Image Forming Apparatus Removable Process Unit Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional image forming apparatuses face challenges in accurately locating and securing removable process units, such as development cartridges, during maintenance and operation, which can lead to misalignment and potential print quality issues.
Innovation Solution
The image forming apparatus incorporates a main body frame with a fitting region and a pressing member that presses the process unit in a specific direction, combined with restriction members and a restriction plate to restrict displacement, ensuring accurate alignment and secure fitting of the process unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a removable process unit is used for maintenance and operation, then ease of repair and maintenance is improved, but accurate positioning and securing of the process unit becomes difficult
Solution Approach 1:
The positioning system is segmented into two parts: a restriction plate attached to the removable process unit and restriction members fixed to the main body. This segmentation allows the process unit to be easily removed and reinstalled while ensuring accurate positioning through the complementary interface between these segmented components.
Solution Approach 2:
The restriction plate acts as an intermediary component that mediates between the process unit and the restriction members. It transfers and transmits the pressing force from the pressing member to the process unit, ensuring accurate positioning while allowing easy removal and installation.
2Manufacturing precision
If a pressing member is used to secure the process unit, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The restriction members combine multiple functions into a single component: they restrict displacement in the second direction, work in conjunction with the pressing member to secure the process unit, and guide the process unit during installation. This merging reduces the need for separate components and simplifies the overall structure.
Solution Approach 2:
The restriction members serve multiple purposes: they act as positioning guides, displacement restrictors, and structural support elements. This multi-functionality reduces the total number of components needed in the system, thereby reducing device complexity while maintaining positioning accuracy.
3Manufacturing precision
If restriction members and restriction plate are added to restrict displacement, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The restriction plate and restriction members provide localized positioning control at specific critical interfaces, rather than requiring complex positioning mechanisms throughout the entire system. This localized approach maintains positioning accuracy while minimizing overall structural complexity.
Solution Approach 2:
Instead of using complex active mechanisms to achieve positioning, the invention uses passive geometric constraints through the restriction plate and restriction members. The positioning accuracy is achieved through the inverted approach of using simple geometric shapes and contact surfaces rather than complex actuating mechanisms.
Data Source
AI summary
An image forming apparatus includes: a main body frame; a process unit which is removably fitted in a first direction; a pressing member which presses the process unit in a second direction; and a restriction member which restricts the displacement of the process unit. The process unit includes a restriction plate which protrudes downward from the unit frame. The restriction member includes a pair of sandwiching surfaces which sandwich the restriction plate in the second direction. The process unit is fitted and is pressed by the pressing member such that the restriction plate abuts against the sandwiching surface to restrict the displacement of the process unit.