Three-closing-force magnetic latching relay capable of monitoring opening and closing states of movable and static contacts

Abstract

The invention discloses a three-closing-force magnetic latching relay capable of monitoring opening and closing states of movable and static contacts. The three-closing-force magnetic latching relay comprises a shell, a coil assembly, a rotary armature assembly, a combined push clamp, a movable spring sheet, a movable contact and a static contact, wherein a compressed duplex spring is arranged at the back of the movable contact on the movable spring sheet and is formed by connecting two helical springs into one body through steel wires at the bottoms of the helical springs; a 'Z'-shaped pressure elastic sheet is also arranged at the back of the movable contact on the movable spring sheet; the upper part of the pressure elastic sheet is adhered to the surface of the movable spring sheet at the back of the movable contact, and the lower part of the pressure elastic sheet is clamped into the combined push clamp; a bump is arranged at the upper surface of the combined push clamp; and a microswitch which is connected with an external display device is arranged on the shell and opposite to the bump. The three-closing-force magnetic latching relay is novel in design and ingenious in structure, can improve the reliability of closing of the movable and static contacts by using three closing force, and has the function of monitoring the opening and closing states of the movable and static contacts to ensure that the external display device can display the closing state or the opening state of the movable and static contacts.

Description

technical field [0001] The invention relates to a magnetic holding relay, in particular to a three-close force magnetic holding relay capable of monitoring the opening and closing states of dynamic and static contacts. Background technique [0002] Magnetic latching relay, the closed or open state is only maintained by the magnetic force generated by the permanent magnet, and the transition between the closed and open states only depends on a certain width of positive DC or reverse DC pulse voltage to excite the coil to trigger the linkage parts An electrical control device that is completed by action. The magnetic latching relay has the characteristics of only pulse excitation, low power consumption, strong load, safety and reliability, etc., and is widely used in automatic control circuits, especially in high-current power systems. [0003] At present, there is an armature rotating magnetic latching relay. The closed state of the dynamic and static contacts is maintained ...

AI Technical Summary

Problems solved by technology

[0003] At present, there is an armature rotating magnetic latching relay. The closed state of the dynamic and static contacts is maintained only by the elastic force of the elastic deformation of the movable reed itself as the closing force. Generally, there is a problem that the reliability of the dynamic and static contacts is not high. Especially in the high current environment, the problem of low closure reliability is particularly prominent

In addition, the existing armature rotating magnetic latching relay does not have the function of monitoring the opening and closing states of the dynamic and static contacts, and cannot make the external display device display whether the relay is in the closed state or in the open state

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