Liquid Ejecting Head Vibration Absorption Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid ejecting heads face complexity in manufacturing due to multiple components and materials, which can lead to instability in liquid ejection quality due to pressure fluctuations and vibration propagation between pressure and absorbing chambers.
Innovation Solution
A liquid ejecting head design that incorporates a pressure chamber, an absorbing chamber, and an absorption member, where the pressure chamber extends in a second direction crossing the first direction, with both chambers positioned at the same location in the first direction and next to each other, and the actuator and absorption member are disposed on opposite sides, allowing efficient vibration absorption and simplifying manufacturing by using shared materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compliance substrate made of different material is used to absorb pressure fluctuation, then the stability of liquid ejection is improved, but the number of components and kinds of materials increase, complicating the manufacturing process
Solution Approach 1:
The patent merges the absorption member with existing actuator components (vibration plate or support substrate), making the absorption member include at least part of the vibration plate or support substrate. This integration reduces the number of separate components while maintaining the vibration absorption function, thereby resolving the contradiction between improving ejection stability and reducing manufacturing complexity
Solution Approach 2:
The vibration plate or support substrate is given dual functionality: it serves both as a structural component for actuation and as an absorption member for damping pressure fluctuations. This multi-functionality eliminates the need for separate absorption components, reducing material variety and simplifying the manufacturing process while maintaining reliability
2Reliability
If pressure chambers are arranged next to absorbing chambers in the same direction, then vibration absorption efficiency is improved, but the device complexity increases due to additional components
Solution Approach 1:
The patent positions pressure chambers and absorption chambers adjacent to each other in the same direction, allowing the absorption member (integrated from vibration plate or support substrate) to directly dampen pressure fluctuations from neighboring pressure chambers. This spatial arrangement improves vibration absorption efficiency without requiring additional separate components, as the absorption function is achieved through the integrated structure
Solution Approach 2:
The patent arranges pressure chambers and absorption chambers in a planar configuration where they extend in the same direction and are positioned adjacent to each other. This two-dimensional arrangement optimizes vibration absorption efficiency by placing absorption chambers in direct proximity to pressure chambers, while the absorption member's integration into existing structures prevents increases in overall device complexity
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
This design enhances the stability of liquid ejection by effectively absorbing vibrations, reducing the complexity of manufacturing, and improving the quality of ejected liquid droplets while minimizing material variety and manufacturing processes.
Implementation Method 1
an actuator including a piezoelectric element and a vibration plate that is vibrated by driving of the piezoelectric element
Implementation Method 2
the absorbing chamber absorbing the vibration of the liquid propagated from the pressure chamber
Data Source
AI summary
In this liquid ejecting head, the pressure chamber extends in a second direction crossing a first direction, the first direction being a direction from the pressure chamber to the nozzle. The pressure chamber and the absorbing chamber are disposed at a same position in the first direction and next to each other in the second direction. The actuator is disposed on an opposite side in the first direction with respect to the pressure chamber. The absorption member is disposed on the opposite side in the first direction with respect to the absorbing chamber, the absorption member including at least part of members constituting the actuator.