Ink Supply Device Radial Magnetic Float Position Detection
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Solution Overview
Problem
Conventional ink supply devices for inkjet recording devices face limitations in stably detecting the position of the float due to restricted setting positions of magnetic detection sensors, which affects the accurate detection of ink levels and pressure in the ink storage section.
Innovation Solution
The ink supply device incorporates a floating position detection system where the magnetic detection sensors are arranged on a wall orthogonal to the rotating shaft of the float, allowing for a wider range of detection and maintaining a constant separation distance, enabling stable detection of the float's position and thus the ink level, using a configuration with a permanent magnet as the detection target and magnetic detection sensors as the target detection section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the magnetic detection sensor is arranged on the vertical wall or bottom wall of the ink storage section along the axial direction of the rotating shaft, then the detection structure is simple, but the setting position of the sensor is restricted and stable detection cannot be achieved
Solution Approach 1:
The magnetic detection sensor is arranged on a radial wall (side wall) of the ink storage section instead of the vertical wall or bottom wall, changing the detection dimension from axial to radial direction. This allows the sensor to detect the float's position through the side wall while the float rotates around the axial shaft, achieving stable detection without restricting sensor placement.
2Measurement precision
If the magnetic detection sensor is arranged to detect the float position, then ink level detection is enabled, but the sensor setting position is restricted affecting detection accuracy
Solution Approach 1:
By placing the magnetic detection sensor on the radial side wall and detecting the float's position in the radial direction during its rotation around the axial shaft, the system achieves versatile sensor placement options while maintaining accurate ink level detection through the float's periodic passage near the sensor.
3Reliability
If the float is arranged to float on the ink surface, then ink level indication is achieved, but the detection system requires complex arrangement to ensure stable detection
Solution Approach 1:
Instead of having the detection sensor move with the float or having the float move to a specific detection point, the invention inverts the approach by keeping the sensor stationary on the side wall and having the float rotate past it. This simplifies the detection system while ensuring stable detection through the float's periodic passage near the sensor.
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 ink surface over a wide range, enhancing the stability and reliability of ink level monitoring and pressure control in the ink supply device, thereby improving the overall performance of the inkjet recording process.
Implementation Method 1
a float which floats corresponding to a height of a liquid surface of the ink is arranged in the ink storage section in a floatable manner
Implementation Method 2
The floating position detection device is provided with a permanent magnet serving as a detection target arranged on the float and a magnetic detection sensor serving as a target detection section
Data Source
AI summary
In accordance with an embodiment, an ink supply device comprises an ink storage section, a float and a floating position detection device. The ink storage section is connected with an inkjet head, and stores ink to be supplied to the inkjet head. The float is arranged in the ink storage section in a floatable manner in response to a height of a liquid surface of the ink. The floating position detection device comprises a detection target arranged on the float, and a target detection section which is arranged in the ink storage section and detects that the detection target approaches. The target detection section is arranged on a wall substantially orthogonal to an axial direction of a rotating shaft of the ink storage section. An inkjet recording device of the embodiment comprises an inkjet head configured to jet ink to an image receiving medium, and the ink supply device.