Speaker
US11006222B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2019 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Dec 4, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure discloses a speaker, including a holder, a magnetic circuit unit and a vibration unit arranged in the holder, the vibration unit comprises a suspension fixed at the holder, a dome fixed at a center of the suspension and a voice coil connected to the dome, the dome is provided with recesses formed by recessing from the dome towards the magnetic circuit unit, a spacing is formed between at least two of the recesses, and the voice coil abuts against bottom walls of the recesses and forms a leakage passage with the dome at the spacing. The leakage passage enables a difference of internal and external air pressures of the voice coil to be effectively reduced after an amplitude of the vibration unit is increased; the voice coil becomes short and thick, and thus a magnetic flux is increased and structural strength of the dome itself is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.