Developing Device Side Seal Member Segmentation
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Solution Overview
Problem
Conventional developing devices face challenges in achieving an effective seal due to difficulties in attaching a long felt member across elastic members with height discrepancies, leading to potential developer leakage.
Innovation Solution
The developing device employs separately configured first and second seal members that contact the developing roller, eliminating the need for a long integral felt member and allowing for precise attachment without steps, ensuring a tight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a long integral felt member is used to seal across both elastic members, then the seal coverage is improved, but the attachment difficulty increases due to height discrepancies between elastic members
Solution Approach 1:
The side seal member is divided into a first elastic member attached to the case main body and a second elastic member attached to the adjustment member, replacing the single long integral felt member. This segmentation allows each elastic member to be attached independently to its respective mounting surface, eliminating the attachment difficulties caused by height discrepancies while maintaining seal coverage across both surfaces.
2Volume of moving object
If the case main body and adjustment member are positioned closely to maintain compact structure, then the device size is reduced, but developer leakage risk increases due to potential height mismatches
Solution Approach 1:
Each elastic member is designed with specific local properties suited to its mounting location. The first elastic member is optimized for attachment to the case main body surface, while the second elastic member is optimized for the adjustment member surface. This local quality approach allows each component to be tailored to its specific mounting conditions, ensuring reliable sealing even when the overall device maintains a compact structure with closely positioned components.
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 a highly effective seal, preventing developer leakage and maintaining consistent developer thickness, thus ensuring reliable operation of the device.
Implementation Method 1
The side seal member has a first elastic member and a second elastic member, the first elastic member being attached to the facing area of the case main body, and the second elastic member being attached to the facing area of the adjustment member
Data Source
AI summary
A developing device is provided with a case main body, a developing roller capable of rotating and supporting developer housed in the case main body, an adjustment member extending along a rotation axis direction of the developing roller, and a side seal member. The side seal member comprises a first seal member mounted on the case main body, and a second seal member mounted on the adjustment member. The first seal member and the second seal member are configured separately and make contact with one another.