Belted Pivot Link Reduces Child Seat Forward Rotation
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Solution Overview
Problem
Child safety seats secured with vehicle seat belts or Isofix anchorage systems tend to rotate excessively during frontal collisions, posing a risk of injury to children due to the lack of effective anti-rotation mechanisms in belted child safety seats, particularly for rearward-facing installations required by UN ECE regulation 129 until the child is 15 months old.
Innovation Solution
A child safety seat design featuring a belted pivot link system, where a pivoting component connected to the seat base and an engaging member with the safety belt allows for two coupled rotations, translating forward rotation into downward movement, thereby reducing the risk of forward rotation and enhancing safety through a rotation compensation mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a child safety seat is secured with a vehicle seat belt, then the installation is simplified and does not require additional anchorage units, but the seat tends to rotate excessively about the lateral axis during frontal collisions
Solution Approach 1:
The patent applies the dynamics principle by making the seat base rotatable relative to the seat shell during normal operation, allowing the base to rotate forward during frontal collisions to convert rotational motion into translational movement. This dynamic adjustment enables the system to adapt to collision forces while maintaining simplified seat belt installation, resolving the contradiction between ease of installation and rotation stability.
2Stability of the object's composition
If an anti-rotation device is added to prevent excessive rotation, then rotation stability is improved, but the device complexity increases
Solution Approach 1:
The patent merges the anti-rotation function with the existing seat base and seat shell structure. The seat base itself is designed to rotate relative to the seat shell, integrating the anti-rotation mechanism into the fundamental components rather than adding separate complex devices. This combination achieves rotation stability while minimizing additional structural complexity.
Solution Approach 2:
The system employs self-service by allowing the seat base to automatically rotate forward during frontal collisions through the coupled rotation mechanism. This self-activating anti-rotation function eliminates the need for complex external control systems or additional active components, achieving rotation stability through the inherent mechanical design.
3Stability of the object's composition
If the seat base is made rigidly fixed to the seat shell, then rotation stability is improved, but the ability to convert rotational motion into translational movement during collisions is reduced
Solution Approach 1:
The patent applies dynamics by designing the seat base to be rotatable relative to the seat shell, enabling the system to adapt its configuration during frontal collisions. This rotational degree of freedom allows the base to convert rotational motion into translational movement, simultaneously achieving rotation stability and motion conversion capability through dynamic adjustment rather than rigid fixation.
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 belted pivot link system effectively reduces forward rotation of the child safety seat during frontal impacts by converting rotational motion into translational movement, minimizing the risk of injury by compressing the vehicle seat cushion and maintaining the child's position within the seat.
Implementation Method 1
a pivoting component (2) connected pivotably to said base member (1); and an engaging member (3) coupled to said pivoting component (2) such that a movement of said engaging member (3) in a certain direction relative to said base member (1) causes said pivoting component (2) to pivot away from said base member (1)
Data Source
AI summary
The invention relates to a child safety seat adapted to be secured with a safety belt of a vehicle, comprising a seat shell for receiving a child; and a seat base for being placed on a seat of the vehicle. The seat base comprises a base member coupled to the seat shell; a pivoting component connected pivotably to the base member; and an engaging member configured to engage with the safety belt of the vehicle, wherein the engaging member is coupled to the pivoting component such that a movement of the engaging member in a certain direction relative to the base member causes the pivoting component to pivot away from the base member.