Electroacoustic transducer with springs forming electrical interconnections as a result of assembly
US4046974A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1976 |
| Grant date | Sep 6, 1977 |
| Priority date | — |
| Expiry date | Oct 1, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electroacoustic transducer in accordance with the present invention comprises a perforated backplate having a plurality of upstanding parallel ribs between which conductive surfaces are situated. The conductive surfaces are electrically interconnected with one another and with a contact surface on a relieved shoulder at one end of the backplate. This shoulder is engaged by a bifurcated contact spring that (1) electrically connects the conductive surfaces to the input of an integrated preamplifier circuit deposited on a substrate and (2) holds the substrate in place on the underside of the backplate. An electret diaphragm having a metallized surface is tensioned across the ribs of the backplate with the metallized surface facing away from the backplate, and while so tensioned, the ends of the diaphragm are clamped against the backplate by a conductive intermediate member that makes electrical contact with the diaphragm. The intermediate member is held in place by a conductive spring member that wraps around the sides of the foregoing assembly and presses the intermediate member and the substrate toward one another. The spring member provides the clamping force necessary to retain…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.