JP2022146960A - Terminal fitting and electric wire with terminal - Google Patents

Abstract

To improve an electric connection stability with a core wire.SOLUTION: A terminal fitting comprises: a core wire connection body 22 making a core wire 11 formed by a plurality of element wires 11a connect to the core wire of an electric wire 10 coated with a coating 12. The core wire connection body includes: a bottom part 22a; a pair of cantilever side wall parts 22b and 22b which are stood from the bottom part, and are oppositely arranged with an interval from each other; at least one pair of a pair of pressure-weldings 24 and 24 which is oppositely arranged with the interval from each other between them, and makes the coating of the electric wire inserted from an opening 22c between free-ends 22b1 and 22b1 in the pair of side wall parts contact, with a pressure, each element wire of the outermost layer of the core wire by being broken and opened; and a plurality of piercing bodies 25 that are projected toward the opening from the bottom part side and breaks the coating of the electric wire to be pierced between the element wires of the core wire in an inner side from the element wire of the outermost layer. The plurality of piercing bodies are off-set to the shaft direction of the assembled electric wires to the core wire connection body, and are off-set and arranged each other an opposite arrangement direction of the pair of side wall parts.SELECTED DRAWING: Figure 1

Description

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

Conventionally, as a terminal fitting, a so-called piercing terminal for physically and electrically connecting an electric wire in which a core wire composed of a plurality of wires is covered with a coating is known. In the piercing terminal, the core wire connection body is provided with a piercing portion for piercing through the coating of the electric wire and piercing between the strands of the core wire. Terminal fittings of this type are disclosed, for example, in Patent Documents 1 to 7 below.

JP-A-2002-270253 JP-A-2003-243060 Japanese Patent Application Laid-Open No. 2003-249280 JP-A-2003-257511 Japanese Patent Application Laid-Open No. 2003-264012 JP 2003-317819 A JP-A-2004-253198

By the way, in conventional terminal fittings, as the number of strands constituting the core wire increases, there is a possibility that the number of strands that cannot contact the piercing portion increases. For this reason, in this conventional terminal fitting, there is a possibility that an increase in electrical resistance with the core wire is caused. Therefore, conventional terminal fittings have room for improvement in terms of improving the electrical connection stability with core wires.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a terminal fitting and an electric wire with a terminal that can improve the stability of electrical connection with a core wire.

In order to achieve the above object, a terminal fitting according to the present invention has a core wire connector for physically and electrically connecting a core wire of an electric wire in which a core wire composed of a plurality of strands is covered with a coating. , the core wire connector includes a bottom portion, a pair of cantilever side wall portions erected from the bottom portion and opposed to each other with a space therebetween, and a space between the pair of side wall portions At least one pair of wires which are arranged to face each other and which are inserted through openings between the free ends of the pair of side wall portions and are pressed against the strands of the outermost layer of the core wires by tearing the coating of the wires. and a plurality of piercing bodies projecting from the bottom side toward the opening, piercing through the coating of the electric wire, and piercing between the strands of the core wire inside the strands of the outermost layer. , wherein the plurality of piercing bodies are offset from each other in the axial direction of the electric wire assembled to the core connector and are offset from each other in the opposing arrangement direction of the pair of side wall portions. It is characterized by

Further, in order to achieve the above object, an electric wire with a terminal according to the present invention includes an electric wire in which a core wire composed of a plurality of strands is covered with a coating, and a terminal fitting to be assembled with the electric wire, wherein the terminal fitting has a core wire connector that is physically and electrically connected to the core wire, and the core wire connector includes a bottom and a pair of core wire connectors erected from the bottom and arranged to face each other with a gap and the covering of the electric wire disposed between the pair of side walls with a space therebetween and facing each other with a gap therebetween and inserted through openings between the free ends of the pair of side walls. and at least one pair of pressure contact bodies that are pressed against the strands of the outermost layer of the core wire and protrude from the bottom side toward the opening, break through the coating of the electric wire, and penetrate the outermost and a plurality of piercing bodies that pierce between the strands of the core wire inside the strands of the outer layer, and the plurality of piercing bodies are offset from each other in the axial direction of the electric wire assembled to the core wire connector. Further, the pair of side wall portions are offset from each other in the opposing arrangement direction.

