Burn-off contact arrangement

Abstract

A switching arrangement having a large burn-up reserve, contact fingers (,) are connected to a first electrical terminal via flexible bands (,) consisting of strips of, for example, copper which lie one above the other. The connecting portion (,) of the band (,), the said connecting portion adjoining the contact fingers (,) and being rigidly connected to them, is reinforced in each case by pressure welding of the strips. In the switch-off state, the bands (,) and, in part, the contact fingers (,) bear on an outwardly pointing supporting face (,), whilst, in the switch-on state, at least the contact fingers (,) and connecting portions (,) are lifted off from the supporting face (,), with the bands (,) being bent at the same time, as a result of contact with the outside of a switching pin (,) displaceable along a switching axis (,). The pressure force caused by electromagnetic attraction between the relatively short contact fingers (,) and the connecting portions (,), which in each case form an angle of approximately 30° with the switching axis (,), approximately compensates the contact lift-off forces, whilst the forces acting on the flexible parts of the bands (,) are absorbed essentially by the supporting face (,).