Liquid Medication Dispensing Apparatus with Automated Plunger Drive
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Solution Overview
Problem
Conventional methods for dispensing liquid medications, such as eye drops, often result in inconsistent dosages due to manual squeezing, leading to potential overdosing or underdosing, and patients struggle to accurately monitor medication volume, especially when the bottle is opaque.
Innovation Solution
A medicinal dosing apparatus featuring a housing with a cap, a cartridge assembly that secures a medication bottle, and a control unit that receives signals from a dispensing button and a latch mechanism to drive a plunger within a piston chamber, ensuring a metered volume of medication is dispensed through a nozzle in a controlled manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual squeezing method is used to dispense liquid medication, then the device complexity is reduced, but the manufacturing precision (dosage consistency) deteriorates
Solution Approach 1:
The patent replaces the manual mechanical squeezing action with an automated electromechanical drive system. The drive mechanism includes a motor that actuates a plunger within a piston chamber, which in turn compresses the medication bottle to dispense precise dosages. This substitution eliminates the inconsistency of manual squeezing while maintaining manageable device complexity through integrated control.
Solution Approach 2:
The system incorporates a weight sensor that automatically detects when the medication bottle is empty and triggers a user notification. The control unit automatically controls the drive mechanism based on sensor inputs, allowing the system to service itself by monitoring medication levels and initiating dispensing operations without continuous manual intervention.
2Loss of substance
If opaque bottle is used for medication storage, then the loss of substance (medication protection) is improved, but the measurement precision (volume monitoring) deteriorates
Solution Approach 1:
The patent introduces a weight sensor as an intermediary measurement device between the opaque medication bottle and the control system. Instead of requiring visual inspection of the opaque bottle, the weight sensor detects changes in bottle weight to determine medication volume levels. This intermediary provides accurate measurement information despite the opaque container protecting the medication.
Solution Approach 2:
The system replaces visual inspection (optical measurement) with electronic weight sensing to monitor medication volume. The weight sensor converts the physical weight of the medication into electrical signals that the control unit processes to determine remaining volume, enabling accurate monitoring without compromising the protective opaque bottle design.
3Ease of operation
If conventional dropper or squeezable bottle is used, then the ease of operation is improved, but the manufacturing precision (dosage accuracy) deteriorates
Solution Approach 1:
The patent replaces the simple manual dropper or squeezable bottle mechanism with an automated electromechanical dispensing system. The drive mechanism uses a motor-controlled plunger that precisely controls medication flow through a nozzle, delivering accurate dosages. The system maintains ease of operation through a user-friendly interface with buttons for controlling dispensing operations.
Solution Approach 2:
The system incorporates automatic control where the control unit manages the drive mechanism based on sensor inputs and programmed parameters. The weight sensor automatically monitors medication levels and triggers appropriate responses, reducing the need for continuous manual adjustment while maintaining operational simplicity for the end user.
4Manufacturing precision
If automated drive mechanism is added to ensure precise dispensing, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into an integrated cartridge assembly that combines the medication bottle, drive mechanism, weight sensor, and nozzle in a single unified unit. This integration reduces overall system complexity by eliminating the need for separate components and reducing the number of connections and interfaces required in the complete dispensing system.
Solution Approach 2:
The cartridge assembly serves multiple functions simultaneously: it stores the medication, provides the drive mechanism for dispensing, contains the weight sensor for monitoring, and includes the nozzle for delivery. This multi-functionality in a single integrated unit improves dispensing precision while managing device complexity through consolidation rather than addition of separate components.
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
The apparatus provides precise and controlled dispensing of liquid medications, ensuring accurate dosages and reducing waste, while allowing patients to monitor medication levels effectively, even when the bottle is opaque.
Implementation Method 1
The plunger operated between the first position and the second position creates a differential pressure within the piston chamber, which enables extruding of a metered volume of the liquid medication from the nozzle
Data Source
AI summary
Various embodiments of the present disclosure provide a liquid medication dispensing apparatus. The apparatus includes a housing including an inner cavity and a cap operable between an open position and a closed position. A cartridge assembly is configured to be inserted in the inner cavity. The cartridge assembly includes a support structure, a mounting platform, a nozzle base including a nozzle, and an intermediate body portion coupling the support structure and the nozzle base while maintaining a gap therebetween. The apparatus includes a control unit disposed in the housing. The control unit is configured to receive a first signal from a circuitry associated with a dispensing button, upon detection of an input on the dispensing button. Upon receipt of the first signal, the control unit provides a command signal to a drive mechanism for retrieving a liquid medication from a medication bottle and extrude the liquid medication through the nozzle.