Vehicle Seat Panel Frame Bead Design for Rigidity
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Solution Overview
Problem
The existing vehicle seat panel frames are prone to deformation under load due to cantilevered stress, particularly at the overhang areas where loads from components like headrests or operation levers are applied, leading to potential bending and reduced rigidity.
Innovation Solution
The panel frame is designed with a bead structure comprising first and second bead pieces that extend across overhang and fixed areas, with extended portions into orthogonal areas, enhancing surface rigidity by distributing load and preventing bending along the line segment connecting fixed points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the panel frame is fixed at only two points (upper central and lower side positions), then the installation structure is simple, but the frame deforms under cantilever load in the overhang area
Solution Approach 1:
The patent applies local quality by adding a third fixed point specifically in the overhang area where cantilever loads are applied. This creates non-uniform fixation distribution - the overhang area gains additional support while the fixed area maintains standard fixation, locally addressing the deformation problem without redesigning the entire structure
Solution Approach 2:
The patent segments the panel frame into two distinct areas: a fixed area with standard fixation and an overhang area with enhanced fixation including a third fixed point. This segmentation allows different structural characteristics in different regions, optimizing both simplicity and strength where needed
2Strength
If a bead is formed over a wide extension range to enhance rigidity, then surface rigidity is improved, but the bead shape becomes complex and manufacturing difficulty increases
Solution Approach 1:
The bead is segmented into two distinct pieces: a first bead piece in the fixed area and a second bead piece in the overhang area. Each piece can be formed independently with simpler geometries, reducing manufacturing complexity while maintaining overall rigidity enhancement across the entire panel frame
Solution Approach 2:
Different bead configurations are applied to different areas: the first bead piece has a configuration suitable for the fixed area, while the second bead piece has a configuration optimized for the overhang area. This local optimization enhances rigidity where needed without requiring a uniformly complex bead design across the entire frame
Data Source
AI summary
A vehicle seat including a panel frame including a fixed area which is one area of the panel frame partitioned by a line segment connecting a first fixed point and a second fixed point and includes a third fixed point at which the panel frame is fixed to a vehicle main body at a position different from positions of the first and second fixed point, an overhang area which is another area of the panel frame partitioned by the line segment; and a bead including a first and second bead pieces which respectively extend across the overhang area and the fixed area, and one of the first and second bead pieces has an extended portion which extends into an orthogonal area which is an area orthogonal to a portion of the line segment running between the first and second bead pieces.