Curved Guide Body Sunshade Actuation for Compact Vehicle Windows
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Solution Overview
Problem
Conventional sunshade actuation devices for vehicle windows require a large mounting space and are not lightweight due to the non-parallel guide rails, which limits design freedom and increases vehicle weight, and they have dead space between the rails that cannot be utilized effectively.
Innovation Solution
A sunshade actuation device with a curved guide body and a pivoting arm member that extends in a single guide body, allowing for a longer screen draw-out length while maintaining a compact and lightweight design, and includes features like an escape device to manage entanglements and a tapered roller member to absorb differences in drawing and moving centers, preventing wrinkles and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If non-parallel guide rails are used to enable arm member pivoting, then screen draw-out length is increased, but device size and weight increase
Solution Approach 1:
The patent merges the guide rail and arm member into a single integrated guide body structure. The guide body contains both the guiding function and the pivoting function that were previously separated into guide rails and arm member, eliminating redundant components and reducing overall device weight while maintaining the screen draw-out length.
Solution Approach 2:
The guide body uses a curved guide groove instead of straight non-parallel guide rails. The curved groove allows the arm member to pivot smoothly while being guided along a predetermined path, achieving the same functional effect as non-parallel rails but with a more compact and lightweight curved structure.
2Length of moving object
If non-parallel guide rails are used to enable arm member pivoting, then screen draw-out length is increased, but mounting space increases
Solution Approach 1:
The guide rail and arm member are merged into a single guide body, eliminating the space required for separate parallel guide rails. This integration significantly reduces the mounting space while preserving the screen draw-out length through the curved guide groove design.
Solution Approach 2:
The curved guide groove in the guide body allows the arm member to pivot and extend the screen draw-out length within a compact curved path, achieving the same functional effect as non-parallel rails but occupying significantly less mounting space.
3Area of stationary object
If parallel guide rails are used to reduce device size, then mounting space is reduced, but screen draw-out length is limited
Solution Approach 1:
The curved guide groove replaces straight parallel guide rails, enabling the arm member to follow a curved path that extends the screen draw-out length while maintaining a compact mounting footprint. The curvature allows pivoting motion without requiring non-parallel rail configuration.
4Reliability
If complex escape devices are added to manage entanglements, then reliability is improved, but device complexity increases
Solution Approach 1:
The escape function is extracted as a simple geometric feature (escape groove) from the guide body rather than adding a complex mechanical escape device. This extracted feature allows the arm member to automatically escape entanglement through the curved guide groove geometry without additional components.
Solution Approach 2:
The curved guide groove automatically provides escape functionality through its geometry. When the arm member encounters an obstacle or entanglement, the curved path naturally guides it along an escape route without requiring external intervention or complex mechanical escape devices.
Data Source
AI summary
A winder is provided near a quarter window of a rear door. A shade member is drawably mounted about the winder. A connecting piece is connected to a drawing arm and mounted to the rear portion of the shade member. A shoe is mounted to a bottom end of the drawing arm. The shoe engages with a regulatory groove extending in a drawing direction of the shade member. A driving cable is connected to the shoe. The shade member can be drawn out across the window by the drawing arm via the sending out of the driving cable by an operating mechanism. Since the regulatory groove extends substantially in a circle, when the shoe moves through engagement with the regulatory groove, the connecting piece connected to the drawing arm pivots relative to the shoe.