Combination Roller Blind Fine Adjustment for Complete Shading
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Solution Overview
Problem
Existing combination roller blinds face issues with overlapping light-transmissive sections when installed on window frames, leading to incomplete light blocking and limited compatibility with varying frame lengths, requiring cumbersome manual adjustments and cutting of blind sheets.
Innovation Solution
A combination roller blind with a fine adjustment mechanism behind the headrail allows for precise control of the blind sheet ends, enabling non-overlapping light-transmissive sections and complete shading, compatible with various frame lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the blind sheet is fixed to the headrail without fine adjustment capability, then the structure is simple and easy to manufacture, but the light-transmissive sections overlap when installed on window frames, resulting in incomplete light blocking
Solution Approach 1:
The patent applies the dynamics principle by making the blind sheet adjustment capability variable rather than fixed. The fine adjustment mechanism allows the blind sheet to be dynamically adjusted to different positions, enabling the light-transmissive sections to align properly and block light completely, while maintaining structural simplicity when fine adjustment is not needed.
Solution Approach 2:
The patent segments the adjustment function into two parts: a main adjustment mechanism for gross positioning and a fine adjustment mechanism for precise alignment. This segmentation allows the system to achieve complete light blocking through the fine adjustment of the blind sheet position, while keeping the overall structure relatively simple by separating the adjustment functions.
2Adaptability or versatility
If the blind sheet is cut to a fixed length for specific window frame sizes, then the light blocking is complete for that specific size, but the adaptability to various window frame lengths is limited
Solution Approach 1:
The patent applies universality by designing the blind sheet with a fine adjustment mechanism that allows a single standardized blind sheet to fit multiple window frame lengths. The fine adjustment capability enables the blind sheet to be precisely positioned regardless of the window frame size, making one blind sheet design universal for various applications without requiring custom cutting for each size.
Solution Approach 2:
The dynamic adjustment capability allows the blind sheet to adapt to different window frame lengths without requiring different fixed-length blind sheets. The fine adjustment mechanism provides the flexibility needed to accommodate varying frame sizes while maintaining ease of manufacture through standardized production.
3Reliability
If manual cutting and adjustment of the blind sheet is performed to achieve proper alignment, then the light blocking is complete, but the adjustment process is cumbersome and time-consuming
Solution Approach 1:
The patent replaces static manual cutting with a dynamic fine adjustment mechanism that allows the blind sheet to be precisely positioned after installation. This eliminates the need for cumbersome cutting operations and enables simple, tool-free adjustment to achieve complete light blocking, significantly improving ease of operation.
Solution Approach 2:
The fine adjustment mechanism is designed to be user-operable without requiring specialized tools or skills. The user can independently adjust the blind sheet position to achieve proper alignment and complete light blocking, making the system self-servicing and eliminating the need for professional installation assistance.
Data Source
AI summary
The present invention relates to a combination roller blind wherein a fine adjustment means is provided behind an upper face of a headrail, the adjustment means causing an end of a blind sheet wrapped around a blind roll and an end opposite thereof to be fine-adjustably wrapped and unwrapped. When the blind is installed on a ceiling or a window frame to completely conceal the bottom edge of the window so that a bottom edge of a weight is adjoining a bottom sill of the window frame, and a portion of a light-transmissive section of the blind sheet is not overlapped, the opposite edge wrapped around the blind roll of the blind sheet can be fine-adjusted by rolling so that the light-transmissive section alternates with and is not completely overlapped by a light blocking section, allowing for complete shading to be achieved while completely concealing the bottom edge of the window.