Conductor connection structure and method of manufacturing the same

Abstract

To provide a conductor connection structure in which a terminal and an electric wire can be joined by a small number of working processes while maintaining a joint size of the same degree as a conventional joint, and to provide a method of manufacturing the same.SOLUTION: A conductor connection structure includes an electric wire 10 having a core wire bundle 30 composed of a plurality of element wires 21 and an insulator covering part 22 covering the periphery of the plurality of element wires, and a conductor 40 having a plate-shaped end. The core wire bundle has a core wire tip part 32 extended toward the conductor, and a tapered surface 321 inclined in the thickness direction and the longitudinal direction of the core wire bundle is formed at the core wire tip part. The conductor has a conductor tip part 42 extended toward the core wire bundle, and a tapered surface 421 inclined in the thickness direction and the longitudinal direction of the conductor is formed at the conductor tip part. The core wire bundle and the conductor are arranged along the longitudinal direction of the conductor, and at least a part of the tapered surface of the core wire tip part and at least a part of the tapered surface of the conductor tip part are overlapped and joined in the thickness direction and the longitudinal direction of the conductor.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a conductor connection structure and a method for manufacturing the same. [Background technology]

[0002] A wide variety of electronic devices are installed in automobiles, and wire harnesses are arranged to transmit power, control signals, etc. to the electronic devices. The wire harnesses include multiple electric wires and connectors, and are connected to the electronic devices or other wire harnesses by fitting the connectors to the connectors of the electronic devices or the connectors of other wire harnesses.

[0003] An electric wire with terminal (electric wire with conductor) that constitutes such a wire harness generally includes an electric wire and a terminal fitting (conductor) attached to the end of the electric wire (see Patent Document 1).

[0004] Patent Document 1 discloses an electric wire with terminal, which includes an electric wire in which a conductor made of a material primarily containing a first metal is coated with an insulating material, and a terminal made of a material primarily containing a second metal different from the first metal and connected to the conductor exposed at one end of the electric wire. The electric wire with terminal further includes an alloy layer containing the first metal and the second metal formed along the entire outer periphery of the contact portion between the conductor and the terminal, spanning the conductor and the terminal. Specifically, the conductor, which includes multiple strands, and the terminal are butted together, and the contact portion between the conductor and the terminal is joined using a laser welder. The resulting joint between the conductor and the terminal forms an alloy layer, establishing electrical continuity and a strong bond between them. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-190617 Summary of the Invention [Problem to be solved by the invention]

[0006] In Patent Document 1, the multiple core wires exposed by the stripping process are heated and pressurized to form the wire conductor into a desired shape (plate-like, cylindrical, etc.) to fit the mating terminal, and then the wire conductor is joined to the terminal by laser welding. Therefore, by performing the wire forming process before joining, there is an issue that the number of processing steps increases compared to crimping or ultrasonic direct joining. Furthermore, with conventional butt contact, the components do not overlap in the thickness direction, making it difficult to apply methods (e.g., ultrasonic joining, resistance welding, thermocompression bonding, etc.) that join the interior by applying pressure in the thickness direction or propagating vibration or heat.

[0007] The present invention has been made in view of the problems inherent in the prior art, and an object of the present invention is to provide a conductor connection structure and a manufacturing method thereof that can join a terminal and an electric wire with fewer processing steps while maintaining a joint size similar to that of conventional butt joints. [Means for solving the problem]

[0008] A conductor connection structure according to an aspect of the present invention includes an electric wire having a core wire bundle consisting of multiple wires and an insulating coating portion covering the multiple wires, and a conductor having a plate-shaped end. The core wire bundle has a core wire tip portion extending toward the conductor, and the core wire tip portion has a tapered surface that slopes in the thickness direction and longitudinal direction of the core wire bundle. The conductor has a conductor tip portion extending toward the core wire bundle, and the conductor tip portion has a tapered surface that slopes in the thickness direction and longitudinal direction of the conductor. The core wire bundle and the conductor are arranged along the longitudinal direction of the conductor, and at least a portion of the tapered surface of the core wire tip portion and at least a portion of the tapered surface of the conductor tip portion are overlapped and joined in the thickness direction and longitudinal direction of the conductor.

