Developer Cartridge Spiral Conveying and Bag Design
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Solution Overview
Problem
Developer cartridges face issues with non-uniform load distribution on the paddle shaft, leading to potential damage and increased driving load, as well as developer stress accumulation, which can deteriorate the toner properties and complicate the manufacturing process due to exposure during filling.
Innovation Solution
A developer cartridge design featuring a spiral conveying member and a flexible developer bag with a support wall, which maintains shape and reduces stress, along with a stopper to prevent thrust force-induced developer bag movement, ensuring uniform developer discharge and reduced contact with the spiral coil, thereby alleviating stress and maintaining toner quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a paddle is used to carry developer to the outlet, then developer supply is enabled, but non-uniform load distribution causes paddle shaft damage
Solution Approach 1:
The invention extracts the problematic paddle mechanism and replaces it with a developer bag system that discharges developer through gravity and internal pressure, eliminating the paddle shaft and its associated load distribution problems while maintaining developer supply function
Solution Approach 2:
Instead of using an active paddle to push developer outward, the invention inverts the approach by using a passive bag system where developer flows inward toward the outlet through pressure differential, reversing the force direction and eliminating mechanical wear
2Productivity
If the paddle rotates to convey developer, then developer discharge is enabled, but large driving load increases energy consumption
Solution Approach 1:
The invention replaces the mechanical paddle rotation system with a pressure-driven bag discharge system, substituting mechanical work with pressure differential forces that move developer with minimal energy input
Solution Approach 2:
The developer bag system utilizes periodic pressure changes and gravity-assisted flow to achieve continuous developer discharge without sustained mechanical rotation, reducing average energy consumption
3Ease of operation
If the paddle continuously stirs the developer, then developer circulation is enabled, but stress accumulation deteriorates toner properties
Solution Approach 1:
The invention removes the continuous stirring action of the paddle and replaces it with a gentle pressure-driven flow system that moves developer from the bag through the outlet without intense mixing, maintaining toner integrity while enabling circulation
Solution Approach 2:
The flexible developer bag acts as a cushioning element that absorbs and distributes pressure gradually, preventing sudden stress spikes that would damage toner particles during the discharge and circulation process
4Ease of manufacture
If developer is filled into the container during manufacturing, then developer cartridge assembly is enabled, but developer exposure complicates manufacturing
Solution Approach 1:
The invention segments the manufacturing process by pre-filling developer into sealed bags in a controlled environment, then assembling the bags into cartridges separately, allowing different manufacturing zones with appropriate containment levels and reducing overall exposure risk
Solution Approach 2:
The sealed developer bag serves as an intermediary container that isolates developer from the manufacturing environment during filling, then interfaces with the cartridge housing, acting as a protective barrier that simplifies manufacturing cleanliness requirements
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 solution stabilizes developer discharge, reduces the risk of paddle shaft damage, maintains toner properties, and improves manufacturing efficiency by allowing independent developer bag filling and reduced exposure, enhancing the overall performance and cleanliness of the process.
Implementation Method 1
a support wall filled with gas to maintain a shape of the developer bag
Implementation Method 2
a spiral member rotatably installed in the housing; the developer bag may be inserted into a central portion of the spiral coil
Data Source
AI summary
A developer cartridge includes: a housing including a developer outlet; a conveying member configured to convey a developer to the developer outlet and including a spiral member rotatably installed in the housing; and a developer bag configured to accommodate the developer, be installed in the housing, and rotate in connection with the conveying member, the developer bag including an opening for discharging the developer into the housing.