Toner Transport Optical Sensor for Rapid Depletion Detection
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Solution Overview
Problem
Existing toner transport systems in image forming apparatuses, such as printers and copiers, take a significant amount of time to determine when a developer container is empty, leading to inefficient toner resupply and potential image quality issues.
Innovation Solution
A toner transport apparatus with a pump and optical sensor system that quickly detects the presence of toner by using light-transmissive members to create an optical path through which toner is ejected from the storage unit, allowing for immediate detection of toner depletion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an optical sensor detects toner presence at a predetermined height within the storage unit, then the system can monitor toner levels, but it cannot quickly determine when the developer container is empty because toner remains in the storage unit after the container is depleted
Solution Approach 1:
The system divides the toner detection function into two separate locations: the storage unit (hopper) and the developer container. By placing optical sensors at both locations, the system can independently monitor toner levels in each location, allowing quick detection when the container is empty even though the storage unit still contains toner.
Solution Approach 2:
The patent introduces a transport path with optical sensors that act as intermediaries to detect toner presence in the container. These sensors monitor the toner flow from the storage unit through the transport path to the developing apparatus, providing indirect but timely information about container status without requiring direct measurement in the storage unit.
2Reliability
If toner is continuously stored in the storage unit to ensure stable supply, then the transport mechanism can operate reliably, but the system cannot quickly identify when the developer container needs replacement
Solution Approach 1:
The system performs preliminary detection of toner levels in the container before complete depletion occurs. Optical sensors monitor the container status in advance, allowing the system to prepare for container replacement while maintaining continuous stable supply from the storage unit, thus preventing both supply interruption and delayed detection.
Solution Approach 2:
The patent implements a feedback mechanism where optical sensors continuously monitor toner levels in both the storage unit and container, and this information is fed back to the control system. This allows real-time awareness of container status while maintaining reliable supply, enabling timely replacement decisions without affecting supply stability.
3Ease of operation
If the optical sensor is positioned to detect toner in the storage unit, then toner level monitoring is achieved, but the detection location does not reflect the actual container status
Solution Approach 1:
The detection system is segmented into two independent monitoring zones: one in the storage unit and one in the container/transport path. Each sensor monitors its local zone, providing accurate information specific to that location. This segmentation allows the system to maintain easy monitoring operation while achieving precise container status detection through the separate container sensor.
Solution Approach 2:
The patent adds another detection dimension by placing sensors in multiple locations (storage unit and container/transport path) rather than relying on a single detection point. This multi-dimensional monitoring approach ensures that operation ease is maintained through continuous monitoring while measurement precision for container status is improved through the additional detection location in the transport path.
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 rapid determination of toner depletion, facilitating timely resupply and maintaining consistent image quality by ensuring prompt notification of empty toner containers.
Implementation Method 1
an optical sensor unit that is disposed in a passage area through which the toner output by the pump from the ejection port to the transport path unit passes, the optical sensor unit detecting whether or not toner is present
Data Source
AI summary
A toner transport apparatus includes a toner, a transport container having a transport path for transporting the toner toward the developing apparatus, and a pipe through which the toner is transported from the toner container to the transport container, with the pipe having an outlet hole from which the toner is discharged into the transport container. An air pump transports the toner from the toner container to the transport container, and an optical sensor includes a light-emitting element to emit a light and a light-receiving element to receive the light so that an optical path from the light-emitting element to the light-receiving element intersects with a passage area of the toner through which the toner passes after being discharged from the outlet hole of the pipe and before landing at a landing point of the transport container.