Roman Shade Roller Winding With Cord-Driven Sequential Folding
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Solution Overview
Problem
Existing roller winding roman style shades have complex structures and high production costs due to numerous limit devices, increasing weight and environmental impact.
Innovation Solution
A roller winding roman style shade design that uses at least one cord, tape, or band to connect the front-side blind material to the rear-side roller shade, allowing sequential pulling up of the blind material for a simple structure and low fabrication cost, with actuating members like cords or fabric strips to facilitate folding and unfolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple limit devices are used to control the roller shade winding, then the positioning accuracy is improved, but the device complexity and production cost increase significantly
Solution Approach 1:
The patent extracts and eliminates the complex limit devices (limit rods, double-snap rings, auxiliary rods) from the system. Instead, it uses a simple cord that passes through the fabric screen to connect the roller shade to the weight, achieving positioning through the natural tension and gravity of the weight without requiring multiple limiting components.
Solution Approach 2:
The weight serves itself by automatically positioning the roller shade at the desired height through its own gravity. The cord transmits the weight's gravitational force to control the winding and unwinding of the roller shade, eliminating the need for external limit devices to maintain position.
2Reliability
If multiple limit devices and auxiliary rods are installed, then the positioning function is improved, but the overall weight of the roman style shade increases
Solution Approach 1:
The patent removes all auxiliary rods, limit rods, and double-snap rings that contribute to the overall weight. The positioning function is achieved solely through the cord-weight system, where the weight's gravity provides the necessary control force without adding structural mass.
Solution Approach 2:
The fabric screen itself is utilized as the connection medium instead of rigid auxiliary rods. The cord passes through the fabric screen, which acts as a flexible connector, eliminating the need for rigid positioning components that would increase weight.
3Ease of operation
If more elements and components are adopted for control, then the ease of operation is improved, but the environmental friendliness deteriorates due to increased material consumption
Solution Approach 1:
The patent extracts and eliminates unnecessary components (limit devices, auxiliary rods, multiple snap rings) that consume materials. The operation is simplified to using only the cord and weight system, reducing material consumption while maintaining ease of operation through the intuitive pull-down mechanism.
Solution Approach 2:
The cord serves multiple functions: it connects the roller shade to the weight, transmits the control force for winding and unwinding, and provides the positioning mechanism through the weight's gravity. This multi-functionality eliminates the need for separate components, reducing overall material consumption.
Data Source
AI summary
A roller-shade winding roman style shade is provided. A technical feature thereof is to utilize an actuating member of a cord or a band-shaped long strip of fabric to connect a blind material and a roller shade. Thus, as the roller shade rises, the parts where the blind material and the actuating member are connected are pulled up sequentially from the bottom up, and when reaching the top end, the points where the blind material and the actuating member are connected are kept at approximately the same height, such that the roman style shade is in a retracted and folded state. The blind material of the whole roman style shade can be folded up or dropped down merely through connection of the actuating member between the blind material and the roller shade, the roller shade has diversified applications and is more flexible in use and pleasant to look at.