A knife-type fuse
By using a low-melting-point metal and a return spring as triggers, combined with a locking mechanism and turntable design, the contact-type fuse achieves automatic separation and status indication after melting. This solves the problem of traditional fuses requiring tools for positioning and replacement, which is inconvenient, and improves troubleshooting efficiency and safety.
CN121922542BActive Publication Date: 2026-05-26SHAANXI ZHONGHE CHANGDA ELECTROMECHANICAL TECH CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHAANXI ZHONGHE CHANGDA ELECTROMECHANICAL TECH CO LTD
- Filing Date
- 2026-03-27
- Publication Date
- 2026-05-26
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Figure CN121922542B_ABST
Abstract
This application discloses a contact-type fuse, relating to the technical field of fuses. It includes a fuse body, a power socket, a locking mechanism, and a triggering mechanism. When the main circuit inside the fuse body melts, the push rod retracts into the insulating shell, releasing the locking mechanism and triggering its unlocking. The turntable, under the action of the torsion spring, drives the fuse body to rotate, causing the copper busbar to separate from the power socket. This application employs a triggering method of "low-melting-point metal + retraction spring," directly utilizing the melting of the fuse's main circuit as the trigger source. This results in extremely fast response, immunity to electromagnetic interference, and high reliability. Furthermore, after melting, the fuse automatically ejects from the power socket, creating a visible disconnection state and position change. Maintenance personnel can instantly locate the faulty branch without any tools, greatly improving troubleshooting efficiency.
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