Wire with terminal, method for manufacturing the same, and wire with connector

Abstract

To provide a wire with a terminal which can suppress cutting of wire strands even if the wire and the terminal are joined together by ultrasonic junction, a method for manufacturing the wire, and a wire with a connector.SOLUTION: In the wire with a terminal, an exposed conductor portion exposed from an insulating covering part of the wire including a conductor and the insulating covering part covering the outer periphery of the conductor is joined to the main body part of a terminal. When viewed in the longitudinal cross-section of the wire along the longitudinal direction of the conductor, the cross-section including the main body part, the tip end of the exposed conductor portion has a joining-surface portion that joins to the main body part and a non-joining-surface portion that faces the joining-surface portion and does not join to the main body part, and, in a direction parallel to the longitudinal direction of the conductor, a length L1 between the non-joining-surface portion and a tip edge portion of the insulating covering part on a non-joining-surface side is longer than a length L2 between the joining-surface portion and a tip edge portion of the insulating covering part on a joining-surface side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an electric wire with a terminal, a method for manufacturing the same, and an electric wire with a connector. [Background technology]

[0002] 2. Description of the Related Art Conventionally, various methods for electrically connecting an electric wire and a terminal have been investigated.

[0003] For example, Patent Document 1 describes an ultrasonic welding method that eliminates incomplete welding between a core wire and a terminal fitting. This ultrasonic welding method includes a first step of mounting a terminal fitting, which has a bottom wall portion and a pair of upright walls extending from both ends of the bottom wall portion, on a first die; a second step of placing a core wire made of multiple strands on the bottom wall portion of the terminal fitting; and a third step of inserting a second die between the pair of upright walls and moving it toward the first die to sandwich the core wire and the terminal fitting between the first and second dies and apply ultrasonic energy while applying pressure in a direction that brings the core wire and the terminal fitting closer to each other, thereby welding the core wire and the terminal fitting. Then, in the third step, the second die is moved toward the first die while the second die is used to spread the pair of upright walls apart from each other.

[0004] A conventional technique for connecting the above-described electric wire and terminal is ultrasonic bonding, which bonds the electric wire and terminal using ultrasonic vibrations, as described in Patent Document 1. In conventional ultrasonic bonding, as described in Patent Document 1, the exposed conductor portion of the electric wire exposed from the insulating sheath is compressed while being pressed against the terminal. This causes tension in a portion of the exposed conductor portion, pulling it toward the terminal and the insulating sheath. As a result, at least some of the multiple elemental wires that make up the conductor are prone to break in the portion of the exposed conductor portion on the terminal side, i.e., so-called elemental wire breakage. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-18597 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present disclosure is to provide an electric wire with a terminal, a manufacturing method thereof, and an electric wire with a connector, which can suppress wire breakage even when the electric wire and the terminal are joined by ultrasonic joining. [Means for solving the problem]

