Hydraulic pressure control unit, braking system, and bicycle

A hydraulic pressure control unit (110) for use with a braking system (100) configured to be mounted on a bicycle (200), the hydraulic pressure control unit (110) capable of executing an antilock braking control, the hydraulic pressure control unit comprising:

• an inlet valve (131) and an outlet valve (132) which are opened and closed when the antilock braking control is executed;
• and
• a base body (120) to which the inlet valve (131) and the outlet valve (132) are attached,
• wherein a mount part (150) of the hydraulic pressure control unit (110) for mounting the hydraulic pressure control unit (110) to the bicycle (200) is configured to be joined to a front fork (15) of the bicycle (200),
• wherein a master cylinder port (121) to which a liquid pipe (18) communicating with a master cylinder (14B) is connected, a wheel cylinder port (122) to which a liquid pipe (19) communicating with a wheel cylinder (17A) is connected, and an internal flow path (123) communicating the master cylinder port (121) and the wheel cylinder port (122) with each other is formed in the base body (120),
• wherein, in a state where the hydraulic pressure control unit (110) is mounted on the bicycle (200) and the bicycle (200) stands upright, the master cylinder port (121) is formed in a first surface (120a) that is an upper surface of the base body (120), and the wheel cylinder port (122) is formed in a second surface (120b) facing the first surface (120a) of the base body (120),
• wherein the inlet valve (131) is driven by a first coil (131A),
• wherein the outlet valve (132) is driven by a second coil (132A),
• wherein the first coil (131A) and the second coil (132A) are erected on a third surface (120c) of the base body (120),
• wherein the third surface (120c) is generally planar and extends from the first surface (120a) to the second surface (120b),
• wherein the hydraulic pressure control unit (110) further comprises a circuit board (135A) electrically connected to at least one of the first coil (131A) and the second coil (132A), wherein the circuit board (135A) is held in a state where a mounting surface (135Am) of the circuit board (135A) extends along the direction (D) in which the first surface (120a) and the second surface (120b) are arranged,
• wherein the hydraulic pressure control unit (110) further comprises a connector (137) electrically connected to the circuit board (135A), wherein the connector (137) is erected in a direction different from the direction (D) in which the first surface (120a) and the second surface (120b) are arranged, and
• wherein the hydraulic pressure control unit (110) further comprises an accumulator (133) for storing brake fluid flowing through the internal flow path (123), wherein the accumulator (133) is provided on the second surface (120b) of the base body (120), and in a state where the mounting surface (135Am) of the circuit board (135A) is viewed from the front, the connector (137) is located on the side where the first surface (120a) is located with respect to the first coil (131A) and the second coil (132A).

A bicycle comprising a braking system (100) including a hydraulic pressure control unit (110) of the braking system (100), the hydraulic pressure control unit (110) being mounted on the bicycle (200) and being capable of executing an antilock braking control, the hydraulic pressure control unit comprising:

• an inlet valve (131) and an outlet valve (132) which are opened and closed when the antilock braking control is executed;
• and
• a base body (120) to which the inlet valve (131) and the outlet valve (132) are attached,
• wherein a mount part (150) of the hydraulic pressure control unit (110) for mounting the hydraulic pressure control unit (110) to the bicycle (200) is joined to a front fork (15) of the bicycle (200),
• wherein the front fork includes a first bar and a second bar that extend on opposite sides of a front wheel of the bicycle, and wherein the mount part (150) is positioned on the first bar between upper and lower ends of the first bar,
• wherein, in a state where the bicycle stands upright, the mount part is positioned on the first bar closer to the lower end than the upper end
• wherein a master cylinder port (121) to which a liquid pipe (18) communicating with a master cylinder (14B) is connected, a wheel cylinder port (122) to which a liquid pipe (19) communicating with a wheel cylinder (17A) is connected, and an internal flow path (123) communicating the master cylinder port (121) and the wheel cylinder port (122) with each other are formed in the base body (120),
• wherein, in the state where the bicycle (200) stands upright, the master cylinder port (121) is formed in a first surface (120a) that is an upper surface of the base body (120), and the wheel cylinder port (122) is formed in a second surface (120b) facing the first surface (120a) of the base body (120),
• wherein the inlet valve (131) is driven by a first coil (131A),
• wherein the outlet valve (132) is driven by a second coil (132A), and
• wherein the first coil (131A) and the second coil (132A) are erected on a third surface (120c) of the base body (120).