Fiber Optic Cabinet Strain Relief Assembly for High-Density Duct Routing

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Solution Overview

Problem

Current fiber optic cable management solutions face challenges in efficiently organizing and mounting cables and ducts, particularly in providing adequate strain relief, which complicates operator workloads and limits the number of cables that can be accommodated in cabinets.

Innovation Solution

A fiber optic cabinet with a duct-cable management system featuring a base plate with apertures, a strain relief assembly with alignment elements and grooves, and a demountable door system that facilitates easier mounting and strain relief for multiple ducts and cables, allowing up to 24 ducts with 12 mm outer diameter and miniducts with 5 mm outer diameter to be accommodated.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If traditional hose clamps and plastic organizational elements are used to manage ducts and cables, then strain relief is provided and organization is achieved, but the number of cables that can be accommodated is limited and operator workload increases

Engineering Contradiction:
Improvenumber of cables accommodatedVSAvoidoperator workload
Core Design Contradiction:
Quantity of substanceVSEase of operation

Solution Approach 1:

The strain relief assembly is divided into multiple independent groove structures (first grooves, second grooves, third grooves) that can simultaneously accommodate multiple ducts. Each groove acts as an independent strain relief point, allowing parallel organization of numerous cables without increasing operational complexity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The strain relief assembly serves multiple functions simultaneously: it provides strain relief through groove structures, organizes multiple ducts through aligned positioning, and accommodates various duct sizes (including miniducts) within the same cabinet space, thereby increasing cable capacity without proportionally increasing workload

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Quantity of substance

If more ducts and cables are mounted in the cabinet, then cable capacity increases, but strain relief becomes more difficult to provide adequately

Engineering Contradiction:
Improvenumber of ducts accommodatedVSAvoidstrain relief adequacy
Core Design Contradiction:
Quantity of substanceVSReliability

Solution Approach 1:

The strain relief assembly incorporates multiple separate groove structures (first grooves for initial strain relief, second grooves for alignment, third grooves for additional strain relief) that can independently accommodate and relieve strain from multiple ducts simultaneously, maintaining reliability even as cable quantity increases

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The groove structures act as intermediary elements between the ducts and the cabinet interior, providing a mechanical interface that distributes and relieves strain across multiple contact points, ensuring adequate strain relief for numerous ducts without compromising individual duct protection

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentEP3861392B1Fiber optic cabinets having cable and duct management systems
Publication Date: 2026.02.11 CORNING RES & DEV CORP
  • EP3861392B1 patent drawingFigure 1
  • EP3861392B1 patent drawingFigure 2A~2B
  • EP3861392B1 patent drawingFigure 3A~3B

AI summary

A cabinet for fiber optic cable and duct management, including a cabinet body, and a duct-cable management system, defined in a cavity of the cabinet body, the system including a strain relief assembly, having at least two pair of alignment elements, with each alignment element having a plurality of strain relieving grooves.