Duplex Scanner Skew Adjustment via Rotating Module Bracket
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Solution Overview
Problem
Conventional duplex scanning apparatuses face difficulties in adjusting the position relationship among multiple scanning modules and automatic document feeding units, leading to increased complexity and skew issues during scanning.
Innovation Solution
A duplex scanning apparatus with a scanning module adjusting unit that includes a module supporting bracket and adjusting portion, allowing for rotation and precise positioning of the second scanning module relative to the document moving direction, minimizing skew by forming a right angle with the document moving route.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a duplex scanning apparatus uses two scanning modules and one automatic document feeding unit, then both sides of a document can be scanned during once feeding, but the position adjustment becomes relatively more difficult and skew occurs more easily
Solution Approach 1:
A positioning guide structure is introduced as an intermediary component between the automatic document feeding unit and the scanning modules. This guide structure provides reference surfaces and positioning features that facilitate accurate alignment, thereby resolving the position adjustment difficulty while maintaining the productivity benefit of duplex scanning
Solution Approach 2:
The positioning system is segmented into multiple independent adjustment components: the automatic document feeding unit has its own positioning features, each scanning module has adjustable mounting positions, and the positioning guide structure provides separate reference surfaces. This segmentation allows for modular adjustment and reduces the complexity of coordinating all three components simultaneously
2Manufacturing precision
If the position of scanning modules is adjusted to prevent skew, then scanning accuracy improves, but the device complexity increases
Solution Approach 1:
The positioning guide structure is pre-configured with positioning features and reference surfaces during assembly. This preliminary positioning action establishes accurate geometric relationships between components before operation, eliminating the need for complex real-time adjustment mechanisms while maintaining high scanning accuracy
Solution Approach 2:
Complex electronic skew correction systems are replaced with simple mechanical positioning features built into the positioning guide structure. The mechanical reference surfaces and positioning elements provide inherent geometric accuracy without requiring sophisticated electronic sensors, processors, or actuators
Data Source
AI summary
A duplex scanning apparatus includes a scan case including a platen glass, a first scanning module disposed inside the scan case, a scanning module moving unit that is disposed inside the scan case perpendicular to the first scanning module and guides a movement of the first scanning module, and an automatic document feeding apparatus disposed on a top side of the scan case to cover the platen glass including a feeding frame in which a document moving route is formed, a scanning module opening formed on an upper side of the document moving route in the feeding frame, a second scanning module disposed in the scanning module opening, and a scanning module adjusting unit formed to rotate the second scanning module by a predetermined angle based on a point of the feeding frame with respect to the scanning module opening.