JP5080291B2 - Crimp terminal, electric wire with terminal, and manufacturing method thereof - Google Patents

Description

  The present invention relates to a crimp terminal crimped to an end of an electric wire routed in an automobile, etc., an electric wire with a terminal having the crimp terminal, and a method of manufacturing the same.

  Conventionally, a crimping technique is frequently used as a means for attaching a terminal to an end of an insulated wire. This crimping is performed by caulking a conductor barrel formed on the terminal in advance to the end of the conductor of the insulated wire using a mold.

  However, with this crimping technique, it is difficult to set the crimp height of the conductor barrel. If the crimping height is set small, the advantage that the contact resistance between the conductor barrel and the conductor of the electric wire is reduced can be obtained. On the other hand, the reduction rate of the conductor cross-sectional area is high, so that the mechanical strength, particularly for shock loads, is reduced. There arises a disadvantage that the tensile strength (more specifically, the strength with which the crimp terminal holds the electric wire) is lowered. On the contrary, when the crimping height is set large, the mechanical strength can be kept high, but there is a disadvantage that the contact resistance between the conductor barrel and the conductor of the electric wire is increased.

  In particular, in recent years, the use of aluminum or an aluminum alloy as a material for a conductor contained in an electric wire has been studied, and setting of the crimping height has become extremely difficult for the use. Specifically, an oxide film that causes a decrease in contact resistance is easily formed on the surface of the aluminum or aluminum alloy, and in order to sufficiently reduce the contact resistance regardless of the formation of the oxide film, the crimping height is lowered. There are circumstances that must be set. Therefore, it is not easy to set and manage the crimping height so as to satisfy both the mechanical strength and the contact resistance of the electric wire with terminal having a conductor made of aluminum or aluminum alloy.

Therefore, Patent Document 1 discloses a technique for simultaneously forming a portion with a high crimping height and a portion with a small crimping height on the conductor barrel. The portion having a large crimping height is formed at the tip side portion of the conductor and contributes to maintenance of mechanical strength. On the other hand, the portion where the crimping height is small contributes to a decrease in contact resistance.
JP-A-2005-50736

  In the electric wire with a terminal described in Patent Document 1, there is a discontinuous step between a portion having a large crimping height and a portion having a small crimping height. As this step becomes larger, the terminal is more likely to be damaged such as a crack. In addition, it is practically difficult to manufacture the electric wire with a terminal having a large step with a single crimping die, and in practice, different crimping die must be used for the portions having different crimping heights. The management is extremely troublesome.

  As a means for increasing the strength with which the terminal holds the electric wire and effectively reducing the contact resistance, as shown in, for example, Japanese Patent Laid-Open No. 10-125362, the crimp terminal is caulked to the conductor of the electric wire terminal. Forming serrations composed of a plurality of concave grooves arranged in a direction parallel to the axial direction is performed on the inner surface of the conductor crimping portion. This serration increases the contact area between the conductor crimping portion and the conductor in the crimp terminal, and the edge formed by the serration, particularly the edge extending in the direction perpendicular to the terminal axis direction, bites into the conductor. The holding strength of the conductor by the conductor crimping portion is increased, and the contact resistance is also reduced. However, when crimping with high compression is performed as described above, plastic deformation of the terminal crimping portion in the crimping terminal (particularly, extension in the axial direction and reduction in wall thickness) is significant. If such a ditch is formed, there is a possibility that a break may occur at a portion where the ditch is formed, that is, at a locally thin portion. Therefore, when the concave portion such as the serration is formed in the terminal crimping portion, the lower limit of the compression rate for the crimping, that is, the limit setting for high compression is significantly limited.

  In view of such circumstances, the present invention provides a crimping height of the crimping terminal with respect to the electric wire in the axial direction while forming a recess in the crimping part of the crimping terminal to promote the biting of the conductor crimping part into the conductor. It is an object of the present invention to provide a technique that makes it possible to ensure both the mechanical strength of a terminal-attached electric wire and the reduction in contact resistance between the electric wire and a crimp terminal without greatly changing the electric resistance.

