| 摘要 |
An office chair is composed of a backrest, a seat, a support leg for supporting the seat, a sliding device, a locating device, and a control device. The sliding device includes two frame members and two sliding members. The locating device includes two toothed plates, two rotary plates and two elastic rods. The control device includes a press plate, an elastic rod, and a control rod. The backrest of the office chair can be adjusted back and forth to give a constant support to the back of an office worker seated on the office chair. |
