Polarization Tab Prevents Connector Misalignment

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Solution Overview

Problem

Existing electrical connector assemblies lack effective mechanisms to ensure proper orientation during mating, leading to potential misalignment and failure in establishing electrical communication between connectors.

Innovation Solution

Incorporation of an EMI shielding cage with a polarization tab that extends in a rearward direction, aligning with the connector housing, to interfere with misaligned second electrical connectors and prevent incorrect mating orientations, ensuring proper alignment and communication only when the connectors are correctly oriented.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If no polarization mechanism is provided, then the connector assembly is simpler to manufacture, but the connectors may mate in incorrect orientations leading to misalignment and failure of electrical communication

Engineering Contradiction:

Improvemating orientation reliabilityVSAvoidconnector assembly complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The polarization tab is pre-positioned on the EMI shielding cage in a specific orientation before mating occurs. This preliminary positioning ensures that when the second connector is inserted, the tab automatically guides it into the correct orientation, preventing misalignment and ensuring reliable electrical communication without requiring complex active control mechanisms

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The polarization tab creates an asymmetric structure on the otherwise symmetric EMI shielding cage. This asymmetry provides a unique geometric feature that allows the connector to be recognized and mated in only one correct orientation, eliminating the possibility of incorrect mating while maintaining simplicity in the overall design

Inventive Principle:

Principle #4Asymmetry

2Reliability

If a polarization tab is added to the EMI shielding cage, then incorrect mating orientations are prevented, but the manufacturing complexity of the cage increases

Engineering Contradiction:

Improvemating orientation preventionVSAvoidcage manufacturing ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The polarization tab is designed as a distinct, separate feature that can be added to the EMI shielding cage. This segmentation allows the tab to be manufactured independently and then attached to the cage, or formed as a separate stamping operation, simplifying the overall manufacturing process compared to creating a completely new complex cage structure

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The polarization tab is integrated with the EMI shielding cage to form a single assembly component. By merging the shielding function with the polarization function in one piece, the design eliminates the need for separate polarization mechanisms, reducing overall part count and simplifying assembly while maintaining manufacturing ease

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS9711901B2Electrical connector assembly including polarization member

Publication Date: 2017.07.18 FCI AMERICAS TECHNOLOGY LLC

AI summary

An electrical connector assembly can include a polarization member that is configured to prevent first and second electrical connectors from being mated to each other in an incorrect orientation. The polarization member abuts the first electrical connector such that the first electrical connector provides structural support to the polarization member when the second electrical contacts the polarization member. The polarization member is received by the second electrical connector when the second electrical connector is mated to the first electrical connector in a predetermined orientation.