Disk drive voice coil motor yoke assembly having proximity latch magnet pair attracting and holding voice coil bias steel therebetween
US7369367B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2004 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Jul 23, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention includes a yoke assembly containing a top and a bottom proximity latch magnet. The invention includes a voice coil attached to a voice coil bias steel. The crash stop includes a magnetic proximity latch created by the voice coil bias steel attracted to the top and bottom proximity latch magnets. It may also include using the magnetic proximity latch with a magnetically weakened contact latch. Experiments have shown that the combined magnetic proximity latch and the magnetically weakened contact latch require significantly less initial releasing force than the prior art crash stops, and meet rotary shock requirements. The invention includes making the actuator assembly, the voice coil motor assembly, and the CSS hard disk drive. The invention includes operating the CSS hard disk drive with at least the magnetic proximity latch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.