Liquid Discharge Head Cover Grounding via Wiring Member
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Solution Overview
Problem
Existing liquid discharge heads face challenges in effectively managing electrical conductivity and grounding, particularly in preventing the adhesion of charged mist during the liquid discharge process, which can lead to inefficiencies and image quality issues.
Innovation Solution
A liquid discharge head design that incorporates a cover with a grounding pattern electrically connected to a wiring member, which is interposed between the side wall of the head body and the cover, ensuring electrical conductivity and grounding, thereby reducing the adhesion of charged mist.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a cover is mounted on the liquid discharge face of the head body, then the liquid discharge head achieves a compact structure and protects internal components, but the cover may accumulate charged mist and reduce discharge stability
Solution Approach 1:
A wiring member is introduced as an intermediary component between the head body and the cover. This wiring member includes a grounding pattern that electrically connects to the cover, serving as a mediator to transfer electrical grounding from the head body to the cover, thereby preventing mist adhesion without compromising structural compactness
Solution Approach 2:
The cover is equipped with a grounding pattern that automatically grounds itself through the wiring member connected to the head body. This self-grounding mechanism eliminates the need for separate grounding components or complex external grounding systems, maintaining structural simplicity while ensuring discharge stability
2Reliability
If the cover is grounded through a wiring member with grounding pattern, then charged mist adhesion is prevented and discharge stability is improved, but the device complexity increases due to additional wiring components
Solution Approach 1:
The grounding function is merged with the existing cover structure by integrating a grounding pattern directly into the cover. The wiring member combines both electrical connection and grounding functions in a single component, eliminating the need for separate grounding wires or additional grounding structures
Solution Approach 2:
The wiring member serves multiple functions simultaneously: it provides electrical connection between the head body and cover, implements grounding for the cover, and prevents mist adhesion. This multi-functionality reduces the need for multiple separate components, thereby limiting the increase in 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 enhances the stability and quality of liquid discharge by effectively grounding the cover and nozzle plate, preventing mist adhesion and ensuring consistent performance.
Implementation Method 1
The grounding pattern on the wiring member is electrically conducted to the cover with the wiring member interposed between the side wall of the head body and the cover
Data Source
AI summary
A liquid discharge head includes a head body, a cover, a wiring member, and a grounding pattern. The head body has a liquid discharge face in which a nozzle to discharge liquid is disposed. The cover is disposed on the liquid discharge face of the head body. The wiring member has a wiring pattern connected to the head body. The wiring member includes a portion disposed on a side wall of the head body. The grounding pattern on the wiring member is electrically conducted to the cover with the wiring member interposed between the side wall of the head body and the cover.