| 摘要 |
PURPOSE:To reduce the diameter of an inserting part and to miniaturize an ultrasonic diagnostic device by providing electrodes on a facing rotor and stator and providing an electrostatic motor, which impresses a voltage to these electrodes and moves the rotor, in the tip part of the inserting part. CONSTITUTION:An electrostatic motor 10 is composed of a stator 8 fixed to the tip part of an inserting part 4, and rotor 9 facing to this stator 8. In the stator 8, plural electrodes 8 are provided and these electrodes are formed by aluminium, etc., between first and second insulating layers 8b and 8c. In the rotor 9, plural electrodes 9d are provided between first and second insulating layers 8b and 9c. When the voltage is impressed between electrodes C and (c) in a state the electrode B of the stator 8 is correspondent to an electrode (b) of the rotor 9, the electrodes C and (c) are mutually attracted and the rotor 9 is moved to a side where the electrode B is arranged. This operation is successively repeated and the rotor 9 is moved in the axial direction of the inserting part 4. With this movement of the rotor 9, an ultrasonic vibrator 12 fixed to the rotor 9 is moved and the echo having a different cross section is received by the ultrasonic vibrator 12. |
