Fiber Optic Cassette Locking Mechanism for Higher Fiber Density

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Solution Overview

Problem

Existing fiber optic cassettes face challenges in maximizing fiber density due to space constraints caused by attachment mechanisms, limiting the ability to accommodate increased fiber capacity and density within data center racks.

Innovation Solution

A new cassette locking system that enhances the internal space utilization by incorporating a novel locking mechanism, allowing for higher fiber density through optimized adapter placement and cable management, including a cassette lock with a cross-bar and retraction mechanism to facilitate easy installation and removal from fiber enclosure systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If traditional attachment mechanisms are used in fiber optic cassettes, then the cassette can be installed and removed from fiber enclosure systems, but the internal space utilization is reduced, limiting fiber density

Engineering Contradiction:

Improvefiber densityVSAvoidinternal space utilization

Core Design Contradiction:

Quantity of substanceVSVolume of stationary object

Solution Approach 1:

The attachment mechanism is divided into separate components: a cassette lock with cross-bar that engages with slots in the fiber enclosure rails. This segmentation allows for more compact design and better space utilization within the cassette body, enabling higher fiber density while maintaining installability and removability.

Inventive Principle:

Principle #1Segmentation

2Productivity

If smaller adapters (LC or MPO) are used to increase fiber capacity, then data center rack space is minimized, but the attachment mechanisms occupy more relative space, further limiting available area

Engineering Contradiction:

Improvefiber capacity per rack spaceVSAvoidavailable adapter area

Core Design Contradiction:

ProductivityVSArea of stationary object

Solution Approach 1:

The cassette lock utilizes a vertical engagement dimension with the fiber enclosure rails through cross-bar and slot interaction. This dimensional approach allows the attachment mechanism to occupy vertical space rather than horizontal space, maximizing the horizontal area available for high-density adapter placement.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Ease of operation

If more space is allocated to attachment mechanisms for easier installation, then the cassette can be easily installed and removed, but less space remains for fiber optic components

Engineering Contradiction:

Improveinstallation easeVSAvoidfiber density

Core Design Contradiction:

Ease of operationVSQuantity of substance

Solution Approach 1:

The cross-bar and slot mechanism acts as an intermediary between the cassette and fiber enclosure rails, providing a simple engagement interface that requires minimal space. The latch mechanism provides tactile feedback and audible confirmation, ensuring easy operation without requiring large attachment components.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP3654081B1Fiber optic cassette

Publication Date: 2025.10.29 PANDUIT CORP

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AI summary

A cassette configured to be installed in a fiber enclosure system. The cassette includes a base, a first wall including a first front post, a second wall including a second front post, and a front wall with an opening including an adapter configured to connect to at least one fiber optic cable. The cassette further includes a latch located on the first wall configured to releasably connect the cassette to the fiber enclosure system, where a cassette lock is configured to retract the latch when the lock is actuated away from a rear of the cassette and deploy the latch when the lock is actuated toward the rear of the cassette.