Liquid Cartridge Projection Member for Atmosphere Path Protection
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Solution Overview
Problem
Existing liquid cartridges can become hermetically sealed due to free liquid blocking the atmosphere communication path, leading to unstable liquid supply and deteriorated recording quality.
Innovation Solution
A liquid cartridge design featuring a projection member connected to the liquid holding member, which surrounds the atmosphere communication path opening and prevents free liquid intrusion by capturing and absorbing it, ensuring stable liquid supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If free liquid is generated in the liquid holding member, then liquid supply becomes unstable and recording quality deteriorates, but adding a projection member to prevent blockage increases device complexity
Solution Approach 1:
The liquid holding member is segmented into multiple porous bodies arranged in parallel, each capable of independently holding liquid. This segmentation prevents free liquid from forming continuous paths that could block the atmosphere communication path, while maintaining simple overall structure.
Solution Approach 2:
The projection member acts as an intermediary barrier between the liquid holding member and the atmosphere communication path opening. It intercepts free liquid before it can intrude into the communication path, preventing blockage without requiring complex sealing mechanisms.
2Quantity of substance
If the liquid holding member is made of porous body to generate negative pressure, then liquid can be held effectively, but free liquid may intrude into the atmosphere communication path and cause blockage
Solution Approach 1:
Different regions of the liquid holding member have different properties: the porous bodies provide liquid holding capacity while the projection member provides a non-porous barrier function. This local differentiation allows the system to simultaneously achieve effective liquid retention and prevention of communication path blockage.
Solution Approach 2:
The projection member converts the harmful effect of free liquid (potential blockage) into a beneficial outcome by using the free liquid's own movement to push it against the projection member, where it is captured and redirected away from the atmosphere communication path opening.
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
Prevents blockage of the atmosphere communication path, maintaining stable liquid supply and improving yield rates, thereby enhancing recording quality and reducing manufacturing costs.
Implementation Method 1
the projection member... prevents free liquid intrusion by capturing and absorbing it
Implementation Method 2
a liquid holding member that is made of a porous body as a negative pressure generation unit
Data Source
AI summary
A liquid cartridge includes a liquid container configured to store a liquid, a lid part configured to cover the liquid container, a liquid holding member stored in the liquid container and configured to hold the liquid, and a projection member connected to the liquid holding member, wherein the liquid holding member has a first surface facing the lid part, wherein the lid part includes an atmosphere communication path that communicates inside and outside of the liquid container, wherein the atmosphere communication path includes an opening that is open to the inside of the liquid container, and wherein the projection member projects from the first surface toward the lid part, and surrounds at least a portion of the opening as viewed from a vertical direction orthogonal to the first surface in which the lid part covers the liquid container.