Diaphragm, loudspeaker using diaphragm, electronic device and mobile device using loudspeaker, and method for producing diaphragm
US9438997B2 · kind B2 · utility
3Cited by
0References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2013 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Nov 29, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diaphragm includes a paper layer and a skin layer. The paper layer includes natural fibers and synthetic fibers formed of thermoplastic resin. The paper layer is formed by mixing the natural fibers and the synthetic fibers in water, and thinly spreading a resultant mixture on a mesh. The skin layer is formed on one surface of the paper layer. Note here that the skin layer is formed of the same resin as that of the synthetic fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.