Voice coil and speaker
US8165336B2 · kind B2 · utility
7Cited by
14References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2009 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Oct 12, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2209/022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A voice coil includes a cylindrical bobbin formed of a first material; a coil which surrounds on an outer circumferential surface of the bobbin; and a plurality of reinforcement members formed of a material having a propagation speed faster than the first material and provided on the outer circumferential surface of the cylindrical bobbin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.