COMPONENT MEMBER FOR SPEAKER INSTRUMENT AND SPEAKER INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To provide a component member, or the like for a speaker instrument capable of improving corrosion resistance, heat resistance, or the like.;SOLUTION: The component member for a speaker instrument is formed by a magnesium-based material, where calcium is added to magnesium or a magnesium alloy. In this case, the component member for a speaker instrument includes a frame, a voice coil bobbin, a damper, a diaphragm, an edge, a cap, a casing, and the like. In a preferable example, preferably, the amount of addition of calcium to the magnesium or the magnesium alloy is 0.1-50 wt.%, thus covering the surface of the magnesium-based material with a dense and smooth calcium oxide film. Therefore, the component member for a speaker instrument interrupts the connection to oxygen in the air and hence does not become rusty and burn easily. As a result, the corrosion resistance and heat resistance can be improved as compared with a material made of a magnesium single body.;COPYRIGHT: (C)2008,JPO&INPIT