Child-Resistant Closure With Pointer Alignment
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Solution Overview
Problem
Current child-resistant packaging is either too difficult for adults to open or not economical to manufacture, and there is a need for a reusable and simpler design that effectively prevents children from accessing hazardous substances while allowing easy access for adults.
Innovation Solution
A child-resistant container and closure system featuring a cylindrical neck with lug threads and a closure with male threads that require alignment of specific pointers for secure engagement and disengagement, allowing easy opening by adults with minimal force once aligned, while being difficult for children to open.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional child-resistant packaging is designed to be difficult for children to open, then child safety is improved, but it becomes difficult for adults to open and operation complexity increases
Solution Approach 1:
The closure system employs asymmetric pointer alignment requirements where the first upper pointer on the closure must align with the first lower pointer on the container, and the second upper pointer must align with the second lower pointer. This asymmetric configuration creates a specific rotational position that is intuitive for adults to discover and align, while presenting an unsolvable puzzle for children who cannot understand the alignment requirement. The asymmetric design resolves the contradiction by making the opening mechanism both child-resistant and adult-friendly.
Solution Approach 2:
The closure is divided into multiple functional segments including a first closure portion with a first upper pointer, a second closure portion with a second upper pointer, and corresponding lower pointers on the container. The segmentation allows each pointer pair to independently contribute to the child-resistant mechanism while maintaining overall system functionality. This segmentation enables the complex alignment requirement to be broken down into manageable visual cues that adults can follow, while children remain unable to open it.
2Reliability
If complex child-resistant mechanisms are implemented, then child safety is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The pointer structures serve multiple functions simultaneously: they provide visual alignment cues for adults, create the child-resistant barrier, and indicate proper rotational positioning. The same pointer elements that guide adult operation also constitute the entire child-resistant mechanism, eliminating the need for separate complex locking mechanisms, springs, or cam systems. This multi-functionality resolves the contradiction by achieving high child safety through a relatively simple construction.
Solution Approach 2:
The pointer alignment system is self-explanatory and self-regulating. The visual alignment of pointers with the opening aperture automatically guides the user through the correct rotational position without requiring additional instructions, mechanisms, or components. The system serves itself by using the same structural elements for both guidance and security functions, reducing overall device complexity while maintaining effective child resistance.
Data Source
AI summary
A child-resistant container and closure, the container has a cylindrical neck, and an outer surface of the neck has three lug threads that consecutively run along the circumference of the neck. A pointer pointing upwards is present just below the neck. The closure has a central section and a skirt, the skirt has three male threads, wherein the three male threads can engage with the three lug threads. The outer surface of the skirt has a downward pointing pointer, wherein two pointers must be aligned for engaging and disengaging the three male threads and the three lug threads.