Optical Wiring Unit Stepped Walls to Prevent Fiber Sandwiching
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Solution Overview
Problem
Optical fibers can be sandwiched and pressed between a tray and a lid body due to vibration or other forces, leading to increased transmission loss.
Innovation Solution
The optical wiring unit features a tray and lid body configuration with inner and outer wall dimensions designed to minimize sandwiching, along with fiber restricting portions and a clamp system to secure the optical fiber, and a peeling suppressing mechanism to prevent adhesive failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a tray and lid body are combined to form an optical wiring unit, then the structure becomes compact and manageable, but the optical fiber may be sandwiched and pressed between the tray and lid body due to vibration or other forces
Solution Approach 1:
The lid body is segmented into an outer wall portion and an inner wall portion, with the inner wall portion having a smaller dimension in the up-down direction. This segmentation creates a stepped structure that prevents the optical fiber from being sandwiched between the lid body and tray, while maintaining the compact combined structure of the optical wiring unit.
2Device complexity
If the inner wall portion has the same dimension as the outer wall portion, then the structure is simpler, but the optical fiber cannot be prevented from being sandwiched under vibration
Solution Approach 1:
The inner wall portion is designed with a preliminary anti-action structure that proactively prevents the optical fiber from being sandwiched. By creating a stepped configuration where the inner wall portion extends less in the up-down direction than the outer wall portion, the design anticipates and counteracts the sandwiching force before it can damage the optical fiber.
3Reliability
If fiber restricting portions are added to prevent fiber sandwiching, then fiber protection improves, but the device complexity increases
Solution Approach 1:
The fiber restricting function is merged into the lid body structure itself through the inner wall portion design. Rather than adding separate fiber restricting components, the inner wall portion's reduced up-down dimension integrates the protection function directly into the existing lid body, preventing fiber sandwiching without significantly increasing overall structure complexity.
Data Source
AI summary
An optical wiring unit includes: a tray that includes a bottom plate; and a lid body that includes a top plate facing the bottom plate in an up-down direction. An accommodating space that accommodates an optical fiber is formed between the bottom plate and the top plate. one of the tray and the lid body includes: an outer wall portion; and an inner wall portion inside the accommodating space with respect to the outer wall portion. The other of the tray and the lid body includes an intermediate wall portion inserted between the outer wall portion and the inner wall portion. The inner wall portion has a dimension in the up-down direction smaller than that of the outer wall portion.