Conveyance Unit Opening Authorization for Inkjet Head Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Image forming apparatuses face issues with accidental exposure of inkjet recording heads during maintenance, leading to potential nozzle clogging and deterioration in image quality due to user interaction with the droplet ejecting face, while restrictive opening angles hinder maintenance access.
Innovation Solution
An image forming apparatus with an opening authorization mechanism that limits the conveyance unit's opening angle to prevent user contact with the inkjet recording heads during normal operation, allowing authorized access to a second open position for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the conveyance unit is opened widely to facilitate maintenance access, then maintenance operations become easier, but the droplet ejecting face of the recording head is exposed to the outside, allowing accidental contact and foreign matter adhesion
Solution Approach 1:
The conveyance unit is designed with dynamic opening control, allowing it to be opened to different extents based on operational mode. During normal operation, it opens partially to allow sheet removal. During maintenance mode, it opens fully to allow access to the recording head. This dynamic adjustment resolves the contradiction by adapting the opening degree to the specific operational requirement.
2Object-affected harmful factors
If the opening angle of the conveyance unit is restricted to prevent user contact with the recording head, then image quality is maintained, but maintenance operations are hindered
Solution Approach 1:
The system dynamically adjusts the conveyance unit opening angle based on the operational state. A control mechanism detects whether the apparatus is in normal operation or maintenance mode and accordingly permits different opening angles. This resolves the contradiction by allowing restricted opening during normal operation to prevent contamination, while permitting full opening during maintenance mode to facilitate service access.
3Ease of operation
If the conveyance unit opens partially during normal operation, then sheet jam removal is enabled, but the recording head remains partially exposed creating contamination risk
Solution Approach 1:
The conveyance unit implements dynamic opening control that adjusts its opening degree based on operational requirements. During normal operation, it opens to a controlled extent that allows sheet removal while maintaining protection of the recording head. This dynamic adjustment resolves the contradiction by optimizing the opening angle for each operational context.
Data Source
AI summary
An image forming apparatus includes an apparatus body; an openable and closable cover provided at the apparatus body; a conveyance unit to convey a recording medium upward and downward; a recording head to eject liquid droplets to the recording medium conveyed by the conveyance unit; and an opening authorization mechanism to authorize moving of the conveyance unit from a first open position to a second open position, the conveyance unit having a greater opening amount at the second open position than at the first open position, wherein the conveyance unit is disposed between the cover and the recording head, and configured to be openable to the first open position when the cover is in the open position, and openable to the second open position when the opening authorization mechanism authorizes the moving of the conveyance unit from the first open position to the second open position.