Patent ID: 7676818

Claim:
A disk unit wherein a disk inserted is loaded to the interior of the disk unit by automatic loading with use of plural arms, said arms being able to convey two types of disks different in diameter while supporting an outer periphery edge of each of the disks, or a disk already received in the interior of the disk unit is unloaded to the exterior of the disk unit with use of said plural arms, said disk unit comprising a limit switch, said limit switch being adapted to operate to start a deformed disk unloading operation when a tip of a guide arm pivots to excess in a centripetal direction relative to a predetermined position at which it should stop while supporting a side portion of a small-diameter disk, said guide arm functioning to conduct large- or small-diameter disks being conveyed to a predetermined position at which being able to clamp the disk by a clamp head while supporting side portions of the disks, wherein the deformed disk is defined by a narrower shape than the small-diameter disk.