| 摘要 |
<p>PURPOSE:To utilize the opening/closing operation of a cover to load a cassette or the like by oscillating a driving arm interlocking with the opening/closing operation of the cover and engaging and coupling other mechanical elements with the driving arm. CONSTITUTION:When the cover 1 is manually pressed and rotated against the exciting force of a twist spring 10, a small gear 4 engaged with an inner gear 1b formed on a supporting arm 1a of the cover 1 is rotated and the driving arm 6 excited by a spring 8 is also rotated. Even if the driving arm 6 is stopped after the end of required work volume, the rotation of the small gear 4 is not interrupted because of the existence of play generated by the difference of opening angles between a fan-shaped recessed part 6b formed on the driving arm 6 and a fan-shaped projection 4b formed on the small gear 4, the closing of the cover 1 is sufficiently rotated up to a locking position and exciting force is accumulated in the twist spring 10. To open the cover 1, the accumulated force of the twist spring 10 is released by releasing a locking means, so that the cover 1 is rotated, the small gear 4 is also rotated, the wall of the projection 4b formed on the small gear 4 is abutted upon the wall of the recessed part 6b formed on the driving arm 6, and the driving arm 6 exactly follows the opening of the cover 1 so as to rotate.</p> |
