Miniature sounder
US9936302B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2017 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Jan 26, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R7/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Some embodiments of the present invention provide miniature sounder which includes a frame and a vibration system and a magnetic path system fixedly connected to the frame. The magnetic path system includes a lower clamping board, a primary magnet disposed on the lower clamping board, secondary magnets disposed on the lower clamping board and arranged around the primary magnet, and a cushion provided on the lower clamping board and located outside the secondary magnets, a gap being provided between two adjacent secondary magnets. The vibration system includes a voice diaphragm, a voice coil which drives the voice diaphragm to vibrate and generate a sound, and a vibrating diaphragm which elastically supports the voice coil. The vibrating diaphragm includes a first connecting portion connected to the voice coil, a second connecting portion connected to the cushion, and a corrugated rim connecting the first connecting portion and the second connecting portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.