CN202858404U

CN202858404U - Backrest adjustable chair

Info

Publication number: CN202858404U
Application number: CN 201220460607
Authority: CN
Inventors: 黄景明
Original assignee: DONGYE (FUJIAN) FURNITURE Co Ltd
Current assignee: FUJIAN DONGYE FURNITURE TECHNOLOGY CO., LTD.
Priority date: 2012-09-11
Filing date: 2012-09-11
Publication date: 2013-04-10
Anticipated expiration: 2022-09-11

Abstract

The utility model relates to a backrest adjustable chair, which comprises a seat, a backrest and a bottom bracket, wherein the bottom bracket comprises a front bracket and a rear bracket; the front bracket and the rear bracket are connected through cross arms at two ends of the seat; a supporting rod is fixed on each of two sides of the backrest; the two supporting rods are coaxially hinged on the cross arms; a clamping groove frame is hinged at each of two ends of the rear side of the backrest; each clamping groove frame is provided with a series of clamping grooves; a clamping groove positioning rod is arranged between the tail ends of the two cross arms; the clamping grooves are clamped at proper positions through the clamping groove positioning rod, so that the backrest is locked at the required position, and the aim of changing the included angle between the backrest and the seat is fulfilled; and the backrest adjustable chair has the advantages of simple structure, convenience in machining, low cost and the like.

Description

A kind of backrest adjustable chair

Technical field

The utility model relates to field of furniture, in particular a kind of backrest adjustable chair.

Background technology

Along with popularizing and the continuous increase of people's workload of computer, the sitting crowd is more and more, yet the seat support of conventional chair and the angle between the backrest are normally fixing, and it is very limited that user's sitting posture is adjusted mode, very easily produce fatigue, bring out easily the diseases such as lumbar vertebrae, cervical vertebra.

In the majority with for vehicle-mounted fixedly seat design of existing recliner, connect by elastic connecting device between backrest and the seat support, rely on human body that backrest is applied with individual power backward, make between the backrest seat support and produce strain, to reach the purpose of adjusting the backrest elevation angle, but this structural requirement elastic connecting device has very high support strength and stability, and is all higher to the requirement of material and production technology, is unsuitable for promoting in common office or family expenses chair.

The utility model content

The purpose of this utility model is to solve the problems of the technologies described above, and a kind of simple in structure, the backrest adjustable chair that is easy to process is provided, and the user can adjust angle between backrest and the seat support according to self needs, to obtain comfortable sitting posture.

For achieving the above object, technical solution of the present utility model is: a kind of backrest adjustable chair, comprise seat support, backrest and bottom bracket, bottom bracket includes front carriage and posterior bracket, front carriage is connected the seat support two ends with posterior bracket crossbearer connects, the both sides of described backrest are fixed with respectively support bar, described two support bars are coaxial to be hinged on the crossbearer, the two ends of described backrest rear side are hinged with the draw-in groove frame, the draw-in groove frame is provided with a series of draw-in grooves, is provided with the draw-in groove backstay between the described two crossbearer ends.

Preferably, also be provided with fixed bar between described two front carriage, posterior bracket and the crossbearer.

Preferably, described draw-in groove frame is rectangle.

Preferably, described draw-in groove is zigzag.

Preferably, the two ends of described seat support are provided with and bottom bracket all-in-one-piece handrail.

By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: the utility model by the draw-in groove backstay with the draw-in groove card in place, thereby backrest lock is fixed on the desired position, reach thus the purpose that changes angle between backrest and the seat support, have simple in structure, be convenient to processing, low cost and other advantages.

Description of drawings

Fig. 1 is the structural representation of a kind of backrest adjustable chair of the utility model.

The specific embodiment

Further specify the utility model below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, a kind of backrest adjustable chair of the present utility model, comprise seat support 1, backrest 2 and bottom bracket 3, the two ends of seat support 1 are provided with and bottom bracket 3 all-in-one-piece handrails 7, bottom bracket 3 includes front carriage 31 and posterior bracket 32, front carriage 31 is connected with posterior bracket by crossbearer 33 connections at seat support 1 two ends, described two front carriage 31, also be provided with fixed bar 34 between posterior bracket 32 and the crossbearer 33, by fixed bar 34 stationary forward supports 31, posterior bracket 32, the both sides of described backrest 2 are fixed with respectively support bar 5, described two support bars, 5 coaxial being hinged on the crossbearer 33, the two ends of described backrest 2 rear sides are hinged with rectangle draw-in groove frame 21, draw-in groove frame 21 is provided with a series of zigzag draw-in grooves 211, be provided with draw-in groove backstay 6 between described two crossbearers, 33 ends, zigzag draw-in groove 211 is stuck on the draw-in groove backstay 6, backrest 2 elevations angle that the screens of different zigzag draw-in grooves 211 is corresponding different, thus the purpose of angle between backrest 2 and the seat support 1 is adjusted in realization.

Above-described, only be a preferred embodiment of the present utility model, can not limit the scope that the utility model is implemented, every equalization of doing according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. a backrest adjustable chair is sub, comprise seat support, backrest and bottom bracket, bottom bracket includes front carriage and posterior bracket, front carriage is connected seat support (1) two ends with posterior bracket crossbearer connects, the both sides of described backrest are fixed with respectively support bar, it is characterized in that: described two support bars are coaxial to be hinged on the crossbearer, and the two ends of described backrest rear side are hinged with the draw-in groove frame, the draw-in groove frame is provided with a series of draw-in grooves, is provided with the draw-in groove backstay between the described two crossbearer ends.

2. a kind of backrest adjustable chair according to claim 1 is characterized in that: also be provided with fixed bar between described two front carriage, posterior bracket and the crossbearer.

3. a kind of backrest adjustable chair according to claim 1 is sub, and it is characterized in that: described draw-in groove frame is rectangle.

4. according to claim 1 or 3 described a kind of backrest adjustable chairs, it is characterized in that: described draw-in groove is zigzag.

5. a kind of backrest adjustable chair according to claim 1 is sub, and it is characterized in that: the two ends of described seat support are provided with and bottom bracket all-in-one-piece handrail.