Liquid Ejecting Head Cover Deformation Detection
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Solution Overview
Problem
The cover of a liquid ejecting head, such as an inkjet printer, can deform due to collisions or other causes, leading to printing defects.
Innovation Solution
A liquid ejecting head with a cover that includes a detection element to detect deformation, and a notification unit to alert users of anomalies based on the detection signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover is added to protect the droplet ejection face, then protection and structural completeness are improved, but the cover may deform due to collisions or other causes, resulting in printing defects
Solution Approach 1:
The patent applies preliminary action by detecting cover deformation before it causes printing defects. The detection element monitors the cover state in advance, allowing the system to identify potential issues before they affect print quality, thus preventing the worsening of printing precision while maintaining the protective function of the cover.
2Manufacturing precision
If deformation detection is added to the liquid ejecting head, then printing quality and reliability are improved by detecting cover deformation, but device complexity increases
Solution Approach 1:
The detection element is integrated into the existing cover structure, allowing the cover to serve dual functions: protection of the droplet ejection face and deformation monitoring. This multi-functionality approach adds detection capability without significantly increasing overall device complexity, as the same structural component performs multiple roles.
Solution Approach 2:
The detection element acts as an intermediary between the cover and the control system. It translates physical deformation of the cover into detectable signals, enabling indirect monitoring of cover state without requiring direct measurement of printing quality. This intermediary approach adds minimal complexity while effectively improving printing precision through early deformation detection.
Data Source
AI summary
A liquid ejecting head includes a head chip, a cover to which the head chip is fixed, and a detection element configured to detect a deformation of the cover.