| 摘要 |
<p>The present invention addresses the problem of providing an ultrasonic tool capable of inhibiting a retaining member in a secured state from becoming unstable in relation to an attachment hole for a retaining member, even when the fastening torque of a screw member for securing the retaining member in the attachment hole is low. An ultrasonic cutter is provided with: an ultrasonic transducer having a support part (13) in which an attachment hole (31) is formed in the tip surface, and a screw hole (32) is formed in the circumferential wall of the tip section so as to pass through the attachment hole (31); a retaining member (17) having a notch groove (35) in which a cutter blade (16) can be inserted and being removably inserted in the attachment hole (31) with the cutter blade (16) inserted in the notch groove (35); and a screw member (33) which presses against the retaining member (17) inserted into the attachment hole (31) by being threaded into the screw hole (32), the retaining member (17) being pressed against the circumferential surface of the attachment hole (31) together with the cutter blade (16). The retaining member (17) contacts the circumferential surface of the attachment hole (31) at two prescribed contact positions (M) surrounding the center axis line (A) of the attachment hole (31) when the retaining member (17) is pressed between the screw member (33) and the circumferential surface of the attachment hole (31).</p> |
