TIP USING DRUG INJECTION HANDPIECE AND SKIN TREATING DEVICE

摘要

The present invention provides a drug injection tip capable of infiltrating a needle into a deep part of the skin by a predetermined depth and injecting a drug into the skin through a hole formed by the needle; a handpiece with a drug injection tip mounted thereon; and a skin treatment device using the tip. According to the present invention, the drug injection tip comprises: a cylinder; a plunger reciprocating from an upper side to a lower side and forming first and second spaces in the cylinder; and the needle disposed in the plunger and disposed in the second space of the cylinder. When the plunger moves down, the needle is inserted into the skin and the second space becomes a negative pressure state. When the plunger moves up, the needle is withdrawn from the skin and the second space becomes a positive pressure state.