JP2021034201A - Wire with terminal and terminal fitting - Google Patents

Abstract

To provide a wire with terminal, capable of achieving both of a high formation accuracy of a cut-off body to the wire with terminal and a high productivity of the wire with terminal, and provide a terminal fitting used for the wire with terminal.SOLUTION: A wire with terminal 1 comprises: an electric wire 10; a terminal fitting 20 structured by a metal plate material and attached to the electric wire 10; and a cut-off body 60. The terminal fitting 20 includes: a barrel part 41 crimped to a conductive core wire 11 of the electric wire 10; and coupling parts 35 and 36 connected to the barrel part 41. The cut-off body 60 is formed through an arrangement and hardening of a cut-off material 60a having flowability, and is provided so as to separate an interval between end surfaces 35a, 41a, 41b, 36a, and 42a of the metal plate materials, structuring the barrel part 41 and the coupling parts 35 and 36 and the conductive core wire 11. The coupling parts 35 and 36 include a concave portion 48 structured so that a concave surface 49 in which one part of outer side surfaces of the coupling parts 35 and 36 is concaved toward an inner side of the terminal fitting 20 is connected to the end surfaces 35a and 36a of the coupling parts 35 and 36.SELECTED DRAWING: Figure 4

Description

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

In recent years, for example, in a wire harness distributed to a vehicle, a terminal fitting formed of copper or a copper alloy is attached to an electric wire having a conductor core wire formed of aluminum or an aluminum alloy (hereinafter referred to as "aluminum electric wire"). Wires with terminals may be used.

An electric wire with a terminal using an aluminum electric wire has advantages in terms of weight reduction of the electric wire itself, but it adheres between the conductor core wire and the terminal metal fitting due to the fact that the conductor core wire and the terminal metal fitting are different metals. There is a demerit in that galvanic corrosion (contact corrosion of dissimilar metals) may occur due to the generated water becoming an electrolytic solution. As is well known, galvanic corrosion occurs due to the difference in standard electrode potential between dissimilar metals.

Therefore, in one of the conventional electric wires with terminals using an aluminum electric wire, a seal member for stopping water is provided so as to isolate the conductor core wire crimped to the barrel portion of the terminal metal fitting from the outside. As a result, the above-mentioned galvanic corrosion is suppressed, and the reliability of the electrical connection between the terminal fitting and the conductor core wire is maintained for a long period of time (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2019-09026

In the above-mentioned conventional electric wire with a terminal, a seal member is formed by using an ultraviolet curable resin. Specifically, after the terminal fitting is crimped to the end of the electric wire, the liquid resin before curing is dropped so as to cover the conductor core wire exposed to the outside. Then, after sufficiently covering the conductor core wire and the terminal metal fittings (barrel portion, etc.) around it with the resin before curing, the resin is cured using ultraviolet rays to form a sealing member composed of the cured resin. It has become like.

However, as can be understood from the above description, in this conventional electric wire with a terminal, the accuracy of the shape and arrangement of the sealing member depends on the dropping amount and dropping position of the liquid resin. For example, if the amount of liquid resin dropped is too large, even if the dropping position is appropriate, the resin may wet and spread over a wider range than the design envisioned (so-called liquid dripping occurs). is there. Then, if the resin is cured without noticing the wet and spread resin, a seal member is formed at a place not assumed in the design of the electric wire with a terminal. A sealing member having such an unexpected shape can prevent, for example, inserting an electric wire with a terminal into a terminal accommodating chamber of a connector housing.

It is considered that the above-mentioned dripping can be suppressed by strictly controlling the dropping amount and dropping position of the liquid resin. However, if the required accuracy such as the amount of liquid resin dropped is excessively increased, there is a concern that the productivity of the electric wire with a terminal may decrease.

The present invention has been made in view of the above circumstances, and an object of the present invention is to obtain a terminal-equipped electric wire capable of achieving both high accuracy of forming a waterproof body on a terminal-attached electric wire and high productivity of the terminal-attached electric wire. An object of the present invention is to provide a terminal fitting that can be used for the electric wire with a terminal.

