Foldable Child Car Seat Top Tether Strap Control
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Solution Overview
Problem
Existing foldable child car seats face challenges in meeting safety requirements, particularly with the installation of the 'top-tether' strap, which is often not used or not tightened correctly, leading to potential hazards during impacts or decelerations.
Innovation Solution
A foldable child car seat design that incorporates a 'top tether' strap with integrated control mechanisms ensuring the strap is deployed to a minimum length and tightened to a predetermined threshold, using the seat's foldable nature to enforce correct installation, either through a ratchet system or blocking mechanism, preventing the seat from unfolding unless safety criteria are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a top-tether strap is added to ensure safety compliance, then safety reliability is improved, but device complexity and weight increase
Solution Approach 1:
The patent combines the top-tether strap installation control with the seat folding mechanism. The strap must be installed and tensioned before the seat can be unfolded from its compact position to its operational position. This merging of safety function with the existing foldable structure adds reliability without requiring a completely separate control system.
Solution Approach 2:
The patent requires the top-tether strap to be installed and properly tensioned before the seat can be unfolded into its operational position. This preliminary action ensures safety compliance is achieved before the seat becomes usable, preventing unsafe configurations.
2Reliability
If a top-tether strap with reinforced anchoring zone is added, then safety reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The patent employs a self-checking mechanism where the seat structure itself verifies the correct installation of the top-tether strap. The reinforced anchoring zone is designed to automatically engage and lock when the strap is properly installed and tensioned, eliminating the need for separate verification steps or complex adjustment procedures by the user.
3Reliability
If control mechanisms are added to verify strap installation, then safety reliability is improved, but device complexity increases
Solution Approach 1:
The patent integrates the control mechanism for verifying strap installation directly into the seat folding mechanism. The same mechanical structure that enables the seat to fold compactly also serves to verify and enforce correct top-tether strap installation, eliminating the need for separate control systems.
Solution Approach 2:
The seat structure performs multiple functions: it provides the folding mechanism for compact storage, supports the child seat, and simultaneously verifies the correct installation of the top-tether strap. This multi-functionality reduces overall device complexity while maintaining safety reliability.
4Reliability
If the seat structure is reinforced for strap anchoring, then safety reliability is improved, but weight increases
Solution Approach 1:
The patent applies reinforced anchoring zones only at specific locations where the top-tether strap needs to be secured, rather than reinforcing the entire seat structure. This localized reinforcement provides the necessary safety reliability while minimizing the increase in overall weight.
Data Source
AI summary
The present disclosure relates to a child car seat this is tethered to an anchor point in a vehicle. The child car seat includes a seat bottom and a foldable seat back.