Patent ID: 8607938

Claim:
An electric parking brake comprising: an actuator housing; a parking cable connected to a brake that applies braking force to wheels of a vehicle; a motor generating driving force to operate the parking brake; a reduction gear unit for transferring power of the motor; a screw nut unit including a gear member connected to the gear reduction unit, a nut member connected to the gear member, and a screw member connected to a first parking cable of the parking cable while moving relative to the nut member; and a displacement sensor connected to the nut member of the screw nut unit, wherein the displacement sensor includes a sensor housing, a magnet housing that moves relative to the sensor housing, a magnet elastic member elastically supported between the sensor housing and the magnet housing, a magnet provided in the magnet housing, and a hall IC provided in the sensor housing, wherein the magnet housing includes a coupling part located outside of the sensor housing, and said magnet housing is coupled with a second parking cable of the parking cable or the actuator housing via said coupling part, and wherein the coupling part includes a locking groove formed in an outer peripheral surface of the magnet housing.