PURPOSE: A liquid injecting apparatus is provided to smoothly perform liquid injection task without a separate lighting device in a place in which the indoor illumination is dark.CONSTITUTION: A liquid injecting apparatus comprises: a needle unit (10) in which a needle for injecting liquid into the skin is equipped a housing (30) consisting of a cylindrical form in which the needle unit is detachably combined with a leading end a drive motor (70) which is inserted into the housing a first guide member and a second guide member (40, 50) which are arranged within the housing and detachably connected to each other and a movable unit (60) which receives driving force from the drive motor and performs rotary motion and linear reciprocating motion in the first guide member and the second guide member at the same time. The first guide member and second guide member form a spiral cam groove (G) by each end of the first guide member and second guide member which face each other in the interconnection. The movable unit includes a cam projection which is slidably moved according to the spiral groove.COPYRIGHT KIPO 2013액체주입장치가 개시된다. 개시된 액체주입장치는 피부에 액체를 주입하기 위한 바늘을 구비한 바늘유닛 상기 바늘유닛이 선단에 분리 가능하게 결합되는 통 형상으로 이루어진 하우징 상기 하우징 내에 삽입되는 구동모터 상기 하우징 내에 배치되며, 상호 분리가능하게 연결되는 제1 및 제2 가이드부재 및 상기 구동모터로부터 구동력을 전달받아 상기 제1 및 제2 가이드부재 내에서 회전운동 및 직선왕복운동을 동시에 행하는 가동유닛을 포함하는 것을 특징으로 한다.
