Fuse Block Rocking Restriction via Arm Portion Engagement
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Solution Overview
Problem
Existing electrical connection boxes in automobiles face difficulties in restricting the rocking motion of fuse blocks, which can lead to instability and improper attachment, especially when the edge of the frame acts as a fulcrum.
Innovation Solution
Incorporating rocking restricting portions on both the frame and the arm portions of the fuse block, which engage with each other to prevent displacement in orthogonal directions, ensuring stable attachment and preventing rocking by guiding the fuse block to its prescribed position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the fuse block is affixed to the frame at two points along the length of the fuse block, then oblique displacement of the fuse block in relation to the side of the frame can be restricted, but it is difficult to restrict rocking of the fuse block in which the edge of the frame serves as a fulcrum
Solution Approach 1:
The fuse block is divided into a main body portion and an arm portion that extends downward from an end of the main body portion. The arm portion is separately engaged with the frame through rocking restricting portions, segmenting the attachment function to specifically address rocking prevention at the edge fulcrum point.
Solution Approach 2:
Rocking restricting portions are introduced as intermediary elements formed in the side edge portion of the frame and in the arm portion of the fuse block. These intermediary structures engage with one another to specifically prevent rocking motion, acting as a mediator between the frame and fuse block to eliminate the fulcrum effect.
2Device complexity
If the fuse block is mounted along one edge of the frame, then the structure is simplified, but rocking motion occurs with the edge of the frame serving as a fulcrum
Solution Approach 1:
The fuse block structure incorporates an arm portion that extends downward from the main body portion, creating a dynamic engagement system. The arm portion works with rocking restricting portions to actively counteract rocking motion rather than relying on static attachment points, allowing the structure to adapt and resist rocking forces.
Solution Approach 2:
The solution adds a vertical dimension to the attachment system by having the arm portion extend downward from the main body portion along a side edge portion of the frame. This creates engagement in multiple dimensions (horizontal positioning plus vertical restriction), preventing rocking motion that would occur with simple edge mounting.
Data Source
AI summary
A fuse block 23 includes a main body portion 34, which is arranged along a top edge portion 21a of a frame 21, and an arm portion 35, which extends from an end of the main body portion 34 along a side edge portion 21b of the frame 21 that is roughly orthogonal to the top edge portion 21a. The mutual engagement of rocking restricting portions 31 and 41 that are provided on the side edge portion 21b of the frame 21 and the arm portion 35 restricts displacement of the arm portion 35 in relation to the side edge portion 21b of the frame 21 in a direction orthogonal to the length direction of the side edge portion 21b. This prevents rocking of the fuse block 23 in which the top edge portion 21a of the frame 21 serves roughly as a fulcrum.