| 摘要 |
PURPOSE: A receiving unit for a mobile communication terminal is provided to have high performance, high efficiency, and a wideband frequency reproducing characteristic by using a ring-type magnet and a yoke having a ventilation hole. CONSTITUTION: An upper bridging jaw(14) and a lower bridging jaw(17) are formed in an inner margin portion of a frame(13). A yoke(19) having a ventilation hole(18) is safely received and fixed in a lower plate(24) and an upper plate(26) of the lower bridging jaw(17). A ring-type magnet(20) and an inner margin of a plate(21) are safely received on an upper portion of the yoke(19) for having a rising wall(25) and a magnetic pole space(27). A coil(16) electrically connected to a PCB(22) and fixed at a lower portion of a diaphragm(15) is allocated in an internal portion of the magnetic pole space(27) for safely receiving and fixing the diaphragm(15) in the upper bridging jaw(14) and safely receiving and fixing an upper case(12) in which a plurality of sound exhausting holes(11) are formed on an upper portion of the upper bridging jaw(14).
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