Vehicle Retaining Hook Structure With Slitted Side Walls
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Solution Overview
Problem
Existing hook devices for vehicles face insertion resistance issues due to the width of shaft portions being larger than the case opening, leading to degraded load-bearing performance when trying to reduce insertion resistance.
Innovation Solution
A holding device design featuring a case member with slits in the side wall portions between the insertion opening and shaft hole portions, allowing the shaft portions to be longer and reducing insertion resistance while maintaining improved load-bearing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the width of shaft portions is reduced to reduce insertion resistance, then the ease of operation is improved, but the load bearing performance is degraded
Solution Approach 1:
The side wall portions of the case member are segmented by introducing slits, which divide the wall structure into multiple sections. This segmentation allows the side walls to flex and deform during insertion, reducing insertion resistance, while the overall structural integrity and load bearing capacity are maintained through the distributed slit configuration.
Solution Approach 2:
The physical state of the side wall portions is changed by introducing slits that enable controlled deformation. During insertion, the side walls can elastically deform to accommodate the shaft portions, and then return to their original shape, effectively reducing insertion resistance without permanently compromising structural strength.
2Strength
If the shaft portions are made longer to improve load bearing performance, then the strength is improved, but the insertion resistance increases
Solution Approach 1:
The side wall portions are divided by slits into multiple segments that can independently deform. This allows longer shaft portions to be inserted by enabling the side walls to flex outward during insertion and then return to their original position, accommodating the increased length without proportionally increasing insertion resistance.
Solution Approach 2:
The side wall portions are transformed from a static rigid structure to a dynamic flexible structure through the introduction of slits. This allows the side walls to adapt their shape during the insertion process, dynamically accommodating longer shaft portions while maintaining ease of operation.
3Strength
If the shaft portions are made longer to improve load bearing performance, then the strength is improved, but the device complexity increases
Solution Approach 1:
The case member structure is segmented by adding slits, which are simple linear features that can be easily manufactured. This segmentation approach improves load bearing performance through longer shaft portions while adding minimal structural complexity, as the slits are straightforward geometric modifications rather than complex three-dimensional features.
Solution Approach 2:
The structural parameters of the case member are changed by introducing slits with specific dimensions and spacing. This allows optimization of the balance between structural strength and complexity, where the slits provide the necessary flexibility and strength improvement without creating overly complex manufacturing requirements.
Data Source
AI summary
One embodiment provides a retaining device. The retaining device includes a retaining member and a case member. The retaining member has a base and a shaft that protrudes from the side of the base. The case member includes: a frame which forms an opening; a pair of side walls which are erected from both side edges of the frame; and an insertion opening which is formed between the pair of side walls for inserting the retaining member from the rear side of the case member. A shaft hole is formed in each side wall, and the shaft is inserted into the shaft holes. A first slit is formed in each side wall and located between the insertion opening and the shaft hole.