| 摘要 |
PURPOSE:To track a head chip to a track pattern by making a head base by an elastic material, providing a permanent magnet to the base and using an electromagnetic coil provided to a fixed cylinder so as to attract or repulse the permanent magnet thereby displacing a head chip in the rotation axial line direction. CONSTITUTION:In case of the fast reproduction, electromagnetic coils 14, 14A, 14B are energized, a permanent magnet 13 is attracted to bend the head base 101A downward. Further, the rotary direction of the head chip 102 is in a direction shown in arrow 16, then currents increasing stepwise from the coil 14A to the last coil 14B are applied to the electromagnetic coils 14A, 14, 14B so that the attraction of the permanent magnet 13 is increased as the head chip 102 is rotated from the coil 14A toward the coil 14B and the head chip 102 which were to be moved along a straight line B if such attraction would not exist, is moved along a straight line A. |
