Vehicle Seat Back Frame Load Distribution
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Solution Overview
Problem
Existing vehicle seats struggle to appropriately receive excessive loads from the body of a seated person during collisions, as the support is primarily from a single top plate main part, which is insufficient for distributing the load effectively.
Innovation Solution
A vehicle seat design featuring a seat back with individually adjustable front and rear back frame parts, supported by reclining adjusters and a controller that adjusts the inclination angle of these parts to distribute excessive loads across both frames, ensuring effective load reception during collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single top plate main part is used to support the body from the rear side, then the structure is simple, but it cannot appropriately receive excessive load during collision
Solution Approach 1:
The seat back is divided into multiple independent back frame parts (front back frame part and rear back frame part) that can be individually adjusted. Each part has its own reclining adjuster, allowing them to move independently to receive and distribute excessive load during collision, thereby improving reliability without requiring a completely complex new structure.
Solution Approach 2:
The back frame parts are configured with individual reclining adjusters that enable dynamic adjustment of each part's inclination angle. During normal use, parts can be adjusted for comfort; during collision, they can dynamically respond to excessive load by adjusting their positions independently, transforming a static structure into a dynamic load-reception system.
2Reliability
If the top plate side parts form a continuous shell-like shape, then the structure is integrated, but the load distribution during collision is insufficient
Solution Approach 1:
The continuous shell-like structure is segmented into discrete back frame parts (front and rear parts) that maintain individual adjustability. This segmentation allows each part to independently respond to collision forces, distributing the excessive load more effectively while avoiding the complexity of designing a completely new integrated structure.
Solution Approach 2:
Different back frame parts are given different local qualities through individual reclining adjusters, allowing each part to have optimized characteristics for load reception. The front and rear parts can be adjusted to different inclination angles, creating localized variations in load distribution that enhance overall collision resistance.
Data Source
AI summary
A vehicle seat including a controller configured to, in a case where an excessive external load in a front and rear direction, by which a first back frame part is configured to be pressed and bent toward a second back frame part, is applied to the first back frame part, adjust an inclination angle of each back frame part by driving and controlling a reclining adjuster so that the first back frame part can be pressed against the second back frame part by being bent due to the excessive external load, the first back frame part being one of a front back frame part and a rear back frame part of a seat back, and the second back frame part being another of the front back frame part and the rear back frame part.