Patent ID: 7263704

Claim:
A disk clamper comprising: a clamper main body including a base portion having a contact surface that contacts a disk, and a first peripheral wall provided on a side of said base portion opposite to said contact surface; a lid body including a second peripheral wall attached to the inside or outside of said first peripheral wall; and an attraction member made of a magnet or a magnetic body, said attraction member being held in the inside of said first or second peripheral wall, wherein one peripheral wall of said first and second peripheral walls has a peripheral surface substantially in the shape of a cylindrical surface, and the other peripheral wall contacts said peripheral surface to thereby be fitted to the inside or outside of said one peripheral wall, and wherein said clamper main body and said lid body include separate first and second engaging mechanisms, wherein said first and second peripheral walls respectively have first and second engaging members that form said first engaging mechanism and that engage each other in an axial direction of said peripheral surface when said first and second peripheral walls are in predetermined relative positions in a circumferential direction of said peripheral surface; and wherein said main body and said second peripheral wall have respectively first and second locking members, separately located from said engaging members, that form said second engaging mechanism and lock each other in a circumferential direction.