Child Safety Seat Frame Structure Against Lateral Collapse
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Solution Overview
Problem
Conventional child safety seats collapse during severe impacts due to seat belt stretching, allowing children to collide with interior parts of the vehicle and suffer injuries.
Innovation Solution
A child safety seat design comprising an inner member made of shock-absorbing material, an outer member of hard plastic, and a support frame with subframe units that enhance lateral rigidity, allowing the seat to resist lateral pulling forces without collapsing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the child safety seat uses rigid wing segments to prevent lateral impact, then lateral protection is improved, but during severe impact the seat belt stretches and the wing segments collapse, allowing the seat to move and the child to collide with interior parts
Solution Approach 1:
The support frame is divided into multiple subframe units (first subframe unit, second subframe unit, third subframe unit) that are distributed throughout the seat structure. These segmented frame units work together to distribute and resist lateral forces, preventing collapse while maintaining overall structural integrity during severe impacts
Solution Approach 2:
The child safety seat combines different materials with complementary properties: the inner member uses shock-absorbing material to dissipate impact energy, while the outer member and support frame use rigid materials to maintain structural strength. This composite approach allows the seat to both absorb shock and resist lateral forces without collapsing
2Loss of energy
If the seat belt stretches during impact to absorb energy, then impact energy is reduced, but the pulling force causes the wing segments to collapse and creates space for the seat to move
Solution Approach 1:
Different parts of the seat structure have different mechanical properties optimized for their specific functions: the inner member uses soft shock-absorbing material for energy dissipation, while the outer member and support frame use rigid materials for strength. The support frame units are strategically positioned to resist pulling forces at critical locations where the seat belt applies force
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 design provides enhanced structural strength and safety by preventing the child safety seat from moving within the seat belt during impacts, ensuring the child's safety by maintaining stability and preventing collisions with the vehicle's interior.
Implementation Method 1
The inner member is made of shock-absorbing material
Data Source
AI summary
A child safety seat includes an inner member, an outer member, and a support frame. The inner member has a seat part and a backrest part that extends upwardly from a rear end and lateral ends of the seat part. The outer member has a rear portion that is disposed behind the backrest part of the inner member, and a front portion that extends from a periphery of the rear portion and that is coupled to the inner member. The support frame includes a first subframe unit that is disposed behind and adjacent to the inner member and that is connected to the outer member, and a second subframe unit that extends between the inner and outer members from the first subframe unit.