Abstract: A device for puncturing skin in a reciprocal manner includes a reciprocally movable needle, a driving device including a driving mechanism and a driving rod arranged for driving the reciprocally movable needle between a retracted and extended position. The driving mechanism is arranged for reciprocally driving the driving rod in a longitudinal direction along the longitudinal axis of the driving rod. The driving device further includes a suspension system arranged between a frame member of the driving device and the driving rod and the suspension system is arranged for elastically suspending the driving rod in the longitudinal direction in the frame such that the driving rod is freely movable in longitudinal direction. The suspension system is further arranged for biasing the driving rod to a longitudinal neutral position.

Abstract: Needle module for puncturing skin in a reciprocal manner. The needle module includes a needle unit, a housing and a biasing mechanism. The needle unit includes a needle. The needle unit is movable with respect to said housing between an extended position wherein a distal end of the needle extends from a distal end of said housing and a retracted position wherein the distal end of the needle is positioned within the housing. The biasing mechanism is arranged for urging the needle unit towards the retracted position. The needle module further includes a limiting mechanism. The limiting mechanism is arranged for limiting the relative movement of the needle unit out of the distal end of the housing to a maximum extension distance when moving towards the extended position. The maximum extension distance is 1.5 mm or less.