Fuse Unit Guide Wall Inclined Cover Attachment
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Solution Overview
Problem
Existing fuse units face challenges in ensuring easy attachment of covers to housings and preventing unintentional falling off, particularly due to insufficient positioning and gravitational forces.
Innovation Solution
The fuse unit design incorporates a guide wall that is inclined to intersect the separation direction, guiding the cover during attachment and featuring an abutment portion to prevent misalignment and falling off, ensuring the fusible portion remains covered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a U-shaped cover is mounted on the housing to cover the fusible portion, then scattering of fused matter is prevented, but the cover may unintentionally fall off due to insufficient attachment security
Solution Approach 1:
The guide wall is designed with an inclined curved surface that guides the cover during attachment. The curvature of the guide wall intersects with the separation direction, creating a self-aligning mechanism that prevents unintentional falling off while maintaining easy attachment through the guiding action
Solution Approach 2:
The attachment mechanism introduces a directional component by inclining the guide wall at an angle to the separation direction. This dimensional change creates a mechanical interlock effect where the cover must follow the inclined path, preventing reverse movement without requiring complex fastening operations
2Ease of operation
If the cover is designed to be easily attached to the housing, then attachment operation is simplified, but positional deviation may occur during attachment
Solution Approach 1:
The guide wall acts as an intermediary element between the cover and housing during attachment. It provides a controlled path that simultaneously enables easy attachment through guidance while ensuring precise positioning by constraining the cover to follow the inclined surface to its designated position
Solution Approach 2:
The guide wall performs preliminary positioning action during the attachment process. By providing an inclined guiding surface before the cover reaches its final position, it pre-aligns the cover correctly, preventing positional deviation while maintaining operational simplicity
Data Source
AI summary
A fuse unit includes a fuse element which includes a fusible portion, a housing which accommodates the fuse element in a state that the fusible portion is exposed to an outside thereof, and a cover which is attached to the housing so as to cover the fusible portion. The cover includes a pair of side wall portions which is disposed so as to face each other with the fusible portion interposed therebetween, and a connection portion which connects the pair of side wall portions. The housing includes a guide wall which is configured to guide the cover toward the fusible portion when the cover is attached to the housing. The guide wall is inclined to a direction intersecting a separation direction in which the cover is separated from the housing.