Process Cartridge Single Drive Mechanism
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Solution Overview
Problem
Existing process cartridges for electronic image-forming apparatuses employ a dual-drive structure, which is complex and costly.
Innovation Solution
A process cartridge design that incorporates a single driving mechanism, where the developing unit can move relative to the drum unit between contact and separation positions, utilizing couplings to transmit rotational driving force and a pushing part to facilitate movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a dual-drive structure is adopted with driving heads on both the photosensitive frame and developing frame, then both the photosensitive drum and developing member can be driven independently, but the structure becomes complex and cost increases
Solution Approach 1:
The patent merges the dual-drive structure into a single-drive structure by providing one driving head that engages with a coupling mechanism. The coupling transmits rotational force to both the photosensitive drum and developing member, eliminating the need for separate driving heads while maintaining independent driving capability through the connecting portion that allows relative movement between the frames
Solution Approach 2:
The single driving head serves multiple functions by driving both the photosensitive drum and developing member through the coupling mechanism. The coupling acts as a universal interface that distributes rotational force to multiple components, making the driving system more versatile and less complex
2Ease of operation
If a dual-drive structure is adopted with driving heads on both the photosensitive frame and developing frame, then both components can be driven independently, but manufacturing cost increases
Solution Approach 1:
The patent combines two separate driving systems into one unified driving mechanism. By using a single driving head that interfaces with a coupling system, the manufacturing cost is reduced due to fewer components, less assembly complexity, and simplified production processes while maintaining the functional capability of independent driving
3Device complexity
If the developing unit is fixed relative to the drum unit, then the structure is simplified, but the developing roller cannot separate from the photosensitive drum
Solution Approach 1:
The patent introduces dynamic capability to the developing unit by enabling it to move relative to the drum unit through the connecting portion. This allows the developing roller to contact the photosensitive drum during operation and separate when needed, providing adaptability while maintaining relatively simple overall structure through the modular connecting design
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
Simplifies the structure and reduces costs by eliminating the need for dual driving heads, while ensuring smooth contact and separation of the developing roller and photosensitive drum.
Implementation Method 1
a first coupling, configured to receive a rotational driving force and transmit the rotational driving force to the photosensitive drum
Implementation Method 2
a second coupling, configured to receive the rotational driving force and transmit the rotational driving force to the developing roller
Implementation Method 3
a connecting portion, configured to movably connect the developing unit with the drum unit, where the connecting portion is disposed at one end of the process cartridge
Data Source
AI summary
The present disclosure provides a process cartridge. The process cartridge includes a drum unit, including a photosensitive drum and a photosensitive frame; a developing unit, including a developing roller and a developing frame; a first coupling, configured to receive a rotational driving force and transmit the rotational driving force to the photosensitive drum; a second coupling, configured to receive the rotational driving force and transmit the rotational driving force to the developing roller; a driving-side end cover, disposed at one end of the developing unit, where the driving-side end cover includes a hole through which a portion of the first coupling is exposed to outside of the driving-side end cover; and a connecting portion, configured to movably connect the developing unit with the drum unit, where the connecting portion is disposed at one end of the process cartridge.