Vehicle Door Sealing Member Bead Stiffness Oscillation
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Solution Overview
Problem
Conventional sealing members for vehicle door panels often oscillate due to vehicle vibrations, leading to noise generation when the opening is large, as the covering portion cannot be properly connected to the door inner panel.
Innovation Solution
A sealing member with a covering portion featuring beads that protrude inward, providing increased stiffness and a contact portion that abuts the door inner panel, along with a pushing mechanism like a cable or trim member to secure the sealing member against the panel, preventing oscillation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a sealing screen is installed to cover the opening, then water or dust prevention is improved, but the covering portion oscillates due to vibrations causing noise
Solution Approach 1:
The patent applies local quality by adding beads only to specific areas of the covering portion that are prone to oscillation. These beads are strategically positioned to provide localized stiffness enhancement without modifying the entire sealing member, thereby preventing noise generation while maintaining the sealing function against water and dust.
Solution Approach 2:
The patent employs composite materials by integrating beads made of a material with different mechanical properties than the covering portion. The beads have higher stiffness and are combined with the flexible covering material to create a composite structure that resists vibration-induced oscillation while preserving the sealing screen's protective function.
2Area of stationary object
If the covering portion is made larger to cover the opening, then sealing effectiveness is improved, but the covering portion becomes more prone to oscillation
Solution Approach 1:
The patent addresses this contradiction by applying local quality through the strategic placement of beads on the covering portion. The beads are positioned in areas where oscillation is most likely to occur, providing localized stiffness enhancement that stabilizes the larger covering area without requiring the entire structure to be rigid.
Solution Approach 2:
The patent uses composite materials by combining the flexible covering material with stiffer bead materials. This creates a composite structure where the beads provide the necessary rigidity to prevent oscillation in the larger covering area, while the base material maintains flexibility for sealing effectiveness.
Data Source
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AI summary
A sealing member that mitigates oscillating noises and its installation method is provided. In the sealing member (4) for covering an opening (3a) formed at a door inner panel (3), at least one bead (8) is installed at a covering portion facing the opening (3a). Thus, the stiffness of the covering portion of the sealing member (4) is increased. It is therefore possible to prevent the covering portion from oscillating, thereby inhibiting the sealing member from generating the oscillating noises.