Audible Injection Progress Indicator via Mechanical Ratchet
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Solution Overview
Problem
Automatic medication injection devices often lack clear audible feedback, leading to user uncertainty about the injection process, especially during long or high-volume doses, which can result in misuse or incorrect interpretation of device functionality.
Innovation Solution
An automatic medication injection device with an audible indicator featuring a changing cadence to signal the approaching end of the dose, utilizing a mechanical drive mechanism with sound elements and actuating elements that produce a sequence of clicks with varying time intervals to inform the user of injection progress and completion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an automatic medication injection device is used, then the injection process is automated and does not require manual control of injection speed, but users lack clear audible feedback about injection progress, leading to user uncertainty
Solution Approach 1:
The patent implements an audible feedback mechanism using a series of clicks generated by a ratchet mechanism during the injection process. These clicks provide real-time information to the user about injection progress, resolving the information loss caused by automation. The feedback is designed to be intuitive and does not require electronic components.
Solution Approach 2:
The patent replaces electronic feedback systems with a purely mechanical ratchet mechanism that generates audible clicks. This mechanical substitution provides reliable feedback without requiring batteries, circuits, or electronic components, while still solving the information feedback problem created by automation.
2Loss of information
If electronic audible indicators are used to provide injection progress information, then user understanding of injection status is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex electronic audible indicators with a simple mechanical ratchet mechanism. The ratchet engages with a toothed surface during injection, producing audible clicks that indicate progress. This mechanical solution reduces device complexity, eliminates electronic components, and lowers cost while providing the necessary information feedback.
Solution Approach 2:
The ratchet mechanism is self-actuating and integrates with the existing injection mechanism. It automatically generates feedback clicks during the injection process without requiring separate power sources, control circuits, or electronic components, thereby reducing overall device complexity.
3Device complexity
If a simple mechanical injection device is used, then device cost is reduced, but users cannot distinguish between click stoppage due to completion versus device malfunction
Solution Approach 1:
The patent uses periodic audible clicks generated by the ratchet mechanism during injection. The regular, predictable pattern of clicks provides users with a clear expectation of what normal operation sounds like. When clicks stop, users can confidently interpret this as completion rather than malfunction, because they understand the periodic pattern should continue throughout the injection process.
Solution Approach 2:
The mechanical ratchet provides continuous audible feedback throughout the injection process, creating a clear signal pattern that helps users distinguish between normal operation and device malfunction. The feedback is designed to be consistent and predictable, enhancing user confidence in interpreting device status.
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
Provides clear and intuitive audible feedback to users, ensuring they understand the injection process and its completion, reducing uncertainty and improving user confidence and safety.
Implementation Method 1
an audible indicator featuring a changing cadence to signal the approaching end of the dose, utilizing a mechanical drive mechanism with sound elements and actuating elements that produce a sequence of clicks with varying time intervals
Data Source
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AI summary
An automatic medication injection device that provides a user with audible notice of injecting progress. The device in one form includes a plurality of sound elements located on drive mechanism portion that inserts within a barrel of a container of medication to advance a sealing plunger of that container. The device also includes at least one actuating element movable axially with the container of medication within the device housing, which at least one actuating is element arranged to engage the plurality of sound elements to generate audible notices as the advancing portion moves past the at least one actuating element when advancing the sealing plunger for an injection.