Shift-by-wire system

A shift-by-wire system comprising:

• a body configured to have a Hall sensor provided therein;
• a knob configured to rotate around an axis of the body and thus perform shifting to a gear position other than a parking (P) gear position;
• a button assembly including a magnet configured to rotate together with the knob, the button assembly configured to move in an axial direction of the body so as to perform shifting to the P gear position;
• wherein the Hall sensor is configured to sense a rotation and a movement of the magnet,
• wherein the button assembly comprises:
• a button provided at one end of the knob so as to be pressed, and
• a shaft provided in the body in the axial direction and including one end connected to the button;
• and
• a concurrent operation limiting unit configured to:
• mechanically limit movement of the button assembly in a state in which the knob is manipulated so as to be rotated, and
• mechanically limit rotation of the knob in a state in which the button assembly is manipulated so as to be moved,
• wherein the concurrent operation limiting unit comprises:
• operation prevention protrusions formed on side surfaces of the shaft,
• a bullet housing fixed to an inside of the body such that the shaft passes through the bullet housing so as to be rotated and rectilinearly moved relative to the bullet housing;
• and
• operation prevention recesses formed in one end of the bullet housing corresponding to the operation prevention protrusions.

A shift-by-wire system comprising:

• a body configured to have a Hall sensor provided therein;
• a knob configured to be rotatable around an axis of the body;
• a button assembly including a magnet configured to rotate together with the knob, wherein rotated and moved states of the magnet are sensed by the Hall sensor, the button assembly is configured to move in an axial direction of the body and comprises a button provided at one end of the knob so as to be pressed;
• and
• a concurrent operation limiting unit configured to:
• mechanically limit movement of the button assembly in a state in which the knob is manipulated so as to be rotated, and
• mechanically limit rotation of the knob in a state in which the button assembly is manipulated so as to be moved,
• wherein:
• button legs are formed at one end of the button so as to extend towards the body;
• an inner knob is assembled with the knob so as to be surrounded by an inner surface of the knob;
• and
• button leg insertion holes are formed in one end of the inner knob, and the button legs are inserted into the button leg insertion holes so as to restrain movement of the button and the knob relative to each other.