Abstract: In a seesaw type electromagnetic relay comprising an armature carrying out a seesaw motion by excitation of an electromagnet, and a movable spring which carries out the seesaw motion in synchronism with the seesaw motion of the armature and which comprises a par of spring sections, at least one of the spring sections forks into two branches to form a pair of spring pieces one of which is bent downward. A pair of movable contacts is mounted at both free end parts of the movable spring on a bottom surface of the movable spring. One of the movable contacts is mounted at the free end part in the spring pieces on bottom surfaces thereof to form a pair of movable contact elements acting as a twin movable contact. A pair of fixed contacts faces the pair of movable contacts.

Abstract: In a surface mount type leadless electromagnetic relay, movable contacts, movable contact springs, stationary contacts and terminals which are electrically connected to external circuit from coils are formed integrally with a base formed of an insulating material. The terminals are extended to the bottom of the body of the relay. The entire relay has a height and a mounting area which are respectively equal to the height and mounting area of its body.

Abstract: A miniature flat relay comprising upper and lower insulating housing member. The lower member has a coil which snugly fits therein. The coil contains a core with a centrally located permanent magnet which energizes a U-shaped magnetic structure and provides a fulcrum for seesaw mounting an elongated armature. Movable electrical contacts project from opposite ends of the armature. A central section of the contacts forms hinge sections which project therefrom in order to secure the armature at said fulcrum. The armature may be made either bi-stable or monostable.