Vehicle Sunshade Wing Positioning Member Guide Stability
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Solution Overview
Problem
Sunshade assemblies in vehicles with open roof constructions often face issues where the longitudinal edge of the flexible sunscreen can move out of its guide due to wind loads or user error, making it difficult to reposition correctly.
Innovation Solution
A sunshade assembly design featuring a wing that folds inwards around a positioning member to keep the longitudinal edges securely in the guides, with a mechanism allowing the sunscreen to be fully wound and unwound to restore its correct position, utilizing two guide channels and a snap connection between the positioning member and operating beam for stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sunscreen is made flexible to allow winding and unwinding, then the ease of operation is improved, but the longitudinal edge stability deteriorates
Solution Approach 1:
The positioning member acts as an intermediary element between the guide and the sunscreen. It has a first portion that engages with the guide and a second portion that engages with the longitudinal edge of the sunscreen, thereby mediating the connection and ensuring the edge remains positioned in the guide while allowing the sunscreen to be flexible and windable.
2Reliability
If the longitudinal edge is secured in the guide, then the reliability is improved, but the ease of repositioning deteriorates
Solution Approach 1:
The positioning member is segmented into two distinct portions: a first portion that interfaces with the guide structure and a second portion that interfaces with the sunscreen edge. This segmentation allows each portion to be optimized for its specific function - the first portion for secure positioning and the second portion for easy engagement and disengagement with the sunscreen.
3Ease of operation
If the sunscreen is allowed to move freely, then the ease of operation is improved, but the manufacturing precision deteriorates
Solution Approach 1:
The positioning member serves as a precision intermediary that ensures accurate alignment between the sunscreen edge and the guide. The first portion engages precisely with the guide channel while the second portion engages with the sunscreen edge, maintaining manufacturing precision through this mediated connection while allowing operational freedom.
Data Source
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AI summary
A sunshade assembly comprises a flexible sunscreen (4) having opposed longitudinal edges and opposed transversal edges, two opposed longitudinal guides (6,7) for receiving therein and guiding corresponding ones of the opposed longitudinal edges of the sunscreen, a rotatable winding shaft (5) configured for winding an unwinding the sunscreen at first one of its transversal edges, and an operating beam (8) connected to the second one of the transversal edges of the sunscreen. Each of the opposed longitudinal edges of the sunscreen (4) near to the second one of the transversal edges is provided with a wing (17) folded inwards around a positioning member (16) having a stationary position relative to said second transversal edge and extending into a corresponding one of said opposed longitudinal guides (6,7).