The device comprises a body ( 2 ) and placed therein a needle assembly ( 1 ) and a push button ( 3 ) located in the upper portion of the body ( 2 ), whereas the needle assembly ( 1 ) has in its lower portion a sheathed piercing needle ( 5 ), and the push button ( 3 ) has in its upper portion a press surface, and between the body ( 2 ) and the needle assembly ( 1 ) a return spring ( 27 ) is placed. The push button ( 3 ) is coupled with the needle assembly ( 1 ) by means of abutting surface elements ( 15 , 44 ), whereas during the movement of the push button ( 3 ) and after resting the needle assembly ( 1 ) on the element ( 20 ) of the body ( 2 ) and after performing the full-depth piercing, one of the abutting surface elements ( 15 , 44 ) bends, releasing the needle assembly ( 1 ) from the thrust of the push button ( 3 ), whereupon the needle assembly ( 1 ) retracts to the inside of the body by means of the return spring ( 27 ). The return spring ( 27 ) consists of plastic flat springing beams, preferably "L" or "U" shaped, whereas at least one end the return spring ( 27 ) is connected with the body ( 2 ).본 발명은 진단을 위해 혈액 샘플을 채취하기 위한 환자용 피부천자기에 관한 것으로, 몸체, 몸체 안에 위치하는 바늘조립체 및 몸체 윗부분에 위치하는 푸시버튼을 포함하고, 바늘조립체 하부에 케이스에 쌓인 바늘이 위치하며, 푸시버튼의 상부에 누름면이 있고, 몸체와 바늘조립체 사이에 스프링빔이 위치하며, 푸시버튼에 잠금아암이 달려있고, 이 잠금아암은 몸체에 얹혀져 있는 바늘의 케이스와 맞닿아 있으면서 케이스를 벗기기 전에는 바늘이 안으로나 밖으로 밀리거나 당겨지지 않도록 한다.
