Automotive Junction Box Tapered Face Alignment
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Solution Overview
Problem
Conventional electrical junction boxes for automobiles require visual positioning of lock portions, complicating the attachment process of the block to the frame.
Innovation Solution
The electrical junction box features a frame with four surrounding faces, at least two of which have tapered faces to guide the block to a proper attachment position, allowing for easy attachment without visual positioning, and includes a double wall structure with extended ribs to accommodate the tapered faces without increasing the frame's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If visual positioning of lock portions and lock receive portions is required for attachment, then attachment precision can be ensured, but the attachment process becomes complicated and time-consuming
Solution Approach 1:
The tapered faces are provided on the frame in advance before attachment, which guide the block during the attachment process. This preliminary structural feature eliminates the need for visual positioning by automatically aligning the block with the frame through the tapered guidance surfaces, thus simplifying the attachment operation while ensuring precise engagement of the lock portions.
2Ease of operation
If tapered faces are added to guide the block to proper attachment position, then ease of operation is improved, but the frame structure becomes more complex
Solution Approach 1:
The tapered faces are provided only on specific local regions of the frame - specifically on at least two intersecting faces where the block makes contact during attachment. This localized application of the tapered feature provides the necessary guidance function without requiring the entire frame structure to be modified, thus minimizing the increase in overall structural complexity.
3Productivity
If the block is guided to proper attachment position using tapered faces, then attachment time is reduced, but the frame requires additional structural features
Solution Approach 1:
The tapered faces utilize inclined planar surfaces that guide the block through a controlled sliding motion during attachment. This curved/angled surface geometry allows the block to be rapidly guided to the correct position without requiring complex mechanical guidance mechanisms, thus improving attachment speed while keeping the structural addition relatively simple.
Data Source
AI summary
Provided is an electrical junction box which can easily attach a block to an inner side of a frame without the need for visual positioning of a lock portion of the block and a lock receive portion of the frame. An electrical junction box includes a frame and a block to be attached to an inner side of the frame. The block includes a lock portion, and the frame includes a lock receive portion to which the lock portion engages. Four faces of the frame arranged to surround the block include a tapered face for guiding the block to a proper attachment position. The frame includes a double wall including an outer wall and an inner wall, and a rib connecting the outer wall and the inner wall. The rib is extended above the inner wall, and the tapered face is provided to an extended portion of the rib.