In order to achieve the above-mentioned object, the electric wire with a terminal and the terminal fitting according to the present invention are characterized by the following [1] to [3].
[1]
An electric wire with a terminal including an electric wire, a terminal metal fitting made of a metal plate material and attached to the electric wire, and a waterproof body.
The terminal fitting is
The barrel part that is crimped to the conductor core wire exposed from the insulation coating at the end of the electric wire, and
It has a connecting portion that is connected to the barrel portion and extends along the axial direction of the conductor core wire.
The waterproof body is
The end face of the metal plate material and the conductor core wire, which are made of the water-stopping material capable of forming the water-stopping body through the arrangement and hardening of the water-stopping material having fluidity and which constitute the barrel portion and the connecting portion. It is provided so as to separate between
The connecting part
A concave shape in which a part of the side surface of the connecting portion that constitutes the outer surface of the terminal fitting is recessed toward the inside of the terminal fitting so that the recessed surface is connected to the end surface of the connecting portion. Have a place,
Must be an electric wire with terminals.
[2]
In the electric wire with terminal described in [1] above,
The connecting part
The thickness of the metal plate material in the concave portion is thinner than the thickness of the metal plate material in the portion other than the concave portion.
Must be an electric wire with terminals.
[3]
A terminal fitting made of a metal plate and attached to an electric wire.
The barrel part that is crimped to the conductor core wire exposed from the insulation coating at the end of the electric wire, and
A connecting portion that is connected to the barrel portion and extends along the axial direction of the terminal fitting is provided.
The connecting part
A part of the side surface of the connecting portion that constitutes the outer surface of the terminal fitting is recessed toward the inside of the terminal fitting so that the recessed surface is connected to the end surface of the metal plate material that constitutes the connecting portion. Consists, has concave parts,
Must be a terminal bracket.

According to the electric wire with a terminal having the configuration of [1] above, a recessed surface in which a part of the side surface of the connecting portion extending from the barrel portion of the terminal fitting is recessed toward the inside of the terminal fitting is a metal plate material constituting the connecting portion. By connecting to the end face of the, a concave portion is formed in the connecting portion. Further, using a waterproof material that can be cured after being arranged in a fluid state (for example, an ultraviolet curable resin or a thermosetting resin), the end face of the metal plate material constituting the barrel portion and the connecting portion. A waterproof body is provided so as to separate the resin from the conductor core wire. Therefore, for example, when the water blocking material is dropped onto a terminal fitting or the like to form a water blocking body, even if the dropping amount of the water stopping material is slightly larger than the design value, the excess water stopping material flows into the concave portion. As a result, it is possible to prevent the water blocking material from getting wet and spreading to a range not expected in the design. Therefore, the water blocking body having the designed shape can be formed at the designed position without excessively increasing the accuracy of the dropping amount and the dropping position of the water blocking material.

Further, for example, when a metal plate material that has been plated is punched (pressed) to manufacture a terminal fitting, the base material of the metal plate material that is not covered with plating is exposed on the end faces of the barrel portion and the connecting portion. obtain. Even in such a case, the electric wire with a terminal of this configuration is designed to isolate the end faces of the barrel portion and the connecting portion from the conductor core wire by a waterproof body, so that the above-mentioned galvanic corrosion is appropriate. Can be suppressed.

Therefore, the terminal-equipped electric wire having this configuration has both high accuracy of forming the water-stopping body on the terminal-attached electric wire and high productivity of the terminal-attached electric wire while enhancing the original function of the waterproof body to suppress galvanic corrosion. It is possible.

According to the electric wire with a terminal having the configuration of the above [2], for example, a part of the connecting portion is thinned (for example, pressed by a manufacturing die to reduce the thickness) at the time of manufacturing the terminal fitting, so that the concave portion is formed. Is provided at the connecting portion. Therefore, the concave portion can be provided in the connecting portion without excessively complicating the manufacturing process of the terminal fitting.

According to the terminal fitting having the configuration of [3] above, a recessed surface in which a part of the side surface of the connecting portion extending from the barrel portion of the terminal fitting is recessed toward the inside of the terminal fitting is a metal plate material constituting the connecting portion. By connecting to the end face, a concave portion is formed in the connecting portion. Therefore, for example, when forming a waterproof body for corrosion protection by using a method of dropping an ultraviolet curable resin or a thermosetting resin, even if the amount of the resin dropped is slightly larger than the design value, it is excessive. By flowing the resin into the concave portion, it is possible to prevent the resin from getting wet and spreading to a range not expected in the design. Therefore, the water blocking body having the designed shape can be formed at the designed position without excessively increasing the accuracy of the dropping amount and the dropping position of the water blocking material. Further, by separating the end faces of the barrel portion and the connecting portion and the conductor core wire with a waterproof body, the above-mentioned galvanic corrosion can be appropriately suppressed. Therefore, the terminal fitting of this configuration can achieve both high accuracy of forming a waterproof body for suppressing galvanic corrosion and high productivity of an electric wire with a terminal using the terminal fitting.

