Push Button Needle Recess Stabilizes Vortex Chamber
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Solution Overview
Problem
Conventional push buttons for dispensing systems produce aerosols of poor quality due to unstable vortex formation and tip decentration, leading to inconsistent product delivery and orifice blockage over time.
Innovation Solution
A push button design featuring a needle with a recessed distal wall to stabilize the vortex chamber and prevent convexity, combined with a spring-actuated mechanism for reversible closure of the dispensing orifice, ensuring consistent aerosol quality and reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conical tip needle is used to ensure self-centering and seal, then the orifice closure is effective, but the vortex becomes unstable and aerosol quality degrades over time
Solution Approach 1:
The invention extracts the problematic conical tip from the needle design and replaces it with a flat distal wall. This removal of the self-centering feature eliminates the vortex instability and aerosol quality degradation while maintaining effective orifice closure through the flat wall's direct sealing capability.
Solution Approach 2:
Instead of using a conical tip that points inward to self-center, the invention inverts the approach by using a flat distal wall that faces the orifice directly. This inversion changes the sealing mechanism from friction-based self-centering to direct surface contact sealing, resolving the vortex stability issue.
2Reliability
If a conical tip needle is used for self-centering, then initial sealing is achieved, but the tip blocks the orifice inlet over time
Solution Approach 1:
The invention removes the conical tip geometry that causes orifice blocking over time. The flat distal wall design eliminates the progressive blockage issue while maintaining initial sealing effectiveness through direct contact with the orifice surface.
3Reliability
If the needle is spring-actuated for reversible closure, then the orifice remains closed between uses preventing product drying, but the mechanism complexity increases
Solution Approach 1:
The spring-actuated needle mechanism automatically closes the orifice when not in use without requiring additional components or complex control systems. The spring provides self-service by automatically returning the needle to the closed position, preserving product while maintaining relatively simple mechanism 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
The design stabilizes the vortex chamber, maintaining consistent aerosol quality and preventing orifice blockage, thus ensuring reliable and reproducible product delivery from one use to another.
Implementation Method 1
said needle being spring-actuated to move between a closed position of the dispensing orifice and an open position of the dispensing orifice
Implementation Method 2
said needle having a surface in communication with the distribution path to move said needle into the open position by pressurizing the product in said path
Implementation Method 3
the vortex chamber is arranged to cause the product to rotate very rapidly so that it escapes through the orifice with sufficient speed to break up into fine droplets suspended in the air in order to form an aerosol
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
The push-button has a body (1) provided with a mounting shaft (3) that is mounted on a pressurized product supply tube. Housing is equipped with a passage for dispensing a product between a shaft and a swirl assembly. A swirl chamber (11) comprises a distribution opening (12) and a supply channel (13). An actuation bearing (22) is connected with the dispensing passage. A needle (21) is provided with a distal wall (21a) arranged opposite to the dispensing opening to form a base of the swirl chamber when the needle is in opening position. A recess (33) is formed in the distal wall. An independent claim is also included for a pressurized product dispensing system comprising a discharge device equipped with a pressurized product supply.