Vehicle Rear Window Roller Blind Edge-to-Edge Coverage
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Solution Overview
Problem
Existing roller blind arrangements for motor vehicle rear windows often result in a light gap between the blind and the interior paneling due to the trapezoidal shape of the window, which is aesthetically disturbing.
Innovation Solution
A roller blind arrangement with a rotatably mounted shaft positioned next to the lower edge of the window, featuring guide rails that run parallel to the side edges, and a pull-out profile that protrudes laterally into receiving spaces next to the guide rails, ensuring the blind covers the window edge-to-edge without gaps, with additional receiving spaces accommodating the blind's overhang and a flexible leaf spring for smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the roller blind is adapted to the trapezoidal shape of the rear window, then the blind does not collide with the interior paneling, but a light gap appears between the blind and the interior paneling
Solution Approach 1:
The blind is designed to extend beyond the trapezoidal contour in the lateral dimension, protruding into the receiving spaces between the guide rails and interior paneling. This dimensional extension allows the blind to maintain a rectangular shape while achieving edge-to-edge coverage, eliminating the light gap without colliding with the paneling.
Solution Approach 2:
The blind's lateral extensions are nested within the receiving spaces formed by the guide rail arrangement. The guide rails create cavities that accommodate the blind's overhang, allowing the blind to occupy the space between the guide rails and interior paneling, thus closing the light gap without interfering with the paneling.
2Object-affected harmful factors
If the roller blind width is increased to cover the entire window edge-to-edge, then the light gap is eliminated, but the blind structure becomes more complex
Solution Approach 1:
The guide rails serve multiple functions: they guide the pull-out profile during blind operation, define the lateral boundaries of the blind, and create receiving spaces that accommodate the blind's lateral extensions. This multi-functionality allows the system to achieve edge-to-edge coverage without adding separate structural elements for each function.
Solution Approach 2:
The guide rails and receiving spaces are merged into a single integrated structure. The guide rails simultaneously provide guidance and create the cavities that receive the blind's lateral extensions, combining two structural elements into one and simplifying the overall system while achieving the desired coverage.
3Ease of manufacture
If guide rails are integrated into the interior paneling, then the installation is simplified, but the aesthetic appearance is compromised due to visible gaps
Solution Approach 1:
The blind's lateral extensions act as intermediaries that fill the space between the guide rails and interior paneling. These extensions are received in the receiving spaces, creating a visual bridge that conceals the gap and provides a smooth aesthetic transition from the blind to the side paneling, while the guide rails remain integrated into the paneling for simplified installation.
Data Source
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AI summary
The arrangement has a pull-out profile guided in two guide bars (22,23), and a roller track (19) whose edge is fastened to a winding shaft, where a side edge of the track is held behind an interior lining. The width of the track measured parallel to the shaft is larger than the distance of the guide bars from each other in a position which corresponds to a complete shading of the track before a motor vehicle window.