| 摘要 |
PURPOSE:To realize a counter mechanism which displays an accurate quantity of recording on a magnetic sheet, by turning the slit of a counter dial only when a head moves in the recording direction. CONSTITUTION:When a pack 4 is set, a counter pin 13 is pushed down if a projection 14 and a slit 2 are at different positions. Thus a head 8 moves toward an arrow 9, and the upper surface of the projection 14 slides the lower face of a counter dial 1. As a result, only the pin 13 rotates although a worm 18 rotates. When the projection 14 is turned up to the position of the slit 2, both the pin 13 and a clutch 16 are pushed upward. Then the dial 1 indicates the recording scale through the slit 2 in response to the shift of the head 8 toward the recording direction. When the head 8 comes back from the final direction position, the hook is released between the clutch 16 and the pin 13. Thus the dial 1 does not turn. In such a way, an accurate recording quantity is displayed. |