In the terminal fitting according to the present invention, each of the piercing bodies can be used to make contact with most of the plurality of strands forming the core wire inside the outermost layer, as compared with the conventional terminal fitting. In addition to this, in this terminal fitting, each pair of press-contact bodies is in contact with the outermost strand of the core wire. Therefore, even if the core wire is composed of a large number of wires, this terminal fitting comes into contact with a larger number of wires regardless of the inner and outer layers of the core wire compared to conventional terminal fittings. Since the contact area can be increased, an increase in electrical resistance with the core wire can be suppressed.

Further, in electric wires, when the strands are made of aluminum or an aluminum alloy, an oxide film is formed on the surface of the strands. However, the pair of pressure contact bodies scrape off the oxide film of the outermost layer of the wires in the core wire while the wire is being pushed. Therefore, in the terminal fitting, the pair of pressure contact bodies can be brought into contact with the outermost strand of the core wire without an oxide film interposed therebetween. Furthermore, while the piercing body is piercing between the wires of the core wire, the piercing body scrapes off the surface oxide film while rubbing the surface of the wire. Therefore, in the terminal fitting, the piercing body can be brought into contact with the strands inside the strands of the outermost layer of the core wire without intervening an oxide film. Therefore, this terminal fitting can suppress an increase in electrical resistance with the core wire even when the element wire is formed of aluminum or an aluminum alloy.

As described above, the terminal fitting according to the present invention can suppress an increase in electrical resistance between the terminal fitting and the core wire, so that the electrical connection stability with the core wire can be improved. And since the electric wire with a terminal which concerns on this invention is equipped with this terminal metal fitting, it can acquire the same effect as what this terminal metal fitting plays|plays.

FIG. 1 is an exploded perspective view showing a terminal fitting and an electric wire with a terminal according to an embodiment. FIG. 2 is a perspective view showing a terminal metal fitting and an electric wire with a terminal of the embodiment. FIG. 3 is a plan view of the terminal fitting and the electric wire with the terminal of the embodiment, viewed from the opening side. FIG. 4 is a schematic diagram of a cross section taken along line X1-X1 in FIG. FIG. 5 is a schematic diagram of a cross section taken along line X2-X2 of FIG. FIG. 6 is a schematic diagram of a cross section taken along line X3-X3 of FIG. FIG. 7 is a schematic diagram of a cross section taken along line X4-X4 of FIG. FIG. 8 is a schematic diagram of a cross section corresponding to the X3-X3 line cross section of FIG. 3 in FIG. FIG. 9 is a plan view of the terminal fitting viewed from the opening side.

EMBODIMENT OF THE INVENTION Below, embodiment of the terminal metal fitting which concerns on this invention, and an electric wire with a terminal is described in detail based on drawing. In addition, this invention is not limited by this embodiment.

[Embodiment]
One embodiment of a terminal metal fitting and an electric wire with a terminal according to the present invention will be described with reference to FIGS. 1 to 9. FIG.

Reference numeral 1 in FIGS. 1 to 8 indicates an electric wire with a terminal according to this embodiment. This electric wire with terminal 1 includes an electric wire 10 and a terminal fitting 20 attached to the electric wire 10, which are physically and electrically connected.

The electric wire 1 with a terminal may have a terminal fitting 20 connected to the end of the electric wire 10 or may have a terminal fitting 20 connected to a portion between both ends of the electric wire 10 . Moreover, this electric wire 1 with a terminal may be one in which at least one terminal metal fitting 20 is connected to one electric wire 10, and a plurality of electric wires 10 are connected by at least one terminal metal fitting 20, and the terminal A plurality of electric wires 10 may be electrically connected via metal fittings 20 . For example, the terminal fitting 20 can be physically and electrically connected to the mating terminal fitting by fitting connection to the mating terminal fitting, or can be fixed to the mating terminal fitting by screwing. When formed to be physically and electrically connected to the electrical connection, it is connected to the end of at least one wire 10 . Further, for example, when the terminal fitting 20 is formed as a joint terminal for electrically connecting a plurality of electric wires 10 , it is connected to the end of the electric wire 10 or a portion between both ends of the electric wire 10 . The terminal fitting 20 in this case may be a joint terminal that physically and electrically connects the plurality of wires 10 and electrically connects all the wires 10 through itself. is a joint terminal for physically and electrically connecting at least two of them into one combination, and may be provided for each combination. In the electric wire 1 with terminal shown here, one terminal fitting 20 to be fit-connected to the mating terminal fitting is connected to the end of one electric wire 10 .

