Speaker
US11140489B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2019 |
| Grant date | Oct 5, 2021 |
| Priority date | — |
| Expiry date | May 5, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2209/041
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A speaker includes a frame; a magnetic circuit system in the frame; and a vibrating system in the frame. The vibrating system includes a suspension ring fixed on the frame, a number of domes fixed at a center of the suspension ring and a voice coil connected below the domes. The domes includes a first dome and a second dome stacked with each other. The second dome has a body part and a number of convex parts extending from the body part to the magnetic circuit system; a number of intervals each formed between every two contiguous convex parts. The convex part includes a bottom surface close to the magnetic circuit system. The voice coil buts the bottom surface and forms leakage passages with the second dome at the interval positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.