A stable high-strength aluminum curtain wall

Abstract

The invention relates to the technical field of aluminum plate curtain wall, and discloses a stable high-strength aluminum plate curtain wall, comprising a fixed wall, a side of the fixed wall is provided with bolt holes adapted to fixing bolts, a side of the fixing bolt is fixedly connected with a rear embedded plate, a side of the fixing bolt away from the fixed wall is movably connected with a fixing mechanism, a middle part of the top of the fixing mechanism is fixedly connected with an adjustment mechanism, and both sides of the fixing mechanism are movably connected with a limiting mechanism; the invention places two adapters on both sides of a placement box, and adjusts a first adjustment component and a second adjustment component. When the first adjustment component is adjusted, the moving block drives the moving plate to move outward, thereby moving one adapter, and the second adjustment component moves the other adapter, thereby ensuring the position accuracy of the two adapters. The two adapters can be adjusted separately to avoid the position of the fixing bolts affecting the dimensional accuracy of the adapters.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum plate curtain walls, and more specifically to a stable high-strength aluminum plate curtain wall. Background Art

[0002] The aluminum curtain wall is made of high-quality high-strength aluminum alloy plates. Its structure is mainly composed of embedded plates, panels, reinforcing ribs and angle brackets. The embedded plates are connected to the structure through bolts to bear the force. The angle brackets can be directly bent and stamped by the panels, or they can be riveted on the small edges of the panels. The reinforcing ribs are connected to the plate surface with electric welding screws to form a solid whole, which greatly enhances the strength and rigidity of the aluminum single-plate curtain wall and ensures its flatness and wind and earthquake resistance during long-term use.

[0003] The curtain wall aluminum plate has a unique texture, rich and lasting color, and a variety of appearance shapes. It can be perfectly combined with glass curtain wall materials and stone curtain wall materials. Its perfect appearance and excellent quality make it very popular in the market. The curtain wall aluminum plate has a light weight, so it greatly reduces the load on the building structure and foundation, and has low maintenance costs and high cost performance. Therefore, it has been widely used. Most of the curtain wall aluminum plates commonly used in the market are composite aluminum plates and aluminum alloy single plates;

[0004] When installing the aluminum curtain wall nowadays, after the rear embedded plate is fixed on the wall, the adapter needs to be welded to the rear embedded plate. The subsequent columns, beams and aluminum panels are connected based on the adapter. Therefore, the dimensional accuracy of the adapter will directly affect the overall quality of the aluminum curtain wall. However, when the adapter is welded to the rear embedded parts, it is generally fixed manually and then welded. However, the manual method will have certain errors, which will affect the quality of the aluminum curtain wall.

[0005] When installing the columns, it is difficult to fix their position due to their heavy weight. If there are errors in the overall installation process of the aluminum curtain wall, the quality of the aluminum curtain wall itself will be poor, increasing the risk of it falling. Therefore, a stable high-strength aluminum curtain wall is required. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the implementation rules of the present invention provide a stable high-strength aluminum plate curtain wall to solve the technical problems raised in the background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stable high-strength aluminum plate curtain wall, comprising a fixed wall, a bolt hole adapted to a fixing bolt is opened on a side of the fixed wall, a rear embedded plate is fixedly connected to the side of the fixing bolt away from the fixed wall, a fixing mechanism is movably connected to the middle of the top of the fixing mechanism, a limiting mechanism is movably connected to the two sides of the fixing mechanism, a transition piece is movably connected to the two sides of the adjustment mechanism, columns are fixedly connected to the inside of the two transition pieces, a beam is fixedly connected to the side of the column, and an aluminum single plate is fixedly connected to the side of the column and the beam;

[0008] The adjustment mechanism includes a placement box, a Z-shaped partition is fixedly connected to the interior of the placement box, a first adjustment component is provided on one side of the Z-shaped partition, and a second adjustment component is provided on the other side of the Z-shaped partition. The Z-shaped partition has the same structure as the first adjustment component and is centrally symmetrical. The two adapters are located on both sides of the placement box, and the two adapters are in contact with the first adjustment component and the second adjustment component respectively.