[0009] A method for manufacturing a conductor connection structure according to one aspect of the present invention is a method for manufacturing a conductor connection structure by joining an electric wire having a core wire bundle consisting of a plurality of wires and an insulating coating covering the periphery of the plurality of wires to a conductor having a plate-shaped end, The manufacturing method includes the steps of forming a core wire tip portion in the core wire bundle and forming a tapered surface inclined in the thickness direction and longitudinal direction of the core wire bundle at the core wire tip portion, forming a conductor tip portion in the conductor and forming a tapered surface inclined in the thickness direction and longitudinal direction of the conductor at the conductor tip portion, arranging the core wire bundle and the conductor along the longitudinal direction of the conductor so that the core wire tip portion extends toward the conductor and the conductor tip portion extends toward the core wire bundle, and joining at least a portion of the tapered surface of the core wire tip portion and at least a portion of the tapered surface of the conductor tip portion in the thickness direction and longitudinal direction of the conductor. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a conductor connection structure and a manufacturing method thereof that can join a terminal and an electric wire with fewer processing steps while maintaining a joint size similar to that of conventional butt joints. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing an example of a conductor connection structure according to an embodiment of the present invention; [Figure 2A] 5A to 5C are schematic diagrams for explaining a method for manufacturing a core wire bundle in the conductor connection structure according to the present embodiment. [Figure 2B] 5A to 5C are schematic diagrams for explaining a method for manufacturing a core wire bundle in the conductor connection structure according to the present embodiment. [Figure 3] 5A to 5C are schematic diagrams illustrating a method for manufacturing a conductor in the conductor connection structure according to the present embodiment. [Figure 4] 3A to 3C are schematic diagrams illustrating a method for arranging and joining a core wire bundle and a conductor in the conductor connection structure according to the present embodiment. [Figure 5A] 3 is a top view schematically showing a joint between a core wire bundle and a conductor in the conductor connection structure according to the present embodiment. FIG. [Figure 5B]3 is a side view schematically showing a joint between a core wire bundle and a conductor in the conductor connection structure according to the present embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] The conductor connection structure and the manufacturing method thereof according to the present embodiment will be described in detail below with reference to the drawings. Note that the dimensional proportions in the drawings are exaggerated for the convenience of explanation and may differ from the actual proportions.

[0013] [Conductor connection structure] As shown in Fig. 1, an electric wire with conductor 1 to which the conductor connection structure according to this embodiment is applied includes an electric wire 10 and a conductor 40 connected to the tip of the electric wire 10. In this specification and drawings, the direction in which the electric wire 10 and the conductor 40 are aligned is indicated by arrow Y, the direction perpendicular to arrow Y (up-down direction) is indicated by arrow Z, and the direction perpendicular to both arrows Y and Z (left-right direction) is indicated by arrow X. In addition, of the electric wire 10 and the conductor 40, the conductor 40 side is referred to as the "front," and the electric wire 10 side in the opposite direction is referred to as the "rear."

[0014] The electric wire 10 is a coated electric wire having a plurality of wires 21 and an insulating sheath 22 that covers the wires 21. The wires 21 may be made of a conductive metal material such as copper, a copper alloy, aluminum, or an aluminum alloy. The insulating sheath 22 is made of a resin material that is flexible and electrically insulating. The structure of the wires 21 (electric wire conductor) is not limited to a twisted wire in which a plurality of core wires are twisted together, and may be other forms (single-core wire, braided wire, etc.). The electric wire 10 has the insulating sheath 22 removed at one end to expose a portion of the wires 21.

[0015] The electric wire 10 includes a core wire bundle 30 that is formed by shaping a plurality of exposed wires 21 and has a substantially rectangular shape in a plan view. That is, the electric wire 10 has the core wire bundle 30 made up of the plurality of wires 21. A wire tapered surface 23 is formed between the core wire bundle 30 and the plurality of wires 21 that are surrounded by the insulating sheath 22. The thickness of the core wire bundle 30 in the Z direction is smaller than the diameter of the bundle of the plurality of wires 21 that are surrounded by the insulating sheath 22, and the width of the core wire bundle 30 in the X direction is larger than the diameter of the bundle of the plurality of wires 21 that are surrounded by the insulating sheath 22.

[0016] The core wire bundle 30 has core wire tips 32 extending toward the conductor 40. The core wire tips 32 are formed with tapered surfaces 321 that are inclined in the thickness direction (Z direction) and longitudinal direction (Y direction) of the core wire bundle 30. The tapered surfaces 321 are provided over the entire width direction (X direction) of the core wire bundle 30, and the core wire tips 32 taper toward the front side.

