Handy Printer Scan Roller Dynamics for Multi-Line Printing
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Solution Overview
Problem
Handy printers with a scan roller face difficulties in printing multiple lines due to the challenge of moving the printer body in the vertical direction after printing in the horizontal direction, making it hard to efficiently print characters or images across multiple lines.
Innovation Solution
A printing device equipped with a print head, sensor, and processor that detects movement and direction, allowing the print head to print in one direction, determine separation from the medium, and then print in a different direction, enabling efficient multi-line printing without manual lifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a scan roller is provided to facilitate horizontal movement, then ease of operation in horizontal direction is improved, but ability to move in vertical direction deteriorates
Solution Approach 1:
The patent applies dynamics by making the scan roller rotatable around an axis perpendicular to the paper sheet. This allows the scan roller to dynamically change its function: it can roll along the paper for horizontal scanning, or be rotated to a vertical position to facilitate vertical movement between lines, thus adapting to different operational needs without adding separate mechanisms
2Productivity
If the printer body is moved in vertical direction without lifting, then productivity is improved, but ease of operation deteriorates due to presence of scan roller
Solution Approach 1:
The scan roller is designed to be rotatable around an axis perpendicular to the paper sheet, allowing it to switch between horizontal scanning mode and vertical positioning mode. This dynamic adjustment enables the user to easily move the printer body vertically between lines by rotating the scan roller, thereby improving both productivity in multi-line printing and ease of operation
3Extent of automation
If automatic detection of movement and direction is implemented, then extent of automation is improved, but device complexity increases
Solution Approach 1:
The system uses a sensor to automatically detect the movement amount and direction of the printer body, and the control unit automatically adjusts printing parameters based on this detection. This self-service approach enables automatic multi-line printing without requiring manual intervention or complex mechanical mechanisms, achieving high automation with relatively simple device structure
Solution Approach 2:
The sensor provides feedback information about the actual movement amount and direction to the control unit, which then adjusts the printing parameters accordingly. This feedback mechanism enables automatic adaptation to user's printing needs, achieving intelligent automation while keeping the device structure relatively simple
Data Source
AI summary
A printing device includes a print head that prints an image on a print medium while moving relatively to the print medium, a sensor that detects an amount of movement and a moving direction of a body of the printing device that are relative to the print medium, and a processor, wherein the processor causes the print head to execute printing of a first image according to the amount of movement when the moving direction that is detected by the sensor is a first direction, determines whether the body is separated from the print medium based on a detection result of the sensor after printing of the first image is finished, and causes the print head to execute printing of a second image according to the amount of movement when, after separation is determined, the sensor detects movement in a second direction that is a direction different from the first direction.