Supporting and fixing structure for chair writing board
By combining an adapter, a chair clamp, and a connecting arm, the problem of complex and unstable support and fixing structures for writing boards in existing technologies is solved, enabling smooth rotation and angle adjustment of the writing board, thus improving its reliability and applicability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-27
AI Technical Summary
The existing support and fixing structure of the writing board on the chair is complicated, making it difficult to ensure the stability of the rotating support, which is prone to falling off and inconvenient to adjust the angle.
It adopts a combination structure of adapter, chair fixing clip and connecting arm. Rotation adjustment is achieved by arc-shaped rotating guide groove and rotation limiting protrusion, and angle adjustment is achieved by fan-shaped angle adjustment groove and angle adjustment limiting protrusion. It is locked and positioned by screw.
It achieves smooth rotation and angle adjustment of the writing tablet, improving the stability and reliability of use, preventing loosening or falling off, and has strong applicability.
Smart Images
Figure CN224038800U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to chair writing board technical field, concretely relates to a support fixed structure for chair writing board. BACKGROUND
[0002] In some office areas or some meeting places, there will be corresponding seats, and in order to facilitate the participants to record, generally, a writing board is rotatably connected at a handrail of the seat, when writing is needed, the writing board is rotated to be used, when writing is not needed, the writing board is only needed to be rotated downward to be vertical, it will not occupy the space of the seat, but the support fixed structure of the writing board in the prior art is not only complex in structure, but also difficult to guarantee the stability of rotation support, and is prone to falling off during use, and the angle is not easy to adjust arbitrarily according to needs, so that the applicability is limited. SUMMARY
[0003] The utility model aims at providing a support fixed structure for chair writing board which is reasonable in structure and is beneficial to improving the stability of use.
[0004] The technical scheme for realizing the utility model is a support fixed structure for chair writing board, which comprises an adapter connected to the writing board, a chair fixing clamp connected to the armrest of the chair, and a connecting arm arranged between the chair fixing clamp and the adapter, the center of the adapter is rotatably connected to the writing board through a stud, and a rotation limiting protrusion matched with the arc-shaped rotation guide groove on the bottom surface of the writing board is arranged on the top surface edge of the adapter.
[0005] A fan-shaped angle adjusting groove is formed in the inner wall of the mounting cavity hole arranged on the side of the adapter.
[0006] One end of the connecting arm is fixed to the outer wall of the fixing clamp, and the other end is fixed with a screw hole plug post in the center, and an angle adjusting limiting protrusion is integrally formed on the outer wall of the screw hole plug post.
[0007] The screw hole plug post is connected in the mounting cavity hole through a screw rod, the connecting arm is rotatably adjusted in the center of the screw hole plug post, and the angle adjusting limiting protrusion is translated in the fan-shaped angle adjusting groove and locked and positioned through the screw rod.
[0008] Further preferably, the chair fixing clamp comprises a fixed clamp piece and a movable clamp piece.
[0009] One end of the connecting arm is fixed to the outer wall of the fixed clamp piece.
[0010] A plurality of mounting lugs are arranged on the edges of the movable clamp piece and the fixed clamp piece, and the movable clamp piece and the fixed clamp piece are clamped on the armrest of the chair and positioned through the bolts at the mounting lugs.
[0011] Further preferably, the fan-shaped angle adjustment grooves are two and symmetrically arranged on both sides of the diameter of the mounting cavity hole.
[0012] The angle adjustment limiting protrusions are two and arranged in different fan-shaped angle adjustment grooves respectively.
[0013] Further preferably, a reinforcing rubber pad is arranged between the top surface of the adapter and the bottom surface of the writing board, and an arc-shaped matching groove is arranged on the reinforcing rubber pad and matched with the arc-shaped rotation guide groove of the bottom surface of the writing board.
[0014] The rotation limiting protrusion penetrates through the arc-shaped matching groove and extends into the arc-shaped rotation guide groove.
[0015] Further preferably, an anti-skid fixed rubber layer is attached to the inner wall of the fixed clamping piece and the movable clamping piece.
[0016] Further preferably, a decorative cover is arranged on the adapter, and the decorative cover is clamped at the end of the mounting cavity hole.
