WASHER PUMP

Since the pump chamber (), the valve chambers (and ), the discharge holes (and ), and the flow paths ( and ) are integrally provided to each other in the housing (), in the case where these are formed of separate members, a step or the like that inhibits the flow of the cleaning liquid “W” is not formed in the flow path of the cleaning liquid “W”, so that the pressure loss of the cleaning liquid “W” can be reduced. In addition, since the valve chambers (and ) of the flow paths ( and ) extend to the discharge holes (and ), the cleaning liquid “W” flowing out of the flow paths ( and ) can be discharged at a portion closer to the central of the valve chambers (and ). As a result, the outlet portions of the flow paths ( and ) and the inlet portions of the discharge holes (and ) is brought closer to each other, and the turbulent of the cleaning liquid “W” in the valve chambers (and ) can be suppressed, thereby reducing the pressure loss.