Resin Structure Waterproofing via Ribs and Protrusions
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Solution Overview
Problem
In resin structures like relay boxes, gaps between assembled resin bodies can allow high-pressure cleaning water to enter, potentially splashing onto internal electronic components due to relative movement (backlash), which compromises waterproofing.
Innovation Solution
Incorporating a prevention mechanism, such as ribs on the inner surface of the bottom wall and protrusions on the side walls, to prevent water flow through gaps between resin bodies, ensuring alignment and enhancing waterproofing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resin bodies are assembled to each other with alignment portions, then the resin structure can be formed with modular components, but gaps occur due to relative movement (backlash) between the resin bodies
Solution Approach 1:
The waterproof member is pre-installed on the resin body before assembly, forming a protective barrier in advance. This preliminary action ensures that when the resin bodies are assembled with alignment portions, the waterproof member is already positioned to prevent water infiltration through potential gaps caused by backlash, thus maintaining waterproofing reliability while preserving modular assembly capability
Solution Approach 2:
The waterproof member acts as an intermediary element between the aligned resin bodies. It is positioned at the alignment portion to fill and seal the gap that would otherwise form due to relative movement, mediating between the modular components to prevent water infiltration while allowing the assembled structure to maintain its modular benefits
2Ease of operation
If high pressure cleaning is performed on the resin structure, then cleaning effectiveness is improved, but water enters through gaps and splashes on internal surfaces
Solution Approach 1:
The waterproof member converts the harmful effect of high-pressure water flow into a beneficial sealing function. By positioning the waterproof member at the alignment portion, it utilizes the pressure differential created during high-pressure cleaning to enhance the seal, preventing water infiltration and splashing while allowing effective external cleaning to proceed
Solution Approach 2:
The waterproof member provides preliminary anti-action by creating a barrier before water can infiltrate through the gaps. During high-pressure cleaning, this pre-positioned waterproof member actively resists water infiltration at the alignment portion, counteracting the harmful effect of water entering and splashing on internal surfaces while maintaining cleaning effectiveness on the external surfaces
Data Source
AI summary
A resin structure includes a first resin body having an annular first side wall portion, a second resin body having a second side wall portion, and a third resin body having a bottom wall portion and an annular third side wall portion connected to the bottom wall portion. The second resin body is assembled to the first resin body, such that an upper edge of the second side wall portion and at least a portion of an annular lower edge of the first side wall portion in a circumferential direction are aligned. The third resin body is assembled to the second resin body, such that an annular upper edge of the third side wall portion and at least a lower edge of the second side wall portion are aligned.