Command device, intended to be mounted on an interface panel of an electrical appliance, comprising: - a knob, which is rotatably movable around a rotation axis; - a rotary support shaft, fixed at a first end to said knob, coaxially with respect to said rotation axis; - a control device associated with the second end of said support shaft and fixed with respect to the latter in order to detect the angular position thereof; wherein said support shaft comprises at least one damping portion made of elastically pliable material, susceptible of elastic response to bending stresses transverse to said rotation axis that are transmitted by said knob; said knob having a concave form, at whose interior said damping portion is substantially positioned, coaxially with respect to said rotation axis; wherein said command device comprises support means adapted to rotatably support said support shaft on the interface panel of said electrical appliance, characterized in that the support means comprise: - at least one glass-shaped body provided with a concavity directed towards said knob; - a support body, fixed within the concavity of said glass-shaped body and provided with a through duct traversed by said support shaft. - a knob, which is rotatably movable around a rotation axis; - a rotary support shaft, fixed at a first end to said knob, coaxially with respect to said rotation axis; - a control device associated with the second end of said support shaft and fixed with respect to the latter in order to detect the angular position thereof; wherein said support shaft comprises at least one damping portion made of elastically pliable material, susceptible of elastic response to bending stresses transverse to said rotation axis that are transmitted by said knob; said knob having a concave form, at whose interior said damping portion is substantially positioned, coaxially with respect to said rotation axis; wherein said command device comprises support means adapted to rotatably support said support shaft on the interface panel of said electrical appliance, characterized in that the support means comprise: - at least one glass-shaped body provided with a concavity directed towards said knob; - a support body, fixed within the concavity of said glass-shaped body and provided with a through duct traversed by said support shaft. wherein said support shaft comprises at least one damping portion made of elastically pliable material, susceptible of elastic response to bending stresses transverse to said rotation axis that are transmitted by said knob; said knob having a concave form, at whose interior said damping portion is substantially positioned, coaxially with respect to said rotation axis; wherein said command device comprises support means adapted to rotatably support said support shaft on the interface panel of said electrical appliance, characterized in that the support means comprise: - at least one glass-shaped body provided with a concavity directed towards said knob; - a support body, fixed within the concavity of said glass-shaped body and provided with a through duct traversed by said support shaft. - at least one glass-shaped body provided with a concavity directed towards said knob; - a support body, fixed within the concavity of said glass-shaped body and provided with a through duct traversed by said support shaft.