Patent ID: 7870810

Claim:
A rotary knob for an electrical system, comprising: a body; a rotary maneuvering member mounted on the body in a fluid-tight manner; and a driving part housed in the body and provided with cam surfaces on a circumference thereof, wherein the maneuvering member includes a shank for moving the driving part, the body supports at least one electrical block being switchable in response to a rotation of the maneuvering member via at least one axially moving slider disposed around the cam surfaces of the driving part, the maneuvering member is mounted in a rotary manner about an axis with a limited angular movement, in order to assume at least two functional positions, and is locked in rotation with the driving part provided with the cam surfaces for moving the sliders, the body of the knob includes a hollow part provided with an external cylindrical flange, an internal cylindrical sleeve and a cup defined between the flange and the sleeve, the cup houses either a helical spring acting on a sensitivity ring separate from the driving part and movable in translation or a torsion spring acting on the maneuvering member, and the cylindrical sleeve defines a central opening with which a centering seat of the shank of the maneuvering member cooperates.