Rotating Toner Level Detector with Dynamic Cleaning
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Solution Overview
Problem
Conventional toner level detection methods face issues with accurate detection due to the need for precise installation and manufacturing tolerances, leading to incomplete toner circulation and interference with reflective surfaces, which affects detection reliability and efficiency.
Innovation Solution
A reflective toner level detector with relative rotating and cleaning, where a reflective region and a first cleaner are disposed on a rotating agitator, and a second cleaner is on the toner cartridge, allowing for effective cleaning and detection of toner levels using a transceiver, with the light-permeable and reflective regions positioned on opposite sides for improved signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed reflective surface and extension are disposed at the bottom of the toner cartridge chamber, then low toner detection function is achieved, but the toner circulation is obstructed and detection reliability is affected
Solution Approach 1:
The reflective surface is changed from a fixed structure to a rotating structure that moves with the agitator. This dynamic configuration allows the reflective surface to rotate away from the optical path when not needed, eliminating obstruction to toner circulation while maintaining detection functionality when required.
Solution Approach 2:
The reflective surface operates in periodic cycles: rotating into position for detection, remaining stationary for signal transmission, and rotating away to allow toner circulation. This periodic action resolves the contradiction by providing detection reliability only when needed while maintaining continuous toner circulation efficiency.
2Ease of manufacture
If a single cleaner is disposed on the rotating blade to clean both the transparent window and reflective surface, then cleaning function is achieved, but installation and manufacturing tolerances must be precisely controlled
Solution Approach 1:
The cleaning function is divided into two separate cleaners: one cleaner on the rotating blade for the transparent window, and another cleaner on the chamber wall for the reflective surface. This segmentation eliminates the need for precise positioning of a single cleaner to handle both surfaces, as each cleaner independently services its designated surface.
Solution Approach 2:
The rotating blade with its cleaner automatically services the transparent window during rotation, while the stationary cleaner on the chamber wall services the reflective surface. This self-service arrangement simplifies installation and reduces manufacturing precision requirements by distributing cleaning responsibilities across multiple independent components.
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
This solution enables accurate and timely notification for toner replacement, reduces electronic components and assembly time, and provides more precise toner level determination compared to existing methods, while preventing toner agitation that could shorten its lifespan.
Implementation Method 1
outputs an emitting signal to the reflective region through the light-permeable region, and the reflective region reflects the emitting signal to generate a reflective signal received by the transceiver
Data Source
AI summary
A toner level detector, includes: a toner cartridge storing toner and having one side provided with a light-permeable region; an agitator, which is rotatably disposed in the toner cartridge and agitates the toner; a reflective region disposed on an inner surface on the other side of the toner cartridge; a first cleaner disposed on one side of the agitator; a second cleaner disposed on the other side of the agitator; and a transceiver, which is disposed on a body outside the toner cartridge, and outputs an emitting signal to the reflective region through the light-permeable region, wherein the reflective region reflects the emitting signal to generate a reflective signal received by the transceiver through the reflective region, wherein the first cleaner, which is rotating, intermittently cleans the light-permeable region, which is fixed; and the second cleaner, which is rotating, intermittently cleans the reflective region, which is fixed.