Ophthalmic Drop Dispenser With Conical Flow Blocking
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Solution Overview
Problem
Existing liquid dispensers, particularly for ophthalmic liquids, face challenges in efficiently dispensing individual drops without complex structures that introduce air into the reservoir and incur high costs.
Innovation Solution
A dispenser design featuring a flange, bushing, and domed tip with a conical element inside, utilizing two flanges and a conical element to obstruct liquid flow, allowing precise drop dispensing with minimal air introduction, avoiding intricate constructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a complex dispenser structure with multiple components is used to prevent air entry, then air introduction is reduced, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates the air introduction problem by using a simple conical blocking element that prevents air from entering the reservoir while allowing liquid to pass through. The conical shape with its specific geometry naturally blocks air bubbles while maintaining liquid flow, removing the need for complex multi-component air prevention mechanisms.
Solution Approach 2:
Instead of using complex structures to prevent air entry, the invention inverts the approach by using a simple conical element that passively blocks air through its geometry while allowing liquid flow. The conical shape creates a natural barrier that exploits the difference between liquid and air properties, reversing the need for active air prevention mechanisms.
2Manufacturing precision
If precise construction elements are used to control liquid flow, then drop dispensing precision is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The invention changes the geometric parameters of the blocking element to a conical shape with specific dimensions (height and base diameter) that naturally control liquid flow. This geometric parameter optimization allows precise drop dispensing without requiring complex precision machining or multiple components, as the cone's geometry itself regulates the flow characteristics.
Solution Approach 2:
The conical blocking element introduces local quality variations in the liquid flow path, where the tapered geometry creates different flow conditions at different heights. The narrowing cone shape naturally accelerates and controls liquid flow locally, enabling precise drop formation without requiring the entire dispenser structure to be precisely manufactured.
3Ease of manufacture
If a simple dispenser structure is used, then manufacturing cost is reduced, but liquid flow control precision deteriorates
Solution Approach 1:
The invention achieves precise liquid flow control by optimizing the geometric parameters of a simple conical blocking element. The specific height and base diameter of the cone create natural flow regulation that enables precise drop dispensing while maintaining a simple, low-cost structure that can be manufactured as a single piece or with minimal components.
4Manufacturing precision
If multiple components are used to block liquid flow, then drop dispensing control is improved, but device complexity increases
Solution Approach 1:
The invention merges the functions of multiple components into a single conical blocking element. The cone simultaneously performs liquid flow blocking, drop formation control, and air prevention functions that would traditionally require separate components. This consolidation maintains precise drop dispensing control while significantly reducing device complexity and component count.
Data Source
Figure 1~2
Figure 3~6
AI summary
The object of the invention is a dispenser for dispensing liquids, in particular ophthalmic liquids, where the medicine is usually dispensed as individual drops. The dispenser for dispensing liquids, in particular ophthalmic liquids, according to the invention, is mounted on the neck of a reservoir, in particular a bottle, and it is made of a flange connected to a bushing and with a domed tip situated on the opposite side of the bushing, the flange being fitted onto the neck of the reservoir and the bushing entering the neck of the reservoir, while a dispensing domed tip comprising a dispensing opening protrudes outside the reservoir. The dispenser is characterised in that inside the bushing (3) and the domed tip (4) there is a conical element (6) placed therein, blocking the flow of liquids, the opening (5) in the domed tip (4) having an inner flange (7). The conical element (6) blocking the flow has a flange (10) at the base of the cone. The flange (7) situated in the dispensing domed tip (4) is ended from the inside with a fin (8) directed towards the conical element (6) blocking the flow of liquids.