Disk installing device for a disk player

A disk installing device for a disk player adapted to employ both a first disk and a second disk comprising:

• a centering hub axially slidably mounted on the output shaft of a driving motor, and having a plurality of first taper centering parts positioned to fit the center hole of the first disk and formed in the circumference of a flange of said centering hub at regular angular intervals, and a second taper centering part dimensional to fit the center hole of the second disk and having an outside diameter smaller than that of a circle corresponding to the outer circumferences of the first taper centering parts;
• a turn table with a supporting surface fixed to the output shaft of the driving motor and provided with cut-out parts corresponding in position to the first taper centering parts of the centering hub and formed so as to receive the first taper centering parts therein when the second disk is placed on the turn table;
• means having a compression coil spring for axially biasing the centering hub toward the supporting surface of the turn table from one side thereof;
• and
• a clamping member for pressing the first disk or the second disk toward the supporting surface of the turn table from th other side thereof so that the first disk or the second disk is held firmly by said clamping member and is centered on the turn table by said centering hub.