Wire Harness Port Structure with Concave Armoring Guides
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Solution Overview
Problem
The existing wire harness leading-out port structures in electric connection boxes for automobiles face issues with looseness in armoring members causing assembly difficulties, water ingress, and unstable fixation, due to the armoring material getting caught at junctions between half-cylindrical bodies.
Innovation Solution
A wire harness leading-out port structure with concave portions at the junctions of half-cylindrical bodies to accommodate loose armoring members, preventing them from getting caught and ensuring a secure, watertight seal by forming a cylindrical guide with these concave areas, which are designed to gradually narrow and utilize L-shaped cross-section curved walls for effective armoring without increasing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If half-cylindrical bodies are coupled to form a cylindrical wire harness leading-out guide, then the wire harness can be guided and fixed, but loose armoring members get caught at the junctions causing assembly difficulties and gaps
Solution Approach 1:
The concave portions are pre-formed at the junctions of the half-cylindrical bodies before assembly, creating ready-made accommodation spaces for loose armoring members. This preliminary preparation prevents the loose portions from interfering with the coupling process and ensures proper alignment during assembly.
Solution Approach 2:
The concave portions act as intermediary elements that mediate between the half-cylindrical bodies and the loose armoring members. They provide a dedicated space that allows the loose portions to be accommodated without preventing the half-cylindrical bodies from coupling properly, thus resolving the conflict between securing the wire harness and avoiding assembly interference.
2Object-affected harmful factors
If half-cylindrical bodies are coupled tightly to prevent gaps, then waterproofing is improved, but loose armoring members cannot be accommodated causing assembly instability
Solution Approach 1:
The concave portions are localized features created only at the specific junction areas where armoring member looseness occurs, rather than modifying the entire cylindrical structure. This local modification maintains the overall simplicity of the cylindrical guide while providing targeted accommodation spaces that prevent water ingress paths at the critical junction points.
3Ease of operation
If concave portions are added to accommodate loose armoring members, then assembly ease and waterproofing are improved, but the structural complexity increases
Solution Approach 1:
The concave portions are integrated into the half-cylindrical bodies themselves, merging the accommodation function with the existing structural components. Rather than adding separate elements or attachments, the concave features are formed as part of the half-cylindrical body geometry, thus improving assembly ease without significantly increasing overall structural complexity.
Data Source
AI summary
A wire harness leading-out opening is provided at a junction between an electric connection box and a bottom surface cover which constitute an electric connection box. A cylindrical wire harness leading-out guide is provided on the periphery of the wire harness leading-out opening, and is formed in a way that the both circumferential ends of a half-cylindrical body formed on the electric connection box and a half-cylindrical body formed on the bottom surface cover are coupled to each other. In the inner circumference of a circumferential junction between the peripheral walls of the two half-cylindrical bodies, a concave portion is provided to accommodate a loose portion of an armoring member wrapped around the outer circumference of the wire harness.