Tension Adjustable Retractable Screen Track Assembly
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Solution Overview
Problem
Existing retractable screen track assemblies are difficult to adjust after installation, requiring professional skills and tools, and do not easily accommodate irregular building surfaces or existing track systems, leading to installation challenges and inefficiencies.
Innovation Solution
A tension-adjustable screen track assembly with a U-shaped outer track member and an inner track member that is adjustable relative to the outer track, using biasing members and mechanical fasteners to allow easy tension adjustment without disassembly, along with adaptors for attaching to various building surfaces or auxiliary tracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical fastener system with ratchet teeth and cogs is used to lock the inner track, then the screen tension is effectively maintained, but the assembly cannot be easily re-adjusted or disassembled
Solution Approach 1:
The fastening system transitions from a static locked state to a dynamic adjustable state through the cam mechanism. The cam allows the inner track to be pushed inward to tighten the screen, then locked in position, but can also be easily released and re-adjusted by simply pulling the inner track outward, providing both reliable tension maintenance and ease of re-adjustment
Solution Approach 2:
The track assembly is divided into separable components: an outer track member fixed to the building and an inner track member containing the screen. This segmentation allows the inner track to be independently adjusted within the outer track, enabling tension adjustment without affecting the entire assembly or requiring disassembly of the outer track
2Manufacturing precision
If the track assembly is manufactured with tight tolerances to ensure proper fit, then the screen tension is optimized, but manufacturing complexity and cost increase
Solution Approach 1:
The system uses the adjustable inner track within the outer track to compensate for manufacturing tolerances. Rather than requiring both tracks to be manufactured with extremely tight tolerances, the design allows for post-installation adjustment of the inner track position, accommodating variations in building surfaces and manufacturing tolerances without increasing manufacturing complexity
Solution Approach 2:
The system allows for changes in the positional parameter of the inner track relative to the outer track. By enabling the inner track to move and be repositioned within the outer track, the system can accommodate variations in installation conditions and manufacturing tolerances without requiring high-precision manufacturing of both components
3Reliability
If the inner track is pushed inward to tighten the screen, then proper screen tension is achieved, but the assembly cannot be easily disassembled or re-adjusted
Solution Approach 1:
The fastening mechanism provides a dynamic system where the inner track can be easily moved inward to tighten the screen and locked in place, but can also be easily released and repositioned by simply pulling it outward. This eliminates the need for complex disassembly tools or procedures while maintaining reliable tension
Solution Approach 2:
The cam-based locking mechanism allows the user to easily lock and release the inner track without requiring external tools or professional assistance. The system is designed to be user-serviceable, allowing homeowners to adjust or remove the screen as needed
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
Enables quick and easy tension adjustment of retractable screens by non-skilled individuals, accommodating irregular surfaces and existing track systems, improving installation efficiency and durability while being cost-effective.
Implementation Method 1
a spring member to exert a biasing force to extend the inner track member toward an opening of the outer track member
Data Source
AI summary
A screen track assembly for mounting and tensioning a retractable screen across an opening, the assembly having a generally U-shaped outer track member having an opening; an inner track member received within the outer track member, the inner track member adapted to receive a retractable screen, the inner track member being movable relative to the outer track member; biasing members to present a biasing force to extend the inner track member toward the opening of the outer track member; and adjustable mechanical fasteners to fix the position of the inner track member relative to the outer track member such that the screen may be tightened or loosened as required for proper functionality.