Conductive Line Shield Structure with Overlapping Insulative Base
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Solution Overview
Problem
Existing conducting line shield structures face challenges in maintaining shielding functions while ensuring insulation characteristics and reducing costs, particularly in automotive electric wires where the exposure of metal foil compromises insulation and increases costs.
Innovation Solution
A conductive line shield structure utilizing an enclosure-type shielding member with a metal foil and insulative base material, wrapped in a film, sheet, or tape shape, where one side end overlaps to prevent exposure and is protected by a protective member, reducing unnecessary thickness and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an enclosure type shielding member with metal foil is used to reduce cost, then manufacturing cost is reduced, but metal foil may be exposed from lateral parts causing insulation characteristics to deteriorate
Solution Approach 1:
The shielding member is constructed as a composite material combining metal foil and insulative base material in a laminated structure. The insulative base material serves as both the substrate for the metal foil and as an insulating barrier that prevents metal foil exposure, thereby maintaining insulation characteristics while preserving the cost-reduction benefits of the enclosure type shielding member.
2Reliability
If the insulative base material extends from the end of metal foil to prevent exposure, then insulation characteristics are maintained, but the structure becomes more complex
Solution Approach 1:
The insulative base material serves multiple functions simultaneously: it acts as the substrate for bonding the metal foil, provides lateral insulation coverage to prevent metal foil exposure, and extends beyond the metal foil edges to ensure complete insulation. By combining these functions into a single component, the structure remains simple while maintaining insulation characteristics.
3Reliability
If a protective member is added to enclose the shielding member, then shielding function and insulation are maintained, but device complexity increases
Solution Approach 1:
The insulative base material is designed to extend beyond the metal foil edges and serve as both the insulating layer and the protective covering for the shielding member. This multi-functional design eliminates the need for a separate protective member, thereby maintaining shielding function and insulation characteristics while avoiding increased structural complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution maintains shielding functions, ensures insulation characteristics, and reduces costs by preventing metal foil exposure and simplifying manufacturing, while allowing for targeted application of wear-resistant, heat-resistant, and heat-shield members only where needed.
Implementation Method 1
a shielding member, being a sheet including an insulative base material and a metal foil, and wrapped so as to enclose the first conductive line therein
Data Source
AI summary
A conductive line shield structure includes a first conductive line and a shielding member. The first conductive line includes a conductive part and an insulative part. The shielding member is a sheet including an insulative base material and a metal foil, and is wrapped so as to enclose the first conductive line therein. One side end part of the shielding member overlaps an outside surface of the insulative base material so that one side end part of the insulative base material is in contact with the outside surface of the insulative base material.