| 摘要 |
Disclosed is a parking brake device. According to the present invention, the parking brake device comprises: a housing; a gear unit which is installed inside the housing, and operates by the operation of a motor unit; a nut screw which is connected with the gear unit, and rotates according to the operation of the gear unit; a bolt screw having a pin protruding from an outer periphery, and moving in a straight-line in the lengthwise direction while penetrating the nut screw; a piston unit which is installed inside the housing to slide, receives bolt screw, and has a guide rail formed to guide the pin in the lengthwise direction, wherein the piston unit is formed adjacent to the nut screw, and has a pin receiving space unit which has a space where the pin can rotate. |