The electric wire 10 includes a core wire 11 composed of a plurality of strands 11a and a coating 12 that covers the core wire 11 (FIGS. 1 and 4 to 8). The electric wire 10 shown here includes a core wire 11 in which a plurality of strands 11a made of a conductive metal wire are bundled in a cylindrical shape, a cylindrical coating 12 that concentrically covers the core wire 11 from the outer surface side, It has The wire 11a is made of, for example, aluminum, an aluminum alloy, copper, or a copper alloy.

The core wire 11 may be formed by bundling a plurality of strands 11a with their axial directions aligned with each other in a columnar shape, or a twisted wire obtained by twisting the plurality of strands 11a bundled in a columnar shape. may be Furthermore, the core wire 11 as the stranded wire may be obtained by twisting together all the strands 11a bundled in a cylindrical shape. A plurality of remaining strands 11a may be wound around the wire 11a, and a plurality of strand groups are formed by twisting the plurality of strands 11a, and the plurality of strand groups are formed. It may be bundled into a cylindrical shape and twisted together.

Even if the core wire 11 adopts any form such as these, a plurality of strands 11a are arranged in the outermost layer, and a plurality of strands 11a are arranged inside the plurality of strands 11a in the outermost layer. of wires 11a are arranged. The terminal fitting 20 used for the electric wire 1 with a terminal is intended to be connected to the electric wire 10 provided with the core wire 11 composed of such a large number of strands 11a. In particular, the terminal fitting 20 has a core wire 11 in which a plurality of wires 11a are arranged in a plurality of layers inside a plurality of wires 11a in the outermost layer (that is, an outermost layer composed of a plurality of wires 11a). and a plurality of inner layers composed of a plurality of strands 11a.

The terminal fitting 20 is molded from a conductive material such as metal. The terminal fitting 20 shown here is formed by press molding using a metal plate as a base material. This terminal fitting 20 has a terminal connector 21 physically and electrically connected to a terminal connector (not shown) of the mating terminal fitting and a core wire 11 at the end of the electric wire 10 physically and electrically. It has a core wire connection body 22 to be connected and a covering connection body 23 physically connected to the covering 12 of the end of the electric wire 10 (FIGS. 1 to 3 and 9).

For example, the terminal connection body 21 of the terminal fitting 20 and the terminal connection body of the mating terminal fitting are formed such that one of them is formed in the shape of a female terminal and the other is formed in the shape of a male terminal and is inserted and fitted together. be combined. In this example, the terminal connection body 21 of the terminal fitting 20 is formed in the shape of a female terminal, and the terminal connection body of the mating terminal fitting is formed in the shape of a male terminal.

The core wire connector 22 has a bottom portion 22a and a pair of cantilevered side wall portions 22b, 22b erected from the bottom portion 22a and opposed to each other with a space therebetween (FIGS. 1, 2 and 2). 4 to 9). The terminal of the electric wire 10 is accommodated in a space surrounded by the bottom portion 22a and the pair of side wall portions 22b, 22b. In the core wire connector 22 shown here, a pair of rectangular side wall portions 22b, 22b are vertically provided from both ends of a rectangular bottom portion 22a. In this core wire connector 22, an opening 22c between the free ends 22b ₁ and 22b ₁ of the pair of side wall portions 22b and 22b is provided in the space surrounded by the bottom portion 22a and the pair of side wall portions 22b and 22b. through which the end of the wire 10 is inserted (FIGS. 1, 2 and 4-8).

