Developer Storage Body With Circumferential Seal-Restraining Holes
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Solution Overview
Problem
Conventional developer storage bodies have a risk of developer leakage through the rotating member due to insufficient sealing between the frame body and the rotating member.
Innovation Solution
A developer storage body design featuring a frame body with a contact surface containing holes arranged circumferentially, which restricts the movement of a seal member, maintaining consistent sealing pressure between the seal member and the rotating member, thereby preventing developer leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal member is placed between the frame body and rotating member without holes in the contact surface, then the sealing structure is simple, but the seal member moves during rotation causing inconsistent sealing pressure and developer leakage
Solution Approach 1:
The contact surface of the frame body is designed with multiple holes arranged in the circumferential direction, creating a porous structure that interacts with the seal member. The holes restrict the seal member's movement in the radial direction while allowing it to maintain consistent contact pressure against the rotating member, preventing developer leakage without complicating the overall sealing structure
Solution Approach 2:
The holes are specifically arranged in the first contact region where the seal member contacts the frame body, creating a localized functional zone. This local modification of the contact surface provides the necessary restriction on seal member movement only where needed, while maintaining simplicity in other areas of the sealing structure
Data Source
Figure 1
Figure 2(A)~2(B)
Figure 3
AI summary
A developer storage body includes a frame body that stores a developer, and a rotating member a part of which is inserted into a hole portion provided in the frame body. The rotating member agitates or conveys the developer in the frame body. A seal member is held between the frame body and the rotating member in a direction of a rotation axis of the rotating member. The frame body has a contact surface in contact with the seal member. The contact surface has a first contact region in which a plurality of holes are formed and arranged in a circumferential direction, and first contact portions are each formed between two of the plurality of holes adjacent to each other.