Liquid Discharge Head Vibration Damping and Resonance Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid discharge heads face challenges in maintaining consistent discharge speed due to resonance between the liquid chamber substrate and pressure fluctuations in the common and circulation common liquid chambers, leading to variations in print quality.
Innovation Solution
The liquid discharge head incorporates a vibration damper and reinforcement bridges to prevent elastic deformation of the liquid chamber walls, thereby reducing resonance and pressure fluctuations, and ensuring consistent discharge speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the common liquid chamber and circulation common liquid chamber are arranged side by side to improve liquid circulation, then liquid supply efficiency is improved, but resonance between the liquid chamber substrate and pressure fluctuations occurs, causing discharge speed variations
Solution Approach 1:
A partition wall is introduced as an intermediary structure between the common liquid chamber and circulation common liquid chamber. This partition wall includes a communication hole that allows controlled liquid communication while preventing direct pressure transmission. The partition wall acts as a mediator that maintains liquid supply efficiency while isolating the pressure fluctuations that cause resonance and discharge speed variations.
Solution Approach 2:
The common liquid chamber is divided into multiple individual liquid chambers, each communicating with the circulation common liquid chamber through separate communication holes in the partition wall. This segmentation isolates pressure fluctuations within each chamber, preventing resonance while maintaining overall liquid supply efficiency. Each segmented chamber can be independently controlled, improving discharge consistency.
2Quantity of substance
If the common liquid chamber is made wider to increase liquid storage capacity, then liquid supply capacity is improved, but the liquid chamber substrate becomes more prone to elastic deformation, increasing resonance
Solution Approach 1:
The partition wall is strategically positioned within the wider common liquid chamber to provide localized structural support. This creates regions of different stiffness within the chamber, with the partition wall area providing enhanced stability against elastic deformation while other areas maintain liquid storage capacity. The local reinforcement prevents resonance without reducing overall storage volume.
Solution Approach 2:
The liquid chamber structure combines the partition wall (providing structural rigidity) with the liquid-filled chambers (providing storage capacity). This composite structure allows the system to simultaneously achieve high liquid storage capacity and resistance to elastic deformation, as the partition wall and liquid chambers work together to prevent resonance while maintaining volume.
3Reliability
If reinforcement bridges are added to prevent elastic deformation of liquid chamber walls, then resonance is reduced, but device complexity increases
Solution Approach 1:
The partition wall serves multiple functions simultaneously: it divides the common liquid chamber into individual chambers, provides structural reinforcement to prevent elastic deformation, controls liquid communication through the communication hole, and isolates pressure fluctuations. This multi-functionality reduces the need for separate reinforcement bridges, thereby reducing device complexity while maintaining discharge speed consistency.
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
The solution effectively reduces variations in discharge speed and improves print quality by damping pressure fluctuations and preventing resonance between the liquid chamber substrate and the common and circulation common liquid chambers.
Implementation Method 1
The common liquid chamber includes a vibration damper that damps vibration of the liquid in the common liquid chamber
Data Source
AI summary
A liquid discharge head includes a nozzle plate, multiple individual liquid chambers, a circulation common liquid chamber, a common liquid chamber, a vibration damper, a circulation bridge, and a common bridge. The nozzle plate has multiple nozzles from which a liquid is dischargeable in a liquid discharge direction. The multiple nozzles are arrayed in a nozzle array direction orthogonal to the liquid discharge direction. The vibration damper damps vibration of the liquid in the common liquid chamber. The circulation bridge is bridging the circulation common liquid chamber in an orthogonal direction orthogonal to the nozzle array direction and the liquid discharge direction. The common bridge is bridging the common liquid chamber in the orthogonal direction. The common bridge is disposed at the same position as the circulation bridge in the liquid discharge direction.