Patent ID: 7825756
Filing Date: 2010-11-02
Classification: H01H

Abstract:
1. An electro-magnetic relay, comprising: an electro-magnetic drive block comprising at least a coil, an iron core, a yoke and an armature; a contact block comprising a base, two sets of a pair of terminals provided in parallel, corresponding to two circuits fixed on the base, spherical fixed contacts provided at one end of the terminals, two both-end-supported movable springs and plane movable contacts disposed in positions corresponding to the fixed contacts provided on the movable springs; an insulation sheet disposed on the top surface of the two movable springs; and a press spring disposed on the top surface of the insulation sheet, each of the longitudinal both-ends of which is disposed on the top surface of the two movable springs, the center of which is cut in the shape of a character Z to form a pair of tongues and each tip of the pair of tongues of which is disposed in the middle of the two movable springs, wherein, the armature can drive the movable springs via the tip of the pair of tongues of the press spring, the root of the tongues, the longitudinal both-ends of the press spring and the insulation sheet to open/close the contact circuit of the two circuits, wherein, the press spring comprises a both-side joint the width of which is narrower than that of the tongues at an end in the further outside than the tongues in the sort side direction, wherein, when the armature pressed the tongues to touch the movable contacts on the fixed contacts, the both-side joint of the press spring bends in an upward concave shape, each of the longitudinal both-end sides of the press spring forms inclination from outside to inside, each of the two movable springs forms inclination downward the inside in the short side direction along the inclination of the longitudinal both-ends of the press spring and the movable contacts move toward the inside position of the two movable springs from the peak position of the spherical surface of the fixed contacts along the inclination downward the inside in the short side direction of the two movable springs.