| 摘要 |
PURPOSE: To obtain a highly reliable rod-like ultrasonic oscillator by preventing insufficient conduction due to chipping of a flexible printed board. CONSTITUTION: The rod-like ultrasonic oscillator 1 comprises a multilayer piezoelectric element 5 and a flexible printed board 6 for feeding power thereto clamped by upper and lower oscillators 2, 3. A cutting prevention means for controlling the strength distribution of the flexible printed board 6 with respect to the bending stress is provided in the vicinity of the conducting part of the flexible printed board 6 serving as an electric contact between the rod-like ultrasonic oscillator 1 and an external connector. |
