Modular Spring Drive System for Cordless Window Shades
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Solution Overview
Problem
Conventional spring drive systems for window shades are complex and not easily adaptable to different sizes or types of window shades, posing challenges in safety and functionality, particularly with regards to cordless operation to mitigate strangulation risks.
Innovation Solution
A spring drive system comprising a housing, cord drum, gears, and springs that unwind and wind around take-up reels to rotate the cord drum, allowing for cordless operation and adjustable height settings, with multiple assemblies for larger window shades, facilitating easy adaptation and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional spring drive systems are used in window shades, then the bottom rail can be raised and lowered, but the construction becomes complex and difficult to adapt to different sizes or types of window shades
Solution Approach 1:
The spring drive system is divided into multiple independent modules, each comprising a spring reel, gear, and associated components. These modular units can be independently assembled and configured to match different window shade sizes and types, simplifying the overall construction while maintaining functionality.
Solution Approach 2:
The spring drive system is designed with universal components that can be adapted to various window shade configurations. The modular design allows the same basic components to serve different functions and accommodate different sizes, making the system versatile and easy to adapt without requiring completely different constructions for each application.
2Adaptability or versatility
If conventional spring drive systems are used in window shades, then the bottom rail can be raised and lowered, but the system is not easily adaptable to different sizes or types of window shades
Solution Approach 1:
The spring drive system is divided into multiple independent parts that can be selectively combined. Each module can be independently sized and configured, allowing the system to be easily adapted to different window shade dimensions and types without increasing overall construction complexity.
Solution Approach 2:
The system incorporates adjustable and reconfigurable components that can be dynamically adapted to different applications. The modular design allows for flexible configuration changes based on the specific window shade size and type requirements.
3Ease of operation
If an operating cord is used in window shades, then the bottom rail can be manually raised and lowered, but it poses strangulation risks to children
Solution Approach 1:
The dangerous operating cord is completely removed from the system. Instead, a cordless spring-driven mechanism is implemented where the spring reels and gears automatically raise and lower the bottom rail without requiring any external cords or ropes that could pose strangulation risks.
Solution Approach 2:
The spring drive system is self-contained and self-operating. The springs store mechanical energy and automatically drive the gear mechanism to raise and lower the bottom rail without requiring manual cord operation, eliminating the need for exposed cords while maintaining ease of operation.
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, adaptable, and efficient cordless operation for window shades, addressing the complexity and size issues of conventional systems while ensuring easy installation and operation, enhancing safety by eliminating exposed cords.
Implementation Method 1
a first spring disposed around the first spring reel and having an end anchored with the first take-up reel, and a second spring disposed around the second spring reel and having an end anchored the second take-up reel. The first and second springs can respectively unwind from the first and second spring reels and respectively wind around the first and second take-up reels when the cord drum rotates for unwinding the first and second suspension cords, and the first and second springs can respectively unwind from the first and second take-up reels and respectively wind around the first and second spring reels to urge the cord drum in rotation for winding the first and second suspension cords.
Data Source
AI summary
A spring drive system for a window shade includes a housing, a cord drum and a first gear fixedly connected with each other and pivotally connected with the housing, the cord drum being connected with two second suspension cords, a second gear pivotally connected with the housing, two spring reels respectively pivotally connected at two opposite sides of the second gear so that the two spring reels are respectively rotatable relative to the second gear, the second gear and the two spring reels being disposed in a coaxial manner, a third gear pivotally connected with the housing and respectively meshed with the first and second gears, the third gear being fixedly connected with two second take-up reel at two opposite sides, and two springs each assembled around one corresponding spring reel and having one end connected with one corresponding take-up reel.