Further, the core wire connecting body 22 is arranged between the pair of side wall portions 22b, 22b so as to face each other with a space therebetween, and cuts the covering 12 of the electric wire 10 inserted from the opening 22c to form the outermost layer of the core wire 11. At least one pair of pressing members 24, 24 is provided to press the wire 11a (FIGS. 1 to 9). The core wire connecting body 22 shown here has three sets of the pair of pressure contact bodies 24 , 24 . The three pairs of pressure contact bodies 24 , 24 are spaced apart from each other in the axial direction of the electric wire 10 assembled to the core wire connector 22 .

For example, when a twisted wire is used for the core wire 11, each pair of pressure contact members 24, 24 are arranged so that they do not come into contact with the same combination of strands 11a, considering the twist pitch of the core wire 11. It is desirable to define the spacing between adjacent ones. As a result, in this terminal fitting 20, the wires 11a in the outermost layer that are in contact with each other are different for each pressure contact body 24, or the pressure contact bodies 24 may contact the same wire 11a in the outermost layer. Since the combination of the wires 11a in the outermost layer that are in contact is different for each pressure contact member 24, each pair of pressure contact members 24, 24 can be used to contact most of the plurality of wires 11a in the outermost layer. can. That is, in this terminal fitting 20, when a twisted wire is used for the core wire 11, the number of the outermost layer strands 11a that are in contact with these can be increased by using a pair of pressure contact bodies 24, 24, respectively. .

The pair of press-contact members 24, 24 may each protrude from the bottom portion 22a toward the opening 22c. It may protrude from the side wall portion 22b toward one of the side wall portions 22b. The press-contact body 24 shown here is formed as a piece body obtained by bending a portion of the side wall portion 22b by 90 degrees.

The pair of press-contact members 24, 24 are arranged opposite to each other with a gap in the opposing arrangement direction of the pair of side wall portions 22b, 22b, and have press-contact end portions 24a, 24a into which the electric wire 10 is press-fitted (FIGS. 4 and 4). Figure 9). In the pair of press-contact members 24, 24, the core wire 11 is sandwiched between the press-contact end portions 24a, 24a, respectively, and the wire 11a of the outermost layer of the core wire 11 is pressed from the press-contact end portions 24a, 24a. By applying a pressing force, it is physically and electrically connected to the strands 11a of the outermost layer. Therefore, in the pair of pressure contact bodies 24, 24, the distance between the pressure contact end portions 24a, 24a is narrower than the diameter of the core wire 11. As shown in FIG. The press-contact end portion 24a may be formed as a flat surface along the insertion direction of the electric wire 10 from the opening 22c, or may be formed as a blade-shaped press-contact blade. The press contact end portion 24a shown here is formed as a plane having a thickness corresponding to the plate thickness of the base material.

Also, the pair of pressure contact members 24, 24 are insertion starting points when the electric wire 10 is press-fitted between the pressure contact end portions 24a, 24a at the ends on the side of the opening 22c. , 24a. For example, the pair of pressure contact members 24, 24 are connected to the pressure contact end portions 24a, 24a at the ends on the side of the opening 22c, respectively, and further extend toward the opening 22c side from the boundary with the pressure contact end portions 24a, 24a. It has inclined portions 24b, 24b that widen the distance between them (FIGS. 4 and 9). The core wire lead-in portion is formed by the respective inclined portions 24b, 24b. The inclined portion 24b may be formed as a flat surface having a thickness corresponding to the plate thickness of the base material, or may be formed as a blade-shaped pressure contact blade. The inclined portion 24b shown here is formed as a pressure contact blade.

The electric wire 10 is inserted from the opening 22c into the space surrounded by the bottom portion 22a and the pair of side wall portions 22b, 22b. Along with this, the pair of pressure contact bodies 24, 24 cut the sheath 12 of the electric wire 10 that has been pushed in by the respective inclined portions 24b, 24b, exposing the outermost strand 11a of the core wire 11 in the sheath 12. . By further pushing the electric wire 10 inward, the bare outermost strand 11a of the core wire 11 is rubbed along the respective pressure contact ends 24a, 24a, and the respective pressure contact ends 24a, 24a are rubbed. is pressed in between As a result, in this electric wire 10, the core wire 11 is in a state of pressure contact between the respective pressure contact ends 24a, 24a, and the outermost layer strand 11a of the core wire 11 is connected to the terminal through the pressure contact ends 24a, 24a. It is physically and electrically connected to the fitting 20 .

