Vehicle Seat Panel Frame Bead Structure for Cantilever Load
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Solution Overview
Problem
Existing vehicle seat panel frames are prone to deformation under load due to cantilevered stress, which can cause bending, especially when load-bearing components like headrests or operation levers are attached, as they concentrate overload at specific points along the panel frame's fixed lines.
Innovation Solution
The panel frame is designed with a specific configuration including first and second fixed points, a fixed area, an overhang area, and a bead structure comprising first, second, and third bead pieces that extend across these areas, providing enhanced rigidity by distributing load and preventing bending through a cantilevered design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a bead of drawn shape is formed over a wide extension range of the panel surface to enhance rigidity, then surface rigidity is improved, but the panel frame may still deform under cantilever load at positions connecting upper and lower fixed points
Solution Approach 1:
The patent applies local quality by positioning specific bead pieces at critical locations rather than uniformly across the entire panel. The first bead piece is located at the upper end, the second bead piece at the lower end, and the third bead piece at the intermediate position, creating localized reinforcement zones that address the cantilever load distribution pattern without requiring universal reinforcement.
Solution Approach 2:
The bead structure is segmented into three distinct bead pieces rather than a continuous bead. This segmentation allows each bead piece to independently address specific stress zones: the first bead piece handles upper fixed point stresses, the second bead piece handles lower fixed point stresses, and the third bead piece handles intermediate stresses, collectively preventing deformation more effectively than a single continuous bead.
2Adaptability or versatility
If load acting portions such as operation levers or headrest support portions are set at shoulder portions of the panel frame, then functional requirements are met, but overload concentrates at positions on the line connecting upper and lower fixed points causing bending
Solution Approach 1:
The patent reinforces specific local areas where loads are most likely to be applied. By placing bead pieces at the upper end, lower end, and intermediate positions, the structure provides localized strengthening exactly where cantilever loads from shoulder-mounted components would create maximum stress, allowing functional placement while preventing bending.
3Stability of the object's composition
If the panel frame is fixed at multiple points (first fixed point, second fixed point, and third fixed point in fixed area), then structural stability is improved, but the overhang area still experiences cantilever stress without additional support
Solution Approach 1:
The bead structure is divided into three segmented pieces positioned at different locations: the first bead piece at the upper end near the first fixed point, the second bead piece at the lower end near the second fixed point, and the third bead piece at an intermediate position. This segmentation provides distributed reinforcement that complements the multiple fixed points, with each bead piece addressing the stress zone near its corresponding fixed point and collectively supporting the overhang area.
Solution Approach 2:
The patent adds reinforcement in a different dimensional approach by incorporating beads that extend in the width direction rather than only relying on fixed points in the height direction. The third bead piece, positioned between the first and second bead pieces and spaced apart from both, provides reinforcement in the width direction, creating a three-dimensional reinforcement pattern that effectively supports the overhang area against cantilever stresses.
Data Source
AI summary
A vehicle seat including a panel frame including a fixed area, an overhang area, and a bead including a first bead piece extending across the overhang area and the fixed area from a position in a height direction closer to a first fixed point than a second fixed point toward the second fixed point, a second bead piece extending across the overhang area and the fixed area from a position in the height direction closer to the second fixed point than the first fixed point toward the first fixed point, and a third bead piece formed across the overhang area and the fixed area in a state of being provided between the first bead piece and the second bead piece and spaced apart from both the first bead piece and the second bead piece with a general surface provided therebetween.