Handheld device for repeated puncture of human or animal skin

A handheld device for repeated local puncture of human or animal skin, comprising:

• a housing on which a handle is formed,
• a drive device which is arranged in the housing and with which a rotating movement about an axis of rotation is supplied via a driveshaft,
• a conversion mechanism which is coupled to the driveshaft and is arranged in the housing and set up to convert the rotating movement into a driving movement along a driving movement direction, and
• a puncture device which is arranged in the housing and comprises a puncture element, which is arranged on a needle shaft that can be moved back and forth repeatedly along a path of movement together with the puncture element and is connected to the conversion mechanism,
• wherein the conversion mechanism has a rod crank device, and a stroke executed by the puncture element in moving back and forth is adjustable by altering a relative position between an axial direction of the axis of rotation and the direction of the driving movement.