Optical Fiber Cable Ripcord Restraint Using Elastic Reinforcing Sheet
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Solution Overview
Problem
The movement of ripcords in the circumferential direction of optical fiber cables is uncontrolled, making the tearing operation difficult due to the space between the cable main body and the reinforcing sheet.
Innovation Solution
The optical fiber cable design includes a protective layer that partially contacts the cable main body, limiting the ripcord movement by elastic deformation, with specific angle and distance constraints, and overlapping directions to enhance workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a space is formed between the cable main body and the reinforcing sheet to accommodate ripcords, then the ripcords can be disposed in the cable structure, but the ripcords can move in the circumferential direction making the tearing operation difficult
Solution Approach 1:
The protective layer is designed as an elastic thin film that can be deformed to compress the cable main body, creating contact pressure that restrains the ripcords in the circumferential direction while still allowing them to be disposed in the space between the cable main body and reinforcing sheet
Solution Approach 2:
The patent changes the physical state of the protective layer from a rigid structure to an elastic deformable structure, allowing it to dynamically adjust its shape during manufacturing and service to maintain contact with the cable main body and restrain ripcord movement
2Ease of operation
If the protective layer is made to contact the cable main body to limit ripcord movement, then the workability of tearing operation is improved, but the structural complexity increases
Solution Approach 1:
The protective layer serves multiple functions simultaneously: it protects the cable main body, accommodates the ripcords in the space between the cable main body and reinforcing sheet, and through elastic deformation creates contact pressure to restrain ripcord movement in the circumferential direction
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively limits ripcord movement, improving the workability of the tearing operation and maintaining the cable's structural integrity.
Implementation Method 1
a protective layer that accommodates the cable main body in a state of holding an elastic deformation of the cable main body toward an inside of the cable main body
Data Source
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AI summary
An optical fiber cable 1 includes a cable main body 10 that includes an optical fiber 21, a reinforcing sheet 60 and an outer sheath 70 that accommodates the cable main body 10, and a ripcord 50A and 50B that is disposed in a space 65 formed between the cable main body 10 and the reinforcing sheet 60. The reinforcing sheet 60 is in partial contact with the cable main body 10 in a state of holding an elastic deformation of the cable main body 10 toward an inside of the cable main body10.