JPS61187189U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of a condenser microphone according to this invention, Fig. 2 is a bottom view of a diaphragm ring incorporated in the embodiment;
FIG. 3 is a sectional view taken along the line - in FIG. 2, and FIG. 4 is a plan view of the spacer ring incorporated in the same embodiment.
FIG. 5 is an equivalent acoustic circuit of the same embodiment, FIG. 6 is a sectional view of a main part showing a modified embodiment of this invention, and FIG. 7 is a sectional view of a conventional example. In the figure, 10 is a diaphragm ring, 11 is a diaphragm, 12 is an insulating seat, 13 is a back electrode, 14 is a spacer ring, 20 is an annular groove, 21 is a sound wave introduction groove, and 22 and 23 are notch grooves.

Claims (1)

[Claims for Utility Model Registration] (1) A diaphragm stretched over a diaphragm ring and a back electrode supported by an insulating seat are placed above the diaphragm, and the diaphragm is placed opposite to the back electrode via a spacer ring. In the condenser microphone, each of the diaphragm ring, the diaphragm, and the spacer ring is provided with a notch for forming a communication path from the front side of the diaphragm to the back side thereof. Condenser microphone. (2) In claim (1) for utility model registration, the end face of the diaphragm ring facing the spacer includes an annular groove and at least one sound wave introduction groove extending from the inner peripheral surface of the diaphragm ring to the annular groove. The diaphragm and the spacer ring are provided with a cutout groove that communicates between the back side of the diaphragm and the annular groove at a position different from the sound wave introduction port. condenser microphone. (3) The condenser microphone according to claim (2), characterized in that the sound wave introducing groove and the notch groove are provided at opposing positions with an interval of 180 degrees.