Speaker
US12052549B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2022 |
| Grant date | Jul 30, 2024 |
| Priority date | — |
| Expiry date | Aug 31, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A speaker includes a yoke configured to form a magnetic circuit, a first magnet provided in a fixed manner, a voice coil provided in a gap through which a magnetic flux of the magnetic circuit is configured to pass, a diaphragm connected to the voice coil and configured to vibrate with the voice coil, a second magnet provided on a diaphragm unit including the voice coil and the diaphragm, and a magnetic sensor provided at a position through which both of a first magnetic flux generated by the first magnet and a second magnetic flux generated by the second magnet are configured to pass, wherein a direction of the first magnetic flux and a direction of the second magnetic flux are different from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.