Metered Dose Inhaler Mechanical Counter Integration
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Solution Overview
Problem
Existing metered dose inhalers (MDIs) face challenges in providing a reliable dose counting function while incorporating additional monitoring and evaluation functions, which complicates the confirmation of dose counting reliability.
Innovation Solution
The integration of a mechanical dose counter with a triggering unit and a processing unit in the MDI, allowing for reliable dose counting and enabling additional monitoring and evaluation functions through electrical signals and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical dose counter is used for dose counting, then reliability of dose counting is improved, but additional monitoring functions cannot be implemented
Solution Approach 1:
The patent combines a mechanical dose counter with an electrical triggering unit and processing unit into a single integrated system. The mechanical indicator member triggers electrical switches that generate signals processed by the processing unit, merging mechanical reliability with electronic monitoring capabilities in one unified device.
Solution Approach 2:
The system performs multiple functions simultaneously: the mechanical dose counter provides reliable dose counting while the electrical triggering unit and processing unit enable monitoring and evaluation functions. This multi-functional design allows the same device to serve both traditional dose tracking and advanced patient monitoring purposes.
2Adaptability or versatility
If additional monitoring functions are added to the inhaler, then versatility is improved, but confirmation of dose counting reliability becomes difficult
Solution Approach 1:
The system segments functions into distinct modules: a mechanical dose counter for reliable counting, a triggering unit for signal generation, and a processing unit for data handling. This modular segmentation maintains clarity and reliability confirmation while enabling additional monitoring capabilities.
3Device complexity
If only a mechanical dose counter is provided, then device complexity is reduced, but additional monitoring and evaluation functions cannot be implemented
Solution Approach 1:
The triggering unit acts as an intermediary between the mechanical dose counter and the processing unit. The mechanical indicator member triggers the electrical switches, which generate signals that are then processed. This intermediary mechanism bridges mechanical and electrical systems, enabling monitoring functions while maintaining mechanical reliability.
Data Source
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AI summary
A metered dose inhaler (1) for dispensing aerosol doses comprises an actuation housing (2) adapted to receive a canister (4). The canister (4) is configured to move from a rest position to an activation position in which a valve (7) of the canister (4), positioned at a valve end (8) of the canister (4), is depressed against a bottom portion of the actuation housing such that an aerosol dose is released. The inhaler (1) further comprises a mechanical dose (10) counter comprising an indicator member which is constructed and arrangement to undergo a predetermined count-indicating motion when an aerosol dose is released. Moreover, the inhaler (1) comprises a triggering unit (11) for triggering at least one electrical switch (12) when the canister (4) is moved from the rest position to the activation position whereby an electrical signal is generated. Also part of the inhaler (1) is a processing unit for processing the signal generated by the switch (12) upon being triggered.