Adjustable office chair

Abstract

The invention discloses an adjustable office chair, and relates to the technical field of office chairs. The chair comprises a chair seat and a chair back, wherein the chair back consists of an elastic back mesh and a frame for supporting the periphery of the back mesh; the frame is connected with a radian adjusting device used for enabling the elastic back net to be close to the back of the human body. The radian adjusting device comprises a positioning rod which is vertically arranged behind the elastic back net; expansion pieces are respectively arranged on the upper and lower sides of the positioning rod; the other end of the expansion piece is hinged with the positioning rod; a sliding groove is correspondingly formed in the middle of the positioning rod in the vertical direction; a mounting seat is slidably connected into the sliding groove; an adjusting screw rod is vertically arranged in the sliding chute; the adjusting screw rod is rotationally connected with the mounting rod; the mounting seat is in threaded connection with the adjusting screw rod; the mounting seat is forwards connected with an extension rod; the left and right sides of the front part of the extension rod are respectively connected with extension arm rods. The chair has the beneficial effects that the arched supporting part of the chair back can be flexibly adjusted, the adaptability to different users is wider, and the comfort level is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of office chairs, and particularly to an adjustable office chair. Background Art

[0002] An office chair refers to various chairs equipped for work convenience in daily work and social activities, and is very commonly used. Since many workers sit on office chairs for a long time every day, office chairs have relatively high requirements for comfort.

[0003] At present, in order to improve comfort, office chairs usually have a backrest with a curvature that fits the human back better. On this basis, some office chairs are also provided with an adjustable backrest inclination angle to further enhance comfort. However, due to the individual differences of office workers and the fact that the curvature of the backrest itself is not easily changed, the curvature of the backrest cannot fit everyone. Especially in the arched support part of the backrest, the comfortable positions felt by each person are different, resulting in poor comfort for some office workers when they lean against the backrest, affecting the fatigue relief effect of the office chair. Summary of the Invention

[0004] The technical problem to be solved by the present invention is, aiming at the above-mentioned existing technical deficiencies, to provide an adjustable office chair which can flexibly adjust the arched support part of the backrest, has a wider adaptability to different users, and higher comfort.

[0005] The technical solution adopted by the present invention is: to provide an adjustable office chair, including a seat and a backrest. The backrest is composed of an elastic back net and a frame supporting the periphery of the back net; a curvature adjusting device for making the elastic back net approach the human back is connected to the frame;

[0006] The curvature adjusting device includes a positioning rod vertically arranged behind the elastic back net; telescopic devices are respectively arranged on the upper and lower sides of the positioning rod; one end of the telescopic device is hinged to the frame, and the other end is hinged to the positioning rod; a chute is correspondingly opened vertically in the middle of the positioning rod; a mounting seat is slidably connected in the chute; an adjusting screw rod is arranged vertically in the chute; the adjusting screw rod is rotationally connected to the mounting rod; the mounting seat is threadedly connected to the adjusting screw rod; an extension rod is connected forward on the mounting seat; expansion arm rods are respectively connected to the left and right sides of the front part of the extension rod; a flexible extrusion rod is connected to the end of the expansion arm rod far away from the extension rod; the arc-shaped surfaces of the two extrusion rods are respectively located on the left and right sides behind the elastic back net.

[0007] To further optimize the technical solution, the adjusting screw rod of an adjustable office chair is driven by a forward and reverse reduction motor fixed on the positioning rod; a storage battery for supplying power to the forward and reverse reduction motor is fixed on the seat.

[0008] Further optimize this technical solution. A threaded extension rod of an adjustable office chair penetrates through a mounting seat; a collar is coaxially and rotatably connected to the front part of the extension rod; the extension arm rod is fixedly connected to the collar.

[0009] Further optimize this technical solution. A pressing rod of an adjustable office chair is connected to a corresponding extension arm rod through a supporting spring.

