| 摘要 |
A disk drive device has a substantially cylindrical hub supported rotatably by a pivot. A disk is fitted on the hub coaxially with a ring shaped spacer and a clamp member mounted on the end portion of the hub. The spacer has a contact portion which contacts with the disk, and the clamp member is fitted on the hub by a shrinkage fitting and holds the spacer in a state contacting with the disk. One of the spacer and the clamp member has an engaging portion which engages with the other member at the time of the shrinkage fitting of the clamp member, and the other one has a guide surface which contacts with the engaging portion and guides the spacer in a direction wherein a center of the contact portion coincides with the rotation center of the hub by contacting with the engaging portion.
|
