Toner Cartridge Shutter Lock Mechanism Preventing Leakage
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Solution Overview
Problem
The existing toner cartridges for image forming devices often experience unintended toner release due to accidental or improper activation of the shutter mechanism, leading to uncleanliness and potential print defects when the imaging unit is not present, causing toner to leak into the device's internal components.
Innovation Solution
A toner cartridge with a shutter lock mechanism that includes a linkage system and a rotatable interlock member, which remains locked unless the toner cartridge is properly installed with the imaging unit, preventing the shutter from opening unless both are correctly aligned, thus ensuring toner containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shutter is biased toward the closed position to prevent unwanted toner release, then toner containment is improved, but the shutter may fail to open reliably when the toner cartridge is installed in the image forming device
Solution Approach 1:
The linkage mechanism is pre-configured with a catch feature that automatically engages with the interlock member when the toner cartridge is installed. The biasing force is applied in advance to keep the shutter closed, but the preliminary arrangement of the linkage ensures that upon installation, the catch will engage and overcome the bias to open the shutter reliably.
Solution Approach 2:
The biasing member applies a preliminary opposing force to counteract the automatic opening tendency. This preliminary anti-action ensures the shutter remains closed during handling and installation, but the force is calibrated so that the engagement feature on the image forming device can overcome it when properly installed.
2Ease of manufacture
If the shutter mechanism is simplified to reduce complexity, then ease of manufacture is improved, but the risk of accidental toner release increases
Solution Approach 1:
The shutter mechanism is segmented into distinct functional components: a shutter member for sealing, a linkage mechanism for actuation, a biasing member for maintaining closed position, and an interlock member with catch and engagement features. This segmentation allows each component to be simple in itself while collectively providing reliable accidental release prevention.
Solution Approach 2:
The linkage mechanism acts as an intermediary between the engagement feature on the image forming device and the shutter member. It transmits the opening force while the biasing member serves as an intermediary force element that maintains the shutter in the closed position until properly actuated, preventing accidental release.
3Adaptability or versatility
If the toner cartridge is designed to work with a separate imaging unit, then adaptability is improved, but the risk of toner leakage into the device interior increases when the imaging unit is absent
Solution Approach 1:
The interlock member is pre-positioned with the catch feature ready to engage with the engagement feature on the image forming device. The linkage mechanism is pre-arranged so that when the toner cartridge is installed in the device, the engagement feature will automatically actuate the linkage to open the shutter, preventing toner leakage into the device interior.
Solution Approach 2:
The linkage mechanism serves as an intermediary that connects the installation action (engagement of the toner cartridge with the device) to the shutter opening action. This ensures that the shutter only opens when the toner cartridge is properly installed with the imaging unit present, preventing toner leakage into the device interior while maintaining adaptability to work with separate imaging units.
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
The shutter lock mechanism effectively prevents unwanted toner release by ensuring the shutter remains closed unless the toner cartridge is correctly installed, reducing the risk of toner leakage and print defects, and allowing users to safely close the device's access door without opening the shutter when the imaging unit is absent.
Implementation Method 1
A shutter linkage is provided that includes an engagement surface for engagement with an engagement feature on the image forming device to open the shutter. A biasing member is connected to the shutter linkage and biased to prevent engagement of the shutter linkage with the engagement feature.
Implementation Method 2
A rotatable interlock member is pivotally attached to a side wall of the housing. The rotatable interlock member has a first leg extending radially from a pivot axis of the rotatable interlock member and operatively engaged with the second linkage member. The rotatable interlock member also has a second leg extending radially from the pivot axis of the rotatable interlock member. The second leg includes a second engagement surface exposed to an exterior of the front portion of the housing to receive an engagement feature on the imaging unit.
Data Source
AI summary
A toner cartridge according to one example embodiment includes a housing having a reservoir for containing toner and an exit port in fluid communication therewith. A movable shutter is positioned at the exit port. A linkage is operatively connected to the shutter to open the shutter upon being actuated by a first engagement feature in the image forming device. The linkage includes a first linkage member positioned to receive the first engagement feature and a second linkage member connected to the shutter. An interlock is operatively engaged with the linkage and biased toward a locked position preventing the second linkage member from opening the shutter but permitting the first linkage member to move relative to the second linkage member. The interlock is movable to an unlocked position upon being actuated by a second engagement feature in the image forming device that permits the second linkage member to open the shutter.