Cam-Driven Fluid Dispenser for Variable Dosing and Smooth Pump Actuation
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Solution Overview
Problem
Existing fluid product dispensers have predefined dose dispensing, require significant user effort for thick products, and suffer from mechanical clearance issues leading to blocking and chatter effects.
Innovation Solution
A dispenser design featuring a cam ring and actuating part that converts rotational movement into axial displacement to actuate the pump, with locking means to prevent clearance and create sensitive clicks for precise dosing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a push button mechanism is used to actuate the pump, then the dispenser can dispense fluid product, but the user must exert considerable pressure especially for thick products
Solution Approach 1:
The pump actuation mechanism transitions from a static push button to a dynamic cam-driven system. The cam profile converts rotational motion into controlled linear displacement of the pump piston, enabling gentle actuation of thick products without requiring high user pressure. The cam's geometric shape precisely controls the pumping stroke, ensuring reliable actuation while reducing effort.
2Reliability
If mechanical clearance is introduced between elements, then the pump can be prevented from remaining under stress in rest position, but blocking points and chatter effects occur
Solution Approach 1:
The cam mechanism is designed with preliminary geometric precision to establish exact contact points between the cam surface and follower. This preliminary positioning ensures that when the pump is in rest position, the mechanical clearance is already optimized to relieve stress without creating blocking points. The cam profile is pre-engineered to maintain smooth transitions throughout the actuation cycle, preventing chatter effects while ensuring reliable stress relief.
3Adaptability or versatility
If the push button stroke height is adjusted to vary the dose, then the user can control dispensing amount, but the dose becomes predefined and requires manual adjustment effort
Solution Approach 1:
The system replaces manual dose adjustment with a dynamic cam-driven mechanism. By varying the cam profile geometry or the cam rotation angle, the dispensing dose becomes automatically adjustable without requiring the user to manually adjust stroke height. The cam mechanism dynamically controls the pump actuation parameters, enabling flexible dose variation while maintaining ease of operation through simple rotational input.
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
Enables variable dose dispensing, reduces user effort, eliminates blocking points, and enhances user experience with pleasant tactile feedback.
Implementation Method 1
the actuating part comprising first cam means cooperating with second cam means of the cam ring so that the axial displacement is obtained by a transformation of a rotational movement of the actuating part with respect to the cam ring
Data Source
AI summary
A fluid product dispenser comprising: includes a fluid product dispensing head, a fluid product container, a dispensing pump attached to the dispensing head by an upper portion of the dispensing pump, an actuating part attached to the container and capable of an axial movement, and a cam ring that is rotatable relative to the actuating part. The actuating part includes first cam means co-operating with second cam means of the cam ring such that the axial movement is achieved by a transformation of a rotary movement of the actuating part relative to the cam ring. The axial movement cause the dispensing pump to be actuated.