As means for solving the above-mentioned problems, the present invention includes an electrical connection portion that is fitted and electrically connected to a counterpart terminal, and a conductor crimping portion that is crimped to the terminal of the electric wire from which the conductor is exposed at the terminal. The conductor crimping portion has a uniform thickness in the axial direction of the crimp terminal, and can be crimped to the conductor so as to embrace the conductor of the terminal The inner surface of the conductor crimping portion is a recess for forming an edge that bites into the conductor, the first recess being continuous in a direction perpendicular to the axial direction of the terminal, and an edge that bites into the conductor A plurality of second portions that are located closer to the electrical connection portion than the first recess and are divided in a direction perpendicular to the axial direction of the terminal and spaced apart from each other in the direction. Formed with recesses Is the second recesses, respectively disposed in a plurality of rows arranged in the terminal axis direction, positions of the concave portions formed in each of the columns of the column relative to the position of the recess provided in the column adjacent to the column It is shifted in the direction .

  Further, the crimp terminal according to the present invention is a recess for forming an edge that bites into the conductor on an inner surface of the conductor crimping portion, and a first recess that is continuous in a direction perpendicular to the axial direction of the terminal; A recess for forming an edge that bites into the conductor, the recess being closer to the electrical connecting portion than the first recess and having a maximum depth smaller than the maximum depth of the first recess. Two recesses may be formed.

  Here, the “thickness” of the conductor crimping portion means the thickness of the portion where the concave portion is not formed. Therefore, “having a uniform thickness in the axial direction of the crimp terminal” does not include a local reduction in thickness due to the formation of the recess.

  If it is such a crimp terminal, the terminal is formed without greatly changing the crimping height of the crimping terminal with respect to the electric wire in the axial direction while forming a recess for reducing the contact resistance with the conductor in the crimping part of the crimping terminal. It is possible to achieve both the securing of the mechanical strength of the attached wire and the reduction of the contact resistance between the wire and the crimp terminal. Specifically, if the conductor crimping part is deformed so that the crimping height of the conductor crimping part is substantially uniform in the axial direction of the crimping terminal as in the case of a normal crimping terminal, The first pressure-bonding portion in which the first recess is formed extends in the axial direction and decreases in thickness than the second pressure-bonding portion in which the second recess is formed, so that the first pressure-bonding portion is reduced. The second crimping portion is crimped to the conductor with higher compression than the portion.

  Therefore, the first concave portion increases the force for holding the conductor even if the edge is bitten into the conductor, and the compression of the conductor by the first crimping portion is suppressed, and the first crimping portion is also provided. And the contact resistance between the conductors is reduced. In addition, the suppression of compression at the first crimping portion prevents the terminal from being broken at the portion where the first recess is formed.

  On the other hand, the second recess is divided in a direction perpendicular to the terminal axis direction and separated from each other, or has a maximum depth smaller than the recess formed in the first pressure-bonding portion, and is thus caused by the recess. It is possible to press the conductor with high compression as a result by suppressing the elongation of the second pressure-bonding portion where the second concave portion is formed while suppressing breakage.

  That is, in this invention, even if it does not give a difference in the crimping height, it is higher than the first crimping portion in which the first recess is formed due to the difference in shape between the first recess and the second recess. By compression, it is possible to crimp the second crimping part formed with the second recess to the conductor, thereby ensuring the mechanical strength of the terminal-attached electric wire and between the electric wire and the crimping terminal. A reduction in contact resistance can be achieved. Moreover, in the second crimping portion, although the biting effect due to the recess is lower than that of the first crimping portion, it is possible to suppress or prevent the breakage of the terminal in the recess during crimping under high pressure, On the other hand, a sufficient biting effect can be obtained by the recess in the first crimping portion.

As described above , in the crimp terminal in which the second recess is divided in the direction orthogonal to the terminal axis direction and separated from each other in the direction, the effect of biting into the conductor by the recess is present in the region where the recess does not exist. In the present invention, the divided concave portions are arranged in a plurality of rows arranged in the terminal axis direction, and the positions of the concave portions provided in the respective rows are provided in the rows adjacent to the rows. since that is deviated in the direction of the column relative to the position of the recess, the direction perpendicular to the terminal axis direction, it is possible to equalize the variations in the biting effect.

