Patent ID: 8801740

Claim:
A lancing device for sampling blood or other body fluid comprising: a housing having an open tip end; an operation mechanism for advancing a lancet from inside the housing toward the tip end of the housing; and a lancing adjustment mechanism including an operation member which is operated for adjusting a lancing depth of the lancet into a target portion upon a maximum forward movement of the lancet by the operation mechanism; wherein the lancing adjustment mechanism provides a nonlinear relationship between the lancing depth of the lancet and an operation amount of the operation member; and wherein the lancing depth adjustable mechanism selectively provides a first lancing state in which a tip end of the lancet projects out beyond the tip end of the housing upon the maximum forward movement of the lancet and a second lancing state in which the lancet does not project out upon the maximum forward movement of the lancet, the lancet in the second lancing state sticking into the target portion bulging into the open tip end of the housing, the lancing depth varying at a lower rate for a given operation amount of the operation member in the second lancing state than in the first lancing state; wherein the operation mechanism advances the lancet to the lancing depth adjusted by the operation member of the lancing adjustment mechanism.