A clamp assembly for a whiteboard

Abstract

The utility model provides a kind of clamping assembly of whiteboard, including first clamping plate and second clamping plate, both are achieved rotary connection by the shaft sleeve with notch and the built-in shaft of shaft sleeve, the shaft extends from the notch radial and is fixed in first clamping plate or second clamping plate, first clamping plate side edge and second clamping plate side edge abutment form clamping part, reset device is set at the position away from clamping part and shaft, second clamping plate is equipped with the connecting part fixed with whiteboard.The design is connected by the straight insertion type connecting structure of notch shaft sleeve and shaft, simplifies assembly procedure, and reset device can maintain the sustained abutment force of clamping part, enhances clamping stability.

Description

Technical Field

[0001] This utility model relates to the technical field of whiteboard accessories, specifically to a whiteboard, especially a writing whiteboard, and particularly a clamping component for a glass whiteboard. Background Technology

[0002] The clamping components on a whiteboard used to hold objects are commonly called paper clamps or pressing devices. They are primarily used to temporarily secure paper to the whiteboard, preventing it from shifting or lifting during writing. They use physical pressure or friction to keep the paper firmly against the whiteboard surface, ensuring smooth writing. They also typically allow for easy removal and replacement of the paper. The clamping components are usually located on the edge of the whiteboard and are mostly made of metal or plastic, using spring pressure to hold paper, sticky notes, or reference documents.

[0003] Patent documents CN215792862U and CN113459704A both relate to clamping components for whiteboards. However, existing clamping components mostly use a rotating shaft fixed by a support plate. During assembly, the first clamping plate needs to be rotatably connected to the rotating shaft before the shaft is mounted on the second clamping plate via the support plate. This manufacturing and assembly is difficult. When using plastic parts, the molten plastic may cause the rotating shaft to fail. When using a metal pin as the rotating shaft, the two ends of the pin need to be flattened or hammered to lock the pin onto the support plate, resulting in low processing efficiency. Furthermore, existing pad clamps are generally fixed on the front of the writing surface, occupying a portion of the writing surface. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a new type of whiteboard clamping component to solve at least one of the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A whiteboard clamping assembly includes a first clamping plate and a second clamping plate, which are rotatably connected along their length by a bushing with a notch and a rotating shaft inside the bushing. The rotating shaft extends radially from the notch and is fixed to the first clamping plate or the second clamping plate. After the side of the first clamping plate rotates at a certain angle along the rotating shaft, it abuts against the side of the second clamping plate to form a clamping part. The first clamping plate and the second clamping plate are provided with a reset device at a position away from the clamping part and the rotating shaft. The reset device ensures that the side of the first clamping plate continuously abuts against the side of the second clamping plate. The second clamping plate is provided with a connecting part for fixing to the whiteboard.

[0007] To more clearly explain the structure of the reset device, facilitate installation and maintenance, and utilize interchangeable components to achieve the function of the reset device, a preferred embodiment is provided whereby a first limiting groove and a second limiting groove are respectively provided on the opposite sides of the first clamping plate and the second clamping plate, and one end of a torsion spring is respectively engaged in the two limiting grooves.

[0008] To facilitate easier installation of the torsion spring into the first and second limiting grooves, as well as to facilitate replacement and maintenance, and to allow control and management of the number of torsion springs to achieve different levels of clamping force, in a preferred embodiment, both the first and second limiting grooves are formed along the length of the second or first clamping plate, and the torsion spring can slide into the two limiting grooves from the end of the limiting groove.

[0009] To maintain the supporting function of the second clamping plate while reducing its weight and preserving the connection strength between the second clamping plate and the whiteboard, a preferred embodiment is that the second clamping plate is a combination of a support plate and an intermediate plate, with a connecting portion extending from the support plate towards the clamping portion and having bolt holes.

[0010] To improve the connection strength between the support plate and the intermediate plate, making them more stable, a preferred embodiment is that the support plate has an L-shaped cross-section and the intermediate plate has a W-shaped cross-section, with the corner of the L-shaped support plate embedded in the recessed center of the W-shaped intermediate plate.

[0011] As a preferred embodiment, the W-shaped intermediate plate includes a first plane, a second plane, a third plane and a fourth plane arranged in sequence, wherein the side of the fourth plane away from the third plane is a rotating shaft or bushing, and the second plane is connected to the support plate by screws along its normal direction.