[0007] [1] An electric wire with a terminal, in which an exposed conductor portion exposed from the insulating coating of an electric wire having a conductor and an insulating coating covering the outer periphery of the conductor is joined to a main body of a terminal, wherein, when viewed in a longitudinal cross section of the electric wire including the main body along the longitudinal direction of the conductor, the tip of the exposed conductor portion has a joining surface portion that joins with the main body and a non-joining surface portion that faces the joining surface portion and does not join with the main body, and a length L1 between the non-joining surface portion and a tip edge portion of the insulating coating on the non-joining surface portion side, parallel to the longitudinal direction of the conductor, is longer than a length L2 between the joining surface portion and a tip edge portion of the insulating coating on the joining surface portion side, parallel to the longitudinal direction of the conductor. [2] The electric wire with terminal according to the above [1], wherein, when viewed in the longitudinal cross section, the angle α formed by the straight line connecting the leading edge portion of the insulating coating portion on the non-joining surface side and the leading edge portion of the insulating coating portion on the joining surface side and the longitudinal direction of the conductor is 75 degrees or less. [3] The electric wire with terminal according to the above [1], wherein, when viewed in the longitudinal cross section, the angle α formed by the straight line connecting the leading edge portion of the insulating coating portion on the non-joining surface side and the leading edge portion of the insulating coating portion on the joining surface side and the longitudinal direction of the conductor is 15 degrees or more. [4] The electric wire with terminal according to any one of the above [1] to [3], further comprising a resin layer covering the entire surface of the exposed conductor portion. [5] A method for manufacturing an electric wire with a terminal, in which an exposed conductor portion exposed from an insulating coating portion of an electric wire having a conductor and an insulating coating portion covering the outer periphery of the conductor is joined to a main body portion of a terminal, wherein, when viewed in a longitudinal cross section of the electric wire including the main body portion along the longitudinal direction of the conductor, a tip of the exposed conductor portion has a contact surface portion that contacts the main body portion and a non-contact surface portion that faces the contact surface portion and does not contact the main body portion, and ultrasonic vibrations are applied to the exposed conductor portion and the main body portion while pressurizing the exposed conductor portion of the conductor and the main body portion of the terminal, to join the exposed conductor portion to the main body portion, in a state in which a length L3 between the non-contact surface portion and a tip edge portion of the insulating coating on the non-contact surface portion side, parallel to the longitudinal direction of the conductor, is longer than a length L4 between the contact surface portion and a tip edge portion of the insulating coating on the contact surface portion side, parallel to the longitudinal direction of the conductor. [6] An electric wire with a connector, comprising: the electric wire with a terminal according to any one of the above [1] to [4]; and a connector housing that accommodates at least the terminal of the electric wire with a terminal. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide an electric wire with a terminal, a manufacturing method thereof, and an electric wire with a connector, which are capable of suppressing wire breakage even when an electric wire and a terminal are joined by ultrasonic joining. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing an example of an electric wire with a terminal according to an embodiment. [Figure 2] FIG. 2 is an enlarged vertical cross-sectional view showing an example of an electric wire with a terminal according to an embodiment. [Figure 3] FIG. 3 is an enlarged vertical cross-sectional view showing another example of the insulating coating portion constituting the electric wire with terminal according to the embodiment. [Figure 4] FIG. 4 is an enlarged vertical cross-sectional view showing another example of the insulating coating portion constituting the electric wire with terminal according to the embodiment. [Figure 5]FIG. 5 is an enlarged vertical cross-sectional view showing an example of a method for manufacturing an electric wire with a terminal according to an embodiment. [Figure 6] FIG. 6 is a perspective view showing an example of a connector-attached electric wire according to an embodiment. [Figure 7] FIG. 7 is a perspective view showing an example of a connection portion of a terminal. [Figure 8] FIG. 8 is a perspective view showing another example of the electric wire with terminal according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a detailed description will be given based on an embodiment.

[0011] As a result of extensive research into electric wires with terminals, the inventors discovered that by forming the tip of the insulating coating portion that constitutes the electric wire into a predetermined shape, it is possible to suppress wire breakage even when the electric wire and terminal are joined by ultrasonic joining, and have completed the present disclosure based on this finding.

[0012] The electric wire with terminal according to the embodiment includes an electric wire and an insulating coating covering the outer periphery of the electric wire, and the exposed conductor portion exposed from the insulating coating is joined to the main body of the terminal. When viewed in a longitudinal cross section of the electric wire including the main body along the longitudinal direction of the conductor, the tip of the exposed conductor portion has a joining surface portion that joins with the main body and a non-joining surface portion that faces the joining surface portion and does not join with the main body. A length L1, measured parallel to the longitudinal direction of the conductor, between the non-joining surface portion and a leading edge of the insulating coating on the non-joining surface portion side is longer than a length L2, measured parallel to the longitudinal direction of the conductor, between the joining surface portion and a leading edge of the insulating coating on the joining surface portion side.

[0013] A method for manufacturing an electric wire with a terminal according to an embodiment is a method for manufacturing an electric wire with a terminal, in which an exposed conductor portion exposed from the insulating coating of an electric wire including an insulating coating covering an outer periphery of the conductor is joined to a main body of a terminal. The method for manufacturing an electric wire with a terminal includes: joining the exposed conductor portion to a main body of a terminal; and applying ultrasonic vibrations to the exposed conductor portion and the main body of a terminal while applying pressure to the exposed conductor portion and the main body of a terminal in a state in which, as viewed in a longitudinal cross section of the electric wire including the main body along the longitudinal direction of the conductor, the tip of the exposed conductor portion has a contact surface portion that contacts the main body and a non-contact surface portion that faces the contact surface portion and does not contact the main body; and joining the exposed conductor portion to the main body while applying ultrasonic vibrations to the exposed conductor portion and the main body of a terminal in a state in which a length L3 between the non-contact surface portion and a leading edge of the insulating coating on the non-contact surface portion side, as measured parallel to the longitudinal direction of the conductor, is longer than a length L4 between the contact surface portion and the leading edge of the insulating coating on the contact surface portion side, as measured parallel to the longitudinal direction of the conductor.

