Vehicle Roller Blind Winding Device with Radially Braced Helical Spring
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Solution Overview
Problem
Existing roller blind winding devices for vehicles lack mechanical stability and are prone to noise issues, especially at high speeds, due to loose or displaceable bar elements within the helical spring, which leads to rattling and increased costs for assembly and maintenance.
Innovation Solution
A winding device with a rod element that is radially tensioned and guides the helical spring, featuring a spiral or wave shape with multiple contact points, ensuring mechanical stability and noise reduction by maintaining a fixed position within the spring, thus eliminating the need for additional connections and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a bar element is arranged loosely or displaceably within the cavity of the helical spring, then the device complexity is reduced and ease of manufacture is improved, but mechanical stability deteriorates and noise increases at high speeds
Solution Approach 1:
The rod element is designed with a predetermined spiral or wave shape that automatically engages with the helical spring upon insertion. This preliminary configuration ensures that the rod element immediately provides radial bracing and guides the spring in all operating states without requiring additional assembly steps or adjustments, thereby achieving mechanical stability while maintaining simple structure.
Solution Approach 2:
The rod element is embodied in a helical and/or spiral shape or in the form of a wave, which allows it to radially brace the helical spring through its curved geometry. The curved shape enables the rod element to maintain contact points distributed over its length, providing continuous radial support and guiding the spring while eliminating the need for complex connection mechanisms.
2Ease of manufacture
If a bar element is arranged loosely or displaceably within the cavity of the helical spring, then assembly costs are reduced, but noise development increases at high vehicle speeds
Solution Approach 1:
The rod element is pre-shaped in a spiral or wave configuration that automatically engages with the helical spring during assembly. This preliminary action ensures that the rod element immediately braces the spring radially, preventing loose movements and rattling at high speeds while maintaining simple assembly without additional connections or fasteners.
Solution Approach 2:
The helical or spiral shape of the rod element creates multiple contact points with the helical spring, ensuring continuous radial bracing. This curved geometry transforms the rod element from a passive support into an active noise-reducing component that eliminates rattling while keeping the assembly process simple and cost-effective.
3Stability of the object's composition
If additional connections are made between the rod element and the winding element or vehicle, then mechanical stability is improved, but device complexity and assembly costs increase
Solution Approach 1:
The rod element is designed to perform multiple functions simultaneously through its own geometry: it guides the helical spring, braces it radially, and maintains stability in all operating states without requiring external connections. The spiral or wave shape enables the rod element to self-secure within the spring cavity, eliminating the need for additional fasteners or connection mechanisms.
Solution Approach 2:
The rod element is designed as a multi-functional component that combines guiding, bracing, and stabilizing functions in a single element. Its helical or spiral shape allows it to interact with the helical spring at multiple points, providing comprehensive mechanical support without requiring separate connection components, thereby reducing device complexity while maintaining stability.
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
The solution provides a mechanically stable and quiet operation of the roller blind system, reducing noise and assembly costs by ensuring the rod element securely braces the helical spring in all operating states, including high speeds, and simplifies the installation process.
Implementation Method 1
a rod element (52) arranged in the cavity (42) of the coil spring (40) for guiding the coil spring (40), the rod element (52) being designed in such a way that the rod element (52) radially tensions the coil spring (40)
Implementation Method 2
a coil spring (40) having an axially extending cavity (42), the coil spring (40) being coupled to the vehicle and the coil spring (40) enabling rotational movement of the coil element relative to the vehicle
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a winding device (30) for a roller blind arrangement (20), in particular for a vehicle (10), which winding device has a winding element (32) with a longitudinal axis (L). The winding element (32) is designed to be mounted on a vehicle (10) so as to be rotatable about the longitudinal axis (L) and to wind up and unwind a roller blind web (22). The winding device (30) furthermore has a helical spring (40) with an axially extending cavity (42), wherein the winding element (32) is coupled to the vehicle (10) by means of the helical spring (40), and the helical spring (40) permits a rotational movement of the winding element (32) relative to the vehicle (10). In addition, the winding device (30) has a rod element (52), which is arranged in the cavity (42) of the helical spring (40), for guiding the helical spring (40), wherein the rod element (52) is designed in such a manner that the rod element (52) braces the helical spring (40) radially. The invention furthermore relates to a roller blind arrangement (20) with a winding device (30), and to a roof arrangement for a vehicle (10).