Child Safety Seat Latch Mechanism for Robust Attachment
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Solution Overview
Problem
Current child safety seat attachment mechanisms are complex and inconvenient to operate, failing to balance robustness against ease of use and manufacturing costs.
Innovation Solution
A child safety seat assembly featuring a support base with a shell body and a child carrier that uses latches and a release arm mechanism for secure attachment and easy detachment, allowing for multiple attachment points with a stroller or vehicle base, utilizing springs and ramp surfaces to facilitate locking and unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If robust attachment structures are provided to resist crash forces, then safety reliability is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The attachment mechanism is divided into separate functional components: a latch assembly with latch finger and latch body, a release button, and a base structure. This segmentation allows each component to be optimized independently for its specific function while maintaining overall robustness.
Solution Approach 2:
The release button is extracted as a separate, easily accessible component that can be operated independently to trigger the release mechanism. This extraction simplifies the user interaction while maintaining the robustness of the underlying latch structure.
2Reliability
If robust attachment structures are provided to resist crash forces, then safety reliability is improved, but ease of operation worsens
Solution Approach 1:
The release button acts as an intermediary component that translates simple user pressure into the complex sequence of movements required to disengage the latch. This intermediary mechanism allows easy operation while maintaining robust attachment during normal use.
Solution Approach 2:
The latch finger is designed to be movable, transitioning between engaged and disengaged states. The dynamic nature of the latch finger allows it to remain securely locked during normal operation but can be easily released when the button is pressed, balancing robustness with ease of operation.
3Reliability
If complex attachment mechanisms are used to ensure robustness, then attachment reliability is improved, but manufacturing cost worsens
Solution Approach 1:
Multiple functions are merged into the latch assembly: the latch finger provides both the locking function and the visual indication function, while the latch body integrates the pivot point and engagement surface. This merging reduces the total number of separate components while maintaining reliable attachment.
Solution Approach 2:
The latch assembly is designed to perform multiple functions: securing the carrier to the base, providing visual feedback through the latch finger position, and enabling easy release through the button mechanism. This multi-functionality reduces overall system complexity and manufacturing cost.
Data Source
AI summary
A child safety seat assembly includes a support base, and a child carrier operable to detachably assemble with the support base. The support base has a shell body that defines a receiving area and includes an upright surface raising upward from a bottom surface, the shell body being assembled with a latch located adjacent to the upright surface. The child carrier includes a seat shell having a foot portion protruding downward, the foot portion having an interior in which are assembled a release arm and a fixed rod. The foot portion is placed on the bottom surface in the receiving area and the latch engages with the rod when the child carrier is locked with the support base, and the release arm is operable to push the latch to disengage from the rod for removal of the child carrier from the support base.