| 摘要 |
<p>PURPOSE:To make the promotion of wafer-thin form attainable by supporting an eccentric gear, being engaged with a driving gear at all times or at the specified timing, pivotally on a slider being energized in one direction by a resilient means supported on a support member free of reciprocation. CONSTITUTION:In an eccentric cam mechanism 519, when an eccentric gear 167 pivotally supported on a slider 160 is engaged with a driving gear 154b and rotated, a distance from the turning center of a contact position is varied, and thereby the slider 160 moves so as to separate from the driving gear 154b against energizing force of a spring. Next, when rotation of the eccentric gear 167 advances and the distance from the turning center of the contact position becomes shorter, the slider 160 goes to double acting so as to comes nearer to the driving gear 154b by dint of the spring energizing force. Thus, an eccentric cam member is constituted without installing a special cam part, and the thickness can be thus thinned.</p> |
