| 摘要 |
An electroacoustic transducer includes a yoke ( 1 ) having an annular intermediate yoke portion ( 1 a), an inner yoke portion ( 1 b) and an outer yoke portion ( 1 c), a permanent magnet ( 3 ) provided on the outer yoke portion so as to surround the inner yoke portion and forming a magnetic gap (G) between itself and the inner yoke portion ( 1 b), a voice coil ( 6 ) inserted into the magnetic gap, and a diaphragm ( 4 ) supporting the voice coil. The diaphragm has an outer annular portion ( 4 a) secured to the inner peripheral surface of the outer yoke portion ( 1 c) and extending toward the inner yoke portion, an inner portion ( 4 b) disposed to face the distal end opening ( 1 e) of the inner yoke portion ( 1 b), and a cylindrical portion ( 4 c) connected between the inner portion and the outer annular portion. The inner portion ( 4 b) of the diaphragm has a dome portion that is convex toward the distal end opening.
|
