发明名称 ELECTRIC-MECHANICAL-ACOUSTIC TRANSDUCER AND A METHOD OF MANUFACTURING THE SAME
摘要 The present invention relates to an electric-mechanical-acoustic converter used mainly in a mobile telephone and the like, and its objective is to provide a high-quality product in which damage and degradation of performance caused by shock due to a drop are prevented. In order to achieve this objective, the present invention includes at least one suspension (14) supporting a movable portion (19) formed of the magnetic circuit portion (17) and a weight portion (13), and a frame (9) supporting a diaphragm (8) and the suspension (14), a space in an elastic deformation range of the suspension (14) being provided between the outer periphery of the movable portion (19) and the frame (9). Even in the case where a portable terminal apparatus is dropped, and the electric-mechanical-acoustic converter built therein is subjected to shock, the outer periphery of the movable portion (19) is received by the frame (9), whereby the suspension (14) can be prevented from being permanently deformed. <IMAGE>
申请公布号 EP0970758(A4) 申请公布日期 2005.12.28
申请号 EP19980950448 申请日期 1998.10.29
申请人 MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 发明人 FUKUYAMA, TAKANORI
分类号 H04R31/00;B06B1/02;B06B1/04;G10K9/22;H04M1/03;H04R9/06;H04R11/02 主分类号 H04R31/00
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