Loudspeaker having cooling system
US7272238B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2004 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Sep 19, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker has a cooling system in which a pole piece has a shorting ring made of non-magnetic conductive material that stabilizes magnetic field to reduce distortion of sound and a heat dissipation plate that couples to the shorting ring to facilitate efficient dissipation of heat. The heat generated by a voice coil of the loudspeaker is transmitted to the shorting ring and is conducted to the heat dissipation plate which acts as a heat sink to allow the heat dissipation. A multiplicity of shorting rings may be provided to further reduce impedance modulation, each of which is coupled to the heat dissipation plate. The heat dissipation plate has a gap in an axial direction of the loudspeaker to prevent an electric current in the shorting ring from flowing through the heat dissipation plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.