Impact Shield Child Seat Geometry to Limit Child Rotation
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Solution Overview
Problem
Existing child seats with impact shields face challenges in securely holding children during accidents, particularly in preventing rotation of the child's upper body, which can lead to increased safety risks due to the design complexity of current solutions.
Innovation Solution
The child seat is configured such that the child's center of gravity is positioned at or slightly below the level of the rotation axis, preventing excessive rotation by aligning the center of gravity with the child and impact shield rotation axes, thereby simplifying the design and enhancing safety without the need for additional rotation-preventing structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional rotation-preventing structures are added to the child seat, then child rotation is prevented more effectively, but device complexity increases
Solution Approach 1:
The patent extracts the rotation prevention function from separate mechanical structures and integrates it into the fundamental geometric configuration of the child seat. By positioning the center of gravity at or below the rotation axis level, the system uses gravitational physics rather than additional mechanical components to prevent rotation, thereby maintaining reliability while reducing device complexity
Solution Approach 2:
The child seat design allows the child's own center of gravity to serve the rotation prevention function. The gravitational force acting on the child's mass automatically counteracts rotation tendencies during deceleration events, eliminating the need for external rotation-preventing structures and simplifying the overall device
2Reliability
If the center of gravity is positioned at or below the rotation axis level, then child rotation is reduced, but design constraints increase
Solution Approach 1:
The patent changes the critical parameter of center of gravity position relative to the rotation axis. By specifying that the center of gravity should be at or below the rotation axis level (within 8cm vertically and 5cm horizontally), the design uses a simple geometric parameter constraint to achieve rotation prevention without complex mechanisms
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
This configuration effectively reduces child rotation during deceleration events, enhancing safety by maintaining the child's position relative to the impact shield, even during sudden decelerations like frontal collisions, and simplifies the design to meet higher safety requirements.
Implementation Method 1
a centre of gravity of the child, at least in an initial state, at the beginning of a rotation of the child (in particular relative to the vehicle seat, optionally together with the main body) and/or at the beginning of a rotation of the child relative to the main body in the event of a (particularly sudden) deceleration of the (motor) vehicle or in the event of a frontal impact (collision with a structure in front of the vehicle), is at least approximately at or, preferably slightly, below a level at which a child rotation axis lies
Data Source
AI summary
The invention relates to a child seat, wherein the child seat comprises a main body for receiving a child and an impact shield for holding the child, wherein the child seat is configured such that a center of gravity of the child, at least in an initial state at the beginning of a sudden deceleration of the motor vehicle and/or at the beginning of a rotation of the child relative to the vehicle seat and/or at the beginning of a rotation of the child relative to the main body during a sudden deceleration of the motor vehicle, for example in the event of a frontal impact, is at least approximately at or below, preferably slightly below, a level at which a child rotation axis is located, about which rotation axis the child rotates with respect to the main body, as soon as the child starts to rotate with respect to the main body, and/or is at least approximately at or below, preferably slightly below, a level at which at least one impact shield rotation axis is located about which the impact shield can rotate with respect to the main body.