Patent ID: 8689947

Claim:
A disc brake device, comprising: a disc rotor that rotates around a rotation axis; a friction pad that opposes to a friction face of the disc rotor; a cylinder that supports the friction pad as being capable of closing to and departing from the friction face of the disc rotor; a piston supported by the cylinder and capable of pushing the friction pad to the disc rotor as moving frontward during pressurization; a movable element arranged between the cylinder and the piston and movable frontward in the same direction of the piston; a following unit that is elastically arranged between the piston and the movable element and makes the movable element accompany the piston; and an elastic unit compressively deformable with pressurization of the piston via the movable element, wherein a start load of the piston is set to be larger than a start load of the movable element, the piston and the movable element are supported to be relatively movable when a predetermined load set in advance is exerted, and the elastic unit includes a low elasticity unit compressively deformable with initial pressurization of the piston via the movable element, and a high elasticity unit compressively deformable with pressurization of the piston via the movable element and having elastic force higher than that of the low elasticity unit.