[0014] First, an electric wire with terminal according to an embodiment will be described. Fig. 1 is a perspective view showing an example of an electric wire with terminal according to an embodiment. Fig. 2 is an enlarged vertical cross-sectional view showing an example of an electric wire with terminal according to an embodiment. As shown in Figs. 1 and 2, an electric wire with terminal 1 includes an electric wire 2 and a terminal 3, and a conductor 22 of the electric wire 2 is joined to a main body 31 of the terminal 3.

[0015] The electric wire 2 includes a conductor 22 and an insulating coating 23 that covers the outer periphery of the conductor 22. A sheath (not shown) that covers the outer periphery of the insulating coating 23 is provided outside the insulating coating 23. At one end side of the electric wire 2 (the left end side in FIG. 1 ), the insulating coating 23 that covers the outer periphery of the conductor 22 and the sheath (not shown) that covers the outer periphery of the insulating coating 23 are stripped from the electric wire 2, exposing the conductor 22.

[0016] The conductor 22 of the electric wire 2 may be made up of a plurality of element wires 21 as shown in Fig. 1, or may be made up of a single element wire 21. When the conductor 22 is made up of a plurality of element wires 21, the conductor 22 may be a stranded wire in which the plurality of element wires 21 are twisted together, or may be a bundled wire in which the plurality of element wires 21 are bundled together.

[0017] The terminal 3 includes a main body 31. The main body 31 is a joining member that joins with an exposed conductor portion 220 of the conductor 22 that constitutes the electric wire 2. The terminal 3 may also include a connection portion 32 that connects with a conductor member C described below. The connection portion 32 is provided with an opening 32a into which the conductor member C can be inserted.

[0018] An exposed conductor portion 220 exposed from the insulating coating portion 23 at one end of the electric wire 2 is joined to the main body 31 of the terminal 3. In this way, the electric wire 2 and the terminal 3 are electrically connected.

[0019] In the terminal 3, the main body portion 31 and the connection portion 32 may be indirectly connected via a connecting portion 33 as shown in the figure, or may be directly connected without the connecting portion 33 being interposed therebetween.

[0020] 2, in the electric wire with terminal 1, when viewed in a vertical cross section of the electric wire 2 including the main body 31 along the longitudinal direction of the conductor 22, the tip of the exposed conductor portion 220 exposed from the insulating coating portion 23 of the conductor 22 has a joining surface portion 22a that joins with the main body 31 of the terminal 3 and a non-joining surface portion 22b that faces the joining surface portion 22a and does not join with the main body 31. In FIG. 2, the joining surface portion 22a is the lower surface of the tip portion of the exposed conductor portion 220, and the non-joining surface portion 22b is the upper surface of the tip portion of the exposed conductor portion 220.

[0021] The joint surface portion 22a of the conductor 22 is electrically joined to the main body portion 31 of the terminal 3. The tip portion of the exposed conductor portion 220, including the joint surface portion 22a and the non-joined surface portion 22b, is the portion that is pressurized (compressed) in the manufacturing method of the electric wire with terminal 1 described below, and the portion of the exposed conductor portion 220 on the insulating coating portion 23 side from the tip portion is the portion that is not pressurized.

[0022] 2, in a longitudinal cross section of the electric wire 2 including the main body 31 along the longitudinal direction of the conductor 22, a length L1 between the non-joined surface portion 22b and the leading edge 23b of the insulating coating portion 23 on the non-joined surface portion 22b side is longer than a length L2 between the joining surface portion 22a and the leading edge 23a of the insulating coating portion 23 on the joining surface portion 22a side. The lengths L1 and L2 are not the lengths of lines connecting each point, but are lengths parallel to the longitudinal direction of the conductor 22. In other words, the length L1 is the length between the leading edge 23b and the portion of the non-joined surface portion 22b closest to the leading edge 23b, and the length L2 is the length between the leading edge 23a and the portion of the joining surface portion 22a closest to the leading edge 23a.

