Child-Resistant Topical Drug Applicator Cap Mechanism
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Solution Overview
Problem
Current topical drug applicators for children are not effectively child-resistant while remaining adult-friendly, and existing solutions for topical pharmaceutical compositions often require cumbersome glove use to prevent unwanted application.
Innovation Solution
A child-resistant topical drug applicator featuring a container with a connector and sponge applicator, coupled with a cap that has a locked and unlocked position, utilizing protruding members and notches for secure closure and indicators for easy alignment, allowing adult access while preventing children from opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a child-resistant cap with locked position is used, then child safety is improved, but device complexity increases
Solution Approach 1:
The cap mechanism is segmented into distinct functional components: protruding members on the cap, corresponding notches on the rim, and indicator elements. This segmentation allows each component to perform a specific function (locking, unlocking, indicating) while maintaining overall system simplicity and ease of manufacturing.
Solution Approach 2:
The indicator elements are nested within the cap structure, with the first indicator on the cap body and the second indicator on the rim, creating a compact integrated design that provides child resistance without adding external complexity.
2Reliability
If protruding members and notches are used for locking, then child resistance is improved, but ease of operation deteriorates
Solution Approach 1:
The indicator elements provide visual feedback to the user about the cap's state (locked or unlocked). The first indicator on the cap and second indicator on the rim align or misalign to clearly indicate whether the protruding members are engaged with the notches, eliminating guesswork and simplifying operation for adults while maintaining child resistance.
Solution Approach 2:
The cap mechanism is designed to be self-indicating through the aligned indicators, eliminating the need for additional instructions or complex operation sequences. The visual feedback system serves itself by automatically communicating the lock state to the user.
3Reliability
If multiple protruding members are used, then child resistance is improved, but device complexity increases
Solution Approach 1:
The locking function is segmented across multiple protruding members distributed around the cap's inner surface, each corresponding to notches on the rim. This segmentation provides redundant child resistance through multiple locking points while using simple, identical components that are easy to manufacture and assemble.
Solution Approach 2:
All protruding members are designed with identical structure and function, creating a homogeneous set of components. This homogeneity simplifies manufacturing and assembly while providing consistent child resistance across multiple engagement points around the cap.
Data Source
AI summary
Described herein is a child-resistant topical drug applicator and methods of applying a topical pharmaceutical composition to a surface. In one aspect, the child-resistant topical drug applicator comprises a container comprising a connector and a tube configured to contain a topical pharmaceutical composition, a sponge applicator fluidly coupled to the connector, and a child-resistant cap that reversibly couples to the connector and encloses the sponge applicator, the cap having a locked position and an unlocked position. Also described herein are methods of opening and using the child-resistant topical drug applicator.