Abstract: A disc changer comprises a receiving unit for receiving a plurality of discs, a base unit, a playback unit and a transfer unit for transferring one of the plurality of discs to the playback unit. The transfer unit is movable in the perpendicular direction to the base unit. The playback unit has on its opposite ends swing support axes. The playback unit is swingable around the swing support axes relative to the base unit and the transfer unit, respectively. The playback unit has a gear. The base unit has a base unit-gear segment portion and the transfer unit has a transfer unit-gear segment portion. The gear is held between the base unit-gear segment portion and the transfer unit-gear segment portion so as to engage with these gear segment portions.

Abstract: An apparatus for transferring a movable body comprises a rack having flexibility, a pinion for driving the rack and a guide device for guiding the rack. The guide device has a curved portion. The pinion may locate along the curved portion of the guide device. The movable body comprises a disc.

Abstract: A movable body supporting mechanism supports a movable body (12, 42) to be moved in a direction orthogonal to a flat surface, on which a fixed member (11, 41) and the movable body are both mounted. The movable body supporting mechanism is provided with: a lever (13a, 13b, 46a, 46b) rotatably linked to the fixed member and the movable body; a movable body gear (18a, 18b, 52) mounted on the movable body at a side thereof opposed to the fixed member; and a pinion (14a, 14b, 44a, 44b) engaged with the movable body gear and driven in conjunction with the lever.