Developing Guide Structure for Wear-Resistant Cartridge Memory Contact
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Solution Overview
Problem
In conventional image forming apparatuses, the electrical contact surface of the developing cartridge's memory is prone to wear due to frictional contact with the body housing's developing memory terminal during attachment and detachment, which can lead to operational issues.
Innovation Solution
The image forming apparatus incorporates a developing guide that moves together with the developing cartridge between contact and separation positions, ensuring the developing memory terminal maintains consistent contact with the developing memory without causing wear, and reduces the need for direct electrical connections at the support wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the developing cartridge is made detachable for maintenance and replacement, then ease of operation is improved, but the electrical contact surface of the memory is worn away due to frictional contact with the memory terminal
Solution Approach 1:
The patent introduces a guide member as an intermediary component that mediates between the developing cartridge and the main body housing during attachment and detachment. The guide member includes a guide surface that guides the developing cartridge, and a memory terminal that contacts the developing cartridge's memory. By positioning the memory terminal on the guide member rather than directly on the housing, the patent reduces frictional wear on the electrical contact surfaces while still enabling reliable data transfer. The guide member acts as a buffer that reduces direct friction between moving and stationary parts.
2Adaptability or versatility
If the developing cartridge moves up and down for contact with photosensitive drum, then functionality is improved, but frictional contact causes wear on the memory electrical contact surface
Solution Approach 1:
The guide member serves as an intermediary that allows the developing cartridge to move vertically for photosensitive drum contact while protecting the memory contact surface. The guide member's memory terminal is positioned to contact the developing cartridge's memory in a way that minimizes friction during vertical movement. The guide surface on the guide member guides the developing cartridge's movement, ensuring proper alignment while reducing direct friction between the cartridge and housing structures.
Solution Approach 2:
The patent segments the contact and guidance functions into separate components. The guide member handles the mechanical guidance and memory contact, while the developing cartridge handles the photosensitive drum contact. This segmentation allows each component to be optimized for its specific function, with the guide member's memory terminal designed to minimize friction during the cartridge's vertical movement cycle.
Data Source
AI summary
An image forming apparatus includes: a main body housing; a developing cartridge attachable to and detachable from the main body housing; a drum cartridge attachable to and detachable from the main body housing; and a developing guide for guiding attachment and detachment of the developing cartridge to and from the main body housing. The developing cartridge includes a developing roller and a developing memory for storing information. The drum cartridge includes a photosensitive drum. The developing guide is movable together with the developing cartridge between a first position where the developing roller is in contact with the photosensitive drum and a second position where the developing roller is separated from the photosensitive drum. The developing guide includes a developing memory terminal configured to be in contact with the developing memory in a state where the developing cartridge is attached to the main body housing.