Fiber Reel Assembly With One-Way Rotation for Safe Cable Payout
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Solution Overview
Problem
Technicians face challenges in determining the length of input fiber cable needed for fiber distribution hubs (FDH) to fiber connection points, leading to issues with excess slack or insufficient cable, and conventional FDHs require drop cables to be connected after deployment, risking damage.
Innovation Solution
A fiber optic enclosure assembly with a cable reel that rotates in a controlled direction, allowing drop cables to be connected pre-deployment, using a latching member to prevent recoil and enable secure payout or winding without disturbing connected cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the technician secures the FDH to its permanent location before connecting the input fiber cable, then the installation process is simplified and time is saved, but the adapter plate rotates with the spool when the input fiber cable is deployed, which would damage the drop cables that cannot be connected yet
Solution Approach 1:
The adapter plate is separated from the spool, allowing the spool to rotate independently for cable deployment while the adapter plate remains stationary to hold drop cables securely. This segmentation resolves the contradiction by enabling both early FDH installation and safe drop cable connection.
Solution Approach 2:
A stationary adapter plate acts as an intermediary between the rotating spool and the drop cables. The adapter plate provides a stable mounting surface for drop cables while the spool rotates independently to deploy the input fiber cable, preventing damage to the drop cables.
2Productivity
If the technician approximates the length of input fiber cable too short, then the installation process is faster, but the cable must be spliced which increases complexity and potential failure points
Solution Approach 1:
The system allows the technician to install the FDH and prepare drop cables in advance without needing to know the exact cable length. The reel controller enables the spool to rotate only in the unwinding direction, allowing the technician to deploy the exact amount of cable needed without splicing, thus maintaining installation speed while avoiding additional complexity.
3Reliability
If the technician approximates the length of input fiber cable too long, then the cable is sufficient for deployment, but excess slack must be stored which introduces unwanted bends and bend loss
Solution Approach 1:
The reel controller dynamically controls the spool rotation to unwind cable only in the intended direction, preventing over-deployment. This dynamic control allows the technician to deploy the exact cable length needed, avoiding excess slack and associated bend losses while ensuring sufficient cable for the connection.
4Ease of operation
If the cable reel is allowed to rotate freely in both directions, then the reel is easier to operate, but the cable cannot be prevented from unwinding in the wrong direction which causes installation errors
Solution Approach 1:
The reel controller applies preliminary anti-action by preventing rotation in the wrong direction before cable deployment errors can occur. The controller allows the spool to rotate only in the unwinding direction, ensuring precise cable deployment while maintaining ease of operation through simple directional control.
Data Source
AI summary
A fiber optic enclosure assembly for housing optical fiber connections includes: a housing portion; a bearing mount portion disposed within the housing portion; and a cable reel portion disposed within the housing portion. The cable reel portion is configured to be engaged with the bearing mount portion such that the cable reel portion selectively rotates; the cable reel portion is configured to be selectively rotatable in only a counterclockwise direction or only in a clockwise direction depending on the position of a latch portion; and the position of the latch portion is configured to permit the cable reel portion to rotate in only a selected one of the counterclockwise direction and the clockwise direction such that a cable can be paid out from the cable reel portion or wrapped onto the cable reel portion and the cable is prevented from unwinding in a direction opposite to the selected direction.