| 摘要 |
PURPOSE:To facilitate correcting operation, to improve the productivity and to reduce the cost by providing many fitting holes to voice coil motor magnet, adjusting the fitting position of the link plate to correct the tilt of a head arm thereby correcting thermal off-track by the link plate only. CONSTITUTION:The carriage base and the link plate having different thermal expansion rates are used and the carriage base and the link plate are decided depending on the tilt of the head due to environmental temperature is using the device. When the thermal off-track is large, the attaching position of the link plate is changed to apply adjustment to obtain proper correction. That is, a voice coil motor 12 gives force in a direction required for an arm support block 15, connected to the shaft 14 by the link plate 16 and plural screw holes 201 corresponding to the fitting holes 161 of the link plate 16 are provided to the upper face of the voice coil motor magnet 20 on a concentric circle around the shaft 14. In increasing the number of the screw holes 201 on the voice coil motor magnet 20 depending on the adjusting quantity, fine adjustment is executed.
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