Fuse-Puller Holding Structure with Lever Fulcrum
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Solution Overview
Problem
Existing fuse-puller holding structures in electrical connection boxes require strong retention forces to prevent detachment, which makes it difficult to smoothly remove the fuse puller and can lead to deformation or breakage of the support due to the high forces required.
Innovation Solution
A fuse-puller holding structure with an engagement portion and a rib portion that applies the law of the lever to reduce the detachment force, where the rib portion acts as a fulcrum and the engagement portion as a point of load, allowing the fuse puller to be held with appropriate strength while enabling smooth removal without deforming the support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a strong falling-off prevention operation is provided by the engagement portion, then the fuse puller can be held securely, but a strong force is required to detach the fuse puller which impairs convenience
Solution Approach 1:
The support is divided into multiple functional portions: a holding portion that secures the fuse puller, and a detachment portion with an inclined surface that facilitates easy removal. This segmentation allows the support to provide both strong holding and easy detachment functions through different structural regions.
Solution Approach 2:
The detachment portion uses an inclined surface that reverses the engagement mechanism. While the holding portion uses engagement protrusions for secure attachment, the detachment portion uses an inclined surface that allows the fuse puller to be easily pushed off by applying force in the opposite direction, transforming the engagement structure into a release mechanism.
2Reliability
If the engagement portion provides strong retentive force, then the fuse puller is held stably, but the support may deform or break due to large load when the fuse puller cannot be detached smoothly
Solution Approach 1:
The support is divided into a holding portion for stable retention and a detachment portion with an inclined surface for easy removal. This segmentation prevents concentration of stress on a single structure, allowing the holding portion to provide stability while the detachment portion facilitates smooth removal to avoid excessive loads.
Solution Approach 2:
The support transitions from a static engagement structure to a dynamic one with an inclined surface. The inclined surface allows the support to adapt during detachment by providing a gradual transition path, reducing impact forces and preventing sudden stress concentration that could cause deformation or breakage.
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
The structure allows for the fuse puller to be held securely and easily detached with a lower force, reducing the risk of support deformation or breakage, enhancing usability and stability while maintaining cost-effectiveness.
Implementation Method 1
a rib portion serving as a fulcrum and an engagement portion serving as a point of load at a time when a predetermined position of the fuse puller serves as a point of effort
Data Source
AI summary
A fuse-puller holding structure, in which a fuse puller used for detachment of a fuse is held by a fuse-puller holding object provided in a vehicle, includes: an engagement portion and a rib portion. The rib portion is provided at a position opposite to a predetermined position of the fuse puller across a support such that the rib portion serves as a fulcrum with the engagement portion as a point of load at the time when the predetermined position of the fuse puller is assumed a point of effort, and the rib portion being provided at a position at which a distance between the point of load and the rib portion is not more than a distance between the point of effort and the point of load. The fuse puller is held by the support so as to be distanced from the mounting surface of the fuse-puller holding object.