Image Heating Unit Substrate Mounting Gap
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Solution Overview
Problem
Existing image heating units in image forming apparatuses face challenges with the vulnerability of memory components to heat and physical impact, leading to increased costs due to the need for protective measures.
Innovation Solution
An image heating unit design featuring a pair of rotatable members forming a nip for toner image heating, with an electrical substrate, including a storing element, mounted on the outer surface of the unit, maintaining a predetermined gap to enhance durability and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the memory is disposed on the bottom of the casing of the fixing unit to protect it from heat, then the memory is protected from thermal damage, but the memory becomes vulnerable to physical impact and shock
Solution Approach 1:
The patent introduces a protecting member as an intermediary component between the memory and the external environment. This protecting member specifically shields the memory from physical impact and shock while allowing the memory to remain positioned on the outer surface of the fixing unit for heat dissipation and accessibility.
2Reliability
If a protecting member is added to cover the memory on the outer surface of the fixing unit, then the memory is protected from physical impact, but the cost of the image forming apparatus increases
Solution Approach 1:
The protecting member is integrated with the existing outer casing structure of the fixing unit. By merging the protection function into the existing structural components rather than adding separate protective elements, the patent achieves physical impact resistance without significantly increasing device complexity or cost.
3Ease of operation
If the memory is mounted on the outer surface of the fixing unit for accessibility, then the memory is easily accessible for replacement, but the memory is exposed to both heat and physical impact
Solution Approach 1:
The patent applies differential protection strategies to different aspects of memory mounting. The memory remains accessible on the outer surface for ease of operation, while localized protecting members are applied only to the specific areas vulnerable to physical impact. This selective application of protection maintains accessibility while mitigating environmental hazards.
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 design effectively protects the memory components from heat and physical impact while maintaining operational efficiency, reducing the overall cost of the image forming apparatus by minimizing the need for additional protective measures.
Implementation Method 1
a pair of rotatable members (201, 251) configured to form a nip (N) for heating a toner image
Data Source
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AI summary
An image heating unit detachably mountable to an image forming apparatus includes a pair of rotatable members configured to form a nip for heating a toner image formed on a recording material; an outermost wall positioned outside the rotatable members; and an electrical substrate including a storing element. The electrical substrate is mounted on an outer surface of the outermost wall so that the storing element faces the outer surface of the outermost wall with a predetermined gap therebetween.