ISOFIX Connector Damping for Child Seat Rotation Control
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Solution Overview
Problem
Child safety seats with ISOFIX connectors tend to rotate and cause the child to tip forward during sudden vehicle deceleration, leading to potential head collisions with the front seat due to the lack of effective stabilization and rotation control.
Innovation Solution
A child safety seat design featuring pivotally connected connectors with a damper mechanism, including torsion springs and limiting members, to maintain the connectors in an initial pivotal position and limit rotation, thereby stabilizing the seat during deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the ISOFIX connector is rigidly fixed to the base, then the connection to the vehicle seat is stable, but the connector cannot absorb impact forces during sudden deceleration, causing the child safety seat to rotate and the child to tip forward
Solution Approach 1:
The connector is changed from a rigid fixed connection to a dynamic pivotal connection that allows controlled rotation. The pivot shaft enables the connector to rotate relative to the base, transforming the static rigid structure into a dynamic system that can adapt to impact forces during sudden deceleration, preventing excessive rotation and child tipping forward.
Solution Approach 2:
The connection state of the connector is changed from fixed to pivotal, allowing it to transition between different angular positions. This parameter change enables the connector to maintain stability during normal use while accommodating rotational movement during impact, resolving the contradiction between rigid stability and impact absorption.
2Force
If the connector is pivotally connected to allow movement, then impact forces can be absorbed, but the connector may rotate excessively causing the child to tip forward
Solution Approach 1:
The damper is pre-configured to provide resistance against rotational movement of the connector. When impact forces cause the connector to rotate, the damper activates to counteract the rotation, preventing excessive movement that would cause the child to tip forward. This preliminary anti-action ensures stability while allowing controlled movement.
Solution Approach 2:
The damper acts as an intermediary element between the pivotally connected connector and the base. It mediates the interaction between impact forces and the connector rotation, providing controlled resistance that allows necessary movement for impact absorption while preventing excessive rotation that would compromise child safety.
3Object-affected harmful factors
If a damper mechanism is added to control connector rotation, then rotation during deceleration is limited, but the device complexity increases
Solution Approach 1:
The damper is designed as a passive self-regulating mechanism that automatically activates during impact without requiring external control systems. The damper uses the rotational movement itself to generate the damping force, eliminating the need for sensors, actuators, or complex control electronics, thus limiting rotation while maintaining relatively simple device architecture.
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 balanced movement and reduces the risk of the child tipping forward, effectively buffering impact forces and maintaining safety by ensuring the seat returns to a stable position post-deceleration.
Implementation Method 1
the damper includes a torsion spring mounted between the pivot shaft and the base
Implementation Method 2
a damper configured to maintain the a connector in an initial pivotal position
Data Source
AI summary
A child safety seat includes: a base; a connector pivotally connected to the base via a pivot shaft and configured to be connected to a locking interface associated with the vehicle seat; a damper configured to maintain the connector in the initial pivotal position.