JP2010062097A - Terminal metal fitting, and electric wire with terminal metal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique capable of both securing a mechanical strength of an electric wire with a terminal metal fitting, and reducing electric resistance between the electric wire and the terminal metal fitting, without changing remarkably a crimping height of the terminal metal fitting with respect to the electric wire in an electric wire extended direction. <P>SOLUTION: A female terminal metal fitting 12 includes a bottom plate 16 mounted thereon with an end part of the electric wire 11, a pair of barrels extended from both side parts of the bottom plate 16 and crimped winding onto the electric wire 11, and a connection part 18 extended from the bottom plate 16 and connected to a mating side terminal. The barrel has a contact face 22 contacting with the electric wire 11, an extended piece 20 formed extending outward in an extension direction of the electric wire 11, from an end edge positioned in an end part side of the electric wire 11, is folded back onto the contact face 22, in the barrel, and a tip of the extended piece 20 is formed into a tapered shape. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a terminal fitting and an electric wire with terminal fitting.

  2. Description of the Related Art Conventionally, an electric wire with a terminal fitting is known in which a barrel formed on a terminal fitting is crimped to a core wire exposed from the electric wire with a mold.

  When the oxide film is formed on the surface of the core wire, there is a concern that the electric resistance between the electric wire and the terminal fitting is increased. In order to reduce the electrical resistance, it is conceivable to reduce the height of the barrel (crimp height) after crimping. By reducing the crimping height, the barrel can be crimped to the core wire with a large pressure. As a result, it was expected that the oxide film formed on the surface of the core wire was torn and the new surface of the core wire was exposed, and the electric resistance was reduced by contacting the new surface with the terminal fitting.

  However, according to the above method, since the cross-sectional area of the core wire is greatly reduced, the mechanical strength, particularly the tensile strength against an impact load (more specifically, the strength with which the crimp terminal holds the electric wire) is lowered.

In order to solve the above problem, Patent Document 1 discloses a technique for forming a portion with a large crimping height and a small portion in a barrel. As a result, a portion with a large crimping height contributes to maintaining mechanical strength, and a portion with a small crimping height contributes to reducing electrical resistance.
Japanese Patent Laid-Open No. 2005-50736

  According to the above technique, there is a discontinuous step between a portion having a high crimping height and a portion having a small crimping height in the terminal fitting. When this level difference becomes large, damage such as cracks is likely to occur in the terminal fitting.

  The present invention has been completed on the basis of the circumstances as described above, ensuring the mechanical strength of the electric wire with the terminal fitting, without greatly changing the crimping height of the terminal fitting to the electric wire in the extending direction of the electric wire, It is an object of the present invention to provide a technique that makes it possible to reduce the electrical resistance between an electric wire and a terminal fitting.

The present invention is a terminal fitting, a bottom plate on which an end of an electric wire is placed, a pair of barrels that are laterally extended from both side portions of the bottom plate and are crimped to wrap around the electric wire, A connection portion extending from the bottom plate and connected to the mating terminal,
The barrel has a contact surface that comes into contact with the electric wire, and the barrel includes an extension piece formed to extend outward from the edge located on the end side of the electric wire in the extending direction of the electric wire. It is turned back to the contact surface, and the extended end of the extended piece has a tapered shape.

  Further, the present invention is an electric wire with a terminal fitting, comprising: an electric wire including a core wire; and a terminal fitting that is crimped to the core wire exposed from an end portion of the electric wire, and the terminal fitting includes the core wire mounted thereon. A bottom plate to be placed, a pair of barrels that are laterally extended from both side portions of the bottom plate and crimped so as to wrap around the core wire, and a connection portion that extends from the bottom plate and is connected to a counterpart terminal; The barrel has a contact surface in contact with the core wire, and the barrel extends from the end located on the end side of the electric wire to the outside in the direction in which the electric wire extends. The piece is folded back to the contact surface, and the extended end of the extended piece has a tapered shape.

  According to the present invention, even if there is no difference in the crimping height of the barrel, that is, even if a uniform crimping height is set in the extending direction of the electric wire, the extension piece formed on the barrel is simply folded. By this method, the barrel can be given a difference in compressibility before and after the extending direction of the electric wire. For this reason, the terminal fitting can be easily crimped without causing a large step in the barrel.

  Furthermore, according to the present invention, the extended end portion of the extended piece has a tapered shape. Thereby, a compression rate can be changed continuously. As a result, by rapidly reducing the compression rate, the core wire can be prevented from being cut when the barrel is crimped.