[0017] The conductor 40 is made of a conductive metal and is a member having at least a plate-like end portion. The conductor 40 is formed by processing a plate made of a conductive metal material such as copper, a copper alloy, aluminum, or an aluminum alloy. The conductor 40 may be made of a single-layer metal plate or a laminated plate made by stacking multiple thin metal plates. The surface of the conductor 40 may be subjected to a surface treatment such as plating.

[0018] The conductor 40 may be a plate-like member having a substantially rectangular parallelepiped shape, such as a bus bar. In this embodiment, the thickness of the conductor 40 in the Z direction is substantially the same as the thickness of the core wire bundle 30 in the Z direction. Note that a leaf spring, a protrusion, a through-hole, or the like may be formed on the front side of the conductor 40 to prevent the conductor 40 from coming loose when inserted into a connector or the like. The thickness of the conductor 40 is not particularly limited, but may be, for example, 3 mm to 6 mm.

[0019] The conductor 40 has a conductor tip 42 extending toward the core wire bundle 30. The conductor tip 42 has a tapered surface 421 formed thereon that is inclined in the thickness direction (Z direction) and longitudinal direction (Y direction) of the conductor 40. The tapered surface 421 is provided over the entire width direction (X direction) of the conductor 40, and the conductor tip 42 tapers toward the rear side.

[0020] In the electric wire with conductor 1 of this embodiment, the core wire bundle 30 and the conductor 40 are arranged along the longitudinal direction (Y direction) of the conductor 40. At least a part of the tapered surface 321 of the core wire tip portion 32 and at least a part of the tapered surface 421 of the conductor tip portion 42 are overlapped in the thickness direction (Z direction) and longitudinal direction (Y direction) of the conductor 40. In other words, the tapered surface 321 of the core wire tip portion 32 and the tapered surface 421 of the conductor tip portion 42 are in contact with each other.

[0021] Furthermore, the tapered surface 321 of the core wire tip portion 32 is joined to the tapered surface 421 of the conductor tip portion 42. That is, with the tapered surface 321 of the core wire tip portion 32 and the tapered surface 421 of the conductor tip portion 42 in contact with each other, the interface between the tapered surface 321 and the tapered surface 421 is joined to form a joint.

[0022] The method for joining tapered surface 321 and tapered surface 421 is not particularly limited as long as they can be electrically connected, but they can be joined by ultrasonic bonding, for example. As shown in Fig. 4, ultrasonic bonding is a method in which core wire bundle 30 (core wire tip portion 32) and conductor 40 (conductor tip portion 42) are sandwiched between horn 61 and anvil 71 and ultrasonically vibrated horn 61 to join them.

[0023] In connection methods other than ultrasonic bonding, such as resistance welding and thermocompression bonding, joining can be performed by sandwiching a processing tool (electrode, probe, vibrator, etc.) in the plate thickness direction (Z direction) of the joint and applying a load such as pressure, vibration, heat, or electricity from at least one direction. In all of these joining methods, the core wire bundle 30 and the conductor 40 are arranged in the application direction, so the applied load can be propagated to both the core wire bundle 30 and the conductor 40 simultaneously.

[0024] In conventional methods, it was necessary to heat and pressurize a plurality of core wires to form the electric wire conductor into a desired shape (plate-like, cylindrical, etc.) so as to fit into a mating terminal, and then join the electric wire conductor to the terminal. However, in the conductor connection structure of the present embodiment, when carrying out the above-mentioned joining method, the core wire bundle 30 is produced by shaping and processing a plurality of element wires 21, and the core wire bundle 30 and the conductor 40 are joined together. Therefore, there is no need to carry out a wire shaping step in which a plurality of core wires are heated and pressurized before joining, as in the conventional method, and the terminal and electric wire can be joined with fewer processing steps than in the conventional method.

[0025] As described above, at least a part of the tapered surface 321 of the core wire tip portion 32 and at least a part of the tapered surface 421 of the conductor tip portion 42 are joined by overlapping them in the thickness direction and the longitudinal direction of the conductor 40. Therefore, the height of the joint after joining is lower than the height of the core wire bundle 30 and the conductor 40 when they are overlapped, and it is possible to maintain a joint size similar to that of conventional butt joints.

