Image Reading Device Cover Plate Dust Protection
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Solution Overview
Problem
In image forming systems with inkjet type image forming apparatuses, issues such as ink viscosity leading to ejection failure and ink misplacement cause image defects, and the image reading device's accuracy is compromised due to dust and paper powder accumulation on the glass plate, leading to uneven cleaning and vibration in the cleaning mechanism.
Innovation Solution
An image reading device with a moving mechanism that positions the reading sensor closer to or farther from the conveyance path, combined with a cover plate and cleaning member, ensures accurate image inspection and effective cleaning of the glass plate, preventing dust and paper powder adherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cleaning member rotates to clean the glass plate, then cleaning function is provided, but vibration is generated in the CIS
Solution Approach 1:
A cover plate is introduced as an intermediary component between the external environment and the CIS unit. This cover plate prevents paper powder and dust from adhering to the glass plate, eliminating the need for rotational cleaning that causes vibration. The cover plate serves as a protective barrier that maintains reading accuracy without requiring active cleaning mechanisms.
2Ease of manufacture
If the cleaning member rotates within a predetermined angle, then cleaning is performed, but only a narrow range near the center of rotation can be cleaned
Solution Approach 1:
The cover plate acts as a protective intermediary that prevents contamination across the entire glass plate surface. By preventing paper powder adhesion at the source, the full area of the glass plate remains clean without requiring extensive rotational cleaning coverage.
3Ease of manufacture
If the cleaning member engages with the glass surface, then cleaning is performed, but the cleaning effect is uneven due to varied engagement amount and linear speed
Solution Approach 1:
The cover plate serves as a protective intermediary that prevents contamination before it occurs. This eliminates the need for mechanical cleaning contact, thereby avoiding the uneven cleaning effects caused by varied engagement amounts and linear speeds during rotation.
4Measurement precision
If the reading sensor is positioned close to the conveyance path for accurate reading, then image inspection accuracy is improved, but dust and paper powder easily adhere to the glass plate
Solution Approach 1:
A cover plate is introduced as a protective intermediary that shields the glass plate and CIS unit from paper powder and dust in the conveyance path. This allows the reading sensor to remain positioned close to the conveyance path for accurate image reading while the cover plate prevents contamination by blocking harmful particles from reaching the glass plate surface.
Data Source
AI summary
An image forming system includes an image reading device which reads an image of a sheet conveyed along a conveyance path. The image reading device includes a reading sensor and a moving mechanism. The reading sensor optically reads the image. The moving mechanism moves the reading sensor to a reading position closer to the conveyance path and readable the image and a non-reading position separated from the conveyance path farther than the reading position.