Kabushiki Kaisha Toshiba

Haruyuki Kurihara

Nobuyuki Tanaka

Shigeru Hoshina

Kiyoji Kikuchi

A disk drive apparatus comprises a disk for recording data and a drive motor for rotating the disk. The disk has obverse and reverse sides, a center hole, an unlevel portion with an uneven flatness on the obverse and reverse sides, situated around the center hole, and a level portion situated outside the unlevel portion and having level surfaces on the obverse and reverse sides. The disk is mounted on a hub of the motor such that the hub is passed through the center hole. The hub has at its one end a supporting portion facing the level portion of the disk. A disk retainer, having a press portion facing the level portion of the disk, is attached to the other end of the hub so as to press the disk toward the supporting portion.

Growing community of inventors

Tokyo, Japan

Haruyuki Kurihara