Optical Fiber Connector Dust Cap With Snap-Fit Hermetic Sealing
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Solution Overview
Problem
Optical fibers are exposed during installation and maintenance, leading to contamination and damage, and existing dust caps are not effectively sealed or easy to install/remove, complicating fiber routing through confined spaces.
Innovation Solution
A removably installed dust cap with a snap-fit connection, providing a hermetic seal and easy installation/removal, suitable for use with multi-fiber connectors, and designed for easy conveyance through ducts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dust cap is fitted over the end of the fiber optic connector to protect exposed optical fibers, then protection from contamination and damage is improved, but installation and removal becomes complex and time-consuming
Solution Approach 1:
The dust cap is divided into a two-part structure: a cap body that covers the connector end and a separate latch mechanism that secures it. The latch includes a body portion and a tail portion that can be accessed from the exterior, allowing the cap to be segmented for easy engagement and disengagement without complex tools or procedures
Solution Approach 2:
The latch acts as an intermediary mechanism between the cap body and the connector. It provides a simple interface where pulling the tail portion of the latch mediates the entire removal process, automatically disengaging the cap from the connector without requiring manual manipulation of the cap itself
2Reliability
If a secure connection is provided between dust cap and connector, then protection reliability is improved, but force required for installation and removal increases
Solution Approach 1:
The connection mechanism is segmented into distinct functional elements: the latch body that engages with the connector, the tail portion for actuation, and the cap body. This segmentation allows the connection to be secure during normal operation while enabling easy release through a small force applied to the tail portion
Solution Approach 2:
The latch transition from a static secure connection to a dynamic release mechanism. During installation, the latch provides a firm secure connection. During removal, pulling the tail portion dynamically changes the latch state, allowing it to disengage from the connector with minimal force
3Ease of manufacture
If the dust cap structure is simplified for easy molding, then manufacturing cost is reduced, but sealing effectiveness may be compromised
Solution Approach 1:
The dust cap is constructed as a flexible polymeric shell that can be molded as a single piece. The flexibility of the polymeric material allows the cap body to conform to the connector end and provide an effective seal, while the simple shell structure remains easy to manufacture using standard molding techniques
Solution Approach 2:
The dust cap utilizes polymeric materials that combine molding ease with sealing effectiveness. The polymeric construction allows for simple injection molding while providing the necessary flexibility and sealability through material properties rather than complex structural features
Data Source
AI summary
A dust cap for capping an optical fiber connector. In another embodiment, an assembly including an optical fiber connector subassembly and a dust cap. The dust cap includes structural features that can optimize one or more aspects of the dust cap, such as case of use, robustness, and the dust cap's ability to inhibit ingress of contaminants that can damage ends of optical fibers within the dust cap.