Drum brake type electric parking brake apparatus

摘要

There is provided a drum brake type electric parking brake apparatus includes an electric actuator unit (5), a backing plate (2) and a knuckle (1). The electric actuator unit includes an electric motor (19) and a decelerator (20), and expands a gap between end portions of brake shoes (3) based on activation of the electric motor. The electric actuator unit is separately provided from the backing plate. The electric actuator unit is arranged at an inner-side surface of the knuckle, and the backing plate is arranged at an outer-side surface of the knuckle. The backing plate and the electric actuator unit are supported and fixed to the knuckle.