Magnetic circuit structure and magnetic latching relay

By designing a magnetic circuit structure with matching grooves and protrusions in the magnetic latching relay, combined with elastic elements and magnets, the problems of low attraction force and wear between the moving iron core and the stationary iron core are solved, resulting in faster operating time and higher reliability.

CN224745658UActive Publication Date: 2026-09-11XIAMEN HONGFA TRANSPORTATION ELECTRONICS CO LTD
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Patent Information

Application Number
CN202521904856.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-04
Publication Date
2026-09-11
Estimated Expiration
2035-09-04

AI Technical Summary

Technical Problem

In existing magnetic latching relays, the initial attraction between the moving iron core and the stationary iron core is small, and the moving iron core is prone to tilting, leading to wear and affecting the accuracy of engagement.

Method used

The magnetic circuit structure design increases the magnetic conduction area by setting matching grooves and protrusions between the moving iron core and the stationary iron core. The guide groove guides the movement of the moving iron core, reduces the magnetic gap, and provides initial attraction force in combination with elastic elements and magnets, ensuring accurate engagement and separation of the moving iron core and the stationary iron core.

Benefits of technology

It improves the initial attraction between the moving iron core and the stationary iron core, shortens the action time, avoids wear, and enhances the reliability and accuracy of the magnetic latching relay.

✦ Generated by Eureka AI based on patent content.
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Abstract

The application relates to a magnetic circuit structure and a magnetic latching relay. The magnetic circuit structure comprises a coil holder, the coil holder being provided with a mounting hole; a static iron core, which is arranged on the coil holder and located in the mounting hole, the static iron core being provided with a matching protrusion; and a moving iron core, which is movably arranged in the mounting hole, the side of the moving iron core facing the static iron core being provided with a matching groove, and the side of the matching groove facing the static iron core being provided with a guide groove; wherein when the moving iron core moves along the height direction, the matching groove can cover or separate from the matching protrusion, so that the moving iron core and the static iron core are attracted or separated. In this way, the matching groove and the matching protrusion can improve the initial attraction force when the moving iron core and the static iron core are closed, and can also guide the movement of the moving iron core, avoid the movement of the moving iron core in the mounting hole from being inclined, and further avoid the abrasion between the moving iron core and the coil holder, thereby improving the reliability of the magnetic latching relay.
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