Disk drive with hook disposed on clamp arm and/or playback base engaging groove formed in fixed base

摘要

When a disk ( 1 ) is placed at a playback position, a clamp arm ( 15 ) clamps the disk ( 1 ). The clamp arm ( 15 ) has an engagement hook ( 16 ) for engaging with an engagement groove ( 12 ) of a fixed base ( 11 ) when the clamp arm ( 15 ) pivots on a slide base ( 13 ) so as to return to a standby position for waiting for a pivot while the slide base ( 13 ) slides.