ULTRASONIC GENERATION DEVICE

摘要

An ultrasonic generation device including an ultrasonic generation element having a frame, a first piezoelectric vibrator, and a second piezoelectric vibrator and configured to emit ultrasonic waves in a buckling tuning-fork vibration mode in which the first piezoelectric vibrator and the second piezoelectric vibrator vibrate in mutually opposite phases at the same frequency. Further, a housing receives the ultrasonic generation element and has ultrasonic emission ports, a first acoustic path extending from a vicinity of a vibration surface of the first piezoelectric vibrator to a vicinity of the ultrasonic emission ports, and a second acoustic path extending from a vicinity of a vibration surface of the second piezoelectric vibrator to the vicinity of the ultrasonic emission ports.

主权项

1. An ultrasonic generation device comprising:
a housing having at least one ultrasonic emission port; and an ultrasonic generation element disposed in the housing, the ultrasonic generation element including:
a frame having first and second surfaces and a through hole in a center portion thereof,a first planar piezoelectric vibrator bonded to the first surface of the frame, anda second planar piezoelectric vibrator bonded to the second surface of the frame,wherein the ultrasonic generation element is configured to emit ultrasonic waves in a buckling tuning-fork vibration mode such that the first and second planar piezoelectric vibrators vibrate in mutually opposite phases at a vibration frequency, wherein the ultrasonic generation element is disposed in the housing to define a first acoustic path that extends from a vibration surface of the first planar piezoelectric vibrator to the at least one ultrasonic emission port and a second acoustic path that extends from the second planar piezoelectric vibrator to the at least one ultrasonic emission port.