[0026] It is preferable that the thickness of the core wire bundle 30 in the Z direction is approximately the same as the thickness of the conductor 40 in the Z direction. With this structure, as shown in Fig. 5B, the height of the joint after joining is approximately the same as the thickness of the core wire bundle 30 and also the thickness of the conductor 40, making it possible to maintain a joint size similar to that of conventional butt joints. Furthermore, the contact area between the tapered surface 321 of the core wire tip portion 32 and the tapered surface 421 of the conductor tip portion 42 is increased, ensuring a wide joint, thereby improving the joint strength between the terminal and the wire.

[0027] It is also preferable that the length along the Y direction of the tapered portion of the core wire tip portion 32 is approximately the same as the length along the Y direction of the tapered portion of the conductor tip portion 42. With this structure, as shown in Fig. 5B, the height of the joint after joining can be approximately the same as the thickness of the core wire bundle 30 and also the thickness of the conductor 40, making it possible to maintain a joint size similar to that of conventional butt joints. Furthermore, the contact area between the tapered surface 321 of the core wire tip portion 32 and the tapered surface 421 of the conductor tip portion 42 is increased, ensuring a wide joint, thereby improving the joint strength between the terminal and the wire.

[0028] 5A, the width W2 of the joint where the tapered surface 321 of the core wire tip portion 32 and the tapered surface 421 of the conductor tip portion 42 are joined is preferably shorter than the width W1 of the conductor 40. Specifically, the width W2 of the joint along the X direction is preferably shorter than the width W1 of the conductor 40 along the X direction. By making W2 shorter than W1 in this way, the entire tapered surface 321 of the core wire tip portion 32 can be reliably joined to the tapered surface 421 of the conductor tip portion 42, and the joint size can be maintained at the same level as in conventional butt joints.

[0029] As described above, the conductor connection structure of this embodiment includes a core wire bundle 30 consisting of a plurality of wires 21, an electric wire 10 having an insulator coating 22 covering the periphery of the plurality of wires 21, and a conductor 40 having a plate-shaped end. The core wire bundle 30 has a core wire tip portion 32 extending toward the conductor 40, and a tapered surface 321 inclined in the thickness direction and longitudinal direction of the core wire bundle 30 is formed on the core wire tip portion 32. The conductor 40 has a conductor tip portion 42 extending toward the core wire bundle 30, and a tapered surface 421 inclined in the thickness direction and longitudinal direction of the conductor 40 is formed on the conductor tip portion 42. The core wire bundle 30 and the conductor 40 are arranged along the longitudinal direction of the conductor 40, and at least a portion of the tapered surface 321 of the core wire tip portion 32 and at least a portion of the tapered surface 421 of the conductor tip portion 42 are overlapped and joined in the thickness direction and longitudinal direction of the conductor 40.

[0030] In the above-described conductor connection structure, the core wire tip 32 and the conductor tip 42 are joined while overlapping each other, so the height of the joint after joining is lower than the height of the overlapping core wire bundle 30 and the conductor 40. Furthermore, by making the thicknesses of the core wire bundle 30 and the conductor 40 approximately the same or by making the lengths of the tapered portions of the core wire tip 32 and the conductor tip 42 approximately the same, it is possible to maintain the height of the joint after joining at a similar joint size to that of conventional butt joints. Furthermore, in the above-described conductor connection structure, the core wire bundle 30 and the conductor 40 are joined while the core wire bundle 30 is produced by shaping the multiple strands 21. This eliminates the need for a wire-forming process, such as heating and pressurizing the multiple core wires, before joining, as in the conventional method. From the above, the conductor connection structure of this embodiment can provide a conductor connection structure that can join a terminal and an electric wire with fewer processing steps while maintaining a similar joint size to that of conventional butt joints.

[0031] [Method of manufacturing conductor connection structure] Next, a method for manufacturing the conductor connection structure according to this embodiment will be described. The method for manufacturing the conductor connection structure is a method for manufacturing the conductor connection structure by joining an electric wire 10 having a core wire bundle 30 consisting of a plurality of element wires 21 and an insulating coating 22 covering the periphery of the plurality of element wires 21, to a conductor 40 having a plate-shaped end.

[0032] In the manufacturing method of this embodiment, first, an electric wire 10 having a core wire tip portion 32 is produced. Specifically, after preparing the electric wire 10, as shown in FIG. 2A, the insulator coating portion 22 at one end of the electric wire 10 is cut obliquely. Next, as shown in FIG. 2B, the tip of the obliquely cut insulator coating portion 22 is removed to expose a core wire bundle 30 consisting of a plurality of wires 21. In this manner, a core wire tip portion 32 is formed in the core wire bundle 30, extending from a base end (not shown) of the core wire bundle 30 along a surface 301 of the core wire bundle 30. Then, a tapered surface 321 is formed in the core wire tip portion 32, which is inclined in the thickness direction (Z direction) and longitudinal direction (Y direction) of the core wire bundle 30. The tapered surface 321 is provided over the entire width direction (X direction) of the core wire bundle 30, and the core wire tip portion 32 tapers forward.

