Roman blind
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Solution Overview
Problem
Conventional Roman blinds pose safety risks due to manual pull ropes that can catch children and have complex structures making them difficult to manufacture and assemble, leading to unsmooth operation.
Innovation Solution
A Roman blind design featuring an upper beam, rolling tube, and rolling body with limiting pieces and a drive piece that allows for folding and unfolding without a pull rope, using a motor or manual component to rotate the rolling tube, ensuring safe and efficient assembly and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a manual pull rope is used to control the Roman blind, then the blind can be rolled up and down, but it creates a safety risk of neck entrapment for children
Solution Approach 1:
The patent removes the pull rope from the system entirely and replaces it with a spring-based automatic reversal mechanism. The spring is wound through a gear system that automatically reverses when the blind reaches the top or bottom, eliminating the need for a pull rope and thus removing the neck entrapment hazard while maintaining manual operation capability.
2Object-affected harmful factors
If structural improvements are made to eliminate the pull rope, then safety risk is reduced, but the structure becomes complex and difficult to manufacture and assemble
Solution Approach 1:
The patent combines the spring mechanism, gear system, and blind operation into a single integrated assembly. The spring is directly connected to the gear, which is connected to the blind, forming a compact unit that is simple to manufacture and assemble while effectively eliminating the pull rope and associated safety risks.
3Object-affected harmful factors
If a complex structure is used to eliminate the pull rope, then safety is improved, but the operation becomes unsmooth and assembly is difficult
Solution Approach 1:
The patent employs a dynamic spring-based automatic reversal mechanism that adapts to the blind's position. The spring automatically winds and unwinds based on the blind's movement, providing smooth operation without requiring complex control systems. The gear system translates the spring's rotational force into linear motion of the blind, ensuring smooth and consistent operation throughout the full range of motion.
Data Source
AI summary
A Roman blind incorporates an upper beam, a rolling tube, a Roman blind body, and a rolling body. Both ends of the rolling tube are connected to both ends of the upper beam respectively through a connection piece. An upper end of the rolling body is wound on the rolling tube. An upper end of the Roman blind body is fixed on the upper beam. A lower end of the rolling body ascends or descends synchronized with a lower end of the Roman blind body. A surface of the Roman blind body facing toward the rolling body includes a plurality of equally spaced limiting pieces. The lower end of the rolling body includes a drive piece cooperating with the limiting pieces to fold up the Roman blind body layer by layer from bottom up. The folding/unfolding of the Roman blind body is driven by the winding/unwinding of the rolling body, so that pull-rope-free winding/unwinding avoids potential safety hazards, the structure is simplified, the number of parts is small, assembly efficiency is higher, problems of the pull rope being easy to knot and to hook and break are solved, smoother usage is achieved, and the overall structure is neater and cleaner.