Door Trim Vacuum Attachment Side-Impact Absorption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle interior parts, such as door linings, face challenges in enhancing side-impact absorption capability due to reduced rigidity caused by holes for vacuum application, leading to ineffective deformation during collisions.
Innovation Solution
Incorporating thin portions between adjacent suction holes on a base plate covered with a top cover using vacuum application, where the thin portions and suction holes deform in conjunction, improving side-impact absorption by concentrating stress on deformable areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If holes are provided for vacuum application, then the top cover can be attached to the base plate, but the rigidity of the main body decreases and side-impact absorption is insufficient
Solution Approach 1:
The base plate is designed with locally varied thickness: thin portions between adjacent suction holes provide flexibility for deformation and impact absorption, while other portions maintain sufficient thickness to preserve overall structural rigidity. This local differentiation allows the structure to simultaneously achieve ease of manufacture with vacuum attachment and adequate strength for side-impact resistance.
2Strength
If thin portions are provided to improve side-impact absorption, then stress concentrates on thin portions during collision, but the thin portions and slits deform independently reducing overall effectiveness
Solution Approach 1:
The thin portions are strategically positioned between adjacent suction holes to create a integrated deformation system. During side collision, the thin portions deform in conjunction with the suction holes, merging their deformation behaviors into a unified response. This conjoint deformation maximizes the overall side-impact absorption capability of the door lining structure.
3Strength
If thin portions are provided between suction holes, then side-impact absorption improves, but partial clogging may occur during plastic molding
Solution Approach 1:
The thin portions are designed with controlled dimensions that are sufficient to provide the desired deformation and impact absorption characteristics, yet not so extreme as to cause complete clogging during plastic molding. By applying partial action (moderate thinning rather than extreme thinning), the invention achieves adequate side-impact absorption while maintaining manufacturability through the plastic molding process.
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
The solution enhances side-impact absorption by ensuring deformable areas absorb impact effectively while minimizing the impact on plastic molding, maintaining a smooth design surface and reducing partial clogging during molding.
Implementation Method 1
The base is covered with a top cover that is clung to a surface thereof by applying vacuum through the suction holes.
Data Source
AI summary
A door trim 10 having a side-impact absorption capability includes a base 22 having suction holes 23 and grooves 24 on a rear side between the adjacent suction holes 23. The base 22 is covered with a top cover 50 that is clung to a surface of the base 22 by applying vacuum through the suction holes 23. The suction holes 23 and the grooves 24 deform in conjunction with each other in a side collision and this improves the side-impact absorption capability.