| 摘要 |
PURPOSE:To provide a piezoelectric sounder capable of increasing its productivity by using a case and piezoelectric diaphragm commonly for needs of various sound pressure characteristics, in a piezoelectric sounder used for alarm sound, etc., of electronic devices, etc. CONSTITUTION:A cylindrical member 15 is fitted closely into a mounting hole formed on the bottom of the recessed groove of a case 11, the through hole 16 of the cylindrical member 15 is used as a sound release hole, and a piezoelectric diaphragm 20 is stored in the recessed groove 12 in the case 11. Since the through hole 16 in the cylindrical member 15 is used for the sound release hole, the case 11 and piezoelectric diaphragm 20 are used commonly and the sounder can cope with needs of diversified sound pressure characteristics by the replacement of the cylindrical member 15. |
