WO2010007843A1

WO2010007843A1 - Terminal fitting and electrical wire with terminal fitting

Info

Publication number: WO2010007843A1
Application number: PCT/JP2009/060469
Authority: WO
Inventors: 正明田端; 憲知岡村
Original assignee: 住友電装株式会社
Priority date: 2008-07-15
Filing date: 2009-06-08
Publication date: 2010-01-21
Also published as: JP5099225B2; JPWO2010007843A1

Abstract

The electrical performance is increased while guaranteeing the adhesive strength of core wires. A female terminal fitting (20) is provided with a pressure-bonded part (28) that is pressure-bonded such that it encircles the terminal of an exposed core wire (11) in an aluminum wire (10). A first concave part (30) that extends to be long and thin in a direction approximately perpendicular to the axial direction of the core wire (11), and a second concave part (40) that extends shorter than the first concave part (30) in a direction approximately perpendicular to the axial direction of the core wire (11), and that has multiple holes (41) arranged in a line at intervals in the same direction, are formed in a contact surface (28A) that envelops the terminal of the core wire (11) in the pressure-bonded part (28).

Description

Terminal fittings and wires with terminal fittings

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

Conventionally, what was described in patent document 1, for example as a terminal metal fitting connected to the terminal of an electric wire is known. This terminal fitting has a structure in which a crimping portion to be crimped so as to be held in the end of the exposed core wire in the covered electric wire is provided behind the connection portion connected to the counterpart conductor. Here, when an oxide film is formed on the surface of the core wire described above, the oxide film is interposed between the core wire and the crimping portion, resulting in an increase in contact resistance between the core wire and the crimping portion. There is concern.

Therefore, in the above-described conventional terminal fitting, an inner surface (contact surface with the core wire) of the crimping portion is formed with a recess (serration) having an elongated groove shape in a direction orthogonal to the axial direction of the core wire. With this structure, when the crimping portion is caulked to the core wire of the electric wire, the core wire is compressed and extended, and the oxide film formed on the surface of the core wire is broken and peeled off by the so-called edge of the opening edge of the recess, and the core wire The new surface and the inner surface of the crimping part come into contact. Thereby, the contact resistance between an electric wire and a terminal metal fitting can be made small, ie, an electrical performance can be improved.

JP-A-10-125362

However, when a metal such as aluminum, which is relatively easy to form an oxide film, is applied as the core wire material, it cannot be said that the oxide film can be sufficiently removed by the above method, and further improvement is desired. It was.

The present invention has been completed based on the above-described circumstances, and an object of the present invention is to improve electrical performance while securing the fixing force of the core wire.

The present invention provides a connection portion connected to a mating conductor, a crimp portion that is positioned behind the connection portion and is crimped so as to be held in the end of the core wire exposed to the covered electric wire, and the crimp portion A first recess formed on a contact surface that encloses a terminal end of the core wire and extending in a direction substantially orthogonal to the axial direction of the core wire; and a first recess formed on the contact surface and substantially orthogonal to the axial direction of the core wire. It has a feature in that it includes a second recess that has a plurality of holes that extend shorter than the recess and are arranged side by side at intervals in the same direction.

In the electric wire with terminal fitting of the present invention, the terminal fitting specified above is crimped to the end of the core wire in the covered electric wire in which the core wire is covered with the covering.

When the core wire is compressed as the crimp portion is caulked, the core wire extends in the radial direction in addition to extending in the axial direction. Here, since the so-called edge is present only along the opening edges before and after the groove in the elongated groove-shaped first recess, the oxide film can be broken by the edge in response to the axial extension of the core wire. The edge of the core wire in the radial direction does not work and the oxide film cannot be broken. On the other hand, in the second recess in which a plurality of holes are arranged at intervals, the entire circumference of the hole edge can function as an edge in each hole, and in addition to the axial extension of the core, the radial direction of the core As for the spread of the oxide film, the edge works and the oxide film is broken. In short, it can be said that the second concave portion in which a plurality of hole portions are arranged at intervals has a large edge length that can break the oxide film, that is, has an excellent ability to peel the oxide film.

On the other hand, when the core wire is compressed when the core wire is compressed, and the wire is pulled or bent after crimping, the core wire tends to move in the axial direction. The edges of the front and rear opening edges are hooked to restrict the movement of the core wire, that is, to increase the fixing force of the core wire.

