Patent ID: 7493633
Filing Date: 2009-02-17
Classification: G11B

Abstract:
1. A drive motor for a recording disk, in which a disk-shaped recording disk having a central hole is mounted on a rotor, for rotating about a rotational center axis of the rotor, the drive motor for a recording disk comprising: a rotor holder; a centering portion located around the rotational center axis on the rotor holder, wherein a radially outer peripheral surface of the centering portion makes a center of the recording disk be aligned with the rotational center axis of the rotor holder by contacting with an inner circumference of the central hole of the recording disk; a recording disk mount surface formed on the rotor holder at a radially outer peripheral area of the centering portion; a positioning portion disposed on the rotor holder; and a plurality of chucks located radially in the centering portion, wherein each chuck comprising: