DISK HEAD ACTUATOR DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a disk head actuator device which is high in the displacement of a laminated piezoelectric element, can avert the problem of strength and is high in the accuracy of displacement. SOLUTION: This device has a main actuator for largely displacing a timing head and an actuator for finely adjusting a head position. An ultrasonic motor 9 is used as an auxiliary drive source for fine adjustment. The timing head 1 is moved in the circumferential direction of a disk by the ultrasonic motor 9.