| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a horn device in which suction force is applied to a surface as a whole by preventing uneven contact. Ž<P>SOLUTION: In the horn device 10 including a cylindrical coil 12 which is fixed to a cylindrical case 11 with a bottom, a fixed iron core 13 fixed to the coil 12, a diaphragm 16 mounted to the case 11 with its aperture so as to close, and a moving iron core 17, which is connected to the diaphragm 16 and which faces the fixed iron core 13 so as to come close to or separate from it; facing edge faces of the fixed iron core 13 and the moving iron core 17 are formed in a concave face 13c and a convex face 17e, respectively; and the radius of curvature of the convex face 17e is set smaller than that of the concave face 13c. Since facing faces are convex and concave, unbalanced contact is prevented. Since the direction of the magnetic flux generated from the fixed iron core becomes directed to the inside, the magnetic flux received by the moving iron core increases, and thereby suction force is increased. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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