026] To sum up, the equipment has novel design and simple operation. It can not only quickly adjust according to the actual height of the ceiling, but also quickly adjust the size of ceiling panels of different sizes, and quickly clamp and fix the spliced ​​ceiling panels, which effectively improves the convenience of the assembled decoration structure and ensures the service life of the ceiling panel body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1This is a schematic diagram of the overall top view of a novel assembled decorative structure proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the overall upward-looking three-dimensional structure of a new type of assembled decorative structure proposed by the present invention;

[0029] Figure 3 It is a bottom-up stereoscopic structural schematic diagram of a partial cross-section of a limiting strip, a connecting sleeve and an operating sleeve of a novel assembled decorative structure proposed by the present invention;

[0030] Figure 4 This is a top view of a three-dimensional structure diagram of a moving plate, a linkage frame and a clamping plate of a novel assembled decoration structure proposed by the present invention;

[0031] Figure 5 A top-down perspective structural diagram of a moving frame, a limiting slider, a trapezoidal slide and a second placement plate of a novel assembled decoration structure proposed by the present invention;

[0032] Figure 6 It is a partial cross-sectional bottom-up three-dimensional structural schematic diagram of a lateral adjustment fixing mechanism of a novel assembled decorative structure proposed by the present invention;

[0033] Figure 7 This is a top view of the three-dimensional structure of a movable and adjustable threaded sleeve of a new type of assembled decorative structure proposed by the present invention.

[0034] Description of reference numerals:

[0035] 1. Mounting plate; 2. Connecting sleeve; 3. Limiting strip; 4. Operating sleeve; 5. Moving and adjusting threaded sleeve; 6. First placement plate; 7. First adjusting threaded rod; 8. Moving plate; 9. Linking frame; 10. Limiting connecting rod; 11. Clamp; 12. Buffer spring; 13. Limiting rod; 14. Connecting bracket; 15. Second adjusting threaded rod; 16. Moving frame; 17. Second placement plate; 18. Trapezoidal slider; 19. Trapezoidal slide groove; 20. Second limiting slide groove; 21. Limiting slider. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] Example 1

[0040] Reference Figure 1-7 : A novel assembled decoration structure includes a mounting plate 1, and also includes: a height adjustment mechanism, the height adjustment mechanism is used to adjust the height size of the equipment, the height adjustment mechanism includes a connecting sleeve 2 fixedly connected to the bottom of the mounting plate 1 and an operating sleeve 4 rotatably connected to the connecting sleeve 2, the height adjustment mechanism also includes a limit strip 3 fixedly connected to the bottom of the mounting plate 1, the limit strip 3 is fixedly sleeved inside the connecting sleeve 2, and movably sleeved inside the operating sleeve 4, the operating sleeve 4 is threadedly connected to a movable adjustment threaded sleeve 5, a first limit groove is opened on the upper part of the movable adjustment threaded sleeve 5, and the limit strip 3 is movably sleeved inside the first limit groove;

[0041] A vertical adjustment fixing mechanism, which is used to adjust the vertical size of the equipment and clamp and fix the thickness of the main body of the spliced ​​ceiling board. The vertical adjustment fixing mechanism includes a movable adjustment threaded sleeve 5 and a first placement plate 6 fixedly connected to one end of the movable adjustment threaded sleeve 5. The vertical adjustment fixing mechanism also includes a mounting hole opened at the bottom of the first placement plate 6, and a first adjustment threaded rod 7 is movably sleeved inside the mounting hole. A movable groove is opened at the lower part of the movable adjustment threaded sleeve 5, and one end of the first adjustment threaded rod 7 is rotatably connected to the inside of the movable groove. A movable groove is symmetrically opened at the lower part of the movable adjustment threaded sleeve 5, and the movable groove runs through the inside of the movable groove. A movable plate 8 is movably sleeved inside the movable groove. A threaded hole is opened on the movable plate 8 corresponding to the first adjustment threaded rod 7, and the first adjustment threaded rod 7 is threadedly sleeved inside the threaded hole.

[0042] A transverse adjustment fixing mechanism is used to adjust the transverse size of the equipment and to laterally clamp and fix the main body of the spliced ​​ceiling panel. The transverse adjustment fixing mechanism includes a connecting bracket 14 fixedly connected to a movable adjustment threaded sleeve 5, a second adjustment threaded rod 15 symmetrically connected to the bottom of the connecting bracket 14, and a movable frame 16 threadedly sleeved with the second adjustment threaded rod 15. The transverse adjustment fixing mechanism also includes a trapezoidal slider 18 fixedly connected to one end of the connecting bracket 14, a trapezoidal slide groove 19 is provided on the movable frame 16 corresponding to the trapezoidal slider 18, and the trapezoidal slider 18 is movably sleeved inside the trapezoidal slide groove 19. One end of the movable frame 16 is fixedly connected to a limiting slider 21, a second limiting slide groove 20 is provided on the connecting bracket 14 corresponding to the limiting slider 21, and the limiting slider 21 is movably sleeved inside the second limiting slide groove 20. The other end of the movable frame 16 is fixedly connected to a second placement plate 17.

