Circular Longitudinal Element Fastening Screening Body to Bottom Element
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Solution Overview
Problem
Existing screening arrangements for windows require high accuracy and are costly to manufacture, with a risk of the screening body detaching from the bottom element, leading to aesthetic and functional issues.
Innovation Solution
A method using a circular longitudinal element with defined projections and a slot configuration that allows for secure and easy attachment of the screening body to the bottom element, reducing the need for precise alignment and deformation, and enabling automated assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an oblong slat is used to attach the screening body to the bottom element, then the screening body can be secured to the bottom element, but the assembly requires high precision and is difficult to automate, increasing production cost
Solution Approach 1:
The patent replaces the oblong slat with a circular longitudinal element (rod) that has a round cross-section. This circular geometry allows the element to be easily inserted into a corresponding circular slot in the bottom element without requiring precise angular alignment. The round shape provides inherent self-centering and tolerance to manufacturing variations, enabling automated assembly while maintaining secure fastening through the circular geometry's ability to distribute forces evenly.
Solution Approach 2:
The patent changes the geometric parameters of the fastening element from an oblong cross-section to a circular cross-section. This parameter change fundamentally alters the assembly process by eliminating the need for precise angular positioning that characterizes oblong shapes. The circular geometry with its continuous symmetry allows for easier manufacturing and automated insertion, while the diameter can be optimized to provide sufficient friction and mechanical interference for secure fastening.
2Reliability
If the bottom element is designed to accommodate an oblong slat, then the slat can be secured, but the bottom element requires larger dimensions, making it unhandy and aesthetically less appealing
Solution Approach 1:
The circular longitudinal element with round cross-section allows for a more compact bottom element design compared to accommodating an oblong slat. The circular geometry is more space-efficient and allows the bottom element to have smaller overall dimensions while maintaining the same fastening security. This reduction in size improves both the aesthetic appeal and the ease of handling the bottom element during installation and use.
3Reliability
If a pointed projection is used to fasten the screening body, then secure fastening is achieved, but the screening body can be easily ripped apart and destroyed, and manufacturing is expensive
Solution Approach 1:
The patent changes the fastening mechanism from a pointed projection that concentrates force to a circular longitudinal element that distributes force along its length and circumference. This parameter change from a localized point contact to a distributed circular contact area prevents stress concentration that would cause the screening body to rip or tear. The circular geometry provides uniform force distribution around the entire circumference of contact, maintaining fastening security while preserving the integrity of the screening body material.
Data Source
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AI summary
A screening arrangement (1) and a method for screening an aperture of a frame are provided. The screening arrangement (1) comprises a screening body (6) and a bottom element (7). Said screening body (6) includes an end portion (62) attached to said bottom element (7). Said end portion (62) of said screening body (6) and a longitudinal element (63) are positioned in a slot (73) formed by a first (74) and a second (7a) projection of said bottom element (7). Said end portion (62) of said screening body (6) surrounds at least a major part of the circumferende of said longitudinal element (63), and said first projection (74) of said bottom element (7) is inclined towards said second projection (7a). Said longitudinal element (63) and said end portion (62) of said screening body (6) is thus jammed in between said first and second projections (74, 7a) and thus fastened to said bottom element (7)).