Developer Carrying Member Groove Structure for Adhesive Containment

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Solution Overview

Problem

The challenge in developing roller manufacturing is the spread of adhesive onto the outer circumferential surface, leading to potential image defects and increased costs due to the need for adhesive removal processes, while ensuring sufficient adhesion strength between the sleeve and flange.

Innovation Solution

A developer carrying member with a flange and sleeve design featuring specific groove portions for adhesive application and press-fitting, where the adhesive is confined within these grooves, preventing spread and ensuring strong adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If adhesive is applied to bond the flange and sleeve, then adhesion strength is improved, but adhesive may spread onto the outer circumferential surface causing image defects

Engineering Contradiction:

Improveadhesion strengthVSAvoidadhesive spread causing image defects

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The groove portion is provided only at the axial end portion of the fitting portion, creating a localized adhesive receiving space. This local modification allows adhesive to be confined where it is needed for bonding while preventing it from spreading to the outer circumferential surface that contacts developer, thus resolving the contradiction between achieving strong adhesion and preventing harmful adhesive spread.

Inventive Principle:

Principle #3Local quality

2Strength

If adhesive is applied generously to ensure strong bonding, then adhesion strength is improved, but adhesive removal processes are needed increasing manufacturing complexity

Engineering Contradiction:

Improveadhesion strengthVSAvoidadhesive removal process

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

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 design effectively contains the adhesive, preventing it from spreading onto the outer surface, maintaining adhesion strength, and reducing the need for additional adhesive removal processes, thus enhancing manufacturing efficiency and reducing costs.

Implementation Method 1

The adhesive bonds together the sleeve and the flange

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentEP4711859A1Developer carrying member and manufacturing method thereof

Publication Date: 2026.03.18 KYOCERA DOCUMENT SOLUTIONS INC

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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 height from the bottom surface of a second groove portion (432) to the outer circumferential surface of a first fitting portion (41) is greater than the height from the bottom surface of a first groove portion (431) to the outer circumferential surface of the first fitting portion (41). The height from the bottom surface of a third groove portion (433) to the outer circumferential surface of the first fitting portion (41) is smaller than the height from the bottom surface of the second groove portion (432) to the outer circumferential surface of the first fitting portion (41), and is equal to or greater than the height from the bottom surface of the first groove portion (431) to the outer circumferential surface of the first fitting portion (41).