JP2020187894A - Terminal-equipped wire and terminal fitting - Google Patents

Abstract

To provide a terminal-equipped wire that can achieve both high accuracy of forming a waterproof body on the terminal-equipped wire and high productivity of the terminal-equipped wire, and a terminal fitting that can be used for the terminal-equipped wire.SOLUTION: A terminal-equipped wire 1 includes an electric wire 10, a terminal fitting 20 attached to electric wire 10, and a water stop 60. The water stop 60 is made of a water stop material capable of forming the water stop 60 through the arrangement and hardening of the water stop material having fluidity, and is provided so as to cover a connection portion between the terminal fitting 20 and a conductor core wire 11. At least one of a first barrel portion 41 and a second barrel portion 42 includes a damming structure 48, 49 that regulates a flow range of the water stop material on the outer surface that faces the outside when the terminal fitting 20 is attached to the electric wire 10.SELECTED DRAWING: Figure 3

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 the generated water becomes an electrolytic solution and galvanic corrosion (contact corrosion of dissimilar metals) may occur. 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 conventional electric wire with a terminal described above, 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 the conductor core wire and the terminal metal fittings (barrel portion, etc.) around it are sufficiently covered 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 terminals 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 water blocking 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 [4].
[1]
An electric wire with a terminal including an electric wire, a terminal fitting attached to the electric wire, and a waterproof body.
The terminal fitting
The first barrel portion that is crimped to the conductor core wire that is exposed to the outside of the insulation coating at the end of the electric wire, and
It has a second barrel portion that is crimped to the insulating coating at the terminal of the electric wire.
The waterproof body is
It is composed of the water-stopping material capable of forming the water-stopping body through the arrangement and curing of the water-stopping material having fluidity, and is provided so as to cover the connecting portion between the terminal fitting and the conductor core wire.
At least one of the first barrel portion and the second barrel portion
The outer surface that faces the outside when the terminal fitting is attached to the electric wire has a damming structure that regulates the flow range of the water blocking material.
Must be an electric wire with terminals.
[2]
In the electric wire with terminal described in [1] above,
The first barrel portion is
It has a mounting portion on which the conductor core wire is placed and a pair of crimping pieces extending from the previously described mounting portion, and the pair of crimping pieces are curved so as to surround the conductor core wire and the pair of crimping pieces. Since the extending end of the crimping piece has a crimping shape that bites into the conductor core wire, a groove-shaped portion is defined at a position where the outer surfaces of the pair of crimping pieces face each other.
The waterproof body is
It is provided so as to fill the groove of the groove-shaped portion.
The pair of crimping pieces
The damming structure is provided on the outer surface of the pair of crimping pieces to be located outside the groove of the groove-shaped portion.
Must be an electric wire with terminals.
[3]
In the electric wire with a terminal according to the above [1] or the above [2],
The damming structure
A groove extending from one end side edge portion of the first barrel portion to the other end side edge portion and a groove extending from one end side edge portion of the second barrel portion to the other end side edge portion in the axial direction of the terminal fitting. At least one of
The waterproof body is
In at least part of the groove,
Must be an electric wire with terminals.
[4]
A terminal fitting that can be attached to an electric wire together with a waterproof body.
The first barrel portion crimped to the conductor core wire exposed to the outside of the insulating coating at the end of the electric wire, and
A second barrel portion that is crimped to the insulating coating at the terminal of the electric wire is provided.
At least one of the first barrel portion and the second barrel portion
The outer surface that faces the outside when the terminal fitting is attached to the electric wire has a damming structure that regulates the flow range of the water blocking material having fluidity for forming the water blocking body.
Must be a terminal bracket.

According to the electric wire with a terminal having the configuration of the above [1], a damming structure for regulating the flow range of the water blocking material is provided on the outer surface of at least one of the first barrel portion and the second barrel portion of the terminal fitting. Further, a waterproof material that can be cured after being arranged in a fluid state (for example, an ultraviolet curable resin or a thermosetting resin) is used to cover the connection portion between the terminal fitting and the conductor core wire. Is provided with a waterproof body. Therefore, for example, when the waterproof material is dropped onto a terminal fitting or the like to form a waterproof body, the amount of the waterproof material dropped is slightly larger than the design value, and the outer surface of the first barrel portion or the second barrel portion is formed. Even if the water blocking material flows out, the flow range of the excess water stopping material is regulated by the damming structure, so that the water blocking material can be prevented from 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. Therefore, the terminal-equipped electric wire having this configuration can achieve both high accuracy of forming a waterproof body on the terminal-equipped electric wire and high productivity of the terminal-equipped electric wire.

