Adjustable Window Screen Side Rail with Reinforcement
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Solution Overview
Problem
Existing window screening arrangements face challenges in accommodating different window sizes without compromising appearance or operational smoothness, as traditional adjustment methods often result in visible joints or impaired functionality.
Innovation Solution
The solution involves side rails with a weakening portion and a reinforcement member that can be broken off to adjust length, allowing for versatile application across multiple installation positions while maintaining structural integrity and aesthetics, using a plate-shaped reinforcement member that bridges the break-off section and remaining section, and a spacer member that fits into apertures for additional support and guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the side rail is made adjustable to fit different window sizes, then the adaptability is improved, but the structural strength deteriorates due to the presence of joints or weakening portions
Solution Approach 1:
The side rail is divided into a remaining section and a break-off section by the weakening portion, allowing the rail to be segmented into different lengths while maintaining the appearance of a continuous structure. The reinforcement member spans across the weakening portion to maintain structural integrity during the supply condition.
Solution Approach 2:
The weakening portion is pre-formed in the side rail during manufacturing, but the actual breaking action is deferred to the installation stage. This allows the side rail to maintain full strength during transportation and storage, and only becomes vulnerable when the user intentionally breaks it to the required length.
Solution Approach 3:
The reinforcement member acts as an intermediary element that temporarily strengthens the side rail at the weakening portion during the supply condition, preventing accidental damage while allowing intentional breaking during installation when the reinforcement member is removed.
2Ease of operation
If the side rail includes a weakening portion for length adjustment, then the ease of operation is improved, but the reliability deteriorates due to risk of damage at the weakening portion
Solution Approach 1:
The reinforcement member provides beforehand cushioning by strengthening the side rail at the weakening portion during the supply condition, preventing accidental damage during handling and installation. The reinforcement member is removed only when intentional breaking is required.
Solution Approach 2:
The side rail transitions from a static, always-weak structure to a dynamic structure that is strong during supply (with reinforcement member) and becomes easily breakable during installation (after reinforcement member removal). The properties of the side rail change based on the installation stage.
3Adaptability or versatility
If an extension member is used to adjust the side rail length, then the adaptability is improved, but the device complexity increases due to additional steering elements and joints
Solution Approach 1:
The invention extracts the adjustment mechanism from a complex external extension member system and integrates it directly into the side rail structure itself through the weakening portion. This eliminates the need for separate extension members and their associated steering elements, reducing overall device complexity.
Solution Approach 2:
The adjustment function is merged with the side rail structure by incorporating the weakening portion directly into the rail. The side rail itself becomes both the structural element and the adjustment mechanism, eliminating the need for separate adjusting components.
4Manufacturing precision
If the side rail is delivered in fixed sizes to match different window dimensions, then the manufacturing precision is improved, but the adaptability deteriorates requiring multiple sizes for different installations
Solution Approach 1:
A single side rail design with a weakening portion serves multiple functions: it can be delivered in one standard size and then broken to multiple different lengths to fit various window dimensions. This universal design eliminates the need to manufacture and stock multiple different sized rails.
Solution Approach 2:
The length parameter of the side rail is changed after manufacturing by breaking at the weakening portion. Instead of manufacturing different lengths with different parameters, the same rail is transformed into different effective lengths through the breaking process, maintaining manufacturing precision while achieving parameter variability.
Data Source
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AI summary
A screening arrangement (1) for a window and adapted to be mounted in a frame (2) of the window, having a supply condition and a mounted condition including at least two installation positions, the screening arrangement comprising a screening body (6) and two side rails (8) having a pre-defined length corresponding to a first installation position and at least one adjusted length corresponding to a respective at least one other installation position, the side rails (8, 9) being provided with a weakening portion (810) and a reinforcement member (60). Furthermore the invention relates to a method of mounting such screening arrangement in a window.