As described above, according to the present invention, a terminal-equipped electric wire capable of achieving both high accuracy of forming a waterproof body on the terminal-equipped electric wire and high productivity of the terminal-attached electric wire, and a terminal that can be used for the terminal-attached electric wire. We can provide metal fittings.

The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through the embodiments described below with reference to the accompanying drawings.

FIG. 1 (a) is a perspective view of an electric wire with a terminal according to the first embodiment of the present invention before the waterproof body is provided, and FIG. 1 (b) is an enlarged view of part A of FIG. 1 (a). Is. 2 (a) is a cross-sectional view taken along the line BB of FIG. 1 (b), and FIG. 2 (b) is an enlarged view of a portion C of FIG. 2 (a). 3 (a) to 3 (c) show a side surface showing a process in which an ultraviolet curable liquid resin is dropped on the electric wire with a terminal shown in FIG. 1 to provide a waterproof body in a predetermined area of the electric wire with a terminal. It is a figure. FIG. 4 is a perspective view of an electric wire with a terminal according to the first embodiment of the present invention provided with a waterproof body. 5 (a) is a cross-sectional view taken along the line DD of FIG. 4, and FIG. 5 (b) is an enlarged view of a portion E of FIG. 5 (a). 6 (a) is a view corresponding to FIG. 1 (b) in the second embodiment, FIG. 6 (b) is a sectional view taken along line FF of FIG. 6 (a), and FIG. 6 (c) is a cross-sectional view taken along the line FF. Is an enlarged view of a part G in FIG. 6 (b). 7 (a) and 7 (b) are views corresponding to FIGS. 5 (a) and 5 (b) in the second embodiment shown in FIG. 6, respectively. 8 (a) and 8 (b) are diagrams corresponding to FIG. 1 (a) in the modified example, respectively.

<First Embodiment>
Hereinafter, the electric wire 1 with a terminal to which the terminal metal fitting 20 according to the first embodiment of the present invention is attached to the electric wire 10 will be described with reference to the drawings. Hereinafter, for convenience of explanation, in the axial direction (fitting direction) of the terminal fitting 20, the side on which the mating terminal (not shown) is fitted (the left side in FIGS. 1, 3, 4, and 8) is the tip side (the left side). The front side is used, and the opposite side (right side in FIGS. 1, 3, 4 and 8) is referred to as a base end side (rear side). Further, in FIGS. 1, 3, 4 and 8, the upper side and the lower side are referred to as an upper side and a lower side, respectively.

As shown in FIGS. 1 to 4, the terminal fitting 20 is crimped to the end of the electric wire 10, and the terminal fitting 20 and the conductor core wire 11 of the electric wire 10 are electrically connected. As shown in FIG. 4, a water blocking body 60 is provided at a predetermined position of the terminal fitting 20 to which the conductor core wire 11 of the electric wire 10 is connected. As a result, galvanic corrosion of the conductor core wire 11 is suppressed, and the reliability of the electrical connection between the terminal fitting 20 and the conductor core wire 11 can be maintained for a long period of time. The electric wire 1 with a terminal is formed by the electric wire 10, the terminal metal fitting 20, and the water blocking body 60. The electric wire 1 with a terminal constitutes, for example, a wire harness to be distributed to a vehicle such as an automobile.

The electric wire 10 is an insulated wire having a conductor core wire 11 and an insulating coating 12 made of a resin covering the conductor core wire 11. The conductor core wire 11 is made of aluminum or an aluminum alloy, and is made by twisting a plurality of strands. By forming the conductor core wire 11 of the electric wire 10 from aluminum or an aluminum alloy, the weight of the electric wire 1 with terminals is reduced, and the weight of the wire harness including the electric wire 1 with terminals is also reduced. The lightweight electric wire 1 with a terminal is particularly preferably used for a vehicle such as an electric vehicle or a hybrid vehicle in which a wire harness is frequently used.

