Piezoelectric vibration module

Abstract

Disclosed herein is a piezoelectric vibration module including: a piezoelectric element repeatedly extended and compressed according to application of external power to generate vibration force; a vibration plate having the piezoelectric element coupled to one surface thereof and repeatedly extended and compressed integrally with the piezoelectric element to transfer the vibration force of the piezoelectric element to an external component; a weight body having a central portion coupled to the other side of the vibration plate in order to increase the vibration force of the piezoelectric element; and a coupling member fixedly coupling the central portion of the weight body and the vibration plate to each other.

1 - 20 . (canceled) 
     
     
         21 . A vibration module comprising:
 a piezoelectric element;   a vibration plate configured to be vibrated in response to driving of the piezoelectric element; and   a weight body having a central portion coupled to the vibration plate to increase a vibration associated with the vibration plate.   
     
     
         22 . The vibration module of  claim 21 , wherein:
 the vibration plate has multiple sides;   the central portion of the weight body is fixedly coupled to one of the multiple sides of the vibration plate; and   the piezoelectric element is coupled to a surface of the vibration plate.   
     
     
         23 . The vibration module of  claim 21 , further comprising:
 one or more contact prevention members attached to the weight body so as to prevent contact between the vibration plate and the weight body.   
     
     
         24 . The vibration module of  claim 21 , wherein the piezoelectric element is configured to be extended and compressed in response to application of power. 
     
     
         25 . The vibration module of  claim 24 , further comprising a flexible circuit configured to apply the power to the piezoelectric element. 
     
     
         26 . The vibration module of  claim 21 , wherein the central portion of the weight body is coupled to a point of the vibration plate which the vibration plate is maximally vibrated in response to the driving of the piezoelectric element. 
     
     
         27 . The vibration module of  claim 21 , further comprising:
 a case; and   at least one contact prevention member arranged between the case and the weight body so as to prevent contact therebetween.   
     
     
         28 . The vibration module of  claim 27 , wherein the contact prevention member is made of an elastic material and attached to an surface of the weight body or an inner side of the case.