US Patent 7406006 Disk apparatus

A disk apparatus includes a plurality of stockers each for stocking a disk therein, a plurality of stocker moving mechanism arranged around the plurality of stockers, for, when stocking a disk in one of the plurality of stockers and when playing back a disk stocked in one of the plurality of stockers, moving the one of the plurality of stockers upward or downward, each of the plurality of stocker moving mechanism having small-diameter portions at upper and lower ends thereof, and an actuation member movably arranged in a gap between the small-diameter portion of one of the plurality of stocker moving mechanism and an inner surface of a wall of a housing.