Tamper-Evident Medication Dispenser with Resilient Locking Arms
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Solution Overview
Problem
Existing child-proof and tamper-evident medication packaging systems are inadequate in preventing unauthorized access by children and detecting tampering, as they often require simple manipulation or do not provide sufficient security against young children's access and tampering indicators.
Innovation Solution
A child-proof and tamper-evident medication dispenser design featuring a tray member with resilient locking arms and a stop tab mechanism that requires significant strength and dexterity to open, combined with a locking mechanism that provides evidence of tampering through a visible physical state, such as a removable stop tab or tamper-evident tape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If simple child-proof mechanisms like twist-off caps are used, then ease of operation is improved, but child resistance deteriorates
Solution Approach 1:
The cap is divided into multiple functional segments: a first peripheral edge with a stop tab for tamper evidence, a second peripheral edge with a tab member for user engagement, and a neck member connecting them. This segmentation allows each part to serve a specific function - the stop tab provides security evidence, the tab member enables easy gripping, and the neck member provides structural connection, collectively achieving both child resistance and ease of operation
Solution Approach 2:
Different regions of the cap have different properties optimized for their specific functions. The stop tab is designed to be breakable or removable to provide tamper evidence, the tab member has a specific shape for easy gripping by adults, and the neck member has controlled strength to break under child force but withstand adult force. This local differentiation of properties allows the cap to simultaneously provide child resistance and ease of operation for authorized users
2Difficulty of detecting and measuring
If tamper-evident packaging components are added, then detection of tampering is improved, but device complexity deteriorates
Solution Approach 1:
The tamper-evident stop tab is merged with the child-resistant cap structure itself rather than being a separate component. The stop tab is integrally formed with the neck member and peripheral edge, combining the child-proofing function and tamper-detection function into a single unified structure. This merging reduces overall packaging complexity while maintaining effective tamper detection capability
Solution Approach 2:
The stop tab serves multiple functions simultaneously: it acts as a child-resistant barrier component, a tamper-evident indicator, and a structural element of the cap assembly. This multi-functionality eliminates the need for separate tamper-evident components, thereby reducing device complexity while improving tamper detection capability
3Reliability
If strong locking mechanisms are used, then child resistance is improved, but ease of operation deteriorates
Solution Approach 1:
The cap is designed with a pre-configured weak point at the neck member that is intended to break under excessive force. This preliminary design feature allows the cap to automatically fail in a controlled manner when a child applies excessive force, while still maintaining strong locking that requires proper adult technique to open. The preliminary action of designing the controlled failure point enables the cap to distinguish between child and adult users without requiring complex mechanisms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The dispenser effectively prevents children from accessing medications by requiring adult-level strength and dexterity to open and provides a clear indication of tampering, enhancing safety and security while allowing easy loading and use by pharmacists.
Implementation Method 1
The tray member includes a plurality of resiliently flexible locking arms that extend into a complimentary plurality of apertures within the case to secure the tray member within the enclosure
Data Source
AI summary
Medication dispensers are provided that are both child-proof and tamper evident. In one embodiment, a child-proof and tamper-evident dispenser includes a tray member comprising a plurality of receptacles for receiving a pharmaceutical compound, a stop tab connected to a first peripheral edge by a neck member, and a tab member at a second peripheral edge that is opposite from the first peripheral edge. The dispenser further includes a bottom case body and a top case body configured to form an enclosure around the plurality of receptacles when brought into a substantially confronting relationship. Each of the bottom case body and the top case body include a sloped wall member having a shelf portion that surrounds the neck member when the enclosure is formed. A plurality of locking tabs engage a complimentary number of locking recesses configured to receive an end portion of the locking tabs to fix the bottom case body and the top case body in an enclosure configuration. The tray member includes a plurality of resiliently flexible locking arms that extend into a complimentary plurality of apertures within the case to secure the tray member within the enclosure.