[0017] Further preferably, an anti-skid rubber pad is arranged between the screw hole column and the inner wall of the mounting cavity hole.
[0018] The utility model has the positive effect: the utility model discloses the structure is rationally arranged, and its not only integral structure is simple, and through the rotation limiting protrusion of arc-shaped rotation guide groove cooperation, can realize rotation adjustment and limiting, and cooperation fan-shaped angle adjustment groove and angle adjustment limiting protrusion, can realize angle adjustment operation, and after assembling, it is not easy to loosen or fall off, and can adjust different angles according to need, improves the use stability and reliability, and the applicability is strong. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to make the content of the utility model more easily be clearly understood, the utility model is further explained in detail below according to specific embodiments and in conjunction with the drawings, wherein:
[0020] Fig. 1 It is the structural schematic diagram of the utility model;
[0021] Fig. 2 It is the split structural schematic diagram of the utility model;
[0022] Fig. 3 It is the specific structural schematic diagram of the adapter in the utility model;
[0023] Fig. 4 It is the structural schematic diagram when the utility model is connected with the writing board.
[0024] Fig. 1 is a writing board, adapter 2, chair fixed clamp 3, fixed clamp piece 31, movable clamp piece 32, mounting lug 33, connecting arm 4, rotation limiting protrusion 5, mounting cavity hole 6, fan-shaped angle adjustment slot 7, threaded hole insert post 8, angle adjustment limiting protrusion 9, reinforcing rubber pad 10, arc-shaped matching groove 11, decorative cover 12, anti-skid rubber pad 13. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. EMBODIMENT
[0026] As shown in Figs. 1 to 4 Fig. 1 is a support and fixing structure for a chair writing board, which comprises an adapter 2 connected to the writing board 1, a chair fixed clamp 3 connected to the armrest of the chair, and a connecting arm 4 arranged between the chair fixed clamp and the adapter. The center of the adapter is rotatably connected to the writing board through a threaded stud, and a rotation limiting protrusion 5 is arranged on the top surface of the adapter. In this embodiment, the arc-shaped rotation guide groove on the bottom surface of the writing board is a conventional structure of the prior art, which is simply applied and therefore not described in detail. The width of the rotation limiting protrusion is much smaller than that of the arc-shaped rotation guide groove, so that the writing board can be adjusted between horizontal and vertical positions by rotating in the arc-shaped rotation guide groove. This is a technical common sense structure, and therefore not described in detail.
[0027] In this embodiment, a mounting cavity hole 6 is arranged on the side of the adapter, and a fan-shaped angle adjustment slot 7 is formed in the inner wall of the mounting cavity hole. During assembly, one end of the connecting arm is fixed to the chair fixed clamp, and a threaded hole insert post 8 is fixed at the center of the other end. An angle adjustment limiting protrusion 9 is integrally formed on the outer wall of the threaded hole insert post. The threaded hole insert post is connected in the mounting cavity hole through a screw rod, and the connecting arm is rotated and adjusted around the threaded hole insert post. The angle adjustment limiting protrusion is translated in the fan-shaped angle adjustment slot and locked and positioned by the screw rod. The screw rod can be used for locking and positioning after adjusting the angle, which is beneficial to improving the use stability and reliability of the overall structure. In actual application, two fan-shaped angle adjustment slots are symmetrically arranged on both sides of the diameter of the mounting cavity hole, and two angle adjustment limiting protrusions are arranged in different fan-shaped angle adjustment slots.
[0028] In the embodiment, the chair fixing clamp comprises a fixed clamp piece 31 and a movable clamp piece 32; one end of the connecting arm is fixed to the outer wall of the fixed clamp piece; the movable clamp piece is provided with a plurality of mounting lugs 33 on the edge of the fixed clamp piece; the movable clamp piece and the fixed clamp piece are clamped on the armrest of the chair and positioned by the bolts at the mounting lugs. In actual application, in order to improve the anti-skid performance, an anti-skid fixed adhesive layer is attached to the inner walls of the fixed clamp piece and the movable clamp piece. The connecting arm and the fixed clamp piece can be fixed by screws or integrally formed.
