Miniature sound generator
US9813821B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2016 |
| Grant date | Nov 7, 2017 |
| Priority date | — |
| Expiry date | Nov 17, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R31/006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A miniature sound generator includes a vibration system including a diaphragm, a voice coil, a damping part supporting the coil elastically, and a fixing system. The voice coil is located below the diaphragm for driving the diaphragm to vibrate and includes a pair of long shaft sides and a pair of short shaft sides. The damping part includes a circuit board arranged on one short shaft side for electrically connecting with the voice coil, and an insulated symmetrical plate arranged on the other short shaft side. The damping part is only arranged at the short shaft sides symmetrically, with one end thereof being fixed with the fixing system, and the other end thereof being fixed with the voice coil. The insulated symmetrical plate has a damping coefficient same to that of the circuit board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.