Developing Agent Cartridge with Integrated Agitation and Shutter
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Solution Overview
Problem
Tandem-type color laser printers face challenges in miniaturization due to the need for large developing devices and toner boxes, leading to increased size, labor-intensive maintenance, and high running costs, as well as difficulties in providing mechanisms for agitating toner and opening/closing shutter members in limited spaces.
Innovation Solution
The design includes a casing with parallel image carriers and developing agent carriers, where developing agent cartridges are arranged to be detachable and equipped with agitating members driven by a transmission unit, and shutter members that can be collectively opened/closed, allowing for efficient toner management and reduced maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If developing devices are increased in size to ensure sufficient volumes of toners, then the photosensitive cartridge and printer body must also be increased in size, but this increases the overall size of the image forming apparatus
Solution Approach 1:
The developing device is divided into two separate components: a reusable developing unit and a consumable developing agent cartridge. The developing unit contains the photosensitive cartridge with reduced size, while the developing agent cartridge holds the toner supply. This segmentation allows the toner volume to be increased without proportionally increasing the size of the photosensitive cartridge and printer body.
Solution Approach 2:
The developing agent cartridge is designed to be detachably mounted on the developing unit, with the developing agent cartridge containing the toner supply. The developing unit itself is housed within the printer body. This nested arrangement allows efficient space utilization, where the toner storage volume can be optimized independently of the photosensitive cartridge dimensions.
2Quantity of substance
If developing devices are increased in size to ensure sufficient volumes of toners, then the photosensitive cartridge must also be increased in size, but this increases maintenance labor
Solution Approach 1:
By separating the developing unit from the developing agent cartridge, the invention enables independent replacement of the consumable developing agent cartridge without requiring removal of the photosensitive cartridge. This segmentation reduces maintenance labor by allowing users to replace only the toner cartridge rather than the entire photosensitive cartridge assembly.
Solution Approach 2:
The developing agent cartridge is designed as a disposable or easily replaceable consumable component. When toner is depleted, the entire developing agent cartridge can be replaced without affecting the reusable developing unit or photosensitive cartridge, significantly reducing maintenance complexity and labor.
3Quantity of substance
If developing devices are increased in size to ensure sufficient volumes of toners, then the printer body must also be increased in size, but this reduces adaptability
Solution Approach 1:
The separation of the developing agent cartridge from the photosensitive cartridge allows the printer body to accommodate a standardized, compact photosensitive cartridge unit. The developing agent cartridge can be optimized for toner volume independently, enabling the same printer body to work with different developing agent cartridges of varying capacities, thus improving adaptability.
4Ease of operation
If mechanisms for agitating toner and opening/closing shutter members are provided in limited spaces, then device complexity increases
Solution Approach 1:
The agitating mechanism and shutter mechanism are integrated into the developing agent cartridge as unified components. The shutter member is positioned to simultaneously control toner flow and engage with the agitating mechanism, reducing the number of separate parts and simplifying the overall device complexity while maintaining functionality in limited space.
Solution Approach 2:
The developing agent cartridge is designed so that when it is installed in the developing unit, the shutter member automatically positions itself to control toner flow, and the agitating mechanism is automatically engaged with the toner supply. This self-service design reduces the need for additional control mechanisms and simplifies the overall system.
Data Source
AI summary
An image forming apparatus may include a casing, and a plurality of image carriers arranged in parallel along one direction in the casing and formed with an electrostatic latent image. The apparatus can further include a plurality of developing agent carriers opposed to the image carriers, for visualizing the electrostatic latent image by feeding a developing agent to the image carriers, and a plurality of developing agent cartridges, arranged in parallel in the one direction to be opposed to the developing agent carriers in the longitudinal direction of the developing agent carriers, and configured to be together attachable/detachable to/from the casing along the one direction, for accommodating the developing agent fed to the developing agent carriers.