Optical Cable Junction Box Layout for Compact Fiber Routing
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Solution Overview
Problem
Existing optical junction boxes for FTTx networks are space-consuming, complex, and prone to fiber damage due to undesired bending, complicating fiber management and maintenance operations.
Innovation Solution
An optical cable junction box design featuring a base, a support frame with transversely extending splice trays and adapters, optimizing fiber arrangement to reduce space consumption and minimize fiber damage risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If adapters are attached with a support structure to the main spine in a raised position with respect to the splice tray, then fiber connections can be established, but the optical cables are forced to a long route causing bending and space consumption
Solution Approach 1:
The patent transitions from a vertical arrangement (raised position perpendicular to spine) to a horizontal arrangement (adapters along the spine length). This dimensional change allows adapters to be positioned at the same level as the splice tray, eliminating the need for vertical clearance and reducing the cable routing path length, thereby decreasing space consumption while maintaining connection capability
2Volume of moving object
If connectors are inserted parallel to the spine length, then space is saved, but attention must be paid to the curvature of the fiber exiting from the adapter
Solution Approach 1:
The patent introduces a dedicated fiber routing path with proper curvature guidance as an intermediary element between the adapter and the splice tray. This routing path acts as a mediator that accommodates the fiber's natural curvature requirements, allowing connectors to be inserted parallel to the spine length while preventing fiber damage through properly designed bending radius
3Adaptability or versatility
If vertical development and specific splice trays are used, then fiber splicing capacity is increased, but fiber management problems arise and space is consumed
Solution Approach 1:
The patent segments the fiber management function by providing dedicated routing paths and attachment points distributed along the spine structure. Each segment handles specific fiber routing tasks, making the overall system more manageable. The splice trays are positioned to work with the horizontal adapter arrangement, creating modular sections that simplify fiber management while maintaining high splicing capacity
Data Source
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AI summary
An optical cable junction box (1) comprising a base member (10) configured to receive optical cables (2) comprising one or more optical fibers (3); a dome-shaped cover member (20) configured to define with the base member (10) an inner volume (V); a support frame (30) extending into the inner volume (V) between the base member (10) and an end support portion (31) along a longitudinal direction (X-X) transversal to the base member (10); a splice tray arrangement (40) attached to the support frame (30) extending from the support frame (30) along a first direction (A-A) transversal to the longitudinal direction (X-X), the splice tray arrangement (40) comprising one or more splice trays (41) configured to receive one or more optical fibres (3); one or more optical adapters (50) for receiving one or more pre-connectorized optical cable connectors (4) and optical connectors (5) for optical fibers (3), the optical adapters (50) being attached to the support frame (30) and being arranged along a second direction (B-B) transversal to the longitudinal direction (X-X).