Patent ID: 7062052

Claim:
An electret condenser microphone for receiving an acoustic wave to be converted to an acoustic signal indicative of said acoustic wave, comprising: a casing member; a circuit board disposed in said casing member and having a peripheral portion supported by said casing member, and a central portion integrally formed with said peripheral portion of said circuit board and radially inwardly extending from said peripheral portion of said circuit board; an electrically insulating member disposed on and along said peripheral portion of said circuit board, said electrically insulating member having an outer surface opposing and spaced apart from said casing member, and an inner surface defining a central opening; an electrode plate mounted on said electrically insulating member; a plurality of electrically connecting members each intervening between said circuit board and said electrode plate to have said circuit board and said electrode plate electrically connected with each other, each of said electrically connecting members having a first portion disposed along said inner surface of said electrically insulating member, a second portion integrally formed with said first portion and radially outwardly extending from one end of said first portion, and a third portion integrally formed with said first portion and radially outwardly extending from the other end of said first portion; and a diaphragm disposed along said electrode plate and spaced apart from said electrode plate at a predetermined space distance and in which said electrically insulating member is formed with a plurality of guide grooves, and in which each of said electrically connecting members is received in each of said guide grooves of said electrically insulating member.