A shape memory alloy (hereinbelow referred to as an SMA) storing a bending state is provided to the vibrator 12 on the side opposite to the ultrasonic wave transmitting-receiving side thereof so as to extend in the longitudinal direction of the sheath 1 and a lead wire 16 is connected to...
A shape memory alloy (hereinbelow referred to as an SMA) storing a bending state is provided to the vibrator 12 on the side opposite to the ultrasonic wave transmitting-receiving side thereof so as to extend in the longitudinal direction of the sheath 1 and a lead wire 16 is connected to...