Adjustable Roller Bottom Rail for Zebra Shade Alignment
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Solution Overview
Problem
Zebra-type or banded roller shades often fail to align their alternating shade bands properly when fully extended, leading to gaps between the shade and architectural structures, which can allow light to pass through and are aesthetically displeasing.
Innovation Solution
A bottom rail assembly with an adjustable roller position within a rail housing, allowing for vertical alignment of shade bands by sliding and locking the roller post member, ensuring alignment when the shade is fully extended.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the roller shade is lowered to the bottom of the architectural structure, then the shade covers the maximum area, but the shade bands become misaligned
Solution Approach 1:
The roller post member is made adjustable within the rail housing, allowing it to move vertically between extended and retracted positions. This dynamic adjustment enables the system to adapt the roller position to achieve proper shade band alignment while maintaining full coverage area when the shade is lowered to the bottom of the architectural structure.
2Manufacturing precision
If the shade is raised to align the shade bands, then proper alignment is achieved, but gaps are created at the bottom
Solution Approach 1:
Instead of raising the entire shade to align bands, the roller post member can be adjusted independently within the rail housing to the optimal position. This allows the shade to remain at the bottom for full coverage while the roller position is dynamically adjusted to ensure proper shade band alignment, eliminating gaps.
3Manufacturing precision
If the roller sheet is extended further to align shade bands, then alignment is improved, but the roller sheet becomes slack and bunched
Solution Approach 1:
The adjustable roller post member allows the roller position to be dynamically optimized within the rail housing. By adjusting the roller position rather than extending the roller sheet further, the system achieves shade band alignment while maintaining the roller sheet in a taut state, preventing slack, bunching, or folding.
4Device complexity
If the roller position is fixed, then the structure is simple, but adjustment of shade band alignment is not possible
Solution Approach 1:
The roller post member is designed to be adjustable within the rail housing while maintaining a relatively simple overall structure. The adjustment mechanism allows the roller position to be modified to achieve proper shade band alignment, providing adaptability without significantly increasing structural complexity.
Data Source
AI summary
In one aspect, a covering for an architectural structure may include a shade panel and a bottom rail assembly coupled to the shade panel. The bottom rail assembly may include a rail housing and a roller extending within the rail housing, with the shade panel being looped around the roller such that the bottom rail assembly is vertically supported by the shade panel as the panel is moved between extended and retracted positions. In addition, the relative positioning of the roller within the rail housing may be adjusted, as desired, between the top and bottom ends of the bottom rail housing.