Liquid Discharge Head Truss Beam Rigidity
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Solution Overview
Problem
Existing liquid discharge heads face challenges in maintaining stable discharge characteristics due to vibrations caused by deformation of the common channel member, leading to variations in discharge performance depending on nozzle positions.
Innovation Solution
The implementation of a truss-shaped beam arrangement connecting side walls of the common supply and collection channels enhances rigidity, reducing vibration transmission to the nozzle plate and stabilizing discharge characteristics by concentrating stress on central portions of the side walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the common supply channel is made shorter in the short-side direction, then the discharge characteristics become more stable, but the structural rigidity decreases leading to increased vibrations
Solution Approach 1:
The common supply channel is divided into multiple segments along its longitudinal direction, with each segment having a constant width. This segmentation allows the channel to maintain structural integrity while accommodating the shorter overall length requirement, thus preserving rigidity despite the reduced dimension.
Solution Approach 2:
The width of the common supply channel varies along its longitudinal direction, with different segments having different constant widths. This local quality variation optimizes the structural rigidity distribution, ensuring that critical sections maintain sufficient stiffness to prevent vibrations while allowing the overall channel length to be reduced for stable discharge characteristics.
2Productivity
If the common supply channel length is reduced, then the liquid flow path is shortened improving efficiency, but the structural stability decreases causing vibration-induced discharge variations
Solution Approach 1:
The common supply channel is segmented into multiple sections along its length, each with optimized constant width dimensions. This segmentation enables the channel to achieve the required short length for improved liquid flow efficiency while maintaining structural stability through the distributed rigidity provided by the segmented structure.
Solution Approach 2:
The width parameter of the common supply channel is changed along its longitudinal direction, with each segment having a different constant width. This parameter variation allows the channel to be shorter overall (improving liquid flow efficiency) while specific wider segments provide the structural stability needed to prevent vibrations and maintain consistent discharge characteristics.
Data Source
AI summary
A liquid discharge head includes multiple nozzles, multiple pressure chambers, a common supply channel, and multiple beams. The multiple nozzles discharge liquid. The multiple pressure chambers communicate with the multiple respective nozzles. The common supply channel communicates with the multiple pressure chambers. The common supply channel is shorter in a short-side direction than in a longitudinal direction perpendicular to the short-side direction. The multiple beams are arranged in a truss shape to connect side walls on lateral sides of the common supply channel in the short-side direction of the common supply channel.