Patent ID: 6031686
Filing Date: 2000-02-29
Classification: G11B

Abstract:
A disk drive for carrying out data writing/reading operations onto and from a flexible magnetic disk and a magnetooptic disk, said disk drive comprising:a frame plate structure having a principal upper surface on which a receiving portion for receiving a disk and a recording/reproducing unit for carrying out recording/reproducing operations onto and from said disk are provided;wherein said frame plate structure comprises:a thin metal plate having a thickness of about 0.8 mm and a rear or lower surface;a thin reinforcing plate substantially equal in length and width to said frame plate structure, said thin reinforcing plate having a thickness of about 0.4 mm and being adhered to said rear or lower surface of said thin metal plate by use of an adhesive; anda reinforcing bead formed on said principle upper surface of said frame plate structure to increase the strength of said frame plate structure;wherein a printed wiring board is mounted on said principal upper surface or the rear surface of said frame plate structure;wherein said printed wiring board includes a signal processing circuit comprising a plurality of electronic components for said recording/reproducing unit, a motor for rotating said disk, and a drive circuit for driving said motor;wherein said thin metal plate is provided with at least one first opening to enable access to at least one of said electronic components from a side of the rear surface of said frame plate structure for the purpose of electric adjustment, and a second opening for holding a bearing portion of said motor; andwherein said thin reinforcing plate is provided with openings formed at positions corresponding to said at least one first opening and said second opening of said thin metal plate.