In this case, since there are no front and rear edges in the second recess, at least in the region between the adjacent holes, there is a limit to the restriction of movement of the core wire in the axial direction, that is, the fixing force is limited. On the other hand, in the elongated groove-shaped first concave portion, the front and rear opening edges that function as edges continuously exist in the width direction (a direction substantially orthogonal to the axial direction of the core wire), and thus a wide range on the peripheral surface of the core wire Thus, the movement in the axial direction can be restricted, and the fixing force is increased accordingly.

In addition to the first concave portion having excellent core wire fixing strength, the present invention includes the second concave portion having excellent ability to peel off the oxide film and thus the contact resistance. Performance can be increased.

In addition, it is good also as following structures.

(1) The first recesses and the second recesses are alternately arranged with an interval in the axial direction of the core wire. According to this, improvement in electrical performance and fixing force can be realized in a well-balanced manner over a wide range in the length direction of the core wire.

(2) The first recesses and the second recesses are alternately arranged over at least four rows. According to this, an improvement in electrical performance and fixing force can be more reliably realized over a wide range in the length direction of the core wire.

(3) In adjacent rows of the second recesses, the holes are formed so as to be shifted from each other by a half pitch. If the second recesses are also aligned, the movement in the axial direction can be restricted over a wide range on the peripheral surface of the core wire.

(4) The first recesses and the second recesses are alternately arranged at intervals in the axial direction of the core wire.

(5) Two or more of the first recesses and the second recesses are arranged in pairs with a gap in the axial direction of the core wire.

(6) The hole edge of each hole part which comprises the said 2nd recessed part has comprised square shape, and at least one side of the hole edge is formed along the direction substantially orthogonal to the axial direction of the said core wire. In each hole constituting the second recess, at least one of the front and rear hole edges functions to restrict the axial movement of the core wire.

(7) Out of the hole edges of the hole, a side located on the end side of the core wire is formed along a direction substantially orthogonal to the axial direction of the core wire. Each hole part which comprises a 2nd recessed part restrict | limits that a core wire is pushed to the edge part side, ie, the front, and moves.

(8) Of the hole edges of the hole, a side located on the opposite side of the end of the core wire is formed along a direction substantially orthogonal to the axial direction of the core wire. Each hole part which comprises a 2nd recessed part regulates effectively that a core wire is pulled on the opposite side, ie, back, to an edge part, and moves.

(9) Out of the hole edges of the hole portion, both sides of the core wire opposite to the end portion are formed along a direction substantially orthogonal to the axial direction of the core wire. . Each hole part which comprises a 2nd recessed part can control both a core wire being pushed ahead and moving, and being pulled and moved back.

(10) The core wire of the covered electric wire is formed of a plurality of aluminum wires made of aluminum or an aluminum alloy. This is particularly useful for aluminum wires that can easily form oxide films.

According to the present invention, the electrical performance can be enhanced while securing the fixing force of the core wire.

The side view which shows the electric wire with a terminal metal fitting which concerns on Embodiment 1 of this invention Fig. 1 is an enlarged end sectional view taken along line II-II in Fig. 1. Perspective view of female terminal fitting The top view which shows the expansion | deployment state of the barrel formation part vicinity of a female terminal metal fitting The top view which shows the expansion | deployment state of the barrel formation part vicinity of the female terminal metal fitting which concerns on Embodiment 2. FIG. Partial enlarged view of FIG. The top view which shows the expansion | deployment state of the barrel formation part vicinity of the female terminal metal fitting which concerns on Embodiment 3. FIG.

10 ... Aluminum wire (covered wire)

11 ... Core wire

12 ... Aluminum wire

13 ... Insulation coating (coating)

20 ... Female terminal fitting (terminal fitting)

21 ... Connection part

22 ... Bottom plate

25 ... Wire barrel

25A ... barrel piece

28 ... Crimping part

28A ... contact surface

30 ... 1st recessed part

31A ... Front and rear opening edges (of the first recess 30)

40 ... second recess

41 ... hole

42A, 42B ... side of hole edge (of hole 41)

50 ... second recess

51 ... hole

52A, 52B ... side of hole edge (of hole 51)

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

<Embodiment 1>

A first embodiment of the present invention will be described with reference to FIGS.

In this embodiment, the case where it applies to the aluminum electric wire 10 is illustrated, and as shown in FIG. 1, the terminal metal fitting 20 (henceforth, female terminal metal fitting 20) is connected to the terminal of the aluminum electric wire 10. ing.

