Microminiature heavy-current electromagnetic relay

Abstract

The present invention provides a microminiature heavy-current electromagnetic relay, belonging to the technical field of relays. The defect is solved that a large-load relay is large in volume in theprior art by employing the microminiature heavy-current electromagnetic relay. The microminiature heavy-current electromagnetic relay comprises a housing, a yoke, a coil, a coil rack, an iron core, anarmature, a movable contact spring module and a static contact spring module. The static contact spring module is installed on the coil rack, the coil is winded on the coil rack, and the iron core isinserted into a coil rack iron core hole. The yoke is simpler in processing process, the processing efficiency is higher, the consistency of the knife edge angles is better, the cost is saved, and therefore, the whole structure of the relay is more compact and the whole volume of the relay is smaller.

Description

technical field [0001] The invention belongs to the technical field of relays, and relates to an ultra-small high-current electromagnetic relay. Background technique [0002] The existing electromagnetic relay generally has a large load with a large volume, and a small load with a small volume. It is a difficult point in structural design for a relay that is suitable for high-density installation and large load, and it is also a development direction of the relay. [0003] At present, the existing electromagnetic relay generally includes a casing, a yoke, a coil, a coil frame, an iron core, an armature, a moving reed assembly and a static reed assembly. When the relay is energized, the coil forms a magnetic field, and the generated magnetic attraction is transmitted to the armature through the yoke, so that the armature rotates with the edge of the yoke as the fulcrum, and finally matches with the pole shoe surface of the iron core to form a whole magnetic circuit, thereby ...

AI Technical Summary

Problems solved by technology

The accuracy of the knife edge includes two aspects. The first is the angle of the knife edge. If the angle is large, the flux leakage will increase, reduce the magnetic efficiency, and then affect the action performance; if the knife edge angle is small, the fulcrum of the armature rotation will shift, which will also affect the action performance ; The second is the straightness of the ridge line of the knife edge, which will be used as the axis of rotation of the armature

The existing problems: First, when processing the traditional yoke, a certain length will be reserved first to make a rough cut, and then the mold plane is rotated 1-3°, and then a fine cut is made to form an ideal knife edge. Therefore, the process is more complicated, the processing is troublesome, and the consistency is poor; the second is that the armature and the yoke iron edge line should exceed the edge edge line when they contact, so that the armature and the yoke iron edge line can contact and rotate with the edge edge line as the axis of rotation

If the vertical part of the yoke is straight, the armature has to be moved outward to exceed the ridge line of the yoke, so that the armature will touch the shell, and the volume must be increased to make way, which will increase the volume of the relay

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