Dual-Lid Bottle Assembly Segmentation for Child Safety and Elderly Access
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Solution Overview
Problem
Existing child-resistant bottle cap designs often hinder access for elderly adults due to difficulty in operation, as they may require strength or dexterity that individuals with arthritis or limited digital strength cannot provide, and may cause discomfort or accidental lid removal.
Innovation Solution
A bottle assembly with a dual-lid system where the inner lid is independently rotatable and must align with the outer lid in specific positions to facilitate child-resistant removal, featuring handle pieces, tabs, and visual/tactile aids for alignment, eliminating the need for complex threading or ratcheting mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If push-down-and-rotate lids are used for child-resistant features, then child safety is improved, but ease of operation for elderly persons with arthritis or limited digital strength deteriorates
Solution Approach 1:
The lid assembly is divided into two separate lids: an outer lid and an inner lid. The outer lid provides child-resistant features through its engagement with the container, while the inner lid can be independently rotated and removed. This segmentation allows the child-resistant function to be separated from the easy-access function, enabling elderly persons to easily remove the inner lid without needing to operate complex push-down-and-rotate mechanisms.
2Reliability
If hard press-off lids are used for child-resistant features, then child safety is improved, but comfort for users with limited digital strength deteriorates and accidental lid removal may occur
Solution Approach 1:
The lid assembly is divided into an outer lid and an inner lid. The outer lid remains engaged with the container to provide child-resistant protection, while the inner lid can be independently removed by simply pulling it off. This eliminates the need for hard pressing actions that cause discomfort or accidental removal, as the inner lid can be easily grasped and removed by persons with limited digital strength.
3Reliability
If squeezable tabs are used for child-resistant features, then child safety is improved, but ease of operation for persons with limited digital strength deteriorates
Solution Approach 1:
The lid assembly is segmented into an outer lid and an inner lid. The outer lid provides child-resistant features through its engagement mechanism, while the inner lid can be independently removed by simply grasping and pulling it off. This eliminates the need for squeezing tabs that require significant digital strength, making the system accessible to elderly persons with limited hand strength.
4Reliability
If complex threading or ratcheting mechanisms are used for child-resistant features, then child safety is improved, but device complexity increases
Solution Approach 1:
The lid assembly is divided into two simple lids: an outer lid and an inner lid. The outer lid engages with the container to provide child-resistant features through a simple engagement mechanism, while the inner lid can be independently removed. This segmentation avoids the need for complex threading or ratcheting mechanisms, reducing device complexity while maintaining child safety.
Solution Approach 2:
The child-resistant function is extracted from the lid removal mechanism. The outer lid provides child-resistant protection through its engagement with the container, while the inner lid can be easily removed without requiring complex operations. This extraction separates the safety function from the access function, simplifying the overall device complexity.
Data Source
AI summary
A bottle assembly is disclosed having a container component and a lid assembly. The lid assembly includes an outer lid and an inner lid that are aligned with each other and with a rim section of the bottle assembly in order to be removed. The bottle assembly advantageously provides that no complex threading, ratcheting mechanism or push tabs are required to provide locking functionality while still providing beneficial child-resistant safety features.