Liquid Container Fitting Asymmetry for Ink Refill and Cleaning
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Solution Overview
Problem
Existing liquid discharge apparatuses, such as printers, face challenges in preventing color mixture during ink refilling and in efficiently supplying cleaning liquids to multiple liquid containers, as the fitting parts of refill bottles and liquid containers are not designed to prevent cross-color contamination and do not facilitate easy cleaning liquid distribution.
Innovation Solution
The apparatus includes multiple liquid containers with unique first fitting parts for refill bottles of different colors and a third fitting part for a cleaning bottle, allowing only matching refill bottles to connect and enabling the cleaning bottle to supply a common cleaning liquid to all containers, thus preventing color mixture and simplifying the cleaning liquid supply operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If refill bottles and liquid containers use simple fitting parts, then the device structure is simple, but color mixture cannot be prevented during refilling
Solution Approach 1:
The patent applies asymmetry by designing fitting parts with color-specific asymmetric shapes. Each fitting part has a unique geometric configuration that only matches its corresponding color, preventing mismatched refilling. For example, cyan fitting parts have a specific asymmetric shape that only fits cyan liquid containers, while magenta fitting parts have a different asymmetric shape that only fits magenta liquid containers.
Solution Approach 2:
The patent applies local quality by giving each fitting part color-specific local characteristics. The fitting parts have different local geometric features (such as different numbers, positions, or shapes of protrusions and recesses) corresponding to different colors, enabling color identification and prevention of color mixture at the local level of the fitting interface.
2Productivity
If separate fitting parts are used for each liquid container, then color mixture is prevented, but cleaning liquid supply becomes inefficient
Solution Approach 1:
The patent applies universality by designing the cleaning bottle fitting part with a universal structure that can supply cleaning liquid to all liquid containers regardless of color. The cleaning bottle fitting part has a standardized interface that is compatible with all liquid container types, enabling one cleaning bottle to serve multiple functions across different color stations.
Solution Approach 2:
The patent applies segmentation by separating the fitting part functions into two distinct systems: color-specific fitting parts for ink refilling (with unique shapes for each color) and a universal fitting part for cleaning liquid supply (with a standardized shape). This segmentation allows each system to optimize for its specific purpose without interference.
3Reliability
If fitting parts are designed for precise color matching, then color mixture is prevented, but ease of operation decreases
Solution Approach 1:
The patent applies color changes by incorporating color-coded visual indicators on the fitting parts. Each fitting part has distinct color markings (such as colored rings, labels, or the fitting part material itself being colored) that match the corresponding liquid color, providing immediate visual feedback to the operator to ensure correct matching without requiring complex mechanical alignment.
Solution Approach 2:
The patent applies asymmetry with simplified asymmetric features that are easy to recognize and align. The asymmetric shapes include prominent visual characteristics (such as different numbers of tabs, distinct geometric patterns, or easily distinguishable profiles) that allow operators to quickly identify the correct fit without requiring precise alignment procedures.
Data Source
AI summary
A liquid discharge apparatus includes multiple heads configured to respectively discharge different types of liquids, and multiple liquid containers configured to respectively contain the different types of liquids to be respectively supplied to the multiple heads. Each of the multiple liquid containers includes a first fitting part fittable to each of: a second fitting part of corresponding one of multiple refill bottles respectively containing the different types of liquids to be respectively supplied to the multiple liquid containers; and a third fitting part of a cleaning bottle containing a cleaning liquid to be commonly supplied to each of the multiple liquid containers.