Swiveling Child Restraint Seat With Secure Seat-Back Locking
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Solution Overview
Problem
Existing child restraints lack a reliable mechanism to securely transition between different seating positions, such as left-facing, forward-facing, and right-facing configurations, which can lead to misalignment and instability during swiveling, compromising safety and ease of use.
Innovation Solution
A child restraint system featuring a swiveling juvenile seat with a seat-back lock and stationary seat anchor that utilize guide channels and pivotable hook-retainer latches to ensure secure locking in the forward-facing position, while allowing easy conversion between seating orientations using a hook-release controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a swiveling mechanism is provided to allow transition between seating positions, then adaptability and ease of operation are improved, but reliability and stability deteriorate due to potential misalignment and unintended rotation
Solution Approach 1:
A seat-back lock with a hook and stationary seat anchor acts as an intermediary mechanism between the swiveling juvenile seat and the base. The hook engages with the seat anchor to provide a positive locking action that prevents unintended rotation while allowing controlled transitions between seating positions when the hook is deliberately disengaged.
Solution Approach 2:
The swiveling mechanism incorporates automatic alignment features where the guide channel and hook-retainer latch system automatically guide and align the hook with the seat anchor during the swiveling motion, eliminating the need for manual alignment and ensuring reliable engagement without user intervention.
2Reliability
If a locking mechanism is added to secure the juvenile seat in position, then reliability and stability are improved, but device complexity increases
Solution Approach 1:
The locking mechanism is segmented into distinct functional components: a hook-retainer latch system that holds the hook in place, a hook that engages with the seat anchor, and a hook-release controller that operates a linkage to disengage the hook. This segmentation allows each component to perform its specific function simply and reliably without requiring a complex integrated mechanism.
Solution Approach 2:
The locking function is extracted as a separate, independent mechanism (seat-back lock) that can operate autonomously from the swiveling mechanism. The hook-release controller is also extracted as a separate user interface component, allowing the locking mechanism to be simple and reliable while still providing user control capability.
3Ease of operation
If guide channels are used to align the seat anchor during swiveling, then ease of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The guide channel geometry is designed with specific angular parameters that match the swiveling arc of the juvenile seat. By carefully selecting and maintaining these angular parameters during manufacturing, the guide channel provides automatic alignment functionality without requiring extremely tight tolerances, thus balancing ease of operation with reasonable manufacturing precision requirements.
Data Source
AI summary
A child restraint includes a seat support and a juvenile seat mounted to swivel about an axis on the seat support. The seat support is adapted to set on a vehicle seat.