Liquid Discharge Head Wiring Substrate Orientation
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Solution Overview
Problem
Existing liquid discharge heads face challenges in miniaturization and assembly due to the size and orientation of wiring substrates, which hinder efficient signal and power supply to multiple nozzle arrays while maintaining a compact design.
Innovation Solution
The liquid discharge head incorporates a first wiring substrate extending from the body with a bend, allowing it to connect perpendicularly to a second wiring substrate, enabling miniaturization by reducing the body's size perpendicular to the nozzle array and allowing for a wider connection to the outside, while the second wiring substrate is oriented along the longitudinal direction to accommodate a larger connector with more pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single large wiring substrate is used to supply signals to multiple nozzle arrays, then the signal supply coverage is improved, but the device size and assembly complexity increase
Solution Approach 1:
The wiring substrate is divided into multiple independent wiring substrates, each responsible for supplying signals to specific nozzle arrays. This segmentation allows for modular assembly, reducing overall assembly complexity while maintaining comprehensive signal supply coverage across all nozzle arrays.
2Adaptability or versatility
If the wiring substrate is oriented along the longitudinal direction to accommodate more pins, then the connector capacity is improved, but the device width increases
Solution Approach 1:
The wiring substrate utilizes the width dimension of the device body to extend along the longitudinal direction, accommodating more pins without increasing the device width. This dimensional optimization allows the connector capacity to be improved while maintaining a compact device footprint.
3Ease of operation
If the wiring substrate is pulled out along the short side, then the connection to outside is improved, but the body size in longitudinal direction increases
Solution Approach 1:
The wiring substrate is asymmetrically configured with different orientations for different functional regions. The connection portion extends along the short side for improved accessibility, while the signal supply portion extends along the longitudinal direction. This asymmetric design optimizes both connection ease and body size optimization.
Data Source
AI summary
A liquid discharge head includes a body to discharge liquid, a first wiring substrate extending from the body, and a second wiring substrate electrically connected to the first wiring substrate. The body includes a nozzle face in which a plurality of nozzles, from which the liquid is discharged, is formed. The second wiring substrate is disposed along a direction perpendicular to the nozzle face of the body, a principal surface of the first wiring substrate is disposed along a short side of the body, and a principal surface of the second wiring substrate is disposed along a longitudinal direction of the body.