Patent ID: 8917009
Filing Date: 2014-12-23
Classification: H02N

Abstract:
1. A vibration generator comprising: at least one piezoelectric element subjected to compression and expansion in response to input power; a vibration plate including a body elongated in a lengthwise direction and having the at least one piezoelectric element mounted thereon, and generating vibrations by the compression and expansion of the at least one piezoelectric element; at least one mass part adding a preset magnitude of mass to the vibration plate; and support parts placed at each end of the body in the lengthwise direction, and supporting and fixing the body; and at least two mounting plates attached to different sides along the lengthwise direction of the body of the vibration plate and at least one of the two mounting plates having the at least one mass part mounted thereon to apply the mass of the at least one mass part to the vibration plate, wherein the body, except for portions of the body corresponding to the support parts, is bent when vibrations are applied to the body.