Cartridge for high intensity focused ultrasound device comprising piezoelectric linear motor and piezoelectric linear motor

A cartridge for a high intensity focused ultrasound device, comprising:

• a cartridge housing in which a sound transmission medium is stored and a transmission window sealed by an ultrasound transmission film is formed in a lower portion thereof;
• a transducer embedded in the cartridge housing, controlled by a main body, and configured to generate a high intensity focused ultrasound;
• and
• a piezoelectric linear motor embedded in the cartridge housing, controlled by the main body, and configured to move the transducer,
• wherein the piezoelectric linear motor includes:
• a dome type piezoelectric actuator;
• a transfer shaft that is disposed at and perpendicular to a center of a convex surface of the piezoelectric actuator and formed to have a predetermined length;
• a connector connecting the piezoelectric actuator and the transfer shaft;
• silver electrodes applied on an upper surface and a lower surface of the piezoelectric actuator;
• and
• wires connected to the silver electrodes,
• wherein the piezoelectric actuator is covered by a housing for waterproofing, and a transfer member is coupled to the transfer shaft so that the transfer member is moveable along the transfer shaft.