Backward leaning type office chair with self-adaptive waist supporting function

Abstract

The invention discloses a back-leaning type office chair with a self-adaptive waist supporting function. The back-leaning type office chair comprises a chair seat, a chair back and two armrests, wherein a transverse rod extending left and right is arranged on the bottom surface of the front part of the chair seat; the front ends of the armrests are rotationally connected to the ends of the transverse rod in a sleeving mode, and the armrests are lifted upwards to the position above the chair seat from front to back, then bent laterally and wound to the rear ends of the armrests behind the chair back to be hinged to the rear surface of the chair back; a transverse shaft extending leftwards and backwards is arranged on the rear portion of the chair seat, a swing arm is arranged between the end of the transverse shaft and the side edge of the bottom end of the chair back, the front end of the swing arm is fixedly connected to the end of the transverse shaft, and the rear end of the swing arm is hinged to the side edge of the bottom end of the chair back; the chair back is driven by the armrests to turn backwards around the transverse rod and synchronously turns backwards around the rear ends of the armrests when turning backwards around the transverse rod; and a rotation limiting mechanism is arranged on the rear portion of the chair seat and used for limiting the rotation range of the transverse shaft. The office chair of the invention has the beneficial effect that the waist can be well supported when a person leans backwards.

Description

technical field [0001] The invention relates to an office chair, in particular to a reclineable office chair with waist self-adaptive support. Background technique [0002] In the prior art, the comfort and multifunctionality of office chairs, such as forward and backward tilting, seat adjustment, and chair back adjustment, are becoming more and more demanding. [0003] For example, the prior art publication number CN109349844A discloses an office chair suitable for sedentary people, including an office chair body, an office chair body, armrests are fixedly installed on the left and right sides of the office chair body, and the bottom of the office chair body is fixedly installed. There is a fixed rod, the end of the fixed rod far away from the bottom of the office chair body is fixedly equipped with a support leg, the middle part of the end of the support leg far away from the fixed rod is provided with a moving wheel, the inner side of the armrest and the top on the left a...

AI Technical Summary

Problems solved by technology

[0006] These office chairs have the following problems: firstly, the support position of the chair legs for the seat is located in the middle of the seat, and these office chairs are all used in office situations, especially at desks. Some of them adopt a forward-leaning sitting posture. The center of gravity of the upper body is relatively forward, and there is a distance between the seat and the seat supported by the legs. After long-term use, structural damage, aging and deformation are likely to occur between the seat and the legs.

Secondly, the reclining function of the back of the chair is not good, and the support for the user's waist is insufficient when reclining, which may easily cause waist muscle fatigue, and even prone to problems such as lumbar disc protrusion

Furthermore, the adjustment function of the chair seat is also poor, and there is no corresponding reasonable adjustment method according to the office application environment.

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