Speaker having improved sound-radiating function to both directions
US7570774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2005 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | Aug 11, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/063
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A speaker having an improved sound-radiating function to both directions is provided. The speaker includes a magnetic circuit unit, a voice coil, and an auxiliary vibrating plate and a primary vibrating plate sequentially arranged from a forward direction. The voice coil vibrates toward a backward direction and a forward direction due to interaction with the magnetic circuit unit. The auxiliary vibrating plate is cone-shaped and has a damping function. The primary vibrating plate is also cone-shaped. Central necks of the primary vibrating plate and the auxiliary vibrating plate are fixed on the voice coil, respectively. The auxiliary vibrating plate is enlarged toward a forward direction and the primary vibrating plate is enlarged toward a backward direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.