Contact assembly of miniature circuit breaker
By improving the structure of the contact assembly of miniature circuit breakers, the moving and stationary contacts can achieve surface contact for conductivity and voltage division, solving the problems of overheating and burnout caused by poor contact, and improving stability and lifespan.
CN224177302UActive Publication Date: 2026-04-28ZHEJIANG JONAN METAL PIECE MFG CO LTD
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Patent Information
- Application Number
- CN202520772925.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-04-28
- Estimated Expiration
- 2035-04-23
AI Technical Summary
Technical Problem
The contact assembly of miniature circuit breakers is prone to burnout due to poor contact between the moving and stationary contacts, which can lead to localized overheating and excessively high breaking voltage.
Method used
The stationary contact is replaced with a movable one. A hemispherical conductive part is set on the movable contact to make contact with the arc-shaped groove on the stationary contact to achieve surface contact conductivity. An elastic conductive element is set between the stationary contact and the magnetic yoke to increase the conductive contact area and perform voltage division function.
Benefits of technology
This improves the stability and lifespan of the contact assembly, and avoids the possibility of localized overheating and contact burnout.
✦ Generated by Eureka AI based on patent content.
Abstract
The utility model discloses a miniature circuit breaker contact assembly, which comprises a static contact and a moving contact, and is characterized in that the moving contact is provided with a first hinge hole, hemispherical conductive parts are arranged on the moving contact, the static contact is provided with a second hinge hole, the static contact is provided with an arc-shaped groove for the hemispherical conductive parts to be clamped in, and the arc-shaped groove is communicated with the first hinge hole and the second hinge hole. The hemispherical conductive part can be attached to the inner side wall of the arc-shaped groove, and an elastic conductive piece is arranged between the static contact and the magnet yoke. The contact assembly is simple in structure and reasonable in design, can effectively increase the contact area between the moving contact and the static contact, avoids local overheating, can reduce the voltage of the contact end when the contacts are broken, reduces the possibility that the contacts are burnt out, improves the working stability of the contact assembly, and prolongs the service life of the contact assembly.
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