Automobile Glass Run Corner Engagement with Notch Insertion
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Solution Overview
Problem
Existing glass runs assembled to automobile window frames from outside the cabin often detach due to external forces, compromising safety and appearance, and current solutions like clips or adhesive tapes increase component count and costs, or degrade over time.
Innovation Solution
A configuration featuring outer and inner covers that cover the angled portion of the window frame from both sides, with a connecting portion inserted into a notch in the door member, ensuring secure assembly without additional components like clips or adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the corner engagement portion is made of elastic material to cover the angled portion, then safety and appearance are improved, but the engagement projection easily deforms and detaches under external force
Solution Approach 1:
The glass run is divided into multiple portions: the corner engagement portion made of elastic material for covering the angled portion, and the engagement projection made of rigid material for secure engagement with the garnish. This segmentation allows each portion to perform its specific function optimally - the elastic portion provides safety and appearance while the rigid projection provides reliable engagement resistance to detachment.
2Reliability
If a clip is used to fix the attachment extension to the window frame, then detachment resistance is improved, but the number of components and costs increase
Solution Approach 1:
The engagement projection is integrally formed with the corner engagement portion, merging the fixation function into the existing structure. This eliminates the need for separate clips or adhesive tapes, reducing the number of components while maintaining reliable fixation of the attachment extension to the window frame.
3Reliability
If adhesive tape is used to fix the attachment extension, then detachment resistance is improved, but component count increases and adhesion degrades over time
Solution Approach 1:
The engagement projection is designed as a rigid, durable structure that is integrally formed with the corner engagement portion. This replaces temporary adhesive solutions with a permanent mechanical engagement structure that does not degrade over time, ensuring long-term reliability of the attachment extension fixation.
Data Source
AI summary
Disclosed is a glass run in which a cover is not easily detached from a window frame, thereby ensuring safety and good appearance, while reducing the number of components and costs. A protruding portion 25 protruding in a longitudinal direction of a vehicle along an upper part of a window frame 3 is provided at a corner 27 of a glass run 1. The protruding portion 25 includes an outer cover 25a covering an outside, in a widthwise direction of a vehicle, of an angled portion A of the window frame 3, an inner cover 25b covering an inside, in the widthwise direction of the vehicle, of the angled portion A, and a connecting portion 25c connecting the outer cover 25a and the inner cover 25b to each other. The connecting portion 25c is inserted in, and assembled to, a notch 3e of the window frame 3.