Sensor-Triggered Toilet Tissue Dispenser to Reduce Paper Waste
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Solution Overview
Problem
Conventional toilet paper dispensers often result in excessive paper waste, are difficult to refill, and can be challenging for elderly or disabled individuals due to complex operation and hidden roll placement, making it hard to determine when a new roll is needed.
Innovation Solution
A recessed, wall-mounted electronic toilet tissue dispenser with a motion sensor that automatically dispenses a predetermined amount of tissue, featuring opposing tracks for easy access, a digital display for remaining sheets, and a constant power source, allowing hands-free operation and simple refilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a freewheeling design is used for toilet paper dispensing, then the dispenser is simple to manufacture and operate, but it results in accidental over-dispensing and waste of toilet paper
Solution Approach 1:
The patent replaces the traditional mechanical freewheeling dispenser mechanism with an electric motor-driven system. The motor-controlled spool precisely controls the dispensing of toilet paper, eliminating the uncontrolled freewheeling motion that causes over-dispensing and waste. This substitution of mechanical system with an electromechanical system resolves the contradiction between simplicity and waste prevention.
2Shape
If the toilet paper roll is contained within a closed dispenser housing, then the dispenser appearance is neat and compact, but it becomes difficult to determine when the roll is nearly expended and difficult to refill
Solution Approach 1:
The patent employs a nested structure where the toilet paper roll is placed inside a removable tray, which in turn is inserted into the main dispenser housing. This nested design allows the user to easily remove the entire tray assembly to replace the roll, maintaining a compact exterior while providing simple access for refilling and monitoring. The nested structure resolves the contradiction between compact appearance and ease of operation.
3Device complexity
If conventional manual dispensing is used, then the dispenser structure is simple, but elderly or disabled persons with reduced manual dexterity find it difficult to operate
Solution Approach 1:
The patent implements automatic sensing technology that detects when a user needs toilet paper and automatically dispenses the appropriate amount without requiring manual manipulation. The sensor-triggered automatic dispensing mechanism eliminates the need for users to manually pull, tear, or manipulate the toilet paper, making the system accessible to elderly or disabled persons while maintaining structural simplicity through automated functions.
4Loss of substance
If an electric motor is added to control toilet paper dispensing, then over-dispensing and waste are prevented, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces the simple mechanical freewheeling mechanism with an electric motor-driven spool system. This substitution enables precise control over toilet paper dispensing through motor control, preventing over-dispensing and waste. Although this increases device complexity, it effectively resolves the waste problem by eliminating the uncontrolled mechanical dispensing inherent in simpler designs.
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 solution reduces paper waste, simplifies operation and refilling, and provides clear indication of when the roll is low, making it accessible and user-friendly for all, including those with reduced dexterity.
Implementation Method 1
a motion sensor which actuates a drive roller to dispense a predetermined amount of the toilet tissue
Implementation Method 2
The drive arm provides a spring-loaded force against the drive roller and a lower portion of the roll of toilet tissue, causing the roll of toilet tissue to rotate
Implementation Method 3
The tissue roll is retained on a common spring-loaded cylindrical tissue roll holder within the housing
Data Source
AI summary
A toilet tissue dispensing apparatus which automatically dispenses a predetermined length of toilet tissue is herein described. A toilet tissue roll is contained within an enclosure and is fed from a front panel through a small slot. A motion sensor detects a user's hand and automatically initiates the feeding of the tissue. A digital readout displays an approximate number of sheets remaining on the roll. When a pre-determined minimum number of sheets are left, the digital display begins to flash, thereby indicating the need to replenish the tissue. The dispenser is installed in a recessed manner within a bathroom wall capable of being accessed in a drawer-like manner for tissue roll replacement.