Armrest device for adjusting inclination angle of backrest

Abstract

An armrest device for adjusting an inclination angle of a backrest. The armrest device includes a side connecting bracket and an armrest. A lower end of the side connecting bracket is fixedly connected with a seat cushion. Right ends of the side connecting bracket and the armrest are rotatably connected with the backrest. An upper end of the side connecting bracket is fixedly connected with a positioning seat. An upper end of the positioning seat extends to an inner cavity of the armrest. The positioning seat shifts the inclination angle of the backrest and limits a position of the backrest through a positioning mechanism. A first spring limiting a movement of the armrest in an X direction and a second spring limiting a movement of the armrest in a Z direction are disposed between the positioning seat and the armrest.

Claims

1. An armrest device for adjusting an inclination angle of a backrest, comprising: a side connecting bracket, and an armrest; wherein a right end of the side connecting bracket and a right end of the armrest are rotatably connected with the backrest; an upper end of the side connecting bracket is fixedly connected with a positioning seat; an upper end of the positioning seat extends to an inner cavity of the armrest; the positioning seat shifts the inclination angle of the backrest and limits a position of the backrest through a positioning mechanism disposed in the inner cavity of the armrest; a first spring limiting a movement of the armrest in an X direction and a second spring limiting a movement of the armrest in a Z direction are disposed between the positioning seat and the armrest; one end of the first spring is connected with the positioning seat through a first connecting structure; another end of the first spring is connected with the armrest through a second connecting structure; one end of the second spring is connected with the positioning seat through a third connecting structure; another end of the second spring is connected with the armrest through a fourth connecting structure.

2. The armrest device for adjusting the inclination angle of the backrest according to claim 1, wherein the positioning mechanism comprises a positioning bayonet inserted into the positioning seat and positioning groove groups fixedly disposed on the inner cavity of the armrest; the positioning groove groups are symmetrical about a front-to-rear plane; the positioning groove groups are disposed on an inner wall of the inner cavity of the armrest; two ends of the positioning bayonet are respectively clamped in the positioning groove groups.

3. The armrest device for adjusting the inclination angle of the backrest groups a according to claim 2, wherein each of the positioning groove groups comprises a row of fixing blocks disposed from left to right at intervals; and an interval between two adjacent fixing blocks forms a positioning groove.

4. The armrest device for adjusting the inclination angle of the backrest according to claim 3, wherein a fixing block on a far left and a fixing block on a far right are limiting blocks.

5. The armrest device for adjusting the inclination angle of the backrest according to claim 1, wherein the first connecting structure is a first pulling hook; the second connecting structure is a second pulling hook; the one end of the first spring is connected to the first pulling hook; the another end of the first spring is connected to the second pulling hook; the first pulling hook is connected to the positioning seat along the X direction; the second pulling hook is connected to an inner wall of the armrest along the X direction.

6. The armrest device for adjusting the inclination angle of the backrest according to claim 1, wherein third connecting structure is a third pulling hook; the fourth connecting structure is a fourth pulling hook; the one end of the second spring is connected to the third pulling hook; the another end of the second spring is connected to the fourth pulling hook; the third pulling hook is connected to the positioning seat along the Z direction; the fourth pulling hook is connected to an inner wall of the armrest along the Z direction.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a perspective schematic diagram showing a structure of an armrest device of the present disclosure.

(2) FIG. 2 is a front cross-sectional schematic diagram showing the structure of the armrest device the present disclosure.

(3) FIG. 3 is an enlarged partial view showing the positioning seat connected with the second spring.

(4) FIG. 4 is a perspective schematic diagram of the armrest device where the armrest device is in a first configuration of use.

(5) FIG. 5 is a perspective schematic diagram of the armrest device where the armrest device is in a second configuration of use.

(6) In the drawings:

(7) 1side connecting bracket; 2armrest; 3positioning seat; 4positioning mechanism; 5first spring; 6second spring; 7positioning bayonet; 8positioning groove group; 9fixing block; 10positioning groove; 11first pulling hook; 12second pulling hook; 13third pulling hook; and 14fourth pulling hook.

