Patent ID: 6195225
Filing Date: 2001-02-27
Classification: G11B

Abstract:
A disk drive comprising a receiving mechanism for receiving a disk as a received disk, on which data is recorded, an ejecting mechanism for ejecting said received disk, a carriage mechanism having a head unit for access to said received disk and holding a head unit so that said head unit is movable in a radial direction of said received disk, a moving mechanism for moving said carriage mechanism, a disk table for holding and rotating said received disk, and a drive motor for rotating said disk table, said receiving mechanism, said ejecting mechanism, said carriage mechanism, and said moving mechanism being mounted on a principal surface of a chassis which is made of metal, wherein:said chassis has a U-shaped section with side walls formed on each side thereof;said disk drive further comprises a motor chassis of metal and a printed wiring board mounted on said motor chassis to form a stator of said drive motor on said back surface of said chassis;said stator including a plurality of stator cores extending in a radial fashion and a plurality of stator coils each of which is wound around each of said stator cores;said motor chassis comprises an attaching element having an inverted L shape extending upward from its one end to be brought into contact with said back surface of said chassis; andsaid back surface of said chassis being covered with a lower cover made of metal and having a U-shaped portion with side walls formed on each side thereof, said lower cover being coupled to said chassis with its side walls fitted to outer surfaces of said side walls of said chassis, said lower cover being screwed to said chassis at two positions on both sides in an intermediate portion in a longitudinal direction, said disk drive further comprising an anti-wobbling mechanism for suppressing wobbling motion of said lower cover, and said anti-wobbling mechanism being formed on said both side walls of said lower cover and said chassis in the vicinity of longitudinal opposite ends of said lower cover and said chassis.