Liquid Ejecting Head Terminal Relocation for Compact Transport
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Solution Overview
Problem
Ink jet type recording heads face challenges in minimizing dimensions in the paper transporting direction, leading to unstable paper transportation and deteriorated printing quality, especially when trying to achieve high resolution and miniaturization.
Innovation Solution
A liquid ejecting head design featuring a plurality of actuator units with connection terminal rows, an interconnection substrate extending in a direction perpendicular to the transporting direction, and liquid flow passages arranged on both sides of the substrate, with external connection terminals positioned between the flow passages to reduce overall dimensions and enhance transportation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the liquid ejecting head is miniaturized to achieve high resolution, then manufacturing precision is improved, but paper transportation stability deteriorates
Solution Approach 1:
The patent repositions the external connection terminal row from a conventional location to an outer side in the transporting direction of the interconnection substrate. This dimensional relocation allows the terminal row to be arranged between liquid flow passages without increasing the overall dimension in the transporting direction, thereby achieving miniaturization while maintaining stable paper transportation and high printing quality
2Productivity
If the dimension in the transporting direction is reduced for miniaturization, then productivity is improved, but paper transportation accuracy deteriorates
Solution Approach 1:
The external connection terminal row is relocated to an outer side in the transporting direction and arranged between liquid flow passages. This dimensional reorganization reduces the overall dimension in the transporting direction, achieving miniaturization while maintaining sufficient space for stable paper transportation and high transportation accuracy
3Productivity
If actuator units are arranged densely to improve productivity, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The external connection terminal row is positioned between liquid flow passages on the interconnection substrate, allowing actuator units to be arranged densely in other directions without increasing overall complexity. This spatial optimization enables high-density actuator unit arrangements while maintaining manageable device complexity
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 allows for miniaturization of the liquid ejecting head, improving sheet transportation accuracy and printing quality by reducing the dimension in the transporting direction and enabling high-density actuator unit arrangements.
Implementation Method 1
a head main body that deforms a pressure generating chamber communicating with a nozzle opening, through which ink droplets are ejected, by using a pressure generating unit such as a piezoelectric element
Data Source
AI summary
Provided is a liquid ejecting head including: a plurality of actuator units, each including a connection terminal row; an interconnection substrate which is disposed to face the plurality of actuator units, is electrically connected to the connection terminal row of each of the plurality of actuator units, and extends in a second direction intersecting a first direction that is a transporting direction of a recording sheet; an external connection terminal row which is provided to the interconnection substrate; and a plurality of liquid flow passages which supply a liquid to each of the plurality of actuator units. The plurality of liquid flow passages are arranged on an outer side of the interconnection substrate in the first direction, and the external connection terminal row is arranged between the plurality of liquid flow passages in the second direction.