Flexible disk drive having a frame structure comprising a main frame and a sub-frame of a lower cover

摘要

A main frame has a size where only high precision parts are mounted thereon and has structure where a front portion of a frame is deleted. A lower cover, which covers a lower surface of the main frame, has a function as a sub-frame mounting low precision parts corresponding to the front portion of the deleted frame, thereby playing a role as one frame by a combination of the main frame and the sub-frame of the lower cover.