Shield Wire Spiral Winding for Wiring Harness Workability

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Solution Overview

Problem

The existing shield wires for wiring harnesses face difficulties in workability due to the complexity of inserting electric wires through pre-formed shield pipes, leading to inefficient wiring processes and potential exposure of electric wires during bending.

Innovation Solution

A shield wire design featuring a spirally wound strip-like shield member that overlaps radially and extends axially, with convex and concave portions to facilitate easy bending and prevent electromagnetic wave exposure, eliminating the need for inserting the electric wire into a pre-formed shield pipe.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a shield pipe is formed before inserting the electric wire, then the shield part can cover the electric wire, but the work for inserting the electric wire becomes difficult and workability for wiring worsens

Engineering Contradiction:

Improveshielding effectivenessVSAvoidworkability for wiring

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Instead of forming the shield pipe first and then inserting the electric wire, the invention inverts the sequence by first forming the electric wire and then winding the shield member around it. This reversal of the conventional process eliminates the difficulty of inserting the wire through a pre-formed pipe while still achieving effective electromagnetic shielding.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The invention performs the preliminary action of forming the electric wire structure before applying the shield member. By preparing the electric wire assembly first and then wrapping the shield member around it, the process simplifies the wiring work while ensuring the shield part is properly formed and positioned.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If the shield wire is bent, then workability for wiring is improved, but the electric wire may expose and electromagnetic wave leakage or penetration occurs

Engineering Contradiction:

Improveworkability for wiringVSAvoidshielding effectiveness

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The shield member is wound in a spiral configuration around the electric wire, creating a curved, continuous protective layer. This spiral curvature allows the shield to flex and bend without exposing the electric wire, maintaining shielding effectiveness even when the wiring harness is deformed during installation.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The spiral winding structure provides dynamic adaptability, allowing the shield part to deform elastically with the electric wire during bending operations. The continuous spiral configuration ensures that the shield maintains its protective function throughout the range of motion, preventing electromagnetic wave leakage even when bent.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9437351B2Shield wire for wiring harness and method of making the same

Publication Date: 2016.09.06 YAZAKI ENERGY SYSTEM CORP

AI summary

Disclosed is a shield wire for a wiring harness improving workability for wiring, and a method of the shield wire for a wiring harness. Forming of a shield part by winding a strip-like shield member outside of an electric wire allows work for inserting the electric wire into the shield part to be omitted, which improves workability for wiring. Forming of overlap portion where the shield part overlaps with each other in a radial direction allows the electric wire not to be exposed even if the shield electric wire for a wiring harness is bent, which prevents leak or penetration of electromagnetic wave.