Child Resistant Cap Ring Gap Lock Mechanism
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Solution Overview
Problem
Existing child-resistant caps for containers do not adequately ensure safety, as they can be easily opened by children despite design features intended to prevent access, and often require significant strength for adult use, which can lead to accidental openings.
Innovation Solution
A child-resistant cap with a safety ring and ring gap lock system that requires two distinct steps for removal: alignment of specific indicia and release of the gap lock, ensuring the cap cannot be removed unless both conditions are met, utilizing an outer ring unit with a cut-out gap and moveable ring gap lock, and an overcap with protrusions that align with the gap only when the lock is in the release position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional child-resistant cap designs are used, then some safety protection is provided, but children can still easily open them
Solution Approach 1:
The cap is divided into multiple functional components: an outer ring unit with a safety ring, a movable gap lock mechanism, and an overcap with protrusions. Each component serves a specific function in the safety system, creating a segmented approach to child resistance that maintains adult ease of use while preventing child access.
Solution Approach 2:
The gap lock is designed to be movable between a locked position (blocking the cut-out gap) and a release position (opening the gap). This dynamic element allows the cap to transition from a secured state that prevents opening to an unlocked state that allows easy removal, resolving the contradiction between safety and ease of operation.
2Reliability
If stronger locking mechanisms are used to prevent child access, then safety is improved, but significant strength is required for adult use
Solution Approach 1:
The gap lock acts as an intermediary mechanism between the secure closed state and the open state. Instead of requiring direct force to overcome a strong lock, the gap lock provides a controlled release mechanism that allows adults to easily open the cap by manipulating the lock, thereby reducing the force required while maintaining child resistance.
Solution Approach 2:
The alignment indicia system provides visual guidance to users, allowing them to self-correct their orientation and alignment without requiring excessive force. The design inherently guides adult users through the opening process, reducing the need for significant strength while maintaining security against children who cannot perform the alignment and release sequence.
3Reliability
If multiple safety steps are required for cap removal, then child safety is enhanced, but device complexity increases
Solution Approach 1:
Multiple safety functions are merged into a compact integrated design. The outer ring unit, safety ring, gap lock, and overcap with protrusions work together as a unified system rather than separate components. This merging achieves enhanced child safety through multiple steps while minimizing the increase in perceived device complexity through cohesive integration.
Solution Approach 2:
The outer ring unit serves multiple functions: it provides the structural base, contains the safety ring for additional security, houses the gap lock mechanism, and features alignment indicia for user guidance. This multi-functionality reduces the need for separate components, thereby enhancing safety without proportionally increasing device complexity.
Data Source
AI summary
A child resistant cap includes: (a) a main closure base; (b) an outer ring unit that functions as a safety collar; (c) a dispensing mechanism on the base; (d) an overcap. The base attaches to a top dispensing container and the horizontally rotatable ring unit is attached to the base. Alternatively, the outer ring unit is fixedly attached to the container. The overcap has protrusions and the ring has corresponding cut outs. There is a ring cut out gap lock that prevents at least one protrusion from passing through a cut out gap, unless it is moved to a release position after alignment of the ring unit and overcap.