Electrical Connection Box Lid Ribs for Water Ingress Routing
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Solution Overview
Problem
Conventional electrical connection boxes fail to effectively control the entry point of water into the accommodation space, allowing water to potentially reach and affect electronic components during pressure washing or heavy rain, making it difficult to identify the entry location.
Innovation Solution
A housing design with a lid body and ribs that form compartments, including a sealing rib to direct water flow away from components that require power and into compartments without power, utilizing area reduction ribs and discharge spaces to manage water entry and exit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a double-structured circumferential wall part is used with lid body positioned between housing outer and inner circumferential walls, then water sealing performance is improved, but water may still enter through the upper end part of housing outer circumferential wall and flow in the space part, making entry location difficult to identify
Solution Approach 1:
The accommodation space is divided into multiple compartments by partition walls, with each compartment containing electronic components of different water sensitivity. This segmentation allows water that enters the housing to be confined to specific compartments rather than affecting all components, and enables identification of water entry location based on which compartment is affected.
Solution Approach 2:
Different compartments are designed with different protection levels and component arrangements based on their location relative to potential water entry points. Compartments more exposed to water risk contain components less sensitive to water, while more protected compartments house water-sensitive components. This local differentiation of quality ensures that even if water enters, critical components remain protected.
2Reliability
If water proofing measures are enhanced to completely prevent water entry, then electronic component protection is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
Instead of making the entire housing completely waterproof with complex sealing structures, the invention segments the accommodation space into compartments and uses simpler sealing measures at compartment levels. This allows adequate protection against water entry while maintaining manufacturing feasibility and avoiding excessive complexity.
Solution Approach 2:
The housing employs different protection levels at different locations rather than uniform high-level protection throughout. Critical areas receive enhanced protection while less critical areas use simpler measures, optimizing the balance between protection effectiveness and manufacturing complexity.
3Reliability
If compartments with electronic components are positioned away from potential water entry points, then component safety is improved, but available space for component arrangement is reduced
Solution Approach 1:
The accommodation space is segmented into multiple compartments that can be independently arranged and configured. This allows electronic components to be distributed across different compartments based on their water sensitivity and functional requirements, maximizing the use of available space while ensuring safe positioning of critical components.
Solution Approach 2:
Different compartments are assigned different protection characteristics and component types based on their spatial location. Compartments in areas with higher water risk contain less water-sensitive components, while compartments in protected areas house critical water-sensitive components, optimizing both space utilization and component safety.
Data Source
AI summary
A housing includes a housing main body and a lid body. The housing main body has a housing outer circumferential wall and a housing inner circumferential wall. The lid body has a top board, a lid body outer circumferential wall, a lid body inner circumferential wall, and ribs. An accommodation space includes a plurality of compartments that are positioned closer to the housing inner circumferential wall. The compartments include a first compartment that is positioned on a downstream side of a sealing rib in a water flow direction, and that is provided with electronic components that are able to accept electric power, and a second compartment that is positioned on an upstream side of the sealing rib, and that is not provided with the electronic components that are able to accept electric power.