Speaker
US11172307B2 · kind B2 · utility
0Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2020 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Aug 24, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2307/207
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
One or more holes are formed in a first diaphragm. A second diaphragm is arranged on a sound emitting side of the first diaphragm. A driver includes a magnetic circuit and a voice coil, and vibrates the first and second diaphragms. The second diaphragm includes a rigidity-reinforcing portion in which a rigidity of the second diaphragm is reinforced at a position facing at least one hole of the one or more holes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.