Screen assembly
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Solution Overview
Problem
Existing screen assemblies for windows require accurate matching of the roller width to the window opening and often result in light leakage due to gaps, and the mounting process involves drilling holes, which can be damaging and requires skilled fitting to ensure proper leveling.
Innovation Solution
A screen assembly with parallel, extendable side rails that frictionally engage the window opening without drilling, featuring adjustable end caps and a head assembly with a roller that can be mounted on the side rails, allowing for leveling and secure attachment without additional fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mounting brackets are attached to the upper sides of the window opening by screws inserted into holes, then the screen assembly can be securely mounted, but holes must be accurately drilled into the sides of the window opening which requires skilled fitting and can result in damage to the window opening
Solution Approach 1:
The patent removes the mounting brackets entirely from the system. Instead of attaching brackets to the window opening with screws, the side rails directly engage with the window opening through friction and geometry, eliminating the need for holes and screw fasteners that could damage the window.
Solution Approach 2:
The side rails act as intermediaries between the window opening and the head assembly. The side rails frictionally engage the window opening and provide a mounting surface for the head assembly, eliminating the need for direct attachment to the window opening and thus preventing damage.
2Manufacturing precision
If the width of the roller is accurately matched to the width of the window opening, then the screen assembly can be mounted within the window opening, but gaps between the sides of the screen and the sides of the window opening may prevent the screen from completely shutting out light
Solution Approach 1:
The patent transitions from a single-dimension fixed width approach to a two-dimension adjustable approach. The side rails can adjust both their spacing (width dimension) and their position (vertical dimension), allowing the screen to completely fill the window opening and block light effectively while maintaining proper mounting.
Solution Approach 2:
The side rails are made adjustable rather than fixed. The extendable side rails can be lengthened or shortened and repositioned vertically along the window opening, allowing dynamic adaptation to different window dimensions and ensuring complete light blocking without gaps.
3Stability of the object's composition
If mounting brackets are positioned to ensure the roller is level, then the screen moves parallel to the sides of the window opening, but this requires skilled fitting and accurate drilling
Solution Approach 1:
The side rails have self-leveling capability through their adjustable design. The ability to independently adjust the vertical position and spacing of the side rails allows them to automatically accommodate irregularities in the window opening and achieve proper leveling without requiring skilled fitting or precise drilling.
4Adaptability or versatility
If the side rails are made extendable to adjust to various window widths, then the screen assembly can fit different window openings, but the structure becomes more complex
Solution Approach 1:
The side rails are divided into segmented sections that can be extended or reconfigured. This segmentation allows the side rails to adapt to different window widths by adjusting the number or position of segments, providing versatility while keeping each individual segment relatively simple in structure.
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
Enables easy installation without damaging the window and ensures complete light blocking by adjusting to fit various window widths and levels, ensuring reliable operation and no damage to the window.
Implementation Method 1
Each side rail is linearly extendable so that upper and lower ends of each side rail frictionally engage upper and lower faces of a window opening to secure the side rails, and the head assembly mounted thereon, in place within the window opening.
Data Source
AI summary
A screen assembly for a window includes a pair of parallel and spaced apart side rails locatable against respective sides of a window opening, and a head assembly including a roller upon which is wound a screen. The head assembly extends between the side rails and is adapted to be mounted on upper ends of the side rails to be supported thereon against and/or adjacent to an upper side of the window opening. Each side rail is linearly extendable whereby the upper and lower ends of the side rails frictionally engage upper and lower faces of a window opening to secure the side rails, and the head assembly mounted thereon, in place within the window opening.