Vehicle Seat Frame Bent Protrusion Rear-Collision Support
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Solution Overview
Problem
Conventional vehicle seat frames are complex and have increased component portions, which complicate the structure for supporting the back of a seated person during a rear-end collision, affecting rear-end collision security.
Innovation Solution
A seat frame with a connection frame that includes a bent protrusion portion along its longitudinal direction, arranged between lateral frame portions, allowing smooth extension during load application, reducing the distance between the occupant's back and headrest, and maintaining rigidity through strategically placed flange portions and openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin plate is attached to upper and lower sub frames via a rod to support the back of the seated person during rear-end collision, then the back support function is improved, but the structure becomes complicated and component portions increase
Solution Approach 1:
The patent integrates the back support function directly into the connection frame by forming a bent protrusion portion that extends from the connection frame. This eliminates the need for separate resin plates and rods, merging multiple components into a single integrated structure that maintains the back support function while reducing complexity
Solution Approach 2:
The invention extracts the essential back support function from the complex assembly of resin plates and rods, and implements it through a simple bent protrusion portion of the connection frame. This extracts only the necessary structural element needed to achieve the safety function without unnecessary components
2Strength
If the connection frame is made rigid to maintain structural strength, then the frame strength is improved, but the ability to allow occupant movement during rear-end collision is reduced
Solution Approach 1:
The patent applies local quality by creating a bent protrusion portion with specific geometric characteristics (bent shape extending from the connection frame) that provides controlled flexibility in the region where occupant contact occurs, while the rest of the connection frame maintains its overall strength and rigidity for structural support
Solution Approach 2:
The bent protrusion portion is designed to dynamically respond to collision forces by deforming in a controlled manner, allowing the connection frame to adapt its stiffness characteristics based on the applied load, thus providing both strength and movement capability
Data Source
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AI summary
Provided is a seat frame for a vehicle seat capable of supporting the back of a seated person during a rear-end collision by using a simple structure and few component portions. The present invention is a seat frame for a vehicle seat S. The seat frame includes a top frame portion 11a on the top of the seat, lateral frame portions on the right and left of the seat, and a connection frame 30 connecting the tops of the lateral frame portions so as to bridge them. The connection frame 30 includes a bent protrusion portion 37 bent in the longitudinal direction and arranged in a standing condition from a surface formed by the connection frame 30, at a position between a pair of the lateral frame portions. The bent protrusion portion 37 is provided over the entire length of the up and down direction of the connection frame 30.