Ultrasonic bonding apparatus and terminal-equipped electric wire

Abstract

To provide an ultrasonic bonding device capable of securing proper conduction performance at a bonding part between an electric wire and a terminal, and an electric wire with a terminal.SOLUTION: The ultrasonic joining device 100 includes the anvil 120 having the placement surface 121 and the horn 110 having the application surface 111, and the application surface 111 includes the application surface main body portion 112 and the application surface end portion inclined portion 113 that is located at the end portion on the side where the electrical wire 10 extends in the axial direction X and is formed by the concave curved surface that is separated from the placement surface 121 along the vertical direction Z toward the end 110a portion. The placement surface 121 includes a placement surface main body portion 122, and a placement surface end portion inclined portion 123 that is located at an end portion on the side where the electrical wire 10 extends in the axial direction X, faces the application surface end portion inclined portion 113 along the up-down direction Z, and is formed by a convex curved surface that approaches the application surface 111 side along the up-down direction Z toward the end 120a portion.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] For example, Patent Document 1 discloses an electric wire with a terminal, which includes a covered electric wire and a terminal connected to an end portion at the tip of the covered electric wire. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-188373 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the electric wire with terminal described in Patent Document 1, when the conductor portion of the electric wire is ultrasonically joined to the terminal, the angular shape of the end of the horn may come into contact with the core wire, potentially damaging the core wire, and in this case, there is a risk that an appropriate conductive area may not be secured between the electric wire and the terminal. Therefore, there is room for further improvement in the conductivity at the joint between the electric wire and the terminal.

[0005] The present invention has been made in consideration of the above circumstances, and aims to provide an ultrasonic joining device and an electric wire with a terminal that can ensure appropriate conductivity at the joining portion between an electric wire and a terminal. [Means for solving the problem]

[0006] In order to achieve the above object, an ultrasonic bonding device according to the present invention includes an anvil having a mounting surface on which a conductive terminal and an end of a conductor portion of a conductive electric wire are placed, and a horn arranged opposite to the anvil in a vertical direction and having an application surface for applying ultrasonic vibrations to the terminal arranged on the mounting surface and the conductor portion arranged on the terminal, wherein the application surface includes an application surface main body portion extending along an axial direction intersecting the vertical direction, and a horn positioned at an end on the side where the electric wire extends in the axial direction and gradually extending in the axial direction. and an application surface end inclined portion formed by a concave curved surface that is spaced apart from the placement surface along the up-down direction, and the placement surface is characterized in that it includes a placement surface main body that extends along the axial direction and faces the application surface main body along the up-down direction, and a placement surface end inclined portion that is located at the end on the side where the electric wire extends in the axial direction and faces the application surface end inclined portion along the up-down direction, and is formed by a convex curved surface that approaches the application surface along the up-down direction as it moves toward the end in the axial direction.

[0007] In order to achieve the above object, the electric wire with terminal of the present invention comprises an electric wire including a conductor portion made up of a plurality of conductive wires, an electrical connection portion electrically connected to an object to be connected, and a terminal including an electric wire connection portion to which the conductor portion is ultrasonically joined, wherein the electric wire connection portion includes a first straight portion extending from the electric connection portion, and a curved portion extending from the first straight portion to the opposite side of the electric connection portion and rising from the first straight portion toward the conductor portion. [Effects of the Invention]

[0008] The ultrasonic joining device and the electric wire with terminal according to the present invention have the effect of ensuring appropriate electrical conductivity at the joining portion between the electric wire and the terminal. [Brief explanation of the drawings]

[0009] [Figure 1]FIG. 1 is a diagram schematically illustrating an electric wire with a terminal according to the present embodiment. [Figure 2] FIG. 2 is a diagram schematically illustrating the ultrasonic bonding device according to the present embodiment and a terminal and an electric wire to be processed by the ultrasonic bonding device. [Figure 3] FIG. 3 is a diagram schematically illustrating a terminal and an electric wire processed by the ultrasonic bonding device according to this embodiment. [Figure 4] FIG. 4 is a diagram schematically illustrating an ultrasonic bonding device in which an inclined portion (inclined end portion of application surface) is provided only on the horn side. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments. Furthermore, the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially the same.

