Swingable Developing Sleeve Magnetic Pole Positioning
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Solution Overview
Problem
Existing developing apparatuses face challenges in adjusting magnetic poles for swingable developing sleeves while maintaining constant gaps, which hinders the ability to swing the sleeves and affect image quality and processing speed.
Innovation Solution
A developing apparatus design featuring a swingable connecting member that allows the second developing sleeve to adjust its magnetic poles relative to the first sleeve, maintaining constant gaps and enabling the second sleeve to swing, with positioning members for precise magnetic pole adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the magnetic poles are adjusted by fitting a fitting member to a D-shaped end portion of the magnetic body, then the magnetic poles can be placed at predetermined positions, but the swingable developing sleeve becomes fixed to the developer container and loses its ability to swing
Solution Approach 1:
The invention divides the magnetic body into two separate components: a D-shaped magnetic body and a separate fitting member with positioning protrusions. This segmentation allows the magnetic body to be freely swingable while the fitting member provides precise positioning without restricting movement. The positioning protrusions engage with corresponding recesses to locate the magnetic poles at predetermined positions while maintaining the swingable connection between the developing sleeve and developer container.
Solution Approach 2:
The invention introduces a positioning member as an intermediary element between the magnetic body and the developer container. This positioning member includes positioning protrusions that engage with both the magnetic body and the container, serving as a mediator that provides precise positioning without creating a fixed connection. The intermediary positioning member allows the magnetic body to swing freely while maintaining accurate pole positioning.
2Manufacturing precision
If the second developing sleeve is made swingable about the first sleeve, then the gap between sleeves can be maintained constant and image quality improved, but the magnetic pole adjustment becomes difficult or impossible
Solution Approach 1:
The invention segments the magnetic body from the fitting member, allowing the magnetic body to be independently positioned and adjusted. The D-shaped magnetic body can be rotated to adjust magnetic pole positions while the separate fitting member maintains the swingable connection. This segmentation enables both gap stability (through the swingable connection) and ease of magnetic pole adjustment (through independent rotation of the magnetic body).
Solution Approach 2:
The invention creates a dynamic system where the magnetic body can rotate independently within the swingable developing sleeve assembly. The magnetic body is not rigidly fixed but can be dynamically adjusted to different angular positions while the overall swingable connection maintains constant gaps. This dynamic adjustment capability allows easy magnetic pole positioning without compromising gap stability.
3Manufacturing precision
If a fitting member is fixed to the developer container to adjust magnetic pole positions, then positioning accuracy is achieved, but the developing sleeve cannot swing and processing speed decreases
Solution Approach 1:
The invention segments the positioning function from the fixing function. The positioning protrusions provide accurate magnetic pole positioning, while the swingable connection between the developing sleeve and developer container maintains processing speed. The magnetic body can be precisely positioned through the fitting member with positioning protrusions, yet the overall assembly remains swingable to enable high-speed processing.
Solution Approach 2:
The positioning member acts as an intermediary that provides precise positioning without creating a rigid fixed connection. The positioning protrusions engage to locate the magnetic poles accurately, but the swingable nature of the connection allows rapid movement and processing. This intermediary positioning mechanism achieves both positioning accuracy and high processing speed.
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 design ensures accurate and adjustable magnetic pole positioning, maintaining constant gaps and allowing the second developing sleeve to swing, thereby enhancing image quality and processing speed while preventing toner melting and image failure.
Implementation Method 1
A magnetic body (magnetic roller) having magnetic poles is disposed in each of the developing sleeves
Data Source
AI summary
A developing apparatus includes first and second developer bearing members configured to bear developer and a connecting member configured to connect the first and second developer bearing members to each other such that the second developer bearing member is swingable relative to the first developer bearing member. A first adjusting member which adjusts the positions of magnetic poles of a first magnetic member disposed in the first developer bearing member is fixed to the developing apparatus. A second adjusting member which adjusts the positions of magnetic poles of a second magnetic member disposed in the second developer bearing member is fixed to the connecting member.