Inkjet Cover Sensor Positional Logic for Ink Injection Control
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Solution Overview
Problem
Conventional inkjet recording apparatuses lack effective mechanisms for determining when ink levels in refillable ink chambers are low, leading to potential air entry and printing issues due to incomplete ink injection.
Innovation Solution
An inkjet recording apparatus with an ink tank, cover, cover sensor, monitor, and controller that allows for decision processes based on positional signals from the cover sensor to ensure complete ink injection into the ink chamber, preventing air entry and maintaining optimal ink levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ink injection is performed without a decision mechanism, then the operation is simple, but air may enter the ink flow path causing printing issues
Solution Approach 1:
The system performs preliminary detection of ink levels before initiating ink injection operations. The detection unit measures the ink level in advance, and the control unit uses this information to decide whether to proceed with injection, preventing air entry before it occurs.
Solution Approach 2:
The system implements a feedback mechanism where the detection unit continuously monitors ink levels and provides information to the control unit. Based on this feedback, the control unit adjusts the ink injection process, stopping or continuing injection according to real-time ink level conditions.
2Reliability
If ink level detection is implemented, then air entry is prevented, but the device complexity increases
Solution Approach 1:
The inkjet recording apparatus performs self-monitoring of ink levels through its built-in detection unit. The system serves itself by automatically detecting ink levels and controlling the injection process without requiring external monitoring equipment or complex external control systems.
Solution Approach 2:
The control unit serves multiple functions: it controls the ink injection process, interprets detection signals from the detection unit, makes decision processes about injection timing, and manages the overall printing operation. This multi-functionality reduces the need for separate dedicated components.
3Manufacturing precision
If continuous monitoring of ink levels is performed, then printing quality is maintained, but energy consumption increases
Solution Approach 1:
The detection unit performs ink level detection at periodic intervals rather than continuously. The control unit initiates detection at specific times (before injection, during injection phases) based on the printing operation state, reducing energy consumption while maintaining print quality through timely measurements.
Data Source
AI summary
An inkjet recording apparatus includes an ink tank forming an ink chamber and including an injection inlet, a cover, a cover sensor, a recording head, a monitor, and a controller. The cover is movable between a covering position and an exposing position. The cover sensor is positioned to output a signal depending on the position of the cover. The controller controls operation of the recording head, the monitor. The controller receives either a first positional signal or a second positional signal of the cover sensor, and based on receipt of the first positional signal after receipt of the second positional signal from the cover sensor, performs a decision process deciding whether an operation regarding ink injection into the ink chamber is completed.