Nested compound loudspeaker drive unit
US8660279B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 2008 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Dec 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R7/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker driver (22) also suitable for compound applications comprising a rigid speaker frame (11, 13, 15, 19, 8) to which is attached a permanent magnet (13) with which a voice coil winding (9) is adapted to interact through electromagnetic force. The voice coil winding (9) is adapted to deliver axial motion to a diaphragm assembly (21), which includes an elastic outer section (2), whose outer rim (5) is attached to the outer part of the speaker frame (11). The diaphragm assembly (21) comprises an essentially rigid primary vibrating diaphragm (4) attached between the elastic outer section (2) and an elastic inner section (3), whose inner rim (10) is attached to the inner part of said speaker frame (8). Said voice coil winding (9) is fixed to the primary vibrating diaphragm (4) through said voice coil former (6), which is adapted to move said diaphragm assembly (21).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.