Electric device for evaporating substances

An electric device for evaporating substances, perfumes or the like, comprising a housing adapted to receive a receptacle containing said substance, an electric printed circuit board for a heating element said board being supported in said housing and a toggle switch including an actuation element which is adapted to be pivoted by a defined angle between two positions, a switching element for interrupting and for establishing an electrically conductive connection between two contacts and a resilient element co-operating with said switching element and said actuation element in such manner that the switching element takes up two stable switching positions and has unstable positions between the two stable ones, wherein said switching element and the resilient element are implemented as an integral strip-shaped sheet-metal spring, one end of said spring being held between two driving pins of the actuation element and the other end of said spring abutting one of said two contacts, said strip-shaped sheet-metal spring including a 3/4-circular bend which is adapted to be brought into abutment with the other contact by pivoting the actuation element.