Abstract: A device for conversion of a rotational movement into a movement of each of two working levers defining a truncated cone and a self-rotating movement of each of the two working levers and vice versa comprises a lever bearing element which is rotatable around a rotation axis. The two working levers are each self-rotatably positioned around a self-rotation axis in the lever bearing element. A planetary wheel is arranged in a non-rotatable manner on each working lever. The planetary wheels are each coupled to a sun wheel, which is able to be blocked from turning, via a transmission wheel, the sun wheel being arranged around the rotation axis. This device for conversion of movement is utilisable for a great variety of uses and has a simple mechanical construction.