Abstract: Each of first and second contact blocks includes a substantially rectangular insulating member, a pair of stationary contact members projecting inward from the insulating member and supported with a predetermined interval therebetween, a movable contact member arranged between the pair of stationary contact members and supported by the insulating member, and first, second, and third terminals for electrically extracting the pair of stationary contact members and the movable contact member, respectively, and projecting from a base portion of the insulating member with predetermined intervals therebetween. An electromagnet includes a movable member for commonly acting on the movable contact members of the first and second contact blocks to move each movable contact member toward one of the pair of stationary contact members of each of the first and second contact blocks.

Abstract: An electromagnetic relay includes a cylindrical bobbin around which a coil is wound, and a step is formed at a middle portion of the cylindrical bobbin. A large-diameter portion is formed at one side of the step, and a smaller-diameter portion is formed at the other side of the step. The outer and inner diameters of the smaller-diameter portion are smaller than those of the large-diameter portion. An armature and a leg of a yoke are inserted in the large-diameter portion, and the armature is inserted in the smaller-diameter portion. The inner diameter of the large-diameter portion corresponds to a total sum of a thickness of the armature, a thickness of the yoke, and a moving stroke of the armature, and that of the smaller-diameter portion corresponds to a total sum of the thickness and the moving stroke of the armature. The coil is wound around the outer surface of the bobbin.