Liquid Discharge Head Deformable Damper Pressure Wave Absorption
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Solution Overview
Problem
Pressure waves from liquid discharge in liquid discharge heads can cause interference, discharge failures, and leakage due to mutual interference in the common liquid chamber, which existing technologies have not adequately addressed.
Innovation Solution
A liquid discharge head design featuring a deformable damper integrated into the common liquid chamber wall and damper chambers positioned along the nozzle array direction, with the damper chambers extending further than individual liquid chambers at each end, to absorb pressure variations and reduce rigidity variances, thereby stabilizing liquid discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a deformable damper is disposed at a portion of a wall face of the common liquid chamber, then pressure waves are absorbed and discharge stability is improved, but the structural complexity increases
Solution Approach 1:
The damper chamber is merged with the common liquid chamber structure, where the damper chamber forms part of the common liquid chamber's wall configuration. This integration allows the damper to absorb pressure waves while maintaining a unified structural design, reducing overall complexity compared to adding a separate damper system.
Solution Approach 2:
The common liquid chamber serves multiple functions: it supplies liquid to individual liquid chambers and simultaneously acts as a damper chamber to absorb pressure waves. The wall face of the common liquid chamber that forms the damper chamber configuration enables this multi-functionality, eliminating the need for a separate dedicated damper structure.
2Reliability
If damper chambers are disposed at a side opposite the common liquid chamber, then pressure wave absorption is enhanced, but the device occupies more space
Solution Approach 1:
The damper chamber is nested within the common liquid chamber structure. The damper chamber is formed as a recess or cavity in the wall face of the common liquid chamber, allowing the damper functionality to be contained within the existing volume of the common liquid chamber rather than requiring additional external space.
Solution Approach 2:
Instead of extending the damper chamber in the direction perpendicular to the nozzle array (which would increase device volume), the damper chamber is configured to extend in the nozzle array direction. This dimensional reorientation allows effective pressure wave absorption while maintaining a compact overall device footprint.
3Reliability
If damper chambers extend to outer areas in the nozzle array direction, then rigidity variance is reduced and discharge consistency is improved, but manufacturing complexity increases
Solution Approach 1:
The damper chamber extends to outer areas in the nozzle array direction specifically at positions where rigidity variance is most problematic. This localized extension provides targeted structural reinforcement and pressure wave absorption where needed, rather than uniformly increasing complexity throughout the entire structure.
Solution Approach 2:
The damper chamber configuration is asymmetric relative to the common liquid chamber, extending further in the nozzle array direction at specific locations. This asymmetric design optimizes pressure wave absorption and rigidity distribution to improve discharge consistency from nozzles at different positions, addressing the non-uniform nature of the pressure wave problem.
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
This configuration ensures consistent discharge speed across all nozzles by absorbing pressure waves, reducing variances in rigidity and preventing discharge failures, thus enhancing the reliability and quality of liquid discharge.
Implementation Method 1
The deformable damper constitutes part of a wall face of the common liquid chamber... to absorb pressure variations and reduce rigidity variances
Implementation Method 2
The deformable damper constitutes part of a wall face of the common liquid chamber... to absorb pressure variations
Data Source
AI summary
A liquid discharge head includes a plurality of nozzles, a plurality of individual liquid chambers, a common liquid chamber, a deformable damper, and a damper chamber. The plurality of nozzles is arrayed in a nozzle array direction, to discharge liquid. The plurality of individual liquid chambers is communicated with the plurality of nozzles. The common liquid chamber supplies liquid to the plurality of individual liquid chambers. The deformable damper constitutes part of a wall face of the common liquid chamber. The damper chamber is disposed along the nozzle array direction with the damper interposed between the damper chamber and the common liquid chamber. The damper chamber extends to an outer area in the nozzle array direction than an individual liquid chamber of the plurality of individual liquid chambers at each end in the nozzle array direction.