Scroll-Wheel Fluid Dispenser for Precise Single-Handed Dosing
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Solution Overview
Problem
Conventional fluid dispensers, such as syringes, often cause intimidation and reluctance among patients, are cumbersome, and lack single-handed operation capability, leading to imprecise dosing and product waste due to fluid leakage or excess extrusion.
Innovation Solution
A fluid dispenser with a housing, scroll wheel, first and second gears, and a plunger mechanism that allows for single-handed operation, precise dosing, and includes a lock for child resistance, featuring a gear system that translates rotational movement into linear motion for controlled fluid dispensing with auditory and haptic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional syringes are used for fluid dispensing, then precise dosing is achieved, but patient intimidation and reluctance increase
Solution Approach 1:
The patent creates a non-medical copy of the syringe mechanism (dropper with gear system) that replicates the precise dosing function without the intimidating syringe appearance. The gear-driven plunger mechanism copies the controlled fluid displacement principle while using familiar dropper aesthetics to reduce patient anxiety.
Solution Approach 2:
The patent introduces an intermediary mechanism (gear system with scroll wheel) between the user input and fluid dispensing. This intermediary translates simple rotational motion into precise linear plunger movement, maintaining dosing accuracy while eliminating the need for direct manual plunger manipulation that causes patient reluctance.
2Object-affected harmful factors
If alternative fluid dispensers are designed to be less intimidating, then patient acceptance improves, but dosing precision and single-handed operation capability deteriorate
Solution Approach 1:
The patent replaces the simple manual push mechanism with a gear-driven mechanical system. The scroll wheel and gear assembly automatically convert rotational input into precise linear plunger movement, ensuring accurate dosing without requiring complex manual manipulation or two-handed operation.
Solution Approach 2:
The gear system performs self-service by automatically translating user input into the correct plunger movement. The mechanical advantage provided by the gears ensures that simple scroll wheel rotation automatically produces the precise linear displacement needed for accurate dosing, without requiring user skill or effort.
3Ease of operation
If manual actuation is used in conventional devices, then operation simplicity is maintained, but fluid leakage and excess extrusion occur due to fluid momentum
Solution Approach 1:
The patent incorporates feedback through the gear system that mechanically links scroll wheel rotation to plunger movement. The gear teeth engagement provides inherent feedback that stops plunger movement precisely when the desired volume is dispensed, preventing fluid momentum from causing over-extrusion or leakage.
Solution Approach 2:
The gear mechanism converts continuous scroll wheel rotation into periodic, controlled plunger movements. Each gear tooth engagement creates a discrete, controlled displacement increment, ensuring fluid is extruded in precise portions rather than continuous flow that leads to waste.
4Ease of operation
If single-handed operation is implemented, then patient accessibility improves, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into a single integrated mechanism. The scroll wheel simultaneously serves as the user interface, the drive mechanism, and the dosing control. The gear system combines rotational input conversion, plunger actuation, and dosing precision control into one unified assembly that operates with a single hand.
Solution Approach 2:
The scroll wheel component performs multiple functions: it provides the user interface for input, drives the gear mechanism through mechanical engagement, controls the plunger movement speed and distance, and provides tactile feedback. This multi-functionality reduces the number of separate components needed while maintaining single-handed operation capability.
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 precise and user-friendly fluid dispensing with single-handed operation, reducing stigma and minimizing waste by ensuring accurate dosing and preventing excess fluid extrusion.
Implementation Method 1
a gear system that translates rotational movement into linear motion for controlled fluid dispensing
Implementation Method 2
a first gear comprising first gear exterior teeth, the first gear disposed within the interior of the housing, the first gear exterior teeth in mechanical communication with the scroll wheel interior teeth
Implementation Method 3
the plunger is configured to compress the fluid, wherein the compression of fluid is configured to drive the fluid from a cartridge trip disposed atop the cartridge
Data Source
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AI summary
A fluid dispenser comprising: a housing; a cartridge enclosing a fluid; a scroll wheel comprising: a first portion disposed within an interior of the housing, a second portion partially protruding from the housing, and scroll wheel interior teeth; a first gear comprising first gear exterior teeth, the first gear disposed within the interior of the housing, the first gear exterior teeth in mechanical communication with the scroll wheel interior teeth; a plunger comprising plunger exterior teeth in mechanical communication with the first gear exterior teeth, the plunger in fluid communication with the cartridge, the plunger further comprising a plunger slot, wherein the scroll wheel traverses the plunger slot, wherein the plunger is configured to move within the housing and the cartridge, wherein the plunger is configured to compress the fluid, wherein the compression of fluid is configured to drive the fluid from a cartridge trip disposed atop the cartridge.