| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydrodynamic bearing device stably exercising its performance for a long period by unifying the fixing force of a thrust supporting member and preventing troubles such as the leakage of lubricating fluid. SOLUTION: A projecting part 1a for radially positioning the thrust supporting member 2 is formed on at least one of an inner peripheral face 1y of a sleeve 1 and an outer peripheral face 2y of the thrust supporting member 2. By applying this constitution, the thrust supporting member 2 is positioned at the approximately radial center of a circumferential step part, and the outer peripheral face 2y of the thrust supporting member and the inner peripheral face 1y of the circumferential step part are prevented from being excessively kept into contact with or partially close to each other. Whereby a radial clearance necessary for filling an adhesive 10 (that is, a thickness of an adhesive layer) can be uniformly secured around the entire circumference in the circumferential direction, and the desired fixing force of the thrust supporting member 2 can be stably reproduced. COPYRIGHT: (C)2004,JPO
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