The aluminum electric wire 10 has a core wire 11 formed of a stranded wire formed by twisting a plurality of strands 12 (hereinafter referred to as aluminum strands 12) made of aluminum or an aluminum alloy, and the periphery of the core wire 11 is an insulating coating made of synthetic resin. 13 is a structure covered with 13.

The female terminal fitting 20 is formed by pressing a metal plate made of copper alloy or the like and having excellent electrical conductivity. As shown in FIG. 3, the female terminal fitting 20 is electrically connected to a mating male terminal fitting (not shown). The wire barrel 25 and the insulation barrel 26 are provided behind the terminal connecting portion 21 having a substantially rectangular tube shape connected to the.

An elastic contact piece 23 is provided inside the terminal connection portion 21 so as to be folded back from the front edge of the bottom plate 22, and the tab of the mating male terminal fitting described above is connected to the terminal connection portion 21 from the front. By inserting and elastically contacting the elastic contact piece 23, the male terminal fitting and the female terminal fitting 20 are electrically connected.

The wire barrel 25 is an open barrel type, and as shown in the developed shape of FIG. 4, a pair of wide barrel pieces 25 A project from the left and right side edges of the bottom plate 22, and the female terminal fitting 20 is completed. The pair of left and right barrel pieces 25A rise from the left and right side edges of the bottom plate 22 so as to face each other. The wire barrel 25 is caulked and crimped to the end of the core wire 11 of the aluminum electric wire 10 described above, and, for example, as shown in FIG. The outer periphery of the terminal is embraced from both the left and right sides so that it can be crimped into a so-called heart shape. Therefore, the wire barrel 25 and the bottom plate 22 correspond to the crimping portion 28 of the present invention. In FIG. 2, a cross section of the core wire 11 composed of a plurality of aluminum wires 12 is schematically shown as a whole.

The insulation barrel 26 is also of an open barrel type, and a pair of left and right barrel pieces 26A that are narrower and taller than the barrel pieces 25A on the wire barrel 25 side are similarly connected to each other from the left and right side edges of the bottom plate 22. It is formed so as to face each other. The insulation barrel 26 is caulked and crimped to the remaining end of the insulating coating 13 of the aluminum electric wire 10. For example, both ends of the barrel pieces 26 A overlap each protruding end and the end of the insulating coating 13. In this way, the outer periphery of the frame is embraced from both the left and right sides so that it can be caulked into a so-called overlap type.

Concave portions

30 and 40 are formed on the inner surface of the above-described crimp portion 28 in the female terminal fitting 20, that is, on the contact surface 28 A that contacts the outer periphery of the core wire 11 of the aluminum electric wire 10.

The crimping portion 28 is formed by projecting a pair of barrel pieces 25A from the left and right side edges of the bottom plate 22, and in the developed shape, as shown in FIG. It is formed in a substantially rectangular shape that is long in the direction). The direction of the center line X coincides with the axial direction of the core wire 11 of the aluminum electric wire 10 to be crimped to the crimp portion 28.

As the recesses formed on the contact surface 28 A of the crimping part 28, two types of first recesses 30 and second recesses 40 are provided.

The first concave portion 30 is formed in an elongated groove shape continuously extending along a direction orthogonal to the center line X (hereinafter referred to as a width direction of the crimping portion 28), and has a length over almost the entire width of the crimping portion 28. have. The groove width of the first recess 30 is about 10% of the length of the crimping portion 28 (the length in the center line X direction).

The second recess 40 has a shape in which a plurality of hole portions 41 are arranged in a line at predetermined intervals in the width direction of the crimping portion 28. That is, the first recess 30 is configured to continuously extend in the width direction of the crimping portion 28, whereas the second recess 40 is configured to extend intermittently in the width direction of the crimping portion 28 by the plurality of holes 41. Is done. Specifically, each hole 41 extends in the width direction of the crimping portion 28 shorter than the first recess 30 and is closed in a loop shape, and the length of one side is the groove width of the first recess 30 described above. It has a square shape comparable to Here, the twelve holes 41 shown in the figure have a posture in which the two opposite sides 42A are along the width direction of the crimping portion 28 (the other two opposite sides 42B are along the length direction of the crimping portion 28). Are arranged in a line at a predetermined interval with a dimension slightly shorter than the length of one

side

42A, 42B of the hole 41. The overall length of the second recess 40 is the same as the overall length of the first recess 30.

