Liquid Discharge Head Damper Protrusion for Leak Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid discharge heads face accuracy issues due to meniscus oscillation, leading to potential leaks when the damper part communicates with the atmosphere, causing excessive displacement and pressure fluctuations during pressurization operations.
Innovation Solution
A liquid discharge head design featuring a joint member with flexible damper members and atmosphere communication chambers, along with a protrusion portion on the flow path plate to manage pressure fluctuations and prevent leaks by controlling the deformation of the damper members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damper part communicates with the ambient atmosphere to suppress meniscus oscillation, then the meniscus oscillation is suppressed, but the damper part displaces excessively and causes leaks during pressurization
Solution Approach 1:
The patent changes the pressure parameter of the atmosphere communication chamber by providing a pressure equalization hole that allows pressure equalization between the chamber and ambient atmosphere. This enables the damper part to deform appropriately during pressurization while preventing excessive displacement and leakage, thus resolving the contradiction between oscillation suppression and leakage prevention.
Solution Approach 2:
The patent introduces a pressure equalization hole as an intermediary mechanism between the atmosphere communication chamber and ambient atmosphere. This intermediary allows controlled pressure exchange, enabling the damper part to maintain proper deformation characteristics during pressurization operations while preventing harmful leakage effects.
2Reliability
If the damper part is made flexible to suppress pressure fluctuations, then pressure fluctuations are suppressed, but the damper part deforms excessively when pressurized
Solution Approach 1:
The patent utilizes pressure equalization through the pressure equalization hole to control the pressure parameter within the atmosphere communication chamber. This enables the flexible damper part to deform in a controlled manner during pressurization while maintaining stability, thus resolving the contradiction between pressure fluctuation suppression and deformation stability.
3Adaptability or versatility
If the damper part is allowed to deform freely to absorb pressure changes, then pressure changes are absorbed, but air or liquid leaks from the connecting portion
Solution Approach 1:
The patent controls the pressure parameter of the atmosphere communication chamber through the pressure equalization hole, enabling the damper part to deform freely to absorb pressure changes while maintaining proper pressure balance that prevents leakage from connecting portions.
Solution Approach 2:
The pressure equalization hole acts as an intermediary that mediates between the damper part deformation and the connecting portion sealability, allowing pressure changes to be absorbed while maintaining proper pressure balance to prevent leakage.
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 suppresses pressure fluctuations and prevents leaks by allowing increased deformation of the damper members while maintaining atmospheric pressure, ensuring consistent liquid discharge accuracy and reducing the risk of air or liquid leakage during pressurization.
Implementation Method 1
a flexible damper part is provided in a portion of a liquid chamber to suppress meniscus vibration in a discharge port
Implementation Method 2
the area of the damper part on the side opposite to the liquid chamber communicates with an atmosphere to improve an effect of suppressing the meniscus oscillation
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A liquid supply member includes a first member (10), a second member (3), and a damper member (19) disposed between the first member (10) and the second member (3), wherein the first member (10) is a member configured to form a liquid chamber (13), wherein the damper member (19) is a flexible member configured to form the liquid chamber (13) together with the first member (10), wherein the second member (3) is a member configured to form an atmosphere communication chamber communicating with an ambient atmosphere at a position between the damper member and the second member and opposing the liquid chamber with the damper member in between, and wherein a protrusion portion (35) is formed on a surface of the second member facing the atmosphere communication chamber at a position corresponding to a central part of the damper member, the protrusion portion protruding toward the damper member beyond a connection surface between the damper member and the second member.