Charging Roller Gap Securing Member Segmentation
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Solution Overview
Problem
The existing charging roller designs face a limitation in the number of replacements for the gap retaining member, which reduces the effective charge emission surface area, leading to a shorter lifespan and reduced recycling capabilities.
Innovation Solution
A charging roller configuration with a conductive shaft, a charge emission member, and a gap securing member that protrudes closer to the photoreceptor drum than the charge emission member, bonded using electrically releasing adhesive, allowing for easy replacement of the gap securing member without reducing the effective charge emission surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gap retaining member is replaced with a larger area to prevent partial deterioration, then the reliability of the charge emission member is improved, but the effective range of the charge emission surface is reduced
Solution Approach 1:
The gap retaining member is divided into multiple smaller members (first and second gap retaining members) that are positioned at different locations. This segmentation allows each member to have a smaller attachment area, preventing partial deterioration while maintaining the overall gap retention function without reducing the effective charge emission surface width.
Solution Approach 2:
The gap retaining members act as intermediary elements between the charge emission member and the photoreceptor drum, maintaining the necessary gap without requiring large attachment areas. These intermediaries secure the gap while allowing the charge emission surface to maintain its full effective width.
2Stability of the object's composition
If the gap retaining member is made larger to prevent deterioration, then the stability of the gap is improved, but the number of replacements is limited
Solution Approach 1:
By segmenting the gap retaining structure into multiple smaller members, each member can be independently replaced when worn. This segmentation enables multiple replacements over time, extending the overall lifespan of the charging roller while maintaining stable gap control through the distributed arrangement of multiple members.
3Reliability
If the gap retaining member covers a larger area, then the gap securing function is improved, but the charge emission surface area is reduced
Solution Approach 1:
The gap securing function is achieved through multiple segmented gap retaining members positioned at different locations rather than one large continuous member. This segmentation allows the gap securing function to be distributed across multiple smaller areas, preventing deterioration while preserving the charge emission surface area.
Solution Approach 2:
Instead of increasing the radial coverage area of the gap retaining member, the solution positions multiple members at different angular locations around the charging roller. This dimensional change from radial expansion to angular distribution maintains gap securing effectiveness while preserving charge emission surface area.
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 configuration enables multiple replacements of the gap securing member, extending the charging roller's lifespan and enhancing its recyclability without diminishing the charge emission surface area.
Implementation Method 1
a conductive part of the gap securing member and the shaft being bonded to each other by electrically releasing adhesive
Data Source
AI summary
A charging roller has a conductive shaft, a charge emission member provided to the shaft, and a gap securing member provided to the shaft. The gap securing member (i) protrudes toward the photoreceptor drum so as to be closer to the photoreceptor drum than the charge emission member is to the photoreceptor drum and (ii) is in contact with the photoreceptor drum so as to secure a gap between the charge emission member and the photoreceptor drum. A conductive part of the gap securing member and the shaft are bonded to each other by electrically releasing adhesive, so that the gap securing member is provided to the shaft.