MICROPHONE UNIT

• Main Authors: NAKANISHI KENSUKE, AWAMURA RYUJI, HARANO HIROYUKI, MATSUSHITA TSUTOMU
• Format: Patent
• Language: English; Japanese
• Published: 16.08.2022
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; PUBLIC ADDRESS SYSTEMS

To provide a microphone unit with a small size and a low cost, which corresponds to a maximum level IPX9K of an on-vehicle IP(K) test.SOLUTION: A microphone unit comprises: a cylindrical case in which an upper surface and a lower surface are opened; a metal waterproof film having a thickness of 0.01 mm or more and 0.05 mm or less, a hardness of 100HV or more, a bearing force of 70 N/mm2 or more, a tension strength of 350 N/mm2 or more, and fixed to a lower surface of the case so as to block an open part of the lower surface of the case; a substrate arranged within the case; a microphone mounted on the substrate; and a sealing member that seals the open part of the upper surface of the case.SELECTED DRAWING: Figure 2 【課題】車載用ＩＰ（Ｋ）試験の最高レベルＩＰＸ９Ｋに対応し、小型かつ低コストなマイクロホンユニットを提供する。【解決手段】上面と下面が開口した筒形状のケースと、厚さ０．０１ｍｍ以上０．０５ｍｍ以下、硬度１００ＨＶ以上、耐力７０Ｎ／ｍｍ２以上、引張強さ３５０Ｎ／ｍｍ２以上であって、ケースの下面の開口部を塞ぐようにケースの下面に固着された金属製の防水膜と、ケース内に配置された基板と、基板に実装されたマイクロホンと、ケースの上面の開口部を封止する封止部材を含む。【選択図】図２