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

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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  • Spindle motor and disc driving device
  • Spindle motor and disc driving device
  • Spindle motor and disc driving device

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Experimental program
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Effect test

Embodiment Construction

[0024] Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. Hereinafter, the shape and positional relationship of each member will be described with the direction along the central axis as the vertical direction and the direction in which the substantially cup-shaped housing portion of the base member opens as the upward direction. However, this defines the up-and-down direction for convenience of description, and does not limit the postures of the spindle motor and the disk drive device in use according to the present invention.

[0025] figure 1 It is a partial longitudinal sectional view of the spindle motor 102 according to one embodiment of the present invention. Such as figure 1 As shown, the spindle motor 102 has a stationary part 103 and a rotating part 104 . The rotating part 104 is rotatably supported with respect to the stationary part 103 .

[0026] The rotating part 104 has a magnet 143 . On the other h...

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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.

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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Application Information

Patent Timeline
24 Apr 2013
Publication
CN102088232B
IPC
H02K21/12; H02K5/00; G11B19/20
Inventors
西村秀树; 关井洋一