Patent ID: 8270653
Filing Date: 2012-09-18
Classification: H04R

Abstract:
1. A microphone-unit supporting structure comprising a microphone unit and a holder; wherein the microphone unit includes a substantially-cylindrical microphone element having a front and a back, a printed circuit board fixed to the back of the microphone element, and at least two projections extending radially outward from the printed circuit board and being circumferentially spaced at such an angular interval that when one of the projections is assumed to be on a reference line for line symmetry, the other projection or projections are off the reference line; and wherein the holder includes a microphone-unit supporting portion having a front, a back, and an inner wall surface and supporting the microphone unit in a manner such that at least a back end part of the microphone unit is loosely fitted in the microphone-unit supporting portion and at least a part of a side of the microphone unit faces the inner wall surface, a seat projecting from the inner wall surface and supporting a part of the printed circuit board, a first groove extending outward from the inner wall surface and receiving first one of the projections to loosely support the first one of the projections, and a second groove extending outward from the inner wall surface and receiving second one of the projections to loosely support the second one of the projections, the first groove being open in a backward direction, the second groove being open in a frontward direction.