Ejection Roller Module Dynamics for Paper Transfer Reliability
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Solution Overview
Problem
Conventional printing devices face paper transfer failure issues due to insufficient clamping force, requiring a strong power element to maintain the rollers in a closed position for stapling, which is inefficient and prone to failure.
Innovation Solution
A printing device with an ejection control module that allows the ejection roller module to switch between a released and ejection state, adjusting the positions of the rollers to clamp or release paper sheets, eliminating the need for high-force power elements by using a simple mechanical structure with gears and power elements to control the roller movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a strong power element is used to maintain the rollers in a closed position for stapling, then the clamping force is sufficient to prevent paper transfer failure, but the device complexity and energy consumption increase
Solution Approach 1:
The roller assembly is designed to dynamically switch between open and closed positions based on operational requirements. The rollers can be moved to a closed position during stapling to provide sufficient clamping force, and then returned to an open position for paper transfer, eliminating the need for continuously high-force power elements
Solution Approach 2:
The roller assembly operates periodically, being closed only during the brief stapling operation and open during the rest of the paper transfer process. This periodic action allows the use of a weaker power element that only needs to generate force during the short stapling interval, rather than continuously
2Reliability
If a strong power element is used to maintain the rollers in a closed position, then the clamping force is sufficient, but the energy consumption increases
Solution Approach 1:
The power element operates periodically only during the stapling operation when clamping force is needed, rather than continuously. The rollers are closed briefly during stapling and then opened for paper transfer, significantly reducing the total energy consumption of the power element
Solution Approach 2:
The system dynamically adjusts the roller position based on operational phase, using the power element only when needed for stapling. This dynamic operation allows the use of a lower-power element that consumes less energy overall while still providing sufficient clamping force during the critical stapling moment
Data Source
AI summary
A printing device includes a sheet placement plate, an ejection roller module and an ejection control module. The ejection roller module is located near the sheet placement plate to eject at least one paper sheet. The ejection control module is connected with the ejection roller module. The ejection roller module is selectively in a released state or an ejection state under control of the ejection control module. When the ejection roller module is in the released state, the at least one paper sheet is transferred to the sheet placement plate through the ejection roller module. The ejection roller module is in the ejection state, the at least one paper sheet is outputted by the ejection roller module.