Piezoelectric vibration module

摘要

Disclosed herein is a piezoelectric vibration module that includes a side damper between a vibration plate with a piezoelectric element and an upper case so as to ensure reliability against external shock applied to the side and narrows a spaced distance between the vibration plate and the upper case.

主权项

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 so that the piezoelectric element vibrates linearly, and dampers protruding toward the center on the inner surface are provided; 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 the piezoelectric element on a flat lower plate and placed in the upper case and the lower case and driven vertically, wherein the vibration plate includes: the lower plate; a pair of upper plates that stand vertically upward at the centers of both sides of the lower plate; and a weight body placed between the pair of upper plates in order to increase the vibration force of the piezoelectric element.