Patent ID: 7938381

Claim:
An electromagnetic valve comprising: a fixed core; a movable core disposed so as to advance and retreat relative to the fixed core; a coil which generates a magnetic field which causes the fixed core and the movable core to attract each other; a valve body disposed so as to move together with the movable core; and a valve seat member comprising: a funnel-shaped valve seat surface which closes a flow path by being brought into abutment with the valve body and an inlet path formed in a bottom of the valve seat surface, wherein fluid flows from the inlet path towards the valve body side, the flow path is opened and closed by retreat and advance of the valve body relative to the valve seat surface, the valve body comprises: a semi-spherical seal portion; and a stem portion which extends from the seal portion towards the movable core and which is integrally formed with the seal portion, wherein a diameter of an end portion of the seal portion is larger than a diameter of the stem portion, and a space into which the fluid flows out is defined in an area which is located on an extended line extending from a small diameter end portion to a large diameter end portion of the valve seat surface, wherein the valve body comprises: a large diameter portion which is provided closer to the movable core than the stem portion and which has a larger diameter than that of the stem portion; and a diameter expanding portion whose diameter is gradually increased from the stem portion towards the large diameter portion.