Further, the core wire connector 22 projects from the bottom 22a side toward the opening 22c, breaks through the coating 12 of the electric wire 10, and pierces between the strands of the core wire 11 inside the strand 11a of the outermost layer. It has a plurality of piercing bodies 25 (FIGS. 1 and 5 to 9). The piercing body 25 shown here is formed in a needle shape by bending a portion of the bottom 22a by 90 degrees. When the core wire 11 is formed by twisting a plurality of strand groups, the piercing body 25 is pierced between the strand groups or between the strands 11a forming the strand group.

In this terminal fitting 20, by inserting the electric wire 10 through the opening 22c, the electric wire 10 is pushed between the pair of pressure contact bodies 24, 24, and between the strands of the core wire 11 of the electric wire 10, respectively. of the piercing body 25 is pierced.

Here, the plurality of piercing bodies 25 are offset from each other in the axial direction of the electric wire 10 assembled to the core wire connector 22, and are offset from each other in the opposing arrangement direction of the pair of side wall portions 22b, 22b. (Figures 1 and 9). As a result, in this terminal fitting 20, as compared with the conventional terminal fitting 20, each of the piercing bodies 25 can be used to contact most of the plurality of strands 11a forming the core wire 11 inside the outermost layer. can be done. In addition, in this terminal fitting 20 , each pair of pressure contact bodies 24 , 24 is in contact with the outermost strand 11 a of the core wire 11 . Therefore, even if the core wire 11 is composed of a large number of wires 11a, the terminal fitting 20 can come into contact with many wires 11a regardless of the inner and outer layers of the core wire 11 compared to the conventional terminal fitting 20. Since the contact area with the core wire 11 can be increased, an increase in electrical resistance with the core wire 11 can be suppressed.

Further, in the electric wire 10, when the wire 11a is made of aluminum or an aluminum alloy, an oxide film is formed on the surface of the wire 11a. However, while the electric wire 10 is being pushed, the pair of press-contact members 24, 24 are pressed against the outermost strand 11a of the core wire 11 by the respective inclined portions 24b, 24b and the respective press-contact end portions 24a, 24a. Scrape off the oxide film. Therefore, the terminal fitting 20 can bring the pair of pressure-contact members 24, 24 into contact with the outermost strand 11a of the core wire 11 without an oxide film interposed therebetween. Further, while the piercing body 25 is piercing between the wires of the core wire 11, the piercing body 25 scrapes the surface of the wire 11a and scrapes off the oxide film on the surface. Therefore, in the terminal fitting 20, the piercing body 25 can be brought into contact with the wires 11a inside the outermost layer wires 11a of the core wire 11 without an oxide film interposed therebetween. Therefore, this terminal fitting 20 can suppress an increase in electrical resistance between the core wire 11 and the wire 11a even when the wire 11a is made of aluminum or an aluminum alloy.

The terminal fitting 20 shown here has three piercing bodies 25 (a first piercing body 25A, a second piercing body 25B, and a third piercing body 25C) (FIGS. 1, 8 and 9). The first piercing body 25A is arranged between the second piercing body 25B and the third piercing body 25C in the axial direction of the electric wire 10, and the pair of side wall parts 22b, 22b are arranged in the opposite direction of the side wall parts 22b, 22b. 22b at approximately the same distance. The second piercing body 25B is arranged closer to the terminal connection body 21 than the first piercing body 25A in the axial direction of the electric wire 10, and is closer to the first piercing body 25A than the first piercing body 25A in the opposing arrangement direction of the pair of side wall portions 22b, 22b. It is arranged closer to one side wall portion 22b. The third piercing body 25C is arranged in the axial direction of the electric wire 10 on the side in the direction in which the electric wire 10 is pulled out from the core wire connector 22 relative to the first piercing body 25A, and in the direction in which the pair of side wall portions 22b, 22b face each other. It is arranged closer to the other side wall portion 22b than the first piercing body 25A.