[0012] To maintain the lightweight structure of the W-shaped intermediate plate, without machining countersunk holes, the protruding parts of the screws are not directly exposed, and irregular burrs may scratch the user's fingers when rotating the first clamping plate. As a preferred embodiment, a second limiting groove is provided at the connection between the second and third planes along the extension line of the third plane. The second limiting groove forms a recess with the first plane, and the screw is disposed inside the recess.

[0013] As a further explanation and illustration, the groove can be snapped or overlapped, especially with an interference fit of a decorative strip adapted to the groove.

[0014] As a preferred embodiment, the decorative strip includes, but is not limited to, light strips, pads, ribbons, and sponges, foam plastics, etc., covering the first plane.

[0015] To prevent the screws between the support plate and the intermediate plate from falling off due to vibration, a preferred embodiment further includes a protrusion along the normal direction of the support plate at the joint between the second plane and the support plate. The protrusion makes the second plane and the support plate form a certain angle. When the screw passes through the second plane and the support plate in sequence, the angle locks the screw because the screw threads are parallel along the axial direction.

[0016] As an explanation, the angle between 10° and 30° is between 10° and 30°.

[0017] To further explain the materials of each component, the preferred embodiment is that the first clamping plate and the intermediate plate are made of materials such as stainless steel and aluminum alloy, and their thickness can be less than 2mm, especially 1±0.2mm, to facilitate sheet metal processing; the thickness of the support plate is preferably more than 1.5mm and made of materials such as iron, stainless steel, and copper.

[0018] To enable users to more easily grip the clamping assembly on the side away from the clamping part, thus providing an anti-slip function, a preferred embodiment includes a first arc-shaped segment in the cross-section of the first clamping plate. A first end a of the first arc-shaped segment extends to the side of the rotating shaft and bushing, and a second end a extends to the side of the reset device. The center of the first arc-shaped segment is located on the side of the first clamping plate away from the rotating shaft. During clamping, the user can use their fingers to conform to the curved surface formed by the first arc-shaped segment, avoiding the same movement tendency of the fingers as a flat or curved surface, thereby achieving the anti-slip function.

[0019] To maintain the clamping function of the clamping plate, the clamping part can abut against the whiteboard along the normal direction of the whiteboard to achieve a direct clamping pressure. As a preferred embodiment, the cross-section of the first clamping plate includes a second arc-shaped segment. The first end b of the second arc-shaped segment is connected to the first end a of the first arc-shaped segment. The second end b of the second arc-shaped segment forms the side of the clamping part of the first clamping plate. The center of the second arc-shaped segment is located on the side of the first clamping plate near the rotating shaft.

[0020] To improve the bending resistance of the edge of the first arc segment, as a preferred embodiment, a flange is also provided on the side of the first arc segment of the first clamping plate away from the second arc segment. The flange does not completely enclose the torsion spring, allowing the torsion spring to be compressed in the direction normal to the second plane and then engaged in the first and second limiting grooves. This avoids excessive friction between the end of the torsion spring and the two limiting grooves when the number of torsion springs is increased or decreased due to the inherent deformation of the torsion spring itself.

[0021] To prevent components from falling off, and considering that the first clamping plate is usually located on the front of the whiteboard, as well as aesthetic requirements, in a preferred embodiment, the length of the second clamping plate is less than the length of the first clamping plate, and an end cap is fastened to the end face of the first clamping plate.

[0022] As a preferred embodiment, the side of the second clamping plate that is attached to the whiteboard is provided with an attachment post, and the side is located on the radial extension line of the attachment post.

[0023] The aforementioned fitting column can also be elastically engaged with one side of the L-shaped support plate through the first clamping plate, avoiding loosening between the first and second clamping plates due to assembly errors of the rotating shaft, which would affect transportation.

[0024] To ensure that the wall thickness of the end cap does not affect the tight fit between the bonding post and the whiteboard, a preferred embodiment includes an opening on the side of the end cap to accommodate the bonding post. During the clamping process as the bonding post and the whiteboard surface rotate with the shaft, the opening keeps the bonding post exposed to maintain contact with the whiteboard.