The terminal fitting 20 is a conductor exposed from a contact portion 31 to be connected to a mating terminal (not shown) and an insulating coating 12 at the terminal of the electric wire 10 in order from the tip end side to the base end side in the axial direction. It has a first barrel portion 41 that is electrically connected to the core wire 11 and a second barrel portion 42 that is electrically connected to the insulating coating 12 at the end of the electric wire 10. The contact portion 31 and the first barrel portion 41 are connected to each other by the first connecting portion 35, and the first barrel portion 41 and the second barrel portion 42 are connected by the second connecting portion 36. In other words, the first connecting portion 35 and the second connecting portion 36 are connected to the first barrel portion 41 and extend along the axial direction of the conductor core wire 11.

The terminal fitting 20 is formed of a metal material different from the conductor core wire 11 made of aluminum or an aluminum alloy. Specifically, the terminal fitting 20 is formed by using a metal plate (plate-like body) made of copper, a copper alloy, or the like as a base material.

The terminal metal fitting 20 is formed by performing press working (punching and bending) on a metal plate (plate-shaped body). The entire surface (front and back surfaces and side surfaces) of the metal plate before being pressed is plated with tin (tin. Sn) or the like for the purpose of suppressing corrosion of the conductor core wire 11 of the electric wire 10 and improving corrosion resistance. It is preferable that the treatment is performed in advance. In this case, the end surface (processed surface) of the metal plate exposed by the press process after the press process is in a state where the base material (for example, copper) that has not been plated is exposed.

As shown in FIG. 1, the contact portion 31 is formed in a rectangular tubular shape with an open tip portion. A mating terminal (not shown) is inserted into the opening of the contact portion 31, and the contact portion 31 and the mating terminal are electrically connected.

The bottom wall (lower surface) 32 and the pair of side walls 33 forming the rectangular tubular contact portion 31 extend from the proximal end side end to the proximal end side of the contact portion 31. The bottom wall 32 and the pair of side walls 33 extending from the contact portion 31 to the proximal end side are, in order from the distal end side to the proximal end side in the axial direction, the entire first connecting portion 35 and the first barrel. It constitutes a part of the part 41, the whole of the second connecting part 36, and a part of the second barrel part 42. Regarding the pair of side walls 33, the upper end surface 35a of the portion constituting the first connecting portion 35, the distal end side end surface 41a and the proximal end side end surface 41b of the portion constituting the first barrel portion 41, and the portion constituting the second connecting portion 36. As described above, the base material of the terminal fitting 20 is exposed on the upper end surface 36a of the above and the end surface 42a on the tip end side of the portion constituting the second barrel portion 42.

As shown in FIG. 1, the first barrel portion 41 is crimped to the conductor core wire 11 exposed from the insulating coating 12 at the end of the electric wire 10 and electrically connected to the conductor core wire 11. For such crimping and connection, the first barrel portion 41 has a pair of crimping pieces 45 extending from the upper ends of the pair of side walls 33 and crimped to the conductor core wire 11.

As shown in FIG. 1, the second barrel portion 42 is crimped to the insulating coating 12 at the end of the electric wire 10. For such crimping, the second barrel portion 42 has crimping pieces 46, 47 extending from the upper ends of the pair of side walls 33 and crimping to the insulating coating 12.

A concave portion 48 recessed inward in the width direction is formed on a part of the outer surface (outer surface in the width direction) of the pair of side walls 33 of the first connecting portion 35, respectively. In this example, the concave portion 48 is located only in the proximal end side region of the side wall 33 of the first connecting portion 35 (see FIG. 1 and the like), and is adjacent to the distal end side end surface 41a of the first barrel portion 41. .. In this example, the bottom surface (recessed surface) of the concave portion 48 is a rectangular flat tapered surface 49 (flat surface) inclined in the vertical direction (vertical direction) in the direction of moving inward in the width direction toward the upper side. (See FIG. 2 (a)). As shown in FIG. 2B, the upper end edge 49a of the tapered surface 49 is connected to the upper end surface 35a of the first connecting portion 35.

