Electromagnetic speaker
US9621993B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2015 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Aug 17, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides an electromagnetic speaker including a frame having an elongated axis, a magnet assembly received in the frame, an elastic plate perpendicular to the elongated axis for suspending the magnet assembly in the frame, a voice coil surrounding and keeping a distance from the magnet assembly, and a diaphragm driven by the magnet assembly. When the electromagnetic speaker is mounted in a mobile phone, the diaphragm vibrates along a direction parallel to the screen, and the amplitude thereof will not be affected by the height of the mobile phone. In addition, the amplitude of the diaphragm at low frequency is greater than a normal speaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.