Screw Cap Contact Lens Package Rupture Seal
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Solution Overview
Problem
Conventional contact lens packaging in blister packs does not consistently provide easy access to the lenses, making it difficult for users to retrieve them efficiently.
Innovation Solution
A screw cap package design featuring a holder with a receptacle and a movable screw cap that ruptures a breakable seal to expose the contact lens, allowing easy access by rotating the cap relative to the holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional blister pack is used for contact lens packaging, then the package structure is simple and easy to manufacture, but the accessibility to the contact lens is poor and difficult to open consistently
Solution Approach 1:
The package is divided into distinct functional segments: a holder body containing the receptacle, a separate movable cap with sealing functionality, and a breakable seal layer. This segmentation allows the cap to be independently manipulated for easy opening while maintaining overall structural integrity and manufacturability.
Solution Approach 2:
The cap is designed to be movable relative to the holder, transitioning from a closed position (sealing the receptacle) to an open position (exposing the contact lens). This dynamic element enables consistent and easy accessibility while maintaining a simple overall package structure that remains easy to manufacture.
2Ease of operation
If a movable cap with breakable seal is implemented, then accessibility to the contact lens is improved, but the device complexity increases
Solution Approach 1:
A breakable seal is pre-positioned between the cap and the holder's receptacle. This preliminary sealing action ensures that the package remains hermetically sealed during storage and shipping, while the breakable nature of the seal allows for easy opening without requiring complex mechanisms. The seal does the work of securing the lens, simplifying the overall mechanism.
Solution Approach 2:
The seal is designed as a disposable, breakable component that is replaced with each opening. This inexpensive, single-use element provides reliable sealing functionality without requiring complex, reusable mechanisms, thereby improving ease of opening while minimizing the increase in device complexity.
3Ease of operation
If the cap is made movable from first position to second position, then the contact lens can be easily accessed, but the sealing reliability may be compromised during movement
Solution Approach 1:
The seal is pre-positioned and configured to remain intact during cap movement. The breakable seal is designed to maintain its sealing function throughout the transition from closed to open position, only breaking when the cap reaches the fully open position. This ensures reliable sealing during storage and transport while enabling easy lens removal.
Solution Approach 2:
The seal is designed to prevent premature opening or accidental breach during cap movement. The breakable seal's structural design includes features that resist deformation and maintain integrity during the cap's transition, preventing any compromise to seal reliability until the intended opening action is completed.
Data Source
AI summary
A contact lens package includes a holder having a receptacle for holding a contact lens and a cap having a seal for sealing a contact lens within the receptacle. The cap is attached to the holder and is movable from an end of the holder where the receptacle is formed toward an opposite end of the holder. As the cap moves toward the opposite end of the holder, the end of the holder where the receptacle is formed ruptures the seal such that the contact lens can be removed from the package.