Abstract: An operating structure of an electrical switch is an assembly comprising a contact arm part, a fixed contact part and an insulating part preferably sandwiched therebetween. The contact arm part and the fixed contact arm are made of electrically conducting material. The insulating part is preferably of a thermoplastic material. The contact arm part and the fixed contact part are provided each with two securing holes. To assemble the three parts, the material of the insulating part in its portions associated with the securing holes is locally brought into a plastic state and bulged out through the securing holes. Then, the bulges are flattened, clinched or the like, at the other side to form a structure which is joined by quasi-rivets of plastic. The manufacture of this structure takes place in a timed sequence with suitable stamping and forming tools.