Electronic parking brake device

An electronic parking brake device comprising:

• a plate part having a brake shoe rotatably mounted thereon;
• a housing part mounted on the plate part and configured to guide hydraulic pressure;
• a motor part mounted on the housing part, and driven when power is applied thereto;
• a piston part mounted on the housing part, and configured to be moved by hydraulic pressure so as to operate the brake shoe, the piston part comprising a pair of piston rod parts inserted into the housing part;
• and
• an operation part embedded in the housing part, disposed between the piston rod parts, and driven by the motor part so as to push the piston rod parts,
• wherein:
• the piston part further comprises:
• a piston support part formed at one end of each of the piston rod parts, and supporting the brake shoe;
• and
• a pair of piston transfer parts, each formed at the other end of each of the piston rod parts, such that the operation part is inserted into the piston transfer parts, and configured to transfer a rotational force of the operation part;
• and
• the operation part comprises:
• a pair of operation pressurization parts, and each of bottoms of the operation pressurization parts is rotated to be away from each other to push the piston rod parts;
• and
• an operation restoration part configured to provide a restoring force to the pair of operation pressurization parts;
• and
• the pair of operation pressurization parts are inserted into the respective piston transfer parts.