Depending on the materials and processing methods used to manufacture the chair, the chair can be divided into solid wood chairs, curved wooden chairs, molded plywood chairs, bamboo and rattan chairs, metal chairs and plastic chairs. Generally speaking, no matter what kind of material is caused by the chair, is the frame and contact with the human body of the two parts of the surface, through a variety of connections, collaborative completion of the human body needs different functional requirements.
Frame is the basic structure of chair forming, plays the role of supporting the human body, in order to meet the practical function of the premise, can be conceived at will, the form can be ever changed. Depending on the material used, it can be divided into wooden frame, metal frame and bamboo and rattan frame, and its structure varies according to the type and material selection of the chair.
Wood frame is generally composed of front legs, hind legs, upper brain, watchboard, pull, plug angle, etc. , because the chair in the process of use, often subject to the repeated action and impact of external forces, in order to meet the strength, stability and stiffness requirements, the wooden frame is generally made of hard-circumebrasion. When using conifer, in order to increase strength, the section size of the components should be increased appropriately.