Sun Shade Webbing Tensioning Guide Rail Mechanism
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Solution Overview
Problem
Existing sun protection devices face challenges with central tensioning systems that are complex, difficult to readjust at the site of use, require pre-assembled and stretched transport, and are prone to misalignment due to varying strap lengths.
Innovation Solution
A sun protection device with a guide rail, tension roller, and spring system that allows for on-site webbing tensioning using a single strap per guide rail, preventing skewing and enabling easy handling and installation, featuring a belt pulley and deflection rollers for optimal fabric guidance and tensioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a central tensioning system is used, then the webbing can be tensioned, but the device becomes complex and difficult to readjust at the site of use
Solution Approach 1:
The invention divides the tensioning system into separate modules at each guide rail position. Each guide rail has its own independent tensioning roller and spring mechanism, allowing individual webbing sections to be tensioned separately. This segmentation eliminates the need for a complex centralized tensioning system while maintaining reliable webbing tensioning capability.
Solution Approach 2:
Each guide rail module is equipped with its own spring-loaded tensioning roller that automatically maintains webbing tension. The springs provide self-regulating tensioning force, eliminating the need for external tensioning devices or complex mechanical systems. This self-service mechanism simplifies the overall device while ensuring reliable webbing tensioning.
2Reliability
If the webbing is pre-assembled and stretched at the factory, then tensioning is achieved, but transport becomes complicated and expensive
Solution Approach 1:
The invention uses spring-loaded tensioning rollers that can be easily assembled and adjusted on-site. The springs provide dynamic tensioning capability without requiring pre-stretched webbing. This allows the sun protection device to be transported in a compact, unassembled state and then quickly deployed with proper webbing tensioning at the installation location, significantly reducing transport complexity and costs.
Solution Approach 2:
The spring mechanisms are pre-installed in the guide rails during manufacturing, but the webbing tensioning action is deferred until on-site installation. This allows the device components to be transported in a relaxed, compact state and then tensioned in place, avoiding the need for pre-assembled and pre-stretched webbing that would complicate transport.
3Area of stationary object
If multiple straps are used in a central tensioning system, then coverage is improved, but misalignment occurs due to different lengths
Solution Approach 1:
Instead of using multiple straps in a centralized system that require precise matching of lengths, the invention segments the tensioning function across multiple independent guide rail modules. Each module handles its own webbing section with its own tensioning roller, eliminating alignment issues between different strap lengths while maintaining comprehensive sun protection coverage.
Solution Approach 2:
Each guide rail module is independently configured with its own tensioning roller and spring mechanism, allowing local adjustment and optimization for each section of webbing. This local quality approach ensures that each webbing section is properly tensioned and aligned independently, preventing misalignment problems that occur in centralized systems with multiple straps of different lengths.
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
This solution simplifies webbing tensioning and installation, reduces transport costs, and ensures consistent tensioning without misalignment, allowing for efficient and effective sun protection deployment.
Implementation Method 1
A spring is accommodated in the guide rail running in the longitudinal direction. A first end of the spring is connected to the idler pulley while a second end of the spring is connected to the guide rail.
Data Source
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AI summary
The invention relates to a tensioning device (10) for a sunshade device comprising a fabric roller (20) and at least one guide rail (30). The guide rail (30) has a webbing (40), a tensioning roller (50), and a spring (60). The webbing (40) is connected at a first end (41) to a fabric that can be rolled up around the fabric roller (20) and at a second end (42) can be wound onto a pulley (70) that can be connected to the fabric roller (20). The tensioning roller (50) is mounted in the guide rail (30) so as to be slidably in the longitudinal direction and deflects the webbing (40) between its two ends (41, 42). The spring (60) is mounted longitudinally in the guide rail (30) and is connected at a first end (61) to the tensioning roller (50) and at a second end (62) to the guide rail (30).