[0023] 2, the leading edge 23b of the insulating coating portion 23 on the non-bonding surface portion 22b side is the upper leading edge of the insulating coating portion 23, and the leading edge 23a of the insulating coating portion 23 on the bonding surface portion 22a side is the lower leading edge of the insulating coating portion 23. Therefore, in FIG. 2, the length L1 is the length between the right end portion of the non-bonding surface portion 22b and the upper leading edge 23b of the insulating coating portion 23, and the length L2 is the length between the right end portion of the bonding surface portion 22a and the lower leading edge 23a of the insulating coating portion 23.

[0024] When length L1 is greater than length L2, the length of the straight line connecting tip edge 23b with the portion of non-joint surface portion 22b closest to tip edge 23b, i.e., the exposed portion of exposed conductor portion 220 that is not pressurized, becomes longer than when length L1 and length L2 are the same. This reduces the tension that is generated in this exposed portion and that pulls toward terminal 3 and insulating coating portion 23, thereby preventing wire breakage in exposed conductor portion 220.

[0025] Furthermore, when length L1 is greater than length L2, the viewing angle is larger than when lengths L1 and L2 are the same, making it easier to check whether the insulating coating of the electric wire with terminal 1 is engaged. This facilitates inspection. Furthermore, the orientation of the electric wire with terminal 1, for example, the up-down orientation, can be determined by looking at the insulating coating 23 without looking at the terminal 3.

[0026] 2, in a longitudinal cross section of the electric wire 2 including the main body 31 along the longitudinal direction of the conductor 22, the angle α formed by the straight line connecting the leading edge 23b of the insulating coating 23 on the non-joining surface 22b side and the leading edge 23a of the insulating coating 23 on the joining surface 22a side with the longitudinal direction of the conductor 22 is preferably 75 degrees or less, and more preferably 60 degrees or less. When the angle α is 75 degrees or less, wire breakage in the exposed conductor portion 220 can be further suppressed and stress on the wiring can be reduced.

[0027] Furthermore, the angle α is preferably equal to or greater than 15 degrees, more preferably equal to or greater than 30 degrees, and even more preferably equal to or greater than 45 degrees. When the angle α is equal to or greater than 15 degrees, it is possible to improve difficulties in workability, such as the increase in the size of the housing, the difficulty in removing the insulating coating portion 23 so as to satisfy the angle α, and the difficulty (or in some cases the impossibility) of fitting into a housing of a predetermined size.

[0028] Furthermore, the shape of the end face 24 at the tip of the insulating coating portion 23 is not particularly limited as long as the length L1 is greater than the length L2, and may be linear as shown in FIG. 2, curved as shown in FIG. 3, or may have one or more corners as shown in FIG. 4.

[0029] Furthermore, when the terminal 3 and the conductor 22 are made of different materials, for example, when the terminal 3 is made of copper or a copper alloy and the conductor 22 is made of aluminum or an aluminum alloy, the electric wire with terminal 1 preferably further includes a resin layer (not shown) that covers the entire surface of the exposed conductor portion 220. When the electric wire with terminal 1 includes a resin layer, corrosion protection of the exposed conductor portion 220 can be suppressed.

[0030] Next, a method for manufacturing an electric wire with terminal according to an embodiment will be described. Fig. 5 is an enlarged vertical cross-sectional view showing an example of a method for manufacturing an electric wire with terminal according to an embodiment.

[0031] In the manufacturing method of the electric wire with terminal 1, as shown in FIG. 5 , when viewed in a vertical cross section of the electric wire 2 including the main body portion 31 along the longitudinal direction of the conductor 22, the tip of the exposed conductor portion 220 has a contact surface portion 22c that contacts the main body portion 31 and a non-contact surface portion 22d that faces the contact surface portion 22c and does not contact the main body portion 31, and while applying pressure to the exposed conductor portion 220 of the conductor 22 and the main body portion 31 of the terminal 3, ultrasonic vibrations are applied to the exposed conductor portion 220 and the main body portion 31 to join the exposed conductor portion 220 and the main body portion 31 in a state in which a length L3, parallel to the longitudinal direction of the conductor 22, between the non-contact surface portion 22d and the tip edge portion 23d of the insulating coating portion 23 on the non-contact surface portion 22d side is longer than a length L4, parallel to the longitudinal direction of the conductor 22, between the contact surface portion 22c and the tip edge portion 23c of the insulating coating portion 23 on the contact surface portion 22c side.