In this example, the inner surface (inner side surface in the width direction) of the side wall 33 of the first connecting portion 35 corresponding to the concave portion 48 and the inner surface of the side wall 33 of the first connecting portion 35 corresponding to the portion other than the concave portion 48 (inner surface in the width direction). (Inner side surface in the width direction) and are flush with each other (constituting one plane parallel to the vertical direction). That is, as shown in FIG. 2B, the thickness of the side wall 33 of the first connecting portion 35 in the concave portion 48 is thinner than the thickness of the side wall 33 of the first connecting portion 35 in the portions other than the concave portion 48. There is.

In this example, the concave portion 48 is formed by performing a thickening process when the metal plate (plate-shaped body) is pressed for forming the terminal fitting 20. The action / effect of providing the concave portion 48 will be described later.

The upper surface of the bottom wall 32 extending from the contact portion 31 to the base end side of the terminal fitting 20 before crimping is referred to as a “mounting surface” on which the end portion of the electric wire 10 is arranged. That is, the electric wire 10 is located so that the conductor core wire 11 exposed from the insulating coating 12 is sandwiched between the pair of crimping pieces 45 and the insulating coating 12 is sandwiched between the crimping pieces 46 and 47. A pair of crimping pieces 45 and crimping pieces 46, 47 are crimped using a well-known crimping machine or the like in a state where the crimping pieces 45 are arranged on the mounting surface. As a result, the pair of crimping pieces 45 are crimped to the conductor core wire 11 of the electric wire 10, and the crimping pieces 46 and 47 are crimped to the insulating coating 12 of the electric wire 10. As a result, as shown in FIG. 1, an electric wire with a terminal before the waterproof body 60 is provided can be obtained.

In the example shown in FIG. 1, the pair of crimping pieces 45 are crimped to the conductor core wire 11 in a curved state so as to bite into the conductor core wire 11 in a state where the pair of extending ends are abutted against each other. .. Further, the terminal portion 11a of the conductor core wire 11 is located on the distal end side of the pair of crimping pieces 45 on the distal end side, and is exposed from the first barrel portion 41. The crimping pieces 46 and 47 are crimped to the insulating coating 12 in a curved state so that the extending ends of the crimping pieces 47 overlap (overlap) on the extending ends of the crimping pieces 46. It is crimped.

As shown in FIGS. 3 (a) to 3 (c), the water stop body 60 is provided by using the dropping device 50 with respect to a predetermined area of the electric wire with a terminal before the water stop body 60 is provided. In the water stop body 60, a water stop material having fluidity (in this example, an ultraviolet curable liquid resin 60a) is dropped and placed in a predetermined area, and then the water stop material is used by a predetermined method (this example). Then, it is composed by being cured by irradiation with ultraviolet rays).

Specifically, as shown in FIG. 3A, the liquid resin 60a is sequentially dropped while the dropping device 50 is reciprocated in the width direction and moved in the axial direction of the terminal fitting 20. As a result, the conductor core wire 11 in which the liquid resin 60a is exposed in the region S (see FIGS. 1A and 3A) surrounded by the first barrel portion 41, the second barrel portion 42, and the connecting portion 36. It is arranged so as to cover. The region S is located on the proximal end side of the first barrel portion 41 on the proximal end side end surface 41b, on the distal end side of the second barrel portion 42 on the distal end side end surface 42a, and on the second connecting portion 36. This is a region above the upper end surface 36a.

Further, the liquid resin 60a is formed by biting into the conductor core wire 11 while the extending ends of the pair of crimping pieces 45 of the first barrel portion 41 are brought into contact with each other (see also FIG. 1). It is arranged so as to fill in. Further, the liquid resin 60a is arranged so as to cover the end portion 11a of the conductor core wire 11 exposed on the tip end side of the first barrel portion 41. In addition, the liquid resin 60a includes the base end side portion of the upper end surface 35a of the first connecting portion 35, the entire tip end side end surface 41a of the first barrel portion 41, the entire base end side end surface 41b, and the second connecting portion 36. It is arranged so as to cover the entire upper end surface 36a of the second barrel portion 42 and the entire end surface 42a on the distal end side of the second barrel portion 42.

Here, as described above, the upper end surface 35a of the first connecting portion 35, the distal end side end surface 41a and the proximal end side end surface 41b of the first barrel portion 41, the upper end surface 36a of the second connecting portion 36, and the second barrel. The base material (Cu or the like) of the terminal fitting 20 is exposed on the end surface 42a on the tip end side of the portion 42. By arranging the resin 60a so as to cover these end faces of the terminal metal fittings 20 and then curing the resin 60a to form the waterproof body 60 as described later, the end faces and the conductor core wire 11 can be separated from each other. As a result, galvanic corrosion of the conductor core wire 11 can be suppressed.

