JPS61197800U

JPS61197800U -

Info

Publication number: JPS61197800U
Application number: JP8016985U
Authority: JP
Priority date: 1985-05-30
Filing date: 1985-05-30
Publication date: 1986-12-10
Anticipated expiration: 2000-05-30
Also published as: JPH0715279Y2

Description

[Brief explanation of the drawing]

第１図は従来のコンデンサマイクロホンの断面
図、第２図ａ，ｂはスペースリングと背極板及び
内ケースを一体化構造にした本考案のコンデンサ
マイクロホンの断面図とその一部拡大図、第３図
は第２図の実施例に用いる背極体の断面図、第４
図は第２図の実施例に用いる回路基板の平面図、
第５図は背極体と金属ケース間に絶縁層１４を設
けた本考案の他の実施例の断面図である。１，９……エレクトレツトされた振動膜、２，
１０……金属のリング、３……スペースリング、
３―１……コンデンサ、４……背極板、４ａ……
穴、５……内ケース、５―１……背気室、６，１
２……インピーダンス変換器、６―１，６―２，
６―３，１２―１，１２―２，１２―３……端子
、７，１３……回路基板、８，１４……金属ケー
ス、９ａ……導電体膜、９ｂ……絶縁体膜、１１
……背極体、１１ａ……穴、１１―１……ギヤツ
プ、７ａ，１３ａ，１３ｂ……導電パターン、１
５……絶縁層。 Figure 1 is a cross-sectional view of a conventional condenser microphone, Figures 2a and b are cross-sectional views and partially enlarged views of the condenser microphone of the present invention, which has an integrated structure of a space ring, a back plate, and an inner case. Figure 3 is a cross-sectional view of the back electrode body used in the embodiment shown in Figure 2;
The figure is a plan view of the circuit board used in the embodiment of FIG.
FIG. 5 is a sectional view of another embodiment of the present invention in which an insulating layer 14 is provided between the back electrode body and the metal case. 1,9...electretted vibrating membrane, 2,
10...Metal ring, 3...Space ring,
3-1... Capacitor, 4... Back plate, 4a...
Hole, 5... Inner case, 5-1... Back air chamber, 6,1
2... Impedance converter, 6-1, 6-2,
6-3, 12-1, 12-2, 12-3... terminal, 7, 13... circuit board, 8, 14... metal case, 9a... conductor film, 9b... insulator film, 11
... Back electrode body, 11a ... Hole, 11-1 ... Gap, 7a, 13a, 13b ... Conductive pattern, 1
5...Insulating layer.

Claims

[Scope of utility model registration request]

A back air chamber is formed using a cylindrical body, a circuit board mounted with an impedance converter and placed on one side of the cylindrical body, and a diaphragm placed on the other end side of the cylindrical body via a spacer. In the condenser microphone, a conductive member is disposed in the back air chamber in the vicinity of the diaphragm and forms a gap between the diaphragm and the diaphragm, which serves as a capacitor. 1. A structure of a condenser microphone, characterized in that a diaphragm made of an electret by coating a membrane is used, and the cylindrical body, the conductive member, and the spacer are integrally formed of a metal material.