Hydraulic pressure control unit

A hydraulic pressure control unit comprising:

• a discharge channel (140) from which a brake fluid is discharged, a pressure of the brake fluid being increased by a pump (60);
• and
• a pulsation reducer (100) that is provided to an intermediate portion of the discharge channel (140), wherein
• the pulsation reducer (100) includes:
• a pressure change suppressor (110), a volume of which varies according to a pressure of inflow brake fluid;
• a check valve (130);
• and
• a throttle valve (120) that is arranged on a downstream side of the pressure change suppressor (110) and an upstream side of the check valve (130) in the discharge channel (140),
• the throttle valve (120) includes:
• a first housing (121) that has an end surface (121a), one end of which is opened and the other end of which is provided with a first through-hole (121b), the brake fluid flowing into the first through-hole (121b);
• a first valve body (122) that can move in an axial direction of the first housing (121) in the first housing (121);
• and
• a first spring member (124) that urges the first valve body (122) in a direction toward the first through-hole (121b) of the first housing (121), and
• the first valve body (122) includes a seal section (122b) that closes the first through-hole (121b) of the first housing (121) and is formed with a throttle hole (122ba), wherein the first valve body (122) has:
• a hollow sleeve (122a);
• and a support section (122c) that is provided to one end of the sleeve (122a) and supports the seal section (122b), wherein a shape of the seal section (122b) is different from a shape of the support section (122c);
• wherein the check valve (130) has a second housing (131) that has an end surface, one end of which is opened and the other end of which is provided with a second through-hole (131b), the brake fluid flowing into the second through-hole (131b), wherein an outer surface of the other end of the second housing (131) supports the first spring member (124).