Image Forming Device Sensor Cleaning Mechanism
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Solution Overview
Problem
Image forming devices with endless belts and optical sensors face challenges in maintaining detection accuracy due to toner splashes contaminating the detection surface, leading to inconsistent image quality as users may not clean the sensors promptly or correctly.
Innovation Solution
An image forming device with a cleaning unit and interlocking mechanism that automatically cleans the detection sensor surface when the drawer moves between attachment and replacement positions, ensuring the detection surface remains clean and accurate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical sensor is disposed facing the endless belt to detect detection patterns, then detection accuracy is improved, but the detection surface is contaminated by splashed toner leading to lowered detection accuracy
Solution Approach 1:
The patent extracts the harmful factor (toner contamination) from the detection system by introducing a cleaning unit that removes toner from the detection surface. The cleaning unit includes a cleaning member that contacts the detection surface to wipe off toner, thereby separating the detection function from the contamination risk.
Solution Approach 2:
The patent introduces a cleaning unit as an intermediary component between the detection sensor and the toner contamination source. This cleaning unit acts as a mediator that periodically removes toner from the detection surface, preventing direct contamination while maintaining the detection function.
2Measurement precision
If users manually clean the detection surface to maintain image quality, then detection accuracy can be maintained, but cleaning timing is uncertain and may not be performed correctly
Solution Approach 1:
The patent implements self-service by enabling the cleaning unit to automatically clean the detection surface without user intervention. The cleaning operation is triggered automatically based on drawer position detection, eliminating the need for users to manually clean the sensor and ensuring consistent maintenance of detection accuracy.
Solution Approach 2:
The patent incorporates feedback through a drawer position detection sensor that monitors the drawer's position and automatically triggers the cleaning operation when the drawer is in the correct position. This feedback mechanism ensures the cleaning is performed at the appropriate time without requiring user judgment or manual initiation.
3Adaptability or versatility
If the drawer is made movable between attachment and replacement positions, then cartridge replacement is enabled, but the cleaning mechanism requires additional interlocking components
Solution Approach 1:
The patent merges the cleaning function with the existing drawer movement mechanism by using the drawer's position as the trigger for cleaning. The cleaning unit is integrated into the drawer assembly, and the cleaning operation is combined with the drawer's natural movement cycles, eliminating the need for separate cleaning initiation mechanisms.
Solution Approach 2:
The drawer movement serves multiple functions: it enables cartridge replacement, positions the cleaning member for operation, and triggers the cleaning sequence. By making the drawer mechanism universal, the patent avoids adding separate dedicated cleaning actuation mechanisms, thereby reducing overall system complexity.
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
The automatic cleaning mechanism maintains high detection accuracy and image quality by ensuring the detection surface is consistently clean, even when users are not actively cleaning it, thereby correcting positional deviations and density issues in toner images.
Implementation Method 1
a detection sensor configured to optically read a detection pattern formed on the endless belt with each recording agent
Implementation Method 2
a cleaning unit including a cleaning surface configured to be able to contact and clean the detection surface of the detection sensor
Data Source
AI summary
An image forming device is provided, which includes an interlocking mechanism that causes a cleaning unit to clean with a cleaning surface thereof a detection surface of a detection sensor for reading each detection pattern formed on an outer surface of a sheet-feeding endless belt, in conjunction with movement of a drawer, which holds a plurality of process cartridges, between an attachment position where a photoconductive drum included in each process cartridge faces an up-facing side of the outer surface of the endless belt and a replacement position where at least one of the process cartridges is outside a main body housing of the image forming device.