Terminal and electric wire with the terminal

Abstract

To provide a terminal and an electric wire with the terminal, capable of being contacted to a core wire of the electric wire with a high performance (a short time and a low-bonding condition).SOLUTION: A terminal 12 comprises: a plate-like terminal main body 30 that includes a width direction to a predetermined direction; and a conductor connection part (an electric wire connection part 32) that is formed in the terminal main body 30, and to which a conductive member (a core wire 21) formed by a conductive material is connected. In the conductor connection part (the electric wire connection part 32), a rough surface part 40 constructed by a plurality of concave parts and convex parts is formed, and the rough surface part 40 is formed by exciting a sand blast processing or a knurl processing to a front surface of the conductor connection part (the electric wire connection part 32).SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a terminal and an electric wire with a terminal. [Background technology]

[0002] When manufacturing an electric wire with terminal in which a terminal is connected to a core wire exposed from the end of the electric wire, the core wire is pressed against the terminal and ultrasonic vibration is applied to integrally connect the core wire and the terminal by ultrasonic bonding (see Patent Document 1). In such an electric wire with terminal, generally, the core wire exposed from the end of the electric wire and a part of the terminal are sandwiched between an anvil and a horn, and the horn is ultrasonically vibrated to bond the core wire of the electric wire to the terminal (ultrasonic bonding). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-145263 A Summary of the Invention [Problem to be solved by the invention]

[0004] In joining a terminal and a core wire of an electric wire using ultrasonic waves, it is important to transmit the ultrasonic vibration generated from the ultrasonic equipment to the joining interface between the terminal and the core wire of the electric wire with as little loss as possible in order to join them efficiently (in a short time). Although it is possible to join the terminal and the core wire of the electric wire efficiently (in a short time) by changing the joining conditions (joining time, ultrasonic output, joining load, etc.), a problem may arise in which general-purpose ultrasonic equipment cannot be used.

[0005] The present invention has been made in view of the problems inherent in the conventional techniques, and an object of the present invention is to provide a terminal and an electric wire with a terminal that can be joined to a core wire of an electric wire with high efficiency (short time and low joining conditions). [Means for solving the problem]

[0006] A terminal according to an embodiment of the present invention comprises a plate-shaped terminal body having a width direction in a predetermined direction, and a conductor connection portion formed on the terminal body and to which a conductor member formed from a conductive material is connected, and the conductor connection portion has a rough surface portion composed of a number of recesses and protrusions, and the rough surface portion is formed by applying sandblasting or knurling to the surface of the conductor connection portion.

[0007] The electric wire with terminal according to one embodiment of the present invention comprises an electric wire having a core wire and a coating that covers the core wire while leaving a portion of the core wire exposed, and a terminal having an electric wire connection portion to which the core wire of the electric wire is connected, and the electric wire connection portion has a rough surface portion composed of a large number of concave and convex portions, and the rough surface portion is formed by applying sandblasting or knurling to the surface of the electric wire connection portion, and the core wire and the terminal are joined with the core wire and the rough surface portion in contact with each other. Effect of the Invention

[0008] According to the present invention, it is possible to provide a terminal and an electric wire with a terminal that can be joined to a core wire of an electric wire with high efficiency (short time, low joining conditions). [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view showing an example of an electric wire with a terminal according to the present embodiment. [Diagram 2] FIG. 2 is a plan view showing an example of an electric wire with a terminal according to the present embodiment. [Diagram 3] FIG. 2 is a side view showing an example of an electric wire with a terminal according to the present embodiment. [Figure 4] FIG. 2 is a front view showing an example of an electric wire with a terminal according to the present embodiment. [Diagram 5] FIG. 2 is a plan view showing an example of a terminal according to the embodiment. [Figure 6] FIG. 4 is a side view showing an example of a terminal according to the embodiment. [Figure 7] FIG. 2 is a perspective view showing a state in which the terminal is set in an ultrasonic bonding machine. [Figure 8A] FIG. 4 is a diagram showing an example of an arrangement of a rough surface portion. [Figure 8B] FIG. 4 is a diagram showing an example of an arrangement of a rough surface portion. [Figure 8C] FIG. 4 is a diagram showing an example of an arrangement of a rough surface portion. [Figure 9A] FIG. 13 is a diagram showing an example of an arrangement of a rough surface portion in another embodiment. [Figure 9B] FIG. 13 is a diagram showing an example of an arrangement of a rough surface portion in another embodiment. [Figure 9C] FIG. 13 is a diagram showing an example of an arrangement of a rough surface portion in another embodiment. [Figure 10A] FIG. 13 is a diagram showing an example of yet another arrangement of rough surface portions. [Figure 10B] FIG. 13 is a diagram showing an example of yet another arrangement of rough surface portions. [Figure 10C] FIG. 13 is a diagram showing an example of yet another arrangement of rough surface portions. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the terminal and the electric wire with terminal according to the present embodiment will be described in detail with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for the convenience of explanation and may differ from the actual ratios.

