Electret capacitance microphone and making method

Abstract

Herein disclosed is an electret condenser microphone which comprises a casing member having a center axis and including a circular acoustic inlet portion and a cylindrical side portion integrally formed with the acoustic inlet portion, the side portion of the casing member having a first section close to the acoustic inlet portion of the casing member and a second section remote from the acoustic inlet portion of the casing member, the second section of the side portion of the casing member radially inwardly bent toward the center axis of the casing member, a printed circuit board disposed in the casing member and held in contact with the second section of the side portion of the casing member, an electrically insulating member provided on the printed circuit board, an electrode plate provided on the electrically insulating member, and an electrically connecting member intervening between the printed circuit board and the electrode plate to have the printed circuit board and the electrode plate electrically connected with each other.

Description

technical field [0001] The present invention relates to an electret condenser microphone for various audio equipment such as a portable phone and a manufacturing method thereof, and more particularly relates to an electret condenser microphone and a manufacturing method thereof, which is equipped with an electrode plate and a membrane Constructed capacitor unit for receiving sound waves for conversion into sound signals representing the sound waves. Background technique [0002] Hitherto, there have been disclosed many kinds of conventional electret condenser microphones, all of which are equipped with a capacitor unit composed of electrode plates and membranes for receiving sound waves to be converted into sound signals representing the sound waves. [0003] Conventional electret condenser microphones of this type have hitherto been used in various audio equipment such as portable telephones. exist Figure 8 and Figure 9 A typical example of a co...

AI Technical Summary

Problems solved by technology

[0012] However, conventional electret condenser microphones suffer from such problems as Figure 10C As shown, in the releasing step, each of the second portion 915 of the side portion 913 of the housing member 910, and the electrical connection member 940 are spaced apart from the printed wiring board 960 because the metal is made of The electrical connection part 940 prevents the second part 915 of the side part 913 of the housing part 910 from moving toward the arrow 901 (as Figure 10B As shown), the given direction shown in ) is deformed, and the second portion 915 of the side portion 913 of the shell part 910 is naturally elastically restored along the central axis 911 of the shell part 910 (as Figure 10C shown)

Images