Speaker
US9591407B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2015 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Aug 21, 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, includes a frame having an elongated axis; a vibration unit accommodated in the frame, the vibration unit comprising a magnet assembly, the vibration unit further including a passage; a spring elastically deformable along the elongated axis and elastically suspending the magnet assembly in the frame; a guiding pole sleeved by the spring and at least partially passing through the passage for providing a guidance to the vibration unit; a voice coil fixed relative to the frame and surrounding the magnet assembly; a diaphragm driven by the vibration unit for radiating sounds. 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.