Patent ID: 8052707

Claim:
A patient's skin puncturing device, for collecting a blood sample for diagnostic purposes, comprising: a housing having a first end and a second end, a lancet slidably positioned inside said housing and having a body with a sheathed puncturing needle seated therein, and a push button positioned at end of said housing, whereas between a face end of said push button and said lancet body a drive spring is placed as directly contacting said face end of said push button at a first end of said drive spring and contacting said lancet body at a second end of said drive spring, and between the second end of said housing, which is provided with an opening for said puncturing needle, and said lancet body a return spring is placed, and between said housing and said lancet body a lancet actuation locking means is placed, and for precluding said drive spring from following said lancet in a puncture phase and in a retraction phase of said lancet said puncturing device has a drive spring catching means which is integrally formed with an additional separate element of said puncturing device, wherein the second end of the drive spring is spaced apart from the drive spring catching means at a start of the puncture phase, wherein said drive spring contacts said lancet body during the start of the puncture phase, pushes said lancet body in a longitudinal puncturing direction during the puncture phase, and separates from the lancet body when the drive spring contacts the drive spring catching means during the puncture phase, such that said lancet body continues in the longitudinal puncturing direction while said second end of said drive spring remains stationary against the drive spring catching means with the drive spring under partial tension.