Window Covering Stability via Spring-Shaft and Rail Mount
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Solution Overview
Problem
Window coverings face challenges with high costs due to spring motor units and difficulties in installation and stability, often resulting from improper mounting.
Innovation Solution
A window covering design featuring a shaft with spring motor pulleys and a rail system for easy height adjustment and installation, including a mechanism for stable positioning without exposed operator cords, using resilient fingers and locator holes for secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring motor unit with substantial transmission system or specially constructed spring member is used, then the window covering can support variable load during raising or lowering, but the cost of the spring motor unit increases substantially
Solution Approach 1:
The patent removes the traditional spring motor unit entirely and replaces it with a spring element directly connected to the shaft. This extraction of the complex motor assembly eliminates the need for substantial transmission systems and specially constructed spring members, thereby reducing manufacturing cost while maintaining the essential function of supporting variable loads through the simplified spring-shaft direct connection.
Solution Approach 2:
The patent replaces the mechanical spring motor unit with a simpler spring element that directly engages with the shaft. This substitution eliminates complex mechanical transmission components and replaces them with a straightforward spring-mass-spring system that achieves the same load support function at lower cost through reduced mechanical complexity.
2Reliability
If traditional mounting brackets are used, then the window covering can be mounted adjacent a window, but users have difficulty installing and achieving proper stability
Solution Approach 1:
The patent incorporates preliminary alignment features directly into the mounting brackets, including alignment pins and pre-configured mounting holes that guide proper positioning before final installation. This preliminary action built into the bracket design eliminates the need for complex alignment procedures during installation, allowing users to achieve proper stability through simple snap-fit or slide-in actions rather than precision mounting.
3Adaptability or versatility
If height adjustment mechanism is added to window covering, then effective height adjustment of window covering material is enabled, but the device complexity increases
Solution Approach 1:
The patent implements height adjustment through a dynamic spring-tension system where the spring element's tension and coil configuration can be adjusted to change the effective height of the window covering. This dynamic adjustment mechanism allows users to modify height by simply adjusting spring tension or adding/removing spring coils, providing adaptability without requiring complex mechanical position control systems.
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 design allows for easy and stable installation of window coverings, providing effective height adjustment and maintaining user-selected positions without the need for exposed cords, enhancing user satisfaction and operational efficiency.
Implementation Method 1
a spring extending from the first spring motor pulley to the second spring motor pulley. The first end of the shaft can be connected to the first spring motor pulley or the second spring motor pulley such that the shaft is rotatable in the first rotational direction and is also rotatable in the second rotational direction and such that the spring biases the shaft to rotate in the second rotational direction for retracting the window covering material
Data Source
AI summary
A window covering includes a first bracket spaced apart from a second bracket, a shaft positioned between the brackets, and window covering material connected to the shaft. The window covering can also include a window covering material position control mechanism to facilitate positional control for the window covering material. In some embodiments, a rail extends between the first and second brackets above the shaft. Each bracket can include at least one finger that is positionable within a locator hole in an end of the rail so that opposite ends of the rail are connectable to the brackets via the fingers and locator holes. The rail can have a length that is configured so that when the rail is coupled to the first and second brackets via the fingers and locator holes and the brackets can be accurately spaced apart from each other for installation of the window covering.