发明名称 Elektromekanisk, akustisk transduser og fremgangsmÕte for fremstilling av en slik transduser
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 NO993265(D0) 申请公布日期 1999.06.30
申请号 NO19990003265 申请日期 1999.06.30
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;(IPC1-7):B06B 主分类号 H04R31/00
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