Patent ID: 7811302

Claim:
A lancet device ( 10 ) for puncturing the skin ( 11 ) of mammals, comprising: a punch element ( 12 ); a manipulator ( 13 ) operably connected to the punch element; a bushing element ( 14 ) having a grip ( 15 ) and an interior ( 28 ) in which the punch element ( 12 ) is axially displaceably disposed; the punch element ( 12 ) having a lancet ( 18 ) provided with a sharp tip ( 19 ) for deliberate entering of the skin ( 11 ) on a free end ( 17 ) thereof pointing away from the manipulator ( 13 ), wherein, by means of a force acting in a lancing direction along a longitudinal axis ( 16 ), away from the manipulator, the lancet ( 18 ), via the punch element ( 12 ), can be made to extend outward from a free end ( 21 ) of the bushing to enter the skin ( 11 ) with a preadjustable momentum; and including blocking means which prevents the possibility of reentry of the lancet ( 18 ) into the skin ( 11 ) once the lancet ( 18 ) has previously entered the skin ( 11 ), said blocking means comprising: a sleeve element ( 35 ) disposed in an axially slidable relationship in the interior ( 28 ) of the bushing element ( 14 ), and which includes a first sleeve projection ( 38 ), oriented radially inwardly towards the longitudinal axis ( 16 ), wherein a first punch projection ( 24 ) defined on the punch element and oriented radially outwardly from the longitudinal axis ( 16 ) slidingly passes and locks beyond the first sleeve projection ( 38 ) during entry of the lancet ( 18 ) into the skin ( 11 ) and upon reentry of the lancet ( 18 ) into the end ( 21 ) of the bushing, the first punch projection ( 24 ) engages the first sleeve projection ( 38 ) to axially displace the sleeve element ( 35 ) in the axial direction ( 34 ) towards the manipulator ( 13 ).