Automatic paper towel dispenser
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Solution Overview
Problem
Existing paper towel dispensers lack the ability to vertically dispense paper towels without contamination from the environment and do not require a fixed anchor for functionality.
Innovation Solution
An automatic paper towel dispenser with a housing featuring a moveable front wall, pulley system, and reversible motor-controlled roller, powered by a rechargeable battery, allowing for vertical loading and dispensing without external anchoring, and incorporating sensors and a display for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a fixed anchor is used to secure the dispenser, then stability is improved, but installation complexity and requirement for permanent mounting increases
Solution Approach 1:
The dispenser uses its own weight and internal components (counterweight mechanism, tension rollers) to maintain stability without requiring external anchoring. The system serves itself by using the paper towel roll and counterweight arrangement to create automatic balance and positioning.
Solution Approach 2:
The dispenser employs dynamic elements such as movable rollers, adjustable tension mechanisms, and a counterweight system that adapts to different loading conditions. This allows the dispenser to maintain stability through dynamic balance rather than fixed anchoring.
2Object-affected harmful factors
If paper towels are stored in a closed housing, then contamination protection is improved, but accessibility for loading and dispensing becomes more difficult
Solution Approach 1:
The housing is segmented into accessible sections with open sides that allow loading and dispensing operations. The front wall and side panels are designed to be open or removable, creating separate access zones while maintaining enclosed protection for the paper towel storage area.
Solution Approach 2:
Rollers and guides act as intermediary elements that facilitate paper towel access through the housing structure. These components allow the paper towel to be fed in and dispensed out while maintaining the protective enclosure, serving as mediators between the closed housing and external access requirements.
3Volume of moving object
If a vertical dispensing mechanism is implemented, then space efficiency is improved, but mechanical complexity increases
Solution Approach 1:
The vertical dispensing system uses gravity as the primary driving force, with the paper towel roll positioned to feed naturally downward. The counterweight mechanism balances the system, allowing vertical motion without requiring complex motors or actuators, thus achieving space efficiency with minimal mechanical complexity.
Solution Approach 2:
The system employs tension rollers and friction-based grip mechanisms that use rotational force and friction to control paper towel movement vertically. This mechanical approach using simple rollers and tension control achieves vertical dispensing without complex pneumatic or hydraulic systems.
4Productivity
If automatic dispensing is implemented using motors and sensors, then productivity is improved, but device complexity and energy consumption increase
Solution Approach 1:
The automatic dispensing system uses sensors that detect paper towel presence and user presence, then automatically activates the motor to dispense the appropriate amount. The system serves itself by monitoring its own state and responding autonomously, reducing the need for complex control logic while maintaining automation.
Solution Approach 2:
The dispensing system incorporates feedback mechanisms where sensors detect the paper towel roll level, user presence, and dispensing status. This feedback information is used by the controller to automatically control the motor, ensuring proper dispensing operation without requiring complex manual control systems.
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 efficient, contamination-free vertical dispensing of paper towels without the need for a fixed anchor, ensuring easy loading and reliable operation.
Implementation Method 1
A rechargeable battery is connected to the controller and serves to power the controller, the first motor and the second motor.
Implementation Method 2
The plate is moved using a pulley system that that is connected to a first motor that is controlled by a controller.
Implementation Method 3
A second motor is attached to the base of the housing at a position that is at a front corner of the base and a roller is mounted on the second motor, the motor is a reversible motor that controls the clockwise and counterclockwise spin of the roller
Data Source
AI summary
A vertical paper towel dispenser that comprises a housing that has a moveable front wall. The moveable front wall is mounted on a plate that moves inward and outward from the housing. The plate is moved using a pulley system that that is connected to a first motor that is controlled by a controller. The plate is mounted on a plate holder that is secured to a pulley of the pulley system. The plate has a front vertical tension roller that is positioned at a front corner of the plate, and a central post that is positioned at a central position of the plate. A second motor is attached to the base of the housing at a position that is at a front corner of the base and a roller is mounted on the second motor. The second motor is controlled by the controller. A rechargeable battery powers the dispenser.