Push rod type electromagnetic relay

Abstract

The push rod type electromagnetic relay comprises a push card and an armature which are assembled on a base, the armature matching end of the push card is provided with an armature positioning raised head which is formed in an outward protruding mode, and the push card matching part of the armature is provided with a notch-shaped push card straddle groove which is formed in an inward concave mode from the bottom edge; in the inserting process of the armature on the base, the armature strides on the armature positioning protruding head through the pushing clamp striding groove, and the armature positioning protruding head is embedded into the pushing clamp striding groove. Aiming at the particularity of the push rod type electromagnetic relay, in the assembling process of the armature and the push card, the movable contact spring does not need to be bent and separated, the assembling efficiency and the assembling quality are high, the convenience of automatic assembling is better adapted, and the assembling technical difficulty is small; meanwhile, the anti-falling performance is good; abrasion of a matching stress surface between the armature and the pushing card is effectively reduced, soft flocks are few, and the mechanical durability of a relay finished product is higher.

Description

technical field [0001] The invention relates to an electromagnetic relay, in particular to a push rod type electromagnetic relay. Background technique [0002] see figure 1 As shown, the common push rod electromagnetic relay is mainly composed of base 1, coil 8, yoke 5, armature 3 ， , compression spring 7, push card 2 ， , moving reed 4 ， , static reed 6, etc., the coil 8 is assembled on the coil frame 13 of the base 1, the yoke 5 is assembled on the yoke frame 12 outside the coil 8, the armature 3 ， Through the compression spring 7, it is pressed on the yoke 5 and can swing, and the moving reed 4 ， Fitted to armature 3 ， On the base 1 on the side, the static reed 6 is at the movable reed 4 ， on the side, push the card 2 ， Assembly on armature 3 ， with moving reed 4 ， Between them, it is located on the magnetic circuit retaining wall 11 of the base 1 . The working principle of the electromagnetic relay of this structure is: [0003] - When the two ends of the pins ...

AI Technical Summary

Problems solved by technology

[0013] It can be seen that pushing the assembly structure of the jack between the card and the armature will increase the technical difficulty of the assembly process and reduce the assembly efficiency; in addition, the above-mentioned assembly process that this structure will inevitably bring is due to the shift fork on the assembly line. The stroke consistency is relatively poor, which leads to the deformation of some moving reeds due to excessive bending, which leads to poor consistency of product parameters of the finished relays;

[0014] 2. The socket assembly structure between the push card and the armature makes the force bearing surface between the push card and the armature smaller. When the push card is pushed up during the repeated swing of the armature, it is easy to make the gap between the armature and the push card The repeated friction of the cooperating force-bearing surface will produce wear debris and accumulate, and the existence of the debris will have an adverse effect on the continuity of the relay;

[0015] 3. The single socket assembly structure between the push card and the moving reed requires that the push card socket on the moving reed be formed at the center position directly below the moving contact, and form a center position push during the pushing process of the push card , so it is easy to make the alignment between the upper movable contact and the side static contact worse; in addition, because the force bearing surface between the push card and the movable reed is small, it is easy to make the The moving reed heats up, and the long-term action will easily cause excessive wear of the push card, which will not work reliably;

[0016] 4. The push card is seated on the magnetic circuit retaining wall of the base in a surface contact manner through the bottom surface. During the mutual pushing process between the armature and the moving reed, the frictional resistance between the push card and the top surface of the magnetic circuit retaining wall is relatively small. Large, it needs a large enough electromagnetic attraction torque and moving spring reaction torque to overcome, which is contradictory to the miniaturization of the relay, which is not conducive to the miniaturization of the relay, especially the ultra-miniaturization

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