  The conductor crimping portion includes a base portion extending in the axial direction from the electrical connection portion, and a metal plate extending in a direction intersecting the axial direction from the base portion, and is bent so as to embrace the conductor exposed at the end of the electric wire. What has the conductor barrel processed is suitable. In this case, both the first recess and the second recess may be formed on at least one inner surface of the base and the conductor barrel.

  Moreover, this invention is an electric wire with a terminal which has the electric wire which a conductor exposes in a terminal, and the said crimp terminal crimped to the terminal, Comprising: The conductor crimping part of the said crimp terminal is with respect to the conductor of the terminal of the said electric wire. The conductor crimping part is deformed so that the crimping height is substantially uniform in the axial direction of the crimping terminal, and the first recess is formed in the conductor crimping part. The first pressure-bonding portion is more compressed than the first pressure-bonding portion because the first pressure-bonding portion extends in the axial direction and decreases in thickness than the second pressure-bonding portion in which the second recess is formed. The second crimping part is crimped to the conductor.

  In this electric wire with terminal, the suppression of the compression in the first crimping portion in the conductor crimping portion and the first recess formed in the first crimping portion hold the conductor holding force by the conductor crimping portion high. The fact that the second concave portion is crimped to the tip side portion of the conductor with high compression reduces the contact resistance between them. Therefore, the present invention is particularly effective when high pressure compression bonding, that is, low pressure compression bonding is required. For example, when the conductor of the electric wire is formed of aluminum or an aluminum alloy on which an oxide film is easily formed, a compression ratio of, for example, about 40 to 70% is required in order to break the oxide film and reduce the contact resistance. In this case, the present invention is extremely effective.

  Further, the present invention is a method for producing a terminal-attached electric wire having an electric wire from which a conductor is exposed at a terminal and a crimp terminal crimped to the terminal, wherein the terminal is formed from a metal plate. And crimping the conductor crimping portion of the crimp terminal to the conductor of the terminal of the electric wire from the outside, and using the mold having a uniform crimp height in the axial direction of the crimp terminal, A crimping step of crimping the conductor of the terminal from the outside, wherein in the crimping step, the first crimping portion in which the first recess is formed in the conductor crimping portion forms the second recess. The conductor crimping in which the second crimping part is crimped to the conductor with higher compression than the first crimping part by extending in the axial direction and reducing the thickness of the second crimping part. Higher compression than the first crimping part Serial second crimp portion is to crimped to the conductor.

  As described above, according to the present invention, even if the crimping height of the conductor crimping portion in the crimping terminal is not particularly changed in the axial direction, the first recess is formed in the conductor crimping portion. The pressure-bonding portion of the second pressure-bonding portion extends in the axial direction and decreases in thickness as compared with the second pressure-bonding portion in which the second concave portion is formed. It is possible to crimp the portion to the conductor, thereby ensuring both the mechanical strength of the electric wire with terminal and a decrease in contact resistance between the electric wire and the crimp terminal. Further, the first pressure-bonding portion in which the first recess is formed can ensure a high holding strength of the conductor due to the suppression of the compression and the effect of promoting biting by the first recess. The second recess formed in the second crimping portion that is crimped to the conductor with higher compression than the first crimping portion is divided in a direction orthogonal to the terminal axis direction, or shallower than the first crimping portion. Therefore, the second crimping portion can be crimped to the tip side portion of the conductor with the high compression while avoiding breakage of the terminal due to the formation of the recess.

  A preferred embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a terminal-attached electric wire manufactured in the first embodiment of the present invention. The electric wire with terminal has an electric wire 20 and a crimp terminal 10. The electric wire 20 includes a conductor 22 and an insulating coating 24 that covers the conductor 22 from the outside in the radial direction. The conductor 22 is exposed by partially removing the insulating coating 24 at the terminal. The crimp terminal 10 is crimped to the end of the electric wire 20.

  The material of the conductor 22 is not particularly limited, and various materials can be set in addition to commonly used copper and copper alloys. However, the present invention is particularly effective for the case where an oxide film is easily formed on the surface, such as aluminum or aluminum alloy, and high compression is required for pressure bonding.

