| 摘要 |
PROBLEM TO BE SOLVED: To make a three-dimensional ultrasonic probe smaller and lighter, to improve its operability and to improve waterproofness around the rotation shaft. SOLUTION: A motor 7 rotates an ultrasonic oscillator unit 3 wherein a plurality of ultrasonic oscillators are one-dimensionally arranged to scan it in a three-dimensional space. A group 15 of signal lines for connecting the ultrasonic oscillator unit 3 with a rotor 11 of a slip ring part 9 is inserted into the hollow part 5a of the rotational shaft 5 of the motor 7 and an O-ring 23 is provided around the rotational shaft 5 to hold watertightness of a water bag 21. |
