Patent ID: 7757823

Claim:
An electric parking brake comprising: a housing defining an outer appearance of the parking brake; an actuator mounted at one side of the housing to perform forward and reverse rotations; a gear box assembly having gears to reduce a rotating force generated from the actuator; a driven gear provided in the gear box assembly to transmit the reduced rotating force; a spindle having screw threads engaged with the driven gear; a screw nut having a coupling hole to be screwed to the spindle; an equalizer through which the spindle is penetrated and the screw nut is rotatably inserted; brake cables connected to opposite sides of the equalizer, respectively, each brake cable having a first end formed with a coupling piece for the connection of the equalizer and a second end connected to an associated one of wheel brake devices; and an emergency release device comprising at least one cam unit and at least one operating lever, the emergency release device being adapted to slacken the brake cables in an emergency release situation, so as to release the parking brake; wherein the emergency release device further comprises protrusions integrally extended from a casing of a force sensor; wherein the at least one cam unit comprises a plurality of cam units adapted to be normally caught by the protrusions, respectively, so as to support the force sensor at a fixed position and to be rotated in an emergency release situation so as to be released from the protrusions; and wherein the at least one operating lever comprises a plurality of operating levers, each operating lever having one end coupled to an associated one of the cam units by use of a shaft fitted in a hole of the associated cam unit and adapted to rotate the associated cam unit in an emergency release situation.