Developing Roller Gear-Clutch Layout for Timed Toner Supply
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Solution Overview
Problem
Existing image forming apparatuses cannot rotate the developing roller in the same direction when the coupling is rotated clockwise or counterclockwise, and toner supply is limited to only one direction, necessitating a device that can rotate the developing roller in both directions and supply toner with precise timing using the coupling operation.
Innovation Solution
A developing device with a coupling that allows the developing roller to rotate in the same direction regardless of the coupling's rotation direction, incorporating a gear system and clutch mechanism to ensure consistent rotation and toner supply, controlled by a controller that adjusts the motor's direction based on toner levels for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the coupling is rotated clockwise or counterclockwise to drive the developing roller, then the developing roller can be rotated, but the developing roller cannot rotate in the same direction in both cases
Solution Approach 1:
The patent applies the inversion principle by using a clutch mechanism that disengages the direct connection between the coupling's rotation and the developing roller's rotation. When the coupling rotates clockwise or counterclockwise, the clutch allows the developing roller to always rotate in the same direction (counterclockwise) by decoupling the direct transmission path and using a fixed rotation direction mechanism.
Solution Approach 2:
The patent introduces a clutch as an intermediary component between the coupling and the developing roller. This clutch mechanism mediates the transmission of rotational force, allowing the system to convert bidirectional coupling rotation into unidirectional developing roller rotation, thus resolving the contradiction between adaptability and consistency.
2Extent of automation
If additional components like levers are added to supply toner, then toner supply control is achieved, but the device complexity increases
Solution Approach 1:
The patent applies the multi-functionality principle by designing the coupling to perform multiple functions: it not only drives the developing roller but also controls toner supply timing. By integrating the toner supply control function into the existing coupling mechanism, the system achieves automated toner supply without adding separate control components like levers, thus reducing device complexity while maintaining automation.
Solution Approach 2:
The patent merges the toner supply control function with the coupling's rotation function. The coupling's rotational movement is used to trigger both the developing roller rotation and the toner supply timing simultaneously, eliminating the need for separate control mechanisms and reducing overall device 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 device ensures consistent developing roller rotation in both directions, reduces toner leakage, and supplies toner with precise timing, eliminating the need for additional components like levers, thereby enhancing the apparatus's efficiency and reducing its size.
Implementation Method 1
incorporating a gear system and clutch mechanism to ensure consistent rotation
Implementation Method 2
incorporating a gear system and clutch mechanism to ensure consistent rotation
Data Source
AI summary
A developing device may include an auger or an agitator that is capable of supplying toner in a toner accommodation chamber to a developing chamber and is rotatable about an auger axis extending in an axial direction, a transporting gear that is rotatable together with the auger or the agitator, and a moving gear that is in mesh with a coupling gear and is rotatable both counterclockwise and clockwise. The moving gear is movable while being in mesh with the coupling gear between a first position where the moving gear is in mesh with the transporting gear and a second position where the moving gear is out of mesh with the transporting gear. The moving gear moves to the first position when the coupling gear rotates counterclockwise and to the second position when the coupling gear rotates clockwise.