JP6809811B2 - Wire with terminal and wire harness - Google Patents

Description

The present invention relates to electric wires, electric wires with terminals, and wire harnesses, and in particular, electric wires having conductors having one or more strands, electric wires with terminals to which the electric wires are connected to terminals, and wire harnesses having the electric wires. Regarding.

Conventionally, electric wires have been used for transmitting and receiving electric signals and supplying electric power. For example, for wiring in an automobile, a wire with a terminal using an electric wire or a wire harness having a large number of electric wires or a wire with a terminal is used. These conventional electric wires are formed by twisting aluminum strands (see, for example, Patent Document 1).

JP-A-2007-305355

However, since the surface of the aluminum wire tends to form an insulating film such as an oxide film, it becomes difficult to secure an electrical connection between the wires, and as a result, the conductive performance of the electric wire becomes unstable. There is. As described above, in the conventional electric wire structure, the conductive performance may become unstable, and the electric wire structure capable of improving the conductive performance has been required.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric wire, an electric wire with a terminal, and a wire harness capable of improving the conductive performance.

In order to achieve the above object, the electric wire according to the present invention is an electric wire having one or a plurality of conductive strands, and the strands have at least one recess recessed from the surface toward the inside. It is characterized by having.

In the electric wire according to one aspect of the present invention, the recess extends along the extending direction of the wire.

In the electric wire according to one aspect of the present invention, the recess extends in the range of the wire having a length equal to or greater than the value of the diameter of the wire in the extending direction of the wire.

In the electric wire according to one aspect of the present invention, the depth of the recess is a value of 10% or more of the diameter value of the wire.

In the electric wire according to one aspect of the present invention, the total number of the recesses is more than twice the total number of the strands.

In the electric wire according to one aspect of the present invention, the total number of the recesses is more than 19.

In the electric wire according to one aspect of the present invention, the wire is formed of aluminum or an aluminum alloy.

In the electric wire according to one aspect of the present invention, the cross-sectional area of the conductor formed from the strand of the electric wire in the cross section intersecting the extending direction of the electric wire is 2 mm ² or more.

The electric wire according to one aspect of the present invention includes only one of the strands.

In the electric wire according to one aspect of the present invention, the total number of the strands is 19 or less.

In order to achieve the above object, the electric wire with a terminal according to the present invention includes a terminal and the electric wire, and the electric wire is compressed and sandwiched and connected to the terminal in the radial direction of the wire. It is characterized by being.

In the electric wire with terminals according to one aspect of the present invention, the compressibility of the conductor formed from the strands of the electric wire in the portion sandwiched by the terminals is 50 to 80%.

In the electric wire with a terminal according to one aspect of the present invention, the terminal has a plurality of grooves formed in a portion sandwiching the electric wire.

In order to achieve the above object, the wire harness according to the present invention is characterized by including the above-mentioned electric wire.

In order to achieve the above object, the wire harness according to the present invention is characterized by including the above-mentioned electric wire with a terminal.

According to the electric wire, the electric wire with a terminal, and the wire harness of the present invention, the conductive performance can be improved.

It is a figure for showing the schematic structure of the electric wire which concerns on 1st Embodiment of this invention, and FIG. 1A is the perspective view which shows the schematic structure of the electric wire which concerns on 1st Embodiment of this invention. 1 (b) is a plan view of an electric wire for showing the recess in FIG. 1 (a), and FIG. 1 (c) is an enlarged perspective view of the electric wire for showing the recess in FIG. 1 (a). Is. It is a figure for showing the schematic structure of the electric wire with a terminal which concerns on 2nd Embodiment of this invention, and FIG. 2 (a) shows the connection terminal in the electric wire with a terminal which concerns on 2nd Embodiment of this invention. 2 (b) is a perspective view of an electric wire with a terminal according to a second embodiment of the present invention, and FIG. 2 (c) is an electric wire with a terminal shown in FIG. 2 (b). It is an enlarged sectional view of the crimping portion of. It is a figure for showing the schematic structure of the wire harness which concerns on 3rd Embodiment of this invention. It is a top view of the electric wire for showing the 1st modification of the electric wire which concerns on 1st Embodiment of this invention. It is a top view of the electric wire for showing the 2nd modification of the electric wire which concerns on 1st Embodiment of this invention. It is a top view of the electric wire for showing the 3rd modification of the electric wire which concerns on 1st Embodiment of this invention. It is a figure for showing the 4th modification of the electric wire which concerns on 1st Embodiment of this invention, FIG. 7A is a plan view of the electric wire which concerns on this modification, FIG. 7B. Is an enlarged perspective view of the electric wire according to this modified example. It is an enlarged perspective view of the electric wire for showing the 5th modification of the electric wire which concerns on 1st Embodiment of this invention. 9 is a diagram for showing a schematic configuration of an electric wire according to a fourth embodiment of the present invention, and FIG. 9A is a perspective view of the electric wire according to the fourth embodiment of the present invention. (B) is a plan view of an electric wire for showing a recess in FIG. 9 (a). It is a figure for showing the schematic structure of the electric wire with a terminal which concerns on 5th Embodiment of this invention, and FIG. 10A is the perspective view of the electric wire with terminal which concerns on 5th Embodiment of this invention. 10 (b) is an enlarged cross-sectional view of a crimped portion of the electric wire with a terminal shown in FIG. 10 (a). It is a top view of the electric wire for showing the 1st modification of the electric wire which concerns on 4th Embodiment of this invention. It is a top view of the electric wire for showing the 2nd modification of the electric wire which concerns on 4th Embodiment of this invention. It is a top view of the electric wire for showing the 3rd modification of the electric wire which concerns on 4th Embodiment of this invention. It is a top view of the electric wire for showing the 4th modification of the electric wire which concerns on 4th Embodiment of this invention.