[0033] In the above-described method, the insulator sheath 22 is cut obliquely, and then the tip of the insulator sheath 22 is removed to expose the core wire bundle 30 made up of the plurality of wires 21. However, the manufacturing method is not limited to this. For example, the tip of the insulator sheath 22 may be first removed to expose the core wire bundle 30 made up of the plurality of wires 21, and then the core wire bundle 30 may be cut obliquely. In addition, the processing method is not particularly limited, and may be, for example, general mechanical processing (cutting, pressing, thickness reduction, electric discharge machining, etc.).

[0034] As described above, the manufacturing method of the conductor connection structure according to this embodiment includes a step of forming a core wire tip portion 32 in the core wire bundle 30, and forming a tapered surface 321 in the core wire tip portion 32 that is inclined in the thickness direction and longitudinal direction of the core wire bundle 30.

[0035] Next, a conductor 40 having a conductor tip portion 42 is fabricated. Specifically, after preparing the conductor 40, as shown in FIG. 3, the conductor 40 is cut obliquely. In this manner, the conductor tip portion 42 is formed on the conductor 40, extending from the base end (not shown) of the conductor 40 along the surface 401 of the conductor 40. Then, a tapered surface 421 is formed on the conductor tip portion 42, which is inclined in the thickness direction (Z direction) and longitudinal direction (Y direction) of the conductor 40. The tapered surface 421 is provided over the entire width direction (X direction) of the conductor 40, and the conductor tip portion 42 tapers toward the rear side.

[0036] As described above, the manufacturing method of the conductor connection structure according to this embodiment includes a step of forming a conductor tip portion 42 on the conductor 40, and forming a tapered surface 421 on the conductor tip portion 42 that is inclined in the thickness direction and longitudinal direction of the conductor 40.

[0037] The manufacturing method of the conductor connection structure according to the present embodiment includes a step of arranging the core wire bundle 30 and the conductor 40 along the longitudinal direction of the conductor 40 so that the core wire tip portion 32 extends toward the conductor 40 and the conductor tip portion 42 extends toward the core wire bundle 30. Specifically, in the case of ultrasonic bonding as shown in FIG. 4 , the core wire bundle 30 (core wire tip portion 32) and the conductor 40 (conductor tip portion 42) can be arranged as described above and then sandwiched between the horn 61 and the anvil 71. At this time, the core wire bundle 30 (core wire tip portion 32) and the conductor 40 (conductor tip portion 42) are arranged along the longitudinal direction (Y direction) of the conductor 40. Furthermore, by positioning the tapered portion of the core wire tip portion 32 and the tapered portion of the conductor tip portion 42 so that they are spaced apart in the thickness direction (Z direction) of the conductor 40, the height of the joint after bonding can be approximately the same as the thickness of the core wire bundle 30 and also approximately the same as the thickness of the conductor 40. That is, it is possible to maintain a joint size approximately the same as that of conventional butt joints. Note that the positional relationship between the tapered portion of the core wire tip portion 32 and the tapered portion of the conductor tip portion 42 in the thickness direction (Z direction) of the conductor 40 may be reversed, such that the tapered portion of the core wire tip portion 32 is on the lower side and the tapered portion of the conductor tip portion 42 is on the upper side. Furthermore, in joining methods other than the ultrasonic joining described above, the core wire bundle 30 (core wire tip portion 32) and the conductor 40 (conductor tip portion 42) can be positioned as described above and then sandwiched by a processing tool (electrode, probe, vibrator, etc.).

