CHAIR BACK BUFFERING ADJUSTING device AND CHAIR INCLUDING THE SAME

Abstract

A chair back buffering adjusting device is arranged on a chair seat and is connected to the chair back, and includes a shell seat unit and an adjustment unit including an elastic module and an adjustment module. The shell seat unit includes a fixed base arranged at the bottom of the chair back, a bottom shell pivoted at the front end of the fixed base through a first pin and a chair back seat pivoted at the rear end of the fixed base through a second pin and pivoted at the bottom shell through a third pin. The chair back seat is used for arrangement of the chair back and has push block. The push block includes a glide surface having a long distance part and a short distance part. The elastic module has a pivoting end pivoted on the first pin and a propping end opposite to the pivoting endand an elastic piece. The adjustment module can realize linkage with the propping end to glide between the long distance part and the short distance part, and can adjust the acting moment of the elastic module using the third pin as a fulcrum and restoration force is generated.

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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