Patent ID: 6976264

Claim:
An optical disk adapter, comprising an external periphery having a size capable of being fitted in a 12 cm-disk placing dented portion ( 72 ) of a disk-transferring tray ( 71 ) in a disk player (P) and a positioning central aperture ( 2 ) ( 22 ) ( 32 ) ( 42 ) in which an optical disk (C 1 ) (C 2 ) (C 3 ) having a size smaller than that of a 12 cm-optical disk is fitted in a non-restricted state, a center of the positioning central aperture ( 2 ) ( 22 ) ( 32 ) ( 42 ) and that of an adapter main body ( 1 a ) being positioned concentrically, wherein the optical disk adapter is provided with a dented portion ( 4 ) for allowing a relative passing of a disk damper ( 85 ) in the disk player (P) at an upper surface thereof and a rotation prevention member ( 3 ) for preventing a rotation of the optical disk adapter against the disk-transferring tray ( 71 ) at a lower surface thereof, and wherein the optical disk adapter is provided with an optical disk entering prevention protrusion ( 3 a ) on a lower surface of the disk damper passing dented portion ( 4 ) and a protruded portion ( 5 ) which comes into contact with a driving unit ( 81 ) which holds an optical pickup ( 86 ) and a disk turntable ( 83 ), and wherein the optical disk adapter is supported in a state in which a rear end of the adapter is lifted from a bottom surface of the 12 cm-disk placing dented portion ( 72 ) when a driving unit ( 81 ) is lifted.