Electrical Connection Box Wire Routing Infiltration Prevention

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Solution Overview

Problem

Conventional electrical connection boxes face challenges in maintaining waterproofing due to varying wire proportions and gaps at the wire outlet, which can allow liquids like water to enter and potentially damage electronic components.

Innovation Solution

The electrical connection box incorporates a wire routing space with a guide wall surface and a liquid stop wall to catch entering liquids, along with a liquid drain port to discharge caught water, enhancing waterproofing capabilities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the same enclosure is used for various specifications, then cost is reduced, but the gap in the wire outlet becomes great and waterproofing ability deteriorates

Engineering Contradiction:

ImprovecostVSAvoidwaterproofing ability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The wire routing space is segmented into an upper space and a lower space by the infiltration prevention structure. This segmentation allows the enclosure to maintain a fixed size for cost efficiency while the segmented routing space adapts to different wire configurations and prevents liquid infiltration effectively.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The infiltration prevention structure acts as an intermediary element between the wire outlet and the housing chamber. It catches liquid entering from the wire outlet before it can reach the electronic components, thus maintaining waterproofing ability without requiring a custom enclosure for each specification.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the wire outlet gap varies by specification, then adaptability is improved, but liquid infiltration risk increases

Engineering Contradiction:

Improvespecification adaptabilityVSAvoidliquid infiltration

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The infiltration prevention structure serves multiple functions: it guides wires of various specifications through the wire routing space and simultaneously catches liquid entering from the wire outlet. This universal structure enables the same enclosure to adapt to different specifications while maintaining protection against liquid infiltration.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The wire outlet gap, which could be harmful by allowing liquid infiltration, is converted into a beneficial feature. The infiltration prevention structure utilizes the space created by the gap to effectively catch and redirect liquid away from the housing chamber, turning the potential weakness into a functional advantage.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS10547165B2Electrical connection box and wire harness with infiltration protection structure

Publication Date: 2020.01.28 YAZAKI CORP

AI summary

an electrical connection box includes an enclosure, and at least one electronic component housed in the enclosure, where the enclosure includes a housing chamber where the electronic component is housed, a wire outlet configured to allow a wire that is electrically connected to the electronic component to be drawn out from inside to outside, a wire routing space configured to guide, to the wire outlet, the wire that is drawn out from the housing chamber, and an infiltration prevention structure configured to catch, inside the wire routing space, liquid entering from the wire outlet, and where the infiltration prevention structure includes a wall that is configured to catch liquid entering from the wire outlet.