Liquid Discharging Head Channel Segmentation for Bubble Clogging
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Solution Overview
Problem
The existing liquid discharging heads with complex and small channel cross-sectional areas are prone to clogging by air bubbles, leading to unsatisfactory liquid supply to the nozzles.
Innovation Solution
A simplified configuration of the distribution channel design with larger cross-sectional areas and specific channel arrangements, including distributing channels and common channels, to prevent clogging and ensure reliable ink supply to the nozzles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the distributing channels are designed with complex shapes to accommodate six slits for flexible wiring boards, then the wiring board insertion is enabled, but the channel cross-sectional area becomes small which causes air bubble clogging and unsatisfactory liquid supply
Solution Approach 1:
The patent divides the channel system into two independent parts: distributing channels (with simple linear shapes) and common channels (with comb-teeth like shapes). This segmentation allows the distributing channels to maintain large cross-sectional areas for reliable liquid supply, while the common channels accommodate the complex wiring board insertion paths, thus resolving the contradiction between wiring adaptability and liquid supply reliability.
Solution Approach 2:
The patent reorganizes the channel layout by separating functions into different spatial dimensions. The distributing channels extend in a first direction with simple geometry, while the common channels extend in a second direction orthogonal to the first, creating a three-dimensional channel network that avoids the conflict between simple channel geometry and complex wiring board accommodation.
2Volume of moving object
If the distributing channels have small cross-sectional areas to fit within the head structure, then the head size is reduced, but air bubbles easily clog the channels causing failure of liquid supply
Solution Approach 1:
By segmenting the channel system into distributing channels with large cross-sectional areas and common channels that route around wiring boards, the patent enables large channel dimensions without increasing overall head volume excessively. The segmented design allows liquid to flow through wide distributing channels while the common channels manage the spatial constraints, reducing air bubble clogging risk.
Solution Approach 2:
The common channels act as intermediary pathways that connect the distributing channels to the nozzles while routing around the wiring boards. This intermediary structure allows the distributing channels to maintain large cross-sectional areas for bubble-free liquid supply, while the common channels accommodate the spatial constraints of the compact head design.
3Adaptability or versatility
If the channels are arranged in a comb-teeth like shape to avoid six slits, then wiring board insertion is enabled, but the channel configuration becomes complex increasing manufacturing difficulty
Solution Approach 1:
The patent segments the channel system into two parts with different geometries optimized for their respective functions. The distributing channels have simple linear shapes that are easy to manufacture, while the common channels have the comb-teeth like shapes needed for wiring board accommodation. This segmentation allows each channel type to be manufactured using appropriate techniques without requiring the entire system to be fabricated with complex geometry.
Solution Approach 2:
The patent combines simple linear distributing channels with comb-teeth like common channels into a unified channel system. This merging allows the simple distributing channels to be manufactured easily while the common channels provide the necessary complexity for wiring board compatibility, achieving both ease of manufacture and wiring adaptability in the overall system.
Data Source
AI summary
A liquid discharging head includes a channel member having a nozzle surface formed with first nozzles, second nozzles, third nozzles and fourth nozzles. The channel member is formed with: a first distributing channel communicating with a first storage chamber and extending in a first direction, a second distributing channel communicating with a second storage chamber, extending in the first direction, and arranged side by side to the first distributing channel in a second direction, a first common channel communicating with the first nozzles, a second common channel communicating with the second nozzles, a third common channel communicating with the third nozzles, and a fourth common channel communicating with the fourth nozzles. The first to fourth common channels each extend in a third direction crossing the first and second directions, and partially overlaps with the first and second distributing channels in a fourth direction orthogonal to the nozzle surface.