Automatic Tensioning Side Track Assembly for Retractable Screens
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Solution Overview
Problem
Existing retractable screen assemblies face issues with maintaining tension over extended periods due to external shear and tension forces, leading to a baggy appearance and potential operational failures, particularly due to magnet corrosion and inadequate tracking mechanisms.
Innovation Solution
An automatic tensioning side track assembly with oppositely charged magnets and L-shaped prongs that adjust to maintain screen tension, featuring sealed magnet channels to prevent corrosion and a dynamic screen receiver that automatically returns to a desired tensioned state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnets are used in open channels to provide magnetic tensioning, then the tensioning function is achieved, but the magnets are exposed to ambient atmospheric elements causing corrosion and reduced useful life
Solution Approach 1:
A non-magnetic intermediary material (such as plastic or coated barrier) is introduced between the magnets and the corrosive environment. This intermediary protects the magnets from direct contact with water, debris, salt, and chlorine while still allowing the magnetic field to pass through and perform the tensioning function.
Solution Approach 2:
The patent employs a replaceable magnet assembly or protective covering that can be easily replaced when worn or corroded. This allows the system to maintain reliability by substituting the compromised magnetic components rather than replacing the entire side track assembly.
2Reliability
If the side track assembly is made larger to provide better screen retention and tensioning, then screen stability is improved, but material usage and cost increase
Solution Approach 1:
The patent replaces purely mechanical retention systems (such as physical clips or mechanical fasteners) with a magnetic field-based retention system. The magnetic field provides continuous tensioning and screen edge retention without requiring additional mechanical components, thereby reducing material usage while maintaining or improving retention reliability.
Solution Approach 2:
The patent optimizes the magnetic field strength, magnet spacing, and magnet configuration to achieve effective screen tensioning with minimal material. By carefully controlling these parameters, the system provides adequate retention forces without requiring an oversized side track assembly.
3Ease of operation
If magnets are used to automatically tension the screen, then manual adjustment is eliminated, but the complexity of the side track assembly increases
Solution Approach 1:
The patent integrates the magnetic tensioning components directly into the side track assembly structure itself, rather than adding them as separate external components. The magnets are embedded within the side track or screen receiver, merging the tensioning function with the structural elements already present in the system.
Solution Approach 2:
The side track assembly is designed to perform multiple functions: structural support, screen guidance, and magnetic tensioning. By making the side track multi-functional, the patent eliminates the need for separate manual adjustment mechanisms while keeping the overall system complexity manageable through functional integration.
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 effectively maintains a retractable screen at a desired tensioned state, reducing material costs and weight while preventing magnet corrosion, ensuring the screen remains flat and functional under external forces.
Implementation Method 1
a first magnet being engaged with the dynamic screen receiver, a second magnet being engaged with the stationary base track... the first magnet is oppositely charged relative to the second magnet and is configured to maintain an attractive magnetic force with the second magnet
Data Source
AI summary
An automatic tensioning side track assembly includes a stationary base track, a dynamic screen receiver, a first magnet, a second magnet, and a screen. The first magnet is oppositely charged relative to the second magnet and is configured to maintain an attractive magnetic force with the second magnet. The first magnet is disposed at a first position associated with a first rectilinear horizontal distance away from the second magnet when the screen is at a substantially planar configuration and has a desired tensioned state. The first magnet is disposed at a second position associated with a second rectilinear horizontal distance away from the second magnet when the screen is at a substantially bowed configuration and has an undesired tensioned state. The first magnet is configured to automatically return from the second position to the first position after the screen is displaced to the substantially bowed configuration.