Disc drive apparatus

A disc drive apparatus comprising:

• a disc carrying means for loading and unloading a disc;
• a turntable to be loaded with a disc carried in by the disc carrying means;
• a pickup unit to read out information recorded in the disc;
• a pickup transport means for transporting the pickup unit in a radial direction of the disc loaded on the turntable;
• a driving source;
• a first transmission system to transmit power of the driving source to the pickup transport means;
• a second transmission system to transmit the power of the driving source to the disc carrying means;
• and
• a transmission route changing means for changing a transmission route linking to the driving source from either one of the first and second transmission systems over to another transmission system,
• the pickup transport means further comprising:
• a motive body enabling to rotate reversibly by means of power transmitted through the first transmission system;
• and
• a driven body linking to the motive body and the pickup unit,
• wherein the driven body moves reciprocally and linearly in a transport direction of the pickup unit by means of reversible rotation of the motive body, and moves with being accompanied by the pickup unit within a movable range of the pickup unit and moves independently out of the movable range of the pickup unit, and
• wherein the transmission route changing means conducts to change the transmission route linked to the driving source from the first transmission system over to the second transmission system when the driven body is moved independently out of the movable range of the pickup unit while the pickup unit is stopped at one end of the movable range of the pickup unit.