Fluid Cartridge Dispenser Assembly With Switchable Spring Pressure
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Solution Overview
Problem
Existing fluid product dispensers require complex assembly operations involving simultaneous pressurization and module connection, which demands dexterity and strength, often leading to liquid loss due to improper handling.
Innovation Solution
The dispenser design allows for consecutive assembly and pressurization of modules, with the spring support movable between active and rest positions, enabling easy connection without spring pressure during assembly and automatic disarming when the cartridge is empty.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the spring is compressed during module assembly to pressurize the fluid cartridge, then the fluid product is pressurized for dispensing, but the assembly operation becomes complex and difficult requiring dexterity and strength
Solution Approach 1:
The invention divides the operation into two separate phases: assembly phase and pressurization phase. During assembly, the support is in the rest position with the spring relaxed, allowing easy connection of modules. After assembly, the support is moved to the active position to compress the spring and pressurize the fluid. This segmentation resolves the contradiction by separating the pressurization function from the assembly operation.
Solution Approach 2:
The support is designed to be moved to the active position after module assembly is complete. This preliminary sequencing ensures that the spring is only compressed when the cartridge is already in place, eliminating the need for dexterity and strength during assembly while still achieving the necessary pressurization for fluid dispensing.
2Stress or pressure
If the spring is compressed during module assembly, then the fluid product is pressurized, but improper handling leads to loss of liquid product
Solution Approach 1:
By separating assembly and pressurization into distinct phases, the invention prevents liquid loss during assembly when the spring should not be compressed. The support remains in the rest position during assembly, keeping the fluid at atmospheric pressure and preventing accidental dispensing or leakage.
Solution Approach 2:
The invention incorporates a sealing mechanism that detects when the cartridge is properly installed before allowing spring compression. The seal ensures the cartridge is securely in place before pressurization begins, providing feedback control that prevents liquid loss from improper handling during the pressurization process.
3Stress or pressure
If the support is fixed in the active position, then the spring continuously pressurizes the fluid, but the cartridge cannot be easily replaced
Solution Approach 1:
The support is designed as a movable component that can transition between the rest position and active position. During cartridge replacement, the support is moved to the rest position to release spring pressure, allowing easy removal and installation of cartridges. After replacement, the support is moved back to the active position to resume pressurization. This dynamic design resolves the contradiction between maintaining continuous pressure and enabling easy replacement.
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
Facilitates easy replacement of fluid cartridges by disengaging spring pressure during assembly, providing visual, audible, and tactile indications of emptiness, ensuring seamless operation and reducing liquid loss.
Implementation Method 1
a spring resting on a support, so as to move the movable wall to expel fluid product out of the fluid product cartridge
Implementation Method 2
the spring acts between the thrust head and the support, causing the thrust and support members to move apart
Implementation Method 3
the spring is compressed and a rest position in which the spring is relaxed. This allows the reservoir module to be connected to the dispensing module with the support in the rest position, and then the support to be moved to the active position. Thus, the spring does not act on the cartridge during module assembly: the fluid stored in the cartridge is at atmospheric pressure
Data Source
Figure 1~2
Figure 3a~3c
Figure 4a~4d
AI summary
The invention relates to a dispenser comprising: a - a reservoir module (R') comprising a case (RT) for accommodating a fluid product cartridge (C) defining a movable wall (C2) biased by a spring (R4) resting on a bearing (R31); b - a dispensing module comprising an outlet valve for controlling the passage of the fluid product released under pressure from the fluid product cartridge (C), wherein the reservoir module (R') is removably connected to the dispensing module, characterised in that the bearing (R31) of the spring (R4) is movable relative to the casing (R1') between an active position in which the spring (R4) is compressed and a rest position in which the spring (R4) is relaxed, thereby allowing the reservoir module (R') to be connected to the dispensing module with the bearing (R31) in the rest position and the bearing (R31) subsequently in the active position.