Image Forming Device Cover Open Detection Logic
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Solution Overview
Problem
Existing image forming devices reset their ASICs unnecessarily when the cover is opened briefly, leading to reduced printing efficiency due to unnecessary time spent restoring the ASIC from the reset state.
Innovation Solution
An image forming device with a processor, image forming unit, cover, detector, and interrupting unit that only interrupts data processing if the cover is kept open for a predetermined time period, and maintains processing if the cover is opened for less than that period, preventing unnecessary resets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ASIC is reset whenever the cover is opened, then electrostatic malfunctions are prevented, but printing efficiency deteriorates due to unnecessary resets during brief cover openings
Solution Approach 1:
The system dynamically adjusts the reset behavior based on the duration of cover opening. The detector monitors how long the cover remains open, and only triggers a reset when the opening exceeds a predetermined threshold time, allowing brief openings without unnecessary resets
Solution Approach 2:
The system changes the operational parameter (reset state) based on the time parameter of cover opening. By comparing the actual opening duration against a threshold value, the system selectively applies the reset function only when electrostatic protection is genuinely needed
2Speed
If the cover opening detection is immediately responsive, then electrostatic protection is activated quickly, but unnecessary resets occur during brief cover openings
Solution Approach 1:
The detector continuously monitors the cover state and prepares to trigger the reset function, but the actual reset action is delayed until the cover opening duration exceeds the predetermined threshold, preventing premature resets while maintaining readiness for genuine protection needs
Data Source
AI summary
An image forming device includes a processor configured to process image data, an image forming unit configured to perform image formation based on the image data processed by the processor, a cover configured to, when being opened, allow an external access to the image forming unit therethrough, a detector configured to detect whether the cover is opened, and an interrupting unit configured to, when determining with the detector that the cover is kept opened for a first time period, interrupt the processing of the image data by the processor.