| 摘要 |
PURPOSE: To facilitate release of the rotary speed difference of a lid and improve the operational characteristics without using a damper means. CONSTITUTION: When the lid 2 is fixed through a lock means 27 at the closing position where the opening of a box-shaped body 1 is closed and the lock means 27 is released, in the lid opening/closing mechanism rotationally switching the opening to the opening direction with the urging force of the urging means 4, the urging means 4 can achieve the problem to be solved by the lid 2 constituted of a first spring member urgingly moving the lid 2 from the midway between the opening position and the closing position to the opening position and a second spring member urgingly moving the lid 2 from the closing position to the nearby position of the midway. |
