| 摘要 |
PROBLEM TO BE SOLVED: To perform proper air bleed during the filling of brake oil, and to facilitate the attaching of a hydraulic pressure sensor or the like when the hydraulic pressure sensor is attached to the hydraulic brake device of a vehicle and pressure detection is carried out. SOLUTION: This attaching structure is provided with a hydraulic pressure detection room 2 provided in a master cylinder 1 so as to be positioned in the lower side of the pressure chamber 11 of the brake master cylinder 1, and a hydraulic pressure sensor 4 attached to the brake master cylinder so as to detect the pressure of the hydraulic pressure detection room 2. The hydraulic pressure detection room 2 and the pressure chamber 11 are connected to each other via a plurality of flow paths 3a and 3b formed to be smaller in diameter than the hydraulic pressure detection room 2.
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