Direct-Driven Roller Blind Wire Guidance for Noise-Free Pulley Entry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Direct driven roller blind assemblies in vehicles face issues with the large angle between the tensioning wire and the wire pulley, leading to noise and potential wire dislodgment, which is not effectively addressed by existing configurations.
Innovation Solution
A set of guidance members is introduced to guide the tensioning wire from the wire pulley to the operating beam, controlling the angle between the tensioning wire and the wire pulley within a specified range, using two guidance members positioned differently to maintain the tensioning wire's parallel alignment with the guide rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the wire pulley and drive motor are packaged next to the winding tube, then the roller blind assembly can be compact, but the assembly becomes wider than conventional roller blind assemblies
Solution Approach 1:
The patent repositions components from a side-by-side arrangement to a stacked arrangement along the longitudinal axis of the vehicle. The wire pulley is mounted on the outer end of the winding tube, and the drive motor is positioned in the longitudinal direction rather than transversal, effectively moving the layout to another dimension to resolve the space conflict.
2Ease of operation
If the roller blind assembly and other roof components are packaged next to each other in a combined space, then the daylight opening can be maintained, but a large step is created in the longitudinal direction between the tensioning wire and wire pulley
Solution Approach 1:
The patent introduces guidance members as intermediary elements between the wire pulley and the tensioning wire. These guidance members guide the tensioning wire at controlled angles, preventing the wire from dislodging from the pulley while accommodating the spatial constraints imposed by the component packaging arrangement.
3Shape
If a large distance is provided in the longitudinal direction to mitigate the angle between tensioning wire and wire pulley, then the angle can be controlled, but the vehicle dimensions are exceeded
Solution Approach 1:
The patent divides the guidance function into multiple segments by using multiple guidance members positioned at different locations. This segmentation allows the tensioning wire to be guided through a series of smaller angular changes rather than requiring a single large distance, thereby controlling the angle within compact longitudinal dimensions.
4Volume of moving object
If the tensioning wire runs at a large angle to the wire pulley, then the assembly can be compact, but the wire may rattle or fall off the pulley groove
Solution Approach 1:
The patent implements preliminary guidance of the tensioning wire through guidance members before it engages with the wire pulley. This preliminary action ensures the wire approaches the pulley at the correct angle and position, preventing rattling or dislodgment during operation while maintaining compact assembly dimensions.
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 effectively reduces the angle between the tensioning wire and the wire pulley, preventing rattling and dislodgment, while maintaining a secure and efficient operation of the roller blind assembly without increasing the assembly's transverse space requirements.
Implementation Method 1
a set of guidance members for guiding the tensioning wire with a controlled angle from and onto a wire pulley
Data Source
AI summary
A roller blind assembly and a roller blind assembly comprises a set of guidance members for guiding a tensioning wire with a controlled angle from and onto a wire pulley A roof assembly comprises such a roller blind assembly, while a vehicle comprises said roof assembly.