| 摘要 |
<p>PURPOSE:To miniaturize, lighten and remarkably reduce the cost of a device by providing only a cylinder driving means and a capstan driving means as an actuator to function the device. CONSTITUTION:A rotary head drum driving means to give a rotation to a rotary head drum 9 equipped with a rotary head, a capstan driving means 29 to give a rotation to a capstan 18 moving a magnetic tape at a prescribed speed, an action mode changing-over means to change-over the action mode of a device and a driving means to detect the relative speed difference in the rotational speed of the rotary head drum and the capstan and to drive positively and reversely or stop the action mode changing-over means by the rotary head drum driving means and the capstan driving means with the relative speed difference are equipped. Thus, as the actuator of a device, the rotary head drum motor and the capstan motor only are used and the wide decrease in cost, miniaturization and lightening can be contrived.</p> |
