Inhaler Life Span Blocking Device Prevents Reuse
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Solution Overview
Problem
Existing inhalers lack a secure and simple mechanism to prevent further use after a predetermined number of operations, risking re-use and potential misuse.
Innovation Solution
A life span blocking device (LSB) is introduced, which blocks the movement or opening of the inhaler's cover when a predetermined number of uses is reached, ensuring secure and intuitive blocking by a locking element biased into an interlocking position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocking mechanism is added to prevent re-use of the inhaler, then reliability is improved, but device complexity increases
Solution Approach 1:
The locking element is nested within the cap assembly, with the locking protrusion integrated into the cap's structure. The locking element interacts with the mouthpiece housing through a recess, creating a compact nested arrangement that prevents re-use without adding external complexity
Solution Approach 2:
The locking element is spring-biased to automatically engage the locking protrusion with the recess in the mouthpiece housing. This self-actuating mechanism eliminates the need for separate control systems or manual intervention, achieving reliable blocking through the device's own structural features
2Reliability
If a locking element with spring bias is used to block cover movement, then reliability of blocking is improved, but ease of operation deteriorates
Solution Approach 1:
The locking element is designed with dynamic characteristics, being spring-biased to automatically engage and disengage based on cap movement. During normal operation, the cap can move freely until the blocking condition is met, at which point the spring bias automatically activates the locking mechanism. This dynamic behavior maintains ease of operation during intended use while providing secure blocking when needed
Data Source
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AI summary
An inhaler (1) is proposed for delivering a preferably powdered formulation from a blister strip (3) having a plurality of blister pockets (4). The inhaler comprises a life span blocking device (31) which blocks opening of a cover (15) of the inhaler in a blocking state by means of locking element (39) interlocking the cover with a housing (19) of the inhaler.