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Spindle motor and disk device provided with the same

A spindle motor, rotating shaft technology, applied in the direction of configuration/installation of electromechanical devices, electric components, recording heads, etc., can solve the problems of exposure of magnetic circuit components, blocking magnetic leakage, loss of recorded data, etc.

Inactive Publication Date: 2008-06-04
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if this is done, the magnetic circuit components are exposed to the inside of the disk device
In this case, the conventional shielding plate configured to cover the upper surface of the stator cannot easily completely block the flux leakage from the magnetic circuit
If the magnetic flux leakage is only insufficiently blocked, failures such as loss of recorded data in the disk may occur

Method used

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  • Spindle motor and disk device provided with the same
  • Spindle motor and disk device provided with the same
  • Spindle motor and disk device provided with the same

Examples

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Embodiment Construction

[0021] A first embodiment in which the disk device of the present invention is applied to a hard disk drive (HDD) will now be described in detail with reference to the accompanying drawings.

[0022] Figure 1 shows the internal structure of an HDD with the top cover removed. As shown in FIG. 1 , the HDD has a housing 10 . The housing 10 comprises: a base 11 in the form of a rectangular box open at the top; and a top cover (not shown) in the form of a rectangular plate. Secure the top cover to the base with screws to close the top opening of the base. Therefore, the inside of the housing 10 is kept airtight, and ventilation to the outside can be achieved only through the breathing filter 26 . The base 11 and the top cover are made of, for example, aluminum or steel.

[0023] A magnetic disk 12 , a spindle motor 13 , magnetic heads 33 (for example, two in number), a head actuator 14 , and a voice coil motor (VCM) 16 are arranged on the base 11 . The spindle motor 13 supports...

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Abstract

A disk device includes a recording medium, a spindle motor which supports and rotates the recording medium, a head, and a head actuator which supports the head for movement. The spindle motor includes a rotor, a fluid bearing which supports the rotor for rotation, a cylindrical magnet coaxially fixed to the rotor, an annular stator located outside the rotor in the circumferential direction, and a magnetic shielding member which blocks leakage flux from a magnetic circuit. The magnetic shielding member has an annular portion which extends at right angles to an axis of rotation of the rotor and covers an upper surface portion of the stator, and a cylindrical portion which extends along the axis of rotation of the rotor and radially faces the whole outer peripheral surface of the rotor except a region where the stator and the magnet face each other.

Description

technical field [0001] The present invention relates to a spindle motor and a disk device having the spindle motor and a disk serving as a recording medium. Background technique [0002] In recent years, disk devices such as magnetic disk devices, optical disk devices, and the like have been widely used as external recording devices for computers or image or music recording / reproducing apparatuses. [0003] A disk device such as a magnetic disk device generally includes a magnetic disk, a spindle motor, a head actuator, a voice coil motor, a circuit board unit, and the like. A magnetic disk is arranged in the housing. The spindle motor supports and rotates the disk. The head actuator supports the magnetic head. A voice coil motor is used to drive the actuator. The head actuator has a bearing portion and an arm laminated on and extending from the bearing portion. The magnetic heads are mounted on the respective arms by means of suspensions. [0004] In general, an inner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/00H02K5/22H02K7/08H02K1/12H02K1/27G11B19/20G11B5/48
CPCH02K11/0005H02K11/0141
Inventor 北村宽之
Owner KK TOSHIBA
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