Liquid Discharge Head Common Connecting Channel Design
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Solution Overview
Problem
The existing liquid discharge heads face challenges in ensuring sufficient ink flow between channels due to high channel resistance, which can lead to inadequate ink distribution and potential leakage from nozzles.
Innovation Solution
A liquid discharge head design featuring a first and second individual channel row with a common connecting channel that connects both rows, reducing channel resistance and facilitating efficient ink flow between channels, while avoiding leakage by ensuring proper alignment and connection of individual connecting channels to descenders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individually connected return channels are provided for each pressure chamber, then the liquid circulation path is established, but the channel resistance becomes large and liquid flow becomes insufficient
Solution Approach 1:
The patent merges multiple individual return channels into a common return channel that serves multiple pressure chambers. This combining approach increases the total cross-sectional area of the return path, thereby reducing channel resistance and improving liquid flow quantity from the first pressure chamber row to the second pressure chamber row.
2Reliability
If individually connected return channels are provided for each pressure chamber, then the liquid circulation path is established, but the channel resistance becomes large causing liquid to flow backward and leak from nozzles
Solution Approach 1:
The patent merges multiple individual return channels into a common return channel that serves multiple pressure chambers. This combining approach increases the total cross-sectional area of the return path, thereby reducing channel resistance and improving liquid flow quantity from the first pressure chamber row to the second pressure chamber row.
Data Source
AI summary
There is provided a liquid discharging head including: first and second individual channel rows having first individual channels and second individual channels aligned in a first direction, respectively; first and second common channels having first and second connecting parts, respectively; and a connecting channel connecting the plurality of first individual channels and the plurality of second individual channels to one another. The connecting channel has: a common connecting channel which does not have a connecting part with respect to the liquid supply source and which is communicated with the plurality of first individual channels and the plurality of second individual channels; a plurality of first individual connecting channels and a plurality of second individual connecting channels which connect the plurality of first individual channels and the plurality of second individual channels, respectively, to the common connecting channel.