Wire Harness with Annular Electromagnetic Wave Absorption Component
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Solution Overview
Problem
The attachment of electromagnetic wave absorption components to multiple electric wires in a wire harness creates handling issues due to the space formed by the radial thickness of these components, affecting the routing characteristics and assembly of the wire harness.
Innovation Solution
A wire harness design that incorporates an annular electromagnetic wave absorption component with a through-hole for bundling multiple electric wires together, combined with a movement-restricting member formed by winding a resin tape, which restricts the movement of the absorption component and improves handling without creating gaps between the wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an annular electromagnetic wave absorption component is attached to each of the plural electric wires, then the electromagnetic noise absorption effect is improved, but the handling of the wire harness becomes difficult due to the space formed between the wires
Solution Approach 1:
The patent combines multiple individual electromagnetic wave absorption components into a single integrated absorption component that can be attached to multiple electric wires simultaneously. This merging approach maintains the electromagnetic noise absorption function while eliminating the handling difficulties caused by multiple separate components on each wire.
Solution Approach 2:
The electromagnetic wave absorption component is designed with a universal structure that can accommodate multiple electric wires at once. The component functions both as an electromagnetic noise absorber and as a wire bundling element, improving handling by allowing multiple wires to be managed as a single unit.
2Object-affected harmful factors
If an annular electromagnetic wave absorption component is attached to each of the plural electric wires, then the electromagnetic noise absorption effect is improved, but the routing characteristics of the wire harness are degraded
Solution Approach 1:
By merging multiple absorption components into one integrated component that envelops multiple wires, the patent maintains noise absorption effectiveness while preserving the natural routing and flexibility of the wire harness. The unified structure prevents the shape degradation that would result from multiple discrete components on individual wires.
Solution Approach 2:
The electromagnetic wave absorption component is designed to nest around multiple electric wires simultaneously, with the wires passing through or being enveloped by the component. This nesting configuration allows the absorption component to maintain close proximity to all relevant wires for effective noise absorption while not interfering with the overall routing characteristics of the wire harness.
3Reliability
If a coil as an inductance is inserted for each of the plural electric wires, then the electric current smoothing function is achieved, but the device complexity increases
Solution Approach 1:
The patent merges multiple individual inductance coils into a single integrated electromagnetic wave absorption component. This consolidation maintains the electric current smoothing function across multiple wires while significantly reducing the overall device complexity and the number of separate components that would need to be installed and managed.
Solution Approach 2:
The electromagnetic wave absorption component is designed as a universal multi-functional element that provides both inductance-based current smoothing and electromagnetic noise absorption simultaneously for multiple wires. This eliminates the need for separate inductance coils on each wire, thereby reducing structural complexity while maintaining reliability.
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 design enhances the routing characteristics and assembly of the wire harness by allowing the electromagnetic wave absorption component to be attached without gaps, effectively absorbing electromagnetic noise while preventing movement and rotation, thus improving handling and reducing noise interference.
Implementation Method 1
an annular electromagnetic wave absorption component having a higher electromagnetic noise absorption effect, such as ferrite core, could be attached to each of the plural electric wires
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A wire harness includes a plurality of electric wires, a first wire holding portion for holding one of both end portions of the plurality of electric wires, a second wire holding portion for holding another of the both end portions, and an annular electromagnetic wave absorption component arranged between the first and second wire holding portions so as to absorb electromagnetic wave radiated from the plurality of electric wires. The electromagnetic wave absorption component includes a through-hole for inserting collectively the plurality of electric wires such that the plurality of electric wires are inserted through the though-hole and are thereby bundled together.