Liquid Ejection Head with Lever-Actuated Dual-Channel Connection
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Solution Overview
Problem
Bubbles entering liquid ejection heads during tank replacement or maintenance can lead to insufficient ejection pressure and liquid leakage, affecting the stability and performance of liquid ejection apparatuses.
Innovation Solution
A liquid ejection head design with a head-side connecting member featuring two connecting portions at the same height, allowing simultaneous connection of a supply tube and a deaeration tube through a lever mechanism, simplifying the mounting and maintenance process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate connecting portions for liquid channel and deaeration channel are provided, then bubble discharge function is improved, but mounting time and operational complexity increase
Solution Approach 1:
The patent combines the liquid channel connecting portion and deaeration channel connecting portion into a single integrated head-side connecting member. This merging allows both channels to be connected simultaneously through one mounting operation, eliminating the need for separate connection steps while maintaining the bubble discharge function.
Solution Approach 2:
The head-side connecting member is designed with multi-functionality, serving both as a liquid supply connection and a deaeration connection point. This universal connecting structure enables a single component to fulfill multiple functions, reducing the number of separate parts and connection operations required.
2Reliability
If multiple separate connecting portions are provided, then bubble discharge function is improved, but operational complexity increases
Solution Approach 1:
The patent merges multiple separate connecting portions into a single integrated head-side connecting member with multiple connection interfaces. This consolidation simplifies the overall connection structure by reducing the number of discrete components while preserving all necessary connection functions for both liquid and deaeration channels.
3Reliability
If separate connecting portions are used, then bubble discharge capability is maintained, but ease of operation deteriorates
Solution Approach 1:
The patent combines separate connecting portions into a single head-side connecting member that interfaces with both liquid and deaeration channels. This merging enables operators to complete both connections in one simple operation, significantly improving ease of mounting and replacement while maintaining full bubble discharge capability.
Solution Approach 2:
The head-side connecting member is pre-configured with both liquid channel and deaeration channel connection interfaces in a fixed spatial relationship. This preliminary arrangement of connection points allows for simplified, intuitive mounting operations without requiring complex alignment procedures during installation.
Data Source
AI summary
Provided is a liquid ejection head including: an ejection port for ejecting a liquid; a housing part having a liquid channel and a deaeration channel; and a head-side connecting member having a first head-side connecting portion linked to the liquid channel and a second head-side connecting portion linked to the deaeration channel. The first head-side connecting portion is connected to a first main body-side connecting portion of a main body-side connecting member linked to a supply tube. The second head-side connecting portion is connected to a second main body-side connecting portion of the main body-side connecting member linked to a deaeration tube. The first head-side connecting portion and the first main body-side connecting portion get connected to each other and the second head-side connecting portion and the second main body-side connecting portion get connected to each other by operating a lever.