| 摘要 |
An opening and closing device includes a first plate (120) that can be rotated relative to a base plate, a first shaft (160) that is provided in the first plate, a second plate (130) that can be rotated and slid relative to the first shaft, a second shaft (180) that is provided in the second plate, a third plate (140) that can be rotated relative to the second shaft, a detachable system (190) configured to lock the third plate and the first plate in a state in which the first plate, the second plate, and the third plate are superposed, and configured to separate, upon application of force to rotate the third plate, the third plate from the first plate; a bias system (200) configured to bias the second plate in a direction to separate from the second shaft along the first shaft; and a restriction system (150) configured to allow the second plate to slide along the first shaft in a state in which the second plate is superposed to the first plate, and configured to restrict the second plate from sliding along the first shaft in a state in which the second plate is rotated with respect to the first plate around the first shaft. |
