Rotating Arm Detector for Compact Inkjet Recording Mechanism
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Solution Overview
Problem
Existing recording devices face challenges in reducing the size of the mechanism around the table due to the need for a detection member that protrudes to avoid interfering with the scanning ink jet head.
Innovation Solution
A recording device with a medium support portion, a recording unit, a movement unit, and a detector. The detector includes an arm portion rotatably coupled to the movement unit, a contact portion fixed to one end of the arm, and a displacement detector. The contact portion is positioned to overlap the medium support portion, and the arm rotates upon contact with the medium, with the displacement detector determining the arm's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detection member is disposed at a position outside the scanning range of the ink jet head to avoid interference, then the detection member can function properly, but the mechanism around the table becomes difficult to reduce in size
Solution Approach 1:
The detection member is moved from a lateral position (outside scanning range) to a vertical position (overlapping medium support portion). The arm portion extends vertically downward from the movement unit, allowing detection to occur in the vertical dimension rather than requiring lateral space. This dimensional repositioning enables compact mechanism design while maintaining detection functionality.
Solution Approach 2:
The detection member is integrated within the vertical space above the medium support portion rather than occupying lateral space. The arm portion is positioned to overlap the medium support portion in the horizontal plane, effectively nesting the detection function within the existing vertical structure, thereby reducing overall mechanism footprint.
2Volume of moving object
If the contact portion is positioned to overlap the medium support portion, then the device size is reduced, but the arm portion must rotate during movement which requires precise detection control
Solution Approach 1:
The displacement detector replaces complex mechanical linkage systems with a more compact sensor-based detection mechanism. By using a displacement detector to monitor arm position and rotation, the system achieves precise detection control without requiring complex mechanical guidance structures, thereby reducing device complexity despite the rotating arm configuration.
Solution Approach 2:
The displacement detector provides continuous feedback on the arm portion's position and rotation state. This feedback mechanism enables the control system to monitor and adjust the arm's movement in real-time, ensuring accurate detection even as the arm rotates during the movement unit's travel, thus managing the increased control requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for accurate detection of the medium's height without the need for a protruding detection member, enabling a more compact device design while maintaining effective recording capabilities.
Implementation Method 1
the arm portion rotates about a rotational movement shaft by the contact portion contacting the medium while the movement unit moves, and the displacement detector detects whether the arm portion is at the non-contact position or not
Data Source
AI summary
A recording device including a medium support portion for supporting a medium, a recording unit for recording on the medium, a movement unit configured to move relative to the medium support portion along a first axis, and a detector attached to the movement unit.