| 摘要 |
An end of a bracket for cushion, is arranged along a lock segment (202). A spring (209) is arranged such that bracket is tilted. A lock shuttle (150) arranged in a casing, is guided between a position securing bracket in upright position and a position where it ceases spring force. Another spring (207) is accommodated in recess of the lock shuttle and maintaining its shape by the casing having lid (140) which forms a cap for the recess. |
