Terminal Pressing Portion for Secure Electric Wire Holding
Solution Overview
Problem
The challenge is to enhance the holding force of terminals on electric wires with reduced diameters while maintaining sufficient strength, as using stronger conductive materials can cause terminal deformation during connection.
Innovation Solution
The electric cable features a terminal with a holding portion and a pressing portion, including protrusions and recesses that fit together to increase the holding force, along with additional retaining sections and markers for improved positioning and connection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the conductive material having higher strength is used for the electric wires, then the strength of the electric wires is improved, but the terminal may be deformed during connecting
Solution Approach 1:
The terminal is divided into multiple functional portions: a holding portion for gripping the wire and a pressing portion for applying crimping force. This segmentation allows the holding portion to maintain its shape while the pressing portion transmits the crimping force, preventing deformation of the terminal body when using high-strength wires.
Solution Approach 2:
The holding portion acts as an intermediary between the pressing portion and the electric wire. It receives the crimping force from the pressing portion and transmits it to the wire, while its elastic material properties allow it to deform temporarily during crimping and then recover, preventing permanent deformation of the terminal structure.
2Strength
If the terminal is crimped on the electric wire with higher strength material, then the connection strength is improved, but the holding force may be insufficient due to terminal deformation
Solution Approach 1:
The invention changes the material parameter of the terminal from rigid metal to elastic material with appropriate elasticity. This parameter change allows the terminal to deform elastically during crimping to accommodate the high-strength wire, then recover to maintain sufficient holding force, resolving the contradiction between connection strength and holding force.
3Weight of moving object
If the diameter of the electric wires is reduced, then the weight of the wire harness is reduced, but the strength of the electric wires becomes insufficient
Solution Approach 1:
The invention uses composite material strategy by combining high-strength conductive material for the wire with elastic material for the terminal. This allows the use of thinner, lighter wires while the elastic terminal compensates for the reduced wire strength through its deformation and recovery characteristics, maintaining sufficient connection reliability.
Data Source
AI summary
An electric cable including a terminal includes an electric wire and a female terminal. The female terminal includes a first holding portion and a second holding portion that hold the electric wire. The female terminal includes a first pressing portion and the second pressing portion pressing the first holding portion and the second holding portion toward the electric wire. The first holding portion and the second holding portion include a first protrusion and a second protrusion, respectively. The first protrusion and the second protrusion protrude toward the electric wire. A core wire of the electric wire includes a recess in which the first protrusion and the second protrusion are fitted.