| 摘要 |
A speaker is provided to implement miniaturization by replacing the existing composition of a yoke, a magnet, and a plate with a pair of magnets. A speaker(200) includes a frame(201), a vibration plate(204), an upper magnet(202), a lower magnet(203), and a voice coil(205). The frame(201) has a ring shape of which upper and lower parts are opened. A protrusion is formed at an inner circumference of a central part of the frame(201). The vibration plate(204) is coupled to an upper part of the protrusion of the frame(201). The upper magnet(202) is coupled to an inner circumference of an upper part of the frame(201), is supported and fixed to the upper part of the protrusion of the frame(201), and fixes the vibration plate(204) to prevent the separation of the vibration plate(204). The lower magnet(203) is coupled to an inner circumference of a lower part of the frame(201), is supported and fixed to a lower part of the protrusion of the frame(201), and is installed to make the same polarities of the upper and lower magnet(202,203) face each other. The voice coil(205) is coupled to the vibration plate(204), and moves up and down by a magnetic field generated by the upper and lower magnets(202,204). |
