| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk drive unit in which the number of flexible cantilever beams made of a resin can be increased and the disk centering function is improved for high-speed rotation. SOLUTION: The disk drive unit has a resin rotary table main part 4 mounted on a revolving shaft 2 of a spindle motor 1. The rotary table 4 comprises an annular projecting part 4aa, and a projecting part 4a for fitting into a disk hole which extends outward in a radial direction and includes five centering sections 4ab having guide surfaces easily slidable with the edge of a disk hole (h), a disk placing part 4d which is coupled and formed on an outer peripheral side of the projecting part 4a for fitting into the disk hole and receives one surface of the disk D, a through-hole H which is formed between the adjacent centering sections 4ab and 4ab, and the two flexible cantilever beams B, B which extend outward in the radial direction from the annular projecting part 4aa in the respective through-holes H and in which downwardly curved front ends T come into elastic contact with the walls of the disk hole (h). COPYRIGHT: (C)2008,JPO&INPIT
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