[0038] Furthermore, the manufacturing method of the conductor connection structure according to this embodiment includes a step of overlapping and joining at least a portion of the tapered surface 321 of the core wire tip portion 32 and at least a portion of the tapered surface 421 of the conductor tip portion 42 in the thickness direction and longitudinal direction of the conductor 40. As shown in FIG. 4 , the core wire bundle 30 (core wire tip portion 32) and the conductor 40 (conductor tip portion 42) are arranged in the load application direction, so that an applied load can be transmitted to both the core wire bundle 30 and the conductor 40 simultaneously. Conventional methods require heating and pressurizing multiple core wires to form an electric wire conductor into a desired shape (e.g., a plate shape, a cylindrical shape) so as to fit the mating terminal, and then joining the electric wire conductor to the terminal. However, in the manufacturing method of the conductor connection structure according to this embodiment, when the above-mentioned joining method is performed, the core wire bundle 30 and the conductor 40 are joined while the core wire bundle 30 is produced by shaping multiple element wires 21. Therefore, there is no need to carry out a wire forming process such as heating and pressurizing a plurality of core wires before joining, as in the conventional method, and the terminal and the wire can be joined with fewer processing steps than in the conventional method.

[0039] As described above, the manufacturing method of the conductor connection structure of this embodiment is a manufacturing method of a conductor connection structure formed by joining together an electric wire 10 having a core wire bundle 30 composed of a plurality of wires 21 and an insulating coating 22 covering the periphery of the plurality of wires 21, and a conductor 40 having a plate-shaped end. The manufacturing method includes a step of forming a core wire tip portion 32 in the core wire bundle 30, and forming a tapered surface 321 in the core wire tip portion 32 that is inclined in the thickness direction and longitudinal direction of the core wire bundle 30. The manufacturing method includes a step of forming a conductor tip portion 42 in the conductor 40, and forming a tapered surface 421 in the conductor tip portion 42 that is inclined in the thickness direction and longitudinal direction of the conductor 40. The manufacturing method includes a step of arranging the core wire bundle 30 and the conductor 40 along the longitudinal direction of the conductor 40 so that the core wire tip portion 32 extends toward the conductor 40 and the conductor tip portion 42 extends toward the core wire bundle 30. The manufacturing method includes a step of overlapping and joining at least a part of the tapered surface 321 of the core wire tip portion 32 and at least a part of the tapered surface 421 of the conductor tip portion 42 in the thickness direction and the longitudinal direction of the conductor 40. As described above, the manufacturing method of a conductor connection structure of this embodiment can provide a manufacturing method of a conductor connection structure that can join a terminal and an electric wire with fewer processing steps while maintaining a joint size similar to that of conventional butt joints.

[0040] 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]

[0041] 1. Conductor-attached wire 10 Electric wire 21 Wire 22 Insulating coating 30 core wire bundle 32 Core wire tip 40 Conductors 42 Conductor tip 321 Tapered surface 421 Tapered surface W1 Conductor width W2 Joint width

Claims

1. an electric wire having a core wire bundle made up of a plurality of element wires and an insulating coating portion covering the periphery of the plurality of element wires; a conductor having a plate-shaped end, the core wire bundle has a core wire tip portion extending toward the conductor, a tapered surface inclined in the thickness direction and the longitudinal direction of the core wire bundle is formed at the tip of the core wire; the conductor has a conductor tip portion extending toward the core wire bundle, A tapered surface inclined in the thickness direction and the longitudinal direction of the conductor is formed at the tip of the conductor, the core wire bundle and the conductor are arranged along the longitudinal direction of the conductor, A conductor connection structure in which at least a portion of the tapered surface of the core wire tip portion and at least a portion of the tapered surface of the conductor tip portion are overlapped and joined in the thickness direction and longitudinal direction of the conductor.

2. The conductor connection structure according to claim 1 , wherein a width of a joint where the tapered surface of the tip end of the core wire and the tapered surface of the tip end of the conductor are joined is smaller than a width of the conductor.

3. A method for manufacturing a conductor connection structure, which is formed by joining an electric wire having a core wire bundle made up of a plurality of element wires and an insulating coating portion covering the periphery of the plurality of element wires, to a conductor having a plate-shaped end, forming a core wire tip portion in the core wire bundle, and forming a tapered surface inclined in a thickness direction and a longitudinal direction of the core wire bundle at the core wire tip portion; forming a conductor tip portion on the conductor, and forming a tapered surface on the conductor tip portion that is inclined in a thickness direction and a longitudinal direction of the conductor; a step of arranging the core wire bundle and the conductor along a longitudinal direction of the conductor so that the core wire tip portion extends toward the conductor and the conductor tip portion extends toward the core wire bundle; a step of overlapping and joining at least a part of the tapered surface of the core tip portion and at least a part of the tapered surface of the conductor tip portion in a thickness direction and a longitudinal direction of the conductor; A method for manufacturing a conductor connection structure comprising:

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