Child-Resistant Vial Closure with Movable Locking Tab
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Solution Overview
Problem
Current child-resistant packaging for medical products often fails to effectively prevent unwanted opening by children, as they can be easily manipulated despite requiring multiple actions to remove the closure from the vial.
Innovation Solution
A child-resistant package design featuring a closure-release control mechanism with a movable release element and rotation-blocking stops, where the closure can only be released upon application of a radially inward force, ensuring the closure remains secured until intentionally removed by an adult.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closure is designed to require multiple actions to remove it from the vial, then child resistance is improved, but the ease of operation deteriorates
Solution Approach 1:
The locking tab is designed as a movable component that dynamically changes position based on the state of the release element. When the release element is not actuated, the locking tab engages with the rotation-blocking stop to prevent removal. When the release element is pushed, the locking tab moves to disengage from the stop, allowing closure removal. This dynamic mechanism resolves the contradiction by providing automatic state transition between locked and unlocked states.
Solution Approach 2:
The locking tab serves as an intermediary component between the release element and the rotation-blocking stop. It translates the linear movement of the release element into the necessary engagement/disengagement action with the stop. This intermediary mechanism allows the system to maintain child resistance through the stop while enabling easy operation through the release element's simple push motion.
2Reliability
If a locking mechanism is added to prevent unwanted opening, then child resistance is improved, but the device complexity increases
Solution Approach 1:
The locking tab is integrated directly into the closure structure, merging the locking function with the closure body. The release element is coupled to the vial, merging the release mechanism with the container. This integration reduces the number of separate components and simplifies the overall device while maintaining the child-resistant locking functionality through the interaction between the locking tab and rotation-blocking stop.
Solution Approach 2:
The locking tab automatically engages with the rotation-blocking stop when the closure is assembled, providing self-locking functionality without requiring additional components or complex control systems. The mechanism uses the natural movement and positioning of components during assembly to create the locked state, eliminating the need for external locking devices or complex actuation systems.
Data Source
AI summary
A child-resistant package includes a vial and a closure configured to mount on the vial to cover a mouth opening into a product-storage chamber of the vial. A child-resistant feature cooperates with the closure and the vial to prevent unwanted removal of the closure from the vial.