[0011] [Embodiment] First, the electric wire with terminal 1 of this embodiment will be described with reference to FIG. 1 . In the following description, of the first, second, and third directions that intersect with one another, the first direction will be referred to as the "axial direction X," the second direction will be referred to as the "left-right direction Y," and the third direction will be referred to as the "up-down direction Z." Here, the axial direction X, the left-right direction Y, and the up-down direction Z are perpendicular to one another. The axial direction X typically corresponds to the extension direction of the electric wire with terminal 1 and the front-back direction of the ultrasonic bonding device 100 that manufactures the electric wire with terminal 1. The left-right direction Y typically corresponds to the width direction of the terminal 20 of the electric wire with terminal 1 and the width direction of the ultrasonic bonding device 100 that manufactures the electric wire with terminal 1. The up-down direction Z corresponds to the vertical direction and typically corresponds to the thickness direction of the terminal 20 of the electric wire with terminal 1 and the height direction of the ultrasonic bonding device 100 that manufactures the electric wire with terminal 1. In addition, the upper side in the vertical direction will be referred to as the upper portion or upper side, and the lower side in the vertical direction will be referred to as the lower portion or lower side.

[0012] The electric wire with terminal 1 is applied to, for example, a wire harness used in a vehicle, etc. Here, the wire harness is, for example, an assembly component in which a plurality of electric wires W used for power supply and signal communication are bundled together to connect various devices mounted on a vehicle, and the plurality of electric wires 10 are connected to the respective devices using connectors, etc. As shown in Fig. 1 , the electric wire with terminal 1 includes an electric wire 10 and a terminal 20 joined to an end of the electric wire 10.

[0013] The electric wire 10 is arranged in a vehicle and electrically connects various devices. As shown in FIG. 1, the electric wire 10 is an insulated electric wire that includes a conductive conductor portion 11 (core wire) and an insulating insulating sheath portion 12, and the conductor portion 11 is sheathed by the insulating sheath portion 12. The conductor portion 11 here is a bundle of a plurality of conductive wires 11a. The insulating sheath portion 12 is formed by extrusion molding an insulating resin material (such as PP, PVC, or cross-linked PE, which is appropriately selected taking into consideration abrasion resistance, chemical resistance, heat resistance, etc.). The conductor portion 11 may also be formed by twisting a plurality of wires 11a together.

[0014] The electric wire 10 extends linearly along the axial direction X, and the cross-sectional shape of the conductor portion 11 (cross-sectional shape in a direction intersecting the axial direction X, which is the extension direction of the electric wire 10) is substantially circular, and the cross-sectional shape of the insulating coating portion 12 is substantially annular, resulting in a substantially circular cross-sectional shape overall. As shown in Fig. 1 , the insulating coating portion 12 of the electric wire 10 is stripped off at least one end, and a terminal 20 is provided at an exposed conductor portion 13 where the conductor portion 11 is exposed from the end of the insulating coating portion 12.

[0015] The terminal 20 is electrically connected to the electric wire 10 and is connected to a conductive connection object. The terminal 20 includes an electric connection portion 21 and an electric wire connection portion 22, as shown in FIG.

[0016] Furthermore, the terminal 20 is formed by forming a single sheet metal made of a conductive metal into a shape corresponding to each part by various processes such as punching, pressing, bending, etc. Therefore, in the terminal 20 of this embodiment, the electrical connection part 21 and the wire connection part 22 are formed integrally and are connected to each other along the axial direction X.

[0017] The electrical connection portion 21 is a portion that is electrically connected to a connection object. As an example, the electrical connection portion 21 of this embodiment is formed in the shape of a round terminal (LA terminal) and is provided with a through-hole (not shown). The terminal 20 formed in this manner is electrically connected to the connection object by, for example, inserting a fastening member such as a bolt through the through-hole of the electrical connection portion 21 and the through-hole of the electrical connection portion of the connection object, and fixing the electrical connection portion of the connection object to the electrical connection portion 21. The shape of the electrical connection portion 21 is not particularly limited, and the connection format of the terminal 20 with the connection object is not particularly limited.

[0018] The electric wire connection part 22 is provided at one end side of the electrical connection part 21, opposite to the side electrically connected to the connection object, and is the part to which the electric wire 10 is connected. As shown in Fig. 1, the electric wire connection part 22 of this embodiment is formed in a plate shape as a whole.

[0019] 1, the electric wire connection portion 22 includes a first straight portion 23, a curved portion 24, and a second straight portion 25. The electric wire connection portion 22 is arranged in the axial direction X from one side to the other in the order of the first straight portion 23, the curved portion 24, and the second straight portion 25, and these portions are connected to each other.

[0020] The first straight region 23 is a portion extending from the electrical connection portion 21 and is a main portion of the electric wire connection portion 22. As shown in FIG. 1 , the first straight region 23 of this embodiment is formed linearly along the axial direction X. The first straight region 23 is electrically connected to the electric wire 10 by ultrasonically joining the tip portion of the conductor exposed portion 13. Note that the size of the first straight region 23 is not particularly limited, but it is preferable that the length of the first straight region 23 in the axial direction X be set longer than the length of the curved region 24 in the axial direction X and the length of the second straight region 25 in the axial direction X.

