Rotary Developing System Toner Cartridge Replacement Mechanism
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Solution Overview
Problem
Existing image forming apparatuses with rotary developing systems face challenges in efficiently and conveniently replacing toner cartridges, as they often require complex operations and large access openings, which can complicate maintenance and user interaction.
Innovation Solution
A rotary developing system with a rotary body that rotates to alternate between developing and replacement postures, allowing toner cartridges to be easily attached and detached via trays that slide orthogonal to the rotational axis, facilitated by a motor-driven mechanism that switches between developing and replacement positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotary developing system with multiple developing rollers is used, then color image formation capability is improved, but toner cartridge replacement complexity increases
Solution Approach 1:
The system divides the toner cartridge replacement operation into independent segments for each developing roller. Each developing roller can be accessed and serviced separately through its own access opening, allowing users to replace toner cartridges without affecting other color channels. This segmentation reduces the overall complexity by breaking down the multi-step replacement process into manageable individual operations.
Solution Approach 2:
The patent introduces a new spatial dimension for cartridge replacement by positioning access openings at different locations around the rotary assembly. Instead of requiring disassembly of the entire rotary system, users can access specific developing rollers from the side or front, creating a new operational dimension that simplifies the replacement process while maintaining the multi-color capability.
2Ease of operation
If access openings are made larger for easier cartridge replacement, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by providing access openings of appropriate sizes at specific locations around the rotary assembly. Each access opening is sized to accommodate the corresponding developing roller cartridge, allowing easy replacement without requiring excessively large openings that would compromise the device structure. The opening sizes are locally optimized for each position rather than uniformly large throughout.
Solution Approach 2:
The system incorporates movable or adjustable access mechanisms that can dynamically open or expand when needed for cartridge replacement, then return to their original state during normal operation. This dynamic behavior allows large access openings only when required, maintaining structural integrity during image formation while providing ease of operation during maintenance.
Data Source
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AI summary
An image forming apparatus includes a developing unit (50, 590) including a developing roller (51) and a storage frame (53, 553) having a storage portion (53a, 553a), a toner cartridge (70), a drive source (M2), a moving member (80) configured to be moved in a movement direction by driving force of the drive source (M2), and a drive transmission mechanism (101) configured to transmit the driving force from the drive source (M2) to the moving member (80). The moving member (80) includes a first force receiving portion (83kL) and a second force receiving portion (83kR). The toner cartridge (70) is detachably attached to the moving member (80). The moving member (80) is movable in the movement direction between a first position and a second position.