[0043] In the present invention, linkage frames 9 are symmetrically fixedly connected on both sides of the movable plate 8, a plurality of movable holes are respectively opened on the two linkage frames 9, and limit connecting rods 10 are movably sleeved inside the plurality of movable holes, a clamping plate 11 is fixedly connected at one end of the plurality of limit connecting rods 10, a buffer spring 12 is fixedly connected to the top of the clamping plate 11 and the linkage frame 9 bracket, the limit connecting rod 10 is movably sleeved inside the buffer spring 12, a limit rod 13 is fixedly connected between the bottom of the connecting bracket 14 and the first placement plate 6, a limit hole is opened on the movable plate 8 corresponding to the limit rod 13, and the limit rod 13 is movably sleeved inside the limit hole.

[0044] In the present invention, the cross section of the limiting strip 3 is a rectangle, the inner cross section of the first limiting groove is the same type of rectangle as the limiting strip 3 , and a plurality of mounting holes are arranged in an array on the mounting plate 1 .

[0045] Example 2

[0046] This embodiment provides a technical solution based on the first embodiment: a new type of assembled decorative structure installation process, which is applicable to any one of the above-mentioned new type of assembled decorative structure, including the following steps:

[0047] Step 1: Fix the mounting plate 1 at the designated position with fixing bolts;

[0048] Step 2: After the mounting plate 1 is installed and fixed, the operating sleeve 4 is rotated according to the height of the ceiling. The rotation of the operating sleeve 4 drives the movable adjustment threaded sleeve 5 to slowly move up and down along the limit bar 3 through the first limit groove. The up and down movement of the movable adjustment threaded sleeve 5 synchronously drives the first placement plate 6 and the second placement plate 17 to adjust the height of the ceiling;

[0049] Step 3: After the height adjustment is completed, the second adjusting threaded rod 15 is rotated according to the main body of the ceiling board to be installed. The rotation of the second adjusting threaded rod 15 drives the moving frame 16 to move smoothly along the second limiting slide groove 20 through the limiting slider 21. When the moving frame 16 moves, it drives the second placement plate 17 to move synchronously. When the second placement plate 17 moves to abut against the side of the ceiling board main body, the rotation operation of the second adjusting threaded rod 15 is stopped, and the ceiling board main body is horizontally limited.

[0050] Step 4: After the lateral size adjustment is completed, the moving plate 8 is driven to move smoothly along the movable groove by rotating the first threaded rod 7. The movement of the moving plate 8 synchronously drives the linkage frame 9 to move. The movement of the linkage frame 9 drives the synchronous movement of the limiting connecting rod 10. The movement of the limiting connecting rod 10 drives the movement of the clamping plate 11. When the clamping plate 11 contacts the main body of the ceiling panel, the rotation operation of the first adjusting threaded rod 7 is stopped. At the same time, the clamping plate 11 is clamped and buffered by the buffer spring 12, so that the main body of the ceiling panel is buffered when it is squeezed, thereby effectively ensuring the service life of the main body of the ceiling panel.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel assembled decorative structure, comprising a mounting plate (1), characterized in that: Also includes: A height adjustment mechanism, the height adjustment mechanism is used to adjust the height of the device, the height adjustment mechanism comprises a connecting sleeve (2) fixedly connected to the bottom of the mounting plate (1) and an operating sleeve (4) rotatably connected to the connecting sleeve (2); A vertical adjustment fixing mechanism, the vertical adjustment fixing mechanism is used to adjust the vertical size of the equipment and to clamp and fix the thickness of the ceiling board body to be spliced, the vertical adjustment fixing mechanism comprises a movable adjustment threaded sleeve (5) and a first placement plate (6) fixedly connected to one end of the movable adjustment threaded sleeve (5); A transverse adjustment fixing mechanism is used to adjust the transverse size of the equipment and to clamp and fix the main body of the spliced ​​ceiling panel transversely. The transverse adjustment fixing mechanism comprises a connecting bracket (14) fixedly connected to a movable adjustment threaded sleeve (5), a second adjustment threaded rod (15) symmetrically rotationally connected to the bottom of the connecting bracket (14), and a movable frame (16) threadedly sleeved on the second adjustment threaded rod (15).

