CN212325927U

CN212325927U - Backrest writing board and seat

Info

Publication number: CN212325927U
Application number: CN202020064395.2U
Authority: CN
Inventors: 尹宗辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2021-01-12
Anticipated expiration: 2030-01-13

Abstract

The utility model discloses a backrest writing board, including fixed plate and fly leaf, fixed plate and fly leaf pass through rotary mechanism and connect, rotary mechanism is used for making the fly leaf rotate for the fixed plate, and keeps expanding or packing up the state, the beneficial effects of the utility model are that: through the design of the rotating mechanism, the movable plate can be subjected to angle adjustment relative to the fixed plate, and the movable plate can be kept in an unfolded or folded state, so that the use is very convenient.

Description

Backrest writing board and seat

Technical Field

The utility model relates to a seat, specifically a back board and seat.

Background

The chair is a seat with a backrest and armrests. The application in daily life is very wide.

In actual life, particularly in places such as meeting rooms, study rooms, classrooms and the like, notes need to be recorded at any time, and thus, chairs with writing boards are born.

And among the prior art, the structure of board is comparatively simple, long back in the use, the state that can not appear pulling up or can not put down easily, and the finger that can not pull up can't keep the user state, can't atress promptly, can not work on the board, can't keep the convergence state to put down the finger, consequently the utility model provides a back board and seat.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a back board and seat to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a backrest writing board comprises a fixed plate and a movable plate, wherein the fixed plate and the movable plate are connected through a rotating mechanism, and the rotating mechanism is used for enabling the movable plate to rotate relative to the fixed plate and keep the movable plate in an unfolded or folded state.

As a further aspect of the present invention: the rotating mechanism includes:

the rotary moving part is connected between the fixed plate and the movable plate and is used for enabling the movable plate to rotate relative to the fixed plate;

one end of the rotating arm is movably arranged on the mounting frame, and the other end of the rotating arm is provided with a moving part which is matched with an arc-shaped moving groove arranged on the mounting frame and used for limiting the rotation of the rotating arm; and

and one end of the elastic piece is connected with the movable piece, and the other end of the elastic piece is connected with a mounting point arranged on the rotary movable piece, wherein the distance between the mounting point and the two ends of the movable groove is less than the distance between the mounting point and other positions of the movable groove, so that the movable plate is kept in an unfolded or folded state under the action of elastic force.

As a further aspect of the present invention: and a bearing is arranged between the moving part and the moving groove and is used for enabling the moving part to smoothly slide in the moving groove.

As a further aspect of the present invention: the rotary moving part is also provided with a driving arm which follows the rotary moving part, and the driving arm is provided with a waist-shaped hole for the moving part to jump at the radial position.

As a further aspect of the present invention: the driving arm and the elastic piece are coaxially arranged.

As a further aspect of the present invention: the movable plate is also provided with a handle hole.

Another object of the present invention is to provide a chair, which comprises a chair body and a backrest writing board installed on the chair body.

Compared with the prior art, the beneficial effects of the utility model are that: through the design of the rotating mechanism, the movable plate can be subjected to angle adjustment relative to the fixed plate, and the movable plate can be kept in an unfolded or folded state, so that the use is very convenient.

Drawings

Fig. 1 is a schematic structural view of a back-rest tablet (when unfolded).

Fig. 2 is a schematic structural view of a back-rest tablet (in a folded state).

FIG. 3 is a schematic view of a driving arm of a tablet with a backrest.

In the figure: the device comprises a fixed plate 1, a movable plate 2, a rotary movable part 3, a mounting frame 4, a movable groove 5, a movable part 6, a tension spring 7, a rotating arm 8 and a driving arm 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, in an embodiment of the present invention, a backrest writing board includes a fixed plate 1 and a movable plate 2, the fixed plate 1 and the movable plate 2 are connected by a rotating mechanism, and the rotating mechanism is used to enable the movable plate 2 to rotate relative to the fixed plate 1 and keep in an expanded or retracted state.

In the extended or retracted state indication described in this embodiment, the movable plate 2 is close to a vertical state with respect to the fixed plate 1, as shown in fig. 1, at this time, the movable plate 2 is in an extended state, the movable plate 2 can be used as a tablet, and the movable plate 2 and the fixed plate 1 are kept close to a same plane, as shown in fig. 2, that is, in a retracted state.

Referring to fig. 1, as a preferred embodiment of the present invention, the rotating mechanism includes a rotating moving part 3, a rotating arm 8 and an elastic member, the rotating moving part 3 is connected between the fixed plate 1 and the movable plate 2, and is used for enabling the movable plate 2 to rotate relative to the fixed plate 1; one end of the rotating arm 8 is movably mounted on the mounting frame 4, the other end of the rotating arm is provided with a moving part 6, the moving part 6 is matched with an arc-shaped moving groove 5 formed in the mounting frame 4, and the moving groove 5 is used for limiting the rotation of the rotating arm 8; one end of the elastic piece is connected with the movable piece 6, and the other end of the elastic piece is connected with a mounting point arranged on the rotary movable piece 3, wherein the distance between the mounting point and the two ends of the movable groove 5 is less than the distance between the mounting point and the other positions of the movable groove 5, so that the movable plate 2 is kept in an unfolding or folding state under the action of elastic force.