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

First, the configuration of the electric wire according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram for showing a schematic configuration of an electric wire 1 according to the first embodiment of the present invention, and FIG. 1A is a perspective view showing a schematic configuration of the electric wire 1; b) is a plan view of the wire 11 for showing the recess 12 in the electric wire 1, and FIG. 1 (c) is an enlarged perspective view of the wire 11 for showing the recess 12 in the wire 1.

The electric wire 1 according to the first embodiment of the present invention includes only one conductive wire 11, and the wire 11 has a recess 12 recessed in a slit shape from the surface toward the inside. I have at least one.

As shown in FIGS. 1A, 1B, and 1C, the electric wire 1 according to the first embodiment of the present invention includes a conductor 13 formed of a wire 11 made of aluminum or an aluminum alloy. It has an insulating coating portion 14 formed of an insulating material covering the conductor 13. Hereinafter, the term "aluminum" refers to pure aluminum and aluminum alloy. At the end of the electric wire 1, the conductor 13 is not covered with the insulating coating portion 14, and the connecting exposed portion 15 is formed in which the conductor 13 is exposed. As will be described later, in the electric wire 5 with terminals, the connection terminal 4 is crimp-connected to the connection exposed portion 15 where the conductor 13 is exposed.

Specifically, the strand 11 is a flexible member extending linearly, and the shape of the cross section orthogonal to the extending direction X is circular or substantially circular. The recesses 12 extend along the extending direction X of the wire 11, and in the present embodiment, four recesses 12 are formed on the peripheral surface of the wire 11 at equal angular intervals. Further, the four recesses 12 have the same shape and size. As shown in FIG. 1 (c), the recess 12 extends parallel to the extending direction X of the wire 11. The recess 12 does not extend parallel to the extending direction X of the wire 11, but may extend spirally on the surface of the wire 11.

As shown in FIG. 1 (b), the value of the diameter of the wire 11 is the diameter dimension D, and as shown in FIG. 1 (c), the extension which is the length of the wire 11 of the recess 12 in the extending direction X. The value of the existing dimension is the extending dimension L. The diameter dimension D of the wire 11 is set to the maximum value of the diameter of the wire 11 when the diameter value is not constant over the extending direction of the wire 11.

The extending dimension L of the recess 12 is, for example, a length equal to or larger than the diameter dimension D of the wire 11, and in the present embodiment, it is formed over the entire extending direction (extending length) of the wire 11. , Is formed from one end side to the other end side of the wire 11. The extending dimension L of the recess 12 may be shorter than the extending length of the wire 11, or may be smaller than the diameter D of the wire 11. Further, as shown in FIG. 1B, the recess 12 has a depth dimension H from the surface of the wire 11. The depth dimension H of the recess 12 is, for example, 10% or more of the diameter dimension D of the wire 11. If the depth dimension H of the recess 12 is 10% or more of the diameter dimension D of the wire 11, when the electric wire 1 is used for the electric wire with a terminal and the conductor 13 is sandwiched between the connection terminals, as will be described later. This is because it is considered that the surface of the wire 11 is easily deformed so as to come into contact with the inner surface of the terminal, and the groove (serration) of the connection terminal is likely to bite into the surface of the wire 11. In relation to the connection terminal of the electric wire with a terminal, it is considered that the depth dimension H of the recess 12 of the electric wire 1 is preferably half or more of the thickness (plate thickness) of the connection terminal. Further, if the depth dimension H of the recess 12 is excessive, there is a possibility that the wire 11 may be torn when the electric wire 1 is compressed. Therefore, an upper limit value can be set for the depth dimension H of the recess 12 in relation to the strength of the wire 11, and the depth dimension H of the recess 12 is, for example, 40% of the diameter dimension D of the wire 11. It is as follows.

