| 摘要 |
PURPOSE:To hold a lid body once in a designated intermediate position and to easily shut the lid body when it is pressed down further without generating a collision sound by a method wherein one out of a shaft and a spring-elastic bearing part is installed at the lid body and the other is installed at a frame body. CONSTITUTION:A bearing part 3 is installed at a lid body 1, and a shaft is fixed to a frame body 2. Alternatively, the shaft is installed at the lid body 1 and the bearing part 3 is installed at the frame body. The bearing part 3 is formed of a spring-elastic plastic such as a polyacetal resin, and the shaft has outer circumferential faces 41 to 46 whose cross-sectional shape is a regular hexagon. Consequently, the bearing part 3 presses the outer circumferential faces of the shaft toward the axial-center by its spring elasticity. In a state that the lid body 1 has been opened, the bearing part 3 presses the outer circumferential faces 43, 46 of the shaft. When the lid body 1 is shut from the state, the bearing part 3 is shifted to the outer circumferential faces 42, 45 from the outer circumferential faces 43, 46, and the lid body 1 is stopped once and held. When the lid body 1 is pressed down further, the bearing part 3 is shifted to the outer circumferential faces 41, 46 from the outer circumferential faces 42, 45, and the lid body 1 is set to a shut position in a state covering the frame body 2. |
