Invention Grant

Vibration actuator
Abstract:
A vibration actuator has a frame; a first spring, supported on one end within the frame and the other end vibrates along an axial direction. A second spring, supported on one end within the frame, and the other end vibrates along the axial direction. A first weight connected to the other end of the first spring and a second weight connected to the other end of the second spring. A magnet portion protrudes in the axial direction is in the first weight and a coil wrapped around the magnet portion is in the second weight. A driving current of a frequency that is a first resonant frequency set by the spring constant of the first spring and the mass of the first weight or a second resonant frequency set by the spring constant of the second spring and the mass of the second weight is applied to the coil.
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