Loudspeaker
US7447328B2 · kind B2 · utility
2Cited by
21References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2004 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Dec 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2307/025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker includes a diaphragm, an edge, and a voice coil. The diaphragm includes a groove having a concave cross section. Also, the diaphragm is in a horizontally or vertically elongated shape. The edge is coupled to an outer circumference of the diaphragm, and has a roughly half-round shaped cross section. The voice coil is bonded to the groove. The voice coil is thicker than a depth of the groove. Also, the voice coil has a cross section in which a dimension in a direction along a plane of the diaphragm is longer than a dimension in a direction perpendicular to the plane of the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.