Clapper-type electromagnetic relay

Abstract

The invention discloses a clapper-type electromagnetic relay which comprises a magnetic path part, a movable spring part and a fixed spring part. The magnetic path part comprises an iron core, an armature, a yoke and a coil; the coil comprises a coil frame; the iron core is installed in the through hole of the coil frame; a pole shoe is arranged at the upper end of the iron core; the movable spring part comprises a movable reed and a movable contact; the fixed spring part comprises a fixed reed and a fixed contact; the upper end of the coil frame extends towards one side and is provided with a mounting part; the fixed reed is installed in the mounting part; the movable contact is matched with the fixed contact at the mounting part; at least a retaining wall is integrally arranged on the coil frame between the through hole and the mounting part to separate the pole shoe installed in the through hole of the coil frame from the fixed reed installed at the mounting part. The clapper-type electromagnetic relay can increase a creep distance between the iron core and the fixed reed to avoid electric accidents resulted from wrong conduction of the fixed contact and the movable contact which is caused by stacked metal contact splashing materials between the fixed contact and the movable contact, and also can greatly improve the shock resistance of the relay.

Description

technical field [0001] The invention relates to a relay, in particular to a snap-in electromagnetic relay. Background technique [0002] Relay is an automatic switching element with isolation function, which is widely used in communication, automobile, automatic control, household appliances and other fields, and is one of the most important control elements. [0003] A snap-fit ​​electromagnetic relay in the prior art usually includes components such as a magnetic circuit part, a moving spring part, a static spring part and a base, wherein the magnetic circuit part is composed of an iron core, an armature, a yoke and a coil, etc., and the coil is It is composed of enameled wire and coil frame. The enameled wire is wound on the coil frame. The coil frame is installed on the base. The iron core is usually installed in the hole of the coil frame. One end of the iron core is usually equipped with a pole shoe. When the relay operates, the armature will attract The pole face of ...

AI Technical Summary

Problems solved by technology

During the working process of the relay, the moving contact and the static contact will be ablated during the closing and opening process, and the metal contact material will be ablated and dropped, and accumulated between the static reed and the iron core. When the metal contact When the material is accumulated enough, the dielectric withstand voltage and insulation resistance between the dynamic and static contacts will be greatly reduced, and finally the static contacts on the static reeds will be connected to the iron core, that is, the static contacts and the moving contacts will be misleading. pass, causing the device to short-circuit

At the same time, the current flows directly from the plastic between the static spring and the iron core, which will generate a lot of heat on the surface of the plastic, which will eventually cause the plastic to ignite and burn the relay

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