Liquid Filling Port Positioning to Prevent Ink Dribble on Ejecting Head
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Solution Overview
Problem
In on-carriage type liquid ejecting apparatuses, ink filling configurations where the ink tank is installed on the carriage above the liquid ejecting head can lead to ink dribbling and adherence to the head and maintenance systems, causing printing issues and reliability reductions.
Innovation Solution
A liquid ejecting apparatus design where the liquid filling port is positioned above the liquid ejecting head but does not overlap with the nozzle forming surface, cap, or wiping member, ensuring that ink dribbling during filling does not contaminate these components, with a cap member that opens and closes the filling port and a liquid discharge port for managing ink flow within the carriage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the ink filling port is disposed above the liquid ejecting head in an on-carriage type liquid ejecting apparatus, then the ink tank can be installed on the carriage to enable continuous ink supply, but ink may dribble during filling and adhere to the liquid ejecting head and maintenance system, causing printing problems and reliability reduction
Solution Approach 1:
The patent positions the liquid filling port in a location that does not overlap with the nozzle forming surface when viewed from above (in the plan view direction). This spatial arrangement in the horizontal dimension prevents ink dribble from reaching the liquid ejecting head, while still allowing the ink tank to be mounted on the carriage for continuous supply capability.
2Ease of operation
If the ink filling port is disposed above the liquid ejecting head, then the on-carriage type configuration can be achieved, but the maintenance system components may be contaminated by dribbling ink
Solution Approach 1:
The liquid filling port is positioned at coordinates that prevent overlap with both the nozzle forming surface and the maintenance system components in the plan view. This dimensional separation ensures that even when ink dribbles during filling, it cannot reach the liquid ejecting head or maintenance system, eliminating contamination risk while preserving the on-carriage configuration.
Data Source
AI summary
A liquid ejecting apparatus includes a liquid ejecting head which ejects a liquid from a nozzle onto a medium, a liquid storage member which stores the liquid to be supplied to the liquid ejecting head, and a carriage on which the liquid ejecting head and the liquid storage member are installed and which is capable of moving on a movement path. The liquid storage member includes a liquid filling port which is disposed above the liquid ejecting head and is for filling the liquid. The liquid filling port is provided at a position which does not overlap with a nozzle forming surface in which the nozzle is formed in plan view from above.