Blood lancet device for withdrawing blood for diagnostic purposes

摘要

Blood lancet device for obtaining blood samples for diagnosis purposes, in which a lancet holder (6) movable along a predetermined straight puncturing path and containing a lancet (34) is moved with the aid of a lancet drive (3) in a housing (1) until the tip (35) of the lancet emerges from the emergence opening (84) in order to produce a wound in a body part resting against the emergence opening (84). The lancet holder (6) is also used for returning the lancet (34) into a position in which the tip (35) is located in the housing (1) again. In order to permit puncturing to be carried out with as little pain as possible the lancet drive (3) has a rotary slide gear (4) whose input side (16) is formed by a gear member which can be rotated about an axis of rotation (A) parallel to the predetermined puncturing path. This gear member (5) on the input side of the rotary slide gear is coupled to the elastic drive element (9) of the lancet drive (3) and converts a torque transmitted to the gear member (5) into a longitudinal displacement in the direction of the predetermined puncturing path which is transmitted to the lancet holder (6).