According to the electric wire with a terminal having the configuration of [2] above, since the first barrel portion has a specific crimping shape, a groove is formed at a position where the outer surfaces of the pair of crimping pieces constituting the first barrel portion face each other. The shape is defined. Then, a waterproof body is provided so as to fill the groove of the groove-shaped portion. Further, a damming structure is provided on the outer surface of the pair of crimping pieces located outside the groove of the groove-shaped portion. Therefore, in particular, by closing the groove-shaped portion where water tends to collect when the electric wire with a terminal is flooded with a water blocking body, the above-mentioned galvanic corrosion can be suppressed more appropriately. Further, when the water blocking material having fluidity is arranged so as to close the groove-shaped portion, even if the water blocking material flows out of the groove, the flow range of the water blocking material is regulated by the damming structure. Therefore, the terminal-equipped electric wire having this configuration can more reliably suppress galvanic corrosion without impairing the high accuracy of forming the waterproof body on the terminal-equipped electric wire and the high productivity of the terminal-equipped electric wire.

According to the electric wire with a terminal having the configuration of the above [3], a groove is used as a specific example of the damming structure. This groove is provided so as to extend from one end side edge portion of the first barrel portion and the second barrel portion to the other end side edge portion. Therefore, the flow range of the water blocking material can be appropriately regulated at any position in the axial direction of the first barrel portion and the second barrel portion. Further, by arranging the water blocking material to such an extent that the water blocking body enters at least a part of the groove (for example, dropping), the conductor core wire can be covered with a necessary and sufficient gap from the viewpoint of corrosion protection.

According to the terminal fitting having the configuration of [4] above, a dam on the outer surface of at least one of the first barrel portion and the second barrel portion of the terminal fitting regulates the flow range of the water blocking material for forming the water blocking body. A stop structure is provided. Therefore, for example, when forming a waterproof body for anticorrosion by using a method of dropping an ultraviolet curable resin or a thermosetting resin, the amount of the resin dropped is slightly larger than the design value, and the first barrel portion. Even if the water blocking material flows out to the outer surface of the second barrel, the water blocking material gets wet to a range not expected by design because the flow range of the excess water blocking material is regulated by the damming structure. It can be suppressed from spreading. Therefore, a water stop body having the shape as designed can be formed at the position as designed without excessively increasing the accuracy of the dropping amount and the dropping position of the resin. 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 water stop 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 for carrying out the invention described below with reference to the accompanying drawings.

FIG. 1A is a perspective view of an electric wire with a terminal according to an embodiment of the present invention before the waterproof body is provided, and FIG. 1B is a top view thereof. 2 (a) to 2 (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. 3 is a perspective view of an electric wire with a terminal according to an embodiment of the present invention provided with a waterproof body. FIG. 4 is a cross-sectional view taken along the line AA of FIG.

<Embodiment>
Hereinafter, the electric wire 1 with a terminal to which the terminal metal fitting 20 according to the 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 (left side in FIGS. 1, 2 and 3) to which the mating terminal (not shown) is fitted is the tip side (front side). The opposite side (right side in FIGS. 1, 2 and 3) is referred to as a base end side (rear side). Further, in FIGS. 1, 2 and 3, 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 3, 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. 3, a waterproof 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 composed of the electric wire 10, the terminal metal fitting 20, and the water stop body 60. The electric wire 1 with terminals constitutes, for example, a wire harness that is 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 the insulating coating 12 at the terminal of the contact portion 31 and the electric wire 10 which are connected to the mating terminal (not shown) 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 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.

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 or a copper alloy 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 constituting 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 front end side end surface 41a and the rear 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 tip end surface 42a 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. 4, the pair of crimping pieces 45 are curved so as to surround the conductor core wire 11 and have a crimping shape in which the extending ends of the pair of crimping pieces 45 bite into the conductor core wire 11. A groove-shaped portion 45a is defined at a position where the outer surfaces of the crimping pieces 45 face each other.