[0032] When pressure is applied, the tip portion of exposed conductor portion 220, including contact surface portion 22c and non-contact surface portion 22d, is the portion that is compressed, and the portion of exposed conductor portion 220 on the insulating coating portion 23 side from the tip portion is the portion that is not compressed. When the electric wire 2 and terminal 3 are joined by ultrasonic joining, contact surface portion 22c becomes joining surface portion 22a of electric wire with terminal 1, and non-contact surface portion 22d becomes non-joining surface portion 22b of electric wire with terminal 1. In this way, electric wire with terminal 1 can be manufactured.

[0033] If length L3 is greater than length L4 during ultrasonic bonding, the tension generated in exposed conductor portion 220 can be alleviated as described above, and wire breakage in exposed conductor portion 220 can be suppressed.

[0034] 5, in a longitudinal cross section of the electric wire 2 including the main body 31 along the longitudinal direction of the conductor 22, the angle β formed by the straight line connecting the leading edge 23d on the non-contact surface 22d side of the insulating coating 23 to the leading edge 23c on the contact surface 22c side of the insulating coating 23 with the longitudinal direction of the conductor 22 is preferably 75 degrees or less, and more preferably 60 degrees or less. When the angle β is 75 degrees or less, wire breakage in the exposed conductor portion 220 can be further suppressed and stress on the wiring can be reduced.

[0035] Furthermore, the angle β is preferably equal to or greater than 15 degrees, more preferably equal to or greater than 30 degrees, and even more preferably equal to or greater than 45 degrees. When the angle β is equal to or greater than 15 degrees, it is possible to improve difficulties in workability, such as an increase in the size of the housing, difficulty in removing the insulating coating portion 23 so as to satisfy the angle β, and difficulty in fitting the connector into a housing of a predetermined size (or in some cases, inability to fit the connector into such a housing).

[0036] Next, a connector-equipped electric wire according to an embodiment will be described. Fig. 6 is a perspective view showing an example of a connector-equipped electric wire according to an embodiment.

[0037] 6, the connector-attached electric wire 4 includes a connector housing 51 that accommodates the terminal-attached electric wire 1 and at least the terminal 3 of the terminal-attached electric wire 1. The connector housing 51 of the connector 5 is provided with an opening 51a through which the conductor member C, such as a bus bar, can be inserted from the outside to the inside of the connector housing 51 so that the conductor member C can be electrically connected to a connecting member (not shown) in the connection portion 32. The connector housing 51 also has an insertion portion 51b through which the electric wire 2 is inserted.

[0038] The electric wire with terminal 1 and the electric wire with connector 4, which can suppress wire breakage even when the electric wire 2 and the terminal 3 are joined by ultrasonic bonding, can suppress the above-mentioned tension compared to conventional technology even after being mounted on a vehicle, and are therefore suitable for use in vehicles because they are effective in suppressing wire breakage even against loads such as vehicle vibrations.

[0039] According to the embodiment described above, by making the length L1 of the tip shape of the insulating coating portion constituting the electric wire longer than the length L2, it is possible to prevent wire breakage even when the electric wire and the terminal are joined by ultrasonic joining.

[0040] In the above, an example is shown in which, when viewed in a vertical cross section of the electric wire 2, the tip edge portion 23a of the insulating coating portion 23 and the main body portion 31 of the terminal 3 are not in contact with each other, but the tip edge portion 23a of the insulating coating portion 23 and the main body portion 31 of the terminal 3 may be in contact with each other.

[0041] Furthermore, while the above description shows an example in which the connecting portion 32 is configured with an opening 32a into which the conductor member C can be inserted, the connecting portion 32 may also be flat, as shown in Fig. 7. When the connecting portion 32 is flat, the connecting portion 32 may have a through-hole 32b that penetrates from one main surface to the other main surface. A fastening member (not shown), such as a bolt, can be inserted into the through-hole 32b to mechanically and electrically connect the connecting portion 32 of the terminal 3 to a connecting member (not shown).

