Side-Inserted Cord Rolling Device for Window Blinds
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Solution Overview
Problem
Existing non-pull cord window blinds face installation and operational challenges due to the central location of the cord rolling device, which often interferes with other elements during assembly and usage.
Innovation Solution
A side-inserted cord rolling device featuring a base with a first and second wheel, torsion spring, and lift transmission cords, allowing for easy installation and operation by positioning the device at an end of the top beam and incorporating a resistance adjusting module for customizable resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cord rolling device is located at the middle of the top beam, then the cord rolling function is achieved, but the device interferes with other elements during assembly and usage
Solution Approach 1:
The cord rolling device is extracted from the central position and relocated to the end position of the top beam. This extraction from the problematic central location eliminates interference with other elements while maintaining the cord rolling function, directly resolving the contradiction between ease of operation and device complexity.
Solution Approach 2:
Instead of placing the cord rolling device in the conventional central position, the invention inverts the location strategy by positioning it at the end of the top beam. This inverted approach to location selection solves the interference problem while preserving operational functionality.
2Reliability
If the cord rolling device is located at the middle of the top beam, then the cord rolling function is achieved, but the arrangement of other elements becomes complicated
Solution Approach 1:
By extracting the cord rolling device from the central position and placing it at the end, the invention simplifies the arrangement of other elements. The functional reliability is maintained through the end-positioned first wheel, while the spatial complexity of element arrangement is reduced.
Solution Approach 2:
The invention changes the spatial dimension of the cord rolling device location from the horizontal centerline to the longitudinal end position. This dimensional shift reorganizes the spatial relationships among elements, reducing arrangement complexity while preserving the cord rolling function.
3Ease of manufacture
If the cord rolling device is quickly installed at the end of the top beam, then the installation convenience is improved, but the positioning accuracy may be compromised
Solution Approach 1:
The base incorporates self-positioning features including an end plate that automatically abuts against the end surface of the top beam and guideways that guide the installation process. These self-service mechanisms ensure accurate positioning without requiring complex external positioning tools or procedures, thus maintaining both installation convenience and positioning accuracy.
Solution Approach 2:
The base is pre-equipped with positioning structures such as the end plate and guideways before installation. These preliminary prepared features ensure that when the device is quickly installed, the positioning accuracy is automatically maintained through the pre-designed geometric constraints.
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
Enhances usage convenience by facilitating quick installation and removal, and allows for adjustable resistance without disassembly, improving assembly accuracy and operational ease.
Implementation Method 1
a torsion spring, wherein the torsion spring connects the bottom layer of the first wheel and the second wheel
Data Source
AI summary
A side-inserted cord rolling device for a non-pull cord window blind includes a base, first and second wheels disposed on the base and respectively located near an end plate and an opening provided at two ends of the base, a torsion spring, and two lift transmission cords. The first wheel has top, middle and bottom layers separated by disc portions. The torsion spring connects the bottom layer of the first wheel and the second wheel. An end of the lift transmission cords are connected to the top and middle layers of the first wheel respectively. Another end of the lift transmission cords are inserted through the opening of the base to be located out of the base for being connected with a bottom beam.