In this terminal fitting 20, when a stranded wire is used for the core wire 11, the plurality of piercing bodies 25 are in contact with each other inside the outermost layer of the strand 11a. 25 are preferably arranged as follows. When a twisted wire is used for the core wire 11, the plurality of piercing bodies 25 are arranged in consideration of the twist pitch of the core wire 11 so that they do not come into contact with the same combination of strands 11a. As a result, in this terminal fitting 20, the wires 11a that come into contact inside the wires 11a of the outermost layer are different for each piercing member 25, or the pressure contact members 24 contact the same wires 11a. However, each piercing body 25 has a different combination of wires 11a that are in contact inside the outermost layer of wires 11a. It can be brought into contact with many wires 11a inside. That is, in this terminal fitting 20, when a stranded wire is used for the core wire 11, the number of strands 11a that are in contact with each of the piercing bodies 25 inside the strands 11a of the outermost layer is increased. be able to.

Here, in this terminal metal fitting 20, the increase in electrical resistance between the core wire 11 and the core wire 11 is appropriately suppressed by determining the arrangement and shape of the piercing body 25 as follows.

The piercing body 25 presses the strands 11a of the core wire 11 against the wires 11a of the core wire 11 and the pressing force from the pressing body 24 against the strands 11a of the outermost layer of the core wire 11. It is desirable to place it at a position where a clamping force is applied to it.

As a result, in this terminal fitting 20, between the pair of pressure contact bodies 24 and 24 and the strand 11a of the outermost layer of the core wire 11, and between the piercing body 25 and the strand 11a of the core wire 11 inside the outermost layer of the core wire 11, Firm contact with line 11a is now possible and can be maintained in that contact. Therefore, this terminal metal fitting 20 can appropriately suppress an increase in electrical resistance between itself and the core wire 11 .

Further, in the terminal metal fitting 20 shown here, after the core wire 11 starts to be sandwiched between the pair of pressure contact bodies 24, 24, the respective piercing bodies 25 are pierced between the strands of the core wire 11. As shown in FIG. In this terminal metal fitting 20, the pair of pressure contact bodies 24 and 24 and the piercing body 25 are arranged in a positional relationship that allows the above-mentioned clamping force to act. Since the piercing body 25 can be pierced between the strands of the core wire 11 being performed, the contact of the piercing body 25 with the strand 11a can be ensured. Therefore, this terminal metal fitting 20 can appropriately suppress an increase in electrical resistance between itself and the core wire 11 .

Furthermore, by arranging the piercing body 25 at a position where the aforementioned clamping force can be applied, the force with which the core wire 11 is pierced against the wires 11a is increased. Therefore, the piercing body 25 can effectively scrape off the oxide film on the surface of the wire 11a when the wire 11a is made of aluminum or an aluminum alloy. Therefore, this terminal fitting 20 can appropriately suppress an increase in electrical resistance between the core wire 11 and the wire 11a even when the wire 11a is made of aluminum or an aluminum alloy.

For example, the piercing body 25 is desirably arranged between the pair of pressing bodies 24, 24 in order to obtain the maximum clamping force.

In addition, the piercing body 25 has a shape that can be pierced between the strands of the core wire 11 until the tip reaches the outermost layer of the core wire 11 again from the point between the strands of the outermost layer of the core wire 11 where the tip starts to pierce. is desirable. As a result, the piercing body 25 can contact many strands 11a inside the outermost layer of the core wire 11, so that the contact area with the strands 11a inside can be increased. . Therefore, this terminal metal fitting 20 can appropriately suppress an increase in electrical resistance between itself and the core wire 11 .

The covering connector 23 is composed of a bottom portion 23a and a pair of barrel pieces 23b, 23b projecting from both ends of the bottom portion 23a (FIGS. 1, 2 and 9). In this covered connector 23, for example, the end of the electric wire 10 is inserted through an opening 23c (FIG. 1) between the free ends 23b ₁ and 23b ₁ of the barrel pieces 23b and 23b, and the covering 12 is attached to the bottom 23a. placed on the inner wall surface (bottom surface) of the The covered connector 23 is, for example, wound around the covering 12 of the end of the electric wire 10 while pressurizing and deforming the respective barrel pieces 23b, 23b.