[0042] 8, the electric wire with terminal 1 may further include a rubber tube 6. The rubber tube 6 covers at least the outer surface of the electric wire 2 from the exposed conductor portion 220 of the conductor 22 to the main body 31 of the terminal 3. An interior adhesive (not shown) may be provided on the inner surface of the rubber tube 6 to improve adhesion between the rubber tube 6 and the exposed conductor portion 220 and between the rubber tube 6 and the main body 31. By including the rubber tube 6 in the electric wire with terminal 1, the waterproofing properties of the portion covered with the rubber tube 6 can be improved.

[0043] Although the embodiments have been described above, the present invention is not limited to the above embodiments, but includes all aspects encompassed by the concept and scope of the claims of the present disclosure, and can be modified in various ways within the scope of the present disclosure. [Explanation of symbols]

[0044] 1: Wire with terminal 2: Electric wire 21: Wire 22: Conductor 220:Exposed conductor part 22a: Joint surface part 22b: Non-bonded surface area 22c: Contact surface area 22d: Non-contact surface area 23: Insulating coating 23a: Tip edge of the insulating coating on the joining surface side 23b: Tip edge of the insulating coating on the non-bonded surface side 23c: Tip edge of the insulating coating on the contact surface side 23d: Tip edge of the insulating coating on the non-contact surface side 24: End face 3: Terminal 31: Main body 32: Connection 32a: opening 32b: Through hole 33:Connection part 4: Wire with connector 5: Connector 51: Connector housing 51a: Opening 51b: Insertion part 6: Rubber tube C: Busbar

Claims

1. An electric wire with a terminal, the electric wire including a conductor and an insulating coating covering an outer periphery of the conductor, the exposed conductor portion exposed from the insulating coating being joined to a main body of a terminal, When viewed in a longitudinal cross section of the electric wire including the main body along the longitudinal direction of the conductor, a tip of the exposed conductor portion having a joining surface portion that joins with the main body portion and a non-joining surface portion that faces the joining surface portion and does not join with the main body portion; a length L1 between the non-joining surface portion and a leading edge portion of the insulating coating portion on the non-joining surface portion side, which is parallel to the longitudinal direction of the conductor, is longer than a length L2 between the joining surface portion and a leading edge portion of the insulating coating portion on the joining surface portion side, which is parallel to the longitudinal direction of the conductor; Wire with terminals.

2. 2. The electric wire with terminal according to claim 1, wherein, when viewed in the vertical cross section, an angle α formed between a straight line connecting a tip edge portion of the insulating coating portion on the non-joining surface portion side and a tip edge portion of the insulating coating portion on the joining surface portion side and a longitudinal direction of the conductor is 75 degrees or less.

3. 2. The electric wire with terminal according to claim 1, wherein, when viewed in the vertical cross section, an angle α formed between a straight line connecting a tip edge portion of the insulating coating portion on the non-joining surface portion side and a tip edge portion of the insulating coating portion on the joining surface portion side and a longitudinal direction of the conductor is 15 degrees or more.

4. The electric wire with terminal according to claim 1 , further comprising a resin layer covering the entire surface of the exposed conductor portion.

5. A method for manufacturing an electric wire with a terminal, the method comprising: joining an exposed conductor portion exposed from an insulating coating portion of an electric wire having a conductor wire and an insulating coating portion covering an outer periphery of the conductor wire to a main body of a terminal; When viewed in a longitudinal cross section of the electric wire including the main body along the longitudinal direction of the conductor, a tip of the exposed conductor portion having a contact surface portion that contacts the main body portion and a non-contact surface portion that faces the contact surface portion and does not contact the main body portion; a length L3 between the non-contact surface portion and a leading edge portion of the insulating coating portion on the non-contact surface portion side, which is parallel to the longitudinal direction of the conductor, is longer than a length L4 between the contact surface portion and a leading edge portion of the insulating coating portion on the contact surface portion side, which is parallel to the longitudinal direction of the conductor, A method for manufacturing an electric wire with a terminal, the method comprising: applying ultrasonic vibrations to the exposed conductor portion and the main body portion of the terminal while applying pressure to the exposed conductor portion and the main body portion of the terminal, thereby joining the exposed conductor portion and the main body portion.

6. The electric wire with terminal according to any one of claims 1 to 4, a connector housing that accommodates at least the terminals of the terminal-attached electric wire; A connector-equipped electric wire comprising:

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