液体喷头、液体喷射单元以及液体喷射装置
By designing the inherent vibration period of the meniscus liquid surface in the liquid nozzle to be inconsistent with the resonance period of the common liquid chamber, the problem of uneven droplet ejection speed under the limitation of actuator drive frequency is solved, and high-quality droplet ejection and printing effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- RICOH CO LTD
- Filing Date
- 2023-09-26
- Publication Date
- 2026-07-17
AI Technical Summary
Existing liquid nozzles, when the actuator drive frequency is limited, cause a decrease in image quality due to the difference in droplet ejection velocity between nozzles. In particular, when the natural vibration period of the meniscus is close to the resonance period of the common liquid chamber, the uneven ejection velocity causes uneven droplet position and area.
By designing the nozzle and common liquid chamber structure, the natural vibration period of the meniscus is made different from the resonance period, half the resonance period, or one-quarter of the resonance period of the common liquid chamber. This suppresses the interaction between the meniscus and the resonant pressure wave. A piezoelectric actuator is used to drive the liquid jet, thus avoiding the enhancement of the resonant pressure wave.
It effectively suppresses the difference in droplet ejection velocity between nozzles, ensuring that the image quality is within the acceptable range, and achieving stable droplet ejection and high-quality printing.
Smart Images
Figure CN117922161B_ABST