Patent ID: 8561763

Claim:
A brake device comprising: a first friction member that includes a first friction surface; and a second friction member that includes a second friction surface moving relative to the first friction surface, wherein the first friction surface includes a plurality of first convex portions that is elastically supported in a direction perpendicular to the second friction surface, the second friction surface includes a plurality of second convex portions that is disposed in a direction where the second friction surface moves relative to the first friction surface, when the second friction surface moves relative to the first friction surface, the first convex portions continuously come into contact with the second convex portions, respectively, while being displaced in a direction perpendicular to the second friction surface, and after coming into contact with a first one of the second convex portions, a first one of the first convex portions comes into contact with a second one of the second convex portions, at a position lower than an apex of the second one of the second convex portions.