When the movable plate 2 is close to the vertical state relative to the fixed plate 1, at this moment, the movable part 6 is in the end position of the movable groove 5, the movement cannot be continued, meanwhile, the distance between the mounting point and the two ends of the movable groove 5 is smaller than the distance between the mounting point and the other positions of the movable groove 5, at this moment, the movable plate 2 does not have the trend of moving to other positions, the balance of the positions can be kept, after the movable plate 2 is rotated to keep the retracted state, the same is true, the movable part 6 is in the other end position of the movable groove 5, the movement cannot be continued, meanwhile, because the distance between the mounting point and the two ends of the movable groove 5 is smaller than the distance between the mounting point and the other positions of the movable groove 5.

In one aspect of this embodiment, the elastic member is a tension spring, and the rotary moving member 3 is a pin.

Referring to fig. 1, as another preferred embodiment of the present invention, a bearing is disposed between the movable member 6 and the movable slot 5 for enabling the movable member 6 to smoothly slide in the movable slot 5.

The bearing is provided to facilitate rolling friction by sliding friction between the movable member 6 and the movable groove 5, thereby improving smoothness during movement.

Referring to fig. 2 to 3, as another preferred embodiment of the present invention, a driving arm 9 following the rotating moving member 3 is further disposed on the rotating moving member 3, and a waist-shaped hole for allowing the moving member 6 to jump in a radial position is disposed on the driving arm 9.

When the driving arm 9 rotates along with the rotating movable member 3, it will drive the movable member 6 to move in the movable slot 5, and at this time, because the movable member 6 will generate position jump in the radial direction, a waist-shaped hole is provided to give way to the jump.

Referring to fig. 2 to 3, as another preferred embodiment of the present invention, the driving arm 9 is disposed coaxially with the elastic member, and the mounting point may also be disposed on the driving arm 9, which is not limited in particular.

Referring to fig. 1 to 3, as another preferred embodiment of the present invention, a handle hole is further disposed on the movable plate 2, and the handle hole is convenient for manually driving the movable plate 2 to move.

The embodiment also provides a seat, which comprises a seat body and a backrest writing board arranged on the seat body. In this embodiment, the fixing plate in the backrest writing board can be used as the backrest in the seat body.

The above embodiment of the utility model provides a backrest writing board to provide a seat based on this backrest writing board, through rotary mechanism's design, make fly leaf 2 can carry out angle modulation for fixed plate 1, and fly leaf 2 can keep expanding or packing up the state, and it is very convenient during the use.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A backrest writing board comprises a fixed plate (1) and a movable plate (2), and is characterized in that the fixed plate (1) and the movable plate (2) are connected through a rotating mechanism, and the rotating mechanism is used for enabling the movable plate (2) to rotate relative to the fixed plate (1) and keep in an unfolded or folded state;

the rotating mechanism includes:

the rotary moving part (3) is connected between the fixed plate (1) and the movable plate (2) and is used for enabling the movable plate (2) to rotate relative to the fixed plate (1);

one end of the rotating arm (8) is movably arranged on the mounting frame (4), the other end of the rotating arm is provided with a moving part (6), the moving part (6) is matched with an arc-shaped moving groove (5) formed in the mounting frame (4), and the moving groove (5) is used for limiting the rotation of the rotating arm (8); and

and one end of the elastic piece is connected with the moving piece (6), the other end of the elastic piece is connected with a mounting point arranged on the rotating moving piece (3), wherein the distance between the mounting point and the two ends of the movable groove (5) is less than the distance between the mounting point and other positions of the movable groove (5), so that the movable plate (2) is kept in an unfolding or folding state under the action of elastic force.

2. A backrest writing board according to claim 1, wherein a bearing is provided between the movable member (6) and the movable slot (5) for allowing the movable member (6) to smoothly slide in the movable slot (5).

3. A backrest writing board according to claim 1 or 2, wherein the rotary moving member (3) is further provided with a driving arm (9) following the rotary moving member, and the driving arm (9) is provided with a waist-shaped hole for the position jump of the moving member (6) in the radial position.

4. A back tablet according to claim 3, wherein the actuating arm (9) is arranged coaxially with the resilient member.

5. A back-rest tablet according to claim 1, 2 or 4, wherein the movable plate (2) is further provided with a handle hole.

6. A seat, comprising a seat body, characterized by further comprising a backrest writing board installed on the seat body and according to any one of claims 1 to 5.