[0011] 1 to 4, an electric wire with terminal 10 includes an electric wire 11 and a terminal 12 connected to an end of the electric wire 11. In this embodiment, the electric wire with terminal 10 in which the terminal 12 is connected to the end of the electric wire 11 will be described as an example of a joint body.

[0012] The electric wire 11 is an insulated electric wire having a conductor member (core wire 21) made of a conductive material and a coating 22 as an outer skin that covers the periphery of the core wire 21. The core wire 21 is configured by bundling a plurality of strands made of a conductive metal material such as copper, copper alloy, aluminum, or aluminum alloy. The material of the conductor member is not limited to copper, copper alloy, aluminum, aluminum alloy, or the like, and may be other metal materials having electrical conductivity. In addition, the structure of the conductor material is not limited to a twisted wire in which a plurality of strands are twisted together, and may be in other forms (single-core wire, braid, FPC (flexible thin electric wire), etc.).

[0013] The coating 22 is made of a resin material having flexibility and insulating properties. The material and structure of the coating 22 are not particularly limited. At the end of the electric wire 11, the coating 22 is removed to expose a part of the core wire 21. When the core wire 21 is made of a plurality of strands made of copper or a copper alloy, each strand may be plated with tin, nickel, silver, gold, or the like. In addition, the type of plating applied to each strand or core wire is not particularly limited.

[0014] The terminal 12 is formed by processing a plate material made of a conductive metal material. In this embodiment, the terminal 12 is formed by processing a plate material (base material) made of copper or a copper alloy. The material of the base material of the terminal 12 is not limited to copper or a copper alloy, and may be other metallic materials having conductivity. Furthermore, the base material of the terminal 12 may be plated with tin, nickel, silver, gold, or the like. Furthermore, the type of plating applied to the base material of the terminal 12 is not particularly limited.

[0015] The terminal 12 is formed as a flat terminal body 30, and this terminal 12 (terminal body 30) has an electrical connection portion 31 and a conductor connection portion (electric wire connection portion 32). The terminal 12 (terminal body 30) may further have a coating crimping portion (rear leg portion) having a pair of crimping pieces that are crimped to the coating 22 at the end of the electric wire 11.

[0016] The electrical connection portion 31 of the terminal 12 has a hole portion 33 penetrating the front and rear surfaces of the terminal body 30. This electrical connection portion 31 is electrically connected by inserting a fastening member such as a bolt or a screw through the hole portion 33 and fastening and fixing it to a connected portion of various devices, etc. The shape of the electrical connection portion 31 formed at the front end of the terminal 12 is not particularly limited, and may be, for example, a male type, a female type, or an LA (round) type.

[0017] One surface of the electric wire connecting portion 32 of the terminal 12 is a conductor joining surface 35, and the core wire 21 of the electric wire 11 is joined to this conductor joining surface 35. The core wire 21 of the electric wire 11 is joined to the conductor joining surface 35 of the electric wire connecting portion 32 by ultrasonic joining. In this way, the terminal 12 and the core wire 21 of the electric wire 11 are electrically connected to each other.

[0018] The electric wire with terminal 10 may be provided with an exterior member such as a heat shrink tube, a resin material, a sheet, etc., which is applied to the joint (electric wire connection portion 32) between the terminal 12 and the core wire 21 of the electric wire 11 for the purpose of waterproofing, corrosion prevention, etc.

[0019] In this embodiment, one electric wire 11 is joined to the terminal 12, but a plurality of electric wires may be joined together as in a joint terminal, and in the case where a plurality of electric wires are joined together, this embodiment can be applied to, for example, a bus bar. That is, the terminal 12 may have a plurality of conductor connecting portions (electric wire connecting portions 32).

[0020] 5 to 7, an uneven surface portion (rough surface portion 40) consisting of numerous recesses and protrusions is formed on the conductor joining surface 35 of the terminal 12 to which the core wire 21 of the electric wire 11 is joined. This rough surface portion 40 is formed at a location where friction is likely to occur in the conductor connecting portion (electric wire connecting portion 32) due to the shape of the horn 61 (see FIGS. 4 and 7) during ultrasonic joining, that is, a location where the metal constituting the core wire 21 undergoes plastic flow and the core wire 21 is likely to stretch.

