Weather Strip Attachment Base Segmentation for Positioning Accuracy
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Solution Overview
Problem
The existing weather strip attachment systems for automobile doors, which integrate a hollow seal and attachment base with a seal lip, face issues with inaccurate positioning and complicated installation due to the use of double-sided adhesive tape, leading to potential damage and sealing defects.
Innovation Solution
The weather strip is designed with a solid fitting portion for the attachment base that can be accurately positioned on the door frame, and a deformation origin portion between the hollow seal and attachment base allows for easy alignment and secure attachment using a double-sided adhesive tape, reducing meandering and improving workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hollow seal portion and attachment base portion are integrated together and attached using double-sided adhesive tape, then the number of parts is reduced, but the attachment position accuracy deteriorates and the attachment process becomes complicated
Solution Approach 1:
The attachment base portion is divided into two functional zones: a solid fitting portion for precise mechanical positioning on the door frame, and an elastic seal lip portion for sealing. This segmentation allows each part to perform its specific function optimally while maintaining overall integration.
Solution Approach 2:
Different portions of the attachment base portion have different material properties: the fitting portion is made solid for dimensional stability and positioning accuracy, while the seal lip portion is made elastic for sealing performance. This local differentiation of material properties resolves the contradiction between integration and positioning accuracy.
2Device complexity
If the attachment base portion is made of elastic material to integrate with the seal lip portion, then the integration is achieved, but the positioning accuracy deteriorates due to elastic deformation
Solution Approach 1:
The attachment base portion is segmented into a solid fitting portion for positioning and an elastic seal lip portion for sealing. This segmentation allows the elastic material to provide integration while the solid portion maintains positioning accuracy.
Solution Approach 2:
The attachment base portion exhibits local quality differentiation: the fitting portion has solid material properties for dimensional stability, while the seal lip portion has elastic properties for sealing. This resolves the contradiction between material elasticity and positioning precision.
3Ease of operation
If the double-sided adhesive tape is applied after positioning the attachment base portion, then the positioning can be adjusted, but the tape cannot be reused if misplaced and the process becomes complicated
Solution Approach 1:
The fitting portion is positioned on the door frame before the adhesive tape is applied. This preliminary mechanical positioning establishes the correct location, and the adhesive tape is then applied as a secondary securing method rather than the primary positioning method, allowing for adjustment before final attachment.
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
This configuration reduces the number of parts, enhances the accuracy of the attachment position, and simplifies the installation process, resulting in improved sealing and appearance by ensuring the weather strip is properly aligned and attached.
Implementation Method 1
a double-sided adhesive tape T is provided. This double-sided adhesive tape T is stuck on the door frame such that the inner side of the passenger compartment of the weather strip, i.e., the hollow seal portion is attached to the door frame
Implementation Method 2
The hollow seal portion and the seal lip portion are elastically deformed by coming into contact with a vehicle body panel when the door is in a closed state, so as to serve to seal the gap between the peripheral edge portion of the door and the opening portion of the vehicle body
Data Source
AI summary
A double-sided adhesive tape is provided on a hollow seal portion. A door frame includes an sticking surface, and a protruding portion protruding and provided on an outer side of a passenger compartment than the sticking surface. An attachment base portion includes a solider portion than the seal lip portion, and the solider portion includes a fitting portion 12c fitted to the protruding portion. A deformation origin portion is provided between the hollow seal portion and the attachment base portion.