| 摘要 |
PURPOSE:To decrease number of channels of a rotary transformer by arranging a toggle switch and a changeover means to the upper face of a rotary drum and connecting plural heads in parallel with the rotary transformer via the toggle switch. CONSTITUTION:A changeover contact point of the toggle switch 2 fixed in a radial direction of the upper face of the rotary drum 1 is connected to one end of heads 4, 5 with different application but no used at the same time. The toggle switch changeover means 3 consists of a concentric press-contact rings 31, 32 switching the switch 2 and depressing members 33, 34 whose one end is fixed. In applying the pressing force to the pressing members 33, 34 the rings 31, 32 is pressed into contact with the switch 2 and changed over and restores to the original position when the depressing force is lost. Since the the head 4 is selected into the head 5 by the changeover of the toggle switch 2, number of channels of the rotary transformer 6 is reduced by one. |
