| 摘要 |
A disc drive apparatus mounted with an improved clamping mechanism for driving a disc to rotate is composed of a rotor and a stator, which supports the rotor rotatable freely. The rotor includes a rotor yoke, a clamping section for clamping down a disc on the rotor yoke, a boss and a shaft. The rotor yoke is constituted by a regulating surface for regulating a position in an axial direction of the disc clamped down on the rotor yoke by the clamping section and a center hole. The boss is constituted by a base section in disciform having a through hole and an outer peripheral wall section in an annular shape extending outward around the base section with perpendicularly intersecting to the base section. The boss fastens the rotor yoke by engaging the center hole of the rotor yoke with an outer circumferential surface of the outer peripheral wall section at the bottom. The shaft is fixed to the boss by being inserted into the through hole of the boss. The stator includes a bearing in a cylindrical shape supporting the shaft in a radial direction, a bearing holder holding the bearing at a position crossing a plane including the regulating surface of the rotor yoke and a motor base fixed with the bearing holder.
|
