公开(公告)号：US20010048750A1

公开(公告)日：2001-12-06

申请号：US09866809

申请日：2001-05-30

Applicant: STAR MICRONICS CO. LTD.

Inventor： Motoaki Ito ,  Mikio Suzuki ,  Tomonari Suzuki ,  Yasunori Tsukuda

IPC: H04R009/08

CPC classification number: H04R19/016

Abstract: An insulating bushing of an electret condenser microphone is disposed on the rear side of a back electrode portion and abuts against the rear surface of back electrode plate. When a predetermined force is applied to the insulating bushing from the opened end of the case by way of a fixing ring and a printed circuit board, the insulating bushing deforms so as to fit into a gap formed between the inner peripheral face of the case and an end portion of the back electrode plate. Since the insulating bushing fits between the inner peripheral face of the case and the end portion of the back electrode plate, the back electrode plate is positioned and fixed with respect to the case in a state where the back electrode plate and the case are electrically insulated from each other.

Abstract translation: 驻极体电容麦克风的绝缘衬套设置在背面电极部分的后侧，并与背面电极板的后表面抵接。 当通过固定环和印刷电路板将预定的力从壳体的开口端施加到绝缘套管上时，绝缘衬套变形，以装配在形成在壳体的内周面和 背面电极板的端部。 由于绝缘衬套配合在壳体的内周面和背面电极板的端部之间，所以背面电极板在背面电极板和壳体被电绝缘的状态下相对于壳体定位和固定 从彼此。