Speaker
US7574013B2 · kind B2 · utility
6Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2005 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Sep 6, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The speaker has a frame, a magnetic circuit, a voice coil body and a diaphragm. The magnetic circuit is disposed inside of the frame to form a magnetic gap. The voice coil body is disposed movably in the magnetic gap. The diaphragm is coupled to the voice coil body by an inner periphery edge thereof and to the frame by an outer periphery edge thereof. The outer peripheral surface of a convex portion provided on a bottom of the frame is at least either being brought into contact with or in proximity to the magnetic circuit. The configuration can provide the speaker with excellent heat dissipation characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.