[0021] In the terminal 12 of this embodiment, the rough surface portion 40 is formed by subjecting the surface of the conductor joint surface 35 of the terminal 12 to a process (e.g., sandblasting, knurling, etc.) that makes it easier for friction to occur, that is, a roughening process (roughening treatment). In the terminal 12 of this embodiment, the rough surface portion 40 is formed in the wire connection portion 32 in a longitudinal direction intersecting the width direction of the terminal 12 (terminal body 30) with a space therebetween, and has a pair of widthwise extending rough surface regions 41, 41 that extend in the width direction.

[0022] The terminal 12 and the core wire 21 of the electric wire 11 are joined in a predetermined joining range (see FIG. 8A), and the rough surface portion 40 is processed on the surface of the conductor joining surface 35 so as to include the joining range. The range in which the rough surface portion 40 is processed is such that it overlaps with a width at least equal to or greater than the outer diameter of the core wire 21 on the conductor joining surface 35. In the illustrated example, the rough surface portion 40 is processed from the end (outer edge) of the terminal 12, but this is not limiting, and the rough surface portion 40 does not necessarily have to be processed from the end (outer edge) of the terminal 12.

[0023] The coefficient of friction in the rough surface portion 40 only needs to be greater than the coefficient of friction in the remaining portion of the conductor joining surface 35 (portions other than the rough surface portion 40), and there is no particular limitation on the numerical range of the coefficient of friction.

[0024] There is no particular limitation on the manufacturing method (molding method) of the rough surface portion 40. For example, the rough surface portion 40 may be formed when the terminal 12 (terminal body 30) is subjected to press processing (punching, bending, etc.) using a die.

[0025] 8A to 8C show an example of the arrangement of the rough surface portion 40. The rough surface portion 40 shown in FIG. 8A to FIG. 8C is formed by sandblasting. The rough surface portion 40 shown in FIG. 8A is formed at an interval in the longitudinal direction intersecting the width direction of the terminal 12 (terminal body 30) in the electric wire connection portion 32, and has a pair of widthwise extending rough surface regions 41, 41 extending in the width direction. The rough surface portion 40 shown in FIG. 8B is formed at both sides in the width direction of the electric wire connection portion 32, and has a pair of longitudinally extending rough surface regions 42, 42 extending in the longitudinal direction intersecting the width direction of the terminal 12 (terminal body 30). Furthermore, the rough surface portion 40 shown in FIG. 8C has a pair of widthwise extending rough surface regions 41, 41 and a pair of longitudinally extending rough surface regions 42, 42, and is formed in a rectangular frame shape in a plan view.

[0026] 9A to 9C show an example of the arrangement of the rough surface portion 40A in another embodiment. The rough surface portion 40A shown in FIG. 9A to FIG. 9C is formed by knurling (cross knurling) of a cross stitch. The rough surface portion 40A shown in FIG. 9A is formed at an interval in the longitudinal direction intersecting with the width direction of the terminal 12 (terminal body 30) in the electric wire connection portion 32, and has a pair of widthwise extending rough surface regions 41A, 41A extending in the width direction. The rough surface portion 40A shown in FIG. 9B is formed at both sides in the width direction of the electric wire connection portion 32, and has a pair of longitudinally extending rough surface regions 42A, 42A extending in the longitudinal direction intersecting with the width direction of the terminal 12 (terminal body 30). Furthermore, the rough surface portion 40A shown in FIG. 9C has a pair of widthwise extending rough surface regions 41A, 41A and a pair of longitudinally extending rough surface regions 42A, 42A, and is formed in a rectangular frame shape in a plan view.

[0027] 10A to 10C show an example of the arrangement of the rough surface portion 40B in another embodiment. The rough surface portion 40B shown in FIG. 10A to FIG. 10C is formed by flat knurling (straight knurling). The rough surface portion 40B shown in FIG. 10A is formed at an interval in the longitudinal direction intersecting the width direction of the terminal 12 (terminal body 30) in the electric wire connection portion 32, and has a pair of widthwise extending rough surface regions 41B, 41B extending in the width direction. The rough surface portion 40B shown in FIG. 10B is formed at both sides in the width direction of the electric wire connection portion 32, and has a pair of lengthwise extending rough surface regions 42B, 42B extending in the longitudinal direction intersecting the width direction of the terminal 12 (terminal body 30). Furthermore, rough surface portion 40B shown in FIG. 10C has a pair of width-direction extending rough surface regions 41B, 41B and a pair of longitudinally extending rough surface regions 42B, 42B, and is formed in the shape of a rectangular frame in plan view.

