Patent ID: 9648957
Date: 2017-05-16
CPC Classifications: A47C

Claim:
1. A chair comprising: a cushion, having a chassis; a back, and an adjustment structure, connected to the chassis, comprising: a base frame, having a main body with a connecting arm rotatably connecting the chassis; and a back frame, connected between the back and the base frame, having a connecting portion connected to the base frame and a support substantially perpendicularly extending from the connecting portion toward the back, an arc-shaped bend portion being formed between the support and the connecting portion, and a top of the support being connected to the back; wherein the bend portion will further stretch to make the back tilt more when the back is pressed, the support is provided with two positioning plates, each positioning plate has a positioning hole, the connecting portion, the back is formed with two positioning recesses corresponding to the positioning plates in position and shape, two fixing holes are formed in the positioning recesses for corresponding to the positioning holes, and two fasteners are inserted into the positioning holes and the fixing holes to fasten the support to the back.