| 摘要 |
PROBLEM TO BE SOLVED: To prevent deformation of optical disc due to heat occurred in a spindle motor, by providing a stator core arranged oppositely to a rotor magnet with a predetermined gap between them and stator coils wound round a plurality of tooth poles, thereby constituting a stator, and by fixing the bearing of a rotation shaft by including the stator in a base. SOLUTION: Rotor magnets 4 are fixed along the outer face of circumference of a rotor 3 rotating around a rotation shaft as a center. And a stator is formed by a stator core 6 consisting of a plurality of tooth poles 7 made of a magnetic material arranged opposite to the rotor magnets 4 in radial direction with a predetermined gap provided between them. And the stator is included in a base 9 made of a resin and a bearing 2 of a rotation shaft 1 is fixed. By doing this, expansion or deformation of an optical disc due to heat generated by a spindle motor 11 can be prevented. |