  This electric wire with terminal is manufactured by the following terminal molding process and crimping process.

1) Terminal shaping | molding process In this process, the crimp terminal 10 as shown in FIG.2 and FIG.3, ie, the crimp terminal 10 before crimping to the terminal of an electric wire, is shape | molded. This forming is performed by a step of punching out a terminal original plate as shown in FIG. 2 from a metal plate and a step of bending the terminal original plate in the same manner as a normal terminal.

  The said crimp terminal 10 has the electrical connection part 12 and the electric wire crimp part 14 in the front and back like the conventional terminal. In this embodiment, the electrical connection portion 12 is female and is formed into a box shape into which a male terminal (not shown) can be inserted. The wire crimping portion 14 includes a base portion 15 extending rearward along the axial direction from the electrical connecting portion 12, and a pair of left and right conductor barrels extending from the base portion 15 in a direction intersecting the axial direction (a direction orthogonal to the drawing). 16 and a pair of left and right insulation barrels 18 extending substantially parallel to the conductor barrels 16. The two conductor barrels 16 have a U-shaped front shape as shown in FIG. 2, and the two insulation barrels 18 have the same shape.

  Each of the conductor barrels 16 has an inner side surface 17 that comes into close contact with the conductor 22 of the electric wire 20 in accordance with the bending process. The conductor barrel 16 and the portion of the base 15 to which the conductor barrel 16 is connected constitute a conductor crimping portion. There are no steps on the inner surface and the outer surface of the conductor crimping portion, and the plate thickness is uniform throughout. However, a first recess 13a and a second recess 13b, which will be described later, are formed on the inner surface 17, and the portions are locally thin.

  Of the wire crimping portion 14, the region to be crimped to the base side portion of the conductor 22 includes a first crimping portion 14 a in which a plurality of first recesses 13 a are formed on the inner side surface 17. The region to be crimped to the tip side portion of the conductor 22 includes a second crimping portion 14b in which a plurality of second recesses 13b are formed on the inner surface thereof. Each of the recesses 13a and 14b forms an edge extending in the terminal width direction before and after the recesses 13a and 14b. The edge bites into the conductor 22 when the crimp terminal 10 is crimped, thereby increasing the holding strength of the conductor 22 by the crimp terminal 10 and breaking the oxide film formed on the surface of the conductor 22. Decrease in the contact resistance between 22 and the crimp terminal 10 is promoted.

  Of the recesses 13 a and 13 b, the first recess 13 a is formed on the inner surface of the base 15. Each of the first recesses 13a is a narrow groove extending continuously in a direction orthogonal to the axial direction of the terminal, that is, in the width direction of the terminal. These first recesses 13a are arranged in a plurality of rows parallel to each other in the axial direction of the terminal (see FIG. In the example, it is provided over two rows).

  The second recesses 13 b are arranged in a region straddling the inner side surfaces of the left and right conductor barrels 16 and the inner side surface of the base 15 sandwiched between the conductor barrels 16. Each of the second recesses 13b has a small rectangular shape and is arranged over a plurality of front and rear rows (two rows in the figure). In each row, a plurality of second recesses 13b are spaced apart from each other in the width direction of the terminal, and the position of the second recess 13b in the front row and the position of the second recess 13b in the rear row are the terminal width. The direction is shifted by a half pitch. That is, these second recesses 13b are arranged in a staggered manner.

  This arrangement avoids breakage of the crimp terminal 10 when the first crimp part 14a is crimped as described later, and suppresses the elongation of the first crimp part 14a to lower the compression rate ( That is, the degree of compression is increased). That is, since the thickness of the metal plate constituting the wire crimping portion 14 is locally small at the portion where the recess is formed, and the portion is particularly easily broken and easily stretched, the recess is dispersed in the terminal width direction. Thus, the crimping terminal 10 is avoided from being divided in the terminal axis direction, and the elongation in the same direction is suppressed.

  In addition, about the maximum depth of both the recessed parts 13a and 13b, you may make the 1st recessed part 13a deeper, but you may make both recessed parts 13a and 13b the same depth mutually.