[0029] In the embodiment, a reinforcing adhesive pad 10 is arranged between the top surface of the adapter and the bottom surface of the writing board, the reinforcing adhesive pad is provided with an arc-shaped matching groove 11 matched with the arc-shaped rotation guide groove of the bottom surface of the writing board; the rotation limiting protrusion penetrates through the arc-shaped matching groove and extends into the arc-shaped rotation guide groove. In the embodiment, the reinforcing adhesive pad can ensure the effectiveness of rotation, reduce the friction during rotation and has strong applicability.
[0030] In order to improve the overall appearance, a decorative cover 12 is arranged on the adapter, the decorative cover is clamped at the end of the mounting cavity hole. An anti-skid adhesive pad 13 is arranged between the screw hole inserting column and the inner wall of the mounting cavity hole.
[0031] The utility model has the positive effect: the utility model discloses the structure setting is reasonable, and it is not only integral structure simple, and through the rotation limiting protrusion that arc-shaped rotation guide groove cooperates, can realize rotation adjustment and limit, and cooperate sector angle adjustment groove and angle adjustment limiting protrusion, can realize angle adjustment operation, and after assembling, it is not easy to loosen or fall off, and can adjust different angles according to needs, improve the use stability and reliability, and have strong applicability.
[0032] The standard parts used in the embodiment can be directly purchased from the market, and the non-standard structural parts according to the description can also be directly processed according to the existing technical knowledge without doubt, and the connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment adopt the conventional type in the existing technology, so specific description is not made here.
[0033] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the implementation mode of the utility model. For ordinary skilled persons in the art, other different forms of changes or changes can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the implementation modes. The changes or changes extended from the essential spirit of the utility model are still within the protection scope of the utility model.
Claims
1. A support fixing structure for a desk of a chair, comprising an adapter connected to a desk, a chair fixing clamp connected to an armrest of the chair, and a connecting arm provided between the chair fixing clamp and the adapter, characterized in that: The center of the adapter can be rotatably connected to the writing board via a stud, and the top edge of the adapter is provided with a rotation limiting protrusion that cooperates with the arc-shaped rotation guide groove on the bottom surface of the writing board. The adapter has a mounting cavity on its side, and a fan-shaped angle adjustment groove is provided on the inner wall of the mounting cavity. One end of the connecting arm is fixed to the chair fixing clamp, and the other end is fixed with a screw hole post at the center. An angle adjustment limiting protrusion is integrally formed on the outer wall of the screw hole post. The screw-hole post is connected to the mounting cavity via a screw. The connecting arm rotates to adjust the angle around the center of the screw-hole post. The angle adjustment limiting protrusion moves within the fan-shaped angle adjustment groove and is locked in place by the screw.
2. A support structure for a writing tablet for a chair according to claim 1, characterized in that: The chair fixing clip includes a fixed clip and a movable clip; One end of the connecting arm is fixed to the outer wall of the fixing clip; The movable clip and the fixed clip are provided with several mounting lugs on their edges. The movable clip and the fixed clip are clamped onto the chair armrest and positioned by bolts at the mounting lugs.
3. The support structure for a chair tablet according to claim 1, wherein: There are two fan-shaped angle adjustment slots, which are symmetrically arranged on both sides of the diameter of the mounting cavity hole; The angle adjustment limiting protrusions are two in number and are respectively set in different fan-shaped angle adjustment slots.
4. The support structure for a chair tablet according to claim 1, wherein: A reinforcing rubber pad is provided between the top surface of the adapter and the bottom surface of the writing board, and the reinforcing rubber pad is provided with an arc-shaped mating groove that mates with the arc-shaped rotating guide groove on the bottom surface of the writing board. The rotation limiting protrusion passes through the arc-shaped mating groove and extends into the arc-shaped rotation guide groove.
5. The support structure for a chair tablet according to claim 2, wherein: The inner walls of the fixed clip and the movable clip are covered with an anti-slip adhesive layer.
6. The support structure for a chair tablet according to claim 1, wherein: The adapter is provided with a decorative cover, which is snapped into the end of the mounting cavity.
7. The support structure for a chair tablet according to claim 1, wherein: An anti-slip pad is provided between the screw hole post and the inner wall of the mounting cavity.