Disc recording and/or reproducing apparatus having disc exchange function

摘要

A disc recording/reproducing apparatus for selectively taking out a disc housed within a housing unit for recording or reproducing information signals on or from the disc is disclosed. The apparatus includes a housing unit for housing a plurality of sub-trays each configured for setting a disc on it in a direction normal to the disc surface direction so that the discs lie parallel to one another, a disc recording/ reproducing unit provided within a main member of the apparatus, a main tray for holding a selected sub-tray and for being horizontally shifted between a first position of being protruded from the main member of the apparatus and a second position within the main member of the apparatus, transfer means for selectively taking one of the sub-trays out of the housing unit and/or housing the sub-tray thus taken out in the housing unit, lift means for shifting the transfer means and the main tray shifted to the second position between the disc recording/ reproducing unit and the housing unit, detection means for detecting the position of the lift means and control means for controlling the lift means based on an output signal of the detection means. The apparatus also includes disc presence/ absence detection means for detecting whether or not there is a disc on the sub-tray pulled out by the transfer means from the housing unit. The control means controls the operation of the lift means based on an output of the disc presence/ absence detection means. The control means shifts the main tray to the first position when an output signal of the disc presence/ absence detection means indicates the absence of the disc on the sub-tray pulled out by the transfer means. The control means actuates the lift means for uplifting or lowering the tray and the transfer means for loading the disc on the sub-tray on the disc recording/ reproducing unit when an output signal of the disc presence/ absence detection means indicates the presence of the disc on the sub-tray pulled out by the transfer means.