Voice coil motor and disk drive unit with the same
US7990658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2007 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Feb 24, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5569
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A voice coil motor for a disk drive includes a permanent magnet, a voice coil adapted to move in an arc proximate to the permanent magnet, a top plate positioned above the voice coil, and a bottom plate positioned below the voice coil. The permanent magnet has two halves that are magnetized in opposite direction. The two halves of the magnet are split into a right half magnet portion and a left half magnet portion. The right half magnet portion and the left half magnet portion are attached to the top plate and the bottom plate respectively at opposite sides of the voice coil motor. The invention also discloses a disk drive unit with such VCM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.