| 摘要 |
PURPOSE:To prevent the rotating wear by constituting such that a brush is brought into contact with a slip ring only in a specific reproducing mode with a comparatively low using frequency so as to be conducted. CONSTITUTION:In all modes except the specific reproducing mode, that is, recording and normal reproducing modes, an arm 9 provided with the brush 7 is rotated clockwise by a spring 8 with a fulcrum shaft 10 as a center, and the brush 7 is separated by the slip ring 6. On the other hand, a solenoid coil 11 is conducted in the specific reproducing mode to attract a solenoid coil 12, and an L-type lever 14 is rotated counterclockwise by a spring 13. Then the arm 9 is rotated counterclockwise through a lever 15, and the brush 7 is press-contacted with the slip ring 6. Thus a servo head controlled voltage is supplied to piezoelectric elements 3 and 3' fitted to a rotary head. |
