Removable Injection Pen Monitor for Accurate Dose End Detection
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Solution Overview
Problem
Existing injection monitoring systems for pen injection devices are bulky, specific to certain brands, prone to electromagnetic interference, and require complex shielding mechanisms, leading to inaccurate dose measurements.
Innovation Solution
A removably attachable injection monitoring module with a hollow main body that co-rotates with the dose setting wheel, incorporating magnetic field producing means and a clutch assembly to detect injection end points, using a magnetic field sensor and gyroscope for precise dose measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic components and sensors are integrated into the pen injection system body, then monitoring functionality is achieved, but the device becomes bulky and unwieldy
Solution Approach 1:
The monitoring system is separated from the injection pen body into a distinct monitoring module that can be attached or detached. This segmentation allows the pen to remain compact and easy to operate while the monitoring functionality exists in a separate unit, resolving the contradiction between having monitoring capabilities and maintaining ease of operation.
2Volume of moving object
If electronic components are miniaturized to reduce bulk, then device compactness is improved, but electromagnetic interference between components increases
Solution Approach 1:
A non-conductive spacer is introduced as an intermediary element between the sensor and the drive spring to prevent electromagnetic interference. This spacer acts as a mediator that maintains the necessary separation to reduce interference while allowing the components to remain in close proximity for functional operation, thus resolving the contradiction between compactness and electromagnetic interference.
3Measurement precision
If sensors are moved further from electromagnetic interference sources, then measurement accuracy is improved, but system complexity increases due to additional compensation systems
Solution Approach 1:
The non-conductive spacer serves as a simple intermediary that provides electromagnetic shielding and isolation without requiring complex compensation systems. By placing the spacer between the sensor and the drive spring, the system achieves accurate sensor readings while maintaining simplicity in the overall system configuration, resolving the contradiction between measurement precision and device complexity.
4Adaptability or versatility
If a removable monitoring module is used instead of integrated components, then universal compatibility is achieved, but connection reliability may be reduced
Solution Approach 1:
The monitoring system is extracted from the pen body as a removable module, enabling universal compatibility across different pen manufacturers. The extraction is designed with a secure attachment mechanism that maintains connection reliability during use, while allowing easy removal when not needed, thus resolving the contradiction between adaptability and connection reliability.
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 module provides a compact, universally compatible solution that accurately monitors injection progress and end points, minimizing electromagnetic interference and user discomfort.
Implementation Method 1
an injection monitoring system movable within the central longitudinal bore of the main body from a first monitoring position in which the injection monitoring system is not in abutting contact with a proximal surface of the injection activator, to a second monitoring position in which the injection monitoring system is in abutting contact with a proximal surface of the injection activator
Data Source
AI summary
An injection monitoring module adapted and configured to be removably attached to a proximal extremity of an injection pen system for delivery of a drug. The monitoring module comprises a hollow main body adapted and configured to be coaxially mounted on, and engage in co-rotation with, a dose setting wheel of the pen injection system, and a central longitudinal bore with a proximal extremity and a distal extremity and an injection monitoring system located in the bore at a proximal extremity thereof. An injection monitoring system is movable within the bore along a central longitudinal axis thereof from a first monitoring position in which the injection monitoring system is not in abutting contact with a proximal surface of an injection activator of the injection pen system, to a second monitoring position in which the injection monitoring system is in abutting contact with the proximal surface of the injection activator.