Electromagnetic transducer
US9071909B2 · kind B2 · utility
0Cited by
2References
11Claims
0Family size
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Inventors
Key dates
| Filing date | Dec 14, 2011 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Apr 3, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multifunctional electromagnetic transducer includes a bracket, a vibrating unit including a magnetic circuit part receiving in the bracket, and a plurality of helical wound springs assembled to the bracket for sustaining the magnetic circuit part. The magnetic circuit part defines a pole plate, a first magnet disposed at a center portion of the pole plate, and a plurality of second magnets surrounding the first magnet and forming a magnetic gap corporately with the first magnet. Each of the second magnets forms a receiving gap corporately with an adjacent second magnet. A voice coil is partially inserted into the magnetic gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.