As described above, the terminal fitting 20 of the present embodiment can suppress an increase in electrical resistance between itself and the core wire 11, so that the electrical connection stability with the core wire 11 can be improved. And since the electric wire 1 with a terminal is provided with this terminal metal fitting 20, the same effect as this terminal metal fitting 20 can be obtained.

In addition, when connecting a plurality of electric wires 10, the terminal fitting according to the present invention, for example, has the lengths of the pressure contact ends 24a, 24a of the pair of pressure contact bodies 24, 24 and the length of the piercing body 25 to be connected. A plurality of wires 10 may be connected to one combination of at least one pair of pressure contact members 24 and 24 and a plurality of piercing members 25 by increasing the length according to the number of wires 10 to be used. Further, in the terminal fitting according to the present invention, when connecting a plurality of electric wires 10, for example, at least one pair of pressure contact members 24, 24 and a plurality of piercing members 25 are provided for each electric wire 10. There may be.

Reference Signs List 1 electric wire with terminal 10 electric wire 11 core wire 11a element wire 12 coating 20 terminal fitting 22 core wire connector 22a bottom 22b side wall 22b ₁ free end 22c opening 24 pressure contact body 25 piercing body 25A first piercing body 25B second piercing body 25C third third piercing body

Claims (5)

A core wire connecting body for physically and electrically connecting a core wire made of a plurality of strands to a core wire of an electric wire covered with a coating,
The core wire connector includes a bottom portion, a pair of cantilever side wall portions erected from the bottom portion and opposed to each other with a space therebetween, and a space between the pair of side wall portions and opposed to each other. and at least one pair of pressure contacts for cutting the coating of the electric wires inserted through the openings between the free ends of the pair of side wall portions and making pressure contact with the strands of the outermost layer of the core wires. a body, a plurality of piercing bodies projecting from the bottom side toward the opening, piercing the coating of the electric wire, and piercing between the strands of the core wire inside the strands of the outermost layer; has
The plurality of piercing bodies are offset from each other in the axial direction of the electric wire assembled to the core wire connector and are arranged to be offset from each other in the opposing arrangement direction of the pair of side wall portions. terminal fittings. The piercing body exerts a clamping force on the wire interposed between the piercing body and the pressure contact body due to its own pressing force against the wire and the pressure force from the pressure contact body against the wire of the outermost layer. 2. The terminal fitting according to claim 1, wherein the terminal fitting is arranged at a position where the terminal fitting The piercing body has a shape that can pierce between the wires of the outermost layer, where the tip starts to pierce, until the tip reaches the outermost layer again. The terminal fitting according to claim 1 or 2. When a twisted wire is used as the core wire, the plurality of piercing bodies are arranged so that they do not come into contact with the same combination of strands, taking into consideration the twist pitch of the core wire. Item 1, 2 or 3 terminal fitting according to. An electric wire in which a core wire composed of a plurality of strands is covered with a coating;
a terminal fitting attached to the electric wire;
with
The terminal fitting has a core wire connector that is physically and electrically connected to the core wire,
The core wire connector includes a bottom portion, a pair of cantilever side wall portions erected from the bottom portion and opposed to each other with a space therebetween, and a space between the pair of side wall portions and opposed to each other. and at least one pair of pressure contacts for cutting the coating of the electric wires inserted through the openings between the free ends of the pair of side wall portions and making pressure contact with the strands of the outermost layer of the core wires. a body, a plurality of piercing bodies projecting from the bottom side toward the opening, piercing the coating of the electric wire, and piercing between the strands of the core wire inside the strands of the outermost layer; has
The plurality of piercing bodies are offset from each other in the axial direction of the electric wire assembled to the core wire connector and are arranged to be offset from each other in the opposing arrangement direction of the pair of side wall portions. Wire with terminals.

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