Toner Bottle Driving Device Switching for Malfunction Recovery
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Solution Overview
Problem
Conventional image forming apparatuses lack a mechanism to switch to a usable toner bottle driving device when a malfunction occurs in the currently used device, leading to potential printing disruptions.
Innovation Solution
A control device with a malfunction detector, recording material amount setting unit, and main driving device switching unit that detects malfunctions, sets the recording material amount to a predetermined value, and switches to a usable driving device when a non-malfunctioning device with sufficient recording material is available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single main driving device is used to discharge recording material, then the device structure is simple, but the system reliability deteriorates when malfunction occurs
Solution Approach 1:
The system divides the driving device function into multiple independent driving devices (first, second, and subsequent driving devices), each capable of discharging recording material separately. This segmentation allows the system to switch between devices when one malfunctions, resolving the contradiction by maintaining simplicity through modular independence while improving reliability through redundancy.
Solution Approach 2:
The system changes the operational state parameter of driving devices by detecting malfunctions and switching the main driving device designation from one device to another. This parameter change enables the system to adapt to malfunction conditions while maintaining continuous operation, thus improving reliability without significantly increasing structural complexity.
2Productivity
If multiple toner bottles are mounted for continuous printing, then the productivity is improved, but the device complexity increases
Solution Approach 1:
Multiple driving devices are designed with identical or similar structures and functions, making them universally interchangeable. Each driving device can serve as the main driving device when needed, and the system can switch between them based on operational status. This universality enables continuous printing through redundancy while keeping the increase in device complexity manageable through standardization.
3Device complexity
If no malfunction detection mechanism is implemented, then the device complexity is low, but the reliability deteriorates when malfunction occurs
Solution Approach 1:
The control device implements a feedback mechanism by detecting the operational status of each driving device and using this information to determine whether to switch the main driving device designation. This feedback loop enables automatic malfunction response, improving reliability while keeping the control mechanism relatively simple through systematic status monitoring and conditional switching logic.
Data Source
AI summary
A control device drives a main driving device among driving devices each used to discharge recording material from a recording material container. A malfunction detector detects malfunction of the main driving device. When the malfunction detector has detected the malfunction, a recording material amount setting unit sets information indicating an amount of the recording material in the recording material container connected to the main driving device to a first value. A main driving device switching unit stops, when an amount of the recording material in the recording material container connected to the main driving device is the first value, driving the main driving device and then, when the driving devices other than the main driving device include one driving device having a recording material container connected thereto that contains a recording material an amount of which exceeds the first value, switches the main driving device to the one driving device.