Further, in the process of sequentially dropping the liquid resin 60a using the dropping device 50, even if a larger amount of the resin 60a than the design value is unintentionally dropped, as shown in FIG. 3C. , Excess resin 60a flows into the concave portion 48 (see also FIGS. 4 and 5). In the example shown in FIG. 5A, the excess resin 60a has flowed into both of the pair of concave portions 48. As a result, it is possible to prevent the water blocking body 60 from spreading beyond the predetermined region (a range not assumed in the design). Further, the water blocking body 60 formed inside the concave portion 48 also functions as a reinforcing material for the side wall 33. As a result, at least a part of the decrease in strength of the side wall 33 of the first connecting portion 35 due to the provision of the concave portion 48 can be compensated by the water blocking body 60.

After arranging the liquid resin 60a as described above, the liquid resin 60a is cured by using ultraviolet rays to stop the conductor core wire 11 and the above-mentioned end faces from being exposed to the outside as shown in FIG. An electric wire 1 with a terminal covered with a water body 60 can be obtained.

<Second Embodiment>
In the first embodiment, the bottom surface (recessed surface) of the concave portion 48 is a tapered surface 49. On the other hand, in the second embodiment of the present invention, as shown in FIGS. 6 and 7, the terminal fitting 20 is provided so that the bottom surface (recessed surface) of the concave portion 48 is a vertical surface 49 parallel to the vertical direction. Is configured. In the concave portion 48 shown in FIG. 6, the upper end edge 49a of the vertical plane 49 is connected to the upper end surface 35a of the first connecting portion 35.

In the examples shown in FIGS. 6 and 7, similarly to the first embodiment, the inner surface (inner side surface in the width direction) of the side wall 33 of the first connecting portion 35 corresponding to the concave portion 48 and the portion other than the concave portion 48 are supported. The inner surface (inner side surface in the width direction) of the side wall 33 of the first connecting portion 35 is flush with each other (constituting one plane parallel to the vertical direction). That is, as shown in FIG. 6C, the thickness of the side wall 33 of the first connecting portion 35 in the concave portion 48 is thinner than the thickness of the side wall 33 of the first connecting portion 35 in the portions other than the concave portion 48. There is. Similar to the first embodiment, the concave portion 48 is also formed by performing a thickening process when the metal plate (plate-shaped body) is pressed for forming the terminal fitting 20.

In the aspect shown in FIGS. 6 and 7, the upper end edge 49a of the vertical plane 49 is a steep corner portion. Therefore, as compared with the first embodiment (the bottom surface of the concave portion 48 is a tapered surface 49), the excess resin 60a is less likely to flow down into the concave portion 48 beyond the upper end edge 49a due to its own surface tension. .. On the other hand, even if the excess resin 60a flows down into the concave portion 48 beyond the upper end edge 49a, by allowing the resin 60a to flow into the concave portion 48, the resin reaches a range not expected in the design. It is possible to prevent the 60a from getting wet and spreading. Further, the resin located inside the concave portion 48 is unlikely to flow further downward beyond the lower end edge 48a (see FIGS. 6 (c) and 7 (b)) of the steep concave portion 48. Therefore, it is possible to surely suppress the spread of the resin 60a (hence, the water blocking body 60) to the outside of the predetermined region (the range not assumed in the design).

<Action / effect>
As described above, according to the electric wire 1 with a terminal according to the first embodiment and the second embodiment of the present invention, a part of the side surface of the first connecting portion 35 extending from the first barrel portion 41 of the terminal fitting 20 to the tip side is a terminal. A concave portion 48 is formed in the first connecting portion 35 by connecting the recessed surface (tapered surface 49) recessed toward the inside of the metal fitting 20 to the upper end surface 35a of the first connecting portion 35. Further, using a waterproof material (for example, an ultraviolet curable resin 60a) that can be cured after being arranged in a fluid state, the first and second barrel portions 41 and 42 and the first and second connecting portions are used. A water blocking body 60 is provided so as to isolate between the end faces of the metal plate members constituting 35 and 36 and the conductor core wire 11. When the water blocking material is dropped onto the terminal fitting 20 or the like to form the water blocking body 60, even if the dropping amount of the water stopping material 60a is slightly larger than the design value, the excess water stopping material 60a is applied to the concave portion 48. By flowing in, it is possible to prevent the water blocking material 60a from getting wet and spreading to a range not assumed in the design. Therefore, the water blocking body 60 having the designed shape can be formed at the designed position without excessively increasing the accuracy of the dropping amount and the dropping position of the water blocking material 60a.

