Wire Harness Shield Attachment via Terminal Insertion

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Solution Overview

Problem

The existing wire harness designs face difficulties in stabilizing and efficiently attaching shield members to the tubular member due to the instability of connection portions when using swage rings, making the attachment process cumbersome.

Innovation Solution

The wire harness incorporates a configuration where the shield members' end portions are grouped and fixed using a conductive terminal, which is then press-fitted into a terminal member, allowing for easier and more stable attachment by using a fastener to secure the terminal to the tubular member.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If connection portions of shield members are fastened to the tubular member using a swage ring from the outer peripheral side, then the shield members can be attached to the tubular member, but the attachment process becomes troublesome and the attachment positions become unstable

Engineering Contradiction:

Improveattachment position stabilityVSAvoidattachment process ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Instead of fastening the connection portions from the outer peripheral side of the tubular member, the invention inverts the approach by inserting the connection portions through the tubular member from one end to the other side. This inversion of the fastening direction simplifies the attachment process and ensures stable positioning of the shield members on the tubular member.

Inventive Principle:

Principle #13The other way round (Inversion)

2Strength

If connection portions are fastened using a swage ring, then the shield members can be secured to the tubular member, but the connection portions bend during attachment making the work troublesome

Engineering Contradiction:

Improveshield member fixation strengthVSAvoidattachment work ease

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The invention replaces the mechanical swage ring fastening system with a through-insertion fastening system. Instead of using a swage ring that requires bending and mechanical deformation, the connection portions are simply inserted through the tubular member and secured, eliminating the bending issue and simplifying the attachment work while maintaining secure fixation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If shield members are attached separately to the tubular member, then each shield member can be individually secured, but the attachment task becomes more complex and time-consuming

Engineering Contradiction:

Improveindividual shield member securityVSAvoidattachment efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The invention merges multiple separate attachment operations into a single integrated process. By inserting multiple connection portions through the tubular member simultaneously or in sequence through the same access path, the attachment task is simplified and accelerated, improving productivity while ensuring each shield member is securely fixed to the tubular member.

Inventive Principle:

Principle #5Merging (Combining)

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 simplifies the attachment process of shield members to the tubular member, providing a more stable and efficient method compared to direct soldering or separate fixation, enhancing the overall assembly process.

Implementation Method 1

portions at one end of the plurality of shields are press-fitted into the terminal

Methodology Applied

Scientific EffectPress-fitting: Mechanical Force

Implementation Method 2

electromagnetic noise generated as a result of passing electricity through the electric wires is absorbed by the shield member

Methodology Applied

Scientific EffectElectromagnetic absorption: Absorption (EM radiation)

Implementation Method 3

a fastener to secure the terminal to the tubular member

Methodology Applied

Scientific EffectMechanical fastening: Mechanical Fastener

Data Source

PatentUS11335476B2Wire harness

Publication Date: 2022.05.17 SUMITOMO WIRING SYSTEMS LTD

AI summary

A wire harness including: a tube that is made of metal; a plurality of electrical wires that are inserted into the tube; and a plurality of shields that are formed by braided wires in which conductive strands are woven into a tubular shape, and include tubular portions that respectively cover portions of the electrical wires located outside the tube, wherein portions at one end of the plurality of shields are put together and are fixed to the tube.