Handpiece for skin laser treatment and medical laser treatment apparatus including the same

A handpiece for skin laser treatment, the handpiece comprising:

• a handpiece body including a laser irradiation portion for irradiating a laser beam to a treatment target area of a skin of a person to be treated and a refrigerant spraying portion for spraying a refrigerant in the treatment target area;
• and
• an end tool member provided at an end of the handpiece body and configured to maintain a distance between the laser irradiation portion and a skin contact portion of the end tool member in contact with the skin of the person to be treated and to at least partially limit a target area corresponding to the treatment target area,
• wherein the refrigerant spraying portion includes a refrigerant spray nozzle having a refrigerant outlet for discharging the refrigerant toward the target area;
• and a nozzle positioning member configured to connect to the refrigerant spray nozzle and to adjust a distance between the refrigerant spray nozzle and the target area by changing a position of the refrigerant spray nozzle,
• a range of the refrigerant that is sprayed to the skin of the person to be treated is configured to be controllable by adjusting the distance between the refrigerant spray nozzle and the target area using the nozzle positioning member,
• the refrigerant spray nozzle has a first hollow hole through which the refrigerant passes and a first spiral portion is provided on an inner surface of the first hollow hole,
• the nozzle positioning member has a second hollow hole which the refrigerant passes through and communicates with the first hollow hole,
• the nozzle positioning member includes a threaded insertion portion configured to be inserted into the first hollow hole and to be coupled with the refrigerant spray nozzle and having a second spiral portion engaged with the first spiral portion on its outer circumferential surface and an adjustment head provided at an upper end of the threaded insertion portion, and
• the distance between the refrigerant spray nozzle and the target area is configured to be adjustable by rotating the adjustment head.