Liquid Ejecting Apparatus Base Member Positional Accuracy
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Solution Overview
Problem
In ink jet printers, the accumulation of attachment errors between components in the medium transport path leads to difficulties in achieving precise positional accuracy of the medium.
Innovation Solution
Attaching the unwinding and winding units to a common base member, with a transporting unit positioned between them, and incorporating an ejecting unit for weight balance and angle adjustment, along with a medium supporting portion and tension adjusting unit, to improve positional accuracy and balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the sending device and the winding device are attached to a main body frame via different components, then the device structure is more flexible and easier to assemble, but the attachment error of each component is accumulated, making it difficult to improve the positional accuracy of the medium in the transport path
Solution Approach 1:
The patent merges the sending device and winding device onto a single base member, eliminating intermediate mounting components. This direct attachment approach prevents cumulative positioning errors that would occur with multiple separate mounting components, thereby improving the positional accuracy of the medium in the transport path while reducing the overall number of components.
2Ease of manufacture
If multiple components are used between the sending and winding devices, then the device can be assembled more easily with modular components, but the attachment error accumulates and reduces positional accuracy
Solution Approach 1:
By integrating both the sending device and winding device directly onto the base member, the patent reduces the number of assembly interfaces and mounting components. This simplification maintains ease of manufacture through straightforward direct attachment while eliminating the cumulative positioning errors that would arise from multiple intermediate mounting components.
3Stability of the object's composition
If the ejecting unit is positioned between the unwinding unit and the winding unit, then the weight balance between the unwinding unit and winding unit can be optimized, but the space for medium transport is reduced
Solution Approach 1:
The ejecting unit is positioned in the width direction (transverse to the medium transport direction) between the unwinding and winding units. This spatial arrangement in a different dimension allows the ejecting unit to contribute to weight balance without obstructing the medium transport path, effectively resolving the conflict between weight optimization and transport space requirements.
Data Source
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AI summary
There is provided a liquid ejecting apparatus including: an unwinding unit that holds a roll-shaped medium and unwinds the held medium; an ejecting unit that ejects liquid onto the medium unwound from the unwinding unit; a winding unit that winds the medium onto which the liquid is ejected; and a base member to which the unwinding unit and the winding unit are attached.