2) Crimping step In this step, the end of the electric wire 20 is set on the base 15 of the electric wire crimping portion 14, and the conductor barrel 16 and the insulation barrel 18 are in such a state as a normal mold as shown in FIG. By caulking with the base 28 and the mold 30, the electric wire crimping portion 14 including both the barrels 16 and 18 is crimped to the conductor 22 at the end of the electric wire 20 and the insulating coating 24 immediately behind it. More specifically, the crimp terminal 10 and the terminal of the electric wire 20 are placed on the mold base 28, and the mold 30 having the pressing surface 32 corresponding to the shape after crimping is lowered on the mold base 28. The barrels 16 and 18 are bent so as to embrace the conductor 22 and the insulating coating 24, respectively.

  Here, the pressing surface 32 of the mold 30 has a shape having a uniform height in the terminal axis direction. Therefore, the crimping height H of the conductor barrel 16 after crimping is also substantially uniform in the same direction (FIGS. 7A and 7B). However, at the time of the crimping, the extension of the first crimping portion 14a in which the first recess 13a continuous in the terminal width direction is formed is not continuous (that is, divided) in the second recess 14a. Is larger than the elongation of the second crimping portion 14b formed, and accordingly, the thickness of the second crimping portion 14b is smaller than the thickness of the first crimping portion 14a. As shown in FIGS. 6 and 7, the compression rate of the conductor 22 (at the tip side portion) by the second crimping portion 14b is the compression rate of the conductor 22 (at the root side portion) by the first crimping portion 14a. Lower than. Therefore, crimping by high compression at the tip end portion of the conductor 22 effectively reduces the contact resistance between the conductor 22 and the conductor barrel 16, while the relative compression of the base portion of the conductor 22 is reduced. Suppression makes it possible to ensure a high tensile strength of the electric wire with terminal, more specifically, a high holding strength of the conductor 22 by the conductor barrel 16. That is, it is possible to achieve both reduction in contact resistance and securing high mechanical strength.

  In addition, the first concave portion 13a formed on the inner surface of the first crimping portion 14a to be crimped with a relatively low compressive force is continuous in the terminal width direction, and is secondly crimped with high compression. Since the second recess 13b formed on the inner surface of the crimping portion 14b is divided in the terminal width direction and separated from each other in the same direction, the first crimping portion 14a is formed by the first recess 13a. While enjoying a sufficient biting effect, it is possible to avoid the occurrence of breakage due to the high pressure compression (low compression ratio) in the second pressure bonding portion 14b.

  Specifically, since the first recess 13a formed in the first crimping portion 14a is continuous in the terminal width direction, it is possible to form an edge continuous in the same direction. A sufficient biting effect can be exhibited over a region continuous in the terminal width direction. Moreover, since the degree of compression at the first crimping portion 14a is lower than the degree of compression at the second crimping portion 14b, the formation of the recess 13a is formed even if the first recess 13a is continuous in the terminal width direction. It is possible to avoid breakage of the terminal at the location.

  On the other hand, since the 2nd recessed part 13b formed in the said 2nd crimping | compression-bonding part 14b is intermittently arranged in the terminal width direction (namely, disperse | distributed in the same direction), the said 2nd crimping | compression-bonding is carried out. Even if the high pressure compression is performed at the portion 14b, the crimp terminal 10 is hardly broken. For example, when the conductor 22 is made of aluminum or an aluminum alloy, the second pressure-bonding portion 14b has a low value of about 40% to 70% in order to break down the oxide film formed on the surface and reduce the contact resistance. Although a compression ratio may be required, even in this case, it is possible to avoid breakage at the second crimping portion 14b.

  Further, as in this embodiment, a plurality of second recesses 13b provided in the second crimping part 14b are respectively arranged in a plurality of rows arranged in the terminal axis direction, and the recesses provided in the respective rows are arranged. The fact that the position is shifted in the direction of the row with respect to the position of the recess provided in the row adjacent to the row (that is, arranged in a staggered manner) means that the second recess 13b is intermittent in the terminal width direction. In spite of the arrangement, the biting effect in the terminal width direction can be made uniform.

