Printhead Cleaning Unit Lockout to Prevent Belt Collision
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Solution Overview
Problem
Existing recording devices face issues of collision and damage due to the cleaning unit entering the movement region of the recording unit or support portion, which can occur due to vibration, inclination, or accidental human interaction, leading to mechanical failures and abnormalities.
Innovation Solution
A recording device with a cleaning unit that moves forward and backward in a direction intersecting the movement direction of the recording unit and support portion, and a restriction mechanism to prevent movement into non-cleaning regions when not in use, ensuring safe and controlled maintenance operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cleaning unit is made movable to perform maintenance on the recording unit, then the ease of operation is improved, but the risk of collision and damage increases
Solution Approach 1:
The cleaning unit is designed to be movable along the conveyance direction, allowing it to dynamically adjust its position between a maintenance position (facing the recording unit) and a retracted position (away from the movement region). This dynamic positioning enables the cleaning unit to perform maintenance when needed while avoiding collision during normal operation.
Solution Approach 2:
A restriction portion is introduced as an intermediary mechanism that physically prevents the cleaning unit from entering the movement region of the recording unit. This intermediary structure ensures that even if the cleaning unit is accidentally pushed or moves due to vibration, it cannot collide with the recording unit.
2Ease of operation
If the cleaning unit moves freely in the cleaning region, then the ease of operation is improved, but the risk of mechanical damage increases
Solution Approach 1:
The cleaning unit is designed to be movable along the conveyance direction, allowing it to dynamically adjust its position between a maintenance position (facing the recording unit) and a retracted position (away from the movement region). This dynamic positioning enables the cleaning unit to perform maintenance when needed while avoiding collision during normal operation.
Solution Approach 2:
The restriction portion is positioned in advance to preemptively block the cleaning unit from entering the movement region. This preliminary anti-action prevents potential collision before it can occur, even under conditions like vibration or accidental pushing.
3Ease of operation
If the cleaning unit is positioned to face the recording unit for maintenance, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The cleaning unit's movement function is merged with the existing conveyance system. By moving the cleaning unit along the conveyance direction (the same direction in which the medium is conveyed), the patent utilizes the existing movement infrastructure rather than adding a separate, complex movement mechanism.
Data Source
AI summary
A recording device includes a recording unit, a transport belt configured to support the medium, and a moving mechanism configured to move at least one of the recording unit or the transport belt with respect to the other in a movement direction. The recording device includes a cleaning unit provided in a manner movable forward and backward with respect to a position between the recording unit and the transport belt in a first direction intersecting the movement direction. The cleaning unit is configured to, when the recording unit is located at a to-be-cleaned position, start moving from a non-cleaning region and move in a cleaning region in the first direction, thereby cleaning the ejecting unit. A restriction portion configured to restrict movement of the cleaning unit is located in the non-cleaning region to the cleaning region when the cleaning unit does not perform cleaning.