Spindle motor and disc driving device

A spindle motor and axial technology, applied in the direction of electromechanical devices, electric components, synchronous motors with stationary armatures and rotating magnets, etc., can solve the problem of bending of magnetic components, cost increase of spindle motors, and edge displacement of magnetic components Positioning and other problems, to achieve the effect of suppressing the increase in the number of parts
CN102088232BInactive Publication Date: 2013-04-24NIDEC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NIDEC CORP
Publication Date
2013-04-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a spindle motor and a disc driving device, wherein the spindle motor comprises a magnetic part fixed on a base and axially facing towards a magnet at an interval, and an insulating sheet arranged between the base and a coil to electrically ensure electrical insulation between the base and the coil. The insulating sheet has a cover part for covering upper surface of the radical edge of the magnetic part.
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Description

technical field

[0001] The present invention relates to a spindle motor and a disk drive. Background technique

[0002] A spindle motor that rotates a disk around its central axis is installed in a hard disk drive or an optical disk drive. The spindle motor has a stationary part fixed to the device case and a rotating part supporting and rotating the disk. The spindle motor generates torque around a central axis by using magnetic flux generated between the stationary part and the rotating part, thereby rotating the rotating part relative to the stationary part.

[0003] Some of the conventional spindle motors have a magnetic member for attracting the rotating part toward the stationary part. The magnetic member is fixed to the stationary portion, and an axial magnetic attraction force is generated between the magnetic member and the magnet on the rotating portion side. For example, Japanese Patent Application Laid-Open No. 2001-309605 describes a magnetic ring that is att...

Claims

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