Transducer motor structure and inside-only voice coil for use in loudspeakers
US8542865B2 · kind B2 · utility
2Cited by
1References
6Claims
0Family size
Inventor
Key dates
| Filing date | Mar 10, 2008 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Jul 19, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49073
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electromechanical transducer 180, motor structure 200 and voice coil winding support structure or bobbin 210 are configured to protect and transport heat away from a voice coil 220 which is would solely within the interior of bobbin 210 and configured for reciprocating movement in close proximity to an extended cooling pole piece 204. A compact, economical and efficient adaptation of a pancake style motor includes generous volume for a powerful magnet 208, while providing an extended, linear range of excursion and continuous cooling for the generously overhung voice coil 220.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.