Fuse Housing Removable Protrusions Prevent Misassembly
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Solution Overview
Problem
Users face difficulties in differentiating and correctly assembling multi-pole fusible links with similar shapes in a fuse box, leading to potential misassembly, and existing solutions either rely on costly die changes for housing shape modifications or inadequate marking for differentiation.
Innovation Solution
A housing with removable misassembly-preventing protrusions that correspond to specific recesses in the fuse box, allowing for physical prevention of incorrect placement and cost-effective differentiation between multi-pole fusible links of different types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If marks are printed on the housing to differentiate multi-pole fusible link types, then user differentiation ability is improved, but misassembly prevention is insufficient
Solution Approach 1:
The patent introduces an intermediary mechanical feature (protrusion) that mediates between the housing and fuse box, providing both identification and physical prevention functions. The protrusion acts as a mediator that translates type information into a physical constraint, preventing misassembly by making incompatible fittings mechanically impossible.
2Reliability
If the shape of the housing is changed depending on the types of multi-pole fusible links, then misassembly is physically prevented, but manufacturing costs increase due to new dies
Solution Approach 1:
The patent segments the housing into a common base structure and a removable protrusion feature. This segmentation allows the main housing body to remain identical across all types (using the same die), while only the small protrusion feature varies by type. The protrusion can be added or removed through simple post-processing operations, avoiding the need for expensive complete die changes.
Solution Approach 2:
The common housing design serves multiple functions: it provides the basic protective structure, maintains electrical insulation, and accommodates different protrusion configurations for various fuse types. This universal base design reduces manufacturing complexity while the protrusion provides type-specific functionality.
3Ease of manufacture
If a common housing is used for various types of multi-pole fusible links, then manufacturing costs are reduced, but user differentiation between types becomes difficult
Solution Approach 1:
The patent applies local quality by making only a small local modification (the protrusion) to an otherwise common housing design. This local feature provides all the necessary type identification information, while the rest of the housing remains identical. Users can easily differentiate types by checking the presence or absence of this small protrusion, and the common housing design maintains manufacturing efficiency.
Data Source
AI summary
The present invention provides a housing, fuse, and fuse box, with which it is possible to differentiate a multi-pole fusible link and prevent misassembly, while holding down costs. This housing is attached to a multi-pole fusible link contained within a containing part of a fuse box, and is provided with misassembly-preventing protrusions which are removable according to the type of multi-pole fusible link, the locations of the misassembly-preventing protrusions corresponding to the locations of recesses which are provided to the containing part that is to contain the multi-pole fusible link, and in which the misassembly-preventing protrusions can be contained.