2. A novel assembled decorative structure according to claim 1, characterized in that: The height adjustment mechanism further comprises a limit strip (3) fixedly connected to the bottom of the mounting plate (1); the limit strip (3) is fixedly sleeved inside the connecting sleeve (2) and movably sleeved inside the operating sleeve (4); the operating sleeve (4) is threadedly connected to the movable adjustment threaded sleeve (5); a first limit slot is provided on the upper part of the movable adjustment threaded sleeve (5); and the limit strip (3) is movably sleeved inside the first limit slot.

3. A novel assembled decorative structure according to claim 1, characterized in that: The vertical adjustment fixing mechanism also includes a mounting hole opened at the bottom of the first placement plate (6), a first adjusting threaded rod (7) is movably sleeved inside the mounting hole, a movable groove is opened at the lower part of the movable adjusting threaded sleeve (5), one end of the first adjusting threaded rod (7) is rotatably connected to the inside of the movable groove, a movable groove is symmetrically opened at the lower part of the movable adjusting threaded sleeve (5), the movable groove runs through the inside of the movable groove, a movable plate (8) is movably sleeved inside the movable groove, a threaded hole is opened on the movable plate (8) corresponding to the first adjusting threaded rod (7), and the first adjusting threaded rod (7) is threadedly sleeved inside the threaded hole.

4. The novel assembled decorative structure according to claim 3 is characterized in that: The two sides of the movable plate (8) are symmetrically fixedly connected with the linkage frames (9), and a plurality of movable holes are respectively opened on the two linkage frames (9), and the interiors of the plurality of movable holes are movably sleeved with limit connecting rods (10), and one end of the plurality of limit connecting rods (10) is fixedly connected with a clamping plate (11), and the top of the clamping plate (11) and the linkage frame (9) bracket are fixedly connected with a buffer spring (12), and the limit connecting rod (10) is movably sleeved inside the buffer spring (12), and a limit rod (13) is fixedly connected between the bottom of the connection bracket (14) and the first placement plate (6), and a limit hole is opened on the movable plate (8) corresponding to the limit rod (13), and the limit rod (13) is movably sleeved inside the limit hole.

5. The novel assembled decorative structure according to claim 1 is characterized in that: The lateral adjustment fixing mechanism also includes a trapezoidal slider (18) fixedly connected to one end of the connecting bracket (14); a trapezoidal slide groove (19) is provided on the movable frame (16) at a position corresponding to the trapezoidal slider (18); the trapezoidal slider (18) is movably sleeved inside the trapezoidal slide groove (19); one end of the movable frame (16) is fixedly connected to a limiting slider (21); a second limiting slide groove (20) is provided on the connecting bracket (14) at a position corresponding to the limiting slider (21); the limiting slider (21) is movably sleeved inside the second limiting slide groove (20); and the other end of the movable frame (16) is fixedly connected to a second placement plate (17).

6. A novel assembled decorative structure according to claim 2, characterized in that: The cross section of the limiting strip (3) is a rectangle, the internal cross section of the first limiting groove is a rectangle of the same type as the rectangle of the limiting strip (3), and a plurality of mounting holes are arranged in an array on the mounting plate (1).

7. A novel assembly type decoration and furnishing structure installation process, which is applicable to a novel assembly type decoration and furnishing structure as claimed in any one of claims 1 to 6, characterized in that: The steps include: Step 1: Fix the mounting plate (1) at the designated position by fixing bolts; Step 2: After the mounting plate (1) is installed and fixed, the operating sleeve (4) is rotated according to the height of the suspended ceiling. The rotation of the operating sleeve (4) drives the movable adjustment threaded sleeve (5) to slowly move up and down along the limiting strip (3) through the first limiting groove. The up and down movement of the movable adjustment threaded sleeve (5) synchronously drives the first placement plate (6) and the second placement plate (17) to adjust the height of the suspended ceiling; Step 3: After the height adjustment is completed, the second adjusting threaded rod (15) is rotated according to the main body of the ceiling panel to be installed. The rotation of the second adjusting threaded rod (15) drives the moving frame (16) to move smoothly along the second limiting sliding groove (20) through the limiting sliding block (21). When the moving frame (16) moves, the second placement plate (17) is driven to move synchronously. When the second placement plate (17) moves to abut against the side of the ceiling panel main body, the rotation operation of the second adjusting threaded rod (15) is stopped, and the ceiling panel main body is horizontally limited. Step 4: After the lateral size adjustment is completed, the first threaded rod (7) is rotated to drive the movable plate (8) to move smoothly along the movable groove. The movement of the movable plate (8) synchronously drives the linkage frame (9) to move, and the movement of the linkage frame (9) drives the synchronous movement of the limit connecting rod (10). The movement of the limit connecting rod (10) drives the clamping plate (11) to move. When the clamping plate (11) contacts the main body of the ceiling plate, the rotation operation of the first adjusting threaded rod (7) is stopped, and the clamping plate (11) is clamped and buffered by the buffer spring (12).