Vehicle Seat Frame Asymmetric Coupling Brackets
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Solution Overview
Problem
In vehicle seat frames, the unequal deformation of right and left coupling brackets during rear collisions leads to uneven load distribution, compromising safety due to differences in load on brackets coupling the seat back and cushion frames.
Innovation Solution
The vehicle seat frame design includes adjustable deformation amounts for right and left coupling brackets by differentiating the deformability of their weak portions, with varying shapes and offset amounts to ensure balanced deformation during impact absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the right and left coupling brackets have the same deformability, then the structure is simple and symmetric, but the deformation amounts become unequal when loads on the brackets are different, compromising safety
Solution Approach 1:
The patent applies asymmetry by making the weak portions of the right and left coupling brackets different from each other. Specifically, the weak portion of the coupling bracket on the side with the main driving portion of the height adjustment mechanism has different deformability compared to the weak portion on the other side. This asymmetric design ensures that even though the loads on right and left brackets are different, the deformation amounts become equal, resolving the technical contradiction between safety and structural simplicity.
2Reliability
If the weak portions of the coupling brackets are made to deform equally, then the load distribution is optimized, but the bracket shapes and structures become complex and different between right and left sides
Solution Approach 1:
The patent applies local quality by differentiating only the weak portions of the coupling brackets while keeping the rest of the bracket structures substantially the same. The weak portions are specifically designed with different deformability characteristics - the weak portion on the side with the height adjustment mechanism has reduced deformability compared to the other side. This localized differentiation optimizes load distribution without making the entire bracket design complex.
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 allows for balanced deformation of the coupling brackets, effectively reducing impact on the seat back frame and ensuring equal deformation between the right and left brackets, enhancing safety by optimizing load distribution during rear collisions.
Implementation Method 1
impact is absorbed by deformation of the weak portion
Implementation Method 2
Deformability upon impact absorption is different between a first weak portion provided at the first coupling bracket and a second weak portion provided at the second coupling bracket
Data Source
AI summary
Right and left brackets coupling a seat back frame and seat cushion frame together are configured to adjust an amount of deformation upon impact absorption. A vehicle seat frame includes a seat cushion frame, seat back frame, coupling bracket configured to couple a cushion side frame as a side frame of the seat cushion frame on one side of the vehicle seat frame and a seat back side frame as a side frame of the seat back frame on the one side, and coupling bracket configured to couple a cushion side frame as a side frame of the seat cushion frame on the other side and a seat back side frame as a side frame of the seat back frame on the other side. Deformability upon impact absorption is different between a weak portion provided at the coupling bracket and a weak portion provided at the coupling bracket.