Adjustable Pick Roller Mechanism for Thick Document Feeding
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Solution Overview
Problem
Conventional image forming apparatuses, such as mini portable scanners, are unable to process thick documents like ID cards due to a fixed document channel height, which prevents the proper feeding and discharging of such documents.
Innovation Solution
A thick document conveying device with an adjustable paper pickup mechanism, featuring a pick roller base, axle, switching assembly, universal couplings, driving mechanisms, and a gear system, allowing the pick roller to move vertically to accommodate both thin and thick documents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the document channel height is fixed for thin documents, then thin documents can be continuously fed, but thick documents cannot be fed or discharged
Solution Approach 1:
The pick roller base is designed to be movable vertically instead of fixed, allowing the pick roller height to be dynamically adjusted between a first position (for thin documents) and a second position (for thick documents). This dynamic adjustment resolves the contradiction by enabling both continuous feeding of thin documents and accommodation of thick documents through position changes.
Solution Approach 2:
The invention changes the height parameter of the pick roller by moving it between two distinct positions. This parameter change allows the system to adapt to different document thicknesses, resolving the contradiction between optimized performance for thin documents and adaptability to thick documents.
2Ease of manufacture
If the pick roller height is fixed, then the structure is simple, but it cannot accommodate both thin and thick documents
Solution Approach 1:
The pick roller base is designed with movable capability through a switching assembly that can shift between two positions. This dynamic structure maintains relative simplicity while enabling adaptability to different document types, resolving the contradiction between structural simplicity and functional versatility.
Solution Approach 2:
The picking mechanism is segmented into movable components (pick roller base, switching assembly, driving mechanisms) that can independently adjust position. This segmentation allows the system to maintain overall structural simplicity while achieving the complexity needed for dual-position operation and document type adaptability.
3Adaptability or versatility
If a movable pick roller base is added to adjust height, then both thin and thick documents can be processed, but the device complexity increases
Solution Approach 1:
The complex adjustment function is segmented into modular components: pick roller base, switching assembly, first driving mechanism, and second driving mechanism. Each component has a specific function, and they work together through universal couplings that allow independent movement and adjustment, managing complexity through functional segmentation.
Solution Approach 2:
Universal couplings are introduced as intermediary elements between the driving mechanisms and the pick roller base. These couplings facilitate the transmission of motion while allowing for positional adjustments and accommodating the complex movements required for dual-position operation, managing complexity through the use of standardized intermediary components.
Data Source
AI summary
A thick document conveying device includes a paper pickup mechanism. The paper pickup mechanism has a pick roller base, a pick roller axle, a pick roller, a switching assembly, a first universal coupling, a driving mechanism, a second universal coupling, a bearing and a gear. The pick roller axle and the pick roller are located in the pick roller base. The switching assembly is located under the pick roller base. The first universal coupling is connected to the pick roller axle. The driving mechanism is sleeved on the first universal coupling. The second universal coupling is connected to the driving mechanism. The bearing is connected to the driving mechanism. The gear is connected to the bearing. As described above, both a thick document and a thin document can be adapted.