Leaf Spring Strain Detection for Cleaning Blade
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Solution Overview
Problem
The existing cleaning apparatuses in image forming devices face challenges in accurately detecting the strain of blades, leading to premature replacement and increased costs due to the strain gauge being disposed across the joint between the blade and support plate, which reduces detection accuracy.
Innovation Solution
A cleaning apparatus is designed with a leaf spring and a strain detection unit positioned between the first and second joint regions, allowing for improved strain detection accuracy by placing the strain gauge closer to the second joint region, where maximum strain is generated, and using a metal leaf spring for elastic deformation to eliminate variations in strain detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the strain gauge is disposed to extend across the joint between the blade and the support plate, then the strain detection coverage is improved, but the strain detection accuracy deteriorates
Solution Approach 1:
The strain gauge is positioned to specifically target the region of maximum strain concentration (near the second joint region) rather than uniformly covering the entire blade. This localized placement optimizes detection accuracy at the critical stress point while maintaining sufficient coverage to monitor blade health effectively.
2Reliability
If the blade is replaced periodically based on running distance, then the reliability of the cleaning apparatus is maintained, but the cost increases and productivity decreases due to premature replacement
Solution Approach 1:
The strain gauge provides real-time feedback on the actual mechanical stress and wear condition of the blade. This feedback enables condition-based replacement decisions, allowing the blade to be used until its true lifetime expires rather than following a fixed schedule, thereby maximizing utilization and reducing unnecessary replacements.
3Device complexity
If the strain gauge is placed across the joint region, then the structural simplicity is maintained, but the detection accuracy deteriorates due to reduced strain values at the joint
Solution Approach 1:
The strain gauge is positioned to specifically target the region of maximum strain concentration (near the second joint region) rather than uniformly covering the entire blade. This localized placement optimizes detection accuracy at the critical stress point while maintaining sufficient coverage to monitor blade health effectively.
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 configuration enhances the accuracy of strain detection, enabling the blade to be used until its lifetime is fully exhausted, reducing replacement frequency and maintaining high productivity while minimizing operational costs.
Implementation Method 1
The strain detection unit is configured to detect strain of the leaf spring due to deformation of the leaf spring
Data Source
AI summary
A cleaning apparatus includes a cleaning unit, a leaf spring, a holding member, and a strain detection unit. The cleaning unit is configured to contact a surface of an image carrier. The leaf spring supports the cleaning unit. The holding member holds the leaf spring. At least one strain detection unit is attached to the leaf spring. The strain detection unit is configured to detect strain of the leaf spring due to deformation of the leaf spring. The leaf spring has a first end and a second end. The leaf spring includes, at the first end, a first joint region to which the cleaning unit s joined and includes, at the second end, a second joint region to which the holding member is joined. The strain detection unit is located between the first joint region and the second joint region.