Fuse Cover Protrusion Visual Fastening Indicator
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Solution Overview
Problem
There is a risk of incomplete fastening of nuts when attaching a cover to an electronic device, particularly in configurations where a nut is temporarily fixed onto a bolt, leading to potential omission during the assembly process.
Innovation Solution
A cover design featuring a protrusion on its inner surface with a thin portion on the circumference, which does not interfere with the nut when properly fastened but deforms and whitens when the nut is incompletely fastened, visually indicating the omission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a nut is temporarily fixed onto a bolt to improve fastening workability, then fastening workability is improved, but the risk of omission of complete fastening increases
Solution Approach 1:
The cover includes a white portion (visual indicator) that changes appearance based on nut fastening status. When the nut is properly fastened, the white portion remains hidden or unchanged. When the nut is not completely fastened, the white portion becomes visible, providing immediate visual feedback to the operator about the fastening status without requiring additional inspection steps.
Solution Approach 2:
The cover acts as an intermediary mechanism between the nut fastening process and the operator. It translates the mechanical state of nut fastening into a visible signal through the white portion, mediating the connection between the fastening action and the verification of completion.
2Difficulty of detecting and measuring
If a protrusion is added to the inner surface of the cover to detect nut position, then detection capability is improved, but device complexity increases
Solution Approach 1:
The protrusion is a localized structural feature on the inner surface of the cover, concentrating the detection function in a specific location rather than requiring a complex overall redesign. The white portion is also localized to a specific area that becomes visible only under certain conditions, providing targeted visual feedback without adding unnecessary complexity elsewhere in the structure.
Solution Approach 2:
Instead of making the nut or bolt more complex to indicate its position, the invention inverts the approach by using the cover's structure (protrusion and white portion) to indicate the nut's position. The detection mechanism is built into the cover rather than into the fastening components themselves.
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 incomplete fastening of nuts by providing a clear visual indication of deformation when the nut is not securely attached, ensuring proper assembly of the fixture component.
Implementation Method 1
the thin portion formed on the circumference of the protrusion is subjected to stretch deformation and whitened
Data Source
AI summary
A cover covers a fuse unit to which a terminal is fixed in a manner such that a nut is fastened onto a bolt placed with the tip thereof facing outward. The cover is provided, on the inner surface thereof in a position corresponding to the nut, with a protrusion having a height set in a manner such that the protrusion does not interfere with the nut located in a fastened position, but interferes with the nut located in another position other than the fastened position. A thin portion is formed on the circumference of the protrusion.