Abstract: The present invention relates to an electric parking brake apparatus. According to an embodiment of the present invention, a worm shaft is formed with a first protrusion, a rotating member is formed with a second protrusion, and after the rotating member rotates by a preset rotation angle, the first protrusion of the worm shaft contacts the second protrusion of the rotating member so that the worm shaft cannot rotate any more, thereby preventing a gear jam due to over-release of the rotating member.

Abstract: A electronic parking brake which includes a drum rotated together with a wheel of a vehicle, first and second brake shoes installed in both inner sides of the drum to brake the drum, and an operation lever configured to support the two brake shoes and to push the two brake shoes toward an inner surface of the drum when a rotational lever is pulled, includes an actuator configured to generate a driving power driving the rotational lever, wherein the actuator includes a motor configured to be rotated forwardly and reversely and to generate a driving power for braking, a decelerator configured to amplify the driving power generated from the motor, and a power conversion unit configured to receive a rotational force from the decelerator and convert the rotational force into a linear motion.

Abstract: The present invention relates to an electric parking brake apparatus. According to an embodiment of the present invention, a worm shaft is formed with a first protrusion, a rotating member is formed with a second protrusion, and after the rotating member rotates by a preset rotation angle, the first protrusion of the worm shaft contacts the second protrusion of the rotating member so that the worm shaft cannot rotate any more, thereby preventing a gear jam due to over-release of the rotating member.