  The compression rate means the ratio of the cross-sectional area of the core wire after crimping to the cross-sectional area of the core wire before crimping. The case where the compression rate is small is the case where the pressure-bonding height is small, and the case where the core wire is compressed with a relatively large pressure. Further, the case where the compression rate is large is a case where the crimping height is large, and it means a case where the core wire is compressed with a relatively small pressure.

As embodiments of the present invention, the following embodiments are preferable.
The extending piece may have a triangular shape.

  According to said structure, the oxide film formed in the surface of a core wire is stripped off by the corner | angular part formed in the front-end | tip of the extension piece, and the new surface of a core wire is exposed. When the new surface of the core wire comes into contact with the barrel, the electrical resistance is further reduced.

  The extension piece may include a base portion that extends from the barrel and has a rectangular shape, and a tip portion that extends from the tip of the base portion and has a triangular shape.

  According to said structure, in the area | region corresponding to a base, a compression rate can be made comparatively large. And since the front-end | tip part extended from the base part has comprised the triangle shape, in the area | region corresponding to a front-end | tip part, a compression rate becomes small continuously. Thereby, since the area | region with a comparatively big compression rate can be formed, the electrical resistance between an electric wire and a terminal metal fitting can be reduced further.

  The core wire may be made of aluminum or an aluminum alloy.

  When the core wire is made of aluminum or an aluminum alloy, an oxide film is relatively easily formed on the surface of the core wire. The above configuration is effective when an oxide film is easily formed on the surface of the core wire.

  According to the present invention, the mechanical strength of the electric wire with the terminal fitting is ensured and the electrical resistance between the electric wire and the terminal fitting is reduced without greatly changing the crimping height of the terminal fitting with respect to the electric wire in the extending direction of the electric wire. Can be made compatible.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. The present embodiment is a terminal including an electric wire 11 including a core wire 10 and a female terminal fitting 12 (corresponding to a terminal fitting described in claims) that is crimped to the core wire 10 exposed from an end of the electric wire 11. It is the electric wire 13 with metal fittings.

(Wire 11)
As shown in FIG. 1, the electric wire 11 includes a core wire 10 formed by twisting a plurality of fine metal wires and an insulating coating 14 made of a synthetic resin that covers the outer periphery of the core wire 10. The core wire 10 can use arbitrary metals as needed, such as aluminum, aluminum alloy, copper, copper alloy. In this embodiment, aluminum or an aluminum alloy is used.

(Female terminal fitting 12)
The female terminal fitting 12 is formed by pressing a metal plate into a predetermined shape. As the metal plate material, any metal such as copper or copper alloy can be used as necessary. In this embodiment, copper or a copper alloy is used. Further, the metal plate material may be plated with an arbitrary metal such as tin or nickel. In this embodiment, tin plating is applied. As shown in FIG. 2, the female terminal fitting 12 is formed to be connected to a pair of insulation barrels 15 that are crimped so as to be wound from the outside of the insulating coating 14 of the electric wire 11, and the insulation barrel 15. A bottom plate 16 to be placed, a pair of wire barrels 17 (corresponding to the barrels described in claims) extending laterally from both sides of the bottom plate 16, and a male terminal fitting (not shown) extending from the bottom plate 16 And a connecting portion 18 connected to the counterpart terminal described in the claims.

  The connecting portion 18 has a rectangular tube shape, and a male terminal fitting can be inserted. An elastic contact piece 19 that is elastically deformable is formed inside the connecting portion 18, and the elastic contact piece 19 elastically contacts the male terminal fitting, whereby the male terminal fitting and the female terminal fitting 12 are electrically connected. Connected.

  As shown in FIG. 3, the wire barrel 17 has a substantially rectangular shape before being crimped to the core wire 10. The pair of wire barrels 17 has the same shape. Each wire barrel 17 has a direction in which the electric wire 11 extends (arrow A in FIG. 3) at an end of the electric wire 11 in a state where the female terminal fitting 12 is crimped to the electric wire 11 (left side in FIG. 3). The extending piece 20 extending outward is formed. The two extending pieces 20 have the same shape.

