Nasal Spray Device with Rotational Actuation for Dose Reproducibility
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Solution Overview
Problem
Existing nasal spray devices require manual force to deliver medicinal products, leading to inconsistent droplet size, spray length, and angle, making them non-reproducible and difficult to manipulate.
Innovation Solution
A device with a piston and pusher mechanism, biased by springs and actuated by rotational and axial movements, allowing for automatic and reproducible delivery of two predetermined doses without user intervention, ensuring consistent spray quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual force is applied to push the piston, then the spray is created, but the spray parameters (droplet size, length, angle) are not reproducible
Solution Approach 1:
The device uses a spring mechanism that automatically pushes the piston without requiring manual force from the user. The spring stores energy and releases it to create the spray, making the system self-serving and eliminating variability introduced by human force application.
Solution Approach 2:
The manual mechanical pushing action is replaced with an automatic spring-driven mechanical system. This substitution eliminates the need for user force application and ensures consistent spray parameters through controlled mechanical energy release.
2Power
If high force is applied to create spray, then the spray is generated, but the device becomes difficult to manipulate
Solution Approach 1:
The spring is pre-compressed to store mechanical energy before use. This preliminary action prepares the system to generate spray power automatically when activated, eliminating the need for the user to apply high force during operation.
Solution Approach 2:
The spring mechanism serves itself by automatically converting stored potential energy into kinetic energy to push the piston and generate spray, without requiring continuous user force application.
3Reliability
If manual pressing is required to maintain pressure, then the spray is created, but the spray parameters vary from dose to dose
Solution Approach 1:
The manual pressure maintenance mechanism is replaced with an automatic spring-driven system that consistently delivers the required force for each dose, ensuring uniform spray parameters across multiple doses through controlled mechanical energy release.
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 device delivers two doses with improved reproducibility and precision, independent of user force, enhancing the quality and consistency of the spray.
Implementation Method 1
first biasing means designed for tending to urge said pusher in the distal direction
Implementation Method 2
said first and/or second actuation means are at least rotationally displaceable, said rotation causing at least part of the deactivation of said first and/or second retaining means
Data Source
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Figure 5~6
AI summary
The invention relates to a device (1) for delivering two predetermined doses of a product (3), comprising: - a container (2) for containing said product, said container having a distal end (2d) through which the product is delivered under the distal pressure of a piston, - a pusher (7) movable with respect to said container for causing said piston (4) to move in the distal direction from an initial position, in which none of said product has been expelled to a first position, in which a first dose of said product has been expelled, and to a second position, in which a second dose of said product has been expelled, - a holder body (15) receiving said container and said pusher (7), - biasing means (22) for urging said pusher (7) in the distal direction, from the initial to the first position, and to the second position, - first and second retaining means (9, 11, 19) for maintaining said pusher (7) in said initial position, and in said first position, - first and second actuation means (18) to deactivate said first and second retaining means (9, 11, 19), characterized in that said first and/or second actuation means (18) are at least rotationally displaceable, said rotation causing at least part of the deactivation of said first and/or second retaining means (9, 11, 19).