[0025] In order to enable the end cap to achieve a tighter connection with the first clamping plate in addition to elastic fastening, the preferred embodiment further includes that the end cap is provided with a snap-fit ​​post on the inner side, the snap-fit ​​post being adapted to the inner or outer diameter of the bushing, and the snap-fit ​​post and the bushing being interference fit.

[0026] Based on the same technical concept as the snap-fit ​​post, a snap-fit ​​piece adapted to the first limiting groove can also be provided. The snap-fit ​​piece is inserted into the first limiting groove and is interference-fitted with it.

[0027] The advantages and beneficial effects of this utility model are as follows: Through the mating structure of the notched bushing and the rotating shaft, the first clamping plate and the second clamping plate can be directly connected, avoiding the complex process of hammering or flattening the metal pin, and solving the problem of rotating shaft jamming caused by plastic melting. This reduces assembly steps and improves processing efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a disassembly diagram of the present invention;

[0030] Figure 3 This is a schematic diagram of the conventional cross-sectional structure of this utility model;

[0031] Figure 4 This is a schematic diagram of the cross-sectional structure of the clamping plate of this utility model in the open state;

[0032] Figure 5 This is a schematic diagram of the end cap structure of this utility model;

[0033] Figure 6 This is a schematic diagram of the intermediate plate structure of this utility model;

[0034] Reference numerals: 1-First clamping plate, 2-Second clamping plate, 3-Notch, 4-Sleeve, 5-Rotating shaft, 6-Clamping part, 7-First limiting groove, 8-Second limiting groove, 9-Torsion spring, 10-Connecting part, 11-Bolt hole, 12-First plane, 13-Second plane, 14-Third plane, 15-Fourth plane, 16-Screw, 17-Groove, 18-First arc segment, 19-First end a, 20-Second end a, 21-Second arc segment, 22-First end b, 23-Second end b, 24-Flange, 25-End cap, 26-Supporting plate, 27-Intermediate plate, 28-Fitting post, 29-Opening, 30-Snap-fit ​​post, 31-Snap-fit ​​piece, 32-Decorative strip, 33-Protrusion, 34-Angle, 99-White board, 100-Clamping object. Detailed Implementation

[0035] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0036] Please see Figures 1-6 This utility model embodiment demonstrates a whiteboard clamping assembly, including a first clamping plate 1 and a second clamping plate 2. The two are rotatably connected along their length by a bushing 4 with a notch 3 and a rotating shaft 5 inside the bushing 4. The notch 3 of the bushing 4 extends axially through the length of the bushing 4. The rotating shaft 5 extends radially from the notch 3 and connects to the second clamping plate 2. One side of the first clamping plate 1 rotates a certain angle along the rotating shaft 5 and then separably abuts against the opposite side of the second clamping plate 2. This abutting structure forms a clamping part 6. The first clamping plate 1 and the second clamping plate 2 are provided with a reset device at a position away from the clamping part 6 and the rotating shaft. The reset device makes the side of the first clamping plate 1 continuously abut against the side of the second clamping plate 2, forming a clamping effect on the clamped object 100. The second clamping plate 2 is provided with a connecting part 10 for fixing to the whiteboard.

[0037] To facilitate installation and maintenance, and to utilize interchangeable components to achieve the function of the reset device, allowing for disassembly, replacement, maintenance, and even increases, decreases, and adjustments in the number and position of the torsion springs 9, thus enabling control and management of the quantity to achieve different levels of clamping force, a first limiting groove 7 and a second limiting groove 8 are respectively provided on the opposite side of the first clamping plate 1 and the second clamping plate 2. One end of the torsion spring 9 is respectively engaged in each of the two limiting grooves, and both the first limiting groove 7 and the second limiting groove 8 are through grooves, with their lengths being approximately equal to the length of the first clamping plate 1. Both the first limiting groove 7 and the second limiting groove 8 are opened along the length direction of the second clamping plate, allowing the torsion spring 9 to slide from the end of the limiting groove into the interior of the two limiting grooves. Alternatively, the reset device can be a conventional spring whose ends respectively abut against the first clamping plate 1 and the second clamping plate 2.

