Sound-producing apparatus, acoustic module provided with sound-producing apparatus, and electronic device
US12192731B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2019 |
| Grant date | Jan 7, 2025 |
| Priority date | — |
| Expiry date | Dec 8, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2209/022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a sound-producing apparatus, including a vibration assembly and a magnetic circuit assembly, the vibration assembly includes a diaphragm which vibrates to generate sound waves, wherein, a middle region of the magnetic circuit assembly is hollowed out to form a volume expansion cavity penetrating through the magnetic circuit assembly, with a flexible deformation portion being provided in a region of the magnetic circuit assembly located in the volume expansion cavity; the flexible deformation portion covers a port of the volume expansion cavity or separates the volume expansion cavity into two regions that are isolated from each other; the flexible deformation portion is disposed facing the diaphragm, and can vibrate as a function of air pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.