Winding Device for Window Coverings with Wave-Like Deflector
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Solution Overview
Problem
Existing winding devices for covering wall openings or windows face issues such as fabric damage due to tension and increased speed caused by the growing diameter of the winding shaft, requiring additional fixing elements to compensate for diameter differences, and necessitate higher winding forces, which can be unsafe and inefficient.
Innovation Solution
A winding device with a wave-like deflecting element and a raising and lowering unit using cords that guide the covering element, allowing it to be wound up or unwound without additional fixing elements, distributing the winding force evenly and reducing the risk of fabric damage, while maintaining a constant unwinding speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the shaft diameter increases during the winding process, then the fabric is wound onto the shaft, but the fabric speed increases and the fabric can be damaged
Solution Approach 1:
The shaft is designed to be movable in the vertical direction, allowing it to rise as fabric is wound onto it. This dynamic adjustment compensates for the increasing diameter, maintaining constant fabric speed and preventing damage during the winding process
2Force
If the fabric carries the weight of the shaft during winding, then the shaft can be moved upwards, but tension on the fabric increases and can damage the fabric
Solution Approach 1:
A counterweight mechanism is provided that balances the weight of the shaft, reducing the tension on the fabric during the winding process and preventing fabric damage while allowing the shaft to be moved upwards
3Reliability
If additional fixing elements are used to compensate for diameter differences, then the winding process can be controlled, but the device complexity increases
Solution Approach 1:
The shaft's vertical movement capability is combined with the winding mechanism, eliminating the need for separate fixing elements to compensate for diameter changes. The shaft itself performs the compensation function through its ability to rise as fabric is wound onto it
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 device allows for easy and safe operation with reduced force requirements, preventing fabric damage and maintaining consistent speed, enabling efficient covering and uncovering of large areas without additional drive units or complex installations.
Implementation Method 1
The cord is arranged in such a way that it encloses the covering element, whereby the deflecting element or the bottom longitudinal edge is guided in the bend of the cord
Data Source
AI summary
The invention relates to a winding device and to a method for covering wall openings or windows. The winding device comprises a covering element that can be rolled up, a deflecting element that has a wave-like design, or is simply formed by a bottom hemline, or a bottom woven fabric edge and/or longitudinal edge, and at least on raising and lowering unit. In addition, the covering element is provided with an upper longitudinal edge, which is preferably arranged in parallel to the deflecting element. The lower longitudinal edge is either connected to the deflecting element, or is formed by the same, so that as a result of a rotation of the deflecting element, or of the lower woven fabric edge and/or longitudinal edge, about a horizontal axis, the covering element can be rolled up or down. The raising and lowering unit comprises at least one cord, wherein at least one free end of the cord is connected to the raising and lowering unit. The cord is arranged such that it encloses the covering element, so that the deflecting element, or the lower longitudinal edge, is guided in the bend of the cord. The at least one cord can be guided in two opposite directions of movement that are relative to one another.