Multi-Fiber Optical Port Geometry to Block Single-Fiber Mis-Mating

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Solution Overview

Problem

Conventional multiport terminals for optical connections are bulky and inflexible, making them unsuitable for smaller spaces, and lack effective mechanisms to prevent damage from inserting non-compatible connectors.

Innovation Solution

Terminals with distinct single-fiber and multi-fiber connection ports that inhibit damaging insertions of non-compatible connectors, using modular adapter sub-assemblies and securing features to ensure quick and secure optical connections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple receptacles are mounted through the wall of the housing to allow outdoor hardened connectors to mate with indoor connectors, then optical connections can be made in outdoor applications, but the housing becomes bulky and inflexible

Engineering Contradiction:

Improveoptical connection capabilityVSAvoidhousing size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The patent transitions from mounting receptacles through the wall of the housing (external dimension) to integrating the adapter assembly within the housing (internal dimension). This allows the optical connection functionality to be maintained while significantly reducing the external dimensions and bulkiness of the housing.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent combines multiple separate components (receptacles, adapters, connectors) into a single integrated adapter assembly that is mounted within the housing. This merging of components eliminates the need for multiple wall-mounted receptacles and reduces the overall housing size while maintaining optical connection capabilities.

Inventive Principle:

Principle #5Merging (Combining)

2Ease of manufacture

If all receptacles have the same connector interface to simplify manufacturing, then manufacturing is easier, but incompatible connectors can be mistakenly inserted causing damage

Engineering Contradiction:

Improvereceptacle manufacturingVSAvoidconnector damage risk

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent applies different connector interface types to different adapter assemblies within the same housing. Each adapter assembly is designed with a specific connector type (e.g., SC, LC, FC) that is locally optimized for its intended use, preventing incompatible connectors from being inserted while maintaining manufacturing simplicity through standardized adapter designs.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses asymmetric connector interfaces with different physical characteristics (shape, size, keying features) for different fiber types. This asymmetry ensures that only compatible connectors can be physically inserted into the correct receptacle, eliminating the risk of damaging incompatible connectors while still allowing for straightforward manufacturing of each specific adapter type.

Inventive Principle:

Principle #4Asymmetry

3Reliability

If space is allocated for turning coupling nuts or bayonets to secure hardened connectors, then connectors can be securely mounted, but the housing becomes even bulkier

Engineering Contradiction:

Improveconnector securityVSAvoidhousing size

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent replaces traditional mechanical securing mechanisms (coupling nuts, bayonets requiring rotational movement) with push-button or snap-fit latching mechanisms. This substitution eliminates the need for additional space required for turning nuts or bayonets, maintaining connector security while significantly reducing the housing dimensions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent moves the connector securing mechanism from an external radial mounting approach (requiring circumferential space for nut/bayonet operation) to an internal linear mounting approach within the housing. This dimensional change allows secure connector mounting without requiring additional external space for mechanical operation.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12517306B2Terminals having a multi-fiber optical connection port that inhibits damage from single-fiber connectors

Publication Date: 2026.01.06 CORNING RES & DEV CORP

AI summary

Terminals are disclosed having at least one first connection port intended for mating with a first connector footprint and at least one second connection port intended for mating with a second connector footprint where the second connection port inhibits the damaging insertion of the external connector suitable for the first connection port. For instance, terminals may have at least one single-fiber connection port that can receive and optically mate with a single-fiber plug connector, and at least one multi-fiber optical connection port that can receive and optically mate with a multi-fiber plug connector and inhibits the damaging insertion of the non-compatible single-fiber connector into the multi-fiber optical connection port if mistakenly attempted by the technician. Other embodiments may include a modular adapter sub-assembly for the first connection port or the second connection port.