Patent ID: 8028552

Claim:
A structure of an automobile electronic key for security, comprising: an ignition knob body provided at the front of a key cylinder into which a car key is inserted; an ignition knob rotator provided at the front of the ignition knob body and including an actuator operating according to a driving signal; a rotation axis located inside the ignition knob body in parallel with the axial direction of the key cylinder; a connecting part located in the ignition knob body and at the back of the rotation axis and adapted to connect the key cylinder and the ignition knob body, the ignition knob body including a locking hole located at the front of the connecting part inside the ignition knob body; a locking member located inside the ignition knob rotator on one side of the central axis of the key cylinder and adapted to be moved by the actuator in parallel with the axial direction of the key cylinder from or into the locking hole such that the car key is switched to a rotatable state or unrotatable state according to the position of the locking member with the locking hole; and a controller for generating the driving signal and performing authentication on a key fob and driving the actuator according to whether the key fob passes authentication to move the locking member such that the car key is switched to the rotatable state or the unrotatable state, wherein the controller is configured to perform authentication on the key fob by determining whether at least one of a driver seat door closing signal and a brake pedal signal is on, requesting the key fob of an automobile to send an ID thereof and receiving the ID from the key fob, and authenticating the key fob using the received ID, and wherein the ignition knob body is separated from the key cylinder and combined with the key cylinder according to the car key inserted into the key cylinder.