[0009] In a preferred embodiment, the first adjustment component includes an adjustable rotating wheel, the bottom end of the rotating wheel is fixedly connected to the first bevel gear, the side of the first bevel gear is movably connected to the second bevel gear, the interior of the second bevel gear is fixedly connected to a threaded rod, the side of the threaded rod is threadedly connected to a moving block, and the side of the moving block away from the threaded rod is fixedly connected to a moving plate.

[0010] In a preferred embodiment, the moving block is fixedly connected to a limiting block on the side away from the Z-shaped partition, a sliding groove for moving the limiting block is provided inside the placement box, and the threaded rod is movably connected to the side of the Z-shaped partition on the side away from the moving block.

[0011] In a preferred embodiment, the fixing mechanism includes a supporting plate, and both sides of the bottom end of the supporting plate are fixedly connected with lower connecting plates. The interior of the lower connecting plate is provided with a avoidance hole for the fixing bolt to pass through, and the side of the fixing bolt is threadedly connected with a connecting nut, and the connecting nut connects the supporting plate and the lower connecting plate with the fixing bolt.

[0012] In a preferred embodiment, a connecting slot is fixedly connected to the center of the bottom end of the support plate, a slot is provided at the bottom end of the connecting slot for the limit block to move, a slider is fixedly connected to the bottom end of the limit block, a placement plate is fixedly connected to the bottom end of the slider, the column is placed on the placement plate, the height of the limit block is greater than the height of the side opening of the connecting slot, and the width of the limit block is less than the height of the side opening of the connecting slot.

[0013] In a preferred embodiment, connecting plates are fixedly connected on both sides of the fixing mechanism, the top of the connecting plate is fixedly connected to a fixed shaft, the side of the fixed shaft is movably connected to a rotating plate, the bottom end of the rotating plate is fixedly connected to a magnetic plate, and the support plate in the fixing mechanism is made of iron material.

[0014] In a preferred embodiment, a limiting hole adapted to the limiting rod is opened on the side of the rotating plate, and the limiting rod is fixedly connected to a supporting top plate on the side away from the rotating plate. A supporting spring is provided on the side of the supporting top plate, and both ends of the supporting spring are respectively in contact with the side of the rotating plate and the side of the supporting top plate.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention places two adapters on both sides of the placement box, and adjusts the first adjustment component and the second adjustment component. When the first adjustment component is adjusted, the moving block drives the moving plate to move outward, thereby moving one adapter, and the second adjustment component moves the other adapter to ensure the position accuracy of the two adapters. The two adapters can be adjusted separately to avoid the position of the fixing bolts affecting the dimensional accuracy of the adapters.

[0017] 2. The present invention is provided with a rotating plate, a magnetic plate, and a supporting top plate. After the rotating plate rotates around the fixed axis, the magnetic plate contacts the adapter, and there is a magnetic attraction between the magnetic plate and the supporting plate, thereby fixing the position of the rear embedded plate. When the adapter moves, its interior contacts the supporting top plate and drives the supporting top plate to move. At this time, the supporting spring will be compressed, further fixing the position of the adapter, so that it will not be moved by force during welding, thereby ensuring the accuracy of the adapter after welding;

[0018] 3. The present invention places the column on the placement plate to adjust its position so that the column is connected to the adapter, and the limit block can move in the connecting slot to adjust its position, making it more convenient to connect the column to the adapter. The height of the limit block is greater than the height of the connecting slot outlet to prevent the limit block from being removed from the connecting slot and falling, and the width of the limit block is lower than the height of the connecting slot outlet. The placement plate and the limit block can be removed from the connecting slot after rotation, and the present invention is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall explosion structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the overall structure of the fixing mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of the connection structure of the fixing mechanism and the fixing bolt of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the regulating mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the explosion structure of the regulating mechanism of the present invention.

[0025] Figure 7 It is a schematic diagram of the overall structure decomposition of the limiting mechanism of the present invention.

[0026] Figure 8 It is a schematic diagram of the internal structure of the rotating plate of the present invention.

