Rough Surface Film for Fixing Roller Temperature Detection
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Solution Overview
Problem
Conventional noncontact temperature sensors for fixing rollers in image forming devices face challenges in improving response and stability performance due to variations in distance tolerance and environmental influences, which are exacerbated by the need to balance thermal absorptivity and transmissivity.
Innovation Solution
A temperature detecting device with a rough surface film configuration that enhances heat absorption without increasing film thickness, allowing for improved stability performance without compromising response performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the resin film is increased to improve thermal absorptivity and stability performance, then the thermal capacity of the resin film increases, which deteriorates the response performance of the temperature sensor
Solution Approach 1:
The invention applies local quality by creating a rough surface configuration only on the side of the resin film that faces the fixing roller, while keeping the other surface smooth. This localized surface modification increases thermal absorptivity and stability performance without requiring increased film thickness, thereby avoiding deterioration of response performance. The rough surface area is specifically optimized to enhance heat absorption characteristics.
2Reliability
If the thermal absorptivity of the resin film is increased to improve stability performance, then the thermal transmissivity decreases, which may affect the heat transfer efficiency
Solution Approach 1:
The invention applies local quality by modifying only the surface configuration of the resin film that contacts the fixing roller, creating a rough surface to enhance thermal absorptivity and stability. The resin film itself maintains appropriate thickness and material properties to ensure sufficient heat transfer efficiency. This localized surface modification allows optimization of stability performance without compromising the overall heat transfer function.
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 device effectively suppresses heat reflection and improves heat absorption, leading to reduced temperature variations and enhanced stability performance while maintaining quick warm-up times.
Implementation Method 1
the one surface of the film is increased in surface area. Thereby, the reflection of heat from the detected object is suppressed on the one surface of the film. Also, it becomes possible to improve the absorptivity of heat from the detected object on the one surface of the film.
Implementation Method 2
the reflection of heat from the detected object is suppressed on the one surface of the film
Data Source
AI summary
A pressure thermistor has a retention part, a film retained on the lower surface of the retention part in such a way that both surfaces of the film are exposed, and a thermosensitive device attached to the film. One surface of the film is rough and faces a pressure roller. The one surface of the film is increased in surface area due to rough surface. Thus, reflection of heat from the pressure roller is suppressed on the one surface of the film. Also, it becomes possible to improve the absorptivity of heat on the one surface of the film.