Further, the cross-sectional area of the conductor 13 (elementary wire 11) of the electric wire 1 in the cross section intersecting the extending direction (arrow X direction) of the electric wire 1 is, for example, 2 mm ² or more. Sectional area of the conductor 13 of the electric wire 1 is preferably ^{3 mm} 2 (sq) or 12 mm ² or less, and more preferably 5 mm ² or more 8 mm ² or less. This is because an electric wire having a conductor cross-sectional area smaller than 3 mm ² is likely to come into contact with the inner surface of the connection terminal when crimp-connected to the connection terminal, and an electric wire having a conductor cross-sectional area exceeding 12 mm ² is used. As a relative relationship between the wire diameter and the wire displacement during crimping (the amount of wire deformation), the wire displacement during compression is larger than that of a wire with a conductor cross-sectional area smaller than 12 mm ^2. This is because there is a risk of breakage. Further, according to the electric wire 1, even if the cross-sectional area of the conductor 13 (wire 11) is increased, it is possible to suppress the deterioration of the flexibility.

In the electric wire 1 according to the present embodiment, the total number of recesses 12 is 4, but the total number of recesses 12 is not limited to this. For example, the total number of recesses 12 is more than twice the total number of strands 11.

Next, with reference to FIGS. 2 and 3, the electric wire 5 with a terminal and the electric wire with a terminal according to the second embodiment of the present invention in which the electric wire 1 configured as described above is crimp-connected to the connection terminal 4. The configuration of the wire harness 10 according to the third embodiment of the present invention having the fifth embodiment will be described. FIG. 2 is a diagram for showing a schematic configuration of an electric wire 5 with a terminal according to a second embodiment of the present invention, and FIG. 2A is a perspective view showing a connection terminal 4 in the electric wire 5 with a terminal. 2 (b) is a perspective view of the electric wire 5 with a terminal, and FIG. 2 (c) is an enlarged cross-sectional view of a crimping portion of the electric wire 5 with a terminal shown in FIG. 2 (b). FIG. 3 is a diagram for showing a schematic configuration of a wire harness 10 according to a third embodiment of the present invention.

As shown in FIGS. 2A and 2B, the electric wire 5 with a terminal according to the second embodiment of the present invention is formed by crimping and connecting the electric wire 1 configured as described above to the connection terminal 4. It is configured. In the electric wire 5 with terminals, the electric wire 1 is compressed and sandwiched and connected to the connection terminal 4 in the radial direction of the wire 11. In the present embodiment, the case where the connection terminal 4 is a female terminal will be illustrated, but the connection terminal 4 has other shapes such as a male connection terminal, a round terminal, and a splice terminal. It may be a terminal.

The connection terminal 4 has a box portion 41 into which a male connection terminal (not shown) can be inserted, a wire barrel portion 42 having a tin-plated film M, and being crimped and crimped to the connection exposed portion 15 of the electric wire 1. It is provided with an insulation barrel portion 43 that is crimped and fixed to the insulating coating portion 14 of the electric wire 1.

A plurality of serrations 44, which are grooves extending in the width direction of the connection terminal 4, are formed on the inner surface to which the connection exposed portion 15 of the wire barrel portion 42 is crimp-connected. The serration 44 is formed so as to bite into the wire 11 in a state where the wire 11 is crimped to the connection terminal 4 at the connection exposed portion 15 by crimping the wire barrel portion 42.

