Child-Resistant Closure With Dynamic Rotation Inhibitor
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Solution Overview
Problem
Current child-resistant packaging technologies often require complex and cumbersome mechanisms to prevent accidental opening by children, which can be inconvenient for adults and may not provide sufficient security against unauthorized access.
Innovation Solution
A child-resistant packaging system featuring a closure-release control mechanism with stationary rotation blockers and a multi-mode closure-rotation inhibitor, allowing the closure to shift between a rotation-blocking expanded mode and a rotation-allowing compressed mode, facilitated by an external dual-start thread system and a compliant arm with an arm-return spring, enabling secure closure installation and removal with minimal rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex child-resistant mechanism is used to prevent accidental opening, then child safety is improved, but ease of operation for adults deteriorates
Solution Approach 1:
The closure-rotation inhibitor is designed to dynamically change its configuration between an expanded rotation-blocking mode and a compressed rotation-allowing mode. This dynamic transformation enables the same mechanism to provide child-resistant protection during normal use while allowing easy opening when needed, resolving the contradiction between safety and ease of operation.
Solution Approach 2:
The mechanism utilizes parameter changes in the closure-rotation inhibitor's physical state (expanded vs. compressed configuration) to switch between protective and permissive modes. By changing the geometric parameters of the inhibitor, the system achieves both child safety and adult convenience without requiring complex separate mechanisms.
2Ease of operation
If a multi-mode closure-rotation inhibitor is used to allow controlled rotation, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The closure-rotation inhibitor combines multiple functions into a single integrated component: it acts as both a rotation blocker during normal use and a rotation enabler during opening, while also serving as a structural element of the closure assembly. This merging reduces overall device complexity by eliminating the need for separate mechanisms for each function.
Solution Approach 2:
The closure-rotation inhibitor is designed as a multi-functional element that performs rotation blocking, rotation enabling, and structural support functions. This universal design allows a single component to handle multiple operational requirements, reducing the number of separate parts needed in the closure-release control mechanism.
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 system effectively prevents accidental opening by children while allowing easy and secure closure installation and removal for adults, ensuring product safety and convenience.
Implementation Method 1
a relatively short curved arm-return spring arranged to interconnect the closure and a free end of the L-shaped compliant arm
Data Source
AI summary
A package includes a vessel and a closure. The vessel is formed to include a product-storage chamber and a mouth opening into the product-storage chamber. The closure is configured to mount on the vessel to assume an installed position closing the mouth formed in the vessel when rotated relative to the vessel about a vertical axis of rotation in a closure-installation direction.