Liquid Ejecting Head Absorption Chamber Vibration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid ejecting heads have low absorption efficiency of liquid vibration due to the separation of pressure and liquid storage chambers, affecting the stability of ink ejection, and there is a need for a simple method to detect pressure near the pressure chamber.
Innovation Solution
A liquid ejecting head configuration with an absorption chamber adjacent to the pressure chamber, using a second wiring portion to detect pressure based on resistance value changes, allowing for improved vibration absorption and pressure detection without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the liquid storage chamber is provided at a position spaced apart from the pressure chamber through many members, then the structure is stable and easy to manufacture, but the absorption efficiency of liquid vibration is low
Solution Approach 1:
The patent merges the pressure chamber and liquid storage chamber into a single integrated chamber structure, eliminating the need for multiple separating members. This integration allows the liquid storage chamber to be positioned adjacent to the pressure chamber, significantly improving vibration absorption efficiency while maintaining manufacturing simplicity through the unified chamber design.
Solution Approach 2:
The patent introduces a communication flow path as an intermediary element that connects the pressure chamber and liquid storage chamber. This flow path enables efficient pressure wave transmission and vibration absorption while allowing the chambers to be positioned close together, resolving the contradiction between structural stability and absorption efficiency.
2Reliability
If the liquid storage chamber is provided at the adjacent position of the pressure chamber, then the absorption efficiency of liquid vibration is improved, but the structure becomes more complex
Solution Approach 1:
The patent merges the pressure chamber and liquid storage chamber into a single integrated chamber structure, eliminating the need for multiple separating members. This integration allows the liquid storage chamber to be positioned adjacent to the pressure chamber, significantly improving vibration absorption efficiency while maintaining manufacturing simplicity through the unified chamber design.
Solution Approach 2:
The integrated chamber structure serves multiple functions simultaneously: it acts as both the pressure chamber for ink ejection and the liquid storage chamber for vibration absorption. This multi-functionality reduces structural complexity while maintaining high absorption efficiency, as the same chamber volume fulfills both purposes.
3Measurement precision
If a separate pressure detection device is added to detect pressure near the pressure chamber, then the measurement accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent makes the liquid storage chamber serve a dual function: both vibration absorption and pressure detection. By positioning the chamber adjacent to the pressure chamber and equipping it with a pressure sensor, the system achieves accurate pressure measurement without adding separate detection devices, thereby maintaining simplicity while improving measurement precision.
Solution Approach 2:
The liquid storage chamber serves itself by providing both vibration absorption and pressure detection functions. The chamber's strategic positioning and integrated sensor allow it to contribute to both system stability and measurement accuracy, eliminating the need for additional dedicated pressure sensing components.
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
Enhances the stability and accuracy of ink ejection by effectively absorbing liquid vibrations and detecting pressure changes near the pressure chamber, improving the overall performance of the liquid ejecting head.
Implementation Method 1
a pressure acquisition portion that acquires the pressure of the absorption chamber based on a resistance value of the second wiring portion
Implementation Method 2
a head that ejects a liquid filled in a pressure chamber from a nozzle by vibrating a vibration plate constituting a wall surface of the pressure chamber with a piezoelectric element
Data Source
AI summary
A liquid ejecting head includes, a pressure chamber substrate that includes a pressure chamber in which pressure for ejecting the liquid from the nozzle is applied to the liquid, and an absorption chamber that is adjacent to the pressure chamber in a second direction and absorbs vibration of the liquid generated when the pressure is applied to the liquid in the pressure chamber, a first vibration plate that is provided corresponding to the pressure chamber and vibrates to apply the pressure to the liquid, a second vibration plate that is provided corresponding to the absorption chamber and vibrates to absorb the pressure of the liquid, a second wiring portion that is provided at a position corresponding to the absorption chamber, and a pressure acquisition portion that acquires the pressure of the absorption chamber based on a resistance value of the second wiring portion.