Shield Connector Integrated Seal Member Design

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Solution Overview

Problem

Conventional shield connectors are enlarged due to multiple parts, which can deteriorate shield performance and increase costs, and require additional components like cushion rings to maintain electrical connection, leading to increased complexity and size.

Innovation Solution

A shield connector design featuring a tubular housing, an electrically conductive tubular shield terminal, and a tubular seal member with an integral annular member made of resin, which simultaneously seals the insert hole and the shield electric wire, reducing the number of components and maintaining effective sealing and shielding without enlarging the connector.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple seal members are used to seal between the shield electric wire and shield member, then sealing performance is improved, but the number of parts increases and the connector size is enlarged

Engineering Contradiction:

Improvesealing performanceVSAvoidnumber of parts

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple seal members into a single integrated seal member that performs both sealing functions. The seal member includes a first seal portion for sealing between the shield electric wire and shield member, and a second seal portion for sealing between the shield connector and attaching hole, both integrated into one component rather than using separate seal members.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The seal member is designed with multi-functionality to perform multiple sealing tasks simultaneously. It provides both the first seal function (between shield electric wire and shield member) and the second seal function (between shield connector and attaching hole) through its integrated structure, eliminating the need for multiple separate seal members.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple seal members are used to seal between the shield electric wire and shield member, then sealing performance is improved, but the connector size is enlarged deteriorating shield performance

Engineering Contradiction:

Improvesealing performanceVSAvoidshield performance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If a cushion ring is provided between the shield member and crimping part, then electrical connection reliability is improved, but the number of parts increases and cost increases

Engineering Contradiction:

Improveelectrical connection reliabilityVSAvoidnumber of parts

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The cushion ring is integrated into the shield member structure rather than being a separate component. The shield member includes a cushion ring portion that provides the necessary cushioning and electrical connection reliability directly at the crimping part interface, eliminating the need for a separate cushion ring component.

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If the crimping part is separated from the shield member to ensure creeping distance, then electrical safety is improved, but the device size is enlarged

Engineering Contradiction:

Improveelectrical safetyVSAvoiddevice size

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP2612398B1Shield connector

Publication Date: 2016.03.23 YAZAKI CORP

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Figure 3A~4

AI summary

A shield connector includes a housing and a shield terminal. The housing, has a tubular shape so that a shield electric wire is inserted thereinto, and is attached to an objective body so as to communicate with an insert hole of the objective body. The shield terminal, has a tubular shape, is electrically conductive, is attached to an inner peripheral side of the housing, and is electrically conducted to the objective body and the shield layer. A seal member having a tubular shape is provided between an inner periphery of the insert hole and the shield electric wire and between the shield terminal and the shield electric wire, so as to seal a part between the inner periphery of the insert hole and an outer periphery of the shield electric wire and a part between an inner periphery of the shield terminal and the outer periphery of the shield electric wire.