Speaker unit and earphone
US12108202B2 · kind B2 · utility
0Cited by
0References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2021 |
| Grant date | Oct 1, 2024 |
| Priority date | — |
| Expiry date | Jul 16, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A speaker unit incorporated in a housing of an earphone includes: a frame having a cylindrical shape; a diaphragm emitting sound; and a board to which a wiring line of a coil provided to the diaphragm is connected. The frame has a space inside, and the diaphragm and the board are placed inside the frame with the space interposed between the diaphragm and the board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.