TWI708579B - Dual-purpose chair - Google Patents

Abstract

A dual-purpose chair, comprising a cushion, a pair of armrests and a movable backrest. Each armrest is slightly L-shaped and has a first end and a second end. The first ends are respectively and coaxially pivoted to the The front bottom of the seat cushion allows the pair of armrests to be turned over 90 degrees in the horizontal and vertical states. The second ends of the pair of armrests are fastened to both sides of the movable backrest. The back of the movable backrest It is a rigid board. When the pair of armrests are in a horizontal state, the movable seat back stands upright behind the seat cushion as a chair back. When the pair of armrests is turned into a vertical state, the movable seat back is parallel to Above the seat cushion, the hard board is upward to form a desktop.

Description

Dual-purpose chair

The present invention relates to chairs, in particular to a chair with variable uses.

In terms of furniture, tables and chairs are the most frequently used. Whether in homes, public places, schools, companies, etc., tables and chairs are needed. Sometimes there are situations with different needs, such as speeches. What is needed is a chair with a backrest. For example, when taking classes, exams, and writing homework, you need a table and a chair. However, although chairs with a backrest are conventional, they are all fixed and single-purpose chairs. It cannot be converted into different types for use. In some special occasions, it is not necessary to set up a table regularly, but there may still be a temporary need for a table to provide the function of placing objects or writing. Therefore, if the existing chair can be provided with a simple change A temporary desktop will be very convenient for specific users.

In view of this, the inventor has been engaged in the manufacturing, development and design of related products for many years. Aiming at the above-mentioned goals, after detailed design and careful evaluation, he finally obtained a practical invention.

The main purpose of the present invention is to provide a dual-purpose chair, which is normally a chair with a backrest, but the back of the chair can be turned over to form a temporary table top, providing two usage changes.

To achieve the above objective, the present invention provides a dual-purpose chair, which includes a cushion, a pair of armrests and a movable backrest. Each armrest is slightly L-shaped and has a first end and a second end. The ends are respectively and coaxially pivotally connected to the front bottom of the seat cushion, so that the pair of armrests can be turned over 90 degrees in a horizontal and vertical state, and the second ends of the pair of armrests are fastened to both sides of the movable seat back Side, the back of the movable chair back is a rigid board. When the pair of armrests are in a horizontal state, the movable chair back stands upright behind the seat cushion as a chair back, and when the pair of armrests is turned into a vertical state At this time, the movable seat back is parallel to the upper part of the seat cushion, and the rigid board is upward to form a desktop.

1‧‧‧Cushion

21,22‧‧‧Handrail

211,221‧‧‧First end

212,222‧‧‧Second end

3‧‧‧Back

31‧‧‧Hard plate body 31

4‧‧‧Foot

5‧‧‧Pivot structure

51‧‧‧Axle

511‧‧‧stop

52‧‧‧Axle seat

521‧‧‧Limiting slot

53‧‧‧Screw

The first figure is a perspective view of the present invention.

The second figure is a side view of the present invention when it is formed into a backrest chair.

The third figure is a side view of the present invention when the back of the chair is turned into a desktop.

The fourth figure is a perspective exploded view of the armrest part of the present invention.

The fifth figure is a perspective exploded view of the pivot structure of the present invention.

The sixth figure is a schematic diagram of the rotation limit of the pivot structure of the present invention.

In order to make your reviewer understand the purpose, features and functions of the present invention The effect can be further understood and understood, and the implementation methods and diagrams are detailed below.

