Child Car Seat Headrest With Mobile Side Cheeks for Side Impact
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Solution Overview
Problem
Existing child car seats inadequately protect a child's head and neck during side impacts, as the safety harnesses and airbags are ineffective in maintaining the head's immobility and adapting to the child's morphological changes during growth.
Innovation Solution
A child car seat with mobile side cheeks that can adjust between a transport position and a safety position, where the cheeks move closer to the child's head during a violent impact to prevent displacement and absorb impact forces, using mechanisms such as deformation zones and pyrotechnical or pressurized gas means to automatically activate the safety position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the side cheeks are separated to provide comfort and vision for the child, then the child's comfort and field of vision are improved, but the child's head can move or tap violently during impact, resulting in injury
Solution Approach 1:
The side cheeks are designed to be mobile rather than fixed, allowing them to dynamically adjust their position. During normal use, they remain separated for comfort and vision. During impact, they automatically move toward the head to provide protection, resolving the contradiction between comfort and safety.
Solution Approach 2:
The mobile side cheeks are pre-positioned to move toward the child's head upon impact detection. This preliminary positioning action occurs automatically during the impact event, preventing head movement and injury before the injury can occur.
2Reliability
If a deep and padded shell is used to absorb side impact energy for newborns, then head protection is improved, but the seat quickly becomes cramped and non-adapted to child growth
Solution Approach 1:
The side cheeks are designed as mobile components that can adjust their position and separation distance. As the child grows, the cheeks can be repositioned to maintain appropriate protection while accommodating the child's increasing size, making the seat adaptable across different growth stages.
Solution Approach 2:
The headrest is divided into a fixed back portion and mobile side cheeks that can independently adjust. This segmentation allows the protective side elements to adapt to the child's growth while maintaining the overall structure, providing both newborn protection and growth adaptability.
3Ease of operation
If the minimum separation of cheeks from the headrest is maintained for comfort and vision, then child comfort is improved, but the child's head cannot be prevented from moving or tapping during violent impact
Solution Approach 1:
The side cheeks transition from a static separated position to a dynamic mobile position upon impact. During normal conditions, they maintain separation for comfort. During impact, they automatically move closer to the head to prevent harmful displacement, resolving the contradiction between comfort and injury prevention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The car seat effectively reduces the risk of injury to the child's head, neck, and vertebral column by maintaining the head's alignment with the torso and distributing impact forces, providing both comfort and enhanced safety across various age stages without manual intervention.
Implementation Method 1
The car seat according to the invention is characterised in that said seat comprises means for controlling a displacement of at least a portion of said side cheeks between a first transport position, and a second safety position
Implementation Method 2
using mechanisms such as deformation zones and pyrotechnical or pressurized gas means to automatically activate the safety position
Data Source
AI summary
A juvenile vehicle seat includes a seat bottom, a seat back, and a headrest. The headrest includes a centered head-support panel and left and right side panels arranged to locate the centered head-support panel therebetween.