Power Circuit Breaker Fuse Locking Mechanism
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Solution Overview
Problem
Existing power-circuit breaking devices for electric vehicles have a complex structure with many components and process steps due to the need for secure fixing of male terminals and metallic tabs, making them cumbersome and difficult to assemble.
Innovation Solution
A power-circuit breaking device with a simplified structure featuring a lock member and cover limiter that securely fixes the fuse inside the housing, reducing the number of components and streamlining the assembly process, using a cylindrical fuse body and terminals with bent corners and cutouts for easy engagement and prevention of deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fixing structures with multiple components are used to secure male terminals and metallic tabs, then the reliability of the connection is improved, but the device complexity and number of components increases
Solution Approach 1:
The patent combines multiple fixing functions into a single integrated lock member that simultaneously secures both the male terminals and metallic tabs. This lock member integrates the functions of multiple separate fixing components into one unified structure, reducing the total number of parts while maintaining secure connections.
Solution Approach 2:
The lock member is designed as a multi-functional component that performs multiple fixing operations simultaneously. It engages with both the male terminals and metallic tabs through its various engagement portions, making a single component serve multiple securing functions that would traditionally require separate fixtures.
2Stability of the object's composition
If traditional fixing structures with multiple process steps are used to assemble male terminals and metallic tabs, then the connection stability is improved, but the manufacturing time and process complexity increases
Solution Approach 1:
The lock member is pre-designed with integrated engagement features that simultaneously engage multiple components (male terminals and metallic tabs) in a single assembly operation. This preliminary structuring of the locking mechanism allows all fixing actions to be performed concurrently rather than sequentially, reducing assembly steps.
Solution Approach 2:
Multiple assembly operations that would traditionally be performed separately are merged into a single assembly action. The lock member's design allows simultaneous engagement with multiple components, consolidating several fixing steps into one coordinated assembly motion.
3Ease of manufacture
If a simple structure with fewer components is used, then the ease of manufacture and assembly is improved, but the risk of fuse displacement or falling out increases
Solution Approach 1:
The lock member is segmented into multiple functional portions, each responsible for engaging a specific component (male terminals, metallic tabs). This segmentation allows the single lock member to provide multiple independent securing actions, ensuring comprehensive fuse retention while maintaining structural simplicity.
Solution Approach 2:
The lock member acts as an intermediary component between the fuse and the housing, providing a mechanical locking interface that secures the fuse without requiring complex external fixing structures. It mediates the connection by engaging with both the fuse components and the housing structure.
4Reliability
If multiple fixing components and structures are used, then the fuse security is improved, but the number of parts and assembly steps increases
Solution Approach 1:
Multiple separate fixing components are merged into a single integrated lock member that provides equivalent or superior securing functionality. The lock member consolidates the functions of multiple discrete parts into one unified component, reducing part count while maintaining fuse security.
Solution Approach 2:
The lock member is designed as a universal fixing component that simultaneously performs multiple securing functions. It engages with different components (male terminals, metallic tabs) through its various engagement portions, making one component replace multiple specialized fixing parts.
Data Source
AI summary
A power-circuit breaking device, which can easily mount a fuse and has a small number of component and a simple structure. The power-circuit breaking device includes a first connector housing having a pair of circuit terminals connected with a power circuit, and a second connector housing closing the power circuit by fitting with the first connector housing. The second connector housing includes a fuse having a pair of terminals to be connected with the pair of circuit terminals, a housing having a lock arm engaged with a cutout provided at the terminal and a cover an entry opening of a receiving section of the housing. The cover includes a limiter limiting the lock arm to move to disengaging the terminal.