Abstract: An apparatus for transferring a pickup of a disc drive which is movably installed on a pickup deck to move the pickup for recording/reproducing information by emitting light onto a disc. The appartus includes a lead screw rotatably installed at one side of the pickup deck, wherein a plurality of screw grooves are formed on an outer circumferential surface of the lead screw, and a slider coupled to the pickup and having at least one first protrusion closely inserted in the screw grooves of the lead screw to convert a rotational motion of the lead screw to a linear motion of the pickup. The pickup also has at least one second protrusion inserted in the screw grooves of the lead screw to prevent the first protrusion from being separated from the screw grooves of the lead screw.

Abstract: An optical disc changer includes a main body, a tray installed in the main body to be capable of sliding, a roulette rotatably installed at the tray and where a plurality of optical discs are accommodated, an optical pickup device to selectively reproduce one of the optical discs accommodated on the roulette, a drive gear member installed at the main body, rotated by being connected to a drive unit, and selectively engaged with a rack gear member formed on the bottom surface of the tray, and a tray gear unit installed adjacent to the drive gear member and having a tray gears selectively engaged with the rack gear member and the drive gear member.

Abstract: An optical disc changer having a main body, a tray slidably installed in the main body, a roulette rotatably installed at the tray to accommodate a plurality of optical discs, an optical pickup device to selectively reproduce one of the optical discs accommodated on the roulette, and a damping unit to absorb shock when the tray is loaded in and unloaded from the main body to prevent defective reproduction of data from the optical disc.

Abstract: An optical disc changer includes a main body, a tray installed in the main body to be capable of sliding, a roulette rotatably installed at the tray and where a plurality of optical discs are accommodated, an optical pickup device to selectively reproduce one of the optical discs accommodated on the roulette, a drive gear member installed at the main body, rotated by being connected to a drive unit, and selectively engaged with a rack gear member formed on the bottom surface of the tray, and a tray gear unit installed adjacent to the drive gear member and having a tray gears selectively engaged with the rack gear member and the drive gear member.

Abstract: An optical disc changer having a main body, a tray slidably installed in the main body, a roulette rotatably installed at the tray to accommodate a plurality of optical discs, an optical pickup device to selectively reproduce one of the optical discs accommodated on the roulette, and a damping unit to absorb shock when the tray is loaded in and unloaded from the main body to prevent defective reproduction of data from the optical disc.

Abstract: A roulette driving apparatus used with a roulette-type disc changeable player to rotate a roulette where a plurality of discs are loaded, including a motor, a worm gear installed on the rotation shaft of the motor, and a driving gear rotating in a state in which it is geared to the worm gear and to a gear provided on the roulette, transmitting power generated from the motor to the roulette. Since the roulette driving apparatus used with a roulette-type disc changeable player is configured to transmit power from a motor directly to a roulette through a worm gear and a driving gear, the number of parts can be greatly reduced compared to the conventional apparatus. Also, since the number of power transmission steps is reduced, the reduction ratio is reduced so that a desired angle of rotation of the roulette can be achieved by driving the motor to a lesser extent, thereby considerably reducing noise generated by driving the roulette.

Abstract: A disk player includes a frame constituting a main body of the disk player, and a magazine for stacking a plurality of trays, each tray holding a disk thereon, and which can be inserted into and ejected from the frame. A chuck is mounted to the frame, for pressing the upper surface of a selected disk drawn out from the magazine. A turntable is mounted to the frame enabling up and down movement, together with the chuck for chucking the drawn-out disk when ascending. An extractor is mounted to the frame enabling forward, backward, upward and downward movement with respect to the magazine, for selectively combining with a selected tray among the plurality of trays in the magazine and drawing out the selected tray between the turntable and the chuck. An elevating mechanism is provided for elevating the extractor, and a loading motor is installed on the frame.