Single-Wall Child-Resistant Closure Assembly
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Solution Overview
Problem
Existing child-resistant closures are expensive and difficult for seniors to operate, while also being challenging for children to open, and they often require complex designs and additional materials.
Innovation Solution
A single-wall child-resistant closure and container assembly that is easy for seniors to open and difficult for children to open, featuring a cap with bulges and lugs that interact with the container to provide a secure locking mechanism, audible click indication, and reduced material usage, allowing for cost-effectiveness and ease of manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional two-piece squeeze and turn closures are used, then child resistance is improved, but manufacturing cost increases and device complexity increases
Solution Approach 1:
The patent combines the inner closure and outer closure into a single integrated closure structure. The single closure features an angled surface that interacts with the container rim to provide both child resistance and sealing functionality, eliminating the need for separate inner and outer closure pieces. This merging reduces manufacturing cost and simplifies the device while maintaining child-resistant properties.
2Reliability
If traditional two-piece squeeze and turn closures are used, then child resistance is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into a single closure structure. The closure includes an angled surface for child resistance, a sealing surface for sealing, and integration with the container rim, all within one piece rather than requiring separate inner and outer closures. This reduces structural complexity while maintaining child-resistant functionality.
3Ease of manufacture
If single wall closure is used, then material usage is reduced and manufacturing cost decreases, but structural strength may be compromised
Solution Approach 1:
The patent applies local quality by concentrating structural strength where needed in the single-wall closure. The angled surface and sealing surface are strategically positioned to provide maximum strength and functionality with minimal material. The single closure wall is designed with optimized thickness and geometry at critical areas to maintain structural integrity while reducing overall material usage compared to two-piece closures.
Data Source
AI summary
Child resistant closures are typically two-piece assemblies or squeeze and turn closures with an inside wall and an outside wall. The current squeeze and turn child resistant closures are expensive and difficult for seniors to operate. The preferred design is a child-resistant single wall cap and container assembly that is preferably easy for seniors to open and difficult for children to open or is substantially child-resistant. In addition, due to the single wall of the cap and relatively low cap height, the preferred assembly is light, requires less material and relatively less expensive to manufacture than prior art container assemblies. Like many child resistant closure systems, the preferred container assembly design includes a container with specifically designed neck finish to lock the closure on the container. However, the preferred design includes two small lugs, which generally do not add significantly to the bottle complexity or bottle cost.