Sound converter
US10728672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2018 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Sep 20, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R31/003
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound converter includes a rectangular frame, a first suspension seated on an upper side of the frame to vibrate, a second suspension attached to a bottom surface of the first suspension and electrically connected to a voice coil to vibrate, a magnetic circuit including a center magnet, a plurality of sub-magnets spaced apart from the center magnet by a certain distance to define a magnetic gap, a plurality of top plates positioned above the center magnet and each sub-magnet, and a bottom plate positioned below the center magnet and each sub-magnet, and a third suspension connecting a lower end or a lower end lateral surface of the voice coil to the frame to vibrate. The voice coil is attached to a bottom surface of the second suspension. The third suspension is positioned through spaces defined by the sub-magnets being spaced apart from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.