Sanitizer-Dispensing Door Handle with Integrated Usage Tracking
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Solution Overview
Problem
Existing methods for preventing the spread of infectious diseases in healthcare and other environments are limited, particularly in tracking hand sanitization rates and preventing nosocomial infections, as they often result in sanitizer spillage and lack timely feedback on usage.
Innovation Solution
A sanitizer-dispensing door handle with integrated electronics that monitor and record hand sanitization events and door openings, featuring a collapsible pump and ergonomic design to ensure sanitizer is dispensed into the palm without spilling, and data transmission for infection control analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sanitizer is dispensed via traditional dispensers, then hand sanitization is achieved, but sanitizer spillage onto the floor occurs
Solution Approach 1:
The dispenser is integrated into the door handle structure, changing the spatial dimension and location of sanitizer dispensing. The nozzle is positioned to dispense sanitizer directly into the user's hand as they grip the handle, rather than requiring manual activation at a separate dispenser location. This dimensional repositioning eliminates spillage by ensuring precise target delivery.
Solution Approach 2:
The system automatically detects when a user grips the door handle and autonomously dispenses the appropriate amount of sanitizer without requiring manual activation. The capacitive sensor detects the user's presence and the microcontroller controls the pump to deliver sanitizer directly into the user's hand, making the sanitization process self-serving and eliminating user error-related spillage.
2Loss of information
If hand sanitization monitoring is implemented, then infection control data is obtained, but device complexity increases
Solution Approach 1:
The door handle is designed to perform multiple functions: mechanical door operation, sanitizer dispensing, user detection via capacitive sensing, and data logging. By integrating these diverse functions into a single multi-functional device, the system reduces the need for separate monitoring equipment while comprehensive tracking capabilities are achieved through the embedded microcontroller and sensor array.
Solution Approach 2:
The monitoring electronics, capacitive sensors, pump control, and data storage capabilities are merged into the door handle assembly. The microcontroller serves as a central hub that coordinates sanitizer dispensing based on sensor input and simultaneously logs all interactions to USB flash drives, combining what would traditionally be separate systems into one integrated unit.
3Productivity
If sanitizer dispensing is automated via door handle, then hand sanitization compliance is improved, but manufacturing complexity increases
Solution Approach 1:
The dispenser system is divided into modular components: a reusable door handle housing containing the electronics and sensor, replaceable sanitizer cartridges with integrated pumps, and removable USB flash drives for data storage. This segmentation allows each component to be manufactured and tested independently, then assembled into the complete system, reducing overall manufacturing complexity while maintaining advanced functionality.
Solution Approach 2:
The system uses a collapsible pump mechanism that changes from an extended to a compressed state during operation, and a nozzle that transitions from a covered to an exposed position. These parameter changes are controlled by the microcontroller based on sensor input, enabling automated dispensing without requiring complex mechanical linkages or manual intervention, thereby improving compliance while managing manufacturing complexity.
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
Effectively promotes hand sanitization by ensuring sanitizer is applied correctly and provides actionable data for improving infection control measures, reducing the risk of nosocomial infections and optimizing sanitizer usage.
Implementation Method 1
The sensing circuit(s) is comprised of, for example, a conductive material that emits an electrical field
Implementation Method 2
a collapsible pump filled with hand sanitizer; and a compressible trigger piece that compresses the collapsible pump and releases hand sanitizer
Data Source
AI summary
Apparatus and methods for dispensing sanitizer fluid via handles on doors and equipment, and data and recording events pertaining to hand sanitization, are disclosed.