| 摘要 |
<p>PURPOSE:To obtain many operating modes while saving the space by using an electromagnet of the same type so as to change over the 2nd and 3rd modes selectively from the 1st operating mode. CONSTITUTION:In energizing the electromagnet 53 in the stop state as shown in figure, the attraction by a moving piece 53a is inactivated and a cam 26 is unlocked by the energizing force of a spring 54 and a rod 45 is moved to the right. An intermittent part is moved by the outside part 26b of the 2nd cam, a gear 25 and a cam gear 26 mesh with each other, the cam starts being turned, a control rod 48 is driven by the outside part 26b of the 2nd cam and the moving piece 53a of the electromagnet is restored to the attracting state. When the 1st restoration, the attracted rod 45 is biased to the left without power application, the head base 40 is lifted up to attain the reversing play mode. When power is applied with the 1st restoration, the rod is turned along with the outside part 26b of the 2nd cam and the head base 40 is lifted up with the rod 45 biased to the right to cause the forward play mode.</p> |
