Regulation Blade Cooling via Inner Duct Segmentation
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Solution Overview
Problem
The existing cooling methods for image forming apparatuses using electrophotography struggle to effectively cool the regulation blade without increasing the blower's blowing capacity, leading to potential toner scattering, noise, and increased costs, while also failing to prevent temperature-induced toner sticking and image defects.
Innovation Solution
A cooling structure is implemented within the developing device, where the regulation blade is supported by a blade bracket and cooled through an inner duct with an air supply port, utilizing air flow to effectively cool the blade bracket and regulation blade without increasing the blower's capacity, using metal materials for enhanced thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the blower's blowing capacity is increased to cool the regulation blade, then the cooling effect is improved, but toner scattering, noise, and cost increase occur
Solution Approach 1:
The cooling function is segmented from the main blower system by introducing a dedicated inner duct that supplies cooled air specifically to the regulation blade and blade bracket, allowing localized cooling without requiring increased overall blower capacity
Solution Approach 2:
The inner duct acts as an intermediary component that delivers cooled air from the blower to the regulation blade area, enabling effective cooling through a dedicated air flow path without increasing the main blower's capacity
2Temperature
If the blower's blowing capacity is increased to cool the regulation blade, then the cooling effect is improved, but device size and cost increase
Solution Approach 1:
The cooling system is segmented into a dedicated inner duct structure that integrates within the existing device housing, allowing localized cooling functionality without requiring a larger overall device size
Solution Approach 2:
The inner duct is nested within the existing device structure, utilizing available space inside the housing to route cooled air to the regulation blade without adding external dimensions or increasing device size
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 solution effectively cools the regulation blade, preventing toner sticking and image defects, while avoiding issues like toner scattering, noise, and cost increases, allowing for a high-speed image forming apparatus of smaller size without boosting the blower's capacity.
Implementation Method 1
an inner duct extending in a longitudinal direction of the developing roller to form an air flow path for cooling the blade bracket
Implementation Method 2
using metal materials for enhanced thermal conductivity
Data Source
AI summary
An example developing device includes a developing roller, a regulation blade to regulate a thickness of a toner layer attached to an outer circumference of the developing roller, a blade bracket for supporting the regulation blade, and an inner duct including an air supply port and extending in a longitudinal direction of the developing roller to form a flow path of air to cool the blade bracket.