Electromagnetic Needleless Injector With Predefined Force Profile
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Solution Overview
Problem
Existing needleless injection devices face challenges in mastering the progression of pressure over time, leading to difficulties in controlling injection parameters such as injection depth and volume.
Innovation Solution
A needleless injection device utilizing an electromagnetic actuator with a stationary structure and mobile element designed to have varying magnetic properties along the movement path, allowing for a predefined force profile without complex control circuits, using simple electric current variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a complex microcontroller control circuit is used to precisely control the pressure profile over time, then injection precision is improved, but device complexity and cost increase
Solution Approach 1:
The electromagnetic actuator is designed with built-in magnetic property variations along its stroke that automatically generate the desired force profile without requiring external control signals. The actuator serves itself by having its magnetic properties vary in the direction of movement, creating the predefined intensity force profile inherently during operation.
Solution Approach 2:
The magnetic properties of the actuator are deliberately varied as a design parameter along the direction of movement. This creates different magnetic field strengths at different positions, which automatically produces the desired force progression without needing complex electronic control. The parameter change is embedded in the physical structure of the actuator.
2Manufacturing precision
If active control of electric current intensity is implemented to control force profile, then injection parameter control is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The actuator automatically generates the correct force profile through its inherent magnetic property variations, eliminating the need for complex control circuits to actively modulate current intensity. The system serves itself by converting electrical energy to mechanical force through its designed magnetic gradient.
Solution Approach 2:
The actuator can be implemented as a simple, potentially disposable component with built-in magnetic properties, avoiding the need for expensive, complex control electronics. This aligns with the trend of using simpler, cheaper components where appropriate.
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
Enables precise control of injection force and simplifies the device design by eliminating the need for complex microcontroller circuits while maintaining precise injection parameters.
Implementation Method 1
the actuator including a stationary structure magnetically interacting with a mobile element in order to exert a force thereon during the injection
Implementation Method 2
one at least from the mobile element and from the stationary structure having, by design, magnetic properties which vary in the direction of movement of the mobile element such as to generate a predefined intensity force on the mobile element
Data Source
AI summary
A needleless injection device including a piston moved by at least one electromagnetic actuator fed with electric current, the actuator including a stationary structure magnetically interacting with a mobile element in order to exert a force thereon during the injection, one at least from the mobile element and from the stationary structure having, by design, magnetic properties which vary in the direction of movement of the mobile element such as to generate a predefined intensity force on the mobile element during the movement thereof relative to the stationary structure.