Three first recesses 30 and two second recesses 40 are provided, and the first recesses 30 and the second recesses 40 are along the center line X direction in almost the entire contact surface 28A of the crimping part 28. For example, the first recesses 30 are alternately arranged at a constant interval of about half the groove width. In the present embodiment, the second recess 40 is arranged on the front end side (left side in FIG. 4) of the crimping portion 28, but the first recess 30 may be conversely arranged.

The female terminal fitting 20 of the present embodiment has the above-described structure, and is connected to the end of the aluminum electric wire 10 as follows.

First, the end of the insulating coating 13 of the aluminum electric wire 10 is peeled off, and the end of the core wire 11 is exposed over a predetermined length. From this state, the female terminal fitting 20 is crimped and connected to the end of the aluminum electric wire 10 by the crimping device. Specifically, the crimping device is provided with an anvil and a crimper, and the core wire is connected to the wire barrel 25 of the female terminal fitting 20. The center of the exposed portion of the terminal 11 is set to the insulation barrel 26 in a state where the terminal of the remaining insulating coating 13 is disposed, and both the

barrels

25 and 26 are connected to the anvil and the crimper. It is clamped between them. As a result, the insulation barrel 26 is caulked in an overlap type with respect to the end of the insulation coating 13, and the wire barrel 25 is caulked in a heart shape with respect to the end of the core wire 11. Thus, the operation for connecting the female terminal fitting 20 to the end of the aluminum electric wire 10 is completed.

A plurality of the aluminum electric wires 10 with the female terminal fittings 20 formed as described above are gathered to form a harness. For example, the female terminal fittings 20 at the terminals of the aluminum electric wires 10 are accommodated in the female housing, so that a predetermined vehicle The female housing is fitted to the mating male housing, and the corresponding female terminal fitting 20 and the male terminal fitting are electrically connected to each other.

Here, the aluminum electric wire 10 has a circumstance that an oxide film is relatively easily formed on the surface of the core wire 11 when the outside air touches the surface.

When the wire barrel 25 is caulked in the above-described crimping process, the core wire 11 is compressed, the core wire 11 extends in the axial direction and expands in the radial direction, and the meat portion on the surface side is pushed into the

recesses

30 and 40. It is. Accordingly, the elongated groove-shaped first recess 30 receives the axial extension of the core wire 11, and the opening edges 31 A before and after the groove bite into the surface of the core wire 11 as edges to form an oxide film formed on the surface. Break.

Further, in the second concave portion 40 in which a plurality (twelve in the figure) of the hole portions 41 are arranged at intervals, in each hole portion 41, the four sides 42 A and 42 B of the hole edge can function as edges, and the axial direction of the core wire 11. In addition to the extension, the edge of the core wire 11 is expanded and the oxide film is broken.

As described above, the oxide film formed on the surface of the core wire 11 is peeled off to expose the new surface of the core wire 11, and the new surface and the contact surface 28 A of the crimp portion 28 come into contact with each other. Are electrically connected.

Here, it should be noted that in the second recess 40 in which the plurality of hole portions 41 are arranged at intervals, all of the four

sides

42A and 42B of the hole edge of each hole portion 41 function as edges capable of breaking the oxide film. In short, it can be said that the edge has a large length and is excellent in the ability to peel off the oxide film.

Compared with the case where all six of the six

recesses

30 and 40 are used as the first recesses 30 because the three second recesses 40 that are excellent in the ability to peel off the oxide film as described above are applied. In addition, the oxide film peeling ability and thus the ability to reduce contact resistance are excellent, and as a result, the electrical performance can be enhanced.

On the other hand, when the harness is pulled or bent in the state of being mounted as a harness, the aluminum electric wire 10, that is, the core wire 11 tends to move in the axial direction. At this time, the

recesses

30 and 40 function to restrict the movement of the core wire 11, i.e., to increase the fixing force of the core wire 11, particularly when the front and rear opening edges are hooked to the surface of the core wire 11.

Here, in the second concave portion 40 in which the plurality of hole portions 41 are arranged at intervals, there are no front and rear edges in at least the region between the adjacent hole portions 41. There are limits to the restrictions on movement. On the other hand, in the elongated groove-shaped first recess 30, the front and rear opening edges 31 A that function as edges continuously exist over substantially the entire width of the crimping portion 28, so that the circumferential direction of the surface of the core wire 11 is The movement in the axial direction can be restricted over a wide range, and the fixing force can be increased accordingly.

