Child Safety Seat Structural Support for Impact Force Reduction
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Solution Overview
Problem
Child safety seats often fail to adequately minimize head excursion and body forces during impacts, leading to increased risk of injury due to improper installation and high center of gravity, which can result in severe head injuries and other trauma.
Innovation Solution
The child safety seat design features adjustable seat supports with bends for secure attachment straps, a pivotally attached base, and strategically located apertures for vehicle belt integration, along with energy-absorbing materials and padding, to reduce rotational forces and lower the center of gravity, thereby minimizing head excursion and impact forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the child safety seat is installed with a high center of gravity configuration, then the seat structure is simpler and easier to manufacture, but the head excursion and body forces during impact increase leading to higher injury risk
Solution Approach 1:
The seat support is divided into multiple segments including a first support portion, second support portion, and intermediate portion. This segmentation allows the support structure to be configured at different heights and angles, enabling the center of gravity to be lowered while maintaining structural simplicity and ease of manufacture.
Solution Approach 2:
The seat support extends in multiple dimensions - vertically to lower the center of gravity, horizontally to provide lateral support, and at angled orientations to optimize impact force distribution. This multi-dimensional configuration reduces head excursion and impact forces without complicating the manufacturing process.
2Ease of operation
If the attachment straps are made non-adjustable with fixed length, then the installation system is simpler and faster to install, but the ability to secure the seat properly in different vehicle configurations is reduced
Solution Approach 1:
The attachment straps are designed as adjustable length straps that can be dynamically configured during installation. The bends in the seat support provide guide points that help position the straps correctly, while the adjustability allows optimization for different vehicle seats and child sizes, balancing installation speed with adaptability.
3Ease of manufacture
If the seat support is configured without bends for strap attachment, then the structural integrity is higher and easier to manufacture, but the secure retention of the seat and minimization of head excursion is compromised
Solution Approach 1:
The bends are pre-formed in the seat support at specific locations where attachment straps need to be secured. These pre-configured bends serve as ready-made attachment points that guide the straps into proper positions, ensuring secure retention and minimizing head excursion without requiring complex additional structural elements.
Data Source
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AI summary
A safety seat (100) configured for installation in a vehicle includes a seat shell that includes a bottom (117), a back (119), and first and second sides. The safety seat also includes 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 (117) of the safety seat (100) may be located between the seat supports. The safety seat may include attachment straps (154,155) 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.