Liquid Discharge Head Segmentation for Stable Nozzle-Valve Gaps
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Solution Overview
Problem
Existing liquid discharge heads experience variations in discharge speed and amount due to changes in the gap between the nozzle and the needle valve, which are caused by deformation of the housing when attached to a liquid discharge apparatus, affecting image quality and discharge performance.
Innovation Solution
The liquid discharge head is divided into multiple housings, allowing for a deformable second housing to absorb compressive forces, maintaining the gap between the nozzle and needle valve consistent, thereby reducing variations in discharge performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the housing is made as a single integrated structure, then the manufacturing process is simple, but the housing deforms under compressive forces causing variations in discharge performance
Solution Approach 1:
The housing is divided into multiple separate housings (first housing, second housing, third housing) that are connected together. This segmentation allows each housing to independently absorb deformation under compressive forces, preventing the deformation from affecting the critical gap between the nozzle and needle valve, thus maintaining discharge precision while keeping manufacturing relatively simple.
2Reliability
If the housing is made deformable to absorb compressive forces, then discharge performance varies less, but the structural complexity increases
Solution Approach 1:
The housing is divided into multiple separate housings (first housing, second housing, third housing) that are connected together. This segmentation allows each housing to independently absorb deformation under compressive forces, preventing the deformation from affecting the critical gap between the nozzle and needle valve, thus maintaining discharge precision while keeping manufacturing relatively simple.
3Stability of the object's composition
If the housing is rigid to maintain structural stability, then the overall structure is stable, but the nozzle face deforms under compression affecting discharge accuracy
Solution Approach 1:
The housing is divided into multiple separate housings (first housing, second housing, third housing) that are connected together. This segmentation allows each housing to independently absorb deformation under compressive forces, preventing the deformation from affecting the critical gap between the nozzle and needle valve, thus maintaining discharge precision while keeping manufacturing relatively simple.
Solution Approach 2:
The first housing is specifically designed to hold the nozzle plate with high positional accuracy, while the second and third housings can absorb more deformation. This local differentiation ensures that the critical nozzle positioning remains stable while other parts of the structure can flex to absorb compressive forces.
Data Source
AI summary
A liquid discharge head includes a nozzle plate, a first housing, a valve body, and a second housing. The nozzle plate has a nozzle from which a liquid is dischargeable. The first housing has a first face fixed to the nozzle plate and has a liquid chamber communicating with the nozzle to supply the liquid to the nozzle. The valve body is movable between a liquid supply position and a liquid block position in a valve moving direction. The second housing is disposed over a second face of the first housing opposite to the first face in the valve moving direction. The second housing is deformable relative to the first housing. The second housing includes a fixing portion to be secured to a support of a liquid discharge apparatus to support the liquid discharge head.