| CPC A61N 7/00 (2013.01) [A61N 2007/0091 (2013.01)] | 15 Claims |
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1. A structure of a surgical device for irradiating focused ultrasound to multiple depths, the structure built into the surgical device comprising:
a motor equipped with a rotating shaft;
a ball screw rotating by power of the motor, having a first external screw thread engraved on an outer side, and having an accommodation groove formed in a longitudinal direction on a portion of the outer side;
a ball nut having an internal screw thread engraved on an inner side that meshes with the first external screw thread when the ball screw is penetrated, and moving linearly by following rotation of the ball screw;
a first gear having a protrusion formed on an inner side that is fitted into the accommodation groove when the ball screw is penetrated to follow the rotation of the ball screw, engaging with the ball nut to follow a linear movement of the ball nut, and having a second external screw thread engraved on an outer diameter;
a second gear having a third external screw thread engraved on an outer diameter and meshing with the second external screw thread to follow the rotation of the first gear, and having an eccentric shaft provided asymmetrically;
a first transducer assembly moving horizontally by linear movement of the ball nut and the first gear, and vertically moving up/down to irradiate the focused ultrasound to the multiple depths; and
a housing formed with a horizontal long hole that is coupled with the first transducer assembly while boxing the ball nut, the first gear, and the second gear and converts rotational energy of the second gear into up/down movement energy for vertically moving the first transducer assembly up/down while interfering with the rotation of the second gear by interlocking with the eccentric shaft.
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