Shielded Cable Sleeve Structure to Prevent Assembly Position Shift

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Solution Overview

Problem

The position of the sleeve in a connector device is prone to shift towards the sheath due to forces applied during assembly, which can disrupt the electrical properties of the shielded cable.

Innovation Solution

A shielded electrically conductive path is designed with a sleeve surrounding the shield layer and a butting portion extending rearward to contact the sheath, ensuring the sleeve remains in position despite external forces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a holding member is bent radially inward to apply force to the cable, then the sleeve position is held in axial direction, but the sleeve position shifts toward the sheath when external force is applied during assembly

Engineering Contradiction:

Improvesleeve position stabilityVSAvoidresistance to external force

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The holding member is divided into two functional segments: a front end portion that contacts the cable for axial positioning, and a butting portion that contacts the sheath for radial force resistance. This segmentation allows each segment to specialize in resisting specific forces, preventing sleeve position shift during assembly.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The butting portion acts as an intermediary element between the holding member and the sheath. It transfers external radial forces from the assembly process to the sheath, preventing these forces from displacing the sleeve axially while maintaining proper positioning.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the sleeve is positioned to surround the shield layer, then electrical shielding is maintained, but the sleeve is susceptible to position shift during outer conductor assembly

Engineering Contradiction:

Improveelectrical shielding integrityVSAvoidposition shift during assembly

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The butting portion is designed to preemptively counteract the radial forces that will be applied during outer conductor assembly. By providing a contact surface with the sheath before assembly forces are applied, it prevents the sleeve from shifting position, thereby maintaining electrical shielding integrity throughout the assembly process.

Inventive Principle:

Principle #9Preliminary anti-action

3Ease of operation

If the holding member is designed to contact the cable, then axial positioning is achieved, but radial forces during assembly cause position shift

Engineering Contradiction:

Improveaxial positioning capabilityVSAvoidresistance to assembly forces

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The holding member is segmented into a front end portion for axial positioning (contacting the cable) and a butting portion for radial force resistance (contacting the sheath). This allows the device to maintain ease of axial positioning while simultaneously resisting assembly forces that would otherwise cause position shift.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250246851A1Shielded electrically conductive path

Publication Date: 2025.07.31 AUTONETWORKS TECH LTD

AI summary

A shielded electrically conductive path (100) includes a shielded cable (10) formed such that a shield layer (13) surrounding a core wire (11) is surrounded by a sheath (14), a sleeve (15) arranged to surround an outer periphery of the shield layer (13) extending forward in an axial direction of the shielded cable (10) from a front end of the sheath (14), and a butting portion (15) extending forward in the axial direction from a rear end of the sleeve (15) and configured to contact the front end of the sheath (14).