JP5051071B2 - Terminal fitting - Google Patents

Description

  The present invention relates to a terminal fitting.

A conventional terminal fitting is illustrated in FIG. This includes a board part 2 that extends in the front-rear direction and supports the electric wires 9, a box-like connection part 3 that is located on the front side of the board part 2 and is electrically connected to the counterpart connection part, and the board part 2. A wire barrel 4 that is positioned on the rear side and is crimped to the core wire 8 exposed at the end of the electric wire 9. The wire barrel 4 has a pair of barrel pieces 5 projecting from the substrate portion 2 to the same side so as to face each other. This type of terminal fitting is disclosed in Patent Document 1.
JP 11-219735 A

  By the way, when the wire barrel 4 is crimped to the core wire 8, the wire barrel 4 is set between the anvil (lower mold) and the crimper (upper mold), and the anvil and the crimper are brought close to each other. The process of caulking the wire barrel 4 is performed while the barrel piece 5 is bent. In this case, however, the bending operation of both barrel pieces 5 is performed exclusively on the crimper side, and a compressive force is applied to the surface facing the crimper side of both surfaces of the substrate portion 2, while the tensile force is applied to the surface facing the anvil side. Therefore, there may occur a vent-up in which the substrate portion 2 extends in the front-rear direction and warps and deforms in the direction of the arrow shown in FIG.

  The present invention has been completed based on the above circumstances, and an object thereof is to prevent the occurrence of vent-up of terminal fittings.

As means for achieving the above-mentioned object, the invention of claim 1 includes a substrate portion that extends in the axial direction and supports the electric wire, and a barrel piece that protrudes from the substrate portion, and the barrel piece is the electric wire. A wire barrel that is crimped to the core wire exposed at the terminal,
The barrel piece is characterized in that the barrel piece includes a first barrel piece and a second barrel piece that protrude in opposite directions orthogonal to each other from the substrate portion.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first barrel piece and the second barrel piece are substantially symmetrical with respect to the substrate portion.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the wire barrel includes a pair of first barrel pieces that protrude in opposite directions from both ends of the substrate portion before being crimped to the core wire. The pair of second barrel pieces is characterized by a substantially H-shape when viewed from the front.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the second barrel piece includes a pair of tongue pieces defined by a substantially H-shaped cut in the base plate portion. It is characterized by being bent in the opposite direction.

<Invention of Claim 1>
Since the first barrel piece and the second barrel piece protrude from the base plate in opposite directions orthogonal to each other, the bending operation of the first barrel piece and the second barrel piece is performed when the wire barrel is crimped to the core wire. The compressive force accompanying this is applied to both surfaces of the substrate portion. For this reason, it can avoid that a tensile force acts on either one side of a board | substrate part, and generation | occurrence | production of the vent up of a terminal metal fitting is prevented.

<Invention of Claim 2>
Since the first barrel piece and the second barrel piece are symmetrical with respect to each other with the substrate portion interposed therebetween, substantially equal compressive force is applied to both surfaces of the substrate portion, and the occurrence of vent-up is more reliably performed. Is prevented.

<Invention of Claim 3>
Before crimping to the core wire, the pair of first barrel pieces and the pair of second barrel pieces projecting from both ends of the substrate portion are substantially H-shaped in front view, so the first barrel piece and the second The balance of the bending movement of the barrel piece becomes smooth.

<Invention of Claim 4>
Since a pair of tongue pieces defined by a substantially H-shaped notch in which the second barrel piece is placed in the substrate portion are bent in a direction opposite to the first barrel piece, a wire having a substantially H shape when viewed from the front. The barrel can be easily formed from a single metal plate.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. The terminal fitting 10 according to the present embodiment is integrally formed by cutting a conductive metal plate into a predetermined shape and then bending it, and is connected to the end of the electric wire 90. The electric wire 90 includes a core wire 91 formed by twisting aluminum strands made of aluminum or an aluminum alloy containing a large amount of aluminum, and a resin insulating coating (not shown) that covers the core wire 91. At the end of the electric wire 90, the insulation coating is peeled off and the core wire 91 is exposed.