Further, when the terminal metal fitting 20 is manufactured by punching (pressing) the plated metal plate material, the base material of the metal plate material not covered with plating can be exposed in the first and second barrel portions 41, By separating the end faces of the 42 and the first and second connecting portions 35 and 36 and the conductor core wire 11 with the waterproof body 60, the above-mentioned galvanic corrosion can be appropriately suppressed.

Therefore, the electric wire 1 with a terminal according to the first embodiment enhances the original function of the water stop body 60 for suppressing galvanic corrosion, and has high accuracy in forming the water stop body 60 on the electric wire 1 with a terminal and the electric wire with a terminal. It is possible to achieve both high productivity.

Further, according to the electric wire 1 with a terminal according to the first embodiment, a part of the first connecting portion 35 is thinned (for example, the thickness is reduced by pressing with a manufacturing die) at the time of manufacturing the terminal fitting. As a result, the concave portion 48 is provided in the first connecting portion 35. Therefore, the concave portion 48 can be provided in the first connecting portion 35 without excessively complicating the manufacturing process of the terminal fitting 20.

Further, according to the electric wire 1 with a terminal according to the first embodiment, the bottom surface (recessed surface) of the concave portion 48 is a tapered surface 49. Therefore, for example, in the mode in which the bottom surface of the concave portion 48 is a vertical surface hanging vertically from the upper end edge 49a (see FIG. 5B) of the tapered surface 49 (the mode shown in FIGS. 6 and 7 described later). The thickness of the side wall 33 of the first connecting portion 35 at the concave portion 48 is thicker than that of the concave portion 48. Therefore, it is possible to reduce the decrease in strength of the side wall 33 of the first connecting portion 35 due to the provision of the concave portion 48.

In addition, the excess resin 60a is cured in a state of flowing into the concave portion 48, so that a part of the water blocking body 60 is formed inside the concave portion 48. The water blocking body 60 formed inside the concave portion 48 can contribute to increasing the strength of the side wall 33 of the first connecting portion 35 in the concave portion 48. Thereby, the decrease in the strength of the side wall 33 of the first connecting portion 35 due to the provision of the concave portion 48 can be compensated.

<Other forms>
The present invention is not limited to each of the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

Further, in each of the above embodiments, the concave portion 48 is formed only in the first connecting portion 35. On the other hand, as shown in FIG. 8 (a), the concave portion 48 may be formed in both the first connecting portion 35 and the second connecting portion 36, or as shown in FIG. 8 (b). The concave portion 48 may be formed only in the second connecting portion 36.

Further, in the various aspects described above, the outer surface (outer surface in the width direction) of the side wall 33 corresponding to the concave portion 48 is recessed inward in the width direction, and the inner surface (inner side surface in the width direction) of the side wall 33 corresponding to the concave portion 48 is recessed. ) Is not raised inward in the width direction (is flush with the surrounding inner surface). These concave portions 48 are formed by subjecting the metal plate (plate-shaped body) to a thickening process. On the other hand, the outer surface (outer surface in the width direction) of the side wall 33 corresponding to the concave portion 48 is recessed inward in the width direction, and the inner surface (inner side surface in the width direction) of the side wall 33 corresponding to the concave portion 48 is recessed in the width direction. It may be raised inward. In this case, the concave portion 48 is formed by subjecting the metal plate (plate-like body) to so-called embossing.

