Speaker
US11678107B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2021 |
| Grant date | Jun 13, 2023 |
| Priority date | — |
| Expiry date | Jan 5, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a speaker including a frame, a vibration system, and a magnetic circuit system, wherein the vibration system includes a first vibration diaphragm and a second vibration diaphragm which are fixed to two opposite sides of the frame, the magnetic circuit system includes a bobbin, a magnet fixed in the bobbin and spaced from an inner wall of the bobbin, a first pole plate fixed on one side of the magnet close to the first vibration diaphragm, a second pole plate fixed to one side of the magnet close to the second vibration diaphragm, and a third pole plate fixed outside the bobbin and spaced from an outer wall of the bobbin. The first voice coil assembly and the second voice coil assembly move inside and outside in a staggered manner, which saves a Z-directional space of the speaker and achieves higher magnetic field efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.