Dual Dispenser Dose Adjustment via Rotating Pusher
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Solution Overview
Problem
Existing duo dispensers with dose adjustment mechanisms are not discreet, as they feature a visible rotating ring that gives the device a technical appearance, and there is a need to integrate the dose adjustment mechanism into a conventional dispenser configuration.
Innovation Solution
The solution involves a pusher that is both rotatably mounted on and integral with a cap, which acts as the gripping member and performs the additional function of limiting the axial travel of the actuating rods, allowing the adjustment insert to be concealed, thus giving the dispenser a classic configuration similar to a single-pump dispenser.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotating ring is used to limit the axial stroke of actuating rods for dose adjustment, then the dose adjustment function is achieved, but the dispenser has a marked technical appearance and is not discreet
Solution Approach 1:
The patent merges the gripping member (pusher) with the stroke limitation function by integrating the adjustment insert into the pusher assembly. The adjustment insert is positioned within the pusher such that rotating the pusher simultaneously adjusts the stroke limitation, eliminating the need for a separate visible rotating ring while maintaining dose adjustment capability
Solution Approach 2:
The pusher is given multiple functions: it acts as both the actuating member for dispensing fluid and the adjustment mechanism for dose control. By making the pusher rotatable and integrating the adjustment insert, a single component performs both primary actuation and secondary adjustment functions, reducing the number of visible technical components
2Ease of operation
If the adjustment insert is made accessible and visible for user interaction, then dose adjustment is possible, but the dispenser loses its conventional appearance
Solution Approach 1:
The adjustment insert is merged with the pusher assembly, which is already a visible and necessary component of the dispenser. This allows the adjustment function to be accessed through the pusher without requiring separate adjustment windows or exposed mechanical components that would disrupt the conventional appearance
3Measurement precision
If a separate adjustment mechanism is provided independent of the push button, then dose adjustment is precise, but the device structure becomes more complex
Solution Approach 1:
The adjustment insert is integrated into the pusher assembly rather than being a separate independent component. The adjustment insert rotates with the pusher, and the cap abuts on the adjustment insert to limit axial travel, creating a unified mechanism that maintains precision while reducing structural complexity
Solution Approach 2:
The pusher assembly serves dual purposes: primary actuation of the pump and secondary adjustment of the dose. The adjustment insert within the pusher allows precise stroke limitation while being actuated through the same component used for dispensing, eliminating the need for separate adjustment mechanisms
Data Source
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AI summary
A dual dispenser comprising: - two pumps (P1, P2) associated with two reservoirs and each comprising a pump body (P10, P20) and an actuation rod (P11, P21) that is axially movable over an axial stroke, - a dispensing head comprising a dispensing opening (O) for the fluid products from the actuation rods (P11, P21), characterised in that the dispensing head comprises: o a cover (1) mounted on the actuation rods (P11, P21) and forming the dispensing opening (O), o a pusher (2) mounted on the cover (1) in order to move it back and forth axially, the pusher (2) being further mounted so as to be able to rotate relative to the cover (1), o an adjustment insert (3) arranged under the cover (1) and secured to the pusher (2) so as to turn with same, the cover (1) abutting on the adjustment insert (3), thus limiting the axial stroke of the actuation rods (P11, P21).