More specifically, the connection exposed portion 15 of the electric wire 1 is positioned between the pair of wire barrel pieces 45 facing each other in the width direction of the wire barrel portion 42 of the connection terminal 4, and the wire barrel piece 45 is bent inward for connection. The exposed portion 15 presses against the wire 11 (conductor 13), the wire 11 is compressed in the radial direction, and the wire 11 is sandwiched between the wire barrel pieces 45. Further, a pair of insulation barrel pieces 46 facing each other in the width direction of the insulation barrel portion 43 are bent inward and pressed against the insulating coating portion 14, and the electric wire 1 is sandwiched between the insulation barrel pieces 46. As a result, the electric wire 1 is crimp-connected at the connection exposed portion 15, and the connection terminal 4 is electrically connected to the electric wire 1. In the electric wire 5 with terminals, the compressibility of the wire 11 compressed by the connection terminal 4 is, for example, 50% to 80%.

As shown in FIG. 2C, when the connected exposed portion 15 is sandwiched between the wire barrel pieces 45, the recess 12 is formed in the wire 11, so that the width of the outer peripheral side of the recess 12 is widened. The wire 11 is deformed following the shape of the wire barrel portion 42, and the surface of the wire 11 comes into close contact with the inner peripheral surface of the wire barrel portion 42. Further, when the connected exposed portion 15 is sandwiched between the wire barrel pieces 45, the serrations 44 bite into the surface of the wire 11, the insulating film such as the oxide film formed on the surface of the wire 11 is broken, and the wire is broken. 11 makes electrical contact with the connection terminal 4 over a wide area. Therefore, good conductivity can be ensured between the connection terminal 4 and the electric wire 1, and the conductive performance of the electric wire 5 with terminals can be improved. Further, the crimping state between the wire 11 and the connection terminal 4 can be maintained satisfactorily.

As shown in FIG. 3, the wire harness 10 can be formed by attaching the electric wire 5 with a terminal configured as described above to the connector housing HC on the female side. The female-side connector housing HC is fitted with a male-side connector housing (not shown) to electrically connect the terminal-attached electric wire 5 to the terminal-attached electric wire mounted on the male-side connector housing.

As described above, according to the electric wire 1, the electric wire 5 with terminals, and the wire harness 10 according to the embodiment of the present invention, the conductive performance can be improved.

Next, a method of forming the recess 12 of the electric wire 1 configured as described above will be described. First, a slit-shaped recess wider than the recess 12 is formed on the surface of the rod-shaped member by passing an aluminum rod-shaped member (core wire) through a hole of a die for cutting (not shown) and pulling it out. A blade that cuts a recess wider than the recess 12 into the surface of the rod-shaped member is arranged inside the hole of the die, and the recess 12 described above is formed on the surface of the rod-shaped member that has passed through the hole of the die. A recess wider than is formed.

Then, a rod-shaped member having a wide recess formed is drawn by passing it through a hole of a die for wire drawing (not shown) to draw a wire, and the formed wide recess is crushed in the circumferential direction. As the strand 11 is formed, the width of the recess becomes smaller and the recess 12 is formed. A blade for cutting a slit (recess) may be arranged in the hole of a die for wire drawing (not shown), and the recess 12 may be formed by drawing while forming the slit. In this case, the shape of the blade may be changed so that the depth of cut of the slit gradually increases in the longitudinal direction of the rod-shaped member.

Next, the first to fifth modifications of the electric wire 1 according to the first embodiment of the present invention described above will be described with reference to FIGS. 4 to 8. In the electric wire 1 according to the first to fifth modifications, the structure of the wire is different from that of the wire 11 described above.

FIG. 4 is a plan view of the electric wire 1 for showing a first modification of the electric wire 1. As shown in FIG. 4, the electric wire 1 according to the first modification has a wire 11a instead of the above-mentioned wire 11, and the wire 11a has a recess 16a, a pair of recesses 16b, and a pair. A recess 16c and a pair of recesses 16d are formed. The recesses 16a to 16d extend parallel to or substantially parallel to the extending direction of the wire 11a. The recess 16a is a slit-shaped recessed portion formed deeper than the radius dimension R of the wire 11a extending (recessing) beyond the center O from the surface of the wire 11a toward the center O of the wire 11a. The pair of recesses 16b have a depth shorter than the radius dimension R of the strands 11a extending orthogonally or substantially orthogonally to the recesses 16a from the surface of the strands 11a toward the center O of the strands 11a. It is a formed slit-shaped concave portion. The pair of recesses 16c are formed on the open end side (upper side in FIG. 4) of the recess 16a with respect to the pair of recesses 16b, from the surface of the wire 11a to the inside of the wire 11a to a depth shorter than the radius dimension R. , A slit-shaped recessed portion extending so as to face each other in parallel or substantially parallel to the recess 16b. The pair of recesses 16d are formed on the opposite side of the pair of recesses 16b from the recess 16c, and face each other line-symmetrically with respect to the recess 16c from the surface of the wire 11a toward the center O of the wire 11a. It is a slit-shaped recessed portion formed shorter than the dimension R of the radius of the wire 11a extending therein. As described above, a total of seven recesses 16a to 16d are formed in the wire 11a.

