Auto-Injector Audio and Visual Indicators for Injection Completion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing automatic injection devices lack clear auditory and visual indicators to confirm the completion of the injection process, making it difficult for untrained users to ensure proper use and safe handling of the device post-use.
Innovation Solution
Incorporation of an audio indicator member that provides an audible click when transitioning from the injection to the post-use position, and a visual indicator visible through an indicator opening, ensuring user awareness of the device's status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no audio indicator is provided in automatic injection devices, then the device structure remains simple, but untrained users cannot confirm completion of the injection process
Solution Approach 1:
The audio indicator member provides auditory feedback to the user when the plunger body transitions from the injection position to the post-use position. This feedback mechanism confirms that the injection is complete, allowing users to verify proper device operation without increasing overall device complexity
Solution Approach 2:
The audio indicator member utilizes a mechanical engagement system where the indicator engages with a rib or protrusion on the housing during injection, then disengages to produce an audible click. This mechanical substitution replaces the need for complex electronic sensors or indicators while achieving reliable completion confirmation
2Reliability
If no visual indicator is provided, then the device structure remains simple, but untrained users cannot ensure proper use and safe handling post-use
Solution Approach 1:
The visual indicator member utilizes color or transparency changes to indicate device status. When the plunger body is in the post-use position, the visual indicator becomes visible through an indicator opening, allowing users to confirm proper use and safe handling status without adding complex electronic displays
3Loss of information
If the device provides only mechanical movement without indicators, then manufacturing remains simple, but users lack clear feedback on injection progress and completion
Solution Approach 1:
The audio and visual indicator members provide immediate feedback during the injection process and upon completion. The audio indicator clicks when the plunger transitions to the post-use position, while the visual indicator becomes visible, ensuring users receive complete status information without complicating manufacturing
Solution Approach 2:
The indicator members are designed to automatically activate through the existing mechanical movement of the plunger body. As the plunger naturally transitions between positions during injection, the indicators self-activate through mechanical engagement and disengagement, eliminating the need for additional actuators or power sources
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
Enhances user confidence by providing clear auditory and visual feedback, ensuring proper use and safe handling of the auto-injector, particularly for untrained users.
Implementation Method 1
an audio indicator member configured to provide an audible indication of a transition of the plunger body from the injection position to the post-use position
Data Source
AI summary
A drug delivery device includes a housing, a syringe assembly including a barrel, a stopper, and a cannula, with at least a portion of the syringe assembly positioned within the housing, and a drive assembly including a plunger body configured to move the stopper within the barrel upon actuation of the drive assembly, with at least a portion of the drive assembly positioned within the housing. The plunger body has a pre-use position prior to movement of the plunger body, an injection position where the plunger body moves the stopper within the barrel, and a post use position where movement of the plunger body has stopped. The device further includes an audio indicator member configured to provide an audible indication of a transition of the plunger body from the injection position to the post-use position.