Toner Refill Cartridge Plunger Position Detection
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Solution Overview
Problem
Current image forming apparatuses face challenges in efficiently refilling toner in developing cartridges, leading to interruptions in printing operations and potential waste due to the lack of precise toner refill mechanisms.
Innovation Solution
The integration of a toner refill cartridge with a toner injection amount detector, which uses a plunger and switches to detect the degree of toner injection and communicate this information to the image forming apparatus, allowing for accurate refilling and minimizing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual toner refilling is performed without detection mechanisms, then the refilling operation is simple and device complexity is low, but the toner injection amount cannot be precisely controlled leading to waste and interrupted printing operations
Solution Approach 1:
The patent replaces complex mechanical measurement mechanisms with an electrical detection system. The toner injection amount detector uses electrical switches and signal processing to detect plunger position and calculate toner injection amount, substituting potential mechanical measurement devices with a more compact electrical sensing system that achieves precise measurement without mechanical complexity.
Solution Approach 2:
The patent introduces a detector as an intermediary component between the toner refill cartridge and the image forming apparatus. This detector includes a plunger that moves with toner injection, switches that detect plunger position, and a processor that calculates injection amount. The intermediary translates physical toner injection into electrical signals for precise measurement and control.
2Productivity
If toner refilling is performed without accurate detection, then the refilling process is fast and simple, but printing operations are interrupted and toner waste occurs
Solution Approach 1:
The patent implements a feedback system where the toner injection amount detector continuously monitors plunger position during refilling and provides real-time signals to the image forming apparatus. The processor calculates the injection amount based on detected positions and communicates this information back to the control unit, enabling the system to determine when refilling is complete and resume printing operations without interruption or waste.
3Measurement precision
If no toner injection detection is implemented, then the toner refill cartridge structure is simple, but the filling degree cannot be accurately determined leading to suboptimal toner usage
Solution Approach 1:
The patent segments the detection function into distinct components: a plunger that divides the detection range into multiple positions, multiple switches positioned at different locations to detect specific plunger positions, and a processor that segments the calculation of injection amount based on sequential position detection. This segmentation enables accurate filling degree measurement through discrete position sensing rather than requiring a complex continuous measurement system.
Data Source
AI summary
An example toner refill cartridge includes a body to accommodate toner, a plunger inserted into the body and movably coupled to the body in a longitudinal direction of the body, and capable of pushing the toner out of the body, a toner injection amount detector to detect each of a plurality of movement positions of the plunger in accordance with the movement of the plunger, and a connection interface to connect to an image forming apparatus to transmit a signal corresponding to each of the detected movement position to the image forming apparatus.