| 摘要 |
<p>The seat (1) has a return unit (2), and an elastic unit (23) that is mounted on a shaft (21) and comprising a positioning end (231) and a contact end (232). The positioning unit is fixed to the shaft, and the contact end is provided in contact with a backrest (11). A restriction unit (24) is connected to the shaft and includes a restriction part (241) and another restriction part (242). The former restriction part limits tilting of the backrest, and the latter restriction part limits angulation of the backrest when the backrest returns to an original position.</p> |
