Developing Device Reproduction via Screw Reinsertion
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Solution Overview
Problem
The existing methods for reusing disassembled parts of developing devices, such as the bearing member and developing frame, are inefficient due to the need for cutting, melting, and re-molding, which is time-consuming and costly, leading to inaccurate repositioning and reduced image development quality.
Innovation Solution
A method that involves reinserting screws into the conductive resin molded portion to accurately rejoin the disassembled developing frame and bearing member, ensuring precise positioning and reattachment without the need for new parts or re-molding, thereby stabilizing the image formation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If conventional methods (cutting, melting, re-molding) are used to reuse disassembled parts, then parts can be reused, but it is time-consuming and costly
Solution Approach 1:
Positioning holes are pre-formed in the bearing member during the original manufacturing process, so that when parts are disassembled and need to be reused, the bearing member can be directly repositioned and reattached without requiring cutting, melting, or re-molding operations. This preliminary preparation eliminates the time-consuming post-disassembly processing.
2Ease of repair
If conventional methods (cutting, melting, re-molding) are used to reuse disassembled parts, then parts can be reused, but it leads to inaccurate repositioning
Solution Approach 1:
Positioning holes are pre-formed in the bearing member at the correct positions during original manufacturing, ensuring that when the bearing member is reattached to the developing frame, it automatically returns to its precise original position without requiring complex measurement or adjustment procedures.
Solution Approach 2:
The patent replaces complex mechanical positioning systems (such as precision machined surfaces, alignment features, or adjustment mechanisms) with a simpler hole-based positioning system. The bearing member is positioned by inserting pins or shafts through the pre-formed positioning holes, which provides accurate positioning with simpler mechanics.
3Manufacturing precision
If new parts are manufactured instead of reusing disassembled parts, then positioning accuracy is maintained, but time and cost losses occur
Solution Approach 1:
Positioning holes are pre-formed in the bearing member during original manufacturing, enabling accurate repositioning of reused parts. This eliminates the need to manufacture entirely new parts while maintaining positioning accuracy, thereby saving the time and resources required for new part production.
Solution Approach 2:
Instead of discarding the bearing member after disassembly, the patent enables its recovery and reuse. The pre-formed positioning holes ensure that the recovered bearing member can be reattached with the same positioning accuracy as when new, making the recovery and reuse process as effective as manufacturing new parts but without the associated time and cost penalties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for the reproduction of developing devices without incurring time and cost losses, ensuring accurate positioning of the bearing member with respect to the developing frame, thus maintaining image quality and simplifying the maintenance and reuse of parts.
Implementation Method 1
the resin molded portion formed by solidifying the conductive resin is electrically connected to the developing blade 24. Therefore, electric power can be fed to the developing blade 24 by feeding electric power to the power feeding position in the resin molded portion
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
The engagement between a fixing member and a resin member is released and the resin member is separated from a frame thereby separating a bearing member from the frame. Parts to be used in a developing device are replaced or the developing device is replenished with a developer. The resin member is connected to the frame to connect the bearing member to the frame. The fixing member is inserted into a through hole to engage with the resin member and fix the resin member to the frame, thereby fixing the bearing member to the frame.