Detection Gear Light-Transmission Cutouts for Optical Position Sensing
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Solution Overview
Problem
Toner cartridges face challenges in allowing detection gear movement to be detected by image-forming apparatuses when the cartridge casing is positioned between light-emitting and light-receiving elements.
Innovation Solution
The toner cartridge design includes a detection gear that rotates from a first to a second position, featuring a through-hole or cutout at the first position and a light-transmission or light-blocking portion at the second position, enabling detection even when the casing obstructs the light path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detection gear is positioned between the light-emitting element and light-receiving element for detection, then detection accuracy is improved, but the casing cannot be positioned between the light elements without blocking the light path
Solution Approach 1:
The patent introduces light-transmitting portions in the detection gear and corresponding light-receiving openings in the casing as intermediary elements. These intermediaries allow light to pass through specific paths: when the light-transmitting portion aligns with the light-receiving opening, light reaches the light-receiving element to indicate a specific gear position. This mediator approach enables both accurate detection and flexible casing positioning between the light elements.
Solution Approach 2:
The detection gear is segmented into light-transmitting portions and light-blocking portions, allowing different segments to perform different functions. The light-transmitting segments enable light passage for detection while the blocking segments provide mechanical detection features. This segmentation allows the gear to simultaneously fulfill detection accuracy requirements and accommodate various casing positions.
2Stability of the object's composition
If the casing is positioned between the light-emitting element and light-receiving element for structural reasons, then structural stability is improved, but light transmission for detection is blocked
Solution Approach 1:
The patent uses light-transmitting portions and light-receiving openings as intermediaries to create dedicated light transmission channels through the casing structure. These intermediaries allow the casing to maintain its stable position between the light elements while still permitting light to pass through the detection gear to reach the sensor, preventing information loss.
Solution Approach 2:
The casing is designed with localized light-receiving openings at specific positions rather than being completely opaque. This local quality modification allows light transmission at critical detection points while maintaining overall structural stability and protection of internal components.
3Measurement precision
If the detection gear uses a through-hole or cutout for light transmission, then detection capability is improved, but the gear structure becomes more complex
Solution Approach 1:
The patent merges the detection gear structure with the light-transmitting portions and cutouts, integrating multiple functions into a single component. The gear teeth provide mechanical detection while the light-transmitting portions provide optical detection, combining both functions in one unified structure rather than separate components.
Solution Approach 2:
The detection gear is designed with multi-functionality: it serves both as a mechanical transmission component (gear teeth for rotation and engagement) and as an optical detection component (light-transmitting portions and cutouts for light-based position detection). This universal design reduces overall system complexity by eliminating the need for separate detection mechanisms.
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 design ensures the detection gear can be accurately detected by the image-forming apparatus, allowing for proper toner cartridge information reading and status determination, even when the cartridge is attached in configurations where the casing is between the light-emitting and light-receiving elements.
Implementation Method 1
a light-emitting element of the image-forming apparatus and a light-receiving element of the image-forming apparatus
Implementation Method 2
the one of the through-hole and the cutout of the detection gear is positioned farther away from the auger than an outer surface of another end portion of the casing in the second direction is from the auger in the second direction
Implementation Method 3
an outer surface of a portion of the detection gear different from the one of the through-hole and the cutout is positioned farther away from the auger than the outer surface of the another end portion of the casing in the second direction is from the auger in the second direction
Data Source
AI summary
A toner cartridge includes a casing, an auger rotatable about an axis extending in a first direction, an auger gear rotatable with the auger, an agitator aligned with the auger in a second direction, an agitator gear rotatable with the agitator, and a detection gear positioned opposite to the auger gear with respect to the agitator gear in the second direction. The detection gear is rotatable from a first position to a second position. At the first position, a through-hole or a cutout of the detection gear is positioned farther away from the auger than an outer surface of another end portion of the casing in the second direction is. At the second position, a portion of the detection gear different from the through-hole or the cutout is positioned farther away from the auger than the outer surface of the another end portion of the casing is.