Medication Injector Near-Empty Alert Mechanism
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Solution Overview
Problem
Conventional medication injectors often fail to notify users promptly when they are running low on medication, leading to inconvenient situations where users may administer a cold injection or wait for a new pen to reach room temperature, and some designs are complex and costly to manufacture.
Innovation Solution
A medication injector with a piston rod featuring different threading portions and an alert indicator, such as a signal nut or disc, that becomes visible through a housing window when the injector approaches the end of its medication supply, allowing users to prepare for the next injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If an active-stop injector is used to prevent dialing a dose greater than remaining medication, then the user is notified of partial dose remaining, but the device becomes more complex and expensive to manufacture
Solution Approach 1:
The patent uses color changes on the dose window scale to indicate medication status. The scale transitions from green to yellow to red as medication is depleted, providing visual feedback without complex mechanical or electronic components. This resolves the contradiction by delivering information through a simple, cost-effective visual system rather than complex active-stop mechanisms.
2Loss of time
If the user waits until the injector is empty or attempts to dial a dose to become aware of remaining medication, then the injector structure remains simple, but the user experiences inconvenience and time loss
Solution Approach 1:
The patent enables users to take preliminary action by providing advance visual warnings through color changes before the medication is fully depleted. The yellow and red zones on the scale allow users to prepare a new injector in advance, avoiding the need to wait until the last moment. This resolves the time loss issue without requiring complex notification systems.
3Loss of information
If a simple scale indication is used to show remaining dose, then the device remains simple to manufacture, but the user may not perceive the near-empty status until too late
Solution Approach 1:
The patent enhances the simple scale indication by incorporating color changes (green to yellow to red) that naturally draw human attention and convey urgency. This low-cost visual enhancement ensures users perceive the near-empty status well in advance without increasing manufacturing complexity or cost significantly.
4Loss of information
If the alert indicator is always visible, then the user is continuously informed of medication status, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent uses periodic visual feedback through the dosing scale that refreshes with each dose selection and administration cycle. The color-coded scale provides information at relevant intervals (when dosing) rather than requiring continuous active monitoring or complex real-time display systems, thus maintaining simplicity while ensuring timely information delivery.
Data Source
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AI summary
A medication injector that has an alert indicator that alerts the user when the medication injector is approaching near the end of its medication supply is disclosed. The alert indicator gives the user an opportunity to make preparations to obtain additional medication for the injector if there is an insufficient amount of medication in the injector to enable the user to dispense the required dosage amount with the next injection. Initially, the alert indicator is not visible to the user, but becomes visible to the user when the injector is near empty.