FIG. 5 is a plan view of the electric wire 1 for showing a second modification of the electric wire 1. As shown in FIG. 5, the electric wire 1 according to the second modification has a wire 11b instead of the above-mentioned wire 11, and the wire 11b is parallel to the extending direction of the wire 11b or Four recesses 17 extending substantially in parallel are formed. As shown in FIG. 5, the recess 17 is a portion recessed in a groove shape from the surface of the wire 11b toward the center O of the wire 11b. The recess 17 does not reach the center O and has a depth dimension H2, and in a cross section orthogonal to the extending direction of the wire 11b, the width narrows from the surface of the wire 11b toward the inside. ing. Further, the recesses 17 are formed at equal angular intervals on the circumference of the wire 11b. The total number of recesses 17 formed in the strands 11b is not limited to the above four.

FIG. 6 is a plan view of the electric wire 1 for showing a third modification of the electric wire 1. As shown in FIG. 6, the electric wire 1 according to the third modification has the wire 11c instead of the above-mentioned wire 11, and the wire 11c is parallel to the extending direction of the wire 11c or Twelve recesses 18 extending substantially in parallel are formed. As shown in FIG. 6, the recess 18 is a portion recessed in a groove shape from the surface of the wire 11c toward the center O of the wire 11c toward the inside. The recess 18 does not reach the center O and has a depth dimension H3, and in a cross section orthogonal to the extending direction of the wire 11c, the width narrows from the surface of the wire 11c toward the inside. ing. The depth dimension H3 of the recess 18 of the wire 11c is longer than the depth dimension H2 of the recess 17 of the wire 11b in the second modification described above. Further, the recesses 18 are formed at equal angular intervals on the circumference of the wire 11c. The total number of recesses 18 formed in the wire 11c is not limited to the above-mentioned twelve.

7 (a) and 7 (b) are views for showing a fourth modification of the electric wire 1. As shown in FIGS. 7A and 7B, the electric wire 1 according to the fourth modification has a wire 11d instead of the wire 11 described above, and the wire 11d has a wire 11d. Eight recesses 19 are formed so as to be inclined with respect to the extending direction of the wire and extend spirally. As shown in FIGS. 7A and 7B, the recess 19 is a portion recessed in a groove shape from the surface of the wire 11d toward the center O of the wire 11d toward the inside. The recess 19 does not reach the center O, has a depth dimension H4, and narrows in width from the surface of the wire 11d toward the inside in a cross section orthogonal to the extending direction of the wire 11d. ing. Further, the recesses 19 are formed at equal angular intervals on the circumference of the wire 11d. The total number of recesses 19 formed in the strands 11d is not limited to the above eight.

The recesses 12, 16a to 16d, 17 to 19 are formed so as to extend continuously from one end side to the other end side in the extending direction X of the strands 11, 11a to 11d. The extending form of the recesses 12, 16a to 16d, 17 to 19 is not limited to this. For example, as shown in FIG. 8, the recesses 12, 16a to 16d, 17 to 19 are formed intermittently from one end side to the other end side in the extending direction X of the strands 11, 11a to 11d. Good. The recesses formed intermittently as shown in FIG. 8 may be formed so as to be inclined with respect to the extending direction X and extend spirally. Further, the disconnection form (pattern) of the concave portion on the surface of each wire may be different or the same.

Next, with reference to FIG. 9, the configuration of the electric wire according to the fourth embodiment of the present invention will be described. FIG. 9 is a diagram for showing a schematic configuration of the electric wire 2 according to the fourth embodiment of the present invention, and FIG. 9A is a perspective view showing the schematic configuration of the electric wire 2; b) is a plan view of the wire 22 for showing the recess 25 in the electric wire 2. Hereinafter, the same reference numerals will be given to the electric wires 1 according to the first embodiment and the same or similar configurations as those of the modified examples thereof, and the description thereof will be omitted.

