Abstract: An apparatus for data transfer with a magnetic disk having a metal made hub attached centrally thereto, with the hub having a first opening defined centrally therein and a second opening defined eccentrically therein. The apparatus includes a turntable mounted on a drive spindle which is engageable in the first opening in the hub of the magnetic disk loaded on the turntable. A retractable drive pin is mounted eccentrically on the turntable so as to be sprung into engagement in the second opening in the disk hub upon register therewith. In order to assure engagement of the drive pin in the second opening in the disk hub immediately upon loading of the magnetic disk on the turntable, a disk drive motor for driving the turntable via the drive spindle is connected to a supply terminal via a power control switch.

Abstract: A front-loading disc player of improved construction, having a disc supporting member which is mounted in a housing to be slidable between an externally protruding position for loading or unloading a recording disc and a position contained within the housing, for playing the disc contents, featuring a simplified mechanical configuration whereby the disc supporting member only moves along a single direction, i.e. substantially horizontally, with the turntable and pick-up unit being mounted together on a swinging member which is swung upward or downward to respectively engage or disengage the turntable from the recording disc supported on the disc supporting member.