Patent ID: 8644545
Filing Date: 2014-02-04
Classification: H04R

Abstract:
1. A condenser microphone unit comprising: a diaphragm pasted to a first surface of a diaphragm ring, wherein the diaphragm ring holds the diaphragm at a predetermined tension; a fixed electrode provided opposite to the diaphragm with a gap therebetween, the fixed electrode and the diaphragm defining a capacitor; a unit casing accommodating the diaphragm ring, the diaphragm, and the fixed electrode; a fixing ring fixed to the unit casing, the fixing ring indirectly fixing the diaphragm ring to an interior of the unit casing; a projected portion projecting from a second surface of the diaphragm ring, wherein the second surface is opposite to the first surface of the diaphragm ring; a planar ring portion comprising the fixing ring; and a plurality of projections comprising the fixing ring, the plurality of projections projecting from an internal periphery of the planar ring portion and being provided in a circumferential direction, wherein the plurality of projections urges the projected portion of the diaphragm ring toward the fixed electrode.