Power Distribution Cover Closure Verification With Gear-Cam Locking
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Solution Overview
Problem
Existing power distribution boxes in automotive vehicles face issues with incomplete latching of covers, leading to potential exposure of components to moisture and debris, even when locking features are present, and lack of assurance that the cover is fully closed.
Innovation Solution
A power distribution assembly with a hinge assembly, gear-cam arm, and lock mechanism that ensures the cover is securely closed, combined with a closure detection switch and shunt to verify the cover's position, providing electronic confirmation of a complete closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking feature is provided to lock the cover in place, then the cover should remain securely closed, but the locking feature may allow for incorrect or incomplete latching of the cover
Solution Approach 1:
The patent implements a verification switch that detects whether the cover is properly closed and provides feedback through a visual indicator (light). The switch is actuated by a cam mechanism that only engages when the cover is in the correct closed position, providing immediate feedback to the user about the latching status and preventing operation with an improperly closed cover.
Solution Approach 2:
The patent introduces a cam mechanism as an intermediary between the cover and the verification switch. The cam translates the mechanical position of the cover into a reliable switch actuation, ensuring that the verification switch only activates when the cover is properly closed, thereby mediating between the physical cover position and the electronic verification system.
2Ease of operation
If the cover is not completely closed, then access to components is maintained, but exposure of components to moisture or debris occurs
Solution Approach 1:
The verification switch provides immediate feedback when the cover is not completely closed, preventing the system from operating in a state where components are exposed to moisture or debris. The visual indicator clearly communicates the improper closure state to the user.
Solution Approach 2:
The system prevents operation before harmful exposure can occur by requiring proper cover closure as a prerequisite. The verification switch must be activated (cover properly closed) before the system can function, thereby preemptively preventing moisture and debris ingress.
3Reliability
If multiple verification mechanisms are added to ensure complete closure, then closure reliability is improved, but device complexity increases
Solution Approach 1:
The cam mechanism serves as a mechanical intermediary that simplifies the verification process. It automatically translates the cover's position into switch actuation, eliminating the need for complex sensors or multiple verification points while ensuring reliable detection of proper closure.
Solution Approach 2:
The verification system is self-actuating through the cam mechanism that automatically engages the verification switch when the cover is properly closed. The system uses its own closure motion to trigger the verification, eliminating the need for external verification actions or complex control systems.
Data Source
AI summary
A power distribution assembly that has a cover which selectively seals over an opening in a housing of the power distribution assembly, a locking assembly for securing the cover in a secured position, and a closure detection switch that provides notification when the cover is open. A readable media may be included on the cover to provide an indication of complete closure of the cover on the housing.