Printing Device Non-Electrifying Time Control
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Solution Overview
Problem
Existing printing devices fail to secure a non-electrifying time equal to or longer than a predetermined time, leading to deterioration of the printing unit, as the ratio-based approach in prior art may not ensure sufficient non-electrifying time, resulting in potential malfunction.
Innovation Solution
A printing device with a control unit that calculates and adjusts the electrifying and non-electrifying times based on detection signals from a rotary encoder, ensuring the non-electrifying time is extended to meet or exceed a predetermined threshold to prevent unit deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the non-electrifying time is extended to prevent printing unit deterioration, then the reliability is improved, but the productivity deteriorates due to longer cycle time
Solution Approach 1:
The patent implements dynamic adjustment of the non-electrifying time period based on detected shaft rotation. The control unit calculates the actual non-electrifying time using detection signals from the rotary encoder and extends this period when necessary to ensure it meets the predetermined threshold, thereby dynamically optimizing between reliability and productivity
Solution Approach 2:
The patent changes the time parameter of the non-electrifying period from a fixed ratio-based value to a dynamically adjusted value that ensures it is equal to or longer than a predetermined time. This parameter change is achieved by calculating the actual non-electrifying time based on shaft rotation detection and extending it when the calculated time is insufficient
2Device complexity
If the ratio-based electrifying and non-electrifying times are used, then the device complexity is reduced, but the reliability deteriorates as the non-electrifying time may be insufficient
Solution Approach 1:
The patent introduces feedback control by using a detection unit (rotary encoder) to detect shaft rotation and providing this information to the control unit. The control unit calculates the actual non-electrifying time based on this feedback and adjusts the timing accordingly, ensuring the non-electrifying time meets the predetermined threshold while maintaining relatively simple device architecture
Solution Approach 2:
The patent replaces the mechanical ratio-based timing mechanism with an electronic control system that calculates timing based on detected shaft rotation. This substitution allows for more precise and flexible timing control without significantly increasing mechanical complexity
Data Source
AI summary
A printing device includes: a printing unit printing on a recording paper; a feeder unit having a roller that rotates about a shaft and feeds the recording paper and a motor that rotates the shaft; a detection unit detecting the rotation of the shaft; and a control unit controlling the printing unit. The control unit calculates an electrifying time during which the printing unit is electrified and a non-electrifying time during which the printing unit is not electrified following the electrifying time, based on a detection signal from the detection unit. When the calculated non-electrifying time is less than a predetermined time, the control unit corrects the non-electrifying time in such a way that the non-electrifying time becomes equal to or longer than the predetermined time, and causes the printing unit to print.