Developer Container Rotary Shaft Loose Fit Design
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Solution Overview
Problem
Developer agglomeration occurs between the rotary shaft and support parts in developer containers, leading to inefficient conveying during the rotation of the toner conveyance member.
Innovation Solution
A developer container design featuring a conveyance member with a rotary shaft and an elastic part, supported by a rotation member, where the rotary shaft is loosely fitted into a recess with multiple surfaces forming a polygonal shape, ensuring that the shaft is always separated from one of the surfaces, preventing agglomeration and stabilizing the conveying force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the rotary shaft is tightly fitted into the support part to stabilize the rotating center, then the positioning precision is improved, but developer agglomeration occurs in the gap between the shaft and support part
Solution Approach 1:
The invention changes the fit parameter from tight fitting to loose fitting, intentionally creating a gap between the rotary shaft and support part. This parameter change prevents developer agglomeration while the gap is controlled to maintain adequate positioning stability during rotation.
2Object-generated harmful factors
If the rotary shaft is loosely fitted into the support part to prevent developer agglomeration, then developer flow is improved, but the rotating center positioning becomes unstable
Solution Approach 1:
The invention optimizes the gap dimension parameter to a specific range that balances two opposing requirements: large enough to prevent developer agglomeration, but small enough to maintain rotating center positioning stability. This precise parameter control resolves the contradiction between loose fitting and positioning stability.
3Reliability
If the conveyance member is positioned precisely to stabilize scattering force, then developer conveyance stability is improved, but the structure becomes more complex requiring precise fitting
Solution Approach 1:
The invention changes the positioning approach from precise mechanical fitting to controlled gap positioning. By optimizing the gap parameter between the rotary shaft and support part, the system achieves reliable developer conveyance without requiring complex precision fitting mechanisms, thereby reducing structural complexity.
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 design effectively prevents developer agglomeration and ensures uniform force distribution during conveying, enhancing the stability and efficiency of developer transfer from the container to the developing unit.
Implementation Method 1
an elastic part which is supported by the rotation member and is configured to be elastically deformed
Data Source
AI summary
A developer container includes: a container body that has an opening at an upper part and is configured to accommodate therein developer; a conveyance member that is provided in the container body, and includes a rotation member having a rotary shaft and an elastic part, which is supported by the rotation member, is configured to be elastically deformed and is configured to rotate to convey the developer from the opening to an outside of the container body; and a driving member that is connected to one end portion of the rotary shaft and is configured to rotate the rotary shaft. The container body includes a first support part to which the other end portion of the rotary shaft is loosely fitted and a second support part that supports the one end portion of the rotary shaft.