Fiber Distribution Cabinet Layout for Wider Access and Fiber Protection
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Solution Overview
Problem
Current fiber distribution hubs have limited working space due to a single hinged door design, leading to increased risk of fiber breakage and longer installation times, and lack a method to replace damaged cabinets without interrupting service.
Innovation Solution
A cabinet with multiple doors that open to maximize workspace, a rack with adjustable arms and a strain relief system using slots with cushioning material to keep fibers parallel, and a gravity-fed latch for easy rack positioning, allowing for replacement of the outer shell without disturbing connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single hinged door design is used, then the cabinet size is minimized, but the working area inside the cabinet is limited
Solution Approach 1:
The cabinet door is divided into multiple hinged panels that can be opened independently or together. This segmentation allows the working area to be accessed progressively while maintaining a compact closed cabinet size. Each panel provides additional access to different sections of the cabinet interior.
2Area of stationary object
If a single hinged door design is used, then the cabinet size is minimized, but the risk of accidental fiber breakage increases
Solution Approach 1:
The multi-panel hinged door allows workers to open only the specific section needed for the task, rather than opening the entire cabinet. This reduces the exposed working area and minimizes the risk of accidentally contacting or breaking existing fiber connections in areas not being worked on.
3Area of stationary object
If a single hinged door design is used, then the cabinet size is minimized, but the installation time increases
Solution Approach 1:
The segmented door design allows workers to access different sections of the cabinet efficiently by opening only the necessary panels. This improves workflow and reduces installation time compared to opening a large single door or working through limited access points.
4Ease of operation
If rings and guides are used to concentrate pigtails, then the pigtails are organized at discrete locations, but the pigtails become kinked and crossed
Solution Approach 1:
A cushioning material is introduced as an intermediary element between the rigid rings/guides and the flexible optical fibers. This cushioning layer allows the fibers to be organized and supported without direct contact with hard edges that cause kinking and crossing.
5Ease of operation
If rings and guides are used to concentrate pigtails, then the pigtails are organized at discrete locations, but the lateral and tensile stresses on the pigtails increase
Solution Approach 1:
The cushioning material acts as a stress-distributing intermediary between the organizing structure and the optical fibers. It prevents concentrated lateral and tensile stresses by providing a soft, compliant surface that supports the fibers during organization and installation.
6Reliability
If the cabinet is replaced due to damage, then the damaged cabinet is replaced, but the service to customers is interrupted
Solution Approach 1:
The cabinet is designed with a removable outer shell that can be separated from the internal rack and connection components. This allows the shell to be replaced independently without disturbing the optical fiber connections, enabling maintenance without service interruption.
7Quantity of substance
If the pigtail group gets larger, then more connections are made, but the sag of the pigtail grouping increases
Solution Approach 1:
The cushioning material provides continuous support along the pigtail grouping, preventing sag even as the number of pigtails increases. It distributes the weight and maintains proper fiber geometry without causing kinks or excessive tension.
Data Source
AI summary
Provided is a cabinet including an outer shell having a plurality of doors, disposed such that edges of the plurality of doors form a corner of the outer shell when the doors are in a closed position; wherein, if the doors are open, continuous access is obtained to a plurality of working surfaces.