Patent ID: 7984458

Claim:
A disk unit wherein a disk inserted by a pivoting arm is loaded to the interior of the disk unit or a disk accommodated in the interior of the disk unit is unloaded to the exterior of the disk unit, characterized in that there are provided a plurality of arms able to convey two types of disks different in diameter while supporting an outer periphery edge of each of the disks, wherein the plurality of arms can convey the two types of disks different in diameter while supporting the outer periphery edge of each of the disks in at least three positions, wherein an arm for the conveyance of a small-diameter disk is retracted from a conveyance path of a large-diameter disk and is out of contact with the large-diameter disk, thereby permitting conveyance of the large-diameter disk, and wherein the arm for conveyance of the small-diameter disk provides a propelling force only to the small-diameter disk.