| 摘要 |
PURPOSE:To provide a drum horizontally to facilitate designing and assembling by rotating a magnetic head together with a supporting rod synchronously with the rotation of the rotary drum and moving the magnetic head vertically in a window in accordance with oscillation of the supporting rod due to oscillating means simultaneously. CONSTITUTION:Not only a capstan and a rotary drum 13 are driven to a magnetic tape T but also driving signals are supplied to piezo-electric elements 18 and 19 through a driving circuit 26 to expand and contract them, thereby moving vertically rotary magnetic heads 21 and 22. By relative motions of heads 21 and 22 and the tape T, heads 21 and 22 trace the surface of the tape T in an oblique direction to form a helical recording track on the tape T, and information is reproduced from the helical recording track. Thus, fixed and rotary drums are installed horizontally to facilitate designing and assembling. |
