Speaker
US11457317B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2018 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Oct 13, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2307/025
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A speaker is disclosed, which comprises a vibration system and a magnetic circuit system cooperating with the vibration system. The vibration system includes a speaker diaphragm, the speaker diaphragm comprises two surface layers compounded together and at least one intermediate layer positioned between the two surface layers, at least one of the surface layers is a thermoplastic polyester elastomer film layer, the at least one intermediate layer is an adhesive layer, the speaker diaphragm has Young's modulus of 5-700 MPa and an amplitude of 0.25 mm-1 mm, and the speaker has F0 of 150-1500 Hz. The speaker has a good sounding effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.