Fusible Link Unit Cover Fixing Against Vibration Rattle

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Solution Overview

Problem

Conventional fusible link units experience rattling and abnormal sound generation due to vehicle vibrations, as the fuse cover is only secured by engagement of a lock portion with a recess portion, leading to instability.

Innovation Solution

A fusible link unit design where the fuse cover is fixed between the battery and a deck board, with plane contact surfaces ensuring stable surface-contact fixation, preventing rattling and abnormal sounds during vehicle vibrations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the fuse cover is fixed only by engagement of the lock portion with the recess portion, then the structure is simple and easy to assemble, but the fuse cover rattles during vehicle vibration causing abnormal sounds

Engineering Contradiction:

Improvefixing structureVSAvoidabnormal sound

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent combines multiple fixing mechanisms: the lock portion engagement between the fuse cover and fuse unit, plus the clamp portion engagement between the fuse unit and battery, creating a unified fixing system that eliminates rattling while maintaining simplicity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces a second engagement dimension by adding the clamp portion that connects the fuse unit to the battery clamp, creating a multi-dimensional fixing system that prevents rattling in addition to the original lock portion engagement

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of operation

If the fuse cover is secured by lock portion engagement only, then assembly is easy, but fixation stability is insufficient under vibration

Engineering Contradiction:

Improveassembly easeVSAvoidfixation stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The patent merges two fixing functions into one integrated fuse unit structure: the lock portion for cover retention and the clamp portion for battery attachment, achieving both ease of assembly and high stability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fuse unit acts as an intermediary component that provides multiple engagement points: the lock portion engages with the fuse cover and the clamp portion engages with the battery clamp, mediating between these components to achieve stable fixation

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10636605B2Fusible link unit

Publication Date: 2020.04.28 YAZAKI CORP

AI summary

A fusible link unit (1) includes a battery (5) with a battery post (3) projecting on an upper surface of the battery (5), a fuse unit (9) arranged on the upper surface of the battery (5) and having a battery terminal (7) connected to the battery post (3), and a fuse cover (11) covering an outer circumference of the fuse unit (9). A deck board (13) is arranged above the fuse cover (11) so as to be capable of being opened and closed. The fuse cover (11) is fixed by being held between the battery (5) and the deck board (13) in a closed state of the deck board (13).