Patent ID: 6243230
Filing Date: 2001-06-05
Classification: F16C,G11B,H02K

Abstract:
A disk drive unit comprising:a rotary member having a spindle;an information-recording disk being fixedly mounted on said rotary member;a bearing unit rotatable supporting said spindle, the bearing unit including:a radial bearing device provided in opposed relation to an outer peripheral surface of said spindle, the radial bearing device having a concentric arc-shaped bearing surface that is concentric with said circular outer periphery of said spindle, and a non-concentric arc-shaped bearing surface that is non-concentric with said circular outer periphery of said spindle; anda thrust bearing device provided in opposed relation to a distal end surface of said spindle;a motor for imparting a rotational force to said spindle; anda lubricating fluid filled in said bearing unit;wherein said distal end surface of said spindle is formed into a flat surface, and said thrust bearing device has a flat surface which is smaller in diameter than said spindle, and is held in opposed relationship with said flat distal end surface of said spindle.