Patent ID: 7246362

Claim:
An optical disk drive comprising: a tray including first and second loading portions respectively loading a first disk and a second disk of a smaller diameter than the first disk, the first and second loading portions having different heights, a first inclined portions formed obliquely outward on an edge of the first loading portion and a second inclined portion formed obliquely inward with respect to edges of the first and second loading portions, and a separation preventing portion extending over the first loading portion to prevent the first disk from separating from the first loading portion; a spindle motor having a turntable supporting the disks on one plane of the disks and rotating the disks, said spindle motor approaching/separating from the disks; and a clamp rotatably supporting the disks on the other plane of the disks, wherein the clamp approaches the disks due to a magnetic force exerted between the clamp and the turntable as the spindle motor approaches the disks.