Connection Terminal Flat Setting Surface Wire Positioning

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Solution Overview

Problem

Conventional connection terminals for electrical wires in stators often result in unstable electrical connections due to incorrect wire positioning, leading to increased resistance and abnormal heat generation during crimping.

Innovation Solution

A connection terminal design featuring a bottom wall with a flat setting surface and upstanding crimping pieces, where the flat surface width satisfies the condition W ≥ (N-1) × 2R, and optional projections for precise wire positioning, ensuring wires are securely held and crimped without displacement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If electrical wires are positioned on a conventional U-shaped connection terminal without a flat setting surface, then the structure is simple, but the wires can move and displace to one crimping piece causing unstable electrical connection

Engineering Contradiction:
Improveelectrical connection stabilityVSAvoidconnection terminal structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The flat setting surface is provided on the bottom wall before the crimping operation to preliminarily position and stabilize the electrical wires. This preliminary positioning action prevents wire displacement during crimping, ensuring that wires are correctly positioned between the crimping pieces from the start, thereby improving electrical connection stability without requiring complex additional components.

Inventive Principle:
Principle #10Preliminary action

2Ease of operation

If electrical wires are allowed to move freely on the connection terminal, then the ease of insertion is improved, but the wires may close contact and cause resistance increase and abnormal heat

Engineering Contradiction:
Improvewire insertion easeVSAvoidresistance increase and heat generation
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The flat setting surface provides a specific localized region with improved positioning properties. This local quality enhancement creates a stable platform that maintains proper wire spacing and prevents harmful close contact, thereby reducing resistance and heat generation while still allowing easy wire insertion onto the flat surface.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS7462081B2Connection terminal and stator having distributor unit utilizing same
Publication Date: 2008.12.09 YAZAKI CORP
  • US7462081B2 patent drawing
  • US7462081B2 patent drawing
  • US7462081B2 patent drawing

AI summary

The present invention provides a connection terminal for holding a plurality of electrical wires ends in place prior to crimping the connection terminal without displacement of the wires ends, and a stator utilizing the connection terminal. The stator includes a distributor unit for supplying electric current to a coil unit through the electrical wires. The distributor unit has the connection terminal to be connected with the wires ends. The connection terminal has a bottom wall with a setting surface of a flat surface prior to crimping the connection terminal. The stator has a guide surface disposed on a brim of a bobbin adjacent to a holder for holding the electrical wires. The guide surface is flush with the flat surface of the connection terminal.