DISPOSABLE LANCET DEVICE FOR PUNCTURING SKIN

PCT No. PCT/SE92/00288 Sec. 371 Date Oct. 18, 1993 Sec. 102(e) Date Oct. 18, 1993 PCT Filed May 5, 1992 PCT Pub. No. WO92/19164 PCT Pub. Date Nov. 12, 1992.A device for obtaining blood comprising a rod (1) with a lancet (5), a sleeve (2), a stop (9, 15) which temporarily prevents insertion of the rod into the sleeve in a starting position in which the lancet is located in the sleeve, and two spring tongues (16, 17) which abut against the rod so that the lancet is centred and retracted into the sleeve with the aid of the spring force in the tongues. According to the invention the tongues are defined by axial slits (23) in the wall of the sleeve, whereby the tongues extend obliquely into the sleeve with their ends (19) located inside the front end (14) or an orifice ring of the sleeve. The distance between the ends of the tongues when the rod assumes said starting position, is less than the thickness of the rod at the lancet end, and the tongues are arranged to cooperate with the lancet end upon movement of the lancet.