Child Safety Seat Support Structure for Lower Head Excursion
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Solution Overview
Problem
Child safety seats often fail to adequately minimize head excursion and body forces during impacts, leading to potential injuries due to improper installation and high center of gravity, which can result in increased risk of injury from sudden changes in vehicle motion.
Innovation Solution
A child safety seat design featuring a seat shell with adjustable seat supports and attachment straps that pivotally attach to a base, allowing for secure installation in both forward- and rearward-facing positions, with strategically located bends to guide attachment straps and a lower center of gravity to reduce rotational forces during impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seat is securely attached to a fixed location within a vehicle using standard attachment points, then the seat can be properly installed, but high center of gravity and improper installation can still result in increased risk of injury from sudden changes in vehicle motion
Solution Approach 1:
The patent introduces a side support structure that extends laterally from the seat shell, creating a three-dimensional attachment system rather than relying solely on vertical attachment points. This lateral extension provides additional geometric constraints that reduce rotational movement and head excursion during impact, addressing the limitation of standard attachment points.
Solution Approach 2:
The side support is pre-configured with attachment features and geometric constraints that actively limit head excursion and body movement before an impact occurs. The structure is designed to maintain optimal occupant positioning and reduce the potential for injury by establishing mechanical constraints in advance, rather than reacting to impact forces.
2Stability of the object's composition
If the seat shell is positioned with the bottom between the seat supports, then the center of gravity is lowered, but the structural complexity increases due to the side support extensions
Solution Approach 1:
The side support structure is integrated with the seat shell as a unified component, where the side support extends laterally from the shell rather than being a separate attachment mechanism. This merging reduces the number of discrete parts and simplifies the overall structure while achieving the desired center of gravity positioning and impact protection.
Solution Approach 2:
The side support structure serves multiple functions: it provides lateral attachment for securing the seat to the vehicle, extends the attachment geometry to reduce rotational movement, and helps position the seat shell to lower the center of gravity. This multi-functionality reduces the need for separate components, simplifying the overall device complexity.
Data Source
AI summary
A safety seat configured for installation in a vehicle may include a seat shell that includes a bottom, a back, and first and second sides. The safety seat may also include a seat support configured to extend at least partially adjacent to the first side of the seat shell. A second seat support may extend at least partially adjacent to the second side. The bottom of the safety seat may be located between the seat supports. The safety seat may include attachment straps that are each attached at a first end to a fixed location within the vehicle and attached at a second end to a bend of the seat support that is configured to define an attachment point.