Fluid Dispenser Variable Volume Sampling Space
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Solution Overview
Problem
Existing fluid dispensers with fixed volume sampling and application spaces are not suitable for viscous products like creams and gels, as they fail to ensure complete filling and emptying, and often require overcoming elastic resistance during application.
Innovation Solution
A fluid dispenser with a sampling and application space of variable volume, achieved through a sliding sleeve and fixed rod mechanism, allowing for progressive filling and emptying without elastic resistance, made entirely from plastic to exclude metal and maintain simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed volume sampling and application space is used, then the structure is simple, but viscous products cannot be completely filled and emptied
Solution Approach 1:
The sampling and application space is designed with variable volume through the interaction between the movable applicator member and the reservoir wall. As the applicator is withdrawn, the space expands dynamically to accommodate viscous products completely, and contracts during application to ensure complete emptying, resolving the contradiction between structural simplicity and reliable product transfer.
2Device complexity
If a fixed volume sampling space is used, then the device structure is simple, but the product transfer efficiency is poor for viscous materials
Solution Approach 1:
The sampling space volume varies dynamically during the application cycle. When the applicator is fully inserted, the space is minimal; as it withdraws, the space expands to draw in viscous product through the dip tube. This dynamic volume change ensures complete product transfer without requiring complex pumping mechanisms, maintaining device simplicity while improving productivity.
3Reliability
If elastic biasing force is applied to the sleeve, then the filling mechanism is improved, but the application resistance increases
Solution Approach 1:
The elastic biasing force previously applied to the sleeve is removed entirely. Instead, the filling mechanism relies on the pressure differential created by the variable volume sampling space and the dip tube configuration. This extraction of the elastic element eliminates application resistance while maintaining reliable filling through the redesigned fluid dynamics.
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
Ensures complete filling and emptying of the sampling space, providing a softer and more pleasant application experience by varying the volume of the sampling and application space, suitable for viscous products without the need for metal components.
Implementation Method 1
the fluid product stored in the withdrawal space is gradually transferred by a surface tension phenomenon to the skin of the user
Data Source
AI summary
The invention relates to a fluid-product dispenser comprising: - a fluid-product reservoir (1) containing fluid product, - a variable-volume fluid-product suction chamber (C) that has a removal and application space (E) having a volume that is variable between a minimum volume when the suction chamber (C) has a minimum volume and a maximum volume when the suction chamber (C) has a maximum volume, - a dip tube (24) that connects the reservoir (1) to the suction chamber (C) at an orifice (22), - suction means (31, 8) for sucking fluid product, during a suction phase, from the reservoir (1) into the chamber (C) through the orifice (22), - a removal and application member (P) which partially defines the suction chamber (C) and the suction means (31, 8), this removal and application member (P) defining the removal and application space (E), characterized in that the sliding of the sliding sleeve (8) on the fixed rod (7) is free of elastic stress force.