Cover-Mounted Sensor for Developer Level Detection
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Solution Overview
Problem
Conventional image forming apparatuses with developer storage containers face challenges in accurately detecting and managing developer levels, leading to inefficient replenishment and potential waste, as existing detection methods are not always reliable and require additional sensors.
Innovation Solution
The image forming apparatus incorporates a developer storage container with a moving wall and a sensor unit mounted on a cover member that changes posture to enable detection of developer levels, allowing for controlled movement of the moving wall based on sensor output signals, thereby optimizing developer replenishment without the need for additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a detection sensor is added to detect developer levels in the storage container, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The cover member is designed to perform multiple functions: it serves as both a structural component that closes the opening and as a mounting platform for the detection sensor. By integrating the sensor mounting function into the cover member, the patent avoids adding separate sensor housings or additional structural elements, thereby improving measurement precision without significantly increasing device complexity
Solution Approach 2:
The detection sensor and its mounting structure are merged into a single integrated sensor unit that is attached to the cover member. This consolidation eliminates the need for separate sensor housings and reduces the number of discrete components, resolving the contradiction between achieving accurate developer level detection and maintaining simple device structure
2Measurement precision
If the sensor unit is fixed in position to detect developer levels, then measurement precision is improved, but adaptability decreases
Solution Approach 1:
The sensor unit is designed with movable mounting that allows it to be repositioned along the cover member or adjusted to different detection locations. This dynamic positioning capability enables the sensor to adapt to different developer levels and container configurations while maintaining accurate detection, thus resolving the contradiction between fixed precision measurement and adaptability
3Measurement precision
If additional sensors are added to improve developer level detection, then measurement precision is improved, but loss of substance increases
Solution Approach 1:
The detection sensor provides real-time feedback on developer levels in the storage container to the control system. This feedback mechanism enables precise monitoring and timely replenishment notifications, allowing the system to maintain optimal developer levels and prevent both over-consumption and waste, thereby improving measurement precision while reducing substance loss
Data Source
AI summary
An image forming apparatus includes a housing in which a developing device is disposed, a cover member attached to the housing, a developer storage container to be detachably attached to the developing device, and a sensor unit. The developer storage container includes a container body having a storage space for storing a developer and a developer discharge port, and a moving wall configured to move in the container body. The sensor unit is arranged at a detection position where a detection sensor faces a specific area located above the developer discharge port on an outer peripheral surface of the container body when the cover member is in a closing posture, and arranged at a detection disable position where the detection sensor is distant from the specific area when the cover member is in an opening posture.