Vehicle Roller Blind Shaft Loop Mounting for Balanced Rotation
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Solution Overview
Problem
The existing roller blind devices for vehicle interiors face complexities in mounting and balancing issues due to the configuration of the T-shaped front edge and recess in the roller blind shaft, leading to imbalances during rotation.
Innovation Solution
The end region of the textile sheet material forms an annularly closed loop around the roller blind shaft, with a diameter larger than the shaft, allowing for simplified mounting and the use of radial offset steps and adhesive strips to ensure secure retention and balanced rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a T-shaped folded front edge is used to attach the textile sheet material to the roller blind shaft, then the textile sheet material can be retained in the recess and hollow space, but the mounting process becomes relatively complicated
Solution Approach 1:
The attachment system is divided into separate functional elements: the recess in the roller blind shaft provides mechanical retention, while the adhesive strip provides additional bonding. This segmentation allows each element to perform its specific function optimally without requiring complex integrated structures like the T-shaped fold.
Solution Approach 2:
The complex T-shaped folded front edge configuration is extracted and replaced with a simpler flat end region of the textile sheet material. The retention function is achieved through the recess and adhesive strip combination, eliminating the need for pre-configured folded edges and simplifying the mounting process.
2Reliability
If the roller blind shaft has a recess with an arched hollow space for holding the textile sheet material, then the textile sheet material can be retained, but imbalances during rotation occur
Solution Approach 1:
The arched hollow space configuration that caused rotational imbalance is extracted and replaced with a simple recess that extends along the roller blind shaft. This recess provides adequate retention for the textile sheet material without creating mass distribution issues that lead to imbalance during rotation.
Solution Approach 2:
The recess is designed with uniform cross-section and consistent depth along the roller blind shaft, creating homogeneous mass distribution. This local uniformity ensures that the roller blind shaft maintains rotational balance while still providing effective retention for the textile sheet material through the adhesive strip.
3Reliability
If the end region of the textile sheet material is fixed tightly to the roller blind shaft, then secure retention is achieved, but mounting becomes more difficult
Solution Approach 1:
The adhesive strip is pre-applied to the outer casing of the roller blind shaft before the textile sheet material is mounted. This preliminary preparation allows the textile sheet material to be simply placed and wrapped around the shaft, with the adhesive automatically providing secure retention without requiring complex fastening operations during mounting.
Solution Approach 2:
The adhesive strip acts as an intermediary between the roller blind shaft and the textile sheet material. It provides the bonding function that secures the textile sheet material to the shaft, eliminating the need for mechanical fasteners or complex attachment mechanisms and thereby simplifying the mounting process.
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 configuration simplifies the mounting process, prevents imbalances during rotation, and ensures secure retention of the textile sheet material on the roller blind shaft, enhancing the operational efficiency and quality of the roller blind device.
Implementation Method 1
an adhesive strip, which is arranged opposite to the fixing seam in such a way that when the textile sheet material is loaded in tension, substantially radial compressive forces—relative to an axis of rotation of the roller blind shaft—act through the loop of the textile sheet material on the adhesive strip
Data Source
AI summary
A roller blind device for a vehicle interior including a roller blind shaft and a flexible textile sheet material, an end region of which is secured to the roller blind shaft in order to be wound and unwound relative to the roller blind shaft. The end region of the textile sheet material surrounds an outer casing of the roller blind shaft in the form of a loop which is annularly closed.