Elastic Rubber Seal Profile Corner Fastening
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Solution Overview
Problem
Existing devices for fastening rubber-elastic sealing profiles on motor vehicle door window frames struggle to maintain a reliable tight fit, especially in critical corner areas where heavy loads are applied during vehicle operation.
Innovation Solution
A pin-shaped clip is inserted from the outside to create a form-fitting connection between the sealing profile and the window frame, utilizing a rounded, material-reinforced corner part and U-shaped retaining strips, with barbs and a sealing section to ensure secure positioning and prevent moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing profile is attached and glued to the edge flange, then the sealing profile can be secured on the window frame, but the tight fit in the corner area is critical and unreliable under heavy loads
Solution Approach 1:
The sealing profile is segmented into a corner part with reinforced material and straight sections. The corner part is specifically designed with increased material strength and a rounded cross-section to handle heavy loads, while the straight sections maintain the sealing function. This segmentation allows the corner area to be optimized for load bearing independently from the rest of the sealing profile.
Solution Approach 2:
The corner part of the sealing profile has locally enhanced material properties with reinforced material and a rounded cross-section, providing localized strength where heavy loads are applied. This local quality enhancement ensures that the corner area can withstand passenger support loads while the rest of the sealing profile maintains its sealing function.
2Ease of operation
If a fastening element is inserted from the outside to secure the sealing profile, then the assembly is easy to perform, but the sealing profile must be designed with specific corner parts and recesses
Solution Approach 1:
The corner part of the sealing profile is designed with integrated recesses that directly receive the fastening element. The fastening element inserts from the outside and engages with the recesses in the corner part, creating a self-aligning connection that simplifies assembly. The design allows the sealing profile to serve its own fastening function through the integrated recesses.
3Strength
If the corner part is made with rounded, material-reinforced design, then the connection strength is improved, but the manufacturing complexity increases
Solution Approach 1:
The corner part is merged as an integral component with the sealing profile, formed in one piece with the retaining strips. The rounded cross-section and material reinforcement are incorporated into the same molding process, eliminating the need for separate manufacturing steps or assembly operations. This merging reduces manufacturing complexity while maintaining the strength benefits.
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 solution provides a reliable, easy-to-assemble, and effective seal in the corner area, ensuring a tight fit and preventing moisture ingress while allowing for easy installation and dismantling.
Implementation Method 1
a rubber-elastic sealing profile (7), which is pushed and/or glued onto a peripheral window frame (1) of a motor vehicle door
Data Source
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AI summary
The device has a fastening element (17) which protects the sealing profile in the corner area at the window frame, where the fastening element is inserted from outside. The corner area is formed with a rounded, material reinforced molded corner part (7b), by which the fastening element is connected with the window frame. An independent claim is also included for a method for fastening a sealing profile on a window frame.