| 摘要 |
PURPOSE: A chair with a rotary backrest is provided to allow a user to comfortably lean his or her back on the backrest which can be restored to its original location when pressurization is removed. CONSTITUTION: A chair with a rotary backrest comprises a seat plate (1) which is formed with a lumbar support, a chair frame (2) in which the seat plate is fixed on the top thereof, and a backrest (4) which is rotationally fixed to the support legs of the chair frame. A rotary part includes a fixed main body (31) and a movable main body (32). The movable main body is inserted into the fixed main body which is formed on the upper end of the support legs formed on the rear end of the chair frame. An elastic spring is installed in movable main body which is formed on both sides of the backrest. |