[0038] To maintain the supporting function of the second clamping plate 2 while reducing its weight and maintaining the connection strength between the second clamping plate 2 and the whiteboard, the second clamping plate 2 is a combination of a support plate 26 and an intermediate plate 27. The connecting part 10 extends from the support plate 26 towards the clamping part 6 and has bolt holes 11. Although not shown in the figure, the connecting part 10 can be connected in the same way as in the background art, or by snap-fitting, gluing, or other clamping methods, all of which are acceptable without departing from the technical concept of this utility model. Furthermore, although only one connecting part is shown in the figure, two to three connecting parts 10 are preferable in this utility model.

[0039] To improve the connection strength between the support plate 26 and the intermediate plate 27, making them more stable, the support plate 26 has an L-shaped cross-section, and the intermediate plate 27 has a W-shaped cross-section. The corner of the L-shaped support plate 26 is embedded in the recessed middle part of the W-shaped intermediate plate 27. As a preferred embodiment, the W-shaped intermediate plate 27 includes a first plane 12, a second plane 13, a third plane 14, and a fourth plane 15 arranged sequentially. The side of the fourth plane 15 away from the third plane 14 is a rotating shaft or bushing 4, and the second plane 13 is connected to the support plate 26 by screws 16 along its normal direction.

[0040] To maintain the lightweight structure of the W-shaped intermediate plate 27, without machining countersunk holes, the protruding portion of the screw 16 is not directly exposed, and irregular burrs are prevented from potentially scratching the user's fingers when rotating the first clamping plate 1. A second limiting groove 8 is provided at the connection between the second plane 13 and the third plane 14 along the extension line of the third plane 14. The second limiting groove 8 forms a recess 17 with the first plane 12, and the screw 16 is disposed inside the recess 17. The recess 17 can be snap-fitted or overlapped, especially with an interference fit and a decorative strip 32 adapted to the recess 17.

[0041] Decorative strip 32 includes, but is not limited to, light strips, pads, ribbons, and sponge, foam plastic, etc. covering the first plane 12. To prevent the screws 16 between the support plate 26 and the intermediate plate 27 from falling off due to vibration, a preferred embodiment further includes a protrusion 33 along the normal direction of the joint between the second plane 13 and the support plate 26. The protrusion 33 makes the second plane 13 and the support plate 26 form a certain angle 34. When the screw 16 passes through the second plane 13 and the support plate 26 in sequence, the angle 34 locks the screw 16 because the threads of the screw 16 are parallel along the axial direction.

[0042] To enable users to more easily grip the clamping assembly on the side away from the clamping part 6, thus providing an anti-slip function, the first clamping plate 1 has a cross-section including a first arc-shaped segment 18. The first end a19 of the first arc-shaped segment 18 extends to the side of the rotating shaft 5 and the bushing 4, and the second end a20 extends to the side of the reset device. The center of the first arc-shaped segment 18 is located on the side of the first clamping plate 1 away from the rotating shaft 5. During clamping, the user can use their fingers to conform to the curved surface formed by the first arc-shaped segment 18, avoiding the same movement tendency of the fingers as a flat or curved surface, thereby achieving the anti-slip function.

[0043] To maintain the clamping function of the clamping plate, the clamping part 6 can abut against the whiteboard along the normal direction of the whiteboard to achieve a direct clamping pressure. The cross-section of the first clamping plate 1 includes a second arc-shaped segment 21. The first end b22 of the second arc-shaped segment 21 is connected to the first end a19 of the first arc-shaped segment 18. The second end b23 of the second arc-shaped segment 21 forms the side of the clamping part 6 of the first clamping plate 1. The center of the second arc-shaped segment 21 is located on the side of the first clamping plate 1 near the rotating shaft 5.

[0044] To improve the bending resistance of the edge of the first arc segment 18, a flange 24 is also provided on the side of the first arc segment 18 of the first clamping plate 1 away from the second arc segment 21.

[0045] To prevent issues such as component shifting, detachment, or displacement when the clamping assembly is vertically positioned along the length of the whiteboard due to its insert-type structure, and considering that the first clamping plate 1 is typically located on the front of the whiteboard for aesthetic reasons, the length of the second clamping plate 2 is less than the length of the first clamping plate 1. Specifically, the length of the second clamping plate 2 can be approximately 1-3 cm shorter than the first clamping plate 1. An end cap 25 is fastened to the end face of the first clamping plate 1. An adhesion post 28 is provided on the side of the second clamping plate 2 that adheres to the whiteboard, and this side is located on the radial extension line of the adhesion post 28.

