Kabushiki Kaisha Sankyo Seiki Seisakusho

Shunji Matsushima

Masataka Kurata

Hidenao Ichimura

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

Spindle motor and turn table assembly having structure for canceling unbalanced centrifugal force

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.

Spindle motor and turn table assembly having structure for canceling

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.

Growing community of inventors

Nagano, Japan

Shunji Matsushima