Crimp terminal and electric wire with crimp terminal

Patent metadata

Field	Value
Publication number	US-9787003-B2
Application number	US-201314909897-A
Country	US
Kind code	B2
Filing date	Aug 8, 2013
Priority date	Aug 6, 2013
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A crimp terminal includes an F-type crimp portion and a C-type crimp portion. The F-type crimp portion has first and second barrel tabs, preferably with an identical length, for crimping a tip end of a complex stranded wire. The F-type crimp portion is adapted to have distal ends of the first and second barrel tabs put together and pushed into the tip end of the complex stranded wire to be crimped. The C-type crimp portion has a third barrel tab for crimping the complex stranded wire. The third barrel tab is wound in a C-form on an outer periphery of the complex stranded wire to be crimped. The arrangement provides a crimp terminal and an electric wire with crimp terminal, that prevents or reduces increases in retained resistance at a crimp portion, and can also prevent an electric wire from slipping out of a crimp terminal.

First claim

The invention claimed is:

1. A crimp terminal of an open barrel type adapted to fix, by crimping, an electric wire including a complex stranded wire having a set of conductor element wires wound on an outer periphery of a reinforcement wire, the reinforcement wire having a strength greater than strengths of the conductor element wires, the crimp terminal comprising:
an F-type crimp portion comprising a first and a second barrel tab, the first and the second barrel tab being disposed at opposite locations with a longitudinal centerline of the complex stranded wire to be crimped in between, the first and the second barrel tab having an identical length, the F-type crimp portion being configured to have distal ends of the first and the second barrel tab put together to push into a tip end of the complex stranded wire to be crimped; and
a C-type crimp portion comprising a third barrel tab adapted to crimp the complex stranded wire, the C-type crimp portion being configured to have the third barrel tab wrapped in a C-form on an outer periphery of the complex stranded wire to be crimped, wherein the F-type crimp portion to be deformed to crimp the tip end of the complex stranded wire comprises a single convex projection provided at a central part thereof in a longitudinal direction of the complex stranded wire,
wherein the first barrel tab to be deformed to crimp the tip end of the complex stranded wire comprises a first pair of protruding parts provided at a distal end thereof,
wherein the second barrel tab to be deformed to crimp the tip end of the complex stranded wire comprises a second pair of protruding parts provided at a distal end thereof, and
wherein the first pair of protruding parts and the second pair of protruding parts are configured for cooperation with the single convex projection to push local regions on the reinforcement wire residing at both sides of the single convex projection at the tip end of the complex stranded wire, to deform the reinforcement wire at the tip end of the complex stranded wire, as the F-type crimp portion is deformed to crimp the tip end of the complex stranded wire.

2. The crimp terminal according to claim 1 , wherein the first pair of protruding parts and the second pair of protruding parts have a protrusion length equal to or greater than one third of a diameter of the complex stranded wire.

3. The crimp terminal according to claim 1 , wherein the C-type crimp portion comprises a fourth barrel tab configured to crimp the complex stranded wire.

4. A crimp terminal of an open barrel type adapted to fix, by crimping, an electric wire including a complex stranded wire having a set of conductor element wires wound on an outer periphery of a reinforcement wire, the reinforcement wire having a strength greater than strengths of the conductor element wires, the crimp terminal comprising:
an F-type crimp portion comprising a first and a second barrel tab, the first and the second barrel tab being disposed at opposite locations with a longitudinal centerline of the complex stranded wire to be crimped in between, the first and the second barrel tab having an identical length, the F-type crimp portion being configured to have distal ends of the first and the second barrel tab put together to push into a tip end of the complex stranded wire to be crimped; and
a C-type crimp portion comprising a third barrel tab adapted to crimp the complex stranded wire, the C-type crimp portion being configured to have the third barrel tab wrapped in a C-form on an outer periphery of the complex stranded wire to be crimped, wherein the F-type crimp portion to be deformed to crimp the tip end of the complex stranded wire comprises a pair of convex projections arrayed in an axial direction of the complex stranded wire, and provided at local parts of the F-type crimp portion for the complex stranded wire to be brought into contact therewith,
wherein the first barrel tab to be deformed to crimp the tip end of the complex stranded wire comprises a first protruding part provided at a central part in a longitudinal direction of the complex stranded wire at a distal end of the first barrel tab,
wherein the second barrel tab to be deformed to crimp the tip end of the complex stranded wire comprises a second protruding part provided at a central part in a longitudinal direction of the complex stranded wire at a distal end of the second barrel tab, and
wherein the first protruding part and the second protruding part are configured for cooperation with the pair of convex projections to push a local region on the reinforcement wire residing between the pair of convex projections at the tip end of the complex stranded wire, to deform the reinforcement wire at the tip end of the complex stranded wire, as the F-type crimp portion is deformed to crimp the tip end of the complex stranded wire.

