Chair back cushioning adjustment device and chair with seat back cushioning adjustment device

Abstract

A seat back buffer adjustment device is arranged on a seat and connected to a seat back, and includes a shell unit, and an adjustment unit including an elastic module and an adjustment module. The shell unit includes a fixed base arranged at the bottom of the seat, a bottom shell pivoted on the front end of the fixed base through a first pin, and a bottom shell pivoted on the fixed base through a second pin. The rear end of the seat is pivoted to the seat back seat of the bottom shell by a third pin. The chair back seat is used for setting the chair back and has a pushing block. The pushing block includes a sliding surface with a long-distance part and a short-distance part. The elastic module has a pivot end pivoted on the first pin, an abutting end opposite to the pivot end, and an elastic member. The adjusting module can move the abutting tip between the long-distance part and the short-distance part in conjunction with it, and can adjust the moment acting on the elastic module with the third pin as a fulcrum, and generate a restoring force.

Description

technical field [0001] The invention relates to an adjustment device and a chair with the adjustment device, in particular to a chair back buffer adjustment device and a chair with the seat back buffer adjustment device. Background technique [0002] After entering the industrial and commercial society, people are used to sitting on chairs to handle various affairs. However, due to long-term and bad sitting posture, it is easy to cause shoulder and neck pain, and even back pain and other symptoms. Therefore, an ideal chair should not only provide users with a comfortable riding experience, but also be able to easily adjust its seat and its seat. back to avoid the user from forming an unhealthy sitting posture. [0003] In particular, many ergonomic studies have pointed out that the inclination angle and rebound force of the chair back have a great influence on the user's intervertebral disc and lumbar spine muscles. Therefore, there are a dazzling array of chairs with adju...

AI Technical Summary

Problems solved by technology

[0004] However, the adjustment mechanism not only has more connecting rods and connecting components, but also leads to a complex link structure, which is not conducive to production and assembly.

On the other hand, because the adjustment rod modules are all in the form of a screw and an adjustable nut, the adjustment is time-consuming and inconvenient

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