| 摘要 |
PURPOSE: To downsize and simplify a sensor to detect whether a negative pressure type booster is put in a restoration stopping condition or in any actuating condition. CONSTITUTION: A contact condition of an air valve 51 and a sealing part 53a of a control valve 53 is electrically detected by using conductive rubber in the sealing part 53a of the control valve 53. Conductive rubber 46 to allow shaft directional movement of a stopper 45 to a cylinder member 23 is arranged between the stopper 45 and the cylinder member 23, and a contact condition of this conductive rubber 46 and the stopper 45 is electrically detected. |