As shown in FIGS. 9A and 9B, the electric wire 2 according to the fourth embodiment of the present invention includes a conductor 23 formed by twisting a plurality of strands 22 made of aluminum and a conductor. It has an insulating coating portion 24 formed of an insulating material covering 23. The strand 22 is formed with at least one recess 25 extending in the extending direction X of the electric wire 2 and recessed in a slit shape from the surface of the strand 22 toward the inside. The conductor 23 has a two-layer structure, and is formed by twisting six strands 22 around one linearly extending strand 22. The conductor 23 can be made by a conventionally known apparatus by a conventionally known twisting method. The recess 25 can be formed by the same method as the recess 12 described above, and the recess 25 may be formed at the same time in the twisting step of the wire 22, and the recess 25 may be formed at the same time before the twisting step. It may be formed in advance in 22. At the end of the electric wire 2, the conductor 23 is not covered with the insulating coating portion 24, and the connection exposed portion 26 is formed. As will be described later, the connection terminal 4 is crimp-connected to the connection exposed portion 26, which is a portion of the conductor 23 not covered by the insulation coating portion 24, in the electric wire with a terminal.

Specifically, as shown in FIG. 9B, four recesses 25 extend parallel to or substantially parallel to the extending direction of the strands 22 at equal angular intervals on the surface of each strands 22. In addition, the depth dimension H5 of the recess 25 is formed to be smaller than the radius dimension R of the wire 22. In the recess 25, for example, the extending dimension L of the recess 25 is larger than the diameter dimension D of the wire 22, and the depth dimension H5 of the recess 25 is 10% or more of the diameter dimension D of the wire 22. There is. Further, the cross-sectional area of the conductor 23 of the electric wire 2 in the cross section intersecting the extending direction (arrow X direction) of the electric wire 2 is, for example, 2 mm ² or more.

In the electric wire 2 according to the present embodiment, the number of strands 22 is 7, but the number of strands 22 is not limited to this. The number of strands 22 is, for example, 19 or less. Further, according to the electric wire 2, even if the cross-sectional area of the conductor 23 (wire 22) is increased, it is possible to suppress the deterioration of the flexibility. Therefore, it is possible to suppress the deterioration of the flexibility of the electric wire while reducing the number of strands. Moreover, since the number of strands is small, it is possible to facilitate the manufacture of electric wires. The cross-sectional area of the conductor 23, which is the total cross-sectional area of the strands 22, is 2 mm ² or more, but the cross-sectional area of the conductor 23 is preferably 3 mm ² (sq) or more and 12 mm ² or less, and 5 mm ² or more. It is more preferably 8 mm ² or less. When the cross-sectional area of the conductor is smaller than 3 mm ^{2, the} wire is thin, and when the conductor is crimp-connected to the connection terminal 4 described above, the twisted wires come into contact with each other on the surface and are connected to the inner surface of the connection terminal 4. For electric wires that are easily deformed so that the surfaces of the wires come into contact with each other and the cross-sectional area of the conductor exceeds 12 mm ² , the relative relationship between the wire diameter and the wire displacement (the amount of wire deformation) during crimping is This is because the displacement of the wire during compression is larger than that of the wire of the electric wire whose cross-sectional area is smaller than 12 mm ^2, and there is a risk of breakage.

Next, with reference to FIG. 10, regarding the configuration of the electric wire 6 with a terminal according to the fifth embodiment of the present invention formed by crimp-connecting the electric wire 2 configured as described above to the connection terminal 4 described above. explain. FIG. 10 is a diagram for showing a schematic configuration of an electric wire 6 with a terminal according to a fifth embodiment of the present invention, and FIG. 10A is a perspective view of the electric wire 6 with a terminal, FIG. 10 (a). b) is an enlarged cross-sectional view of a crimped portion of the electric wire 5 with a terminal.

As shown in FIGS. 10A and 10B, the electric wire 6 with a terminal according to the fifth embodiment of the present invention has the connection terminal 4 and the electric wire 5 with a terminal configured as described above. It is made by crimping and connecting to the electric wire 2. Further, a wire harness can be created by attaching the terminal-attached electric wire 6 configured as described above to the female side connector housing HC in the same manner as the terminal-attached electric wire 5 described above (see FIG. 3).

