| 摘要 |
PURPOSE: To surely clean a lens surface without imparting an excess load even for an optical head unit with a slope sensor by providing plural kinds of cleaning bodies whose projecting lengths from a disk surface are different. CONSTITUTION: When a disk body 1 is set in a disk device, the optical head 2 starts to read from a read-in track B. Four pieces of brush bodies 3 whose projecting amount from the disk surface is a prescribed value are planted on the track B in a 90 deg. equally divided state. Further, the brush bodies 4 whose projecting amount is different from the former are arranged on a play track C so as to place between the brush bodies 3 respectively. Thus, the disk is rotated stably and evenly. |
