Connection structure between electric wire and terminal, connection method between electric wire and terminal, and terminal

1. An electrical connection structure for connecting an electric wire and a terminal, the electrical connection structure comprising:

an electric wire including a core wire, the core wire having a plurality of strands; and

a terminal including a bottom-plate portion and a pair of core-wire-crimping pieces, which protrude from both edges of the bottom-plate portion, and each distal-end portion of the pair of core-wire-crimping pieces is divided into a plurality of portions, the terminal enclosing and holding the core wire by the bottom-plate portion and the pair of core-wire-crimping pieces,

wherein the pair of core-wire-crimping pieces extend in directions to approach each other at proximal-end portions, are in contact with each other at intermediate portions, and extend in directions to be separated from each other at the distal-end portions, and

at least one portion of the plurality of portions of each distal-end portion of each core-wire crimping piece of the pair of core-wire-crimping pieces extends in a different direction from other portions of each distal-end portion of each core-wire crimping piece of the pair of core-wire-crimping pieces in bending directions.

2. The electrical connection structure for connecting an electric wire and a terminal according to claim 1 , wherein

each distal-end portion of the pair of core-wire-crimping pieces of the terminal is formed with a plurality of convex portions provided at a predetermined interval in the longitudinal direction of the electric wire, or

each distal-end portion of the core-wire-crimping pieces is formed with a plurality of portions delimited by a plurality of slits provided at a predetermined interval in the longitudinal direction of the electric wire.

3. A terminal comprising:

a bottom-plate portion; and

a pair of core-wire-crimping pieces protruding from both edges of the bottom-plate portion and each of the pair of core-wire crimping pieces having a distal-end portion divided into multiple parts individually separated in a longitudinal direction of the terminal, each of the pair of core-wire-crimping pieces standing in a height direction of the terminal from the bottom-plate portion,

wherein a first part included in the multiple parts of each distal-end portion of each core wire crimping piece of the pair of core-wire-crimping pieces extends in a different direction from a second part included in the multiple parts of each distal-end portions of each core wire crimping piece of the pair of core-wire-crimping pieces,

wherein a distance, in the width direction of the terminal, between the first part and the second part gradually changes toward a distal end side in the height direction of the terminal.

4. An electrical connection method for connecting an electric wire and a terminal, the electrical connection method comprising:

removing a sheath at a part of an electric wire that includes a core wire having a plurality of strands and a sheath covering the core wire;

installing the core wire exposed by removing the sheath onto a core-wire-crimping portion that includes a bottom-plate portion and a pair of core-wire-crimping pieces protruding from both edges of the bottom-plate portion and each of the pair of core-wire crimping pieces having distal-end portions divided into a plurality of portions such that at least one portion of the plurality of portions of each distal-end portion of each core-wire crimping piece of the pair of core-wire-crimping pieces extends in a different direction from other portions of the distal-end portion in bending directions of each core-wire crimping piece of the pair of core-wire-crimping pieces; and

enclosing and holding the core wire by the bottom-plate portion and the pair of core-wire-crimping pieces such that the pair of core-wire-crimping pieces extend in directions to approach each other at a proximal-end portion, are in contact with each other at an intermediate portion, and extend in directions to be separated from each other at the distal-end portion, and at least one portion of the plurality of portions of each distal-end portion extend in the different direction from the other portions of the distal-end portion, after installing the core wire on the core-wire-crimping portion.

5. An electrical connection structure for connecting an electric wire and a terminal, the electrical connection structure comprising:

an electric wire including a core wire, the core wire having a plurality of strands;

a terminal including a bottom-plate portion and a pair of core-wire-crimping pieces, which protrude from both edges of the bottom-plate portion and each distal-end portion of the pair of core-wire-crimping pieces being formed with a plurality of convex portions, the terminal enclosing and holding the core wire by the bottom-plate portion and the pair of core-wire-crimping pieces,

wherein the pair of core-wire-crimping pieces extends in directions to approach each other at a proximal-end portion and is in contact with each other at an intermediate portion, and the respective convex portions of the distal-end portion extend in directions to be separated from each other, and

at least one convex portion of the plurality of convex portions of each distal-end portion of each core wire crimping piece of the pair of core-wire-crimping pieces extends in a different direction from other convex portions of the plurality of convex portions of each distal-end portion of each core wire crimping piece in bending directions of the pair of core-wire-crimping pieces.