Inhaler Fault Indicator Mechanism for Strip Integrity Detection
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Solution Overview
Problem
Prior inhaler devices fail to detect strip breakage or failure, leading to potential under-dosing as the device may continue to function without indicating a fault, even if the strip is damaged, causing medicament delivery issues.
Innovation Solution
Incorporating a fault indicator mechanism that provides visual, tactile, or audible feedback when the strip breaks or fails, preventing further actuation of the strip advancement mechanism and ensuring user awareness of the fault.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a strip advancement mechanism is used to feed medicament strips through the inhaler, then the medicament can be delivered through the mouthpiece, but the device cannot detect strip breakage or failure, leading to potential under-dosing
Solution Approach 1:
The patent implements a fault indicator mechanism that provides feedback to the user about strip integrity. The indicator includes a visual element (such as a colored window or indicator) that changes state to alert the user when the strip breaks or fails, ensuring reliable medicament delivery by preventing use of damaged strips.
Solution Approach 2:
The patent replaces complex electronic detection systems with a simpler mechanical fault indicator system. The indicator uses mechanical elements (such as a follower, lever, or direct visual indicator) that respond to strip breakage through mechanical means, reducing device complexity while maintaining reliability.
2Reliability
If the strip breaks or tears in the lead spool area, then the pull-through mechanism cannot pull the strip through correctly, but the user would not necessarily notice since the feed mechanism would still feel like it is functioning
Solution Approach 1:
The fault indicator provides immediate visual feedback to the user when strip breakage occurs in the lead spool area. The indicator mechanism is positioned to detect strip integrity issues and communicate this information clearly to the user, preventing loss of fault detection information.
Solution Approach 2:
The fault indicator is designed to detect and alert users of strip breakage before it affects medicament delivery. By providing early warning of strip failures, the system allows users to stop using the inhaler before under-dosing occurs.
3Reliability
If the cover sheet loop or post fails, then further winding up of the cover sheet may not be possible, preventing correct peeling away from the base sheet
Solution Approach 1:
The fault indicator mechanism detects failures in the cover sheet loop or post and provides visual feedback to the user. This allows the system to maintain reliability by alerting users to peeling mechanism failures without requiring complex detection systems.
Data Source
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AI summary
A fault indicator for an inhaler comprises a strip advancement mechanism. The inhaler may comprise a strip (22) having a releasable product therein, releasable by peeling a cover sheet (32) from a base sheet (30). The fault indicator may be an element that is biased to bear against the strip (22) or a component (30, 32) thereof. Alternatively, it may be an indicia on a guide surface for the strip (22), or a component (30, 32) thereof.