As described above, also in the wire harness 10 including the electric wire 2 according to the fourth embodiment of the present invention, the electric wire 6 with a terminal according to the fifth embodiment of the present invention, and the electric wire 6 with a terminal, the above-mentioned book Similar to the electric wire 1 according to the first embodiment of the present invention, the electric wire with terminals 5 according to the second embodiment of the present invention, and the wire harness 10 according to the third embodiment of the present invention, the conductive performance is exhibited. Can be improved. Specifically, in the electric wire 6 with terminals, the wire 22 is deformed along the shape of the connection terminal 4 that has been crushed and deformed, and the insulating coating on the surface of the wire 22 is broken, so that the adjacent wires are adjacent to each other. A good electrically connecting contact can be obtained between the wires 22, and the conductive performance of the terminal-equipped electric wire 6 can be improved. In conventional electric wires, when crimping an electric wire to a terminal, the wire that comes into contact with the terminal can be conductive, but the wire that is only in contact with each other cannot be conductive, and the conductivity performance may be low. there were. In particular, when the number of strands increases as the diameter of the electric wire increases, the number of strands in contact with each other increases, so that the conductive performance may not be sufficient. On the other hand, in the electric wire 6 with a terminal and the wire harness 10 provided with the electric wire 2 according to the fourth embodiment of the present invention, the connection terminal 4 in the crimp connection portion is formed by forming the recess 25 in the wire 22. Since the wire 22 is flexibly deformed along the shape and the insulating film is broken, the conductive performance can be improved.

For this reason, in the case of conventional electric wires, in order to improve the conductive performance of the wires that are only in contact with each other, it is necessary to improve the conductivity between the wires by soldering the wires to each other. However, according to the electric wire 2 according to the fourth embodiment of the present invention, the conductive performance can be improved without such a soldering process.

The shape of the recess 25 described above is not limited to the shape shown in FIGS. 9A and 9B. Next, a modified example of the electric wire 2 will be described with reference to FIGS. 11 to 14. The electric wire 2 according to each modification has recesses 25a to 25e instead of the recesses 25 described above.

FIG. 11 is a plan view of the electric wire 2 according to the first modification. As shown in FIG. 11, the conductor 23a in the electric wire 2 according to the first modification is obtained by twisting a wire 22b having a circular cross section with a wire 22b having a rectangular cross section, a substantially rectangular cross section, or a substantially triangular cross section. It is formed and consists of one strand 22a arranged in the center of the conductor 23a and eight strands 22b arranged concentrically from the center O of the one strand 22a.

In one wire 22a, three recesses 25a recessed in a slit shape from the surface of the wire 22a toward the center O of the wire 22a toward the inside are formed at equal angles on the circumference of the wire 22a. It is formed. Further, of the eight strands 22b, each of the four strands 22b has one recess 25b recessed in a slit shape from the surface of the strand 22b toward the center O of the strand 22a toward the inside. It is formed. The strands 22b on which the recesses 25b are formed are arranged vertically and horizontally at equal intervals of the strands 22a.

FIG. 12 is a plan view of the electric wire 2 according to the second modification. As shown in FIG. 12, the conductor 23b is formed by twisting two strands 22c. The wire 22c has a substantially triangular or mountain-shaped cross section, and each wire 22c is formed with a recess 25c formed in a groove shape that is recessed inward from a protruding portion, and a conductor 23b is formed. In, the strands 22c are arranged so that the recess 25c extends toward the center C of the conductor 23b. Further, in the conductor 23b, the pair of strands 22c are formed so as to form a gap on the outer side (outer peripheral side) and come into contact with each other.

FIG. 13 is a plan view of the electric wire 2 according to the third modification. As shown in FIG. 13, the conductor 23c is formed by twisting a single wire 22d having a 10 o'clock cross section (x-shaped) with wires 22e and 22f having a rectangular cross section, a substantially rectangular shape, or a substantially triangular cross section. One wire 22d arranged in the center of the conductor 23c and four wires 22e arranged in the vertical and horizontal directions in FIG. 13 at equal angular intervals around one wire 22d. , It is composed of four strands 22f arranged between the strands 22e.

The strand 22d is formed with four grooves 27, which are grooves extending in the extending direction of the strand 22d. The strand 22e is formed with a recess 25d formed in a slit shape that is recessed inward from the surface on the outer peripheral side of the wide width, so that the recess 25d extends toward the center C of the conductor 23c in the conductor 23c. , The wire 22e is arranged. Further, in the conductor 23c, the wire 22e is arranged so that the end portion on the inner peripheral side is housed in the groove 27 of the wire 22d and has a cross shape at equal angular intervals.

