Fixing Device Torsion Spring Sensor Contact
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Solution Overview
Problem
Existing fixing devices with detectors held by leaf springs suffer from decreased measurement performance due to inconsistent contact with the heating member, leading to potential image quality deterioration.
Innovation Solution
A fixing device employing a torsion spring to bias a holding member, ensuring consistent contact of a temperature sensor with the heating member's surface, thereby maintaining measurement accuracy and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a detector is held by a leaf spring and brought into contact with the heating member by elastic force, then the detector can measure the temperature of the heating member, but the measurement performance decreases due to inconsistent contact
Solution Approach 1:
The patent employs a biasing member that provides a constant biasing force to maintain dynamic contact between the detector and the heating member. This dynamic mechanism ensures the detector remains consistently pressed against the heating member surface during operation, resolving the contact inconsistency issue while maintaining measurement precision.
Solution Approach 2:
The patent changes the force application parameter from elastic force of a leaf spring to a controlled biasing force. This parameter change ensures more stable and consistent contact pressure between the detector and heating member, improving both measurement precision and contact reliability.
2Reliability
If a biasing member is used to bias the holding member, then contact consistency improves, but device complexity increases
Solution Approach 1:
The biasing member is designed to automatically maintain the detector's contact with the heating member through its inherent biasing force. This self-service mechanism eliminates the need for additional control systems or complex adjustment mechanisms, achieving improved contact consistency without significantly increasing device 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
Prevents decreases in measurement performance and improves image quality by ensuring reliable contact between the temperature sensor and the heating member, while simplifying assembly and reducing component fall-off risks.
Implementation Method 1
a biasing member that biases the holding member so as to bring the detector into contact with a surface of the heating member
Data Source
AI summary
A fixing device includes a heating member, a detector, a holding member, and a biasing member. The heating member is configured to transport a recording medium while nipping the recording medium with a pressure member, so as to fix a toner image onto the recording medium. The detector is configured to measure a temperature of the heating member. The holding member holds the detector. The biasing member biases the holding member so as to bring the detector into contact with a surface of the heating member.