[0027] Fig. 9 It is a schematic diagram of the exploded structure below the support plate of the present invention.

[0028] Fig.10 It is a schematic diagram of the internal structure of the connecting chute of the present invention.

[0029] The reference numerals are: 1, fixed wall; 2, fixed bolt; 3, rear embedded plate; 4, fixed mechanism; 401, support plate; 402, lower connecting plate; 403, connecting nut; 404, connecting slide; 405, limit block; 406, slider; 407, placement plate; 5, adjustment mechanism; 501, placement box; 502, Z-type partition; 503, first adjustment component; 5031, rotating wheel; 5032, first bevel gear; 5033, second bevel gear; 5034, threaded rod; 5035, moving block; 5036, moving plate; 5037, limit block; 504, second adjustment component; 6, limit mechanism; 601, connecting plate; 602, fixed shaft; 603, rotating plate; 604, magnetic plate; 605, limit rod; 606, supporting top plate; 607, supporting spring; 7, adapter; 8, column; 9, beam; 10, aluminum single plate. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The stable high-strength aluminum plate curtain wall involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0031] Reference Figure 1 , Figure 2 as well as Figure 3The present invention provides a stable high-strength aluminum plate curtain wall, including a fixed wall 1, a bolt hole matched with a fixing bolt 2 is opened on the side of the fixed wall 1, a rear embedded plate 3 is fixedly connected to the side of the fixing bolt 2, a fixing mechanism 4 is movably connected to the side of the fixing bolt 2 away from the fixed wall 1, an adjusting mechanism 5 is fixedly connected to the middle of the top of the fixing mechanism 4, both sides of the fixing mechanism 4 are movably connected to a limiting mechanism 6, both sides of the adjusting mechanism 5 are movably connected to adapters 7, columns 8 are fixedly connected inside the two adapters 7, beams 9 are fixedly connected to the sides of the columns 8, and aluminum panels 10 are fixedly connected to the sides of the columns 8 and the beams 9.

[0032] In the embodiment of the present application, when installing the curtain wall, first, lines are drawn on the side of the fixed wall 1, and holes are punched after the lines are drawn, and four holes are required, so the number of fixing bolts 2 is also four, and the rear embedded plate 3 is fixedly connected to the fixing bolts 2, so it is fixed to the side of the fixed wall 1, and the rear embedded plate 3 is connected to the fixing bolts 2 through the avoidance grooves opened therein, so the rear embedded plate 3 can slide on the side of the fixing bolts 2 before being fixed, so there will be a certain error in the position of the rear embedded plate 3. If it is used as the reference of the rear embedded plate 3, it will cause dimensional deviations in the final aluminum plate curtain wall, and the present application can adjust the position of the adapter 7 so that the position of the adapter 7 is sufficiently accurate relative to the fixed wall 1, thereby ensuring the accuracy of the final aluminum plate curtain wall and making it stronger.

[0033] Reference Figure 4 , Figure 5 as well as Figure 6 The adjustment mechanism 5 includes a placement box 501, a Z-shaped partition 502 is fixedly connected inside the placement box 501, a first adjustment component 503 is provided on one side of the Z-shaped partition 502, and a second adjustment component 504 is provided on the other side of the Z-shaped partition 502. The Z-shaped partition 502 has the same structure as the first adjustment component 503 and is centrally symmetrical. Two adapters 7 are located on both sides of the placement box 501, and the two adapters 7 are in contact with the first adjustment component 503 and the second adjustment component 504 respectively. The first adjustment component 503 includes an adjustable rotating wheel 5031, and the bottom end of the rotating wheel 5031 is fixedly connected to a first bevel gear. 5032, the side of the first bevel gear 5032 is movably connected to the second bevel gear 5033, the interior of the second bevel gear 5033 is fixedly connected to a threaded rod 5034, the side of the threaded rod 5034 is threadedly connected to a moving block 5035, the side of the moving block 5035 away from the threaded rod 5034 is fixedly connected to a moving plate 5036, the side of the moving block 5035 away from the Z-shaped partition 502 is fixedly connected to a limiting block 5037, the interior of the placement box 501 is provided with a sliding groove for the movement of the limiting block 5037, and the side of the threaded rod 5034 away from the moving block 5035 is movably connected to the side of the Z-shaped partition 502.