FIG. 14 is a plan view of the electric wire 2 according to the fourth modification. As shown in FIG. 14, the conductor 23d is formed by twisting five strands with a circular cross section 22g, six strands with an elliptical cross section 22h, and two strands with a circular cross section 22i. There is. The diameter of the wire 22i is smaller than the diameter of the wire 22g. In the conductor 23d, one wire 22g is arranged in the center of the conductor 23d, and the four wires 22g are sandwiched between the two pairs of adjacent wires 22g facing each other. Is placed. The two strands 22h are arranged so as to sandwich the central strand 22g between the two pairs of strands 22g, and one strand 22i is a pair of strands outside each pair of strands 22g. It is arranged so as to be in contact with both strands 22g of the wire 22g. Further, a pair of strands 22h are arranged so as to sandwich each strand 22i from the outside.

Similar to the above-mentioned strand 22g, the strand 22g is formed with four recesses 25e recessed in a slit shape from the surface of the strand 22g toward the center O of the strand 22g inward at equal angle intervals. ing.

The form of the strands 22, 22a to 22i in the electric wire 2 is not limited to the above-mentioned one, and may be the same as the above-mentioned strands 11a to 11d.

The electric wires 1 and 2, the electric wires 5 and 6 with terminals, and the wire harness 10 according to the embodiment of the present invention have been described above. It is not limited to the electric wires 5 and 6 with terminals and the wire harness 10, and includes all aspects included in the concept of the present invention and the scope of patent claims. In addition, each configuration may be selectively combined as appropriate so as to achieve at least a part of the above-mentioned problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above embodiment can be appropriately changed depending on the specific usage mode of the present invention. The configuration of each part can be replaced with an arbitrary configuration having the same function.

The shapes of the recesses 12, 16a to 16d, 17, 18, 19, 25, 25a to 25e of the electric wires 1 and 2 in the above-described embodiment of the present invention are not limited to the above-described shapes. For example, the direction, number, and position of the recesses from the surface of the wire to the inside can be changed as appropriate. For example, the total number of recesses may be twice or more the total number of strands, may be more than 19, or may be 19 or less.

Further, the number and arrangement of the strands in the above-described embodiment of the present invention are not limited to the numbers and arrangements shown, and can be changed as appropriate.

1, Electric wire 4 Connection terminal 5, 6 Electric wire with terminal 10 Wire harness 11, 11a to 11d, 22, 22a to 22i Wires 12, 16a to 16d, 17, 18, 19, 25, 25a to 25e Recesses 13, 23 , 23a-23d Conductors 14, 24 Insulation coatings 15, 26 Connection exposed 41 Box 42 Wire barrel 43 Insulation barrel 44 Serration

Claims (13)

It is an electric wire with a terminal
With terminals
Equipped with electric wires,
The electric wire is an electric wire having one or a plurality of conductive strands.
The strand has a cross-sectional shape orthogonal to the extending direction of any of a circular shape, a rectangular shape, a substantially rectangular shape, a substantially triangular shape, and a mountain shape, and has a slit-shaped recess recessed from the surface toward the inside. at least one has,
The electric wire with a terminal is characterized in that the electric wire is compressed, sandwiched and connected to the terminal in the radial direction of the wire. The electric wire with a terminal according to claim 1, wherein the recess extends along the extending direction of the wire. The electric wire with a terminal according to claim 1 or 2, wherein the recess extends in the range of the wire having a length equal to or greater than the value of the diameter of the wire in the extending direction of the wire. The terminal-equipped electric wire according to any one of claims 1 to 3, wherein the depth of the recess is a value of 10% or more of the value of the diameter of the wire. The electric wire with a terminal according to any one of claims 1 to 4, wherein the total number of the recesses is at least twice the total number of the strands. The electric wire with a terminal according to any one of claims 1 to 5, wherein the total number of the recesses is more than 19. The electric wire with a terminal according to any one of claims 1 to 6, wherein the strand is formed of aluminum or an aluminum alloy. The terminal-equipped electric wire according to any one of claims 1 to 7, wherein the cross-sectional area of the conductor formed from the strand of the electric wire in the cross section intersecting the extending direction of the electric wire is 2 mm ² or more. .. The electric wire with a terminal according to any one of claims 1 to 8, wherein only one of the strands is provided. The electric wire with a terminal according to any one of claims 1 to 8, wherein the total number of the strands is 19 or less. The terminal according to any one of claims 1 to 10, wherein the compressibility of the conductor formed from the wire of the electric wire in the portion sandwiched by the terminals is 50 to 80%. Electrical wire. The terminal-equipped electric wire according to any one of claims 1 to 11, wherein the terminal is formed with a plurality of grooves in a portion sandwiching the electric wire. A wire harness comprising the electric wire with a terminal according to any one of claims 1 to 12 .

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