Device to obtain a blood sample

摘要

The device has a control device for controlling penetration and return motion of a lancet (1). The control device comprises an advance phase with which the lancet is pierced up to a maximum penetration depth, and a return phase with which the lancet is partially retracted up to a retraction depth. An oscillating weight i.e. hand wheel (11), is coupled to a connecting rod (7) such that advancement of the lancet displaces the weight in motion and causes return motion of the lancet after reaching the maximum depth of motion energy stored in the weight.