Bone-conduction transducer and bone-conduction speaker headset therewith
US6668065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Oct 17, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a bone-conduction transducer comprising a plate-shaped yoke bent to form a pair of cut portions at both ends thereof; voice coils fitted to a center extension of the cut portions; a magnet and a plate of rectangular parallelepiped shape disposed between the voice coils; and a diaphragm minutely spaced from a lower part of the plate. The present invention constructed as above has an advantage of optimizing the bone-conduction transducer by fitting the voice coils to both the center extensions of the yoke to convert electrical signals into magnetic attractive and repulsive forces, and arranging the magnet and the plate between the voice coils. Further, the present invention has yet another advantage of enhancing the output efficiency, minimizing noise, and drastically reducing distortion, by improving functions of a base supporting the diaphragm as well as the diaphragms (made of a very low magnetic resistance material), whose weight is drastically reduced as compared to conventional diaphragms, in a manner of vibrating the diaphragm by virtue of the voice coils and the magnetic attractive and repulsive forces created according to variations in the current applied to the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.