Detachable Cord Rolling Device for Window Blinds
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Solution Overview
Problem
Existing non-pull cord window blind systems face challenges in providing sufficient rolling force for large-sized window blinds, leading to increased costs and structural complexity when multiple cord rolling devices are required.
Innovation Solution
A detachable cord rolling device comprising a cord rolling unit with torsion spring gears and an auxiliary driving unit connected by a transmission shaft, which allows for synchronized rotation and enhanced rolling force without the need for additional units, thereby simplifying the structure and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If multiple cord rolling devices are used to provide sufficient rolling force for large-sized window blinds, then the rolling force is improved, but the device complexity and cost increase
Solution Approach 1:
The patent combines multiple cord rolling devices into a single integrated unit with multiple torsion springs working together. The first and second torsion springs are connected through gears to provide combined rolling force, eliminating the need for separate devices while maintaining sufficient force for large window blinds.
Solution Approach 2:
The cord rolling device is designed to handle both normal-sized and large-sized window blinds through its multi-spring mechanism. The same device structure provides adequate rolling force for various window sizes, making it universally applicable without requiring additional components for large windows.
2Force
If multiple cord rolling devices are used to provide sufficient rolling force for large-sized window blinds, then the rolling force is improved, but the cost increases
Solution Approach 1:
By merging multiple torsion springs into a single integrated cord rolling device, the patent reduces the total number of components that need to be manufactured and assembled. This consolidation lowers production costs while maintaining the necessary rolling force for large window blinds.
3Device complexity
If a single cord rolling device is used for large-sized window blinds, then the structure is simplified, but the rolling force becomes insufficient
Solution Approach 1:
The patent changes the internal parameters of the cord rolling device by incorporating multiple torsion springs with different stiffness characteristics. This allows the single device to generate sufficient rolling force for large window blinds while maintaining structural simplicity, as the enhanced force comes from within the same component rather than adding separate devices.
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 detachable cord rolling device provides sufficient rolling force for large-sized window blinds, reducing the need for multiple units and lowering costs while maintaining a simplified structure, enabling convenient operation.
Implementation Method 1
The first torsion spring connects the first and second torsion spring gears. The second torsion spring connects the third and fourth torsion spring gears.
Implementation Method 2
The first and second torsion spring gears are rotatably disposed on the first base and engaged with each other. The cord rolling gear is rotatably disposed on the first base and engaged with one of the first and second torsion spring gears.
Implementation Method 3
The transmission shaft detachably connects the first torsion spring gear of the cord rolling unit and the third torsion spring gear of the auxiliary driving unit, thereby enabling the first and third torsion spring gears to rotate synchronously.
Data Source
AI summary
A detachable cord rolling device includes a cord rolling unit and an auxiliary driving unit. The cord rolling unit has a first base where first and second torsion spring gears engaged with each other are disposed. A first torsion spring is disposed between the first and second torsion spring gears. The auxiliary driving unit has a second base where third and fourth torsion spring gears engaged with each other are disposed. The second base is detachably disposed on the first base of the cord rolling unit. The third torsion spring gear and the first torsion spring gear of the cord rolling unit are connected by a transmission shaft, thereby rotatable synchronously. As a result, the cord rolling unit of the invention can be used individually, or combined with the auxiliary driving unit by the transmission shaft for increasing the rolling force of the cord rolling unit.