Developing Cartridge Electrode Protrusion Nesting
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Solution Overview
Problem
Developing cartridges for electro-photographic image forming apparatuses require enhanced mechanical strength for their electrodes to prevent breakage, especially when they protrude outside and are subject to potential drops.
Innovation Solution
The developing cartridge design includes a casing with a protrusion and an electrode configuration where the electrode is electrically connected to the developing roller shaft, featuring a reinforcement protrusion that enhances the mechanical strength by providing additional rigidity and support, allowing the electrode to be securely attached to the casing and connected to the image forming apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the developing electrode protrudes outside to contact the apparatus electrode, then electrical connectivity is achieved, but mechanical strength decreases and breakage risk increases
Solution Approach 1:
The first protrusion from the casing is positioned inside the inner space of the second protrusion from the electrode, creating a nested structure where the electrode protrusion is supported by the casing protrusion, thereby strengthening the electrode while maintaining electrical contact capability
Solution Approach 2:
The developing electrode is made from electro-conductive resin material that combines electrical conductivity with mechanical strength properties, creating a composite structure that satisfies both electrical and mechanical requirements
Data Source
AI summary
A developing cartridge may include a casing, a developing roller, a first protrusion, and an electrode. The casing may be configured to accommodate developer therein. The developing roller may include a developing roller shaft extending in a first direction. The first protrusion may be positioned at an outer surface of the casing. The first protrusion may protrude outward from the outer surface in the first direction. The electrode may be positioned at the outer surface. The electrode may be configured to be electrically connected to the developing roller shaft. The electrode may include a second protrusion protruding outward in the first direction. The second protrusion may have an inner space extending in the first direction. The inner space may be positioned in the second protrusion. The first protrusion may be positioned in the inner space.