Shielded Conduction Path with Dual-Section Wire and Flexible Shield
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Solution Overview
Problem
Existing shielded conduction paths in vehicles face challenges in minimizing cross-section while maintaining flexibility, particularly when routing electric wires under the floor, as single-core wires are stiffer and harder to bend than stranded wires.
Innovation Solution
A shielded conduction path design incorporating a single-core electric wire portion formed by applying pressure to twisted strands, combined with a stranded wire portion and a dual-shielding system, where the single-core portion has reduced stiffness and is easier to bend, and the stranded portion is highly flexible, allowing for reduced cross-section and flexible routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single-core electric wire is used to reduce the cross section of the shielded conduction path, then the cross section is reduced, but the wire becomes stiffer and more difficult to bend
Solution Approach 1:
The electric wire is segmented into multiple strands that are twisted together, rather than using a single solid core. This segmentation allows the wire to maintain flexibility while achieving a reduced cross-sectional area, as the stranded structure can bend more easily than a solid core of equivalent area.
Solution Approach 2:
The physical state and arrangement of the conductor is changed from a solid single-core structure to a stranded twisted structure. This parameter change in the conductor's configuration enables both reduced cross-section and maintained flexibility by altering how the material is organized at the micro-structural level.
2Ease of operation
If stranded electric wire is used to maintain flexibility, then the wire remains flexible, but the cross section of the shielded conduction path increases
Solution Approach 1:
The electric wire is segmented into multiple strands that are twisted together, rather than using a single solid core. This segmentation allows the wire to maintain flexibility while achieving a reduced cross-sectional area, as the stranded structure can bend more easily than a solid core of equivalent area.
Solution Approach 2:
The physical state and arrangement of the conductor is changed from a solid single-core structure to a stranded twisted structure. This parameter change in the conductor's configuration enables both reduced cross-section and maintained flexibility by altering how the material is organized at the micro-structural level.
3Object-affected harmful factors
If the shielding member is made rigid to provide effective electromagnetic shielding, then shielding effectiveness is improved, but the overall flexibility of the shielded conduction path is reduced
Solution Approach 1:
The shielding member is constructed using flexible metallic material that can bend and deform without losing its electromagnetic shielding properties. This flexible shielding structure maintains effective noise blocking while allowing the entire shielded conduction path to be routed through flexible installations and bent around obstacles.
Solution Approach 2:
The shielding member utilizes composite construction combining metallic shielding material with flexible structural properties, creating a material that simultaneously provides effective electromagnetic shielding and maintains flexibility for routing through various pathways including bent and curved installations.
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 configuration enables a reduced cross-section and flexible routing of electric wires, preventing increased resistance and facilitating easier bending, while maintaining effective electromagnetic shielding.
Implementation Method 1
a shielding member (20) that electromagnetically shields the electric wire (10) by enclosing an outer circumference of the electric wire (10)
Implementation Method 2
a single-core portion (14) formed by applying pressure to a predetermined portion of a conductor (13) obtained by twisting a plurality of strands (13a) together and whose cross section has been reduced as a result of the application of the pressure
Data Source
AI summary
An electric wire and a shielding member configured to electrically shield the electric wire by enclosing an outer circumference thereof. A core wire of the electric wire has a single-core portion which is formed by applying pressure to a portion of a conductor obtained by twisting a plurality of strands together to reduce their cross section. This causes the strands to be brought into intimate contact with each other and form a single body, and a stranded wire portion in which the strands remain in a twisted-together state with no pressure having been applied thereto. The shielding member has a first shielding portion enclosing a portion of the electric wire where the core wire constitutes the single-core portion, and a second shielding portion enclosing a portion of the electric wire where the core wire constitutes the stranded wire portion. The second shielding portion has higher flexibility than the first shielding portion.