[0046] The bonding post 28 can also be elastically engaged with one side of the L-shaped support plate 26 via the first clamping plate 1, preventing loosening between the first clamping plate 1 and the second clamping plate 2 due to assembly errors of the rotating shaft 5, which would affect transportation. To ensure that the wall thickness of the end cap 25 does not affect the tight fit between the bonding post 28 and the white board, an opening 29 is provided on the side of the end cap 25 to accommodate the bonding post 28. During the process of the bonding post 28 and the white board surface being clamped as the rotating shaft 5 rotates, the opening 29 keeps the bonding post 28 exposed to fit the white board. Since the opening 29 creates an assembly gap in the end cap 25, this opening also makes the end cap 25 easier to install. Specifically, the user can position the bonding post 28 into the opening, and then slowly fasten the end cap 25 to the first clamping plate 1 from the opening 29 away from the clamping part 6.

[0047] To ensure a tighter fit between the end cap 25 and the first clamping plate 1, in addition to elastic fastening, a snap-fit ​​post 30 is provided on the inner side of the end cap 25. The snap-fit ​​post 30 is adapted to the inner or outer diameter of the bushing 4, and the snap-fit ​​post 30 and the bushing 4 are interference-fitted. Optionally, a snap-fit ​​piece 31 adapted to the first limiting groove 7 can also be provided inside the end cap 25. The snap-fit ​​piece 31 is inserted into the first limiting groove 7 and is interference-fitted with it.

[0048] As an explanation of certain parameters and structures, the included angle 34 is between 10° and 30°. The first clamping plate 1 and the intermediate plate 27 are made of materials such as stainless steel or aluminum alloy, and their thickness can be less than 2mm, especially 1±0.2mm, to facilitate sheet metal processing; the thickness of the support plate 26 is preferably more than 1.5mm and made of materials such as iron, stainless steel, or copper. The end cap 25 can be an injection molded part.

[0049] The working principle of this utility model is as follows: the user presses the end of the first clamping plate 1 away from the clamping part 6, i.e., the anti-dislodgement area with the first arc segment 18, causing it to rotate around the rotating shaft 5. At this time, the side of the first clamping plate 1 separates from the side of the second clamping plate 2, forming an opening, which facilitates the insertion of paper, notepad, or other clamping objects 100. After the first clamping plate 1 is released, a reset device, such as a torsion spring 9, provides a reverse torque, causing the side of the first clamping plate 1 to re-abut against the side of the second clamping plate 2, clamping the clamping object 100 through continuous abutment force. The clamping force can be adjusted by the spring configuration; by increasing or decreasing the number of torsion springs 9, the clamping force of the clamping part 6 can be changed to adapt to clamping objects of different thicknesses.

[0050] The installation steps of the clamping assembly on the whiteboard shown in this utility model include fixing the connecting part 10 of the second clamping plate 2 to the edge of the whiteboard 99 with screws through the bolt holes 11. Especially since the whiteboard is made of glass, a suitable glass drill bit must be used to drill holes and install expansion bolts. The fitting post 28 on the side of the second clamping plate 2 must be in close contact with the surface of the whiteboard to ensure that the clamping part 6 is aligned with the normal direction of the whiteboard and to prevent the clamped object from tilting. The assembly of the first clamping plate and the second clamping plate adopts a direct insertion connection, whereby the rotating shaft 5 is directly inserted along the notch 3 of the bushing 4 to complete the rotational connection between the first clamping plate 1 and the second clamping plate 2. This design eliminates the need for hammering or flattening the end of the rotating shaft, simplifying the assembly process. An end cap 25 is fastened to the end of the first clamping plate 1, and its inner snap-fit ​​post 30 is interference-fitted with the bushing 4 to prevent the end cap from falling off and improve aesthetics. During user operation, the fingers rest on the inverse curved surface of the first arc segment 18, utilizing the friction between the curved surface and the fingers to prevent slippage, which is especially suitable for wet hands or rapid operation scenarios. The first clamping plate 1 and the intermediate plate 27 are made of thin stainless steel or aluminum alloy, balancing lightweight and bending resistance; the support plate 26 uses 1.5mm thick iron plate to ensure overall structural strength. The flange 24 of the first clamping plate 1 enhances the deformation resistance of the edge of the first arc segment 18, extending its service life. Decorative strips 32, such as LED light strips or soft padding, can be installed in the groove 17 to improve aesthetics or provide nighttime lighting, suitable for office or teaching scenarios.

