| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress torsional stress or the like which can be applied to a piezoelectric element, to suppress variations of the vibration characteristics, and to perform miniaturization and output increase. <P>SOLUTION: The ultrasonic transducer 1 includes: piezoelectric elements 8, 9, 10 and 11; a front surface plate 2 and a backing plate 3 for clamping the piezoelectric elements 8, 9, 10 and 11; and a side face plate 12 respectively welded to the front surface plate 2 and the backing plate 3 while surrounding the piezoelectric elements 8, 9, 10 and 11 while being interposed between the front surface plate 2 and the backing plate 3 of each other. Also, the front surface plate 2, the backing plate 3 and the side face plate 12 are welded in the state that the piezoelectric elements 8, 9, 10 and 11 are pressurized through the front surface plate 2 and the backing plate 3. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
