| 摘要 |
PURPOSE: A microspeaker magnetic circuit is provided to easily achieve the coupling of magnetic circuit component and to increase operation efficiency and productivity by combining a magnet and an upper plate with a speaker frame by injection molding in a single unit, without a coupling process using additional adhesives. CONSTITUTION: A microspeaker magnetic circuit(500) consists of a yoke part(100), a magnet(200), an upper plate(300), and a speaker frame(400). The yoke part(100) having a flat board part(110) and a fixing part(130) is coupled to the speaker frame(400). An irregular part(120) is protruded from the center of the flat board part(110). The magnet(200), located on the upper side of the flat board part(110) and forming a magnetic circuit, has a penetration hole(220), into which the irregular part(120) is inserted. The upper plate(300), arranged on the upper side of the magnet(200), has a penetration hole(320), into which the irregular part(120) is inserted. The speaker frame(400), coupling and fixing the yoke part(100), the magnet(200) and the upper plate(300) in a single unit, is molded through insert injection.
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