Each crimping piece 45 of the first barrel portion 41 is formed with a groove 48 recessed in the thickness direction on the outer surface that is exposed to the outside when the terminal fitting 20 is attached to the electric wire 10. .. More specifically, as shown in FIG. 4, the groove 48 is the outer surface of the crimping piece 45 that will be located outside the groove of the groove-shaped portion 45a (for example, as in this example, the crimping piece 45. It is provided on the outer surface in the proximal end side region Y of the crimping piece 45 with respect to the uppermost portion P of the above. As shown in FIG. 1, the groove 48 extends from one side edge portion (tip end side edge portion) to the other side edge portion (base end side edge portion) of the crimping piece 45 in the axial direction of the terminal fitting 20. Therefore, it extends continuously in a zigzag shape while changing the inclination direction alternately upward and downward. In this example, both side edges of the groove 48 are opened so as to be inclined upward in the axial direction of the terminal fitting 20. The action / effect due to the formation of the groove 48 will be described later.

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.

Each of the crimping pieces 46 and 47 of the second barrel portion 42 has a groove-shaped groove 49 recessed in the thickness direction on the outer surface that is exposed to the outside when the terminal fitting 20 is attached to the electric wire 10. Is formed. Similar to the groove 48, the groove 49 also has the terminal fitting 20 on the outer surface in the proximal end region of each of the crimping pieces 46 and 47 rather than the uppermost portion of each of the crimping pieces 46 and 47, as shown in FIG. In the axial direction of, from the tip side edge to the base end side edge, it extends continuously in a zigzag shape while alternately changing the inclination direction upward and downward. In this example, similarly to the groove 48, both side edges of the groove 49 are opened so as to be inclined upward in the axial direction of the terminal fitting 20. The action / effect due to the formation of the groove 49 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. (See also FIG. 4). 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. 2 (a) to 2 (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 arranged in a predetermined region, and then the water stop material is used by a predetermined method (this example). Then, it is composed by curing by irradiation with ultraviolet rays).

Specifically, as shown in FIG. 2A, 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 liquid resin 60a is arranged so as to cover the conductor core wire 11 exposed in the region S sandwiched between the first and second barrel portions 41 and 42. Further, the liquid resin 60a is arranged so as to fill the groove (corresponding to the region X in FIG. 4) of the groove-shaped portion 45a. Further, the liquid resin 60a is formed on the base end side portion of the upper end surface 35a of the first connecting portion 35, the entire front end side end surface 41a of the first barrel portion 41, the entire rear end side end surface 41b, and the second connecting portion 36. It is arranged so as to cover the entire upper end surface 36a 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 front end side end surface 41a and the rear 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, FIGS. 2 (b) and 2 (B) As shown in c), the excess resin 60a flows into the grooves 48 and 49 and is blocked. As a result, it is possible to prevent the resin 60a from spreading outside the region (a range not assumed in the design) (particularly, dripping of liquid on the side surfaces of the first and second barrel portions 41 and 42). In this way, the grooves 48 and 49 function as a damming structure that regulates the flow range of the resin 60a. Further, since the edge portions on the distal end side and the edge portion on the proximal end side of the grooves 48 and 49 are opened with an upward inclination, the edges thereof are inclined downward and opened. Liquid dripping from the opening can also be suppressed.

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.

<Action / effect>
As described above, according to the electric wire 1 with terminals according to the embodiment of the present invention, the liquid resin 60a (in this example, the ultraviolet curable resin 60a) is dropped so as to cover the connecting portion between the terminal metal fitting 20 and the conductor core wire 11. Even if the amount of the resin 60a dropped is larger than the design value, the excess resin 60a flows into the groove-shaped grooves 48 and 49 and is blocked, so that the resin reaches a range not expected in the design. It is possible to suppress the 60a from getting wet and spreading. Therefore, the waterproof 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 resin 60a. Therefore, the terminal-equipped electric wire 1 can achieve both high accuracy of forming the waterproof body 60 on the terminal-equipped electric wire 1 and high productivity of the terminal-equipped electric wire 1. Further, since the water stop body 60 can be formed at an appropriate position of the terminal fitting 20, the electric wire 1 with a terminal accommodates the electric wire 1 with a terminal in the terminal accommodating chamber (not shown) of the connector housing (not shown), for example. Workability can be improved.

