Electroacoustic converter
US4799266A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1987 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Nov 25, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electroacoustic converter comprising a magnetic circuit including a center pole, a magnet and a top plate with an upper side surface of the center pole being space from an adjacent side of the top plate. The top plate includes an incision on a horizontal rear surface thereof and a horizontal part adjacent to the incision. A diaphragm system is provided over the top of the center pole and includes a dome-like diaphragm, a cylinderical bobbin on which a voice coil is wound, and a brim-like suspension which extends outwardly from the bobbin. A guide ring is bridged between a ledge on a vertical surface of the center pole and the incision of the top plate. The periphery of the suspension of the diaphragm system is fixedly sandwiched between the horizontal part of the guide ring and the horizontal surface of the top plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.