Automotive Rear Seat Backrest Frame with Wire Extension
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Solution Overview
Problem
Existing rear seat backrest frames in motor vehicles are not adaptable to different seat row widths, are excessively heavy, and suffer significant deformation during luggage impacts, posing safety concerns for rear row occupants.
Innovation Solution
A rear seat back frame design featuring a main support element with a welded, bent steel wire extension that forms an M-shape, providing adaptability to varying seat widths and enhanced resistance to luggage impacts, while using a lightweight steel wire structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional rigid tubular frames with steel wire networks are used, then structural strength and stability are improved, but weight increases significantly
Solution Approach 1:
The frame is divided into modular components: a universal main support element and adjustable extension elements. This segmentation allows the frame to be customized for different vehicle configurations without requiring complete frame replacements, reducing overall weight while maintaining strength where needed.
Solution Approach 2:
The frame incorporates adjustable extension elements that can be positioned or removed based on specific vehicle requirements. This dynamic adaptability allows the frame to optimize its weight-strength ratio for different applications, using material only where structurally necessary.
2Strength
If frames are customized for specific vehicle widths, then structural performance is optimized, but adaptability to different vehicles is reduced
Solution Approach 1:
The main support element is designed as a universal component that can be used across multiple vehicle types and configurations. Extension elements are added or adjusted to accommodate different rear seat row widths, allowing a single base design to serve multiple functions and vehicle models.
Solution Approach 2:
By separating the frame into a universal main support element and configurable extension elements, the design achieves both structural optimization for specific applications and broad adaptability across different vehicle platforms.
3Strength
If solid metal sheets and sections are used for reinforcements, then resistance to luggage impact is improved, but weight increases
Solution Approach 1:
The frame combines tubular metal structures with steel wire networks in a composite construction. This composite approach provides high impact resistance through the synergistic effect of the tubular frame (providing overall structure) and steel wire network (providing localized reinforcement), while using material more efficiently than solid metal sections.
Solution Approach 2:
The tubular frame elements use curved and optimized cross-sectional geometries that provide high strength-to-weight ratios, distributing impact forces more effectively than flat metal sheets while using less material.
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 design allows for weight reduction and improved safety by adapting to different seat row widths and resisting luggage impact forces, addressing the limitations of traditional frames in terms of adaptability and safety.
Implementation Method 1
the bent steel wire comprises six curved bends forming substantially an M in rotation of 90°C and whose central part is flat and in contact support on the element of main support
Implementation Method 2
the two fixing points of the bent steel wire are made by welding
Data Source
Figure 1~2
AI summary
The invention relates mainly to a framework for the backrests of seats in the back row of a motor vehicle, which is essentially characterized in that it comprises at least one main support element (2) forming the framework of a side seat backrest, and an extension support element (3) secured to the main support element (2) and made using a wire-like support (20) forming the framework of the backrest of the middle seat. The invention also relates to a motor vehicle equipped with at least one such framework.