Abstract: Disclosed is a skin treatment laser apparatus using complex irradiations with different pulse durations. A skin treatment laser apparatus using complex radiations with different pulse durations according to the present invention comprises: a laser generation device for modulating at least one reference laser ray into multiple laser rays having different energy magnitudes and pulse durations, and alternating multiple laser rays so as to repeatedly output the alternated laser rays; and a laser irradiation device for irradiating a skin lesion with the multiple laser rays are alternated to be repeatedly applied by the laser generation device, so that laser ays having different pulse durations can be alternately and repeatedly irradiated onto a skin lesion for a laser irradiation period of time according to a chromophore, thereby improving the efficiency of laser treatment.

Abstract: Disclosed are a needle tip mounted in a cartridge form (in a replaceable manner) to a hand piece of the skin treatment apparatus and allowing a drug to be injected deeply into an invaded potion, and a skin treatment apparatus having the needle tip mounted thereon. The needle tip includes a casing hollow in a vertical direction; a needle unit disposed in the casing and reciprocating in the vertical direction; and at least one sealing member disposed between the casing and the needle unit, wherein the needle unit includes: a housing disposed inside the casing; and at least one needle electrode disposed in the housing of the needle unit and extending in the vertical direction, wherein the at least one sealing member closes a space between the casing and the housing of the needle unit in the vertical direction.

Abstract: Provided are a medicine injecting tip, which injects a medicine into a hole in a skin formed by a needle while invading the needle to a preset depth of a deep portion of the skin, a hand piece equipped with the medicine injecting tip, and a skin treatment device using the medicine injecting tip. The medicine injecting tip includes a cylinder, a plunger that reciprocates downward and upward, and has a first space and a second space formed inside the cylinder, and a needle disposed in the plunger and disposed in the second space of the cylinder. The needle is inserted into a skin and a negative pressure state is formed in the second space when the plunger moves downward, and the needle is discharged from the skin and a positive pressure state is formed in the second space, when the plunger moves upward.

Abstract: A needle tip mounted on a skin care device and the skin care device are provided to prevent a proximity effect. The needle tip includes a case, a holder disposed in the case and reciprocating in a vertical direction, and a plurality of needle electrodes disposed in the holder, a current being applied to the plurality of needle electrodes. The plurality of needle electrodes include a first group of needle electrodes and a second group of needle electrodes to which the current is applied at mutually different times.