High intensity focused ultrasonic surgical device with eccentric driving cam

An ultrasonic surgical device including a cartridge for irradiating ultrasonic waves, the cartridge comprising:

• a cartridge housing having an empty inner space filled with a medium;
• an ultrasonic therapy part which is movably provided inside the cartridge housing and includes a transducer for generating focused ultrasonic waves;
• a window through which the ultrasonic waves generated from the transducer pass;
• and
• a driving part which moves the ultrasonic therapy part inside the cartridge housing,
• wherein the driving part is shaped of a cylinder and includes an eccentric driving cam having a rotation axis spaced apart from a center axis of the cylinder;
• the ultrasonic therapy part includes a connecting rod having one side coupled to an outer surface of the eccentric driving cam and a connector coupled to the other side of the connecting rod;
• and
• wherein the transducer moves in one direction according to clockwise rotation of the eccentric driving cam, and as the transducer moves in the one direction, the distance between the window and the transducer repeatedly increases and decreases.