Vehicle Window Shade Assembly with Selective Tab Coupling
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Solution Overview
Problem
In vehicles like passenger aircraft, dual retractable window shades independently movable can lead to sudden light flooding when the lighter shade is retracted before the darker shade, causing discomfort to passengers.
Innovation Solution
A dual retractable window shade assembly with an opaque and a transparent shade, each having a tab at the bottom end, configured for selective integration to enable dependent and independent movement, ensuring the transparent shade is automatically drawn when the opaque shade is retracted, preventing unintended light flooding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If dual retractable window shades are made independently movable, then ease of operation is improved, but light control reliability deteriorates due to sudden light flooding
Solution Approach 1:
The patent implements a nested structure where the first tab of the opaque shade is received within the second tab of the transparent shade. This nesting arrangement creates a mechanical dependency where retraction of the opaque shade automatically triggers retraction of the transparent shade, ensuring reliable light control while maintaining ease of operation through a single-user interaction.
2Illumination intensity
If the lighter shade allows light passage, then illumination intensity is improved, but sudden light flooding occurs when retracted independently
Solution Approach 1:
The patent employs preliminary action by designing the tab integration mechanism so that the transparent shade is automatically drawn along with the opaque shade during retraction. This preliminary coupling ensures that the transparent shade is already in position to filter light before the opaque shade fully retracts, preventing sudden light flooding while maintaining the ability to control illumination intensity.
Data Source
AI summary
A window assembly for use in a vehicle including a window frame including a first end and a second end opposite the first end, and an opaque shade movable relative to the window frame, wherein the opaque shade includes a first tab formed at a bottom end of the opaque shade. A transparent shade is movable relative to the window frame, wherein the transparent shade includes a second tab formed at a bottom end of the transparent shade. The first tab and the second tab are configured for selective integration with each other to enable dependent movement of the opaque shade and the transparent shade with each other, and to enable independent movement of the opaque shade and the transparent shade relative to each other.