A knob device that is used for on -vehicle information amusement equipment

The utility model relates to a knob device that is used for on -vehicle information amusement equipment, inlay locate the equipment panel that has the circuit board on, the circuit board is connected with the knob device, the knob device is including the interior knob of realization size or channel regulation and the outer knob of realizing that the function is selected, interior knob is embedded in outer knob, outer knob border symmetry sets up to treat more selects hole and a pair of activation hole, be provided with function instruction icon corresponding to waiting to select the hole and activate hole department on the equipment panel, interior knob is equipped with the interlock switch with outer knob within a definite time. Compared with the prior art, the utility model has the advantages of save space, improve equipment reliability and security.