Vehicle Seat Backrest Frames with Corner Pieces for Fitting Variants
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle seat designs with peripherally closed backrest frames require complex tools and high production costs due to the need for different fittings and side parts with varying dimensions, leading to increased deformation and limited material usage.
Innovation Solution
Incorporating a corner piece into the backrest frame that allows for the use of thin, high-strength steel side parts without direct contact with the lower crossmember, enabling geometric deformations and accommodating different fitting variants while maintaining identical intersections with the side parts and crossmembers, thus reducing production costs and allowing for flexible variant formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the backrest frame is peripherally closed with direct connection between side parts and lower crossmember, then structural stability is improved, but manufacturing complexity and cost increase due to different fittings requiring different tools
Solution Approach 1:
The backrest frame is segmented into side parts, lower crossmembers, and corner pieces as separate components. The corner pieces serve as intermediate connection elements that standardize the interface between side parts and crossmembers, allowing modular assembly with consistent tooling across different fittings variants.
Solution Approach 2:
Corner pieces are introduced as intermediary components between the side parts and lower crossmembers. These corner pieces provide standardized connection points that mediate the structural load transfer while maintaining consistent manufacturing interfaces, eliminating the need for custom fittings for each variant.
2Adaptability or versatility
If different fittings with varying dimensions are used to accommodate different functionalities, then adaptability is improved, but production costs increase due to requiring different tools for each variant
Solution Approach 1:
The corner pieces are designed as universal components that can accommodate different fitting variants through standardized connection interfaces. The corner pieces themselves can be varied in geometry to match different fitting dimensions, while maintaining the same standardized interface with side parts and crossmembers, thus enabling multi-functionality without requiring different manufacturing tools.
Solution Approach 2:
Different geometrical variants of corner pieces are used locally to match specific fitting requirements, while the main structural components (side parts and crossmembers) maintain standardized interfaces. This allows local adaptation to different functionalities while keeping the overall manufacturing process standardized and cost-effective.
3Weight of moving object
If side parts are made from thin high-strength steel, then weight is reduced, but deformation increases when forming geometrically larger deformations
Solution Approach 1:
The structural frame is segmented into thin-walled side parts made from high-strength steel and thicker corner pieces. The corner pieces, being thicker and more rigid, absorb the geometric deformations during manufacturing, while the thin side parts maintain their shape with minimal deformation, enabling weight reduction without sacrificing manufacturing precision.
Data Source
AI summary
A vehicle seat, in particular a motor vehicle seat, has a seat part and a backrest which is provided with a backrest frame which runs all around as a load-bearing structure. The backrest frame has a lower crossmember, two side parts and an upper crossmember. The backrest can pivot relative to the seat part by at least one fitting which is attached to the backrest frame. At least one corner piece is provided as part of the backrest frame, which corner piece connects the lower crossmember to one of the seat parts. The fitting is attached to the corner piece.