Patent ID: 7967755

Claim:
An ultrasonic probe comprising: a group of piezoelectric elements consisting of a plurality of piezoelectric elements of a narrow card shape arrayed in a long-axis direction thereof and a rotational mechanism that rotates and oscillates said group of piezoelectric elements to the left and right in a short-axis direction thereof about the center of said long-axis direction; wherein said rotational mechanism is provided with a first bevel gear having teeth in at least an arc shape wherein the first bevel gear is fabricated from metal, a second bevel gear meshing with said first bevel gear and rotating in the long-axis direction wherein the second bevel gear is fabricated from a synthetic resin, first and second pulleys each provided with uneven grooves and a drive motor that rotates said second bevel gear via said first and second pulleys; the rotational axis of said second bevel gear and the rotational axis of said drive motor are linked by the first and second pulleys using a belt mutually meshing with the uneven grooves of the first and second pulleys.