Slanted Standing Piece Bus Bar for Round Terminal Fixation
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Solution Overview
Problem
Conventional round terminal fixation structures face issues with deformed fixation due to accidental tightening and difficulty in installation, as the rotation restriction piece can hinder the insertion of the round terminal and may lead to overlooked assembling failures.
Innovation Solution
A round terminal fixation structure with a bus bar featuring a standing piece and a second standing piece, both slanted towards the flat plate portion, to prevent rotation and facilitate easy installation by creating a wider space for the round terminal, and to ensure correct positioning and prevent deformed fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotation restriction piece is used to prevent rotation of the round terminal, then the reliability of fixation is improved, but the ease of operation deteriorates because the rotation restriction piece hinders the insertion of the round terminal
Solution Approach 1:
The rotation restriction piece is designed with a distal end that is slanted in a direction toward the flat plate portion from the through-hole. This slanted configuration changes the spatial dimension of the restriction piece, creating a wider insertion space that facilitates easier installation while maintaining the rotation prevention function.
2Reliability
If the height of the rotation restriction piece is increased to reliably restrict rotation, then the reliability of fixation is improved, but the ease of operation deteriorates because the space for inserting the round terminal is decreased
Solution Approach 1:
By slanting the distal end of the rotation restriction piece toward the flat plate portion, the effective insertion space is expanded in the horizontal dimension while the height of the restriction piece is maintained sufficient for reliable rotation prevention.
Solution Approach 2:
The rotation restriction piece has an asymmetric cross-section with one slanted surface facing the through-hole and another surface facing away. This asymmetric design creates a tapered profile that guides the round terminal during insertion while maintaining adequate height for rotation restriction.
3Productivity
If the round terminal is accidentally tightened while located over the rotation restriction piece, then the manufacturing process continues, but the manufacturing precision deteriorates because the round terminal becomes fixed in a deformed fashion
Solution Approach 1:
The slanted distal end of the rotation restriction piece is positioned to abut on the core wire crimp portion before the bolt is fully tightened. This preliminary contact prevents the round terminal from being forced into a deformed position if tightening occurs before proper alignment, as the slanted surface guides the terminal into correct positioning.
Solution Approach 2:
The rotation restriction piece, which could potentially cause deformation if misaligned, is designed with a slanted surface that converts the harmful effect of premature tightening into a beneficial guiding action. The slanted surface actively pushes the round terminal into correct alignment as the bolt is tightened, transforming a potential defect into a self-correcting mechanism.
Data Source
AI summary
Provided is a round terminal fixation structure which can easily install a round terminal at a fixation position and prevent assembling failure. The round terminal fixation structure fixes the round terminal connected to an end of an electric wire to a bus bar in an overlapping fashion by a bolt. The round terminal includes a bolt insertion portion having a first through-hole for passing the bolt and a core wire crimp portion crimping a core wire of the electric wire. The bus bar includes a flat plate portion having a second through-hole for passing the bolt and a standing piece extending perpendicularly from the flat plate portion and configured to abut on the core wire crimp portion when bolting the round terminal to prevent rotation of the round terminal. A distal end of the standing piece is slanted towards the flat plate portion with distance from the second through-hole.