Handheld Printer O-Shape Design for Large-Area Printing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing handheld printers are limited in size and functionality, often requiring users to print in sections, which can lead to misalignment and high failure rates, especially when printing on surfaces larger than the printer itself, and are not easily portable due to bulky designs.
Innovation Solution
A handheld portable printer with a modular design featuring a top, front, and bottom member, a handle, and integrated components such as a projector, optical sensors, rollers, and a print head, allowing for image projection and registration, enabling printing on any surface regardless of size and providing user feedback and command inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the print head size is reduced to enable handheld portability, then the printer becomes portable and can be held in hand, but the image size that can be printed is severely limited to less than or equal to the printer itself
Solution Approach 1:
The patent transitions from a stationary printing mode to a mobile swiping mode, adding the dimension of motion. The print head moves across the print media in a sweeping motion, allowing the printable area to extend far beyond the physical dimensions of the printer itself. This dimensional change from static to dynamic operation resolves the contradiction between small size and large printable area.
Solution Approach 2:
The patent makes the printing system dynamic by allowing the print head to move relative to the print media. The system transitions from a fixed print head to a mobile print head that can be swept across the surface, enabling large-area printing with a compact device. The dynamics principle is further applied through the retractable print head mechanism that can extend and retract during operation.
2Area of moving object
If the printer is designed to print in multiple sections to cover larger areas, then the printable area increases, but alignment becomes difficult and misprinting rate increases
Solution Approach 1:
The patent incorporates optical sensors that detect the position and movement of the printer relative to the print media in real-time. This feedback is used by the control system to adjust the printing parameters and ensure accurate placement of each printed section. The feedback mechanism continuously monitors the swiping motion and compensates for deviations, maintaining high alignment precision across large print areas.
Solution Approach 2:
The patent projects the image onto the print media before actual printing begins. This preliminary action allows the user to position the projected image correctly on the target surface. The projection serves as a guide for the subsequent printing process, ensuring that multiple printed sections will align properly with the projected outline, thereby reducing misprinting and improving alignment precision.
3Volume of moving object
If the printer uses a retractable print head mechanism, then the printer can be more compact when not in use, but the device complexity increases
Solution Approach 1:
The patent divides the printer into distinct functional modules: a housing unit, a retractable print head assembly, optical sensors, a projector, and a control system. The print head is segmented from the main body and can be independently retracted. This segmentation allows the print head to be stored compactly within the housing when not in use, reducing the overall volume of the device while maintaining the functionality of each individual component.
Solution Approach 2:
The retractable print head is nested within the housing of the printer when not in use. The print head assembly can be retracted into a recess or compartment within the main body, similar to a nested doll structure. This nesting principle allows the printer to maintain a compact form factor while still incorporating the necessary printing components, reducing the external volume without sacrificing internal functionality.
4Weight of moving object
If the printer is made smaller for handheld use, then portability improves, but the structure becomes less rigid and strong
Solution Approach 1:
The patent employs composite materials in the construction of the printer housing and internal components. By combining materials with different properties (such as lightweight polymers with reinforcing fibers or rigid-plastic composites), the design achieves high strength-to-weight ratio. This allows the printer to maintain structural integrity and rigidity despite its compact, handheld size, resolving the contradiction between portability and structural strength.
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
Enables easy, accurate, and flexible printing on various surfaces without the need for special paper or registration marks, reducing misprinting and improving usability by projecting images for precise alignment and using optical sensors for movement detection.
Implementation Method 1
houses a projector to project an image on the print surface of the image to be printed
Implementation Method 2
The bottom member houses optical sensors to detect and measure movement of the handheld printer
Data Source
AI summary
A handheld portable printer includes a top member, a front member, a bottom member and a handle that are joined together to form a generally O-shaped device. The top member defines a hole through which a scroll dial protrudes and is adapted to support a retractable display on its top surface. The front member provides an area for storing consumables, a battery, and houses a projector to project an image on the print surface of the image to be printed. The bottom member houses optical sensors to detect and measure movement of the handheld printer; and a print head for outputting ink on the print surface. The handle provides additional buttons for inputting command to lock an image or begin printing, and in one embodiment housing electronics for control and projection of the image to be printed, providing user feedback, and communicating with other devices. The present invention also includes a number of novel methods including: a method for printing an image with a handheld printer, a method for projecting an image to be printed, and a method for registering a location of a printer and portions of a printed image.