PROBLEM TO BE SOLVED: To provide a normally open electromagnetic valve in which the valve member can be kept stable at low cost and the movable core can be driven efficiently with low electric power.;SOLUTION: A normally open electromagnetic valve 1 includes: a fixed core 3; a movable core 7 which is disposed so as to be able to advance toward and retreat away from the fixed core 3 and is driven when excited; a valve seat member 6 provided in the fixed core 3 and having a funnel-shaped valve seat surface 61; a valve member 5 disposed so that the valve member advances or retreats together with the movable core 7 with one end of the valve member kept in abutment with the movable core 7, and that the other end of the valve member closes or opens a flow passage by coming into abutment with or separates from the valve seat surface 61; and a return spring 81 which urges the valve member 5 away from the valve seat surface 61. The fixed core 3 has a cylindrical holding hole 34. The valve member 5 advances or retreats being guided by the holding hole 34 in sliding contact with the holding hole. The movable core 7 has a projection 72 which projects toward the fixed core 3 and which is directly inserted into the holding hole 34.;COPYRIGHT: (C)2013,JPO&INPIT
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