Flexible Dust Cover for Optical Module Sealing
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Solution Overview
Problem
Parallel optical communications modules are susceptible to airborne matter such as dust, dirt, and gases entering through openings, which can cause performance issues and damage to components, especially during mixed flow gas tests.
Innovation Solution
A flexible dust cover with elasticity that can be stretched to accommodate the module, then returns to its original shape to tightly grip the module's exterior surfaces, preventing airborne contaminants from entering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an open module design is used to reduce assembly cost and facilitate moisture evaporation, then manufacturing cost and heat dissipation are improved, but the module becomes susceptible to ingress of dust, dirt, gases and other airborne matter
Solution Approach 1:
The patent applies a flexible dust cover made of elastomeric material that stretches over the module openings and conforms to the module's exterior surfaces. This flexible film approach provides effective sealing against airborne matter ingress while maintaining a simple, cost-effective structure that does not interfere with the open module design's manufacturing advantages and heat dissipation capabilities.
2Object-affected harmful factors
If a rigid seal is used to prevent airborne matter ingress, then protection against dust and gases is improved, but the seal cannot accommodate module expansion during MFG testing
Solution Approach 1:
The dust cover utilizes the elastomeric material's ability to change its physical parameters (shape, volume, and dimensional stability) in response to temperature and pressure variations during MFG testing. The material's inherent elasticity allows it to expand and contract with the module while maintaining the seal, thus adapting to thermal expansion without compromising protection.
Solution Approach 2:
The patent employs a dynamic sealing solution where the flexible dust cover can deform and adjust its shape in real-time to accommodate module expansion and contraction during testing. Unlike rigid seals, the elastomeric material dynamically responds to dimensional changes, maintaining continuous contact and sealing effectiveness throughout the testing process.
3Ease of operation
If a flexible dust cover with elasticity is used to accommodate module insertion, then ease of installation is improved, but the cover may not provide sufficient sealing pressure
Solution Approach 1:
The dust cover incorporates curved and contoured surfaces that conform to the module's exterior geometry. This curvature design allows the elastomeric material to distribute sealing pressure evenly across multiple contact points, ensuring reliable sealing while maintaining the flexibility needed for easy installation. The curved surfaces enable the cover to snap into place with adequate sealing force.
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 flexible dust cover effectively seals the module, meeting EIA and MFG testing standards, ensuring high signal integrity and protecting components from airborne matter.
Implementation Method 1
The flexible dust cover has an elasticity that enables the dust cover to be stretched from an original, non-stretched state to a stretched state by applying a stretching force to the dust cover. When the stretching force is no longer being applied to the dust cover, the dust cover attempts to return to the original, non-stretched state.
Data Source
AI summary
A flexible dust cover is provided for use with a parallel optical communications module for preventing airborne matter, such as dirt, dust, and gases from entering the module. The flexible dust cover fits snugly to the module to protect components of the module and the optical pathways of the module from airborne matter. The flexible dust cover has an elasticity that allows it to be temporarily deformed from its original shape to a stretched state by application of a stretching force to enable the module to be inserted into a central opening formed in the cover. The force is then removed, causing the cover to attempt to return to its original, non-stretched shape. When this happens, interior surfaces of the cover form a snug fit about exterior surfaces of the module. This snug fit fills in air gaps in the module that would otherwise be exposed to the environment.