Thus, among the six

recesses

30 and 40, the three first recesses 30 having excellent fixing force are applied in half, so that compared to the case where all the six recesses are the second recesses 40, the total fixed Wearing power can be high.

That is, according to the present embodiment, in addition to the first concave portion 30 excellent in the fixing strength of the core wire 11, the second concave portion 40 excellent in the ability to peel the oxide film and hence the contact resistance is provided. The electrical performance can be enhanced while securing the fixing force. Moreover, since the first recesses 30 and the second recesses 40 are alternately arranged in the axial direction of the core wire 11, the electrical performance and the fixing force can be improved over a wide range in the length direction of the core wire 11. Can be realized in a well-balanced manner.

<Embodiment 2>

Next, a second embodiment of the present invention will be described with reference to FIGS.

In the second embodiment, the first concave portion 30 having a long and narrow groove shape in the width direction of the crimping portion 28 with respect to the contact surface 28A of the crimping portion 28 of the female terminal fitting 20 and the width of the crimping portion 28 are formed. The second recesses 50 arranged in a line at a predetermined interval in the direction are arranged alternately at a certain interval along the center line direction of the crimping portion 28, in three points. As in the first embodiment, the second recess 50 is changed.

First, the shape of the hole 51 constituting the second recess 50 is a parallelogram. The holes 51 are arranged in a line at a predetermined interval in a posture in which one pair of two sides 52 A facing each other is along the width direction of the crimping portion 28. Accordingly, the opposite two sides 52B of the other set take an oblique posture.

More specifically, the length L of the front edge (rear edge) side 52A in the parallelogram is substantially equal to the groove width of the first concave portion 30, and the interval W between the front and rear sides 52A is also equal to that of the first concave portion 30. It is set approximately equal to the groove width. The smaller diagonal x of the parallelogram is about 60 degrees. Furthermore, the interval S between the adjacent hole portions 51 is about half of the length L of the side 52A of the front edge (rear edge) described above.

Moreover, in the row | line | column of the adjacent 2nd recessed part 50, each hole 51 is formed in the form mutually shifted by a half pitch.

Each of the second recesses 50 is formed with at least twelve holes 51 that form a perfect parallelogram, and each of the second recesses 50 has the same length as that of the first recess 30. Has been.

It can be said that the 2nd recessed part 50 of Embodiment 2 can also take the length of the edge which consists of the opening edge of each hole 51 large, and is excellent in the capability to peel an oxide film. And in addition to the 1st recessed part 30 excellent in the adhesivity of the core wire 11, in addition to having provided the 2nd recessed part 50 excellent in the ability to peel an oxide film by extension, and a contact resistance in this way, a core wire similarly The electrical performance can be improved while securing the fixing force 11.

Further, in the adjacent rows of the second concave portions 50, the respective hole portions 51 are formed so as to be shifted from each other by a half pitch, so that the front side of the hole portions 51 constituting the second concave portion 50 in one row ( The rear side 52A overlaps the front side (rear side) side 52A of the hole 51 constituting the second recess 50 in the adjacent row in the width direction (circumferential direction when crimped). As for the second recess 50, the movement in the axial direction can be restricted over a wide range on the peripheral surface of the core wire 11 by combining two adjacent rows. That is, the fixing force is further enhanced.

<Embodiment 3>

FIG. 7 shows Embodiment 3 of the present invention. This Embodiment 3 has shown another aspect in the case of forming a recessed part in the contact surface 28A of the crimping | compression-bonding part 28. FIG.

In the third embodiment, the first concave portion 30 having an elongated groove shape in the width direction of the crimping portion 28 illustrated in the first embodiment and a plurality of square hole portions 41 with respect to the contact surface 28A of the crimping portion 28 are the crimping portions. The second concave portions 40 arranged in a line at a predetermined interval in the width direction of the 28 are arranged in pairs, and each of the two concave portions 40 is alternately arranged twice along the center line direction of the crimping portion 28. It has become a form.

Even in the third embodiment, in addition to the first concave portion 30 excellent in the fixing strength of the core wire 11, the second concave portion 40 excellent in the ability to peel the oxide film and hence the contact resistance is provided. It is possible to improve the electrical performance while securing the fixing force, and to improve the electrical performance and the fixing force in a well-balanced manner over a wide range in the length direction of the core wire 11.

