Roll Holder Paper Sensor With Self-Powered Wireless Signaling
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Solution Overview
Problem
Existing printing apparatuses require a physical electric cable connection between the roll holder and the printing device for the paper sensor to function, which is inconvenient and limits mobility.
Innovation Solution
A wireless connection device utilizing a magnet on the roll holder that performs a cyclical motion to generate electrical energy, enabling wireless communication with a receiver to count revolutions and signal paper end-of-roll situations without a battery power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a physical electric cable connection is used between the roll holder and the printing device, then the paper sensor can function reliably, but the device complexity increases and mobility is limited
Solution Approach 1:
The patent replaces the mechanical cable connection system with a wireless electromagnetic communication system. The paper sensor on the roll holder communicates with the printing device through radio frequency signals, eliminating the need for physical cable connections while maintaining reliable operation.
Solution Approach 2:
The patent introduces an intermediary wireless communication system between the roll holder and printing device. Instead of direct cable connection, electromagnetic waves serve as the intermediary medium to transmit sensor data and power information, enabling cable-free operation.
2Ease of operation
If a battery power supply is used for the roll holder, then wireless communication is enabled, but the device complexity and cost increase
Solution Approach 1:
The patent implements a self-service power system where the roll holder generates its own power through electromagnetic induction. The motion of the roll holder itself induces current in a coil, creating electrical energy that powers the wireless transmitter without requiring external battery supplies.
Solution Approach 2:
The patent utilizes the periodic motion of the roll holder during paper feeding to generate electrical energy. Each rotation or movement cycle of the roll holder induces a corresponding electrical pulse in the coil, creating periodic energy generation that accumulates to power the wireless communication system.
3Reliability
If a cable connection is used for the paper sensor, then power and data transmission are reliable, but the ease of operation and installation are reduced
Solution Approach 1:
The patent replaces the mechanical cable-based power and data transmission system with an electromagnetic wireless transmission system. The roll holder's motion generates electromagnetic signals that carry both power and data information to the printing device, eliminating cables and improving installation ease and mobility.
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 wireless communication for paper presence and reserve detection, eliminating the need for a physical cable connection and providing a cost-effective, efficient paper sensor solution.
Implementation Method 1
a coil which is energized by the mechanical energy of the magnet in fall to supply electrical energy
Implementation Method 2
a gravity drop of the magnet which falls in proximity to a coil which is energized by the mechanical energy of the magnet in fall
Data Source
AI summary
A device and a method for making a wireless connection between a paper sensor in a roll holder and a printing device which receives a printing medium from the roll holder, in which a magnet arranged on the roll holder performs, with each turn of the pin of the roll holder, a cyclical movement which includes first a lifting of the magnet, caused by a rotation of the pin by a fraction of a turn, and then a fall by gravity of the magnet which falls near a coil which is energized by the mechanical energy of the magnet for supplying electrical energy to an emitter in wireless communication with a receiver to receive a signal with each revolution of the pin to count the revolutions made by the pin and act as a paper sensor.