Brake device

A brake device comprising:

• a braking member that is pressed against a drum rotor that rotates integrally with a wheel to brake the drum rotor;
• a backing plate that supports the braking member;
• and
• an electric actuator that is provided on the backing plate and that actuates the braking member, wherein
• the electric actuator includes,
• a motor having a rotating output shaft,
• a motion conversion mechanism including a rotation member that includes a male screw and rotates about an axis center of the male screw in conjunction with the output shaft, and a linear motion member that includes a female screw that meshes with the male screw and linearly moves accompanying the rotation of the rotation member,
• an actuating member that receives a force for actuating the braking member from the linear motion member, and
• a guide member that guides the actuating member;
• the rotation member is rotationally driven through a driven part that is provided on an outer periphery of the rotation member and rotates in conjunction with the output shaft;
• the male screw and the female screw mesh with each other on a side opposite to the braking member of the driven part;
• the actuating member is configured such that one end receives a force for actuating the braking member from the linear motion member and the other end actuates the braking member;
• the rotation member is provided with a through-hole that lies along an axial direction of the axis center;
• the actuating member passes through the through-hole;
• the one end of the actuating member is arranged on a side opposite to the braking member of the through-hole;
• and
• the guide member is made of a material different from the rotation member and slidably guides the actuating member in the axial direction.