Balance force type sealed electromagnetic relay

Abstract

The invention relates to a balance force type sealed electromagnetic relay, which comprises an armature, a first yoke, a second yoke and a third yoke of a magnetic circuit part, and is characterized in that when the balance force type sealed electromagnetic relay is in a pull-in or release state, the armature is respectively switched to be in contact fit with the second yoke or the third yoke; a main body of the second yoke is roughly of a straight sheet structure, one end, relatively close to the armature, of the second yoke takes the thickness section of the second yoke as a contact plane abutting against the armature, the armature is of an obtuse-angle-shaped bent sheet structure, and the contact plane can be machined through a precision cutting process. The fineness can be effectively improved, the armature and the second yoke are prevented from colliding to generate powder, the sheet body plane of the armature abuts against and is attached to the contact plane of the second yoke, the attaching area of the armature and the second yoke is reduced, the holding force of the armature in the excitation state can be reduced, and armature release is facilitated.

Description

technical field [0001] The invention relates to a balanced force type sealed electromagnetic relay, in particular to the improvement of the structure of the yoke and the armature. Background technique [0002] The balanced force sealed electromagnetic relay has the same armature holding force and contact pressure in the excited and de-energized state, so it has excellent environmental resistance mechanical properties. Such as Figure 1-3 As shown, the magnetic circuit part of the existing balanced force type sealed electromagnetic relay (such as US3484729A and CN209729821U) includes an iron core, a coil, a magnetic steel, an armature 4', and a first yoke 1' on one side and a first yoke on the other The second yoke 2' and the third yoke 3' on one side, the armature 4' is rotatably arranged between the second yoke 2' and the third yoke 3', and has a rotating shaft, the first yoke 1' is always in contact with the armature 4', and the armature 4' is bent at the position corresp...

AI Technical Summary

Problems solved by technology

But on the other hand, in the process of the armature 4' swinging towards the second yoke 2' (that is, during the relay pull-in process), it is also necessary to overcome the obstacles caused by the elastic deformation of the return spring, and the armature 4' The pull-in movement will become slower, and the breaking speed of the NC contact group driven by the armature will be correspondingly slower. At the moment of breaking the NC contacts, the arcing time will become longer, and the contact ablation will increase, which cannot guarantee the long life of the relay.

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