Vehicle Weather Strip Structure for Slit Hole Bonding Stability
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Solution Overview
Problem
Existing weather strips face a high risk of bonding failure at slit holes due to reduced rigidity in thin portions near clip insertion points, leading to bending and displacement issues.
Innovation Solution
A weather strip design featuring a holding portion with a thin portion for clip insertion and thick portions on both ends, extending in the short-side direction, enhancing rigidity and reducing bending, and incorporating a crank portion to avoid the holding portion, with protrusions for secure bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a thin portion is formed in the vicinity of the clip insertion hole to reduce thickness, then the weather strip can be inserted through the clip, but the rigidity decreases and bonding failure easily occurs
Solution Approach 1:
The patent applies local quality by creating a thin portion specifically at the clip insertion hole area to facilitate clip attachment, while simultaneously creating thick portions at both ends of the thin portion to maintain bonding strength. This localized variation in thickness allows each area to have the properties needed for its specific function without compromising the overall structure.
2Strength
If a thick portion is formed to surround the thin portion, then the rigidity increases, but the structure becomes more complex
Solution Approach 1:
The holding portion is segmented into distinct functional zones: a thin portion for clip insertion and thick portions at both ends for bonding support. This segmentation allows each zone to perform its specific function efficiently while maintaining a relatively simple overall structure that integrates seamlessly into the weather strip.
Data Source
AI summary
Risk of occurrence of a bonding failure at the time when a slit hole is bonded is decreased. A weather strip to be attached to a vehicle has a holding portion having a thin portion where an insertion hole through which a clip is to be inserted is formed, and a thick portion that is formed on at least one of both end sides of the thin portion in the longitudinal direction of a base portion, which is to be attached to an attachment part of the vehicle, so as to be thicker than the thin portion and so as to extend in the short-side direction of the base portion.