[0051] The maintenance and debugging operations of this utility model include: when replacing the reset device, sliding the old torsion spring 9 out along the end of the first limiting groove 7 and the second limiting groove 8 of the first clamping plate 1 or the second clamping plate 2, replacing it with a new spring, and then sliding it back into the limiting groove. When the support plate 26 and the intermediate plate 27 are connected by screws 16, the 10°-30° included angle 34 formed by the protrusion 33 is used to lock the thread, reducing the risk of loosening caused by vibration.

[0052] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A whiteboard clamping assembly, comprising a first clamping plate (1) and a second clamping plate (2), characterized in that: The two are rotatably connected along the length direction by a bushing (4) with a notch (3) and a rotating shaft (5) inside the bushing; the rotating shaft (5) extends radially from the notch (3) and is fixed to the first clamping plate (1) or the second clamping plate (2); after the side of the first clamping plate (1) is rotated, it forms a clamping part (6) with the side of the second clamping plate (2); the cross section of the first clamping plate (1) includes a first arc segment (18) and a second arc segment (21), one end of the first arc segment (18) extends to the side of the rotating shaft (5) and the other end extends to the side of the reset device, one end of the second arc segment (21) is connected to the first arc segment (18) and the other end forms the side of the clamping part (6); the length of the second clamping plate (2) is less than the length of the first clamping plate (1), and the end face of the first clamping plate (1) is fastened with an end cap (25). The reset device is located at the position of the first clamping plate (1) and the second clamping plate (2) away from the clamping part (6) and the rotating shaft (5).

2. The clamping assembly according to claim 1, characterized in that: The reset device includes a first limiting groove (7) on the first clamping plate (1) and a second limiting groove (8) on the second clamping plate (2), wherein one end of a torsion spring (9) is respectively engaged in the first limiting groove (7) and the second limiting groove (8).

3. The clamping assembly according to claim 2, characterized in that: The second clamp (2) has a fitting post (28) on its side, and the end cap (25) has an opening (29) on its side to expose part of the fitting post (28).

4. The clamping assembly according to claim 3, characterized in that: The second clamping plate (2) includes a support plate (26) and a middle plate (27). The thickness of the support plate (26) is ≥1.5mm and the thickness of the middle plate (27) is ≤2mm. The first arc segment (18) has a flange (24) on the side away from the second arc segment (21).

5. The clamping assembly according to claim 4, characterized in that: The fitting post (28) and the side of the support plate (26) are elastically fastened together by the first clamping plate (1); the inner side of the end cap (25) is provided with a snap-fit ​​post (30) that is interference-fitted with the bushing (4) and / or a snap-fit ​​piece (31) that is inserted into the first limiting groove (7).

6. The clamping assembly according to claim 4, characterized in that: The support plate (26) has an L-shaped cross section, and the middle plate (27) has a W-shaped cross section. The corner of the support plate is embedded in the recessed part of the middle of the W-shaped middle plate.

7. The clamping assembly according to claim 6, characterized in that: The intermediate plate (27) includes a first plane (12), a second plane (13), a third plane (14) and a fourth plane (15) arranged in sequence. The fourth plane (15) has a rotating shaft (5) or a bushing (4) on its side. The second plane (13) is connected to the support plate (26) by a screw (16) arranged in the normal direction.

8. The clamping assembly according to claim 7, characterized in that: A second limiting groove (8) is provided at the connection between the second plane (13) and the third plane (14). The second limiting groove (8) and the first plane (12) form a groove (17). The screw (16) is set inside the groove (17) and a decorative strip (32) is provided inside the groove (17) with an interference fit.

9. The clamping assembly according to claim 7 or 8, characterized in that: The second plane (13) and the support plate (26) are connected at an angle (34) of 10°-30°, which is locked by screws (16); the support plate (26) and the middle plate (27) are connected at a protrusion (33) to form an angle structure.

10. The clamping assembly according to any one of claims 2-8, characterized in that: The first limiting groove (7) and the second limiting groove (8) are opened along the length direction of the first clamping plate (1) or the second clamping plate (2), allowing the torsion spring (9) to slide in from the end for installation.

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