| 摘要 |
PURPOSE:To reduce damages of a magnetic sheet and magnetic head with stable output, by making it possible to move the head into the best contact state corresponding to the floating state of the magnetic sheet by making it possible to vary the rotational frequency of the magnetic sheet. CONSTITUTION:To the shaft of motor 10, the center part of magnetic sheet 13 on stable plate 12 is fixed by fixture 11. Magnetic head 14 is fixed to bimorph plate 15, the other terminal of which is fixed 2nd bimorph plate 16 with its other terminal fixed to fixed table 17. As motor 10 is driven by rotation control circuit 18, magnetic sheet 13 rotates along stable plate 12. When sheet 13 moves from position (b)-(a) through the rotation, command circuit 19 drives bimorph driver circuit 20 and magnetic head 14, moved in X and Y directions by bimorph plates 15 and 16, comes in the best contact state with magnetic sheet 13. Consequently, the output of the magnetic head is stabilized and damages of magnetic sheet 13 and magnetic head 14 can be reduced. |
