Injection Training Device Viscous Fluid Rotor Damping
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Solution Overview
Problem
Existing injection devices face challenges in simulating the tactile sensations and resistance encountered when delivering high-viscosity medications, particularly for users lacking experience in administering such injections.
Innovation Solution
An injection training device featuring a barrel, plunger, and a damper assembly with a viscous fluid chamber that provides resistance to plunger depression, mimicking the force and time required to deliver high-viscosity medications, using a rotor and damper housing system to simulate the injection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a plunger is quickly depressed to deliver full dosage, then injection time is reduced, but the user cannot experience the resistance of high-viscosity medications
Solution Approach 1:
A viscous fluid is introduced as an intermediary substance between the plunger and the medication, simulating the resistance characteristics of high-viscosity medications. The fluid is contained in a chamber with specific viscosity properties that replicate the tactile feedback users would encounter during actual injection, allowing realistic practice without the constraints of actual medication delivery time
Solution Approach 2:
The viscosity parameter of the fluid in the chamber is specifically selected to match the resistance characteristics of high-viscosity medications. By controlling the viscosity parameter of the simulation fluid, the device accurately replicates the force resistance users would experience during actual injection of viscous medications, enabling realistic tactile feedback training
2Ease of operation
If the injection process is designed to occur over a longer time duration, then the user experiences resistance to plunger depression, but the injection time increases
Solution Approach 1:
The injection training device segments the injection process into two distinct parts: a simulation chamber that provides resistance feedback and a delivery mechanism. This segmentation allows the training function (experiencing resistance) to be separated from the actual medication delivery, enabling users to practice the tactile aspects without the time constraints of full dosage administration
3Reliability
If a training device simulates high-viscosity resistance, then training effectiveness is improved, but device complexity increases
Solution Approach 1:
The device creates a simplified copy of the actual injection system by replicating only the essential resistance characteristics using a viscous fluid in a chamber, rather than attempting to fully replicate the complex medication delivery system. This copying approach maintains training effectiveness by preserving the key tactile feedback while avoiding unnecessary complexity
Solution Approach 2:
Instead of replicating the entire medication delivery system, the invention changes the parameter of the simulation fluid to match the viscosity characteristics of high-viscosity medications. This parameter-based approach achieves realistic training效果的 with a simpler device structure, as it focuses on reproducing the critical resistance property rather than the entire system
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 effectively simulates the resistance and time duration of delivering high-viscosity medications, allowing users to practice with tactile feedback and improve their injection skills.
Implementation Method 1
The viscous fluid resists rotation of the rotor about the axis with respect to the damper housing
Implementation Method 2
depressing a plunger in a distal direction with respect to a barrel, thereby causing the plunger to apply a force to a rotor that drives the rotor to travel in the distal direction
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
An injection training device is configured to simulate the tactile sensations and forces associated with the operation of a corresponding injection device. However, the injection training device does not carry the medication or a needle. The injection training device includes a plunger that is depressed to drive a rotor to rotate. A viscous fluid resists rotation of the rotor, which thereby resists depression of the plunger.