Circuit Breaker Terminal Fixing Structure Against Pullout and Rotation
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Solution Overview
Problem
Existing circuit breakers lack robust, simple, and cost-effective solutions for stabilizing terminals that prevent rotation and translation without using screws or clamping elements, leading to reduced pullout force and increased deformation during installation.
Innovation Solution
A circuit breaker design featuring fixed terminals with upper and rear tabs, a molded cover with lower rods, and a molded base with housings that prevent rotation and translation through tab housings and lower rods, enhancing mechanical resistance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional circuit breakers use simple terminal mounting without screws or clamping elements, then the device complexity is reduced and manufacturing cost is lowered, but the terminal stability and resistance to pullout forces deteriorate
Solution Approach 1:
The terminal is segmented into a body portion and multiple tabs (upper tabs and rear tabs) that can be independently positioned and constrained. The tabs are inserted into corresponding housings in the molded base, allowing each tab to be independently secured while the terminal body remains simple in structure.
Solution Approach 2:
The tabs of the terminal are nested within housings in the molded base, creating a nested structure where the terminal tabs fit into recesses in the base. This nesting provides mechanical constraint and stability without requiring additional fastening elements.
2Productivity
If conventional circuit breakers lack a robust terminal stabilization system, then the manufacturing process is simplified and assembly time is reduced, but the resistance to torque and pullout force of terminals deteriorates
Solution Approach 1:
The terminal tabs are pre-formed on the terminal body during manufacturing, and the molded base includes pre-formed housings with positioning features. During assembly, the terminal is simply inserted into the base where the tabs automatically engage with the housings, providing immediate mechanical constraint without requiring additional assembly steps.
Solution Approach 2:
The terminal stabilization function is merged into the molded base structure itself. The housings in the base are designed to receive and constrain the terminal tabs, combining the functions of terminal mounting and mechanical stabilization into a single integrated component rather than requiring separate fastening elements.
3Stability of the object's composition
If circuit breakers use molded covers with fixing rods and bases with housings to prevent terminal rotation and translation, then terminal positional stability is improved, but the device complexity increases
Solution Approach 1:
The molded base serves multiple functions: it provides structural support for the circuit breaker, contains the electrical components, and includes integrated housings that stabilize the terminals. The fixing rods in the molded cover also serve dual purposes as both structural elements and terminal positioning features, reducing the need for separate stabilization components.
Data Source
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AI summary
The present invention relates to a circuit breaker (100) comprising a molded base (200) comprising: at least one housing (220) of a thermomagnetic set (600) comprising at least one terminal housing (201), a plurality of tab housings (202), a plurality of housings of a first rear tab (203) and a plurality of housings of a second rear tab (204). The present invention also relates to a circuit breaker (100) comprising a molded base (200) comprising: at least one arc extinguishing chamber (230) housing comprising at least one terminal housing (244), at least one pair of tab housings (245), at least one housing of a first rear tab (247) and at least one housing of a second rear tab (246).