To provide a bearing mechanism for eliminating lubricating oil, for generating sufficient radial dynamic pressure even in a relatively low speed region, and facilitating surface working for generating radial dynamic pressure, and being manufactured inexpensively.
Dispersive fine irregularities are dispersively formed and surface- roughened on at least one side (hereinafter referred to as a roughened surface) of the outer peripheral surface 2a of a first member 2 and the inner peripheral surface 3a of a second member 3 facing with a bearing gap G there between, to adjust the center line mean roughness in a range of 0.1 μm-1.0 μm. Since the sufficient radial dynamic pressure can be generated by relatively low rotation speed according to this constitution, time in a dynamic pressure shortage condition can be shortened at the time of the start or stop of a rotation mechanism, to make member wear hard unoccur in a bearing part.
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| JPH0720709 | [Title of Invention] Information Recording Device |
YATAZAWA JUN
HISADA TAKEO
KATO MAKIO
