Vibration-sound generating device and yoke thereof
US7778436B2 · kind B2 · utility
2Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2006 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Jun 8, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vibration-sound generating device and yoke thereof are described. The vibration-sound generating device comprises a diaphragm, a vibration part comprising a magnet and a yoke, which is positioned apart from the diaphragm by a desired distance, a suspension elastically supporting the vibration part, a supporting part supporting the diaphragm and the suspension, and a voice coil electromagnetically driving the diaphragm and the vibration part. The yoke of the invention has higher specific gravity and magnetic permeability than iron. So that it can improve performance of vibration and sound device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.