Electromagnetic relay

Abstract

The invention discloses an electromagnetic relay, which comprises a base, a housing, a coil, a movable reed and two static reeds. The housing is fixedly connected with the base. The coil is located between the base and the housing. The movable reed is provided with a plurality of movable contacts. Each static reed comprises a plate-shaped base part, part of one side of each plate-shaped base partextends outwards and is bent to form a static contact fixing part, and a static contact is fixedly arranged on each static contact fixing part. The base is provided with avoiding through holes. The two static reeds are fixedly connected to the outer side face of the base at intervals through the plate-shaped base parts respectively, each static contact fixing part stretches into the position between the base and the housing through one avoiding through hole, and each static contact corresponds to one movable contact on the movable reed. The plate-shaped base part on each static reed partiallyextends out of the housing to form a connecting part. According to the invention, the heat dissipation effect of the static reed is well improved, the performance of the relay is improved, the preparation process is simplified, the preparation cost is reduced, and the service life of the relay is prolonged.

Description

technical field [0001] The invention relates to the technical field of relay manufacturing, in particular to an electromagnetic relay. Background technique [0002] Electromagnetic relay is an electronic control device, which has a control system (also known as input circuit) and a controlled system (also known as output circuit), usually used in automatic control circuits, it actually uses a smaller current, lower An "automatic switch" that controls a larger current and a higher voltage with a higher voltage. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. [0003] Electromagnetic relays, especially snap-in relays, usually include a base, a cover, a coil, a moving reed and two static reeds. The cover is fixedly connected to the base, and the coil is wound on the bobbin. The center hole of the frame is equipped with an iron core, the coil frame is fixedly connected with a yoke, the middle of the moving reed is...

AI Technical Summary

Problems solved by technology

But the main body of the static reed and the base are injection-molded into one, and its existing problems are: 1. The heat dissipation of the static reed is poor, which affects the performance of the relay; especially for high-current electromagnetic relays (such as relays with a contact current of 200A and above ), calorific value Q=I 2 *R*t, the calorific value is proportional to the square value of the current. The calorific value of a high-current relay is very large. If it cannot be effectively and quickly dissipated heat, the relay is very likely to fail due to high temperature; 2. The injection molding process is complicated and the defective rate Higher, higher preparation cost; 3. The contact turnover of the static reed is sent to the supplier for insert injection molding and then returned to the factory. The turnover time is long and exposed in an unclean space for a long time, which is extremely easy to be polluted and will also affect Relay quality and service life

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