Managing resonance frequency of hard disk drive voice coil motor
US8958179B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2014 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Jan 7, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/48
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Approaches to reducing the natural frequency of a voice coil motor (VCM) in a hard disk drive include configuring one or both of the yokes with at least one mating structure that comprises a step feature that partitions the mating structure into a contact surface and a recessed surface, where the contact surface is toward the outer area of the mating structure and contacts a corresponding mating structure of the other yoke and the recessed surface is toward the inner area of the mating structure and does not contact with the corresponding mating structure of the other yoke. Consequently, the distance between the fixed points is increased, which reduces the natural frequency and thus the resonance of the VCM assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.