  As shown in FIG. 2, the terminal fitting 10 includes a strip-like board portion 11 that is elongated in the axial direction (front-rear direction), and a counterpart provided on the counterpart terminal fitting that is located on the front side of the board portion 11. A wire barrel that is electrically connected to the side connection portion and a wire barrel that is crimped to the core 91 that is located at the rear side of the substrate portion 11 that is behind the connection portion and that is exposed at the end of the electric wire 90 12 and an insulation barrel 13 which is positioned behind the board portion 11 behind the wire barrel 12 and is crimped to the insulating coating of the electric wire 90.

The board part 11 is formed over the entire length of the terminal fitting 10 while constituting the bottom part of the connection part, the wire barrel 12 and the insulation barrel 13, and has a support surface 14 for supporting the electric wire 90 along the front-rear direction. Yes.
The insulation barrel 13 has a pair of crimping pieces 15 protruding from both ends in the width direction of the substrate portion 11. The insulation barrel 13 is substantially U-shaped when viewed from the front by the base plate portion 11 and the two crimping pieces 15 rising in opposite directions in the direction orthogonal to the same axis from both ends in the width direction before crimping to the insulation coating. ing. Both the crimping pieces 15 are arranged so as to be displaced from each other in the front-rear direction, and are crimped in a state of overlapping the outer peripheral surface of the insulating coating in the front-rear direction.

  The wire barrel 12 has a barrel piece 21 that is caulked to the core wire 91 exposed at the end of the electric wire 90. The barrel piece 21 includes a pair of first barrel pieces 22 protruding in the direction perpendicular to the axis from both ends in the width direction of the substrate portion 11, and the first barrel pieces 22 from both ends in the width direction of the substrate portion 11, similarly to the above-described crimping piece 15. Consists of a pair of second barrel pieces 23 projecting in opposite directions orthogonal to the axis. The first barrel piece 22 and the second barrel piece 23 are configured with substantially the same amount of protrusion, and are substantially symmetrical with respect to the substrate portion 11. More specifically, the pair of first barrel pieces 22 are configured to rise from both ends in the width direction of the substrate portion 11 to the same side as the two crimping pieces 15, and the pair of second barrel pieces 23 are formed with the first barrel pieces 22. In the same front-rear position, the substrate part 11 is configured to fall from both ends in the width direction opposite to the rising direction of the two crimping pieces 15 so as to face each other, and the substrate part 11, both first barrel pieces 22 and both second barrels. By the piece 23, the wire barrel 12 is substantially H-shaped in front view before being crimped to the core wire 91.

  In the developed shape of the terminal fitting 10 shown in FIG. 1, both the second barrel pieces 23 are provided with a pair of tongues in the width direction surrounded by the cuts 26 by making a substantially H-shaped cut 26 (cut) in the substrate portion 11. The piece 27 is formed integrally by bending it in the direction opposite to the first barrel pieces 22. At this time, as shown in FIG. 2, a substantially square hole 29 is formed in the substrate portion 11 by cutting and raising the second barrel piece 23. The front-rear length of the first barrel piece 22 is longer than the front-rear length of both the crimping pieces 15, and the protruding amount of the first barrel piece 22 (the protruding amount of the second barrel piece 23 is also the same). It is shorter than the amount of protrusion.

Next, the operation of the terminal fitting 10 according to this embodiment will be described.
In caulking the wire barrel 12 to the core wire 91, first, the core wire 91 exposed at the end of the electric wire 90 is disposed between the first barrel piece 22 and the second barrel piece 23 in an open state, and the wire barrel 12 is placed in this state. 4 is set between the crimper 61 (upper mold) and the anvil 62 (lower mold) shown in FIG. The inner surface of the crimper 61 and the inner surface of the anvil 62 form a continuous arc shape and are concave surfaces 61A and 62A having the same shape.

  Subsequently, the crimper 61 and the anvil 62 are brought close to each other, and the wire barrel 12 is caulked between the concave surface 61A of the crimper 61 and the concave surface 62A of the anvil 62. At this time, substantially uniform compressive force is applied from both molds of the crimper 61 and the anvil 62 to both surfaces (upper surface both surfaces in the plate thickness direction) of the substrate portion 11, and the compressive force is unevenly distributed on either one side. Never do.