Please refer to the first and second figures. The dual-purpose chair of the present invention mainly includes a cushion 1, a pair of armrests 21, 22, and a movable backrest 3. Each armrest 21, 22 is slightly L-shaped and has a first end 211, 221 and a second end 212, 222. The first end 211, 221 is respectively and coaxially pivoted to the front bottom of the seat cushion 1, so that the pair of armrests 21, 22 can be turned into a 90 degree range in horizontal and vertical states. The second ends 212, 222 of the pair of armrests 21, 22 are fastened to both sides of the movable backrest 3, and the back of the movable backrest 3 is a rigid board 31. When the pair of armrests 21, 22 are in a horizontal state When the movable chair back 3 stands upright behind the seat cushion 1 as a chair back, as shown in the first and second figures; and when the pair of armrests 21, 22 flip forward to a vertical state, the movable chair The back 3 is parallel to the upper side of the seat cushion 1, so that the rigid board 31 upwardly forms a table top, as shown in the third figure.

The first ends 211, 221 of each armrest 21, 22 are provided with a pivoting structure 5. Please refer to the fourth and fifth drawings. The pivoting structure 5 includes an axle seat 52 fixed to the bottom of the seat cushion 1, and a The first ends 211, 221 of the armrests 21 and 22 are axially sleeved on the shaft 51 in the shaft base 52 and a screw 53 axially inserted into the shaft base 52 and the shaft 51, and the screw 53 clamps the shaft base 52 and the shaft 51, so that the shaft 51 can rotate in the shaft seat 52 but cannot escape.

Please refer to the fifth and sixth figures. The tube wall of the shaft seat 52 is provided with a 90-degree limit slot 521, which is the size of a quarter of the tube wall. The shaft A stopper 511 corresponding to the limit groove 521 is protruded on the tube wall of 51. The stopper 511 is located in the limit groove 521 and is blocked by two corresponding sides of the limit groove 521, so that the shaft 51 It can only be rotated within the 90-degree angle range defined by the limit slot 521, that is, the armrests 21, 22 can only be turned within the 90-degree range of the horizontal state and the vertical state.

As for the connection between the armrests 21 and 22 and the movable backrest 3, they are fixed and non-rotatable. The fixing methods are conventional and vary. The diagram shown is the bolt and pin locking as an example. Others such as The method of welding or riveting is also feasible, so it will not be repeated.

The dual-purpose chair of the present invention can be provided with a foot 4 on the seat cushion 1, and the foot 4 can be a fixed type or a pulley type, which can be selected according to actual needs.

The foregoing is a specific description of the preferred embodiments of the present invention and the technical features of the present invention; however, those skilled in the art should make changes and modifications to the present invention without departing from the spirit and principle of the present invention. Such changes and modifications shall be covered in the scope defined by the scope of the following patent applications.

1‧‧‧Cushion

21,22‧‧‧Handrail

211,221‧‧‧First end

212,222‧‧‧Second end

3‧‧‧Back

4‧‧‧Foot

5‧‧‧Pivot structure

Claims (1)

A dual-purpose chair, comprising: a cushion; a pair of armrests, each armrest is slightly L-shaped, having a first end and a second end, the first ends are respectively and coaxially pivoted to the front bottom of the seat cushion , The first end of each armrest is provided with a pivot structure, the pivot structure includes a shaft base fixed to the bottom of the seat cushion and a first end fixed to the armrest and axially sleeved in the shaft base The shaft, and the shaft seat and the shaft rod are penetrated with a screw, the screw system clamps the shaft seat and the shaft rod, so that the shaft rod can rotate in the shaft seat but cannot be removed, and the tube of the shaft seat A limit slot with a 90-degree angle is provided on the wall, and a stopper corresponding to the limit slot is protrudingly provided on the tube wall of the shaft. The stopper is located in the limit slot and is two of the limit slots. The corresponding side is blocked, so that the shaft can only be rotated within the 90-degree angle range limited by the limit slot, so that the pair of armrests can be turned in a horizontal state and a vertical state of 90 degrees; and a movable backrest, The second end of the pair of armrests is fastened to both sides of the movable chair back. The back of the movable chair back is a rigid board. When the pair of armrests are level, the movable chair back stands upright on the back The back of the seat cushion is used as a chair back, and when the pair of armrests are turned into a vertical state, the movable chair back is parallel to the upper part of the seat cushion, and the rigid board is upward to form a table top.

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