Sound device
US10979819B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2019 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Nov 25, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a sound device, which includes a magnetic circuit system, wherein the magnetic circuit system includes a bottom plate, a first magnetic portion arranged on the bottom plate and a second magnetic portion spaced apart from the first magnetic portion, at least one of the first magnetic portion and the second magnetic portion is a permanent magnet, the bottom plate is provided with a through hole penetrating through the bottom plate, the sound device further includes a damping member, the damping member is fixed on the bottom plate and completely covers the through hole, and the permanent magnet is at least partially abutted against the damping member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.