Automatic Injection Device Sound Signal Generation Mechanism
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Solution Overview
Problem
Users of automatic injection devices struggle to determine when the injection is complete, as the device does not provide clear indication of the end of the injection process.
Innovation Solution
Incorporating a sound signal generation mechanism, utilizing elastic hook-toothing assemblies, to produce a series of sound signals from the start to the end of the injection, allowing users to recognize when the device can be removed from the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If automatic injection device is used to administer liquid medication, then injection dosing accuracy is improved, but user awareness of injection completion is worsened
Solution Approach 1:
The patent implements a feedback mechanism by generating sound signals that provide real-time information to the user about the injection progress. The sound signals are generated by the interaction between the piston control member and the toothing during the injection process, allowing the user to hear when the injection is complete without requiring complex display screens or additional sensors.
Solution Approach 2:
The patent replaces complex electronic display systems with a simple acoustic feedback mechanism. Instead of using visual displays, LEDs, or electronic indicators, the invention uses sound signals generated by the mechanical interaction between the piston control member and the toothing to communicate injection status to the user.
2Loss of information
If sound signal generation device is added to indicate injection completion, then user awareness of injection completion is improved, but device complexity is worsened
Solution Approach 1:
The toothing structure serves multiple functions: it acts as a mechanical guide for the piston control member during injection, and simultaneously serves as a sound-generating element when the piston control member interacts with it. This multi-functionality avoids the need for separate dedicated sound generation components.
Solution Approach 2:
The injection mechanism itself generates the sound signals through the natural interaction between the piston control member and the toothing during the injection process. The system uses its own operational movements to create the feedback signals, eliminating the need for external power sources, speakers, or electronic control systems.
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
Ensures users can confidently remove the device once sound signals cease, indicating the completion of the injection, enhancing user experience and accuracy.
Implementation Method 1
the device for generating sound signals comprises at least one elastic hook-toothing assembly for generating a sound signal each time the elastic hook crosses a tooth of the toothing
Data Source
AI summary
An automatic injection device includes an injection syringe for injecting liquid provided with a syringe body carrying an injection needle and a piston rod mounted to be able to move inside this syringe body to cover an injection stroke during which the liquid is injected, an external casing and a positioning control member that are telescopic, the relative movement of which controls the operation of the automatic injection device, and control members arranged to selectively control the movement of the syringe body and the movement of the piston inside the positioning control member in order to automatically inject the liquid present in the injection syringe, the automatic injection device further comprising a device for generating sound signals activated during the automatic injection of the liquid present in the injection syringe so as to generate a series of sound signals from the start to the end of the injection.