Abstract: A spindle motor includes a shaft 6 which is rotatably supported; a rotor casing 7 which is turned together with the shaft 6; and a turn table 9 which is fixedly mounted on one end portion of the shaft 6 and is rotated with a disk 10 mounted thereon. An eccentric member 12 is loosely fitted on the part of the shaft 12 which is located between the rotor casing 7 and the turn table 9. The eccentric member 12 is turned with the rotation of the rotor casing 7. In place of the eccentric member, a ball may be arranged which is rolled around the shaft.

Abstract: A spindle motor includes a shaft 6 which is rotatably supported; a rotor casing 7 which is turned together with the shaft 6; and a turn table 9 which is fixedly mounted on one end portion of the shaft 6 and is rotated with a disk 10 mounted thereon. An eccentric member 12 is loosely fitted on the part of the shaft 12 which is located between the rotor casing 7 and the turn table 9. The eccentric member 12 is turned with the rotation of the rotor casing 7. In place of the eccentric member, a ball may be arranged which is rolled around the shaft.

Abstract: Disclosed is a dc motor comprising a motor frame; a flexible magnet fixed on the motor frame; a rotor having a rotor core, the rotor core having windings and confronting the flexible magnet; a rotating shaft for rotating integrally with the rotor; a commutator secured to the rotating shaft; a brush body coming in slidable contact with the commutator and supplying power to control driving of the rotor; a brush body holder, made of an insulating resin, for holding the brush body; and an engaging device for engaging the brush body with the flexible magnet.