A patient's skin puncturing device, particularly for collecting a blood sample for diagnostic purposes, including a housing, a lancet slidably positioned inside the housing and having a body with a sheathed puncturing needle seated therein, and a push button positioned at the one end of the housing. Between a face end of the push button and the lancet body a drive spring is placed, and between the other end of the housing, which is provided with an opening for the puncturing needle, and the lancet body a return spring is placed. Between the housing and the lancet body is placed a lancet actuation lock, preferably in the form of interlocks of a washer. The device has a drive spring catch, preferably in the form of grabs of the washer, to preclude the drive spring from following the lancet in the puncture phase and in the retraction phase of the lancet.본 발명은 진단을 위해 혈액샘플을 채취하기 위한 피부천자기에 관한 것으로, 푸시버튼의 선단부와 란셋 본체 사이에 위치한 구동스프링은 푸시버튼의 선단부와 란셋 본체에 직접 접촉하고, 바늘이 출입하는 구멍이뚫려있는 하우징의 타단부와 란셋본체 사이에 복귀스프링이 배치되며, 하우징과 란셋본체 사이에는 란셋작동 잠금수단이 배치되고, 바늘을 찌르고 란셋이 후퇴할 때 구동스프링은 란셋을 따라가지 않도록 하는 구동스프링 걸쇠수단이 별도의 부품에 일체로 형성되어 있다.
