Airbag Flap-Hinge Assembly With Clearance for Foam-Coated Deployment
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Solution Overview
Problem
The deployment of airbag cushions is obstructed by foamed coatings on vehicle interiors, leading to slowed opening and reduced amplitude, and there is a risk of flap breakage during deployment, potentially causing passenger injury.
Innovation Solution
The hinge mechanism between the flap and the frame of the airbag channel orifice is positioned such that the upper surface of the hinge is above the frame's upper surface near their junction, creating a clearance for the foamed coating to compress without hindering the flap's pivoting, thus maintaining the coating's flexibility and preventing breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a foamed coating is applied to the rigid structure surface to homogenize appearance and provide flexibility, then the visual and tactile quality of the interior surface is improved, but the coating obstructs the opening of airbag mechanism flaps, slowing down deployment and limiting opening amplitude
Solution Approach 1:
The hinge is designed with an elevated upper surface that creates a vertical clearance zone above the frame surface. This dimensional elevation allows the foamed coating to be positioned below the hinge's rotation path, enabling the flap to pivot freely without compressing the coating, thus resolving the conflict between surface coverage and deployment speed
Solution Approach 2:
The elevated hinge structure acts as an intermediary element that separates the foamed coating from the flap's rotation path. By positioning the hinge's upper surface above the frame's upper surface, it creates a clearance zone that allows the coating to remain in place while not interfering with flap deployment, mediating between the need for surface coverage and free movement
2Shape
If a foamed coating is applied to the rigid structure surface, then visual homogenization is achieved, but the coating compresses between the airbag channel and the pivoting flap, limiting the amplitude of flap opening
Solution Approach 1:
The hinge is designed with an elevated upper surface that creates a vertical clearance zone above the frame surface. This dimensional elevation allows the foamed coating to be positioned below the hinge's rotation path, enabling the flap to pivot freely without compressing the coating, thus resolving the conflict between surface coverage and deployment speed
Solution Approach 2:
The hinge's upper surface is pre-positioned above the frame's upper surface in the closed position, establishing the clearance zone before deployment occurs. This preliminary geometric configuration ensures that during subsequent flap opening, the coating remains outside the compression zone, preventing amplitude limitation
3Shape
If a foamed coating is applied to the rigid structure surface, then aesthetic appearance is improved, but during cold deployment the flap experiences breakage or rupture at the hinge due to constrained opposing forces
Solution Approach 1:
The elevated hinge structure acts as an intermediary element that separates the foamed coating from the flap's rotation path. By positioning the hinge's upper surface above the frame's upper surface, it creates a clearance zone that allows the coating to remain in place while not interfering with flap deployment, mediating between the need for surface coverage and free movement
Solution Approach 2:
The harmful compressive effect of the foamed coating on the hinge mechanism is eliminated by extracting the coating from the compression zone. The hinge's elevated upper surface removes the coating from the critical area where it would cause stress concentration and potential breakage, allowing safe deployment
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 ensures the airbag cushion deploys effectively with the desired amplitude and speed, reducing the risk of flap breakage and ensuring passenger safety by allowing the foamed coating to compress without obstructing the hinge mechanism.
Implementation Method 1
the thickness of the foamed coating positioned at the hinge is caused to be compressed between, on the one hand, the peripheral surface of the airbag channel and, on the other hand, the upper surface of the pivoting flap
Implementation Method 2
the intermediate foamed thickness brings a certain flexibility to the touch of the surface of the interior
Data Source
Figure 1~2
AI summary
Airbag mechanism assembly combining a flap and its hinge with at least a portion of the channel orifice frame. The invention relates to an assembly comprising a flap (1) and at least one portion of the frame (2) of the airbag channel orifice (3) connected to each other by a joining hinge (4), characterized in that, in a closed position of the flap (1), the upper surface (41) of the hinge (4) is positioned above the upper surface (21) of the portion of the frame (2) of the airbag channel orifice (3) near its junction (24) with the hinge (4), so that the frame (2) which surrounds the orifice of the airbag channel (3) and the hinge (4) associated with the flap (1) are positioned at different levels of a virtual axis arranged substantially perpendicular to the plane of the surface of the flap (1) and/or of the hinge (4) in the closed position and/or of the peripheral surface to the orifice of the airbag channel (3).