Multifunctional Dual Roll Blind With Segmented Light Control
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Solution Overview
Problem
Existing double roll blinds with roll screens cannot independently adjust the upper and lower portions to allow partial opening of the upper portion while maintaining light blocking in the lower portion, limiting user flexibility in controlling light and visibility.
Innovation Solution
A multifunctional double roll blind design with a roll screen divided into upper and lower portions, featuring adjustable units with alternating translucent mesh and light-blocking parts, allowing for independent control of light transmission and blocking through a winding mechanism that includes a twist preventing member, enabling the upper portion to be partially opened while maintaining light blocking in the lower portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the screen is almost deployed and the upper portion implements sight or transmission of light by user's manipulation, then the lower portion cannot block the light, but the user demands both upper portion opening and lower portion light blocking simultaneously
Solution Approach 1:
The roll screen is divided into three distinct adjustment units: a first adjustment unit at the upper portion, a second adjustment unit at the lower portion, and a third adjustment unit at the middle portion. Each unit can be independently adjusted to control light blocking and visibility in different regions of the window, allowing the upper portion to be opened while the lower portion maintains light blocking.
Solution Approach 2:
The blind system transitions from a static whole-screen control to a dynamic multi-region control system. The three adjustment units can be independently positioned at different heights, allowing dynamic configuration of light blocking patterns. The winding rod mechanism enables continuous adjustment of each unit's position, providing flexible and adaptive light control.
2Adaptability or versatility
If the double roll blind adjusts light-blocking degree by overlapping front and rear fabric, then the entire screen must be adjusted together, but independent upper and lower portion control is needed
Solution Approach 1:
The fabric is segmented into three adjustment units with different functional zones. The first adjustment unit contains translucent mesh parts for upper portion visibility, the second adjustment unit contains light-blocking parts for lower portion privacy, and the third adjustment unit provides intermediate control. This segmentation allows regional light control while maintaining a relatively simple overall structure.
Solution Approach 2:
Different portions of the roll screen are assigned different optical properties: the upper portion uses translucent mesh material for visibility, the lower portion uses light-blocking material for privacy, and the middle portion provides transitional control. Each local region has optimized material properties suited to its specific function.
Data Source
AI summary
A multifunctional double roll blind includes a roll screen, a housing, a winding rod and a twist preventing member in which the roll screen includes first and third adjustment units and a second adjustment unit formed between the first adjustment unit and the third adjustment unit, the first adjustment unit includes first translucent mesh parts and first blocking parts arranged in an alternating pattern, the third adjustment unit includes third translucent mesh parts and third blocking parts arranged in an alternating pattern, the second adjustment unit includes second translucent mesh parts and second blocking parts arranged in an alternating pattern, and the roll screen is configured to be in one of (i) a fully opening mode, (ii) a fully closed mode and (iii) an opening mode at an upper section and an closed mode at a lower section according to rotation of the winding rod.