  As shown in FIG. 3, the extending piece 20 has a tapered shape as it extends from the boundary between the extending piece 20 and the wire barrel 17 toward the extending end of the extending piece 20. Specifically, the extending piece 20 has a triangular shape, and in detail, has an isosceles triangular shape. A corner 21 is formed at the tip of the extension piece 20. The length dimension of the extending piece 20 in the direction in which the electric wire 11 extends (the direction indicated by the arrow A in FIG. 3) is set to be shorter than the length dimension of the wire barrel 17 in the direction in which the electric wire 11 extends. In the present embodiment, the length dimension of the extension piece 20 in the extending direction of the electric wire 11 is set to approximately one third of the length dimension of the wire barrel 17.

  As shown in FIG. 3, a contact surface 22 that contacts the core wire 10 is formed on the bottom plate 16 and the wire barrel 17. On the contact surface 22 of the bottom plate 16 and the wire barrel 17, three recesses 23 extending in a direction orthogonal to the extending direction of the electric wire 11 (direction indicated by the arrow A in FIG. 3) are spaced in the extending direction of the electric wire 11. Are formed side by side. Of the recesses 23, the recess 23 located on the distal end side (left side in FIG. 3) of the electric wire 11 is set to have a shorter length in the direction perpendicular to the direction in which the electric wire 11 extends than the other recesses 23. .

  As shown in FIG. 2, the extension piece 20 is folded back to the contact surface 22 side of the wire barrel 17. On the recessed part 23 located in the front end side of the electric wire 11, it does not overlap with the extended piece 20 folded back. The extended piece 20 in the folded state is located in a region approximately one third from the end edge of the wire 11 in the wire barrel 17 on the front end side.

(Connection structure between the electric wire 11 and the female terminal fitting 12)
As shown in FIG. 1, in a state where the female terminal fitting 12 is crimped to the electric wire 11, the height dimension H (crimping height) of the wire barrel 17 after crimping is the direction in which the electric wire 11 extends (the arrow line in FIG. 1). (Direction indicated by A) is set substantially the same. “Substantially the same” includes the case where the crimping height is the same, and also includes the case where the crimping heights are close enough to be considered substantially the same even if the crimping heights are different.

  FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. As shown in FIG. 4, the pair of wire barrels 17 are crimped so as to be wound around the core wire 10. The edges of the pair of wire barrels 17 are in contact with each other at a position near the center in the width direction (left-right direction in FIG. 4) of the female terminal fitting 12 from the outside (upper in FIG. 4). It is in contact. In FIG. 4, the detailed structure of the core wire 10 is omitted. The same applies to FIGS. 5 and 6 below.

  By crimping so that the wire barrel 17 is wound around the outer side of the core wire 10, mechanical strength, particularly tensile strength against an impact load (more specifically, strength at which the crimp terminal holds the electric wire 11) is secured. It has become so.

  Pressure is applied to the core wire 10 from the wire barrel 17 by being crimped so that the wire barrel 17 is wound around the outside of the core wire 10. Then, the oxide film formed on the surface of the core wire 10 is broken to expose the new surface of the core wire 10, and the new surface and the contact surface 22 of the wire barrel 17 and the bottom plate 16 come into contact with each other. Are electrically connected.

  In addition, when the pressure is applied from the wire barrel 17, the core wire 10 is plastically deformed and enters the recess 23 formed in the contact surface 22 of the bottom plate 16 and the wire barrel 17. Then, the edge formed between the recess 23 and the contact surface 22 and the surface of the core wire 10 are in sliding contact with each other, whereby the oxide film of the core wire 10 is peeled off and the new surface of the core wire 10 is exposed. The new surface and the contact surface 22 of the wire barrel 17 and the bottom plate 16 come into contact with each other, so that the electrical connection between the electric wire 11 and the female terminal fitting 12 is ensured.

  FIG. 5 shows a cross-sectional view taken along line VV in FIG. As shown in FIG. 5, the folded extension piece 20 is positioned on the contact surface 22 side of the wire barrel 17. The crimping height with respect to the core wire 10 is substantially reduced by the thickness of the extended piece 20. Thereby, the pressure applied from the wire barrel 17 and the extension piece 20 with respect to the core wire 10 becomes large compared with the case where there is no extension piece 20 (refer FIG. 4). As a result, since the oxide film formed on the surface of the core wire 10 is easily broken, the electrical resistance between the electric wire 11 and the female terminal fitting 12 is reduced.

  FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 6 shows a cross-sectional view of the wire barrel 17 in the vicinity of the distal end side of the electric wire 11. As shown in FIG. 6, since the extending piece 20 has a tapered shape, the width dimension of the extending piece 20 in the left-right direction in FIG. 6 is the width dimension of the extending piece 20 shown in FIG. Is bigger than. Thereby, the pressure applied to the core wire 10 from the wire barrel 17 and the extending piece 20 is larger than that at the position shown in FIG. As a result, the electrical resistance between the electric wire 11 and the female terminal fitting 12 is even smaller.

  In addition, the newly formed surface of the core wire 10 made of aluminum or an aluminum alloy and the tin plating layer formed on the surface of the female terminal fitting 12 are slid in contact with pressure to form an alloy layer. Thereby, the electrical resistance of the electric wire 11 and the female terminal metal fitting 12 is still smaller.

  As described above, since the extending piece 20 has a tapered shape (in detail, a triangular shape), the pressure applied to the core wire 10 continuously changes in accordance with the shape of the extending piece 20. It has become.

  Then, an example of the manufacturing process of this embodiment is demonstrated. First, a metal plate material is press-formed into a predetermined shape. At this time, the recess 23 may be formed.

  Next, the connecting portion 18 is formed by bending the metal plate material. Further, the extending piece 20 is bent to the contact surface 22 side of the wire barrel 17. At this time, the recess 23 may be formed. Thereby, the female terminal fitting 12 is formed.

  The female terminal fitting 12 is placed on a lower mold (not shown). Subsequently, the insulation coating 14 located at the end of the electric wire 11 is peeled off to expose the core wire 10. The exposed core wire 10 is placed on the bottom plate 16 of the female terminal fitting 12.

  Thereafter, the upper mold (not shown) is moved toward the lower mold. Then, by being sandwiched between the upper mold and the lower side, the insulation barrel 15 is crimped so as to be wound around the outer side of the insulating coating 14 of the electric wire 11, and the wire barrel 17 is wound around the outer side of the core wire 10. So that it is crimped. Thereby, the electric wire 13 with a terminal metal fitting is completed.

  Then, the effect | action and effect of this embodiment are demonstrated. According to this embodiment, the contact surface 22 side of the wire barrel 17 is formed so as to protrude inward by the thickness of the extended piece 20 by folding the extended piece 20. . As a result, as shown in FIG. 1, even if the wire barrel 17 is crimped to the core wire 10 with a uniform crimping height H over the direction in which the electric wire 11 extends (the direction of the arrow A in FIG. 1), FIG. As shown in FIG. 6 and FIG. 6, in the region where the extended piece 20 is folded, the core wire 10 is compressed with a higher pressure than in the region where the extended piece 20 is not provided. For this reason, the compression rate (ratio of the cross-sectional area of the core wire 10 after crimping to the cross-sectional area of the core wire 10 before crimping) on the distal end side of the electric wire 11 is the root side of the electric wire 11 (opposite side of the distal end side of the electric wire 11). It is lower than the compression rate. Thereby, the crimping by the high compression in the front end side portion of the core wire 10 effectively reduces the electrical resistance between the core wire 10 and the wire barrel 17, while the terminal metal fitting is suppressed by the suppressed compression on the base side of the core wire 10. The tensile strength of the attached electric wire 13, more specifically, the holding strength of the core wire 10 by the wire barrel 17 can be ensured high. That is, it is possible to achieve both reduction in electrical resistance and securing high mechanical strength.

  Thus, it is possible to achieve both reduction in electrical resistance and securing of tensile strength without giving a large difference in the crimping height of the wire barrel 17, which brings the following advantages.

  For example, as in the prior art described in Patent Document 1, the crimping height of the front end portion of the wire barrel 17 (ie, the portion to be crimped to the tip end portion of the core wire 10) and the rear portion (ie, of the core wire 10). In order to achieve both reduction of electrical resistance and securing of tensile strength by providing a difference in the crimping height of the part to be crimped to the base side part), the difference in the crimping height must be considerably increased. Don't be. Such a difference in the crimping height causes a large step between the front portion and the rear portion of the wire barrel 17. Such a step is likely to cause a crack in the wire barrel 17. In particular, when the core wire 10 is made of aluminum or an aluminum alloy, in order to break the oxide film formed on the surface of the core wire 10 and reduce the electrical resistance, for example, the compression rate is required to be 40% to 70%. May be. In order to secure the mechanical strength under such a compression rate, the step may be very large.