[0010] The beneficial effects of the present invention are as follows:

[0011] The elastic back net can have a large elastic deformation amount. The arc adjustment device can more conveniently adjust the arc of the elastic back net, and the elastic back net will not be damaged during the arc adjustment. Telescopic devices are respectively arranged on the upper and lower sides of the positioning rod. One end of each telescopic device is hinged to the frame, and the other end is hinged to the positioning rod. By changing the telescopic amounts of the two telescopic devices, the angle of the positioning rod relative to the elastic back net can be changed; by rotating the adjusting screw rod and the mounting rod, the position of the mounting seat in the sliding groove can be changed, and the height position of the pressing rod behind the elastic back net can be changed; by changing the angle of the positioning rod and the height position of the pressing rod, the position of the support of the pressing rod on the elastic back net and the degree of arching can be adjusted, thereby improving the comfort of different users sitting on the office chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a structural schematic diagram of the present invention;

[0013] Figure 2 is Figure 1 a partial structural schematic diagram of the upper part;

[0014] Figure 3 is a structural schematic diagram of the arc adjustment device from a top-down perspective.

[0015] In the figure, 1, seat; 2, backrest; 3, elastic back net; 4, frame; 5, positioning rod; 6, telescopic device; 7, sliding groove; 8, mounting seat; 9, adjusting screw rod; 10, extension rod; 11, extension arm rod; 12, pressing rod; 13, forward and reverse reduction motor; 14, battery; 15, collar; 16, supporting spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0017] As Figure 1 shown, an adjustable office chair includes a seat 1 and a backrest 2. The backrest 2 is composed of an elastic back net 3 and a frame 4 that supports the periphery of the back net; a curvature adjustment device for moving the elastic back net 3 closer to the human back is connected to the frame 4;

[0018] As Figure 1-2As shown in the figure, the arc adjustment device includes a positioning rod 5 vertically arranged behind the elastic backrest net 3; telescopic devices 6 are respectively arranged on the upper and lower sides of the positioning rod 5; one end of the telescopic device 6 is hinged to the frame 4, and the other end is hinged to the positioning rod 5; a chute 7 is correspondingly opened vertically in the middle of the positioning rod 5; a mounting seat 8 is slidably connected in the chute 7; an adjusting screw rod 9 is arranged vertically in the chute 7; the adjusting screw rod 9 is rotatably connected to the mounting rod; the mounting seat 8 is threadedly connected to the adjusting screw rod 9; an extension rod 10 is connected forward on the mounting seat 8; expansion arm rods 11 are respectively connected to the left and right sides of the front part of the extension rod 10; a flexible extrusion rod 12 is connected to one end of the expansion arm rod 11 away from the extension rod 10; the arc-shaped surfaces of the two extrusion rods 12 are respectively located on the left and right sides behind the elastic backrest net 3.

[0019] When an office worker leans against the elastic backrest net 3 of the chair back 2, due to individual differences, the original supporting arc of the elastic backrest net 3 will not make all users feel comfortable. Especially when the elastic backrest net 3 arches to support the user's back, due to differences in the user's height, body shape and other aspects, in order to make different users comfortable, there are also differences in the supporting position and the degree of arching.

[0020] In this solution, first, by rotating the adjusting screw rod 9, the position of the mounting seat 8 in the chute 7 can be changed, so as to adjust the height position of the extrusion rod 12 at the rear side of the elastic backrest net 3. Then, by adjusting the telescopic amounts of the two telescopic devices 6, the extrusion rod 12 can support and arch the elastic backrest net 3, so that its arc changes. Moreover, the change in the telescopic amount of the telescopic device 6 can change the degree of support and arch of the extrusion rod 12 on the elastic backrest net 3, thereby realizing the separate control of the support position and the arching degree of the elastic backrest net 3, and meeting the comfort requirements of different users.

[0021] In addition, the above actions can also produce an expansion effect, that is, through the continuous change of the position of the extrusion rod 12 and / or the arching degree of the elastic backrest net 3, the extrusion rod 12 can also massage the user's back, effectively expanding the diversified functions of the office chair and further improving the effect of relieving fatigue of the office chair.

