Process Cartridge Contact Layout for Stable Chip Connections
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Solution Overview
Problem
Existing image-forming apparatuses face issues with complex structures and poor connection stability between process cartridge chips due to uneven contact forces, leading to potential damage and operational challenges.
Innovation Solution
The process cartridge design includes distinct reference planes for electrical contacts on each cartridge, ensuring balanced contact forces and reduced wear by varying the minimum distances between electrical contacts and reference planes, along with a moving part for smoother installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electrical contacts of multiple process cartridge chips are arranged on the same plane, then the structure is simplified, but the contact force becomes uneven and connection stability deteriorates
Solution Approach 1:
The patent transitions from arranging all electrical contacts on the same plane (2D arrangement) to distributing contacts across different planes (3D arrangement). Specifically, contacts are positioned at different distances from a reference plane, creating a stepped or multi-level configuration that enables both structural simplicity and reliable connections.
2Reliability
If a movable part connected to the contact detection part is disposed inside the image-forming apparatus, then the contact detection function is achieved, but the structure becomes complex and prone to damage
Solution Approach 1:
The patent extracts the movable part from the image-forming apparatus and relocates it to the process cartridge itself. The process cartridge includes a movable part that can move relative to the cartridge body, carrying the electrical contacts. This extraction simplifies the image-forming apparatus structure while maintaining the contact detection function through the cartridge's own movable mechanism.
Solution Approach 2:
The process cartridge becomes self-sufficient by incorporating its own movable part and electrical contact system. The cartridge's movable part automatically engages with the contact detection part of the image-forming apparatus during installation, eliminating the need for separate detection mechanisms in the apparatus and enabling the cartridge to perform its own identification and connection functions.
3Ease of manufacture
If electrical contacts are arranged on the same plane, then manufacturing is easier, but wear distribution becomes uneven and durability decreases
Solution Approach 1:
The patent applies different spatial positions (different distances from the reference plane) to different electrical contacts, creating local variations in the contact arrangement. This local differentiation ensures that each contact experiences optimized contact conditions, leading to more uniform wear distribution across all contacts while maintaining manufacturing feasibility through a systematic stepped pattern.
Data Source
AI summary
The present disclosure provides a process cartridge, a process cartridge group and an image-forming apparatus. The process cartridge includes a driving portion, configured to receive a driving force from a driving apparatus in the image-forming apparatus; an image-forming structural part, configured to be connected to the driving portion; and an information identification part, including a plurality of electrical contacts electrically connected to the image-forming apparatus. When the process cartridge is installed in the image-forming apparatus, a minimum distance between any electrical contact of the information identification part and a side plate of the image-forming apparatus adjacent to the driving portion is H, and a value of the distance H is determined corresponding to attribute information of the process cartridge and/or an installation position of the process cartridge in the image-forming apparatus.