| 摘要 |
A braking device includes a guide piston (103) which surrounds the outer periphery of a rod part (89a) of a second slave piston (88a), a cup seal which is mounted on the second slave piston (88a), and a seal member (103b) which is provided on the guide piston (103). The second slave piston (88a) includes an enlarged diameter portion (117) which comes into contact with an axial-direction surface (119) of the guide piston (103) when the second slave piston (88a) is in the initial position, and the enlarged diameter portion (117) is provided with a cut-out section (121) which extends in the internal diameter direction of the second slave piston (88a). |
