Patent ID: 6937124

Claim:
A plane plate vibration device comprising: a plane plate; a coil portion having a first coil and a second coil, the first coil being wound on a circumference of the plane plate in parallel with the plane plate, the second coil being wound along inside of the first coil in parallel with the plane plate; and magnetic field generating mechanisms that are provided in parallel with the plane plate and generate magnetic fields in directions perpendicular to directions of currents respectively flowing through the first coil and the second coil, wherein: the currents flow through the first coil and the second coil in reverse directions; the directions of magnetic fields perpendicular to the currents respectively flowing through the first coil and the second coil give forces in the same direction; and the plane plate vibrates in a direction of thickness by adjusting the currents respectively flowing through the first coil and the second coil.