| 摘要 |
<p>A dynamic pressure type fluid bearing device used for a disk driving spindle motor, wherein bearings are formed so that the number of parts is reduced remarkably and a leakage of bearing oil can be prevented effectively, all the dynamic pressure generating grooves for thrust bearings and radial bearings are formed in one part on either of a sleeve side (3) or a shaft side (1), a shaft (1), a second seal plate (9), a motor hub (11), and a seal cover are formed integrally with each other, a plurality of seals are formed continuously, and a spiral groove is provided in at least one surface of those surfaces which form the seals.</p> |
