PIEZOELECTRIC SOUNDER AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To obtain the piezoelectric sounder in which a substantial diameter of a metal-made diaphragm is prevented from being decreased and miniaturization is attained regardless of it. SOLUTION: An adhesives is coated from a 2nd taper 7i of a back side case 7 over a leakage hole 7c of a counter wall 7a. A torus adhesion tilt face is formed by the 2nd taper 7i. An adhesives layer N is formed by evaporating a solvent of the adhesives. A damping cloth 9 is adhered to the counter wall 7a by using the adhesive characteristic of the adhesives layer N. A metal-made diaphragm 8a of a piezoelectric vibrator 8 is pressed on the adhesives layer N formed on the 2nd taper 7i. A circumferential wall 7b of the back side case 7 and a circumferential wall 6b of the front side case 6 are fitted together.