rotor 17 it can move only on a circular path about axis c thereof drive spring 16 exerts a torque which varies in magnitude depending on its tensioning state but always acts in the same direction onto drive rotor 17 and thereby on control traveler 46 in clockwise direction in the figures in the assembled state drive rotor 17 is located adjacent to the control track part 45 in such a manner that the control traveler 46 is positioned within a control track 47 of control track part 45 this position of the control traveler 46 is indicated by broken lines in fig8 a relative movement of control traveler 46 with respect to the control track part 45 results on the one hand when the control track part 45 is moved parallel to the longitudinal axis a of the puncturing device 2 and on the other hand by means of the motion of the control traveler 46 on a circular path about axis c the translational motion of control track part 45 results from the coupling thereof with cocking button 14 in the preferred embodiment shown the control track part 45 and the force transmission part 20 with toothed rack 21 are manufactured as one part and are formed approximately u shaped such that in the assembled position the two legs of the u extend on the two sides of drive module 15 i e force transmission part 20 on drive side 42 and control track part 45 on guide side 43 the rear end of components 20 45 which are connected to each other is attached to cocking button 14 such that both parts are moved equally in a translational motion by actuation of cocking button 14 due to the actuation of cocking button 14 and the biasing.