Motorized Injection Device Rotary Drive Precision Dosing
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Solution Overview
Problem
Conventional syringe-based drug delivery devices for medications like botulinum toxin are bulky, cumbersome, and lack precision, leading to potential uneven dosing and wastage, especially given the high cost of such medications.
Innovation Solution
A compact, programmable device with a rotary drive mechanism and motorized plunger control system that allows for precise dispensing and retrieval of fluid medication from a syringe, enabling controlled dosing and reducing waste through user-selectable and programmable dosing options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional syringes are used for medication delivery, then the device is simple in structure, but the dosing precision is poor and the device is bulky
Solution Approach 1:
The patent replaces manual mechanical syringe operation with an automated motor-driven plunger system. The motor rotates a drive element that converts rotational motion to linear plunger movement, providing precise control over medication delivery volume and speed, thereby improving dosing precision while automating the mechanical system.
Solution Approach 2:
The device incorporates a sensor system that automatically detects plunger position and provides feedback to the control system. This self-monitoring capability enables the device to automatically adjust and maintain precise dosing without requiring manual measurement or intervention, improving dosing precision while reducing operational complexity.
2Measurement precision
If conventional syringes are used for medication delivery, then the device is easy to operate, but the dosing accuracy relies on clinician practice and leads to uneven dosing
Solution Approach 1:
The patent incorporates a sensor system that continuously monitors plunger position and provides real-time feedback to the control system. This feedback mechanism enables automatic adjustment of plunger movement to achieve precise, reproducible dosing volumes, eliminating the need for clinician practice and ensuring consistent dosing accuracy while simplifying operation.
Solution Approach 2:
The patent replaces manual clinician control with an automated motor-driven system that precisely controls plunger movement. The motor rotates a drive element at controlled speeds and for precise durations, automatically achieving accurate dosing without requiring clinician skill or practice, thereby improving dosing accuracy while maintaining ease of operation.
3Ease of operation
If conventional syringes are used for medication delivery, then the device structure is simple, but the device is bulky and cumbersome to use
Solution Approach 1:
The patent employs a nested structure where the syringe is positioned within the device housing, and the drive mechanism components are arranged in concentric or layered configurations. The motor, drive element, and sensor system are integrated in a compact nested arrangement that minimizes overall device footprint while maintaining all necessary functional components, making the device portable and easy to use.
Solution Approach 2:
The patent uses a rotary drive mechanism that converts rotational motion (one dimension) into linear plunger movement (another dimension). This dimensional transformation allows compact packaging of the drive system while maintaining effective linear actuation of the plunger, reducing device bulk while preserving functionality and ease of use.
4Measurement precision
If conventional syringes are used for medication delivery, then the device has no moving parts, but the dosing precision is poor and leads to medication waste
Solution Approach 1:
The patent replaces manual syringe operation with a motor-driven plunger system that rotates a drive element to precisely control plunger movement. This automated mechanical system provides precise control over medication delivery volume through controlled rotation duration and speed, achieving accurate dosing while incorporating minimal necessary moving parts (motor, drive element, plunger).
Solution Approach 2:
The patent incorporates sensors that detect plunger position and provide feedback to the control system. This feedback mechanism enables the device to automatically verify and adjust dosing volume, ensuring precise medication delivery and preventing waste. The feedback system adds minimal complexity while dramatically improving dosing precision through automatic monitoring and correction.
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 provides accurate, efficient, and cost-effective administration of medication by ensuring precise dosing and minimizing waste, enhancing user convenience and reducing the risk of facial asymmetry during botulinum toxin injections.
Implementation Method 1
a rotary drive attached to the housing to contact a side of the plunger, the housing to press the rotary drive into the side of the plunger between the syringe flange and an end of the plunger
Implementation Method 2
a rotary drive coupled to a motor attached to the housing
Implementation Method 3
a cutter gear attached to the housing to contact a side of the plunger, the cutter gear having a plurality of teeth and an axis of rotation orthogonal to the linear axis of the syringe
Data Source
AI summary
A device for dispensing a controlled amount of a fluid from a syringe, the syringe having a plunger extending along a linear axis through a syringe flange and into a syringe barrel. The device includes a housing to accommodate at least a portion of the syringe, and a drive wheel attached to the housing to contact a side of the plunger, the housing to press the drive wheel into the side of the plunger between the syringe flange and an end of the plunger.