  The first recess 13 a and the second recess 13 b may be formed on at least one inner surface of the base 15 and the conductor barrel 16. For example, as shown in FIGS. 8 and 9 as the second embodiment, in addition to the second recess 13b, the first recess 13a is also formed in a region straddling the base 15 and the two conductor barrels 16. It may be.

  The arrangement of the second recesses 13b can be changed as appropriate. For example, as shown in FIGS. 10 and 11 as the third embodiment, a plurality of second recesses 13b arranged in the terminal width direction may be densely arranged in the terminal axis direction. That is, the plurality of rectangular second recesses 13b may be formed so as to form a so-called checkered pattern. Alternatively, as shown in FIGS. 12 and 13 as the fourth embodiment, a plurality of second recesses 13b may be aligned vertically and horizontally.

  A fifth embodiment of the present invention is shown in FIGS. Here, the second concave portion 13b located on the front side (the electrical connection portion 12 side shown in FIG. 1) of the first concave portion 13a is a long length that is continuous in the terminal width direction like the first concave portion 13a. It is formed in a groove shape. However, the depth dimension of the second recess 13b is set to be smaller than the depth dimension of the first recess 13a.

  Also in this embodiment, since the depth dimension of the second recess 13b is suppressed, the axial extension at the time of crimping of the second crimping part 14b in which the second recess 13b is formed is the first. Therefore, the second crimping portion 14b is crimped to the conductor 22 at a higher compression than the first crimping portion 14a. . In addition, since the thickness dimension of the first crimping part 14a is ensured by the small depth dimension of the first recess 13a, the second crimping part 14b is fractured by being crimped with high compression. Is effectively suppressed. On the other hand, in the first crimping portion 14a having a relatively low degree of compression, a sufficient depth dimension is given to the first recess 13a formed therein, thereby obtaining a high biting effect by the first recess 13a. be able to.

  Further, as shown in the first embodiment, the first recess 13a is continuous in the terminal width direction, and the second recess 13b is divided in the terminal width direction and separated from each other in the same direction. However, if the depth dimension of the first recess 13a is set larger than the depth dimension of the second recess 13b, the effect of the present invention becomes more remarkable.

  In addition, the specific depth dimension of each recessed part is suitably set based on the thickness and material of the metal plate which comprises the crimp terminal 10, the planar shape and arrangement | sequence of the said recessed part, the compression rate in each crimping part, etc. That's fine. In general, when the thickness of the metal plate is 0.25 mm, the depth of the first recess 13a is preferably about 0.05 mm, and the depth of the second recess 13b is preferably about 0.03 mm.

  In addition, when there are a plurality of first recesses 13a and a plurality of second recesses 13b, the depth dimensions of the first recesses 13a may not be the same as each other. Similarly, the depths of the second recesses 13b may be the same. The dimension may not be the same. Moreover, the depth dimension of each recessed part may not be constant over the said recessed part whole region. In that case, the maximum depth of the first recess may be larger than the maximum depth of the second recess.

It is a side view of the electric wire with a terminal concerning a 1st embodiment of the present invention. It is an expanded view of the crimp terminal which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the shape after shaping | molding of the crimp terminal shown by FIG. It is a front view which shows the crimping | compression-bonding process for manufacturing the said electric wire with a terminal. It is a perspective view which shows the crimping | compression-bonding part of the said electric wire with a terminal. It is a cross-sectional side view of the said crimping | compression-bonding part. (A) is the 7A-7A sectional view taken on the line of FIG. 6, (b) is the 7B-7B sectional view taken on the line of FIG. It is an expanded view of the crimp terminal which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the shape after shaping | molding of the crimp terminal shown by FIG. It is an expanded view of the crimp terminal which concerns on the 3rd Embodiment of this invention. It is a perspective view which shows the shape after shaping | molding of the crimp terminal shown by FIG. It is an expanded view of the crimp terminal which concerns on the 4th Embodiment of this invention. It is a perspective view which shows the shape after shaping | molding of the crimp terminal shown by FIG. It is an expanded view of the crimp terminal which concerns on the 5th Embodiment of this invention. It is a perspective view which shows the shape after shaping | molding of the crimp terminal shown by FIG. It is AA sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Crimp terminal 12 Electrical connection part 13a 1st recessed part 13b 2nd recessed part 14a 1st crimping part 14b 2nd crimping part 15 Base 16 Conductor barrel 17 Inner side surface of conductor crimping part 20 Electric wire 22 Conductor 24 Insulation coating

