Convex Piercing Tip for Reliable Foil Discharge
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Solution Overview
Problem
Existing dischargers for medical, dental, or veterinary agents face challenges in reliably piercing a variety of barrier foils and maintaining a consistent force for uniform discharge, especially when dealing with small quantities and diverse foil characteristics.
Innovation Solution
A discharger with a piercing tip having a convexly curved outer surface and a flow channel that establishes a consistent flow connection, allowing for a moderate initial piercing force and maintaining a constant force during discharge, thereby ensuring reliable piercing and complete fluid discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plunger or tip is used to pierce the barrier foil, then the foil can be pierced to discharge the fluid, but the force required for piercing varies permanently during the discharge process, making uniform discharge difficult
Solution Approach 1:
The piercing tip is designed with a convexly curved outer surface instead of a flat or pointed surface. This curved configuration allows the tip to maintain consistent contact pressure with the barrier foil throughout the piercing and discharge process, preventing permanent force changes and enabling uniform fluid discharge while ensuring reliable piercing.
2Productivity
If the piercing tip has a hollow configuration to establish flow connection, then fluid can be discharged, but the tip may become clogged by small pieces of the foil
Solution Approach 1:
The piercing tip features a localized flow channel positioned at the distal end, separated from the main body. This local flow connection allows fluid to pass through without creating a hollow cavity that could trap foil debris, ensuring reliable flow while preventing clogging.
3Reliability
If the piercing tip is made hard to ensure reliable piercing, then the foil can be pierced effectively, but the initial piercing force becomes too high for user comfort
Solution Approach 1:
The convexly curved outer surface of the piercing tip distributes the applied force more evenly across the contact area with the barrier foil. This curvature allows effective piercing with lower initial force, making the operation user-friendly while maintaining piercing reliability.
Data Source
AI summary
A discharger for discharging fluid includes a sleeve, a discharge section, a carriage including a receiving space disposed therein, the carriage cooperating with a proximal end of the sleeve such that the carriage is moveable relative to the sleeve, and a piercing tip having a flow channel configured to establish a flow connection for the fluid from the receiving space to an inlet of the discharge section, the piercing tip having a shell surface, the piercing tip being integrally formed with at least a portion of the sleeve or formed as a unitary separate piece linked with at least the portion of the sleeve, the shell surface of the piercing tip having a convexly curved configuration, and the sleeve surrounding a proximal end of the discharge section and having an outer diameter that is substantially the same as the inner diameter of the carriage.