JPH0551978B

A disk installing device for a disk player comprises a centering hub (4) both for centering a video disk (15) and for centering a compact disk (20) having a center hole having a diameter smaller than that of the video disk (15), and a turn table (3) for supporting and rotating the video disk (15) or the compact disk (20). The centering hub (4) has three taper walls (6) formed in the outer circumference thereof at regular angular intervals for centering the video disk (15) and a taper boss (5) for centering the compact disk (20), and is axially slidably attached to the output shaft of a driving motor (1). The turn table (3) is fixed to the output shaft of the motor (1), and is provided in the flange thereof with three holes (9) for receiving the taper walls (6) therein, respectively, when the compact disk (20) is placed on the turn table (3), the same is centered by the taper boss (5) of the centering hub (4), and the centering hub (4) is moved axially toward the turn table (3) to position the compact disk (20) at a predetermined correct position.