| 摘要 |
PURPOSE: A dual mono/stereo micro speaker having a dual sound source structure is provided to execute high-power/high-efficiency sound conversion with a subminiature and superslim single unit by adopting a dual sound source structure and an auxiliary magnetic circuit structure and to achieve the regeneration of the origination sound with a mono/stereo speaker according to electrode pad connection methods. CONSTITUTION: A dual mono/stereo micro speaker consists of a single square frame(22) and a single yoke(40). In the yoke(40), the first speaker(20a) and the second speaker(20b) are embedded in a single unit. The first speaker(20a) and the second speaker(20b) selectively serve as a dual mono speaker or a dual stereo speaker according to the connection states of the electrode pads of a PCB(50). The front side of the frame(22) is opened. A plurality of vents(30) are arranged on the right and left of the bottom(22a) of the frame(22) so that diaphragms(31a,31b) can be smoothly vibrated. The yoke(40) has 3 circular concave slots(42) formed in the inside of an elliptical body. In the inside of each concave slot(42), a disk-type permanent magnet(61-63) is installed. Disk-type plates(64,65) are respectively fixed on the upper parts of the permanent magnets(61,63) forming magnetic gaps(G1,G2). The disk-type plates(64,65) are to improve conversion efficiency by concentrating magnetic flux force on their respective magnetic gaps(G1,G2).
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