Ultrasonic wave generating apparatus capable of adjusting focusing depth of ultrasonic waves

An ultrasonic wave generating apparatus capable of adjusting a focus depth of ultrasonic waves, the ultrasonic wave generating apparatus comprising:

• a handpiece;
• a cartridge housing separably mounted on the handpiece;
• an ultrasonic wave generating unit in the cartridge housing and including a transducer configured to generate the ultrasonic waves;
• a variable shaft connected to the ultrasonic wave generating unit, configured to be movable in a vertical direction of the transducer, and configured to be expanded and contracted in an axial line direction thereof;
• a guide shaft in the cartridge housing, the guide shaft passing through the ultrasonic wave generating unit and configured to guide the ultrasonic wave generating unit such that the ultrasonic wave generating unit is movable in the vertical direction and the axial line direction;
• and
• a manipulation part configured to move the variable shaft in the vertical direction.