Fluid control valve unit and valve timing changing device

A fluid control valve unit comprising:

• a fluid control valve comprising a sleeve in a bottomed cylindrical shape defining a predetermined axis, and a spool slidably accommodated in the sleeve in a direction of the axis;
• a cylindrical passage member comprising an inner peripheral surface to which the sleeve is fitted, a receiving part annularly formed inside the cylindrical passage member and configured for receiving an end of the sleeve in the direction of the axis, and an annular groove recessed from the inner peripheral surface;
• and
• a snap ring comprising a notch with a predetermined gap and fitted in the annular groove to be capable of restricting the fluid control valve accommodated in the passage member from falling off in the direction of the axis and to be capable of discharging fluid flowing through a discharge passage formed in the passage member,
• wherein the passage member comprises a positioning recess for positioning the sleeve around the axis,
• the sleeve comprises the discharge passage for discharging fluid and a positioning protrusion that is fitted into the positioning recess,
• the snap ring comprises an opening through which fluid passes and a fitting protrusion that is fitted into the positioning recess so that the opening communicates with the discharge passage, and
• wherein the sleeve comprises a first groove passage and a second groove passage formed extending in the direction of the axis in an outer wall to define the discharge passage, and a communication recess in the outer wall that causes the first groove passage and the second groove passage to communicate with each other in a circumferential direction to define the discharge passage.