| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative pressure type assistor, capable of reducing noise which is generated when stepping down of a brake pedal which is being stepped down, is released, without increasing cost and reducing productivity.SOLUTION: A valve body 41 of a negative pressure type assistor comprises: a movement stop part 41c which is integrated to any one of a fitting part 41a and a movable part 41b, and which relatively stops the movable part 41b which moves with movement of a plunger 32, with respect to a valve body 22, at a time point after an input operation to an input shaft 31 is released, and at a time point before a contact time point when a key member 39 moving with movement of the plunger 32 and the valve body 22 contact each other.SELECTED DRAWING: Figure 1 |