Claims (7)

A crimping terminal having an electrical connection part fitted and electrically connected to the terminal of the other party, and a conductor crimping part crimped to the terminal of the electric wire where the conductor is exposed at the terminal,
The conductor crimping portion has a uniform thickness in the axial direction of the crimp terminal, and has a plate shape that can be crimped to the conductor so as to embrace the conductor of the terminal,
A concave portion for forming an edge that bites into the conductor and a first concave portion that continues in a direction orthogonal to the axial direction of the terminal and an edge that bites into the conductor are formed on the inner side surface of the conductor crimping portion. A plurality of second recesses that are located closer to the electrical connection portion than the first recess, are divided in a direction orthogonal to the axial direction of the terminal and are spaced apart from each other in the direction. Formed ,
The second recesses are respectively arranged in a plurality of rows arranged in the terminal axis direction, and the positions of the recesses provided in each row are in the direction of the rows with respect to the positions of the recesses provided in the row adjacent to the row. A crimp terminal characterized by being displaced . A crimping terminal having an electrical connection part fitted and electrically connected to the terminal of the other party, and a conductor crimping part crimped to the terminal of the electric wire where the conductor is exposed at the terminal,
The conductor crimping portion has a uniform thickness in the axial direction of the crimp terminal, and has a plate shape that can be crimped to the conductor so as to embrace the conductor of the terminal,
A concave portion for forming an edge that bites into the conductor and a first concave portion that continues in a direction orthogonal to the axial direction of the terminal and an edge that bites into the conductor are formed on the inner side surface of the conductor crimping portion. And a second recess having a maximum depth smaller than the maximum depth of the first recess and being closer to the electrical connection portion than the first recess. Crimp terminal characterized by that. The crimp terminal according to claim 1 or 2 ,
The conductor crimping portion includes a base portion extending in the axial direction from the electrical connection portion and a metal plate extending from the base portion in a direction intersecting the axial direction, and is bent so as to embrace the conductor exposed at the end of the electric wire. And a conductor barrel to be
Each of the first recess and the second recess is formed on an inner surface of at least one of the base and the conductor barrel. Electric wires with exposed conductors at the terminals;
A crimped terminal according to any one of claims 1 to 3 , which is crimped to the terminal,
The conductor crimping portion of the crimp terminal is crimped from the outside to the conductor of the terminal of the electric wire, and the conductor crimping portion is deformed so that the crimping height is substantially uniform in the axial direction of the crimp terminal, And among the said conductor crimping | compression-bonding parts, the 1st crimping part in which the said 1st recessed part is formed extends in the said axial direction rather than the 2nd crimping | compression-bonding part in which the said 2nd recessed part is formed, and thickness decreases. By doing so, the second crimping part is crimped to the conductor at a higher compression than the first crimping part. In the electric wire with a terminal according to claim 4 ,
The electric wire with a terminal, wherein the conductor of the electric wire is made of aluminum or an aluminum alloy. A method for manufacturing an electric wire with a terminal having an electric wire with a conductor exposed at a terminal and a crimp terminal crimped to the terminal,
A terminal forming step of forming the crimp terminal according to any one of claims 1 to 3 from a metal plate;
A crimping step of crimping the conductor crimping portion from the outside to the conductor of the terminal of the electric wire using a mold having a uniform crimping height in the axial direction of the crimping terminal,
In the crimping step, the first crimping portion in which the first recess is formed in the conductor crimping portion extends in the axial direction from the second crimping portion in which the second recess is formed. The method for manufacturing a terminal-attached electric wire, wherein the second crimping portion is crimped to the conductor at a higher compression than the first crimping portion by reducing the thickness. In the manufacturing method of the electric wire with a terminal according to claim 6 ,
The manufacturing method of the electric wire with a terminal characterized by the above-mentioned conductor consisting of aluminum or an aluminum alloy.

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