Disk apparatus having a narrow magnetic gap
US7468867B2 · kind B2 · utility
0Cited by
10References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 29, 2005 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | Jan 19, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/553
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An HDD has a carriage which moves a head with respect to a medium, and a voice coil motor (VCM) which drives the carriage. The VCM has a magnet, between which and a first shell formed of a magnetic substance a magnetic circuit is formed, and a voice coil which is secured to the carriage and disposed in a magnetic gap. A depression which receives a projecting portion covering a lead of the voice coil is formed in the first shell, and thereby a projection projecting toward the coil is consequently formed. This structure partially narrows the magnetic gap and allows generation of a torque with sufficient intensity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.