Loud speaker, diaphragm and process for making the diaphragm
US6757404B2 · kind B2 · utility
20Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2001 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | May 2, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2307/029
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diaphragm is gained by the co-molded of a dome part, a voice coil junction part, a cone part and a peripheral part through the injection mold of thermoplastic resin. The thickness of the central part of the dome is made great so that the resonance amplitude in this part becomes small. In addition, an annular rib is integrally provided to the voice coil junction part so as to increase the junction strength between the diaphragm and the voice coil bobbin. Thus, the electromagnetic driving force of the voice coil can be effectively transmitted to the diaphragm so that a loud speaker with excellent characteristics can be gained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.