Automotive Interior Hook Structure for Compact Load Rigidity
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Solution Overview
Problem
Conventional load-hanging hook structures in automobile interior components face issues with rigidity, size, weight, and cost due to stress concentration at the root of the support piece, leading to potential breakage and the need for additional components to enhance rigidity.
Innovation Solution
A load-hanging hook structure with a hook portion supported by first and second support portions from both inner upper and lower edge portions of the opening, featuring flange portions and a longitudinal rib for enhanced rigidity, allowing stress dispersion and reducing the size and weight of the component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single support piece is used to extend from the hook portion to the opening, then the structure is simple, but stress concentrates near the root causing breakage and insufficient rigidity
Solution Approach 1:
The single support piece is divided into two separate support pieces: a first support piece extending to the inner upper edge portion and a second support piece extending to the inner lower edge portion. This segmentation distributes the load and stress across multiple attachment points, preventing stress concentration at a single root location while maintaining structural simplicity.
2Strength
If the support piece is made longer to increase rigidity, then stress resistance improves, but the overall size of the hook structure increases
Solution Approach 1:
Instead of increasing the longitudinal distance of support pieces, the invention utilizes the width dimension of the opening by attaching support pieces to both the inner upper edge portion and inner lower edge portion. This dimensional approach provides adequate support and rigidity without extending the longitudinal length, thereby maintaining a compact opening size.
3Strength
If additional components such as brackets are added to enhance rigidity, then strength improves, but weight and part count increase
Solution Approach 1:
The invention integrates the support function directly into the hook structure by forming two support pieces as integral parts of the hook, rather than using separate additional components like brackets. This merging approach provides the necessary rigidity and strength while minimizing the number of parts and avoiding increased weight from additional components.
4Strength
If crank shapes or large arc portions are added to the support piece, then stress concentration is reduced, but the longitudinal distance and overall size increase
Solution Approach 1:
Rather than modifying a single support piece with crank shapes or large arcs, the invention segments the support into two separate pieces attached at different locations (inner upper edge and inner lower edge). This segmentation naturally distributes stress without requiring additional curved geometries, thereby avoiding increased longitudinal distance.
Data Source
AI summary
A load-hanging hook structure of an automobile interior component includes an opening formed in the automobile interior component, and a hook provided at a position slightly shifted out from the opening. The hook includes a hook portion extending in a width direction of the opening, a first support portion shaped so as to extend from the hook portion and be linked to an inner upper edge portion of the opening, and a second support portion shaped so as to extend from the hook portion and be linked to an inner lower edge portion of the opening. The hook is structured such that the hook portion is supported by the first and second support portions from sides of both of the inner upper and lower edge portions of the opening.