A spring-return relay

Through innovative design of transmission components and linkage actuation mechanism, a relay with large contact gap and high current impact resistance has been achieved, solving the problems of contact sticking and arc extinguishing in traditional relays in high current applications, thus improving product reliability and production efficiency.

CN122136225APending Publication Date: 2026-06-02长沙中坤电子科技有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
长沙中坤电子科技有限责任公司
Filing Date
2026-03-24
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In applications with high current or large contact gap, traditional relays often struggle to balance current carrying capacity, weldability, and mechanical life simultaneously, leading to contact adhesion and arc failure.

Method used

A novel contact drive and reset system is constructed by combining transmission components and linkage actuation mechanisms. The lever mechanism is formed by the rotating frame, rotating shaft and transmission rod to amplify the contact opening distance, and the reset force is provided by the torsion spring to avoid accidental contact repulsion or welding.

Benefits of technology

It achieves a contact gap of ≥5.5mm, which improves the ability to withstand high current surges and product reliability, prevents arc reignition, and the modular design facilitates production, improving production efficiency and consistency.

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Abstract

This invention discloses a resiliently resettable relay, belonging to the field of electrical components. The relay includes a housing, a drive assembly, a lead-out assembly, and a transmission assembly. The lead-out assembly includes a stationary lead-out terminal, a moving lead-out terminal, and a linkage actuation mechanism. The stationary lead-out terminal has a stationary contact, and the moving lead-out terminal is connected to the moving contact via the linkage actuation mechanism. The transmission assembly includes a rotating shaft, a rotating frame, a torsion spring, and a transmission rod. The rotating frame is rotatably mounted on the rotating shaft and fixedly connected to the actuating plate of the linkage actuation mechanism. The torsion spring is sleeved on the rotating shaft and connected to both the housing and the actuating plate. The transmission rod connects the drive assembly and the rotating frame. This invention abandons the traditional moving and stationary spring structure. Through the cooperation of the transmission assembly and the linkage actuation mechanism, it easily achieves a large contact gap of 5.5 mm or more and provides strong contact pressure, effectively resisting the electrostatic repulsion under high current impact.
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