| 摘要 |
PROBLEM TO BE SOLVED: To solve deformation of a lid caused by rotational force of a coil spring under a condition where a lid is closed by fixing a nail part on the lid to hook it with a lock lever and hooking it with one end of the coil spring. SOLUTION: Under a condition where a lid 1 is closed, a nail part 7 and a lock lever 5 are hooked together. As the nail part 7 is fixed on the lid 1, the lid 1 is locked. Then, as the end part 3b of a coil spring is hooked on the nail part 7, a rotational force is always worked on the nail part 7. However, as the nail part 7 is not completely fixed on the lid 1, the lid 1 does not receive any actuating force from the coil spring. In addition, to open the lid 1 from the condition where the lid 1 is closed, hooking between the nail part 7 and the lock lever 5 is released by rotating the lock lever 5. The end part 3b of the coil spring is hooked on the nail part 7 and the actuating force of the coil spring acts on the lid 1 and the lid 1 is rotated around supporting shafts 1b and 1f as centers to open the lid. |
