Shield Connector Tubular Insertion for Wire Precision

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional shield connector structures face precision issues in connecting shield electric wires due to varying external diameters, leading to reduced water-stop performance when external forces are applied, as they require larger tolerances and increased inner diameters of the insertion hole to accommodate these variations.

Innovation Solution

A shield connector structure with a conductive connection member and tubular shield member that includes a first tubular unit inserted between the internal insulating covering and the shield unit, allowing for precise electrical connection without folding the shield unit, and utilizing seal members to enhance sealing and prevent water ingress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the shield unit is bent and overlaid on the shield member for connection, then the connection can be achieved, but the external diameter size varies and manufacturing precision deteriorates

Engineering Contradiction:

Improveconnection methodVSAvoidexternal diameter size

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

Instead of bending the shield unit to conform to the shield member, the invention inverts the approach by having the first tubular unit inserted into the shield unit. This reverses the deformation from the flexible component (shield unit) to the rigid component (tubular unit), maintaining precision while achieving connection.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The first tubular unit is inserted into the shield unit, creating a nested structure. This nesting arrangement allows the tubular unit to be positioned precisely within the shield unit without requiring bending, thereby maintaining manufacturing precision while achieving electrical connection.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If larger tolerances are given to accommodate shield unit variations, then ease of assembly improves, but the inner diameter of the insertion hole must be increased

Engineering Contradiction:

Improveassembly toleranceVSAvoidinner diameter of insertion hole

Core Design Contradiction:

Ease of operationVSLength of stationary object

Solution Approach 1:

The invention replaces the mechanical bending and overlay system with an insertion system. The first tubular unit is simply inserted into the shield unit without requiring complex bending operations, reducing assembly complexity and eliminating the need for increased tolerances and larger insertion holes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If the shield electric wire is inserted through the insertion hole, then connection is achieved, but water-stop performance deteriorates under external forces

Engineering Contradiction:

Improveconnection structureVSAvoidwater-stop performance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The first tubular unit is inserted into the shield unit before final assembly, establishing a pre-formed connection that maintains its position and sealing integrity. This preliminary action ensures that the connection structure is already optimized for water-stop performance before the wire is fully installed and subjected to external forces.

Inventive Principle:

Principle #10Preliminary action

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 improves the precision of the connection portion, reduces the gap between the electric wire guiding unit and the internal insulating covering, and enhances water-stop performance by maintaining the connection portion outside the insertion hole, thus preventing a reduction in water-stop properties even under external forces.

Implementation Method 1

The first tubular unit is inserted between the internal insulating covering and the shield unit

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

the fixing member is swaged from the outside in the diameter direction of the shield unit toward the first tubular unit

Methodology Applied

Scientific EffectCompression: Compression

Implementation Method 3

utilizing seal members to enhance sealing and prevent water ingress

Methodology Applied

Scientific EffectSealing:

Data Source

PatentUS9748704B2Shield connector structure

Publication Date: 2017.08.29 YAZAKI CORP

AI summary

A shield connector structure is provided that can increase the precision in the size of a connection portion of a shield electric wire and can improve the water-stop performance of the connection portion without being affected by the tolerance of the external diameter of a shield unit and an external insulating covering of the shield electric wire. A shield connector includes a connection member fixed to an outer surface of a metal case and a shield member connecting the connection member and a shield unit of a shield electric wire, and a shield pipe configured to fix an exposed portion of the shield unit to the shield member. A first tubular unit of the shield member is inserted between the exposed portion of the shield unit and an internal insulating covering.