Patent ID: 6966615

Claim:
A hydraulic braking pressure generating apparatus for a vehicle comprising: a hydraulic pressure generator for generating a predetermined hydraulic pressure irrespective of a braking operation of a brake operation member and for outputting the predetermined hydraulic pressure, an input member moved in response to the brake operation member, a first elastic member for transmitting a brake operation force applied to the input member and for applying a stroke corresponding to the brake operation force to the input member, a regulation valve for regulating the outputted hydraulic pressure of the hydraulic pressure generator in response to the brake operation force transmitted through the first elastic member and for outputting a regulated hydraulic pressure, a second elastic member for urging the regulation valve toward its initial position, wherein a mounting load of the first elastic member is set larger than a mounting load of the second elastic member; and wherein the spring constant of the second elastic member is set such that the mounting load of the first elastic member is smaller than a load of the second elastic member at which the regulation valve opens.