Further, for example, a liquid resin is placed on the outer surfaces of the crimping pieces 46 and 47 of the second barrel portion 42 so as to more reliably cover the end surface of the terminal fitting 20 (particularly, the end surface 42a on the tip end side of the second barrel portion 42). 60a may be dropped. In this case, the dropped resin 60a easily spreads to an unintended range by flowing and spreading along the outer surface of the crimping pieces 46 and 47. On the other hand, in the terminal fitting 20, the groove 48 receives the resin 60a flowing along the outer surface of the crimping pieces 46 and 47. Therefore, even in this case, it is possible to prevent the water blocking body 60 from being formed in a range not assumed in the design.

Further, according to the electric wire 1 with terminals, a groove-shaped portion 45a is defined at a position where the outer surfaces of the pair of crimping pieces 45 of the first barrel portion 41 face each other so as to fill the groove of the groove-shaped portion 45a. , A water stop body 60 is provided. Further, a groove 48 as a damming structure is provided on the outer surface of the pair of crimping pieces 45 (the outer surface located in the proximal end side region Y from the uppermost portion P), which is located outside the groove of the groove-shaped portion 45a. It is provided (see FIG. 4). Therefore, the above-mentioned galvanic corrosion can be more appropriately suppressed by closing the groove-shaped portion 45a, which is particularly liable to collect water when the electric wire 1 with terminals is flooded, with the water blocking body 60. Further, when the resin 60a is arranged so as to close the groove-shaped portion 45a, even if the resin 60a flows out of the groove, the flow range of the resin 60a is regulated by the groove 48.

Further, according to the electric wire 1 with a terminal of this configuration, the groove 48 extends from one side edge portion of the first barrel portion 41 to the other side edge portion, and the groove 48 extends from one side edge portion of the second barrel portion 42 to the other side edge portion. A groove 49 extends over the portion. Therefore, the outflow of the waterproof body 60 can be suppressed at any position in the axial direction of the first barrel portion 41 and the second barrel portion 42.

<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.

In the above embodiment, the grooves 48 and 49 are used as a damming structure that regulates the flow range of the resin 60a. However, the damming structure is not limited to the grooves 48 and 49 as long as the flow of the liquid resin 60a can be properly regulated. For example, as the damming structure, point-shaped depressions, rib-shaped protrusions, point-shaped protrusions, a combination thereof, and the like can be used.

In the above embodiment, the groove 48 extends from the front end edge portion of the first barrel portion 41 to the rear end edge portion, and the groove 49 extends from the front end edge portion of the second barrel portion 42 to the rear end edge portion. On the other hand, the groove 48 may extend only in a part of the first barrel portion 41 in the axial direction, or the groove 49 may extend only in a part of the second barrel portion 42 in the axial direction. .. Further, the groove 48 may be provided only in the first barrel portion 41, or the groove 49 may be provided only in the second barrel portion 42.

Further, in the above embodiment, an ultraviolet curable resin is used as the water blocking material constituting the water blocking body 60. On the other hand, as the water blocking material constituting the water blocking body 60, any material may be used as long as it can exhibit the water blocking function.