[0034] In the embodiment of the present application, after the adapter 7 is located on both sides of the placement box 501, the first adjustment component 503 and the second adjustment component 504 can adjust the adapter 7 on both sides respectively, thereby changing the position of the adapter 7 on both sides to ensure the dimensional accuracy between the adapter 7 and the fixed wall 1. The two adapters 7 can be adjusted separately, so the two adapters 7 do not need to be distributed with the placement box 501 as the center. Therefore, when there is a certain error in the size of the fixing bolt 2, the error can also be corrected to ensure the final position. The first adjustment component 503 and the second adjustment component 504 are separated by the fixing bolt 2, so the first adjustment component 503 and the second adjustment component 504 do not interfere with each other during operation. When the first adjustment component 503 and the second adjustment component 504 are in operation, the threaded rod 5034 can be supported by the Z-shaped partition plate 502 to ensure its accuracy. When the moving block 5035 drives the moving plate 5036 to move, the limit block 5037 limits the moving position of the moving block 5035 to prevent the moving block 5035 from slipping.

[0035] Reference Figure 4 , Fig. 9 as well as Fig.10 The fixing mechanism 4 includes a supporting plate 401 that can be supported, and both sides of the bottom end of the supporting plate 401 are fixedly connected with a lower connecting plate 402. The interior of the lower connecting plate 402 is provided with a avoiding hole for the fixing bolt 2 to pass through, and the side of the fixing bolt 2 is threadedly connected with a connecting nut 403. The connecting nut 403 connects the supporting plate 401 and the lower connecting plate 402 with the fixing bolt 2. The center of the bottom end of the supporting plate 401 is fixedly connected with a connecting slide 404, and the bottom end of the connecting slide 404 is provided with a slide for the movement of a limit block 405. The bottom end of the limit block 405 is fixedly connected with a slider 406, and the bottom end of the slider 406 is fixedly connected with a placing plate 407. The column 8 is placed on the placing plate 407. The height of the limit block 405 is greater than the height of the side opening of the connecting slide 404, and the width of the limit block 405 is less than the height of the side opening of the connecting slide 404.

[0036] In the embodiment of the present application, after the connecting nut 403 is connected to the fixing bolt 2, the position of the support plate 401 can be fixed. After the support plate 401 is fixed, the column 8 can be placed on the placement plate 407. The placement plate 407 is moved and the limit block 405 is driven to move in the connecting slot 404, so that the position of the column 8 can be adjusted, so that the connection between the column 8 and the adapter 7 is sufficiently accurate. After the column 8 is connected, the limit block 405 is moved to the deepest point in the connecting slot 404, and the bottom of the placement plate 407 is moved from the column 8. The bottom of the column 8 can be moved away, and the bottom of the column 8 can cooperate with the new column 8 without affecting its normal processing. The height of the limit block 405 is greater than the height of the side opening of the connecting slide 404, and the width of the limit block 405 is less than the height of the side opening of the connecting slide 404. Therefore, the limit block 405 cannot be removed from the connecting slide 404 when it moves. The placement plate 407 and the limit block 405 are rotated ninety degrees. At this time, the limit block 405 can be taken out from the connecting slide 404. Therefore, after the overall use is completed, it can be transported separately to save transportation space.

[0037] Reference Figure 8 as well as Fig. 9 , connecting plates 601 are fixedly connected on both sides of the fixing mechanism 4, a fixed shaft 602 is fixedly connected to the top of the connecting plate 601, a rotating plate 603 is movably connected to the side of the fixed shaft 602, a magnetic plate 604 is fixedly connected to the bottom end of the rotating plate 603, the supporting plate 401 in the fixing mechanism 4 is made of iron material, a limiting hole matching the limiting rod 605 is opened on the side of the rotating plate 603, the limiting rod 605 is fixedly connected to a supporting top plate 606 away from the side of the rotating plate 603, a supporting spring 607 is provided on the side of the supporting top plate 606, and the two ends of the supporting spring 607 are respectively in contact with the side of the rotating plate 603 and the side of the supporting top plate 606.

