Large-current-impact-resistant structure of high-capacity relay

CN224288175UActive Publication Date: 2026-05-26YUEQING MEISHUO ELECTRIC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
YUEQING MEISHUO ELECTRIC
Filing Date
2025-05-23
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing high-capacity relays have insufficient mechanical closing reaction force under high current impact, causing the contacts to pop open, forming gaps and potentially exploding, affecting service life and reliability.

Method used

The design employs magnetically conductive components, which enhance magnetic field attraction and reduce mechanical closing reaction force by setting extensions and high magnetic permeability materials on the connecting bridge. The connecting bridge is fixed to the main body by riveting to reduce electromagnetic loss, and arc-initiating plates and arc-extinguishing chambers are combined to prevent the influence of electric arc.

Benefits of technology

It improves the relay's resistance to high current surges, enhances contact pressure, reduces electromagnetic losses, increases reliability and service life, and prevents the effects of electric arcs.

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Abstract

The utility model discloses a large-current-impact-resistant structure of a high-capacity relay, and the structure is characterized in that a housing is provided with an accommodation cavity; the movable contact assembly comprises a connecting bridge, a first magnetic conductive piece is fixed on the connecting bridge, the first magnetic conductive piece comprises a body part and an extension part, the body part is connected with the connecting bridge, and the extension part extends towards the outer side of the connecting bridge and exceeds the side surface of the connecting bridge; the coil assembly is linked with the movable contact assembly; the two conducting strips are matched with the two ends of the connecting bridge respectively; the second magnetic conductive piece is matched with the first magnetic conductive piece; by adopting the structure arrangement, when the two ends of the movable contact assembly are respectively connected with the two conducting strips, a magnetic field is generated around the connecting bridge, the cutting magnetic induction lines generate electromagnetic attraction force on the surface of the first magnetic conducting piece and generate attraction force on the second magnetic conducting piece, the contact pressure between the contacts is increased, the mechanical closing reaction force of the relay is reduced, and the product reliability is improved; through the arrangement of the extension part, the first magnetic conduction piece extends towards the outer side, the area of cutting magnetic induction lines is increased, the magnetic flux is increased, and the electromagnetic attraction force is improved.
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