  On the other hand, in this embodiment, even if it does not provide a difference in the crimping height, that is, even if the uniform crimping height H is set in the extending direction of the electric wire 11, the extension formed in the wire barrel 17. A simple technique of bending the piece 20 can give a difference in compression ratio before and after the wire barrel 17. For this reason, the female terminal fitting 12 can be easily crimped without causing a large step in the wire barrel 17.

  Further, in the present embodiment, the extending piece 20 has a shape that tapers from the boundary with the wire barrel 17 toward the tip of the extending piece 20. Thereby, a compression rate can be changed continuously. As a result, it is possible to suppress the core wire 10 from being cut when the wire barrel 17 is crimped by rapidly reducing the compression rate.

  In the present embodiment, the extending piece 20 has a triangular shape. For this reason, the oxide film formed on the surface of the core wire 10 is peeled off by the corner portion 21 formed at the tip of the extended piece 20, and the new surface of the core wire 10 is exposed. When the new surface of the core wire 10 is in contact with the bottom plate 16 or the wire barrel 17, the electrical resistance is further reduced.

  In the present embodiment, the core wire 10 is made of aluminum or an aluminum alloy. Thus, when the core wire 10 is made of aluminum or an aluminum alloy, an oxide film is relatively easily formed on the surface of the core wire 10. The present invention is effective when an oxide film is easily formed on the surface of the core wire 10.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 7, in this embodiment, the pair of wire barrels 17 are connected to the end of the end of the electric wire 11 (left side in FIG. 7) in a state where the female terminal fitting 12 is crimped to the electric wire 11. In the extending direction of the electric wire 11 (the direction indicated by the arrow A in FIG. 7), an extending piece 30 extending outward is formed. The two extending pieces 30 have the same shape.

  The extending piece 30 extends from the wire barrel 17 outward in the direction in which the electric wire 11 extends (left side in FIG. 7) to form a rectangular shape, and the electric wire 11 extends from the distal end of the base portion 31 (left end in FIG. 7). And a tip 32 having a triangular shape extending outward in the direction (leftward in FIG. 7). The tip 32 has an isosceles triangular shape.

  As shown in FIG. 7, a contact surface 22 that contacts the core wire 10 is formed on the bottom plate 16 and the wire barrel 17. On the contact surface 22 of the bottom plate 16 and the wire barrel 17, three concave portions 33 extending in a direction orthogonal to the extending direction of the electric wire 11 (direction indicated by the arrow A in FIG. 7) are spaced in the extending direction of the electric wire 11. Are formed side by side. Of the recesses 33, the recess 33 located on the base side of the electric wire 11 (right side in FIG. 3) is set to have a longer length in the direction orthogonal to the direction in which the electric wire 11 extends than the other recesses 33. .

  As shown in FIG. 8, the extension piece 30 is folded back to the contact surface 22 side of the wire barrel 17. On the concave portion 33, the folded extension piece 30 is not overlapped. The extended piece 30 in the folded state is positioned in a region approximately two thirds from the edge of the wire barrel 17 on the distal end side of the electric wire 11.

  As shown in FIG. 8, the region corresponding to the base portion 31 in the wire barrel 17 is a high compression region P having a relatively large compression rate as the base portion 31 protrudes inward. Moreover, the area | region corresponding to the front-end | tip part 32 is made into the transition area | region Q where a compression rate changes continuously. And the area | region different from the area | region where the extension piece 30 is located among the wire barrels 17 is made into the low compression area | region R with a comparatively small compression rate.

  Since the configuration other than the above is substantially the same as that of the first embodiment, the same members are denoted by the same reference numerals, and redundant description is omitted.

  According to the present embodiment, in the high compression region P corresponding to the base 31 in the wire barrel 17, the compression rate can be made relatively large. And since the front-end | tip part 32 extended from the base 31 has comprised triangular shape, in the transition area | region Q corresponding to the front-end | tip part 32, a compression rate can be made small continuously.

  Thus, according to this embodiment, since the high compression area | region P with a comparatively big compression rate can be formed, the electrical resistance between the electric wire 11 and the female terminal metal fitting 12 can be reduced reliably. Moreover, since the low compression area | region R with a comparatively small compression rate can be formed, mechanical strength can be maintained. Furthermore, since the transition region Q in which the compression rate continuously changes is formed between the high compression region P and the low compression region R, it is possible to suppress the occurrence of cracks or the like in the female terminal fitting 12.