[0028] An example of a method for manufacturing the electric wire with terminal 10 according to this embodiment will be described below.

[0029] 7, the terminal 12 with the rough surface portion 40 formed thereon and the core wire 21 of the electric wire 11 are set in an ultrasonic welding machine equipped with a horn 61 and an anvil (not shown). Specifically, the electric wire connection portion 32 of the terminal 12 and the core wire 21 of the electric wire 11 are arranged so as to overlap each other between the horn 61 and the anvil constituting the ultrasonic welding machine, and the core wire 21 is arranged on the conductor joining surface 35 of the electric wire connection portion 32. In addition, both sides in the width direction of the terminal 12 are held by using terminal pressers 62.

[0030] The horn 61 of the ultrasonic bonding machine is equipped with a vibrator (not shown) that generates ultrasonic vibrations when powered by an alternating current, and is vibrated by this vibrator. The terminal 12 and the core wire 21, which are arranged above the anvil and are placed between the horn 61 and the anvil, are clamped between the horn 61 and the anvil by the load from the horn 61.

[0031] Once the terminal 12 and the core wire 21 are placed between the horn 61 and the anvil, the horn 61 is moved toward the anvil. As a result, the terminal 12 and the core wire 21 are clamped by the horn 61 and the anvil while being pressurized. In this state, an AC current is supplied to the transducer. Then, the transducer ultrasonically vibrates the horn 61 in the horizontal direction, transmitting ultrasonic vibration energy to the terminal 12 and the core wire 21, and ultrasonically bonding the core wire 21 of the electric wire 11 to the conductor bonding surface 35 of the terminal 12. As a result, a terminal-attached electric wire 10 in which the electric wire 11 is connected to the terminal 12 is obtained.

[0032] In this embodiment, the rough surface portion 40 is formed at a location of the electric wire connection portion 32 of the terminal 12 where friction is likely to occur. When the core wire 21 of the electric wire 11 comes into contact with the rough surface portion 40 at a location of the electric wire connection portion 32 where friction is likely to occur, the contact pressure at that location is further increased, and the core wire 21 becomes more likely to stretch. This action makes it possible to form a starting point having a strong metal bond at at least one location between the terminal 12 and the electric wire 11 in a short time (initial stage of ultrasonic bonding), and the bonding range can be expanded from the starting point. As a result, it becomes possible to bond the terminal 12 and the core wire 21 of the electric wire 11 with high efficiency (short time, low bonding conditions).

[0033] Thus, the terminal 12 according to this embodiment includes a plate-like terminal body 30 having a width direction in a predetermined direction, and a conductor connection portion (wire connection portion 32) formed on the terminal body 30 and connected to a conductor member (core wire 21) made of a conductive material. The conductor connection portion (wire connection portion 32) is formed with a rough surface portion 40 consisting of a large number of recesses and protrusions, and the rough surface portion 40 is formed by performing sandblasting or knurling on the surface of the conductor connection portion (wire connection portion 32).

[0034] When the core wire 21 of the electric wire 11 comes into contact with the rough surface portion 40 at a location in the electric wire connection portion 32 where friction is originally likely to occur, the contact pressure at that location is further increased, making it easier for the core wire 21 to stretch. This action makes it possible to form a starting point with a strong metal bond at at least one location between the terminal 12 and the electric wire 11 in a short time (initial stage of ultrasonic bonding), and to expand the bonding range from the starting point.

[0035] As described above, according to this embodiment, it is possible to provide the terminal 12 that can be joined to the core wire 21 of the electric wire 11 with high efficiency (short time, low joining conditions).

[0036] In the terminal 12, the rough surface portion 40 may have a pair of widthwise extending rough surface regions 41, 41 formed at intervals in the longitudinal direction intersecting the width direction in the conductor connection portion (wire connection portion 32) and extending in the width direction.

[0037] When the core wire 21 of the electric wire 11 comes into contact with the widthwise extending rough surface region 41 at a location in the electric wire connection portion 32 where friction is originally likely to occur, the contact pressure at that location is further increased, making it easier for the core wire 21 to stretch further in the axial direction (longitudinal direction of the terminal 12). Due to this action, a starting point with a strong metal bond can be formed at least at one or more locations between the terminal 12 and the electric wire 11 in a short time (initial stage of ultrasonic bonding), and the bonding range can be expanded from the starting point.

