| 摘要 |
The backrest has an upper back unit (2) encompassing a lower back unit (3) on the same height by using a sliding guide (5), for developing a vertically movable and stable connection. Left and right pins are attached to the lower back unit, where the pins are vertically moved in a guide (4) of a backrest frame (1). The lower back unit is provided with the pins, which run in two guides of the backrest frame. Independent claims are also included for the following: (1) an adjuster for adjusting the back length of a backrest (2) an upper back unit of a backrest (3) a lower back unit of a backrest (4) a backrest cushion. |
