Developer Container Gear Layout for Compact Design
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Solution Overview
Problem
The existing developer containers for image forming apparatuses face challenges in downsizing due to the need to prevent guide units from interfering with gears, which are required for transmitting driving force to conveyance screws and agitators, leading to increased device size.
Innovation Solution
A developer container design where a sequence of gears is positioned on the exterior, with a first gear that can move between an operating and retracted position, allowing the guide portion to be placed within the gear's projection area without interfering with the main body's guiding portion during attachment or detachment, enhancing layout flexibility and enabling downsizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If gears are provided on the exterior of the developer container to transmit driving force, then torque transmission is enabled, but the guide unit interferes with the gears requiring larger device size
Solution Approach 1:
The first gear is designed to be movable between an operating position (where it engages with the second gear for torque transmission) and a retracted position (where it clears the guide unit path). This dynamic repositioning allows the same component to serve two conflicting functions at different times, resolving the contradiction between needing gear engagement for power transmission and needing clear space for the guide unit during attachment/detachment operations
2Ease of operation
If the guide unit is placed on the developer container for guiding during attachment, then positioning is enabled, but it interferes with the gears requiring separation
Solution Approach 1:
The guide unit's path is made dynamically clearable by the movable first gear that retracts from the engagement area during attachment/detachment operations. This allows the guide unit to be positioned in the optimal location for guiding without creating permanent layout restrictions, as the gear moves out of the way when needed
3Adaptability or versatility
If the first gear is moved between operating and retracted positions, then layout flexibility is improved, but mechanism complexity increases
Solution Approach 1:
The gear system is segmented into a movable first gear and a fixed second gear, allowing the first gear to be independently positioned. This segmentation enables the first gear to retract from the engagement area during attachment/detachment operations while remaining engaged with the second gear during operation, providing layout flexibility without requiring complex overall mechanism redesign
Solution Approach 2:
The first gear transitions from a static component to a dynamic one that can change position based on operational requirements. This dynamic capability allows the gear to clear the guide unit path during attachment/detachment while maintaining engagement for torque transmission during operation, achieving layout flexibility through controlled movement
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The developer container (50) includes a rotator (53) that is rotated in the container body, a sequence of gears (62, 63, 64) disposed outside the developer container that transmits a torque to the rotator, and a container guiding portion (73a) that fits with a main body side guiding portion and guides the developer container in a direction in which the developer container is attached to a mounting portion of an image forming device main body. A first gear included in the sequence of the gears is movable between an operating position where the first gear engages with a second gear and a retracted position where the first gear is retracted. On a surface on which the container guiding portion is disposed, a part of the container guiding portion is disposed within a projected area of the first gear being disposed at the operating position.