[0022] The expansion arm rod 11 presses the arc-shaped surface of the extrusion rod 12 against the elastic backrest net 3. The extrusion rod 12 can be made of flexible materials such as rubber, silica gel, and sponge, which can reduce the wear on the elastic backrest net 3, make the movement of the extrusion rod 12 smoother, and improve the comfort of the user's feeling.

[0023] Such as Figure 1-2As shown in the figure, the adjusting screw rod 9 is driven by a forward and reverse reduction motor 13 fixed on the positioning rod 5; a storage battery 14 for supplying power to the forward and reverse reduction motor 13 is fixed on the seat 1. The storage of electricity in the storage battery 14 improves the flexibility of the office chair, eliminating the need to connect an external power cord when operating the arc adjustment device and enhancing safety. The forward and reverse reduction motor 13 can control the adjusting screw rod 9 to drive the mounting seat 8 to move up or down along the sliding groove 7, making it more labor-saving and convenient to change the height of the extrusion rod 12. Of course, the telescopic device 6 can also adopt an electric drive structure and use the storage battery 14 to supply power to control the telescoping.

[0024] As Figure 2-3 shown in the figure, the extension rod 10 is threaded through the mounting seat 8; a collar 15 is coaxially rotatably connected to the front part of the extension rod 10; the extension arm rod 11 is fixedly connected to the collar 15. The threaded connection between the extension rod 10 and the mounting seat 8 can further expand the range of the amplitude by which the extrusion rod 12 can support and arch the elastic backrest net 3; the setting of the collar 15 can cause an appropriate difference in the height of the extrusion rods 12 on both sides through the appropriate rotation of the collar 15 on the extension rod 10, further enhancing the comfort of the support for the user. For example, it can meet the requirement for the difference in the support height on the left and right sides of the back when the user is sitting sideways.

[0025] As Figure 3 shown in the figure, the extrusion rod 12 is connected to the corresponding extension arm rod 11 through a supporting spring 16. Through the supporting spring 16, there can be a greater elastic variation margin when the extrusion rod 12 supports the user, improving the comfort when the user leans against it.

[0026] It can be understood that the present invention is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present invention, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. An adjustable office chair, comprising a seat (1) and a backrest (2), characterized in that: The backrest (2) is composed of an elastic back net (3) and a frame (4) that supports the periphery of the back net; a curvature adjustment device for moving the elastic back net (3) closer to the human back is connected to the frame (4); The curvature adjustment device includes a positioning rod (5) vertically arranged behind the elastic back net (3); telescopic devices (6) are respectively arranged on the upper and lower sides of the positioning rod (5); one end of the telescopic device (6) is hinged to the frame (4), and the other end is hinged to the positioning rod (5); a chute (7) is correspondingly opened vertically in the middle of the positioning rod (5); a mounting seat (8) is slidably connected in the chute (7); an adjustment screw rod (9) is arranged vertically in the chute (7); the adjustment screw rod (9) is rotationally connected to the mounting rod; the mounting seat (8) is threadedly connected to the adjustment screw rod (9); an extension rod (10) is connected forward on the mounting seat (8); expansion arm rods (11) are respectively connected to the left and right sides of the front part of the extension rod (10); a flexible extrusion rod (12) is connected to the end of the expansion arm rod (11) far from the extension rod (10); the arc surfaces of the two extrusion rods (12) are respectively located on the left and right sides behind the elastic back net (3).

2. The adjustable office chair according to claim 1, characterized in that: The adjustment screw rod (9) is driven by a forward and reverse reduction motor (13) fixed on the positioning rod (5); a storage battery (14) for supplying power to the forward and reverse reduction motor (13) is fixed on the seat (1).

3. The adjustable office chair according to claim 1, characterized in that: The extension rod (10) threadedly penetrates through the mounting seat (8); a collar (15) is rotationally connected coaxially to the front part of the extension rod (10); the expansion arm rod (11) is fixedly connected to the collar (15).

4. The adjustable office chair according to claim 1, characterized in that: The extrusion rod (12) is connected to the corresponding expansion arm rod (11) through a supporting spring (16).

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