[0038] In the terminal 12, the rough surface portion 40 may be formed on both widthwise sides of the conductor connection portion (wire connection portion 32) and may have a pair of longitudinally extending rough surface regions 42, 42 extending in a longitudinal direction intersecting the width direction.

[0039] When the core wire 21 of the electric wire 11 comes into contact with the longitudinally extending rough surface region 42 at a location in the electric wire connection portion 32 where friction is originally likely to occur, the contact pressure at that location is further increased, making it easier for the core wire 21 to stretch further in the axial direction (the longitudinal direction of the terminal 12). This action makes it possible to form a starting point with a strong metal bond at at least one location between the terminal 12 and the electric wire 11 in a short time (the initial stage of ultrasonic bonding), and to expand the bonding range from the starting point.

[0040] In the terminal 12, the rough surface portion 40 may have a pair of widthwise extending rough surface regions 41, 41 and a pair of longitudinally extending rough surface regions 42, 42, and may be formed in a rectangular frame shape in a plan view. The pair of widthwise extending rough surface regions 41, 41 are formed at intervals in the longitudinal direction intersecting the width direction in the conductor connection portion (wire connection portion 32) and extend in the width direction. The pair of longitudinally extending rough surface regions 42, 42 are formed at both sides in the width direction in the conductor connection portion (wire connection portion 32) and extend in the longitudinal direction.

[0041] When the core wire 21 of the electric wire 11 comes into contact with the widthwise extending rough surface region 41 and the longitudinally extending rough surface region 42 at a location in the electric wire connection portion 32 where friction is originally likely to occur, the contact pressure at that location is further increased, making it easier for the core wire 21 to stretch further in the axial direction (longitudinal direction of the terminal 12). Due to this action, a starting point with a strong metal bond can be formed at least at one or more locations between the terminal 12 and the electric wire 11 in a short time (initial stage of ultrasonic bonding), and the bonding range can be expanded from the starting point.

[0042] Moreover, the electric wire with terminal 10 according to this embodiment includes an electric wire 11 having a core wire 21 and a covering 22 covering the core wire 21 with a part of the core wire 21 exposed, and a terminal 12 having an electric wire connection portion 32 to which the core wire 21 of the electric wire 11 is connected. The electric wire connection portion 32 is formed with a rough surface portion 40 consisting of a large number of recesses and protrusions, and the rough surface portion 40 is formed by subjecting the surface of the electric wire connection portion 32 to sandblasting or knurling. The core wire 21 and the terminal 12 are joined with the core wire 21 and the rough surface portion 40 in contact with each other.

[0043] When the core wire 21 of the electric wire 11 comes into contact with the rough surface portion 40 at a location where high friction is originally generated in the electric wire connection portion 32, the contact pressure at that location is further increased, and the core wire 21 becomes more likely to stretch in the axial direction (the longitudinal direction of the terminal 12). Due to this action, a starting point with a strong metal bond can be formed at least at one or more locations between the terminal 12 and the electric wire 11 in a short time (the initial stage of ultrasonic bonding), and the bonding range can be expanded from the starting point.

[0044] As described above, according to this embodiment, it is possible to provide the electric wire with terminal 10 that can be joined to the core wire 21 of the electric wire 11 with high efficiency (short time, low joining conditions).

[0045] In the terminal-fitted electric wire 10, the rough surface portion 40 may have a pair of widthwise extending rough surface regions 41, 41 formed at the wire connection portion 32 at intervals in a longitudinal direction intersecting the width direction of the terminal 12 and extending in the width direction.

[0046] When the core wire 21 of the electric wire 11 comes into contact with the widthwise extending rough surface region 41 at a location in the electric wire connection portion 32 where friction is originally likely to occur, the contact pressure at that location is further increased, making it easier for the core wire 21 to stretch further in the axial direction (longitudinal direction of the terminal 12). Due to this action, a starting point with a strong metal bond can be formed at least at one or more locations between the terminal 12 and the electric wire 11 in a short time (initial stage of ultrasonic bonding), and the bonding range can be expanded from the starting point.

[0047] In the terminal-fitted electric wire 10, the rough surface portion 40 may be formed on both sides of the width of the terminal 12 in the electric wire connection portion 32, and may have a pair of longitudinally extending rough surface regions 42, 42 extending in a longitudinal direction intersecting the width direction.

