A reservoir tank has an overhanging portion hanging over a master cylinder toward a front side of a vehicle. The guide member has a fixed portion to be fixed to the master cylinder, and an extending portion extending toward the front side of the vehicle from the fixed portion and overlapping the overhanging portion in a vehicle up-down direction. Moreover, the overhanging portion has a rib portion protruding toward a lower side of the vehicle, and at least part of this rib portion overlaps the extending portion in a vehicle front-rear direction.

A dual input master cylinder, comprising a housing having a first input, a piston base positioned within the housing, and a piston rod having a first end and a second end, the first end of the piston rod abutting the piston base and the second end of the piston rod acting as a second input of the dual input master cylinder, wherein the piston rod is capable of being spaced apart from the piston base.

Provided is a braking device capable of improving ease of layout inside a housing. The braking device includes: a housing, a pump provided in the housing, a suction oil passage provided inside the housing, and connected to a suction part of the pump, and a reservoir provided inside the housing, having an opening for connection to an oil passage outside the housing on an outer surface of the housing. The suction oil passage open in the reservoir. Brake fluid is reserved in the reservoir.

Cup seals are fitted to a cylinder hole of a hydraulic pressure master cylinder. A plunger is movably inserted into the cylinder hole via the cup seals. A fluid chamber is formed on an outer circumferential side of the cylinder hole and between the cup seals so as to communicate with a fluid storage chamber through a fluid communication hole. The plunger is formed in a cylindrical shape having a bottom and provided with a recess portion opening toward a bottom portion of the cylinder hole. A hydraulic pressure chamber is defined between the recess portion and the bottom portion. Plural communication ports are formed in a circumferential wall of the recess portion, to penetrate the circumferential wall. When the plunger is in an initial position and is in a non-operating state, the communication ports connect the hydraulic pressure chamber and the fluid chamber.

Cup seals are fitted to a cylinder hole of a hydraulic pressure master cylinder. A plunger is movably inserted into the cylinder hole via the cup seals. A fluid chamber is formed on an outer circumferential side of the cylinder hole and between the cup seals so as to communicate with a fluid storage chamber through a fluid communication hole. The plunger is formed in a cylindrical shape having a bottom and provided with a recess portion opening toward a bottom portion of the cylinder hole. A hydraulic pressure chamber is defined between the recess portion and the bottom portion. Plural communication ports are formed in a circumferential wall of the recess portion, to penetrate the circumferential wall. When the plunger is in an initial position and is in a non-operating state, the communication ports connect the hydraulic pressure chamber and the fluid chamber.

A hydraulic operating device is provided. The disc brake caliper may include a brake lever pivotable on a pivot axis, a hydraulic cylinder having a cylinder axis and a reservoir arranged so as to at least partly overlap the hydraulic cylinder as seen from a first direction perpendicular to the pivot axis, the reservoir having a reservoir axis which has a different orientation than the cylinder axis as viewed from the first direction.

A hydraulic operating device is provided. The disc brake caliper may include a brake lever pivotable on a pivot axis, a hydraulic cylinder having a cylinder axis and a reservoir arranged so as to at least partly overlap the hydraulic cylinder as seen from a first direction perpendicular to the pivot axis, the reservoir having a reservoir axis which has a different orientation than the cylinder axis as viewed from the first direction.

Provided is a master cylinder unit including a simulator pressure chamber which communicates with a pressure chamber of a master cylinder and moves a simulator piston by means of an introduced fluid pressure; a biasing chamber in which a biasing mechanism biasing the simulator piston against a fluid pressure introduced into the simulator pressure chamber is disposed; a first seal member which partitions a simulator supply chamber, the simulator supply chamber, and the simulator pressure chamber communicating with a master supply chamber; and a second seal member which partitions the simulator supply chamber and the biasing chamber and allows a brake fluid to flow from the simulator supply chamber to the biasing chamber when a pressure difference occurs between the simulator supply chamber and the biasing chamber.

An electrified vehicle comprising a brake master cylinder included in the brake unit and a charger that converts power supplied from an external power supply into charging power and supplies it to the battery are located in the front compartment. Inside the front compartment, the brake master cylinder is located behind the charger in the longitudinal direction of the vehicle. A protective portion having a slide structure with an inclined surface formed on a portion facing the charger is provided between the brake master cylinder and the charger.

An electrified vehicle comprising a brake master cylinder included in the brake unit and a charger that converts power supplied from an external power supply into charging power and supplies it to the battery are located in the front compartment. Inside the front compartment, the brake master cylinder is located behind the charger in the longitudinal direction of the vehicle. A protective portion having a slide structure with an inclined surface formed on a portion facing the charger is provided between the brake master cylinder and the charger.