Closure System with Intermediate Body for Child-Resistant Dispenser
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Solution Overview
Problem
Current Child Resistant Container (CRC) closure systems fail to allow easy separation of the dispenser head from the container for refilling or replacing, often requiring excessive user effort and not meeting safety standards for dual movement requirements.
Innovation Solution
A closure system featuring an intermediate body with snap-action coupling and interference mechanisms between the dispenser head, intermediate body, and container, which requires a specific rotational action to separate, ensuring secure attachment and preventing accidental unscrewing, while allowing intentional detachment for refilling or replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple screwing mechanism is used for attaching the dispenser head to the container, then the ease of operation is improved, but the child resistance and security are worsened
Solution Approach 1:
The closure system is divided into separate functional components: an intermediate body with threading for secure attachment, and a dispenser head with a release mechanism. This segmentation allows each component to perform its specific function optimally - the intermediate body provides secure attachment while the dispenser head enables controlled separation through the release mechanism.
Solution Approach 2:
An intermediate body is introduced between the container and the dispenser head. This intermediate body carries the threading for attachment to the container and provides a interface with the dispenser head that includes the release mechanism. The intermediate body acts as a mediator that enables both secure attachment and controlled separation.
2Reliability
If a dual movement mechanism is implemented for CRC compliance, then the child resistance is improved, but the ease of operation and separation difficulty are worsened
Solution Approach 1:
The closure system transitions from a static screwed connection to a dynamic system with a release mechanism. The intermediate body can rotate on the container (first movement) and the dispenser head can be detached through a specific rotational action on the intermediate body (second movement). This dynamic design enables CRC compliance while maintaining ease of separation when needed.
Solution Approach 2:
The system changes the operational parameters by introducing a specific rotational action requirement for separation. Instead of requiring forceful unscrewing, the system requires a specific rotational movement on the intermediate body to engage the release mechanism, which then allows easy separation. This parameter change makes the system child-resistant while maintaining ease of operation for authorized users.
3Reliability
If the dispenser head is made firmly fixed to prevent accidental separation, then the reliability is improved, but the adaptability for refilling and replacement is worsened
Solution Approach 1:
The release mechanism is pre-configured within the intermediate body and dispenser head assembly. The rotational action required for separation is designed to engage the release mechanism in advance, allowing the dispenser head to be easily detached when needed. This preliminary configuration of the release mechanism ensures both secure attachment during use and ease of separation for refilling or replacement.
Data Source
AI summary
A closure for a liquid container is provided between the container and a liquid dispenser head. The closure includes an intermediate body between the dispenser head and the container. The dispenser head can be rotated with respect to the container, without unscrewing the closure, except when the intermediate body is manually prevented from rotating.