Electric wire with terminal and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-11283200-B2
Application number	US-201716624606-A
Country	US
Kind code	B2
Filing date	Dec 20, 2017
Priority date	Jun 23, 2017
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

An electric wire with a terminal, includes an insulated wire which includes a core wire and an insulating layer covering the core wire, a seal member which is disposed in one end portion of the insulated wire and covers the insulating layer, a metal terminal which extends from the end portion of the insulated wire and is connected to the core wire and a waterproof resin portion which covers from a seal member covering part of the insulated wire to an electrical connection part of the metal terminal. The insulating layer contains an olefin resin. The waterproof resin portion contains a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof. The seal member includes an inner layer containing an ethylene resin and an outer layer laminated on the inner layer and containing a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof.

First claim

The invention claimed is:

1. An electric wire with a terminal, comprising:
an insulated wire which includes a conductive core wire and an insulating layer covering an outer periphery of the core wire;
a cylindrical seal member which is disposed in a vicinity of one end portion of the insulated wire and which covers an outer periphery of the insulating layer;
a metal terminal which extends from the end portion of the insulated wire and which is electrically connected to the core wire; and
a waterproof resin portion which covers at least a part from a seal member covering part of the insulated wire to an electrical connection part of the metal terminal,
wherein the insulating layer contains an olefin resin as a main component,
wherein the waterproof resin portion contains a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof as a main component,
wherein the seal member is formed of a heat-shrink tube which includes:
a cylindrical base layer containing an ethylene resin as a main component and being in contact with the insulating layer; and
an adhesive layer which is laminated on an outer peripheral side of the base layer, which contains a polyester, an ethylene-vinyl acetate copolymer, or a mixed resin of polyester and ethylene-vinyl acetate copolymer as a main component, and which is in contact with the waterproof resin portion, and

wherein the adhesive layer is not in contact with the core wire and the metal terminal.

2. A method of manufacturing an electric wire with a terminal, the method comprising:
cleaving a heat-shrink tube to have a predetermined length and then turning the cleaved heat-shrink tube inside out;
fitting the turned inside out heat-shrink tube onto a vicinity of one end portion of an insulated wire including a conductive core wire and an insulating layer covering an outer periphery of the core wire;
heating the fitted heat-shrink tube;
electrically connecting a metal terminal to the core wire at the end portion of the insulated wire;
disposing an inserting portion, which includes a part from the heat-shrink tube covering part of the insulated wire to an electrical connection part of the metal terminal, in a cavity of a mold; and
filling the cavity with molten resin composition,
wherein the insulating layer contains an olefin resin as a main component,
wherein the resin composition contains a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof as a main component, and
wherein the turned inside out heat-shrink tube includes:
a cylindrical base layer containing an ethylene resin as a main component, and
an adhesive layer which is laminated on an outer peripheral side of the base layer and which contains a polyester, an ethylene-vinyl acetate copolymer, or a mixed resin of polyester and ethylene-vinyl acetate copolymer as a main component.

Assignees

• Sumitomo Electric Industries
• Autonetworks Technologies Ltd
• Sumitomo Wiring Systems
• Sumitomo Electric Industies Ltd

Inventors

• Tanaka Shigeyuki
• Fujita Taro
• Nishikawa Shinya
• Nakashima Kazuo
• Nakamura Tetsuya

Classifications

• H01R43/005

  for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing · CPC title

• H01B7/285

  by completely or partially filling interstices in the cable · CPC title

• H01R43/24

  Assembling by moulding on contact members · CPC title

• H01R4/023

  between cables or wires and terminals · CPC title

• H01B7/02

  Disposition of insulation · CPC title