Dual-Use Document Feeder with Self-Actuated Guide Path Switching
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Solution Overview
Problem
Conventional dual-use automatic document feeders have a complicated structure and high manufacturing cost due to the use of multiple transmission gears and torque limiters for guiding documents.
Innovation Solution
A dual-use automatic document feeder design featuring a tilted feeding path, horizontal feeding path, U-turn path, upper and lower scanning units, and a movable document guider with a pivot end, guiding arm, and actuating end, where the upper scanning unit lifts to drive the movable guider, simplifying the structure and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmission gears and torque limiters are used to drive the movable document guider, then the document guidance function is achieved, but the structure becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent removes the complex transmission gears and torque limiters from the system. Instead of using a motor-driven mechanism with multiple components, the invention extracts only the essential document guidance function and implements it through a simple movable guider that relies on document weight and friction, eliminating unnecessary mechanical complexity while maintaining the core functionality.
2Reliability
If multiple transmission gears and torque limiters are used to drive the movable document guider, then the document guidance function is achieved, but the manufacturing cost increases
Solution Approach 1:
The patent replaces expensive, complex mechanical components (gears, torque limiters, motors) with simple, inexpensive materials such as friction strips and lightweight guiders. The friction strip, made from simple adhesive tape or similar material, provides the necessary control function at minimal cost, making the device much more economical to manufacture while maintaining reliability.
3Manufacturing precision
If the movable document guider is driven by motor and torque limiter, then the document can be guided accurately, but the device complexity increases
Solution Approach 1:
The movable document guider is designed to be self-regulating through the friction strip mechanism. As the guider moves, the friction strip automatically adjusts to the document's weight and thickness, providing precise guidance without requiring external motor control. The system uses the document's own properties (weight, friction coefficient) to control the guider's movement, eliminating the need for complex driving mechanisms.
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 simplified structure achieves efficient document guidance with reduced manufacturing costs by using the upper scanning unit to lift and deflect the movable guider, ensuring smooth feeding and scanning of documents of varying thicknesses.
Implementation Method 1
When the document passes through a bottom of the upper scanning unit, the upper scanning unit is pushed by the document to make the upper scanning unit be lifted upward by the document, when the upper scanning unit is lifted, the upper scanning unit pushes the actuating end to make the blocking end depart from a junction between the front opening and the rear opening of the horizontal feeding path
Implementation Method 2
the movable document guider 80′ falls naturally by a gravity when the conventional dual-use automatic document feeder 100′ feeds the documents in a forward direction
Data Source
AI summary
A dual-use automatic document feeder includes a tilted feeding path, a horizontal feeding path, a U-turn feeding path, an upper scanning unit and a movable document guider. The horizontal feeding path includes a front opening and a rear opening. The U-turn feeding path is connected between the tilted feeding path and the horizontal feeding path. The upper scanning unit is positioned between the front opening and the rear opening. The movable document guider is positioned at a junction between the U-turn feeding path and the horizontal feeding path. The movable document guider has a pivot end pivotally connected to the U-turn feeding path, a guiding arm slantwise extended downward and rearward from the pivot end to the horizontal feeding path, a blocking end positioned at a terminal end of the guiding arm, and an actuating end positioned at a terminal end of the blocking end.