| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize thin-shaping, improvement of rotational accuracy such as a run-out of a rotor, prevention of oil flowing-out, and increasing of durability and reliability at the same time. <P>SOLUTION: In the spindle motor equipped with a bearing of a full-fill structure, a taper seal part is radially arranged in parallel with a radial bearing part, and a dynamic seal part is provided between the bearing part and the tape seal part using a spiral groove. This makes it possible to thin-shape the spindle motor and the disk drive equipped with the motor without sacrificing the volume of the taper seal part, the bearing rigidity of the radial bearing part, the tightening strength of a shaft and the rotor, and run-out accuracy of the rotor. Application to higher rotational speed can be realized because the dynamic seal part functions against a centrifugal force. <P>COPYRIGHT: (C)2003,JPO |
