Inhaler Discharge Detection via Movable Wall
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Solution Overview
Problem
Generic inhalers often fail to reliably detect discharging operations due to tolerances in the position of the medium container, leading to incorrect counting of doses and potential malfunction from exposure to moisture, especially when using push-button sensors directly in the inhalation region.
Innovation Solution
The design incorporates a movable detecting wall portion within the housing that displaces relative to the main portion during a discharging operation, with a discharge sensor positioned to detect this movement, ensuring reliable detection and protection from moisture, and an integral connection for automatic return and liquid-tight construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a push-button sensor is disposed directly in the inhalation region to detect medium container movement, then the discharge detection function is provided, but the reliability of detection deteriorates due to position tolerances and moisture exposure
Solution Approach 1:
The detecting wall portion is separated from the main housing body, allowing independent movement and detection. This segmentation enables the sensor to detect wall portion movement rather than directly detecting medium container movement, thereby reducing sensitivity to position tolerances and improving detection reliability in humid environments.
Solution Approach 2:
The detecting wall portion acts as an intermediary element between the medium container and the discharge sensor. When the medium container is displaced, it moves the detecting wall portion, which in turn actuates the sensor. This indirect detection mechanism through an intermediary reduces the impact of moisture and position tolerances on sensor reliability.
2Measurement precision
If a pressure sensor is disposed in the discharge channel to detect medium discharge, then accurate discharge detection is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent replaces complex pressure sensing mechanisms with a simple mechanical push-button sensor. Instead of measuring pressure changes in the discharge channel, the system uses the mechanical movement of the detecting wall portion (which moves with the medium container) to directly actuate the sensor, achieving accurate discharge detection with simpler and more cost-effective components.
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
This solution provides a cost-effective and reliable method for accurately counting discharging operations, preventing errors in dose counting and ensuring the sensor's longevity by isolating it from the inhalation region and using a resilient, deformable connection for the detecting wall portion.
Implementation Method 1
the detecting wall portion is displaceable relatively to the main portion and is configured and/or disposed such that it is displaced relatively to the main portion of the housing during a discharging operation
Implementation Method 2
The detecting wall portion is connected to the main portion of the housing in such a way that the detecting wall portion returns automatically on completion of a discharging operation
Data Source
AI summary
An inhaler for the oral administration of a pharmaceutical medium, having a housing with a mouthpiece, a container unit accommodated in an inhalation region of the housing and including a medium container and an outlet connector having an outlet orifice, which outlet connector is capable of being moved relative to the medium container for the purpose of triggering a discharging operation, and a discharge sensor for the detection of a discharging operation.The housing has a main portion and a detecting wall portion capable of movement relative to the main portion and which is configured and/or disposed for displacement relative to the main portion during a discharging operation, and the discharge sensor detects the displacement of the detecting wall portion in relation to the main portion of the housing.