[0038] In the embodiment of the present application, the support top plate 606 is located on the inner side of the adapter 7 away from the placement box 501, the magnetic plate 604 is in contact with the adapter 7, and the support plate 401 is made of iron material, so there is a magnetic attraction between the magnetic plate 604 and the support plate 401, and the magnetic plate 604 limits the adapter 7 to prevent the adapter 7 from sliding down during the operation of the adjustment mechanism 5, and when the adapter 7 moves, the adapter 7 contacts the support top plate 606 and drives the support top plate 606 to move and compress the support spring 607, further limiting the position of the adapter 7. At this time, the adapter 7 and the rear embedded plate 3 are welded to ensure that the adapter 7 will not move during welding, to ensure its dimensional accuracy after welding, and to improve the overall quality of the aluminum curtain wall after installation.

[0039] The working principle of the present invention is as follows: marking and punching are performed on the surface of the fixed wall 1, the fixing bolts 2 are fixed in the holes, the rear embedded plate 3 is fixed with the fixing bolts 2, at this time, the lower connecting plate 402 is passed through the fixing bolts 2, the connecting nut 403 is threadedly connected with the fixing bolts 2, the connecting nut 403 is in contact with the lower connecting plate 402 and the support plate 401 is moved toward the rear embedded plate 3, so that the support plate 401 is fixed as a whole on the side of the rear embedded plate 3;

[0040] After the support plate 401 is fixed, the two adapters 7 are placed on both sides of the placement box 501, and the support top plate 606 is located on the inner side of the adapter 7 away from the placement box 501, the magnetic plate 604 is in contact with the adapter 7, and there is a magnetic attraction between the magnetic plate 604 and the support plate 401, and the magnetic plate 604 limits the adapter 7. The first adjustment component 503 and the second adjustment component 504 are adjusted to adjust the positions of the two adapters 7. When the first adjustment component 503 is adjusted, the rotating wheel 5031 is rotated, and the rotating wheel 5031 is rotated. When 31 rotates, the first bevel gear 5032 drives the second bevel gear 5033 to rotate, and the second bevel gear 5033 drives the threaded rod 5034 inside it to rotate, thereby causing the moving block 5035 to move outward. When the moving block 5035 moves outward, it drives the moving plate 5036 to move, thereby causing one adapter 7 to move outward to adjust its position. Similarly, the second adjustment component 504 is adjusted to adjust the position of another adapter 7. The positions of the two adapters 7 are adjusted separately to ensure their position accuracy.

[0041] When the adapter 7 moves outward, the adapter 7 moves at the bottom end of the magnetic plate 604, and is prevented from sliding under the limiting effect of the magnetic plate 604. When the adapter 7 moves, the adapter 7 contacts the support top plate 606 and drives the support top plate 606 to move and compress the support spring 607, further limiting the position of the adapter 7. At this time, the adapter 7 is welded to the rear embedded plate 3 to ensure that the adapter 7 does not move during welding.

[0042] After connecting the adapter 7, place the column 8 on the placement plate 407. At this time, move the placement plate 407 and drive the limit block 405 to move in the connecting slot 404. At this time, the position of the column 8 can be adjusted so that the connection between the column 8 and the adapter 7 is sufficiently accurate. After connecting the column 8, the limit block 405 moves to the deepest point in the connecting slot 404, the bottom of the placement plate 407 is moved away from the bottom of the column 8, and the connecting nut 403 leaves from the side of the fixing bolt 2. Then, rotate the support top plate 606 from the adapter 7. At this time, it can be moved downward as a whole and used in the next place.

