Importance

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Abstract

A small-size, thin-profile vibration generating device capable of functioning with improved durability and reliability and with less consumption of power includes a yoke constituting an electromagnet on which a coil has been wound, and a movable element having permanent magnets. The movable element is disposed in a gap, which is provided in the closed magnetic circuit of the yoke, in such a manner that both end faces of the movable element form prescribed gaps with end faces of the yoke. The movable end of a leaf spring is attached to the movable element. The other, fixed end of the leaf spring is attached to the center of the yoke. When the movable element vibrates in the gap, magnetic poles at the end faces of the yoke approached by the end faces of the movable element are magnetically energized by flow of a current in order to be made identical with magnetic poles at the end faces of the movable element, thereby repelling the movable element. The result is that vibration is produced at a prescribed oscillation frequency.

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First Claim