Steering wheel locking device

A steering wheel locking device, which is attached to a smart ignition system to lock a steering shaft, the device comprising:

• a rotor, which has a key insertion portion, wherein the rotor is rotated between a locked position and an actuation position;
• a switch knob for rotating the rotor, wherein the switch knob is coupled to the rotor and rotates integrally with the rotor, wherein the switch knob can axially move from a manipulation prohibited position to a manipulation allowable position with the rotor while the rotor is arranged at the locked position, wherein the manipulation prohibited position prohibits the rotation of the switch knob, and the manipulation allowable position allows the rotation of the switch knob, wherein, when the switch knob is depressed at the manipulation prohibited position, the switch knob moves to the manipulation allowable position, and wherein the rotor can be rotated from the locked position to the actuation position while the switch knob is arranged at the manipulation allowable position;
• a locking mechanism for locking the steering shaft, wherein the locking mechanism includes a locking member, wherein the locking member can be shifted between a shaft locking position, at which the locking member engages with the steering shaft to restrict the rotation of the steering shaft, and a shaft unlocking position, at which the locking member does not restrict the rotation of the steering shaft;
• an unlock maintaining mechanism, wherein, when the rotor is rotated from the locked position to the actuation position, the unlock maintaining mechanism maintains the locking mechanism unlocked, and the unlock maintaining mechanism further includes a movable body, wherein the movable body is moved by a key inserted in the key insertion portion, and wherein, when the rotor is rotated from the actuation position to the locked position, the unlock maintaining mechanism maintains the locking mechanism unlocked by the engagement of the key and the movable body.