Patent attributes
A shift-by-wire system physically prevents shifting to the R/N/D gear position and shifting to the P gear position from being simultaneously performed. The shift-by-wire system includes a body configured to have a Hall sensor provided therein, a knob installed so as to be rotatable around an axis of the body, a button assembly moving in an axial direction of the body and having a magnet provided to sense rotated and moved states thereof using the Hall sensor and rotate together with the knob, and a concurrent operation limiting unit to mechanically limit movement of the button assembly in a state in which the knob is manipulated so as to be rotated, and to mechanically limit rotation of the knob in a state in which the button assembly is manipulated so as to be moved.