Spindle Motor and Recording Disk Driving Apparatus Having the Spindle Motor
AssigneeNidec Corporation
InventorsShigeharu Sumi, Takeshi Ohiro
Life of this patent
Estimating the term…
Abstract
Spindle motor capable of positively fixing and securing conduction between a housing and a bracket, and a recording disk driving apparatus using the spindle motor. The bracket has a circular through hole, and the housing is fixedly inserted in the circular through hole. A protrusion is formed on at least one of the bracket and the housing. A conductive member is between and in contact with a flange and the bracket or the housing in the direction of the rotary axis to electrically connect the flange and the bracket or the housing. The conductive member is in contact with the flange and the bracket or the housing under an elastic stress.
Claims19
A spindle motor wherein a shaft and a sleeve rotate relatively to each other around a rotary axis, the motor comprising:
- a bracket having a circular through hole extending in the axial direction of the rotary axis;
- a housing having a cylindrical portion inserted into the circular through hole;
- a cylindrical sleeve fitted on the inner peripheral surface of the housing;
- a shaft inserted at least along a part of the inner peripheral surface of the sleeve;
- a fluid dynamic bearing formed at least between the outer peripheral surface of the shaft and the inner peripheral surface of the sleeve;
- a protrusion outward or inward of an inner wall of the insert portion of the circular through hole on at least one of the bracket and the housing;
- and
- a conductive member arranged in contact in the axial direction of the rotary axis at least between the protrusion and one of the bracket or the housing, thereby electrically connecting between the protrusion and one of the bracket or the housing;
- wherein
- the conductive member is in contact under the elastic stress applied thereto.
Dependencies are inferred from the claim text.