5. The crimp terminal according to claim 4 , wherein the first protruding part and the second protruding part have a protrusion length equal to or greater than one third of a diameter of the complex stranded wire.

6. The crimp terminal according to claim 4 , wherein the C-type crimp portion comprises a fourth barrel tab configured to crimp the complex stranded wire.

7. An electric wire with a crimp terminal including a complex stranded wire having a set of conductor element wires wound on an outer periphery of a reinforcement wire, the reinforcement wire having a strength greater than strengths of the conductor element wires,
wherein the electric wire is fixed, by crimping, to the crimp terminal that includes an F-type crimp portion and a C-type crimp portion,
wherein the F-type crimp portion comprises a first and a second barrel tab, the first and the second barrel tab being disposed at opposite locations with the complex stranded wire in between, the first and the second barrel tab having an identical length, the first and the second barrel tab having distal ends thereof put together and pushed into the complex stranded wire, to crimp a tip end of the complex stranded wire,
wherein the C-type crimp portion comprises a third barrel tab, the third barrel tab being wrapped in a C-form on an outer periphery of the complex stranded wire, to crimp the complex stranded wire,
wherein the F-type crimp portion to be deformed to crimp the tip end of the complex stranded wire comprises a single convex projection provided at a central part thereof in a longitudinal direction of the complex stranded wire,
wherein the first barrel tab to be deformed to crimp the tip end of the complex stranded wire comprises a first pair of protruding parts provided at a distal end thereof,
wherein the second barrel tab to be deformed to crimp the tip end of the complex stranded wire comprises a second pair of protruding parts provided at a distal end thereof, and
wherein the first pair of protruding parts and the second pair of protruding parts are configured for cooperation with the single convex projection to push local regions on the reinforcement wire residing at both sides of the single convex projection at the tip end of the complex stranded wire, to deform the reinforcement wire at the tip end of the complex stranded wire, as the F-type crimp portion is deformed to crimp the tip end of the complex stranded wire.

8. The electric wire with crimp terminal according to claim 7 , wherein the conductor element wires comprise aluminum element wires, and the reinforcement wire comprises a steel wire having an aluminum-plated outer periphery adapted to have suppressed corrosion with the aluminum element wires.

9. An electric wire with a crimp terminal including a complex stranded wire having a set of conductor element wires wound on an outer periphery of a reinforcement wire, the reinf

Assignees

• Nisshin Steel Co Ltd

Inventors

• Kamoshida Shinichi
• Miono Tadaaki
• Hattori Yasunori
• Shimizu Takeshi
• Suzuki Mitsuru

Classifications

• H01B5/104

  composed of metallic wires, e.g. steel wires · CPC title

• H01R4/62 Primary

  Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors (H01R4/68 takes precedence) · CPC title

• H01R4/188 Primary

  having an uneven wire-receiving surface to improve the contact · CPC title

• H01R4/183 Primary

  for cylindrical elongated bodies, e.g. cables having circular cross-section (H01R4/01 takes precedence) · CPC title

• H01R4/185

  combined with a U-shaped insulation-receiving portion · CPC title