| 摘要 |
PROBLEM TO BE SOLVED: To reduce cost with a simple structure. SOLUTION: A negative pressure type booster, which is provided with a housing, a movable wall, a valve housing, an input member, a first valve mechanism, an output rod, a solenoid valve device 28 for communicating a rear chamber with a front chamber or the atmosphere, and has a restraining member 281 for restraining the communication between the atmosphere and the rear chamber through the solenoid valve device 28, and the restraining member 281 is constituted with a first disk-shaped plate 28p comprising a sintered body of a porous member and a second annular plate 28q comprising a rubber member. |