<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 recess and the second recess may be provided only on the contact surface.

(2) The first recess and the second recess may be formed in three rows or less.

(3) In Embodiment 1, it is preferable that the 1st recessed part 30 and the 2nd recessed part 40 are formed over at least 4 rows or more.

(4) In the first embodiment, even when the adjacent second recesses 40 are formed in such a manner that the holes 41 are shifted from each other by a half pitch, that is, the holes 41 in the front and back overlap each other. Good.

(5) In Embodiment 2, it is preferable that the 1st recessed part 30 and the 2nd recessed part 50 are formed over 4 rows or more.

(6) In the second embodiment, each second recess 50 may be formed in a form in which the pitch is not shifted as in the first embodiment, that is, in a form in which the front and rear hole parts 51 do not overlap each other.

(7) The shape of the hole constituting the second recess is not limited to the square or the parallelogram illustrated in the above embodiment, but a rectangle, a trapezoid, a rhombus, or a quadrangle that does not have sides parallel to each other is necessary. Depending on the situation, it can be an arbitrary square shape.

(8) In the above embodiment, the case where the wire barrel provided on the female terminal fitting is caulked into a heart shape that embraces the outer periphery of the end of the core wire from both the left and right sides while the both barrel pieces abut each projecting end. However, in addition to this, for example, both barrel pieces may be caulked in a so-called overlap type in which the outer ends of the ends of the core wires are held from both the left and right sides while overlapping their protruding ends.

(9) In the above embodiment, the female terminal fitting is exemplified as the terminal fitting to be connected to the terminal of the aluminum electric wire, but other terminals such as a male terminal fitting having a male tab or an LA terminal having an eyeball-shaped connecting portion. It may be a metal fitting.

(10) The present invention can be applied to other electric wires such as copper electric wires in addition to the aluminum electric wires exemplified in the above embodiment.

Claims

A connection part connected to the mating conductor;

A crimping part that is located behind the connection part and is crimped so as to be held in the end of the core wire exposed to the covered electric wire;

A first recess that is formed on a contact surface that wraps the end of the core wire in the crimping portion and extends in a direction substantially orthogonal to the axial direction of the core wire;

A second recess formed on the contact surface, extending in a direction substantially perpendicular to the axial direction of the core wire and shorter than the first recess, and having a plurality of holes arranged in the same direction at intervals. A terminal fitting characterized by comprising.
The terminal fitting according to claim 1, wherein the first recess and the second recess are alternately arranged with an interval in the axial direction of the core wire.
The terminal fitting according to claim 2, wherein the first recesses and the second recesses are alternately arranged over at least four rows.
4. The terminal fitting according to claim 3, wherein in the adjacent rows of the second concave portions, the respective hole portions are formed so as to be shifted from each other by a half pitch.
5. The terminal fitting according to claim 3, wherein the first recess and the second recess are alternately arranged one by one at intervals in the axial direction of the core wire.
The said 1st recessed part and the said 2nd recessed part are arrange | positioned alternately with the space | interval in the axial direction of the said core wire by making 2 sets or more respectively into 1 set. Terminal fittings.
The hole edge of each hole part which comprises the said 2nd recessed part comprises square shape, and at least one side of the hole edge is formed along the direction substantially orthogonal to the axial direction of the said core wire. Item 7. The terminal fitting according to any one of Items 1 to 6.
8. The terminal fitting according to claim 7, wherein, of the hole edges of the hole portion, a side located on an end side of the core wire is formed along a direction substantially orthogonal to the axial direction of the core wire. .
The side of the hole edge of the hole that is located on the opposite side of the end of the core wire is formed along a direction substantially orthogonal to the axial direction of the core wire. Terminal fitting.
Of the hole edge of the hole, both sides of the core wire on the opposite side of the end portion side are formed along a direction substantially orthogonal to the axial direction of the core wire. The terminal fitting according to claim 7.
11. An electric wire with terminal fitting, wherein the terminal fitting according to any one of claims 1 to 10 is crimped to an end of the core wire in a covered electric wire having a core wire covered with a coating.
12. The electric wire with terminal fitting according to claim 11, wherein the core wire of the covered electric wire is formed of a plurality of aluminum wires made of aluminum or an aluminum alloy.