[0043] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims;

[0044] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stable high-strength aluminum plate curtain wall, comprising a fixed wall (1), characterized in that: The side of the fixed wall (1) is provided with a bolt hole matched with the fixing bolt (2); the side of the fixing bolt (2) is fixedly connected to a rear embedded plate (3); the side of the fixing bolt (2) away from the fixed wall (1) is movably connected to a fixing mechanism (4); the middle of the top of the fixing mechanism (4) is fixedly connected to an adjustment mechanism (5); the two sides of the fixing mechanism (4) are movably connected to a limit mechanism (6); the two sides of the adjustment mechanism (5) are movably connected to adapters (7); the insides of the two adapters (7) are fixedly connected to columns (8); the sides of the columns (8) are fixedly connected to a crossbeam (9); the sides of the columns (8) and the crossbeam (9) are fixedly connected to an aluminum single plate (10); The adjustment mechanism (5) comprises a placement box (501), a Z-shaped partition (502) is fixedly connected to the interior of the placement box (501), a first adjustment component (503) is provided on one side of the Z-shaped partition (502), and a second adjustment component (504) is provided on the other side of the Z-shaped partition (502), the Z-shaped partition (502) and the first adjustment component (503) have the same structure and are centrally symmetrical, the two adapters (7) are located on both sides of the placement box (501), and the two adapters (7) are in contact with the first adjustment component (503) and the second adjustment component (504) respectively; The fixing mechanism (4) comprises a supporting plate (401) capable of supporting, the bottom ends of the supporting plate (401) are fixedly connected to lower connecting plates (402) on both sides, the lower connecting plate (402) is provided with a clearance hole for the fixing bolt (2) to pass through, the side of the fixing bolt (2) is threadedly connected to a connecting nut (403), and the connecting nut (403) connects the supporting plate (401) and the lower connecting plate (402) with the fixing bolt (2); The center of the bottom end of the support plate (401) is fixedly connected with a connecting slot (404), the bottom end of the connecting slot (404) is provided with a slot for a limit block (405) to move, the bottom end of the limit block (405) is fixedly connected with a slider (406), the bottom end of the slider (406) is fixedly connected with a placement plate (407), the column (8) is placed on the placement plate (407), the height of the limit block (405) is greater than the height of the side opening of the connecting slot (404), and the width of the limit block (405) is less than the height of the side opening of the connecting slot (404).

2. The stable high-strength aluminum curtain wall according to claim 1, characterized in that: The first adjustment component (503) comprises an adjustable rotating wheel (5031), the bottom end of the rotating wheel (5031) is fixedly connected to a first bevel gear (5032), the side of the first bevel gear (5032) is movably connected to a second bevel gear (5033), the interior of the second bevel gear (5033) is fixedly connected to a threaded rod (5034), the side of the threaded rod (5034) is threadedly connected to a moving block (5035), and the side of the moving block (5035) away from the threaded rod (5034) is fixedly connected to a moving plate (5036).

3. The stable high-strength aluminum curtain wall according to claim 2, characterized in that: The side of the moving block (5035) away from the Z-shaped partition (502) is fixedly connected to the limiting block (5037); a sliding groove for allowing the limiting block (5037) to move is provided inside the placement box (501); and the side of the threaded rod (5034) away from the moving block (5035) is movably connected to the side of the Z-shaped partition (502).

4. The stable high-strength aluminum curtain wall according to claim 1, characterized in that: Both sides of the fixing mechanism (4) are fixedly connected to connecting plates (601), the top of the connecting plate (601) is fixedly connected to a fixing shaft (602), the side of the fixing shaft (602) is movably connected to a rotating plate (603), the bottom of the rotating plate (603) is fixedly connected to a magnetic plate (604), and the support plate (401) in the fixing mechanism (4) is made of iron material.

5. The stable high-strength aluminum curtain wall according to claim 4, characterized in that: A limiting hole matched with the limiting rod (605) is provided on the side of the rotating plate (603); a supporting top plate (606) is fixedly connected to the side of the limiting rod (605) away from the rotating plate (603); a supporting spring (607) is provided on the side of the supporting top plate (606); two ends of the supporting spring (607) are in contact with the side of the rotating plate (603) and the side of the supporting top plate (606), respectively.

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