Developer Cartridge Electrode Stacking for Stable Bias
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Solution Overview
Problem
The reduction in size of developer cartridges for image-forming devices poses challenges in stabilizing the positioning of electrodes, leading to unreliable connections due to space constraints and potential overlap with the cap, affecting the bias voltage application.
Innovation Solution
A developer cartridge design that includes a case with a toner fill-hole, a developer carrying member, a supplying member, a cap for sealing, and a fixing member to securely position and fix the electrodes relative to the cap, ensuring stable electrode placement and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the developer cartridge is reduced in size, then the cartridge becomes more compact and space-efficient, but the positioning stability of electrodes deteriorates due to space constraints and potential overlap with the cap
Solution Approach 1:
The patent transitions from arranging electrodes side-by-side on the same surface to stacking them in the vertical direction. The first electrode is arranged on the side surface, while the second electrode is arranged on the end surface, utilizing the third dimension (depth/vertical direction) to resolve spatial conflict. This dimensional reorganization allows both electrodes to coexist without overlap even in compact cartridges.
Solution Approach 2:
The patent divides the electrode arrangement into separate spatial zones: one electrode occupies the side surface area while the other occupies the end surface area. This segmentation of spatial usage prevents interference between electrodes and maintains positioning stability regardless of cartridge size reduction.
2Volume of moving object
If the cap is positioned closer to the developing roller and supply roller due to smaller hopper size, then the cartridge maintains compact dimensions, but the arrangement of electrodes next to the cap becomes difficult and positioning stability deteriorates
Solution Approach 1:
The patent resolves the arrangement difficulty by utilizing different surfaces (side surface vs. end surface) and the vertical dimension. This eliminates the need for complex lateral positioning next to the cap, as electrodes are distributed across different spatial planes, simplifying the arrangement process even when the cap position changes.
3Area of stationary object
If electrodes are arranged to overlap the cap, then space utilization improves, but positioning stability becomes unreliable leading to poor connection quality
Solution Approach 1:
The patent extracts the second electrode from the side surface plane and relocates it to the end surface. This separation removes the overlapping conflict with the cap entirely, ensuring that electrode positioning is not compromised by cap presence while still achieving compact space utilization through three-dimensional distribution.
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 maintains the stability of electrode positions, ensuring reliable connections and consistent bias voltage application, enhancing the performance and reliability of the image-forming process.
Implementation Method 1
The fixing member is configured to fix the electrode to the cap such that the electrode is disposed in superposed relation to the cap in the particular direction upon fixing with the fixing member
Implementation Method 2
The electrode is configured to supply a bias voltage to at least one of the developer carrying member and the developer supplying member
Implementation Method 3
The cap is configured to seal the toner fill-hole
Data Source
AI summary
A developer cartridge includes a case, a developer carrying member, a developer supplying member, a cap, an electrode, and a fixing member. The case has a first side wall formed with a toner fill-hole and a second side wall facing the first side wall in a particular direction. The cap is configured to seal the toner fill-hole. The electrode is configured to supply a bias voltage to at least one of the developer carrying member and the developer supplying member. The fixing member is configured to fix the electrode to the cap such that the electrode is disposed in superposed relation to the cap in the particular direction.