Cordless Retractable Roller Shade With Spring-Loaded Reel
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Solution Overview
Problem
Retractable shades with operating cords are prone to tangling, wear, and pose safety risks, making them difficult to use and potentially hazardous.
Innovation Solution
A cordless retractable shade system with a counterbalancing force mechanism, utilizing a biasing element like a coil or clock spring, that supports the shade at any desired extension level, combined with a vane orientation mechanism to adjust vane positions, eliminating the need for cords and ensuring smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If operating cords are used to control retractable shades, then the shade can be raised and lowered, but the cords may become tangled, fray, break, and pose safety risks
Solution Approach 1:
The patent removes the operating cords entirely from the system and replaces them with a cordless operating mechanism. The bottom rail is directly connected to the roller through a reel mechanism, eliminating the intermediate cords that cause tangling, fraying, and safety hazards while maintaining the ability to raise and lower the shade.
Solution Approach 2:
The reel mechanism is designed to automatically wind the shade material onto the roller when the bottom rail is pulled downward, and automatically unreel when pushed upward. This self-service mechanism eliminates the need for manual cord manipulation while maintaining reliable operation.
2Adaptability or versatility
If cords are used to operate the shade, then the shade can be positioned at different levels, but the cords present safety risks and may damage the covering
Solution Approach 1:
The patent eliminates the harmful cords from the system while preserving the positioning capability through a direct mechanical connection between the bottom rail and roller. The cordless design removes safety hazards such as tangling, fraying, and pinching risks associated with traditional cord-operated shades.
3Object-affected harmful factors
If a cordless operating system is used, then safety risks are eliminated, but a counterbalancing mechanism is needed to support the shade at any level
Solution Approach 1:
The patent incorporates a spring-loaded reel mechanism that provides counterbalancing force to support the weight of the shade material. The spring is configured to exert an upward force that balances the downward weight of the extended shade, allowing the bottom rail to be positioned and held at any intermediate level without cords or additional complex mechanisms.
4Ease of operation
If the bottom rail is manually moved to operate the shade, then cords are eliminated, but the operating system must apply counterbalancing force
Solution Approach 1:
The spring-loaded reel mechanism generates counterbalancing force that opposes the weight of the shade material. When the user pulls the bottom rail downward, the spring winds up and stores energy; when the rail is released, the spring unwinds and provides upward force to support the shade, reducing the effort needed to operate the system.
Solution Approach 2:
The operating system transitions from a static cord-based mechanism to a dynamic spring-loaded reel that automatically adjusts the counterbalancing force based on the position and weight of the extended shade. The spring force varies dynamically as the reel winds and unwinds, providing optimal support at all positions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a safe, easy-to-use shade that can be positioned at any point between fully retracted and fully extended, with adjustable light control through tiltable vanes, reducing the risk of tangling and damage while maintaining the shade's position without cords.
Implementation Method 1
A cordless retractable shade system with a counterbalancing force mechanism, utilizing a biasing element like a coil or clock spring
Data Source
AI summary
A cordless retractable shade including an operating system for the shade that varies a biasing force of a spring to counterbalance the shade. The bottom rail of a retractable shade can be raised or lowered, and due to the operating system remains in any selected position of the covering between fully extended and fully retracted, without the use of operating cords. The system includes a method of negating and reversing the spring bias effect at a strategic position whereby the flexible vanes of the shade can be adjusted between open and closed.