Injection Training Device Friction Element and Audible Feedback
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Solution Overview
Problem
Existing automatic injection training devices fail to accurately simulate the resistance and feedback of real injection devices, lacking a realistic simulation of the injection process.
Innovation Solution
An automatic injection training device with a reloadable plunger assembly, energy accumulating elements, and signal generating elements that provide audible feedback signals to mimic the steps of an injection process, including frictional resistance to simulate the injection phase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a training device uses a simple plunger mechanism without resistance simulation, then the device complexity is reduced and ease of operation is improved, but the measurement precision of resistance simulation deteriorates
Solution Approach 1:
A friction element is introduced as an intermediary component between the plunger and the demo container. This friction element specifically simulates the resistance experienced during actual injection by creating controlled frictional contact with the tubular wall of the demo container, thereby achieving accurate resistance simulation without requiring complex mechanical systems
Solution Approach 2:
The patent replaces complex mechanical resistance simulation systems with a simpler friction-based mechanism. Instead of using sophisticated spring-loaded or hydraulic resistance systems, the invention uses a friction element that generates resistance through frictional contact, achieving realistic injection simulation with reduced device complexity
2Reliability
If signal generating elements are added to provide audible feedback, then the reliability of training feedback is improved, but the device complexity increases
Solution Approach 1:
Signal generating elements are integrated into the plunger assembly to provide audible feedback during the injection simulation process. These elements generate distinct sounds that correspond to specific phases of the injection, thereby improving the reliability of training feedback by allowing users to audibly confirm proper device operation and injection progress
Solution Approach 2:
The signal generating elements are merged with the existing plunger assembly structure rather than being added as separate external components. This integration approach minimizes the increase in device complexity by utilizing the existing mechanical framework of the plunger mechanism to support and activate the signal generation functionality
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 device offers a high degree of functionality and automation, providing distinct audible signals during training, enhancing the realism of the injection simulation while removing unnecessary components and actions.
Implementation Method 1
a first energy accumulating element configured to move the plunger from the first to the second position
Implementation Method 2
a friction element configured to interact with the tubular wall of the demo container such that when the plunger is released from the first position, a frictional resistive force between the friction element and the tubular wall of the demo container causes the plunger to be moved with a uniform speed and resistance simulating an injection phase of a medicament delivery
Implementation Method 3
configured to be released from the plunger when the proximal end surface of the first signal generating element impacts with the distal end surface of the demo container causing a first audible feedback signal
Implementation Method 4
the second signal generating element is fixedly connected to the proximal end of the plunger and configured to impact a distally directed surface of the elongated housing when the plunger reaches the second position causing a second audible feedback signal
Data Source
AI summary
The present invention relates to an automatic injection training device comprising an elongated housing having a distal end and an opposite proximal end and extending along a longitudinally axis (L); a tubular demo container axially and rotationally fixed relative to the elongated housing and having a tubular wall extending along the longitudinally axis (L); a reloadable plunger assembly comprising a plunger rod which is movable in the demo container between a first and a second position and a first energy accumulating element configured to move the plunger rod from the first to the second position; an actuation assembly configured to hold the plunger rod in the first position and to release the plunger rod from the first position. The invention is characterized in that the device further comprises a first signal generating element releasably connected to the plunger rod and a second signal generating element fixedly connected to the plunger rod, and wherein each signal generating element is configured to interact independently from each other for generating audible feedback signals.