Here, the features of the above-described embodiments of the electric wire 1 with a terminal and the terminal fitting 20 according to the present invention are briefly summarized and listed below in [1] to [4], respectively.
[1]
An electric wire (1) with a terminal including an electric wire (10), a terminal fitting (20) attached to the electric wire (10), and a water stop body (60).
The terminal fitting (20)
The first barrel portion (41) crimped to the conductor core wire (11) exposed to the outside of the insulating coating (12) at the end of the electric wire (10), and
The terminal of the electric wire (10) has a second barrel portion (42) that is crimped to the insulating coating (12).
The waterproof body (60) is
It is composed of the water blocking material (60a) capable of forming the water blocking body (60) through the arrangement and curing of the water blocking material (60a) having fluidity, and the terminal fitting (20) and the conductor core wire ( It is provided so as to cover the connection part with 11).
At least one of the first barrel portion (41) and the second barrel portion (42)
A damming structure (48, 49) that regulates the flow range of the water blocking material (60a) on the outer surface that faces the outside when the terminal fitting (20) is attached to the electric wire (10). Have,
Electric wire with terminals (1).
[2]
In the electric wire with terminal (1) described in [1] above,
The first barrel portion (41) is
It has a mounting portion (32) on which the conductor core wire (11) is placed, and a pair of crimping pieces (45) extending from the previously described mounting portion (32), and surrounds the conductor core wire (11). The pair of the crimping pieces (45) is curved and the extending end of the pair of the crimping pieces (45) has a crimping shape that bites into the conductor core wire (11). A groove-shaped portion (45a) is defined at a position where the outer surfaces of the crimping piece (45) face each other.
The waterproof body (60) is
It is provided so as to fill the groove of the groove-shaped portion (45a).
The pair of crimping pieces (45)
The damming structure (48, 49) is provided on the outer surface of the pair of crimping pieces (45) that will be located outside the groove of the groove-shaped portion (45a).
Electric wire with terminals (1).
[3]
In the electric wire with terminal (1) according to the above [1] or the above [2],
The damming structure (48, 49)
A groove (48) extending from one end side edge portion of the first barrel portion (41) to the other end side edge portion in the axial direction of the terminal fitting (20), and one end side of the second barrel portion (42). At least one of the grooves (49) extending from the edge to the other end side edge.
The waterproof body (60) is
It is contained in at least a part of the groove (48, 49).
Electric wire with terminals (1).
[4]
A terminal fitting (20) attached to an electric wire (10) together with a waterproof body (60).
The first barrel portion (41) crimped to the conductor core wire (11) exposed to the outside of the insulating coating (12) at the end of the electric wire (10), and
A second barrel portion (42) that is crimped to the insulating coating (12) at the terminal of the electric wire (10) is provided.
At least one of the first barrel portion (41) and the second barrel portion (42)
A water blocking material (60a) having fluidity for forming the water blocking body (60) on an outer surface that faces the outside when the terminal fitting (20) is attached to the electric wire (10). Has a damming structure (48, 49) that regulates the flow range of
Terminal bracket (20).

1 Electric wire with terminal 10 Electric wire 11 Conductor core wire 11a End part (conductor core wire)
12 Insulation coating 20 Terminal metal fittings 32 Bottom wall (mounting part)
41 1st barrel part 42 2nd barrel part 45 Clamping piece 48 Groove (damming structure)
49 groove (damming structure)
60 still body

Claims (4)

An electric wire with a terminal including an electric wire, a terminal fitting attached to the electric wire, and a waterproof body.
The terminal fitting
The first barrel portion that is crimped to the conductor core wire that is exposed to the outside of the insulation coating at the end of the electric wire, and
It has a second barrel portion that is crimped to the insulating coating at the terminal of the electric wire.
The waterproof body is
It is composed of the water-stopping material capable of forming the water-stopping body through the arrangement and curing of the water-stopping material having fluidity, and is provided so as to cover the connecting portion between the terminal fitting and the conductor core wire.
At least one of the first barrel portion and the second barrel portion
The outer surface that faces the outside when the terminal fitting is attached to the electric wire has a damming structure that regulates the flow range of the water blocking material.
Electric wire with terminals. In the electric wire with a terminal according to claim 1,
The first barrel portion is
It has a mounting portion on which the conductor core wire is placed and a pair of crimping pieces extending from the previously described mounting portion, and the pair of crimping pieces are curved so as to surround the conductor core wire and the pair of crimping pieces. Since the extending end of the crimping piece has a crimping shape that bites into the conductor core wire, a groove-shaped portion is defined at a position where the outer surfaces of the pair of crimping pieces face each other.
The waterproof body is
It is provided so as to fill the groove of the groove-shaped portion.
The pair of crimping pieces
The damming structure is provided on the outer surface of the pair of crimping pieces to be located outside the groove of the groove-shaped portion.
Electric wire with terminals. In the electric wire with a terminal according to claim 1 or 2.
The damming structure
A groove extending from one end side edge portion of the first barrel portion to the other end side edge portion and a groove extending from one end side edge portion of the second barrel portion to the other end side edge portion in the axial direction of the terminal fitting. At least one of
The waterproof body is
In at least part of the groove,
Electric wire with terminals. A terminal fitting that can be attached to an electric wire together with a waterproof body.
The first barrel portion that is crimped to the conductor core wire that is exposed to the outside of the insulation coating at the end of the electric wire, and
A second barrel portion that is crimped to the insulating coating at the terminal of the electric wire is provided.
At least one of the first barrel portion and the second barrel portion
The outer surface that faces the outside when the terminal fitting is attached to the electric wire has a damming structure that regulates the flow range of the water blocking material having fluidity for forming the water blocking body.
Terminal bracket.

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