| 摘要 |
The seat (10) comprises a seating part (13), a back support (12) and a common support (14) for both of them. The seating part alone is rotatable in relation to the common support around a vertical axis (A), and has a normal usage position in which it can be locked automatically. After being freed from the locked position, the seating part can turn through at least a restricted angle around its axis. The lock device can free the seat and permit it to turn from its normal usage position as soon as the seat is subjected to an external minimal turning moment acting around the rotation axis (A). |
