| 摘要 |
PURPOSE:To facilitate the locking operation and enable a cell to be held securely, by providing a stopper which is unlocked as a cover is moved and is locked automatically as the cover is set completely. CONSTITUTION:With a cover 6 opened, a spring acting resilient part 14 is pushed upward by the resilient force of an arm 15 and inclination of a tapered slot 12, to fit a projection 15a into a recess 13. When the cover 6 is moved to the left, an enqoging piece 21 of a stopper 5 makes contact with a tapered rib 18 to generate a force component directed downward due to a slope 18a, thereby pressing the stopper 5 downward. Consequently in the spring acying resilient part 14, fitting the of projection 15a of the arm 15 is released and the stopper 5 moves downward. When the engaging piece 21 goes beyond the slope 18 of the tapered rib 18, as the force which presses the stopper 5 downward dissapears, the stopper 5 moves upward again to fit the projection 15a into the recess 13. Under this condition, the engaging piece 21 enters a stopper holding part 20 to keep the cover 6 locked to a body casing 1. |