  When the wire barrel 12 is normally caulked in this manner, the pair of first barrel pieces 22 are wound around both sides in the width direction of the substantially upper half portion of the core wire 91 and the pair of second barrel pieces 23 are substantially lower half of the core wire 91. It is wound around both sides in the width direction of the part. In this state, the first barrel piece 22 and the second barrel piece 23 located on both sides in the width direction constitute a pair of halved portions 28 having a substantially C-shaped cross section. They are arranged symmetrically in the width direction with their tips facing each other.

  As described above, according to the present embodiment, the first barrel piece 22 and the second barrel piece 23 are configured to protrude from the base plate portion 11 in the opposite axis orthogonal directions. At the time of pressure bonding, the compressive force accompanying the bending operation of the first barrel piece 22 and the second barrel piece 23 is applied to both surfaces of the substrate portion 11. For this reason, it can avoid that tensile force acts on either one side of the board | substrate part 11, and generation | occurrence | production of the vent up of the terminal metal fitting 10 is prevented. In the case of this embodiment, an insulating oxide film made of aluminum oxide is easily formed on the surface of the core wire 91 due to the use of the electric wire 90 provided with the core wire 91 made of an aluminum strand. Since it is necessary to increase the crimping force of the wire barrel 12 to the core 91 in order to destroy the oxide film, the wire barrel 12 is divided into the first barrel piece 22 and the second barrel piece 23 as described above and vented up. It can be said that the significance of preventing the occurrence of this is great.

  In addition, since the first barrel piece 22 and the second barrel piece 23 are symmetrical to each other with the substrate portion 11 in between, a substantially equal compressive force is applied to both surfaces of the substrate portion 11, and vent-up is performed. Is more reliably prevented.

  Furthermore, before crimping to the core 91, the pair of first barrel pieces 22 and the pair of second barrel pieces 23 projecting from both ends of the substrate portion 11 are substantially H-shaped in front view. The wire barrel 12 has a substantially symmetrical shape in both the height direction and the width direction, and the balance of the bending operation of the first barrel piece 22 and the second barrel piece 23 becomes smooth. Moreover, the adhering force of the wire barrel 12 to the core wire 91 is also increased.

  Furthermore, the pair of tongue pieces 27 defined by the substantially H-shaped cuts 26 in which the second barrel pieces 23 are placed in the base plate portion 11 are bent in the direction opposite to the first barrel pieces 22. The wire barrel 12 having a substantially H-shape can be easily formed from a single metal plate.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The first barrel piece and the second barrel piece may have an asymmetric shape with the substrate portion interposed therebetween.
(2) The wire barrel may be substantially S-shaped or X-shaped when viewed from the front, with the pair of first barrel pieces and the pair of second barrel pieces protruding from the substrate portion before being crimped to the core wire. .
(3) The terminal fitting may be a male terminal fitting having a male tab at the connection portion.
(4) The electric wire may be a copper electric wire having a core wire made of a copper element wire made of copper or a copper alloy.

It is a principal part expanded view of the terminal metal fitting which concerns on Embodiment 1 of this invention. It is a principal part top view of a terminal metal fitting. It is AA sectional drawing of FIG. It is sectional drawing of the wire barrel in the terminal metal fitting taken out from the metal mold | die. It is a side view of the conventional terminal metal fitting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Terminal metal fitting 11 ... Board | substrate part 12 ... Wire barrel 13 ... Insulation barrel 22 ... 1st barrel piece 23 ... 2nd barrel piece 90 ... Electric wire 91 ... Core wire

Claims (4)

A board portion extending in the axial direction to support the electric wire, a barrel piece projecting from the board portion, and a wire barrel that is crimped to the core wire exposed at the end of the electric wire,
The barrel piece is composed of a first barrel piece and a second barrel piece that protrude from the substrate portion in opposite directions perpendicular to the axis.   The terminal fitting according to claim 1, wherein the first barrel piece and the second barrel piece are substantially symmetrical with each other with the substrate portion interposed therebetween.   The wire barrel has a substantially H-shape when viewed from the front by a pair of the first barrel pieces and a pair of the second barrel pieces protruding in opposite directions from both ends of the substrate portion before being crimped to the core wire. The terminal fitting according to claim 1 or 2.   4. The terminal fitting according to claim 3, wherein the second barrel piece is formed by bending a pair of tongue pieces defined by a substantially H-shaped cut in the substrate portion in a direction opposite to the first barrel piece. .

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