| 摘要 |
<p>PURPOSE: To simplify operating position holding by acting a magnetically holding function on a mechanically holding device. CONSTITUTION: An operating member 14 is turned with a driving motor 1a via a mechanism 1b and a head attaching plate 7 is turned clockwise. When an electric magnet 120 is electrically energized, an armature magnetic pole 124 is magnetized. When an armature plate 131 is transferred toward a corresponding magnetic pole 124 with a functional element 11, the armature plate is stuck to the magnetic pole 124, whereby a plate 7 is held in a reproducing position. When a member 14 is further rotated, a spring 19 is relaxed. The magnet 120 is stopped energizing in order to return to a suspending position from the reproducing position. Although the element 11 is transferred to the suspending position, a locking nose 133 is abutted to a locking pin 135 to suspend. Although the plate 131 is separated from the magnetic pole 124, a plate 138 is not separated from the magnetic pole with a holding force by a plastic arm 141. The electric magnet 120 is electrically energized again in order to hold the element 11 in a second operating position. By this way, operating position holding is simplified with a small number of parts.</p> |
