Toner Remaining Rate Estimation in Image Forming Apparatus
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Solution Overview
Problem
Current image forming apparatuses lack an efficient method to estimate the remaining toner rate in development cartridges, leading to potential toner exhaustion and inefficient refilling processes.
Innovation Solution
The apparatus includes a toner refilling portion integrated with the development cartridge, allowing for refilling without detachment, and utilizes a controller connected to a sensor to estimate the toner remaining rate using equations that calculate the consumption and refill capacities, adjusting the toner remaining rate based on detected toner levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If toner remaining rate estimation is not implemented, then the apparatus operates without monitoring toner levels, but toner exhaustion occurs leading to interrupted operation and waste
Solution Approach 1:
The controller receives detection results from the sensor about toner remaining amount and uses this feedback to estimate the toner remaining rate. This closed-loop feedback mechanism allows the system to continuously monitor and respond to toner levels, enabling timely refilling decisions and preventing toner exhaustion that would interrupt operation
Solution Approach 2:
The patent replaces manual toner level checking with an automated sensor-based detection system. The sensor automatically detects toner remaining amount, and the controller automatically estimates the remaining rate, substituting mechanical/manual monitoring with an automated electromechanical system that provides continuous reliable monitoring
2Ease of manufacture
If toner refilling requires detachment of development cartridge, then refilling can be performed, but operation time is lost and complexity increases
Solution Approach 1:
The toner refilling portion is pre-integrated into the development cartridge structure, allowing refilling to be performed without detachment. This preliminary integration of the refilling mechanism into the cartridge design enables users to refill toner while the cartridge remains installed, eliminating the time loss and operational interruption that would occur with detachment-required systems
Solution Approach 2:
The patent merges the toner refilling function with the development cartridge by providing a toner refilling portion integrated into the cartridge structure. This consolidation allows the refilling operation to occur in-situ without requiring separation of components, streamlining the refilling process and maintaining continuous operation
3Productivity
If toner refilling is performed without accurate estimation, then refilling can be done quickly, but toner waste occurs due to overfilling
Solution Approach 1:
The sensor provides real-time feedback on toner remaining amount, and the controller uses this feedback to calculate the exact amount of toner needed to reach full capacity. This feedback-based calculation prevents overfilling by determining the precise refill quantity required, eliminating toner waste while maintaining efficient refilling operations
Solution Approach 2:
The system changes the parameter from fixed-volume refilling to dynamic volume calculation based on actual toner remaining amount. By calculating refill quantity as (full capacity - current amount), the system adapts the refilling parameter to the actual state of the cartridge, preventing waste from overfilling while maintaining high refilling efficiency
Data Source
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AI summary
An image forming apparatus includes a body on which a development cartridge is mountable to form a toner image by supplying toner in the development cartridge to an electrostatic latent image formed, a communicating portion provided on an outer surface of the body to be coupled with a toner refill cartridge to form a connection with the development cartridge to perform a toner refill of the toner in the development cartridge through the connection with the development cartridge, a sensor to detect a remaining toner amount remaining in the development cartridge, and a controller to estimate, based on the sensor detecting the remaining toner amount, an estimated toner remaining rate of the development cartridge, which is an estimated rate of the toner remaining in the development cartridge based on toner consumption, according to the toner refill.