Profiled Clipping Bead for Vehicle Glazing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle glazing with profiled beads for clipping cover pieces often reduces clear visibility due to the width of the opaque surfaces required for fixation, as the inner wings and adhesive beads must be masked, limiting the amount of light that can pass through.
Innovation Solution
A laminated glazed element with a profiled bead featuring an intermediate wing between the outer and inner glass sheets, allowing reliable clipping without disrupting the lamination, and reducing the width of the opaque surface needed for masking, thereby enhancing visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inner wing is used to fix the profiled bead to the glazed element, then reliable clipping is achieved, but the width of the opaque masking strip increases, reducing visibility
Solution Approach 1:
The intermediate wing is positioned in the interlayer space between the outer and inner glass sheets, utilizing the third dimension (depth/thickness) rather than extending the masking strip horizontally. This vertical positioning in the lamination structure allows the bead to be fixed reliably without increasing the horizontal width of opaque surfaces, thus maintaining visibility while achieving secure clipping.
2Strength
If the inner wing is made wider to ensure good adhesion, then clipping force is improved, but the view through the glazed element is reduced
Solution Approach 1:
The adhesion strength is enhanced by increasing the width of the intermediate wing in the interlayer space (horizontal dimension within the lamination), not by extending it toward the outer face. This allows the wing to have sufficient bonding area with the outer glass sheet while remaining confined within the interlayer thickness, thus improving adhesion without reducing light transmission through the glazing.
3Ease of manufacture
If the profiled bead structure is simplified, then manufacturing is easier, but clipping reliability may be compromised
Solution Approach 1:
The profiled bead is designed with an intermediate wing that serves multiple functions simultaneously: it provides adhesion to the outer glass sheet, ensures reliable clipping through the groove-harpoon mechanism, and maintains a compact structure that is easy to manufacture. The groove geometry itself is optimized to provide both the clipping function and the structural integrity needed for reliable attachment, combining multiple functions in a single integrated component.
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The invention relates to glazing (1), especially glazing for a vehicle, comprising a laminated glazed element (2) comprising an outer pane of glass (3), an inner pane of glass (5) and an interlayer pane made of a plastic material (4) arranged between said two panes of glass, characterised in that said profiled bead (6) comprises, as seen in the cross-section, an interlayer wing (61) arranged between the interlayer face of said outer pane of glass (3) and the interlayer face (50) of said inner pane of glass (5).