Vibrator

Abstract

A vibrator includes: a housing having an interior space; a vibrating member having a plate shape, having both end portions fixedly installed within the housing, and including space forming parts disposed on both side surfaces thereof; a piezoelectric element fixedly installed on the vibrating member so as to be disposed inwardly of the space forming parts; and a weighting body disposed on the piezoelectric element and linked to the vibrating member to be vibrated, wherein the piezoelectric element is installed on the vibrating member so as to be disposed to be spaced apart from inner surfaces of the space forming parts at predetermined intervals, and the piezoelectric element includes a main electrode formed by an electrode pair and at least one preliminary electrode formed by an electrode pair and disposed to be spaced apart from the main electrode.

What is claimed is: 
     
         1 . A vibrator comprising:
 a housing having an interior space;   a vibrating member having a plate shape, having both end portions fixedly installed within the housing, and including space forming parts disposed on both side surfaces thereof;   a piezoelectric element fixedly installed on the vibrating member so as to be disposed inwardly of the space forming parts; and   a weighting body disposed on the piezoelectric element and linked to the vibrating member to be vibrated,   wherein the piezoelectric element is installed on the vibrating member so as to be disposed to be spaced apart from inner surfaces of the space forming parts at predetermined intervals, and   wherein the piezoelectric element includes a main electrode formed by an electrode pair and at least one preliminary electrode formed by an electrode pair and disposed to be spaced apart from the main electrode.   
     
     
         2 . The vibrator of  claim 1 , wherein the piezoelectric element is fixedly installed on the vibrating member by an adhesive and the adhesive is filled into a space formed between both side surfaces of the piezoelectric element and the inner surfaces of the space forming parts.