Injection Pen Cam Sensor for Automated Dose Recording
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Solution Overview
Problem
Existing injection devices lack effective means to electronically record and manage dose administration, requiring manual logging of injection parameters which can be error-prone and inefficient.
Innovation Solution
An apparatus within the injection device featuring a cam part, follower part, and a contact sensor that detects the reciprocating motion of the follower part, allowing for electronic recording of dose delivery through a piezo-electric sensor and electronics system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual data logging is used to record injection parameters, then the device complexity is low, but the reliability of dose management is reduced due to error-prone manual recording
Solution Approach 1:
The patent replaces the manual mechanical recording system with an electronic sensing system. A contact sensor detects the reciprocating motion of the follower part mechanically coupled to the dose dispensing mechanism, converting mechanical motion into electrical signals for automated dose measurement and recording, thereby eliminating manual logging errors.
Solution Approach 2:
The injection device automatically detects and records its own operational parameters through the contact sensor that monitors the follower part's motion. The system self-measures the dose delivered without requiring external manual intervention, enabling the device to autonomously track and manage injection data.
2Measurement precision
If a contact sensor is added to detect follower part motion, then the measurement precision of dose delivery is improved, but the device complexity increases
Solution Approach 1:
The follower part serves as a mechanical intermediary that transmits the motion of the dose dispensing mechanism to the contact sensor. This intermediary component enables the sensor to indirectly measure dose delivery through the reciprocating motion it generates, providing precise measurement without requiring direct integration into the complex dispensing mechanism.
3Productivity
If automated electronic recording is implemented, then the productivity of dose management is improved, but the ease of operation is reduced due to additional system components
Solution Approach 1:
The contact sensor provides real-time feedback on the follower part's reciprocating motion, which corresponds to dose delivery events. This feedback mechanism enables automated tracking and recording of injection parameters, allowing the system to efficiently monitor and manage multiple doses without manual intervention, thereby improving productivity.
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 and automated dose management by electronically recording dose measurements, improving accuracy and convenience in monitoring injection parameters.
Implementation Method 1
a contact sensor provided between the cam part and the follower part and configured to detect the reciprocating motion of the follower part
Data Source
AI summary
An apparatus configured to be arranged within a housing of an injection device and for detecting a manipulation of the injection device comprises a cam part that is configured to be rotatable relative to a follower part; a resilient member arranged to urge the cam part and the follower part towards abutment with each other wherein rotation of the cam part relative to the follower part causes reciprocating motion of the follower part, wherein the follower part is configured to move reciprocally in an axial direction of the injection device; and a contact sensor provided between the cam part and the follower part and configured to detect the reciprocating motion of the follower part. The cam part comprises a profiled section comprising an axially varying profile arranged to be in abutment with the follower part and configured to cause reciprocating motion of the follower part.