| 摘要 |
PROBLEM TO BE SOLVED: To provide a tweeter capable of increasing magnetic force in a magnetic cavity even with the magnet of small magnetic force. SOLUTION: This loudspeaker has a U-shaped yoke 10 of a prescribed length with which one side wall 10a is lower than another side wall 10b, a center plate 13 fixed through a magnet 12 to the side wall 10a or 10b while being arranged between the side walls 10a and 10b, a first plate 14 for forming a slender first magnetic cavity 15 between the other end face and the side face of the center plate 13 while fixing one end to the upper end of one side wall 10a, a second plate 16 provided parallel with the other side wall 10b above the other end of the first plate 14, a third plate 17 for forming a slender second magnetic cavity 18 between the other end face and the side face of the second plate 16 while fixing one end to the upper end of the other side wall 10b, and a diaphragm 20 equipped with a plane voice coil around the first and second magnetic cavities 15 and 18 while fixing one end side through a gasket 22 onto the third plate 17 and inserting the other end side to the first and second magnetic cavities 15 and 18.
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