<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) In the first embodiment, the extending piece 20 has an isosceles triangle shape, but is not limited thereto, and may be an arbitrary triangle shape different from the isosceles triangle shape, or may be a tapered shape. For example, it may be an arbitrary shape such as a quadrangular shape or a pentagonal shape. Moreover, the corner | angular part 21 does not need to be formed in the front-end | tip.
(2) In the first embodiment, the extension length dimension of the extension piece 20 is approximately one third of the wire barrel 17, but can be any dimension as necessary.
(3) In this embodiment, although the recessed part 23 was formed in the bottom plate 16 and the wire barrel 17, the recessed part 23 may be abbreviate | omitted. Further, the insulation barrel 15 may be omitted depending on the specification.
(4) In the present embodiment, each of the pair of wire barrels 17 is formed with the extension piece 20 having the same shape. However, the present invention is not limited to this, and the shape of the extension piece 20 is a wire barrel. 17 may be different. Moreover, it is good also as a structure by which the extension piece 20 is formed only in one wire barrel 17. FIG. Thereby, the balance between the electrical resistance between the electric wire 11 and the female terminal fitting 12 and the mechanical strength can be finely adjusted.
(5) In the present embodiment, the terminal fitting is the female terminal fitting 12 having the cylindrical connecting portion 18, but is not limited thereto, and may be a male terminal fitting having a male tab, or penetrating through a metal plate material. A so-called LA terminal in which a hole is formed may be used, and a terminal fitting having an arbitrary shape may be used as necessary.
(6) In the present embodiment, the electric wire 11 is a covered electric wire that covers the outer periphery of the core wire 10 with the insulating coating 14. Can be used. The core wire 10 may be a single core wire.

The side view which shows the electric wire with a terminal metal fitting which concerns on Embodiment 1 of this invention Perspective view showing female terminal fitting The principal part enlarged plan view which shows the female terminal metal fitting in the state before crimping to a core wire IV-IV line sectional view in FIG. VV sectional view in FIG. Sectional view taken along line VI-VI in FIG. The principal part enlarged plan view which shows the state before crimping | bonding to a core wire about the female terminal metal fitting which concerns on Embodiment 2 of this invention. Side view showing an electric wire with terminal fittings

Explanation of symbols

10 ... core wire 11 ... electric wire 12 ... female terminal fitting (terminal fitting)
13 ... Electric wire with terminal fittings 14 ... Insulation coating 16 ... Bottom plate 17 ... Wire barrel (barrel)
DESCRIPTION OF SYMBOLS 18 ... Connection part 20, 30 ... Extension piece 22 ... Contact surface 31 ... Base part 32 ... Tip part

Claims (7)

A bottom plate on which an end portion of the electric wire is placed, a pair of barrels that are laterally extended from both sides of the bottom plate and are crimped so as to wrap around the electric wire, and connected to a mating terminal extending from the bottom plate A connecting portion, and
The barrel has a contact surface that comes into contact with the electric wire, and the barrel includes an extension piece formed to extend outward from the edge located on the end side of the electric wire in the extending direction of the electric wire. A terminal fitting which is folded back to a contact surface, and an extending end portion of the extending piece has a tapered shape. The terminal fitting according to claim 1, wherein the extending piece has a triangular shape. The terminal fitting according to claim 1, wherein the extension piece includes a base portion that extends from the barrel and has a rectangular shape, and a tip portion that extends from the front end of the base portion and has a triangular shape. An electric wire including a core wire, and a terminal fitting that is crimped to the core wire exposed from an end of the electric wire,
The terminal fitting includes a bottom plate on which the core wire is placed, a pair of barrels that are laterally extended from both sides of the bottom plate and are crimped so as to wrap around the core wire, and a mating side that extends from the bottom plate. A connection portion connected to the terminal,
The barrel has a contact surface that comes into contact with the core wire, and the barrel has an extending piece formed to extend outward from the end edge located on the end side of the electric wire in the extending direction of the electric wire. An electric wire with a terminal fitting, which is folded back to a contact surface, and an extending end portion of the extending piece has a tapered shape. The electric wire with a terminal fitting according to claim 4, wherein the extending piece has a triangular shape. The said extension piece is an electric wire with a terminal metal fitting of Claim 4 which consists of the base part which extends from the said barrel and makes a rectangular shape, and the front-end | tip part extended from the front-end | tip of the said base part, and makes a triangle shape. The said core wire is an electric wire with a terminal metal fitting as described in any one of Claim 4 thru | or 6 which consists of aluminum or aluminum alloy.

Images