| 摘要 |
<p>PURPOSE:To reduce ejecting operation force by using a reversing spring for momentarily generating elastic pressure energizing force at the time of passing through a dead point position in place of a spring for energizing a head plate in the play direction. CONSTITUTION:When a connecting line between supporting shafts 17 and 18 is positioned on a dead point line (n), spring force of the reversing spring 16 works between the supporting shafts 17 and 18 as resiliency, did not act on the head plate 7 as energizing force in its moving direction. When the supporting shaft 17 is moved from this state to the left and passed over the dead point line (n), the spring force acts as energizing force in the moving direction of the supporting shaft 17 for the first time. That is, in a forward half process of moving forth the head plate 7 from a nonplay position to a play position, spring force of springs 27 and 28 and the spring force of the reversing spring 16 are operated, and subsequently in the later half, energizing force due to the reversing spring 16 is operated to such an extent that no backlash of the plate 7 takes place principally by an external vibration.</p> |
