# US 8,771,015 B2 · Terminal structure of wiring harness

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- Number: US 8,771,015 B2
- Document ID: US8771015B2
- Status: Granted
- Kind: B2
- Application number: 13/699,940
- Filed: 2011-07-04
- Published: 2013-03-21
- Granted: 2014-07-08
- Earliest claimed: 2010-07-23
- Assignees: Autonetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd.
- Applicants: Masato Inoue; Kazunari Sakura; Hiroshi Sudou; Yukiyasu Sakamoto; Hiroshi Yamaguchi; Hisahiro Yasuda; Tetsuya Nakamura; Shigeyuki Tanaka; Naoya Nishimura; Daisuke Hashimoto; Yukou Sato
- Inventors: Masato Inoue; Kazunari Sakura; Hiroshi Sudou; Yukiyasu Sakamoto; Hiroshi Yamaguchi; Hisahiro Yasuda; Tetsuya Nakamura; Shigeyuki Tanaka; Naoya Nishimura; Daisuke Hashimoto; Yukou Sato
- Web page: https://patentgrep.com/patent/US8771015B2

## CPC

- H01R 4/70: Insulation of connections (end caps H01R4/22)
- H01R 4/185: {combined with a U-shaped insulation-receiving portion}
- H01R 4/62: Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors (H01R4/68 takes precedence)
- H01R 2201/26: for vehicles
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

A terminal structure of a wiring harness for automobile use having a profound anticorrosive effect. A terminal member is fixed to a terminal portion of a coated electric wire such that a crimping portion that the member includes at its one end is crimped around a coating portion of the wire in a terminal region of the wire. A resin member completely covers at least entire outer surfaces of an exposed region at an end portion of the crimping portion and its vicinal region, and is made from a material mainly containing a thermoplastic polyamide resin, and having a tensile lap-shear strength of lapped aluminums of 6 N/mm2 or more in accordance with the JIS K6850, an elongation of 100% or more in accordance with the ASTM D-1708, and a water absorption of 1.0% or less in accordance with the JIS K7209.

## Claims

### Claim 1

A terminal structure of a wiring harness for automobile use, the terminal structure comprising:
a coated electric wire comprising:
a plurality of bare conductors;
a coating portion with which the bare conductors are coated; and
an exposed portion at an end of the electric wire, where the conductors are exposed;
a terminal member that is fixed to the coated electric wire, and comprises a crimping portion at its one end that is fixed to the coated electric wire by being crimped around an outer surface of the coating portion of the electric wire in the vicinity of the exposed portion; and
a resin member that covers at least an entire outer surface of an exposed region at an end portion of the crimping portion, and an entire outer surface of a region in the vicinity of the exposed region,
wherein the resin member is made from a material that mainly contains a thermoplastic polyamide resin, and has
a tensile lap-shear strength of lapped aluminums of 6 N/mm2 or more, which is measured in accordance with the JIS K6850;
an elongation of 100% or more, which is measured in accordance with the ASTM D-1708; and
a water absorption of 1.0% or less, which is measured in accordance with the JIS K7209.

### Claim 2 (depends on 1)

The terminal structure according to claim 1, wherein the thermoplastic polyamide resin contains:
at least one of a dimer acid and a dicarboxylic acid; and
a diamine.

### Claim 3 (depends on 2)

The terminal structure according to claim 2, wherein the terminal member comprises a plated region that defines a surface that is coated with plating, and
wherein the exposed region at the end portion of the crimping portion comprises a no-plated region that is uncoated with plating.

### Claim 4 (depends on 3)

The terminal structure according to claim 3, wherein
the bare conductors are made from a material containing aluminum,
the terminal member is made from a material containing copper, and
the plating for the plated region is made from a material containing tin.

### Claim 5 (depends on 1)

The terminal structure according to claim 1, wherein the terminal member comprises a plated region that defines a surface that is coated with plating, and
wherein the exposed region at the end portion of the crimping portion comprises a no-plated region that is uncoated with plating.

### Claim 6 (depends on 5)

The terminal structure according to claim 5, wherein
the bare conductors are made from a material containing aluminum,
the terminal member is made from a material containing copper, and
the plating for the plated region is made from a material containing tin.