Child-Resistant Canister Lock Tab Mechanism
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Solution Overview
Problem
Existing child-resistant canisters are not effective in preventing unauthorized access by children due to ease of removal of the closure mechanism, which can be inadvertently or intentionally disengaged.
Innovation Solution
A child-resistant canister design featuring a closure-release control mechanism with a lock tab and tab controller that blocks radially outward movement of the lock tab, utilizing a lock-tab receiver channel, stationary blocker, and tab-motion limiter strip to retain the closure in a locked position, requiring adult-specific squeezing forces to disengage and rotate the closure for removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple closure mechanism is used, then ease of operation is improved, but child-resistant security deteriorates
Solution Approach 1:
The closure mechanism transitions from a static locked state to a dynamic unlocked state through application of specific forces. The lock tab can move between locked and unlocked positions, and the closure can rotate from closed to open position when proper forces are applied, making the system dynamic rather than static.
Solution Approach 2:
The mechanism changes physical parameters such as force magnitude and direction to transition between states. Adult users apply squeezing forces exceeding threshold values to disengage the lock tab and rotate the closure, while smaller child forces cannot overcome the blocking forces, thus using parameter thresholds to differentiate between authorized and unauthorized access.
2Reliability
If a complex child-resistant mechanism is used, then child-resistant security is improved, but ease of operation deteriorates
Solution Approach 1:
The closure mechanism is self-latching through the interaction between the lock tab and tab controller. Once closed, the closure automatically engages the lock tab with the tab controller, creating a self-locked state without requiring additional components or complex mechanisms. The system serves itself by maintaining the locked state through its own structural features.
Solution Approach 2:
The closure mechanism is divided into distinct functional segments: the closure body, the lock tab, the tab controller with blocking feature, and the rotation path definition feature. Each segment performs a specific function, and their coordinated interaction achieves child-resistant security while maintaining operational simplicity.
3Ease of operation
If the closure can be easily removed, then ease of operation is improved, but unauthorized access increases
Solution Approach 1:
The tab controller includes a blocking feature that preemptively prevents unauthorized removal by blocking the lock tab's movement path. Before a child can remove the closure, the blocking feature is already in place to stop the lock tab, preventing the harmful action of unauthorized access before it can occur.
Solution Approach 2:
The lock tab acts as an intermediary element between the closure body and the tab controller. It transmits the forces applied to the closure and interacts with the blocking feature to control whether removal occurs. This intermediary mechanism allows the system to differentiate between authorized adult forces and unauthorized child forces.
Data Source
AI summary
A child-resistant canister includes a container and a closure configured to mount on the container to close an opening into an interior region formed in the container. The closure includes a lid and a lid anchor coupled to the lid. The lid anchor is configured to mate with a closure retainer included in the container to retain the closure in a mounted position on the container.