Optical Fiber Unit Coating Spiral Opening Disassembly
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Solution Overview
Problem
Existing optical fiber units risk damaging internal fibers when being disassembled due to accidental tightening of bundle materials, especially when high-density mounting and side pressure are applied, leading to microbend loss.
Innovation Solution
An optical fiber unit with a coating having a Young's modulus of 400 MPa or less, formed from a thermoplastic or ultraviolet curing resin, and featuring a spiral opening that allows for easy deformation and disassembly without tightening, ensuring the internal fibers can be extracted without damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If bundle materials are wound in a spiral shape and bonded at intersections to secure the optical fiber assembly, then the structural stability is improved, but the ease of disassembly deteriorates due to accidental tightening and potential fiber damage
Solution Approach 1:
The invention extracts the harmful bonding function from the bundle materials by removing the adhesive coating. This allows the bundle materials to be easily separated from the optical fiber assembly during disassembly without causing fiber damage, while still providing structural stability through the spiral winding configuration alone
Solution Approach 2:
The invention segments the binding function into two parts: the spiral winding provides structural stability while the adhesive bonding is completely removed. This segmentation allows the bundle materials to maintain positioning function without the harmful tightening effect that occurs with bonded intersections
2Productivity
If the optical fiber unit is mounted with high density, then the productivity is improved, but the reliability deteriorates due to side pressure causing bundle material tightening and microbend loss
Solution Approach 1:
The invention converts the potential harm of side pressure into a beneficial effect by removing the adhesive bonding. When side pressure is applied during high-density mounting, the non-bonded bundle materials can flex and deform without tightening, actually protecting the optical fibers from microbend loss while maintaining mounting density
3Stability of the object's composition
If adhesive is applied to bundle materials to prevent loosening, then the stability is improved, but the ease of repair deteriorates due to difficulty in removing bonded materials
Solution Approach 1:
The invention extracts the adhesive component entirely from the bundle material structure. The bundle materials rely solely on their spiral winding configuration for stability, which can be easily unwound and removed during repair without the complications of adhesive removal, while still preventing loosening through proper winding tension
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 solution enables easy extraction of optical fibers without damage and allows for high-density mounting by preventing the bundle material from tightening, thus reducing microbend loss and facilitating the disassembly process.
Implementation Method 1
a coating 30 for covering the periphery of the assembly 20... an outer shape of the optical fiber unit can be easily deformed
Implementation Method 2
formed from a thermoplastic or ultraviolet curing resin
Implementation Method 3
formed from a thermoplastic or ultraviolet curing resin
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
An optical fiber unit includes: an assembly in which a plurality of optical fiber ribbons in which a plurality of optical fibers are disposed in parallel are assembled; and a coating for covering the periphery of the assembly in a state of having a space inside. The coating is interrupted at a part in a circumferential direction of the optical fiber unit, and an opening part is formed.