Here, the features of the above-described embodiments of the electric wire 1 with terminals and the terminal fitting 20 according to the present invention are briefly summarized and listed below in [1] to [3], respectively.
[1]
An electric wire (1) with a terminal including an electric wire (10), a terminal metal fitting (20) made of a metal plate material and attached to the electric wire (10), and a water stop body (60).
The terminal fitting (20)
A barrel portion (41) crimped to a conductor core wire (11) exposed from the insulating coating (12) at the end of the electric wire (10), and a barrel portion (41).
It has a connecting portion (35, 36) connected to the barrel portion (41) and extending along the axial direction of the conductor core wire (11).
The waterproof body (60) is
The water-stopping material (60a) is composed of the water-stopping material (60a) capable of forming the water-stopping body (60) through the arrangement and curing of the water-stopping material (60a) having fluidity, and the barrel portion (41) and the connecting portion ( It is provided so as to isolate between the end faces (35a, 41a, 41b, 36a, 42a) of the metal plate material constituting 35, 36) and the conductor core wire (11).
The connecting portions (35, 36) are
The recessed surface (49) in which a part of the side surface of the connecting portion (35, 36) forming the outer surface of the terminal metal fitting (20) is recessed toward the inside of the terminal metal fitting (20) is the said. It has a concave portion (48) configured to be connected to the end faces (35a, 36a) of the metal plate material constituting the connecting portion (35, 36).
Electric wire with terminals (1).
[2]
In the electric wire with terminal (1) described in [1] above,
The connecting portions (35, 36) are
The thickness of the metal plate material at the concave portion (48) is thinner than the thickness of the metal plate material at a portion other than the concave portion (48).
Electric wire with terminals (1).
[3]
A terminal fitting (20) made of a metal plate and attached to an electric wire (10).
A barrel portion (41) crimped to a conductor core wire (11) exposed from the insulating coating (12) at the end of the electric wire (10), and a barrel portion (41).
A connecting portion (35, 36) connected to the barrel portion (41) and extending along the axial direction of the terminal fitting (20) is provided.
The connecting portions (35, 36) are
The recessed surface (49) in which a part of the side surface of the connecting portion (35, 36) forming the outer surface of the terminal fitting (20) is recessed toward the inside of the terminal fitting (20) is the said. It has a concave portion (48) configured to connect to the end faces (35a, 36a) of the connecting portion (35, 36).
Terminal bracket (20).

1 Electric wire with terminal 10 Electric wire 11 Conductor core wire 12 Insulation coating 20 Terminal metal fittings 35 1st connection part (connection part)
35a Upper end surface (end surface) of the first connecting portion
36 Second connecting part (connecting part)
36a Upper end surface (end surface) of the second connecting portion
41 1st barrel part 41a Tip side end face (end face) of the 1st barrel part
41b Base end side end face (end face) of the first barrel portion
42 2nd barrel part 42a Tip side end face (end face) of the 2nd barrel part
48 Concave part 49 Tapered surface, vertical surface (recessed surface)
60 Water-stopping body 60a Resin (water-stopping material)

Claims (3)

An electric wire with a terminal including an electric wire, a terminal metal fitting made of a metal plate material and attached to the electric wire, and a waterproof body.
The terminal fitting is
The barrel part that is crimped to the conductor core wire exposed from the insulation coating at the end of the electric wire, and
It has a connecting portion that is connected to the barrel portion and extends along the axial direction of the conductor core wire.
The waterproof body is
The end face of the metal plate material and the conductor core wire, which are made of the water-stopping material capable of forming the water-stopping body through the arrangement and hardening of the water-stopping material having fluidity and which constitute the barrel portion and the connecting portion. It is provided so as to separate between
The connecting part
A concave shape in which a part of the side surface of the connecting portion that constitutes the outer surface of the terminal fitting is recessed toward the inside of the terminal fitting so that the recessed surface is connected to the end surface of the connecting portion. Have a place,
Electric wire with terminals. In the electric wire with a terminal according to claim 1,
The connecting part
The thickness of the metal plate material in the concave portion is thinner than the thickness of the metal plate material in the portion other than the concave portion.
Electric wire with terminals. A terminal fitting made of a metal plate and attached to an electric wire.
The barrel part that is crimped to the conductor core wire exposed from the insulation coating at the end of the electric wire, and
A connecting portion that is connected to the barrel portion and extends along the axial direction of the terminal fitting is provided.
The connecting part
A part of the side surface of the connecting portion that constitutes the outer surface of the terminal fitting is recessed toward the inside of the terminal fitting so that the recessed surface is connected to the end surface of the metal plate material that constitutes the connecting portion. Constructed, with concave parts,
Terminal metal fittings.

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