Patent ID: 8234665

Claim:
A disk device comprising: a casing equipped with an insertion port through which a disk is inserted; a conveying mechanism configured to convey the disk, which is provided inside the insertion port; a movable member provided between the insertion port and the conveying mechanism, wherein the movable member is moved in a disk thickness direction in response to movement of the disk inserted through the insertion port in an insertion direction; a mechanical switching type detecting switch that is switched to a first detection state in accordance with a movement force of the movable member in the disk thickness direction disk inserted from the insertion port in an insertion direction; and an optical detecting member that is switched to a second detection state when the disk inserted from the insertion port blocks an optical path, wherein when the detecting switch is switched to the first detection state, power supply to the optical detecting member is started such that power consumed by the disk device while waiting for disk insertion is reduced.