[0048] When the core wire 21 of the electric wire 11 comes into contact with the longitudinally extending rough surface region 42 at a location in the electric wire connection portion 32 where friction is originally likely to occur, the contact pressure at that location is further increased, making it easier for the core wire 21 to stretch further in the axial direction (the longitudinal direction of the terminal 12). This action makes it possible to form a starting point with a strong metal bond at at least one location between the terminal 12 and the electric wire 11 in a short time (the initial stage of ultrasonic bonding), and to expand the bonding range from the starting point.

[0049] In the electric wire with terminal 10, the rough surface portion 40 may have a pair of widthwise extending rough surface regions 41, 41 and a pair of longitudinally extending rough surface regions 42, 42, and may be formed in a rectangular frame shape in a plan view. The pair of widthwise extending rough surface regions 41, 41 are formed at intervals in the longitudinal direction intersecting the width direction of the terminal 12 in the electric wire connection portion 32, and extend in the width direction. The pair of longitudinally extending rough surface regions 42, 42 are formed at both sides in the width direction of the electric wire connection portion 32, and extend in the longitudinal direction.

[0050] When the core wire 21 of the electric wire 11 comes into contact with the widthwise extending rough surface region 41 and the longitudinally extending rough surface region 42 at a location in the electric wire connection portion 32 where friction is originally likely to occur, the contact pressure at that location is further increased, making it easier for the core wire 21 to stretch further in the axial direction (longitudinal direction of the terminal 12). Due to this action, a starting point with a strong metal bond can be formed at least at one or more locations between the terminal 12 and the electric wire 11 in a short time (initial stage of ultrasonic bonding), and the bonding range can be expanded from the starting point.

[0051] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment. [Explanation of symbols]

[0052] 10 Wires with terminals 11 Electric wire 12 Terminals 21 Core Wire 22 Covering 30 Terminal body 32 Wire connection 40 Rough Face 41 Direction extends in the rough area 42 The long hand direction extends to the rough surface area

Claims

1. A plate-shaped terminal body having a width direction in a predetermined direction; a conductor connection portion formed on the terminal body and to which a conductor member made of a conductive material is connected; The conductor connection portion has a rough surface portion formed thereon, the rough surface portion being composed of a number of recesses and protrusions, The rough surface portion is formed by performing sandblasting or knurling on the surface of the conductor connection portion. Terminal.

2. The terminal according to claim 1 , wherein the rough surface portion has a pair of widthwise extending rough surface regions formed at the conductor connection portion at an interval in a longitudinal direction intersecting the width direction and extending in the width direction.

3. The terminal according to claim 1 , wherein the rough surface portion has a pair of longitudinally extending rough surface regions formed on both sides of the conductor connection portion in the width direction and extending in a longitudinal direction intersecting the width direction.

4. 2. The terminal as described in claim 1, wherein the rough surface portion has a pair of widthwise extending rough surface regions formed at intervals in a longitudinal direction intersecting the width direction in the conductor connection portion and extending in the width direction, and a pair of longitudinally extending rough surface regions formed on both sides of the width direction in the conductor connection portion and extending in the longitudinal direction, and is formed in a rectangular frame shape in a planar view.

5. an electric wire having a core wire and a coating that covers the core wire while leaving a part of the core wire exposed; a terminal having an electric wire connection portion to which the core wire of the electric wire is connected, The electric wire connection portion has a rough surface portion formed thereon, the rough surface portion being composed of a number of recesses and protrusions, The rough surface portion is formed by performing sandblasting or knurling on a surface of the electric wire connection portion, The core wire and the terminal are joined together in a state in which the core wire and the rough surface portion are in contact with each other. Wire with terminal.

6. The electric wire with terminal according to claim 5 , wherein the rough surface portion has a pair of widthwise extending rough surface regions formed at an interval in a longitudinal direction intersecting a width direction of the terminal in the electric wire connection portion and extending in the width direction.

7. The electric wire with terminal according to claim 5 , wherein the rough surface portion is formed at both sides of the terminal in a width direction in the electric wire connection portion, and has a pair of longitudinally extending rough surface regions extending in a longitudinal direction intersecting the width direction.

8. 6. The electric wire with terminal according to claim 5, wherein the rough surface portion has a pair of widthwise extending rough surface regions formed at intervals in a longitudinal direction intersecting a width direction of the terminal in the wire connection portion and extending in the width direction, and a pair of longitudinally extending rough surface regions formed at both sides in the width direction of the wire connection portion and extending in the longitudinal direction, and is formed in a rectangular frame shape in a plan view.

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