Abstract: A multi-disc player testing apparatus for testing whether the multi-disc player satisfies the specific requirements is provided. The multi-disc player includes a carousel having multiple disc-accommodating areas and a disc-positioning sensor. The carousel defines a plurality of indicating slots for identifying each disc-accommodating area. The disc-positioning sensor scans the indicating slots to produce wave pulses in a form corresponding to the indicating slots. The multi-disc player includes a measuring module for receiving the wave pulses from the disc-positioning sensor, and measuring and comparing the number of the wave pulses and durations of each pulse with predetermined values to determine whether the multi-disc player satisfies the specific requirements.

Abstract: A device for storing optical discs is disclosed. The device includes a housing, a carousel arranged in the housing for movement relative to the housing, the carousel having a plurality of storage compartments each for storing a disc, an opening in the housing through which a disc can pass, drive means for driving the carousel relative to the housing to align each of the storage compartments and a disc stored in that storage compartment in registry with the opening, and an ejection system to eject a disc from a storage compartment and through the opening in said housing. The ejection system is powered by a motor and a clutch system, and control means is provided to cause said carousel to rotate and to cause the ejection system to operate as instructed by a user.

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 cam structure is equipped with a first cam that displaces a first follower section in a radial direction, a second follower section that rotates with the first cam and has at least three support pins, and a second cam that displaces the second follower section in an axial direction. The first cam is formed from divided segments defining at least three arcuate surfaces with different radiuses and sloped connection surfaces that connect the arcuate surfaces and are provided in ranges that give appropriate pressure angles with respect to the first follower section, and the second cam is provided with cam sections, each of the cam sections being divided in the radial direction in the number corresponding to the number of the support pins. The divided cam sections of the second cam are disposed at positions arranged in a circumferential direction in a manner that displacements in the axial direction of the second follower section are timed with displacements in the radial direction of the first follower section.

Abstract: An annular disc holder is provided for holding a plurality of discs. The disc holder is rotatably mounted on a base and is guided by a guiding device provided between the disc holder and the base so as to be rotated about an axis.

Abstract: The present invention relates to method and apparatus for determining presence or absence of a disk and size of a disk inserted in a disk holder of a multi-disk changer. A disk size determining apparatus of a multi-disk changer of the present invention, includes a turntable, a plurality of disk holders installed at same distance from the center of the turntable, each disk holder being able to hold a disk of different size selectively, and a single light-emitting element or a single photo-detecting element above or below the turntable, wherein said each disk holder has holes at same distance from the center of the turntable, each hole passing through a light-beam from the light-emitting element in order that the disk size can be determined. A manufacturing cost of a multi-disk changer can be reduced owing to usage of a single detecting sensor.

Abstract: The present invention relates to method and apparatus for determining presence or absence of a disk inserted in a disk holder of a multi-disk changer. A disk size determining apparatus of a multi-disk changer of the present invention, includes a turntable, a plurality of disk holders installed at same distance from the center of the turntable, each disk holder being able to hold a disk of different size selectively, and a single light-emitting element or a single photo-detecting element above or below the turntable, wherein said each disk holder has holes at same distance from the center of the turntable, each hole passing through a light-beam from the light-emitting element in order that the disk size can be determined. A manufacturing cost of a multi-disk changer can be reduced owing to usage of a single detecting sensor.

Abstract: A memory storage disk handling system includes a housing, an elevator pin mounted on the housing for lifting disks, a servo motor with a cam arm. The servo motor rotates to pivot the cam arm, which cams against the elevator pin to lift the elevator pin.