Replaceable Toner Unit with Magnetic Sensor Contact Alignment
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Solution Overview
Problem
Existing electrophotographic image forming devices face challenges in accurately positioning replaceable units with electrical contacts for reliable communication, as the replaceable units typically have a shorter lifespan than the device and require precise alignment for effective operation.
Innovation Solution
The solution involves a replaceable unit with a housing containing a magnetic sensor and electrical contact that moves into an operative position aligned with a magnet's path, ensuring unobstructed contact with the device's electrical contacts, facilitated by a pivotable electrical connector and magnetic sensor alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrical connector is fixed in position, then the structure is simple, but the electrical contacts cannot be reliably aligned with the image forming device
Solution Approach 1:
The electrical connector is designed to be movable between a retracted position and an operative position, allowing it to dynamically adjust its location. This enables reliable alignment with the image forming device's electrical contacts during installation while maintaining structural simplicity through a single degree of freedom movement mechanism.
2Measurement precision
If the magnetic sensor is fixed, then the structure is simple, but the sensor cannot accurately detect the magnet's position during rotation
Solution Approach 1:
The magnetic sensor is positioned on the movable electrical connector, allowing it to dynamically adjust its location relative to the magnet. This enables accurate detection of the magnet's position and rotation state while maintaining structural simplicity, as the sensor's movement is coupled with the connector's single degree of freedom.
3Reliability
If the electrical contact is obstructed from below, then protection is improved, but contact with the image forming device is prevented
Solution Approach 1:
The electrical connector moves from a retracted position where it is protected to an operative position where it is exposed from below. This dynamic positioning allows the electrical contact to be protected during storage while enabling reliable contact with the image forming device during installation and operation.
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 design ensures reliable and precise alignment of electrical contacts, enhancing communication between the replaceable unit and the image forming device, improving operational efficiency and reducing the risk of misalignment and damage.
Implementation Method 1
A magnetic sensor on the housing is aligned with a point in a path of movement of the magnet for sensing a magnetic field of the magnet when the magnet passes the magnetic sensor
Data Source
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AI summary
A replaceable unit for an electrophotographic image forming device includes a housing having a reservoir for holding toner. An outlet is in fluid communication with the reservoir for exiting toner from the replaceable unit. An interface gear is provided on the housing, at least a portion of which mates with a corresponding drive gear to receive rotational force from the drive gear. A magnet is movable in response to rotation of the interface gear. A magnetic sensor on the housing is aligned with a point in a path of movement of the magnet for sensing a magnetic field of the passing magnet. An electrical contact is provided on the housing for contacting a corresponding electrical contact in the image forming device. The electrical contact in the image forming device is electrically connected to the magnetic sensor to convey an output thereof to a controller of the image forming device when the electrical contact of the replaceable unit is in contact with the corresponding electrical contact in the image forming device. The electrical contact of the replaceable unit faces downward and is unobstructed from below permitting the corresponding electrical contact in the image forming device to contact the electrical contact of the replaceable unit from below.