Speaker
US7209570B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2002 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Feb 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high efficiency loudspeaker without a damper is provided. The loudspeaker includes magnetic circuit having a magnetic gap and a voice coil member, which has movable coil, disposed in the magnetic gap of the magnetic circuit. The loudspeaker also includes a diaphragm, whose inner peripheral part is linked with the voice coil member, outside the magnetic gap and a frame linked with an outer peripheral part of the diaphragm via a first edge. An inner peripheral part of a suspension holder is linked with the voice coil member at a linked position which is closer to the magnetic circuit than a linked position of the diaphragm and the voice coil member. An outer peripheral part of the suspension holder is linked with a frame via a second edge. The first edge and the second edge are substantially symmetrical with each other about a median of a first edge and a second edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.