Micro-speaker
US9049506B2 · kind B2 · utility
1Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2013 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Jun 19, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A micro-speaker includes a yoke, a magnet assembly attached to the yoke, a voice coil, and a diaphragm connected with the voice coil. The yoke defines a bottom wall, and a number of sidewalls extending upwards from the bottom wall. The magnet assembly includes a main magnet positioned on the bottom wall, and a number of secondary magnets positioned on tops of the sidewalls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.