Abstract: A disc player device includes a tray transfer mechanism for transferring a tray, supporting a disc thereon, from a magazine, a clamper for holding the disc, and a clamper drive mechanism for transferring the clamper to a turntable. The disc is held by the turntable with the clamper transfer mechanism held out of contact with the clamper, and in this condition a playback of the disc is carried out. After the playback of the disc is finished, the disc is again clamped, and is returned to a predetermined position by the clamper transfer mechanism. The tray transfer mechanism, the clamper, the clamper drive mechanism are driven by a common motor.

Abstract: The invention is intended to simplify the mechanism of a disk changer. The disk changer includes a magazine body accommodating a plurality of trays therein, a lock piece for locking the magazine inserted into a changer body, and a tray transferring device for transferring a tray from the magazine thus locked. The tray transferring device serves to unlock the lock piece.

Abstract: There is disclosed a disk loading device capable of transferring a disk without damaging a face of the disk. The disk loading device includes a roller movement mechanism for moving a roller toward and away from a path of transfer of the disk, and a roller drive mechanism for rotating the roller. The roller is brought by the roller movement mechanism into contact with an outer peripheral surface of the inserted disk, so that the disk is transferred by the rotational drive force of the rotating roller in a predetermined direction. For discharging the disk, the outer peripheral surface of the disk is urged by an eject mechanism operatively connected to the roller drive mechanism, so that the disk is ejected.

Abstract: Disclosed is a magnetic recording and reproducing device which comprises a reversible motor, a first gear fixed to the shaft of the motor, a second gear and a pulley rotatably supported by the shaft of the motor, a first one-way clutch for transmitting the torque of the first gear to the second gear only when the motor is operating forwardly, a second clutch mechanism for transmitting the power of the first gear to the pulley only when the motor is operating backwardly, a cassette transfer mechanism engageable with the first gear, a magnetic tape running mode switching mechanism engageable with the second gear, and a magnetic tape running mechanism engageable with the pulley, whereby a plurality of mechanisms are driven by a single motor.