AUTOMATIC BALANCING DEVICE, ROTATION DEVICE, AND DISC DRIVING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an automatic balancing device capable of improving balance of rotation without relying on attitude and to provide a rotation device and a disc driving device loaded with this automatic balancing device. SOLUTION: This automatic balancing device 10 is constituted to hold a balancer 11 by magnetic field 2 formed by a magnet 6 and yokes 7 and 9. Consequently, when the automatic balancing device 10 starts its rotation, the magnet 6 or the like can rotate the balancer 11 stably in a holding condition without relying on attitude of the automatic balancing device 10. COPYRIGHT: (C)2007,JPO&INPIT