Developing Roller Moving Mechanism Design Flexibility
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Solution Overview
Problem
The existing design of image forming apparatuses, which include both a moving mechanism and a clutch mechanism below a photosensitive drum, limits flexibility and hinders design development, particularly when switching between monochrome and color printing modes.
Innovation Solution
The apparatus includes a first and second photosensitive drum with corresponding developing rollers, an electric motor, a moving mechanism, a transmission mechanism, and a connecting mechanism. The moving mechanism moves the second developing roller between development and retracted positions, while the transmission mechanism switches between transmission and cut-off states, allowing for increased design flexibility by spacing these components relative to the plane including the axes of the first and second photosensitive drums.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both the moving mechanism and clutch mechanism are disposed below the photosensitive drum, then the structure is compact, but the degree of flexibility in design becomes small and design development is hindered
Solution Approach 1:
The patent applies dimensionality change by moving the clutch mechanism from the conventional position below the photosensitive drum to the opposite side. This spatial reconfiguration in a different dimension (from below to above/across the drum plane) resolves the contradiction by providing design flexibility without increasing overall structural complexity, as the new arrangement utilizes available space in a different spatial dimension.
2Adaptability or versatility
If the moving mechanism and clutch mechanism are spaced apart relative to the plane including the axes of the photosensitive drums, then design flexibility is increased, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by separating the moving mechanism and clutch mechanism into distinct spatial locations - the moving mechanism remains on one side of the photosensitive drum while the clutch mechanism is positioned on the opposite side. This segmentation allows each mechanism to be optimized independently, increasing design flexibility while managing complexity through functional separation rather than integrated arrangement.
Data Source
AI summary
An image forming apparatus includes first and second photosensitive drums, first and second developing rollers configured to supply developers to the first and second photosensitive drums, respectively, an electric motor configured to generate a driving force to rotate the second developing roller, a moving mechanism configured to move the second developing roller between a development position and a retracted position, a transmission mechanism configured to transmit the driving force to the second developing roller, a drive mechanism configured to drive the moving mechanism and the transmission mechanism simultaneously, and a connecting mechanism configured to, when the second developing roller is in the development position, bring the transmission mechanism into a transmission state that allows transmission of the driving force to the second developing roller, and to, when the second developing roller is in the retracted position, bring the transmission mechanism into a cut-off state the cuts off the transmission.