Micro Nozzle Cartridge Assembly for Spray Device Waste Reduction
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Solution Overview
Problem
Existing medicament delivery devices require the entire container holder to be replaced when the device is reused, leading to unnecessary waste.
Innovation Solution
A spray device assembly where a micro nozzle is permanently attached to a cartridge, allowing the cartridge and nozzle to be discarded together after use, eliminating the need to replace the entire container holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire container holder is replaced when the medicament is spent, then the device can be reused, but unnecessary waste is generated
Solution Approach 1:
The device is divided into separate components: a reusable container holder and a disposable cartridge assembly (cartridge + micro nozzle). This segmentation allows the holder to be reused while only the consumable cartridge is discarded, resolving the contradiction between device reusability and waste reduction.
Solution Approach 2:
The cartridge assembly is designed as a disposable component that is inexpensive to manufacture and replace. By making the cartridge (containing the liquid and micro nozzle) disposable rather than the entire holder, the system enables device reuse while minimizing waste of valuable components.
2Loss of substance
If the micro nozzle is permanently attached to the cartridge, then the cartridge and nozzle can be discarded together, but the assembly complexity increases
Solution Approach 1:
The micro nozzle is permanently attached to the cartridge, merging these two components into a single disposable assembly. This combination ensures that both the cartridge and micro nozzle are discarded together as one unit, eliminating waste of the micro nozzle while keeping the overall system simple through integrated design.
3Loss of substance
If the micro nozzle is permanently attached to the cartridge, then the entire device doesn't need to be replaced, but the manufacturing process becomes more complex
Solution Approach 1:
The micro nozzle is attached to the cartridge during the manufacturing process before the cartridge is filled with medicament. This preliminary attachment allows the disposable assembly to be pre-assembled and sterilized, simplifying the overall manufacturing process while enabling waste reduction through the disposable design.
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 enables easy replacement of spent cartridges and nozzles without wasting the entire device, promoting sustainability and reducing waste.
Implementation Method 1
a cartridge containing a liquid to be pressurised, and a micro nozzle configured to produce an aerosol from the pressurised liquid
Implementation Method 2
a crimp seal crimped to the cartridge, wherein the cartridge adapter and the micro nozzle cooperate with the crimp seal to be permanently attached to the cartridge
Implementation Method 3
the micro nozzle is arranged with a press fit in the hole and/or is glued to the syringe
Data Source
AI summary
An assembly for a spray device is presented where the assembly has a cartridge containing a liquid to be pressurised, and a micro nozzle configured to produce an aerosol from the pressurised liquid, wherein the micro nozzle is permanently attached to the cartridge.