Electric steering lock device

摘要

An electric steering lock device which can prevent a motor from being overloaded and can increase the drive force of the motor. The electric steering lock device ( 10 ) of the present invention has a lock bar ( 32 ) which moves according to the movement of a cam follower ( 22 ). The cam follower relatively moves in a spiral cam groove ( 21 ) in accordance with the rotation of a rotary plate ( 20 ) driven by an electric motor ( 11 ), thereby the cam follower moves along the radial direction of the rotary plate. The cam follower can be disengaged from the cam groove via the end portions ( 21 a, 21 b) of the cam groove according to the rotation of the rotary plate. When the cam follower is disengaged from the cam groove, the rotation of the rotary plate is permitted.