Patent ID: 9379305
Filing Date: 2016-06-28
CPC Classification: B06B,H01L

Claim Text:
1. A piezoelectric vibration module, comprising: a piezoelectric element generating vibration force through repetition of extension and shrinkage deformation by applying external power; an upper case having a bottom surface opened and an inner space formed therein; a lower case coupled to the bottom surface of the upper case and shielding the inner space of the upper case; and a vibration plate including a lower plate at which the piezoelectric element is mounted and a stopper extending vertically downward at an edge of the lower plate, the vibration plate placed in the inner space of the upper case and the lower case and being driven vertically by the extension and shrinkage deformation of the piezoelectric element, wherein the stopper is extended spaced apart from the lower case with a gap, and the length of the extension of the stopper is shorter than a space distance between the lower plate and the lower case, and wherein the piezoelectric element is prevented from being damaged due to direct contact with the lower plate.