Diaphragm for miniature sound generating device and miniature sound generating device
US12312428B2 · kind B2 · utility
0Cited by
9References
10Claims
0Family size
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Key dates
| Filing date | Apr 20, 2020 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Aug 11, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A diaphragm for a miniature sound generating device, wherein the diaphragm is made of a polyacrylate copolymer, a plasticizer is mixed in the polyacrylate copolymer, the polyacrylate copolymer is 100 parts by mass, and the plasticizer comprises at least one of aliphatic dibasic acid esters, phthalic acid esters, benzene polyacid esters, benzoic ethers, polyol esters, chlorinated hydrocarbons, epoxides, citrate esters and polyesters. The diaphragm possesses excellent sound performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.