Patent ID: 7533395

Claim:
A disk apparatus comprising: a stationary frame to be a stable portion, and a floating unit which is disposed in said stationary frame through elastic component and which performs recording and/or reproducing on a disk-shaped recording medium, wherein said floating unit comprises a clamping member including a clamper which holds said disk-shaped recording medium, and a disk recording/reproducing-driving member including a turn table, and a part of said clamper and a part of said turn table are fitted in each other, when said disk-shaped recording medium is held between said clamper and said turn table, wherein a claw of a clamper-holding part is engaged with a hook portion of said clamper near the internal position of the center hole of said disk-shaped recording medium held between said clamper and said turn table, and wherein the part of said clamper is fitted in an annular groove formed in a shaft portion of said turn table at its engaging position, wherein the hook portion is formed at the center portion of said clamper, and wherein said hook portion includes a plurality of hooks formed at regular intervals on the same circumference, and a projection which is formed on the center axis of rotation of said disk-shaped recording medium and which comes into contact with said clamper-holding part when said disk-shaped recording medium is held between said clamper and said turn table.