A magnetic latching relay with a balanced armature part

Abstract

The present invention discloses a magnetic latching relay provided with a balanced armature part. The magnetic latching relay comprises a base, a coil frame, an armature part and two groups of movable and static springs which are correspondingly matched with each other. The magnetic latching relay further comprises a long rotation shaft. The long rotation shaft is fixed at one end of the armature part, so that an armature at the other end of the armature part can rotate about the long rotation shaft. The coil frame and / or the base are / is provided with two shaft holes for supporting the rotation of the long rotation shaft. Meanwhile, the electromagnetic suction force acting point of the armature part and the thrust force acting point of the armature part are respectively located at the two sides of a support action line formed after the supporting action of the two shaft holes on the long rotation shaft, so that the torque of the electromagnetic suction force acting point relative to the support action line and the torque of the thrust force acting point relative to the support action line are cancelled out by each other. According to the technical scheme of the invention, during the switching process, the twisting phenomenon of the armature part can be effectively reduced, so that the stability of product parameters is ensured. Therefore, the purpose of improving the product reliability is realized.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to a magnetic latching relay with a balanced armature part. Background technique [0002] The structure of the existing magnetic latching relay consists of a magnetic circuit system, a contact system, a driving mechanism and a base (or called a base). The magnetic circuit system generally consists of two basic magnetic circuits, including stationary magnetizer parts, movable magnetizer parts and coils, the contact system includes a moving spring part and a static spring part, and the pushing mechanism is generally acted by a pushing block. The relay coil passes the positive pulse voltage, the magnetic circuit system works, the pushing block pushes the moving spring part, making the contacts contact, the relay operates, the coil passes the reverse pulse voltage, the magnetic circuit system works, the pushing block pushes the moving spring part, making the contacts disconnected, the r...

AI Technical Summary

Problems solved by technology

like image 3 As shown, since the matching length between the rotating shaft hole 303 of the armature part 300 and the short rotating shaft 201 on the bobbin 200 is very short (that is, the mating section is too short), the electromagnetic attraction point of the armature part 300 (that is, the armature 301 and the iron core, yoke The arm of force between the contact point of the iron) and the line of action of the short rotating shaft 201 is b, and the force arm of the point of action of the thrust of the armature part 300 (that is, the position of action of the pushing part 302 and the moving spring 400) and the line of action of the short rotating shaft 201 is a, where The moment arms a and b are all on the same side of the short rotating shaft 201 (such as image 3 The lower side shown), and the shaft hole 303 of the armature part 300 must be in a clearance fit with the short shaft 201 of the bobbin 200, so the relay will cause an unbalanced rotational moment when switching the load, so that the armature part 300 will be in the process of action. A large twist is generated, which leads to the contact point between the armature 301 of the armature part 300 and the iron core and yoke of the magnetic circuit system, and the contact point between the pushing part 302 of the armature part 300 and the moving spring is very unstable, making the parameters of the product It is also unstable and seriously affects the reliability of the product

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