| 摘要 |
PURPOSE: A receiver unit of a portable mobile communication terminal is provided to be overall shaped in rectangular type, and to reduce length of a vertical direction, thereby increasing space usage efficiency and making size of a display portion bigger in a portable mobile communication terminal. CONSTITUTION: A frame(10) is in rectangular shape, forms a pierced center, and is inserted. A permanent magnet(20) is injected into the pierced center of the frame(10), and generates an electromagnetic field. A yoke(30) is spaced from the permanent magnet(20). A plate(40) is contacted with an upper side of the permanent magnet(20). A voice coil(50) vertically moves between the permanent magnet(20) and the yoke(30), and generates an electromotive force. A diaphragm(60) vertically vibrates by the electromotive force, and generates a sound pressure. A grill(70) protects the voice coil(50) and the diaphragm(60), and forms plural soundproof holes. A grill screen(80) prevents foreign substance from incoming through the soundproof holes.
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