Developer Carrying Member Groove Structure for Adhesive Containment
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Solution Overview
Problem
The challenge in developing roller design is the spread of adhesive onto the outer circumferential surface during assembly, leading to potential image defects and increased manufacturing costs due to the need for adhesive removal processes, while insufficient adhesion strength without adhesive can result in poor fixing between the sleeve and flange.
Innovation Solution
A developer carrying member design featuring a cylindrical sleeve, magnet, and flange with a specific adhesive application and press-fitting process, utilizing a groove structure to contain the adhesive within the flange and sleeve interface, preventing its spread and ensuring strong adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is applied to bond the sleeve and flange, then adhesion strength is improved, but adhesive may spread onto the outer circumferential surface causing image defects
Solution Approach 1:
The groove portion creates a localized adhesive application zone with specific geometric constraints (depth, width, and position) that confines adhesive to the bonding interface between the flange and sleeve. This local quality control prevents adhesive from spreading to the outer circumferential surface while maintaining sufficient adhesion strength at the joint.
2Strength
If adhesive is applied to bond the sleeve and flange, then adhesion strength is improved, but manufacturing complexity increases due to adhesive removal processes
Solution Approach 1:
The groove portion design extracts the adhesive containment function from the overall assembly process. By incorporating the groove structure into the flange or sleeve before assembly, the adhesive is automatically confined during bonding without requiring subsequent removal or cleanup operations, thereby simplifying the manufacturing process.
3Ease of manufacture
If no adhesive is used, then manufacturing simplicity is improved, but adhesion strength between sleeve and flage deteriorates
Solution Approach 1:
The groove portion is pre-formed in the flange or sleeve component before the assembly operation. This preliminary action prepares the adhesive containment structure in advance, allowing simple adhesive application without complex real-time control during assembly, thus maintaining manufacturing simplicity while ensuring adhesion strength.
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
The groove structure effectively contains adhesive, preventing surface contamination and ensuring robust adhesion, thereby reducing image defects and manufacturing costs while maintaining secure bonding between the sleeve and flange.
Implementation Method 1
adhesive bonds together the sleeve and the flange
Implementation Method 2
groove structure to contain the adhesive within the flange and sleeve interface, preventing its spread
Data Source
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AI summary
A developer carrying member (10) includes a shaft (1), a magnet (2), a sleeve (3), a flange (4), and adhesive (5). The flange (4) has a first fitting portion (41), a second fitting portion (42), and a groove portion (43). The adhesive (5) is disposed in the groove portion (43). A first groove portion (431) and a second groove portion (432) are formed continuously in this order from the first fitting portion (41) side to the second fitting portion (42) side. The height from the bottom surface of the second groove portion (432) to the outer circumferential surface of the first fitting portion (41) is greater than that from the bottom surface of the first groove portion (431) to the outer circumferential surface of the first fitting portion (41).