Liquid Discharge Head Valve Structure for Stable Ink Sealing
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Solution Overview
Problem
The adhesion of the elastic member to the openably closing valve in liquid discharge heads is insufficient, leading to gaps and variations in liquid discharge, which affects the consistency of the discharge amount.
Innovation Solution
A liquid discharge head design with a core end featuring a concave recessed opposite to the discharge port and an elastic member covering the concave and outer side face, enhancing adhesion through integral molding and specific material selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elastic member is pressed against the discharge port many times through repeated valve movement, then the sealing function is maintained, but the elastic member peels off from the openably closing valve and gaps are created
Solution Approach 1:
The elastic member is nested within a concave structure formed in the openably closing valve. This nesting arrangement provides mechanical retention that prevents peeling during repeated pressing operations, while maintaining the sealing function through the elastic member's contact with the discharge port.
Solution Approach 2:
The concave structure extends in a direction opposite to the discharge port, creating a dimensional feature that provides retention in a different orientation. This dimensional approach to retention complements the radial pressing action, preventing peeling without compromising sealing effectiveness.
2Stability of the object's composition
If gaps are created between the elastic member and openably closing valve, then adhesion deterioration occurs, but the discharge port sealing is compromised
Solution Approach 1:
The concave structure provides a precise geometric fit for the elastic member, ensuring consistent positioning and eliminating gaps. The nesting arrangement maintains stable adhesion while guaranteeing uniform gap dimensions (or eliminating gaps entirely) for reliable sealing.
3Stability of the object's composition
If the elastic member peels off from the openably closing valve, then adhesion deteriorates, but the liquid discharge amount becomes variable
Solution Approach 1:
The concave structure provides mechanical retention that prevents elastic member peeling during repeated valve operations. This stable adhesion ensures consistent valve sealing, which directly maintains constant liquid discharge amounts and improves productivity.
Solution Approach 2:
The elastic member is designed as a replaceable component with a concave retention structure. When wear or peeling occurs, the elastic member can be easily replaced without affecting the overall valve assembly, maintaining consistent discharge performance.
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
Improves the adhesion of the elastic member to the core end, reducing variations in lift amount and discharge volume, ensuring stable ink discharge over time.
Implementation Method 1
an elastic member covering the concave and an outer side face of the core end continuously
Data Source
AI summary
A liquid discharge head includes: a discharge port, from which a liquid is to be discharged; and an openably closing valve configured to move in a moving direction toward the discharge port to openably close the discharge port, the openably closing valve including a core, wherein the core has a core end at one end of the core opposing the discharge port, the core end has: a concave in the core end, the concave recessed in a direction opposite to the discharge port; and an elastic member covering the concave and an outer side face of the core end continuously.