DETAILED DESCRIPTION

(8) The present disclosure will be further explained below in conjunction with the drawings:

(9) As shown in FIGS. 1-5, the present disclosure provides an armrest device for adjusting an inclination angle of a backrest. The armrest device comprises a side connecting bracket 1 and an armrest 2. A lower end of the side connecting bracket 1 is fixedly connected with a seat cushion of a chair. A right end of the side connecting bracket 1 and a right end of the armrest 2 are rotatably connected with the backrest of the chair. An upper end of the side connecting bracket 1 is fixedly connected with a positioning seat 3. An upper end of the positioning seat 3 extends to an inner cavity of the armrest 2. The positioning seat 3 shifts the inclination angle of the backrest and limits a position of the backrest through a positioning mechanism 4 disposed in the inner cavity of the armrest 2. A first spring 5 limiting a movement of the armrest 2 in an X direction and a second spring 6 limiting a movement of the armrest 2 in a Z direction, are disposed between the positioning seat 3 and the armrest 2. One end of the first spring 5 is connected with the positioning seat 3 through a first pulling hook. Another end of the first spring 5 is connected with the armrest through a second pulling hook. One end of the second spring 6 is connected with the positioning seat 3 through a third pulling hook. Another end of the second spring 6 is connected with the armrest 2 through a fourth pulling hook.

(10) The positioning mechanism 4 comprises a positioning bayonet 7 inserted into the positioning seat 3 and positioning groove groups 8 fixedly disposed on the inner cavity of the armrest 2. The positioning groove groups 8 are front-and-rear symmetrical arranged. The positioning groove groups 8 are disposed on an inner wall of the inner cavity of the armrest 2. Two ends of the positioning bayonet 7 are respectively clamped in the positioning groove groups 8.

(11) Furthermore, each of the positioning groove groups 8 comprises a row of fixing blocks 9 disposed from left to right at intervals. An interval between two adjacent fixing blocks forms a positioning groove 10.

(12) A fixing block 9 on a far left and a fixing block 9 on a far right are limiting blocks.

(13) The one end of the first spring 5 is connected to the first pulling hook 11. The another end of the first spring is connected to the second pulling hook 12. The first pulling hook 11 is connected to the positioning seat 3 along the X direction. The second pulling hook 12 is connected to an inner wall of the armrest 2 along the X direction.

(14) The one end of the second spring 6 is connected to the third pulling hook 13. The another end of the second spring is connected to the fourth pulling hook 14. The third pulling hook 13 is connected to the positioning seat 3 along the Z direction. The fourth pulling hook 14 is connected to an inner wall of the armrest 2 along the Z direction.

(15) When in use, the armrest 2 is lifted up so that the positioning bayonet 7 is separated from the positioning groove 10. Then the armrest 2 moves backward in the X direction. One end of the armrest 2 is rotatably connected with the backrest, as a distance that the armrest 2 moves backward increases, the backrest gradually tilts backward. When the backrest is in an initial unchanged state, the backrest is 90 perpendicular to the seat cushion, and the positioning bayonet 7 enters a first positioning groove 10 from right to left. When inclined backward by 20, the positioning bayonet 7 enters a second positioning slot 10 from right to left. When the positioning bayonet 7 is in the second positioning slot 10, the backrest is inclined 20 degrees backward, and the user can lean back on the backrest. When adjusting the inclination angle of the backrest, a user is able to insert the positioning bayonet into different positioning grooves 10. If the positioning bayonet disposed is changed to be inserted into an adjacent left positioning groove, the backrest should be inclined backward by 20. When the positioning bayonet moves to the last positioning groove 10, the user can lie on the backrest, which helps the user to relax after sitting for a long time.

(16) Meanwhile, under an elasticity of the first spring 5, the armrest 2 slows down a speed of the backrest tilting backward, and the two ends of the first spring 2 are connected with the first pulling hooks 11 and the second pulling hook 12. Under an elasticity of the second spring 6, the armrest 2 are accelerated to fall, so that the positioning bayonet 7 quickly enters the positioning groove 10, and the backrest is positioned quickly. Thus, the backrest is positioned quickly, preventing an occurrence of the situation where the backrest is still inclined backward due to lack of positioning, which has a good use effect.

(17) Although the present disclosure has been illustrated and described with reference to the optional embodiments, those of ordinary skill in the art should understand that various changes in form and details can be made within the scope of the present disclosure.