Patent ID: 8059848

Claim:
A condenser microphone unit comprising: a microphone capsule having first internal threads for connection on the rear end side of a capsule case, in which a diaphragm and a backplate are arranged opposedly in the capsule case; a capsule support having second internal threads for connection on the upper end side and a cord introduction hole on the lower end side; and a ring coupler having external threads almost upper half of which is threadedly engaged with the first internal threads and almost lower half of which is threadedly engaged with the second internal threads, which connects the microphone capsule and the capsule support to each other, in which a circuit board having an impedance converter is housed in a cylindrical housing part of the capsule support, and one end side of a microphone cord consisting of a two-core shield covered wire is drawn through the cord introduction hole and is connected to the circuit board, wherein the microphone cord includes a shield covering wire exposure part, in which a shield covering wire is stripped out, on one end side on which the microphone cord is drawn into the capsule support; and a shield cup, which includes a small-diameter cylindrical part through which the shield covering wire exposure part is inserted and which is fixed to the shield covering wire exposure part by staking, and a large-diameter cylindrical part which has an outside diameter increased from the upper end of the small-diameter cylindrical part so as to be smaller than the outside diameter of the circuit board and extends to a position at which the large-diameter cylindrical part is in contact with the lower surface of the circuit board, is provided in the capsule support, and a flange part having an outside diameter increased so as to be almost equal to the outside diameter of the circuit board is formed on the surface on which the large-diameter cylindrical part is in contact with the circuit board; a board pressing step part for pressing the upper surface side of an outer peripheral edge part of the circuit board is formed at the inner periphery on the upper edge side of the ring coupler; and a staking allowance which goes around to the lower surface side of the flange part to integrate the circuit board and the flange part with each other between the staking allowance and the board pressing step part is connectingly provided on the lower edge side of the ring coupler.