| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum type booster suppressing leakage from airtightness in a valve member. SOLUTION: A vacuum type booster is provided with a housing, movable walls for separating constant pressure chambers from variable pressure chambers, a power piston 10, an input member 12, a control valve 19, a reaction member 15 for applying reaction to the input member 12, and an output member for outputting the thrust of the piston 10 to the outside of the booster through the reaction member 15. In this case, the input member 12 has a first input member 13 and a second input member 14, and at least either one of the contact face 13b of the first input member 13 and the contact face 14a of the second input member 14 is formed in almost spherical shape. |
