Blood lancet device for the removal of blood for diagnostic purposes

摘要

Blood lancet device (2) for the removal of blood for diagnostic purposes. It has a housing (1) with an outlet opening (8) for the tip (7) of a lancet (6) and a lancet drive (5) with one of a drive spring (17) driven in a direction of rotation (28) rotatable drive rotor (16), by means of which the relief motion of the drive spring (17) is converted into a needle-penetration movement, in which the lancet (6) with a high speed in the needle-penetration direction (14) is moved, until its tip (7) from the outlet opening (8) exit. Dollars a by a precise and with little penetration behavior with reduced manufacturing expenditure to achieve, it is proposed that the drive rotor a radially outwardly directed pressure surface (23) which, in a varying distance between axes of such about the axis of rotation (15), that it comprises an apex (29) with a maximum distance between axes and a the apex (29) against the direction of rotation (28) following section of driving (30) with opposite the direction of rotation (28) has a decreasing distance, the drive spring (17) a pressure on the section of driving (39) of the pressure surface (23), by means of which the drive rotor (16) in the direction of rotation (29) is driven, and the drive rotor (16) with the lancet holder (3) is coupled.