Electroacoustic transducing device
US8155374B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2009 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Jun 23, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electroacoustic transducing device comprising: a magnetic circuit having a yoke, a magnet, and a pole piece; a vibration system having a diaphragm and a voice coil; and a frame which holds the magnetic circuit and the vibration system. The voice coil is placed in a magnetic gap, and has lead wires of the voice coil which are drawn out from the voice coil at positions which are remote from the diaphragm. Openings for air forming for forming slack portions in the lead wires are drawn out from the voice coil and are disposed in the frame. The lead wires are adequately subjected to the wire laying process, and the audio performance is prevented from being lowered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.