| 摘要 |
PURPOSE: A spindle motor which is miniaturized according to design freedom is provided to increase the property of bearing and to make a hub be thick. CONSTITUTION: A cup plate(140) is combined between a rotation shaft and a hub. The cup plate is combined to support a part of a sleeve. A sealing member support a part of the cup plate to support the sleeve. The sealing member prevents leak of working fluid. An oil interface of the rotation shaft is formed in the working fluid.
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