Calibrating device for a balance

A balance including a load receiving unit for loads to be weighed, a load measuring unit and a lever mechanism for transmitting force between the load receiving unit and the load measuring unit, the lever mechanism being coupled to the load receiving unit through a coupling area on an input side and to the load measuring unit through a coupling area at an output side, the balance further including a calibrating device comprising an additional coupling area for releasably coupling a calibrating force which is uncoupled during normal weighing operations to the lever mechanism, the additional coupling area being separate from the coupling areas on the input side and the output side, a parallelogram guide means comprising two parallel guide members having first and second ends, a deflectable member for connecting the first ends of the guide member and a stationary member for connecting the second ends of the guide members, the deflectable member being guided so as to be movable parallel to a calibrating force direction and being configured for releasably coupling the calibrating force, the additional coupling area being connected to the deflectable member and the parallelogram guide means being separate from the load receiving unit, wherein a portion of the deflectable member extends between the guide members, wherein the portion of the deflectable member extending between the guide members is over at least sections thereof separated from the guide members by a material-free area in the form of a thin cut line, and wherein the support unit is arranged between the bending point defined by the material-free area in the form of a thin cut line and the bending point opposite the bending point defined by the material-free area in the form of a thin cut line.