Inhaler Blister Strip Winding Drum With Spring Compensation
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Solution Overview
Problem
Existing inhalers face challenges in optimizing the storage of used band-shaped blister strips, which can lead to inefficiencies and environmental issues due to the handling of empty blister pockets.
Innovation Solution
A conveyor system with a receiving apparatus that includes a drum for winding up the used blister strip, driven by a transmission with a variable transmission ratio and a compensation element, such as a spring, to maintain tension and prevent loop formation, ensuring efficient storage and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed transmission ratio is used in the drum drive, then the structure is simpler, but the used part cannot be kept taut due to varying winding diameter
Solution Approach 1:
The patent applies the dynamics principle by implementing a transmission mechanism with variable transmission ratio that adapts to the changing winding diameter. As the drum winds the used blister strip, the transmission ratio automatically adjusts to maintain constant peripheral speed, ensuring the used part remains taut throughout the winding process. This dynamic adjustment resolves the contradiction between maintaining tautness and keeping the structure simple.
2Reliability
If a spring compensation element is added to the transmission, then the used part remains taut, but the device becomes more complex
Solution Approach 1:
The patent applies the parameter changes principle by incorporating a spring compensation element that dynamically adjusts the transmission ratio based on the winding diameter. The spring mechanism modifies the mechanical parameters of the transmission system, allowing it to compensate for the varying radius as the drum winds the used strip. This ensures consistent winding tension and reliable operation, justifying the additional component for enhanced performance.
3Volume of stationary object
If the drum diameter increases during winding, then more used part can be stored, but the peripheral speed varies causing loose winding
Solution Approach 1:
The patent applies the dynamics principle by using a transmission mechanism with variable transmission ratio that automatically adapts to the increasing drum diameter during winding. As the drum accumulates more used blister strip and its diameter grows, the transmission ratio adjusts to maintain constant peripheral speed. This dynamic adjustment ensures uniform and stable winding throughout the storage process, preventing loose or irregular winding patterns.
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
The solution allows for optimized storage of used blister strips, maintaining tension and preventing loop formation, thereby enhancing the inhaler's efficiency and environmental resistance while maintaining a compact structure.
Implementation Method 1
a compensation element, in particular a spring
Data Source
AI summary
An inhaler for delivery of a powder-form inhalation formulation from a blister strip with a plurality of blister pockets. The used part of the blister strip with empty blister pockets is wound onto a drum which is driven via a gear mechanism which is coupled to the drum via a spring. The spring allows for the different peripheral speeds of the wound-up part to be compensated.