Developing Cartridge Frame Rigidity via Integral Beam Design
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Solution Overview
Problem
The existing developing cartridges for image forming apparatuses, such as laser printers, have complex production methods due to the requirement of die cutting the lower frame, which complicates manufacturing and may compromise the rigidity of the upper frame's front-end portion.
Innovation Solution
The developing cartridge design incorporates an upper frame with a beam-like portion integrally formed, enhancing the rigidity of the front-end portion and eliminating the need for forward die cutting of the lower frame, while a support between the third wall and the first wall supports the first wall, and a layer thickness regulation member with plate-shaped portions secures to the second walls, reducing the cartridge's size and improving structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the lower frame has a beam-like portion to support the upper frame, then the rigidity of the upper frame's front-end portion is improved, but the production method becomes complicated due to die cutting requirements
Solution Approach 1:
The beam-like portion is integrally formed with the upper frame as a single piece, merging the support function directly into the frame structure. This eliminates the need for separate beam components and complex die cutting operations, while still providing the required rigidity support to the upper frame's front-end portion
Solution Approach 2:
The frame is divided into an upper frame and a lower frame that are separately manufactured and then assembled together. This segmentation allows each frame to be manufactured independently using simpler processes, avoiding the complex die cutting that would be required if the beam-like portion was integrated into a single-piece lower frame
2Strength
If the beam-like portion is integrally formed in the upper frame, then the rigidity of the front-end portion is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The beam-like portion is merged with the upper frame as an integral component, forming a unified structure that enhances rigidity without requiring additional complex manufacturing steps. The upper frame is manufactured as a single piece with the beam-like portion already incorporated
3Stability of the object's composition
If die cutting is performed on the lower frame, then the structural integrity is maintained, but the production time and complexity increase
Solution Approach 1:
The frame structure is segmented into separate upper and lower frames that are manufactured independently and then assembled. This eliminates the need for time-consuming die cutting operations on the lower frame, improving production efficiency while maintaining structural integrity through the assembly of pre-fabricated components
Solution Approach 2:
The upper frame and lower frame are manufactured as complete, ready-to-assemble components before final assembly. This preliminary manufacturing of discrete components avoids the need for complex die cutting operations during the assembly process, thereby improving productivity
Data Source
AI summary
A developing cartridge includes a first frame including a first wall at one end thereof, a second frame including a pair of second walls facing with each other and a third wall that connects the pair of second walls, an opening that is formed by the first wall, the pair of second walls and the third wall, and a support that is interposed between the third wall and the first wall so as to support the first wall by the third wall.