Vehicle Roof Drain Channel as a Rollo Cloth Guide
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Solution Overview
Problem
Existing roof systems for vehicles with fixed roofs face challenges in efficiently managing water drainage and panel movement, often requiring multiple components that complicate the design and increase weight, while maintaining a seamless seal and desired panel shape.
Innovation Solution
A roof system with a semi-transparent panel supported by guide rails, incorporating a drain channel that doubles as a rollo cloth guide, reducing the need for separate components by integrating the drain channel within the path of the rollo cloth, and providing sliding surfaces to maintain consistent cloth position and shape during winding/unwinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate rollo guide is added to guide the rollo cloth during winding/unwinding, then the cloth position stability is improved, but the device complexity and number of parts increases
Solution Approach 1:
The patent combines the rollo guide function with the existing drain channel by providing a sliding surface on the drain channel that contacts the rollo cloth. This integration eliminates the need for a separate rollo guide component while maintaining the cloth position stability during winding and unwinding operations.
Solution Approach 2:
The drain channel is given a dual function: it continues to drain water from the roof opening while simultaneously serving as a guide for the rollo cloth through its sliding surface. This multi-functionality reduces the overall number of components in the roof system.
2Reliability
If multiple separate components are used for drainage and panel movement guidance, then each component can be optimized for its specific function, but the overall system weight and complexity increases
Solution Approach 1:
The patent merges the drainage function and the rollo cloth guidance function into a single integrated component (the drain channel with sliding surface). This reduces the total number of parts and consequently decreases the overall system weight while maintaining both functions' effectiveness.
Solution Approach 2:
The drain channel structure is designed to perform multiple functions: water drainage through its channel geometry and rollo cloth guidance through its sliding surface. This multi-functional design eliminates redundant components and reduces system weight.
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 integration reduces the number of parts, minimizes weight, and ensures smooth panel movement, while effectively guiding water drainage without additional frames or guides, enhancing the system's functionality and aesthetics.
Implementation Method 1
a first sliding surface in contact with the rollo cloth to guide it when it is wound up or off
Data Source
AI summary
A vehicle roof system comprises a stationary part configured to be attached to a fixed roof and guide rails extending in longitudinal direction substantially parallel to opposite sides of a roof opening. A semi-transparent panel closes the roof opening and has a drain channel for draining water seeping past at least one edge of the panel. A rollo assembly includes a rollo cloth having a first edge connected to a winding shaft, and a second opposite edge to which a beam is connected and opposite lateral edges guided in the guide rails. The cloth is wound onto the winding shaft and wound off to uncover or cover the panel at least partly from below. At least a part of the channel extends transversely within the path of the cloth and comprises a first sliding surface in contact with the cloth to guide it when it is wound up or off.