[0021] The curved portion 24 extends from the first straight portion 23 to the opposite side of the electrical connection portion 21, and is a portion that rises from the first straight portion 23 toward the conductor portion 11. As shown in FIG. 1 , the curved portion 24 in this embodiment is located at an end portion on one end side of the electric wire connection portion 22 (the side on which the electric wire 10 extends in the axial direction X), and is formed in a shape that is bent and curved toward the surface side on which the conductor portion 11 is arranged along the up-down direction Z, which is the plate thickness direction of the first straight portion 23.

[0022] The second straight portion 25 is a portion that extends from the curved portion 24 to the opposite side to the first straight portion 23 and is positioned with a step from the first straight portion 23. As shown in Fig. 1 , the second straight portion 25 in this embodiment is located at an end portion on one end side of the electric wire connection portion 22 (the side on which the electric wire 10 extends in the axial direction X), and is formed offset from the first straight portion 23 toward the surface side on which the conductor portion 11 is disposed in the up-down direction Z which is the plate thickness direction of the first straight portion 23. The curved portion 24 and the second straight portion 25 described above are electrically connected to the electric wire 10 by ultrasonically joining the base portions of the conductor exposed portions 13.

[0023] The electric wire with terminal 1 configured as described above is manufactured by ultrasonically bonding the conductor portion 11 of the electric wire 10 and the terminal 20 using an ultrasonic bonding device 100 shown in Fig. 2 etc. The ultrasonic bonding device 100 of this embodiment has an inclined portion (application surface end inclined portion 113 described later) at the end of the horn 110 (the end on the side where the electric wire 10 extends in the axial direction X), and also has an inclined portion (placement surface end inclined portion 123 described later) at the end of the anvil 120 positioned opposite the end of the horn 110, thereby realizing a configuration that can ensure appropriate conductivity at the bonding portion between the electric wire 10 and the terminal 20. Hereinafter, the configuration of the ultrasonic bonding device 100 will be described in detail with reference to Figs. 2 and 3.

[0024] The ultrasonic bonding device 100 ultrasonically bonds the end of the conductor portion 11 to the terminal 20. As shown in Figs. 2 and 3, the ultrasonic bonding device 100 includes a horn 110 and an anvil 120. For ease of explanation, Figs. 2 and 3 do not show support members that support the horn 110 and the anvil 120, or mechanisms that move them. In the following explanation, the term "end" means the end, and the term "edge" means a certain range from the edge.

[0025] The horn 110 transmits ultrasonic vibrations to the components to be ultrasonically joined. As shown in FIG. 2, the horn 110 of this embodiment faces the anvil 120 in the vertical direction Z and is disposed above the anvil 120. As shown in FIG. 3, the horn 110 moves downward (toward the anvil 120) and sandwiches the terminal 20 and the end of the conductor portion 11 between the horn 110 and the anvil 120, thereby applying pressure to the end of the conductor portion 11 against the terminal 20. As shown in FIG. 3, the horn 110 applies ultrasonic vibrations while contacting and applying pressure to the conductor portion 11, thereby transmitting the ultrasonic vibrations to the joining portion between the electric wire 10 and the terminal 20. The pressure direction of the horn 110 is indicated by the arrow D1 in FIG. 3, which is a direction from the top to the bottom. The vibration direction of the horn 110 is indicated by the arrow D2 in FIG. 3, which is a direction along the axial direction X.

[0026] 2 and 3, horn 110 has application surface 111 that applies ultrasonic vibrations to terminal 20 and the end of conductor portion 11 arranged on terminal 20. Application surface 111 comes into contact with conductor portion 11 with terminal 20 and the end of conductor portion 11 sandwiched between application surface 111 and anvil 120.

[0027] 2 and 3, the application surface 111 includes an application surface main body 112 and an application surface end inclined portion 113. The application surface 111 is formed such that the application surface main body 112 and the application surface end inclined portion 113 are continuously formed from one side to the other along the axial direction X. The application surface 111 can ultrasonically join the electric wire 10 and the terminal 20 by applying ultrasonic vibrations to the conductor portion 11 while the application surface main body 112 and the application surface end inclined portion 113 are in contact with the conductor portion 11 and applying pressure to the conductor portion 11.

[0028] The application surface main body 112 is a main part of the application surface 111. As shown in FIGS. 2 and 3, the application surface main body 112 of this embodiment is formed linearly along the axial direction X. The application surface main body 112 also has a plurality of protrusions 111a. As shown in FIGS. 2 and 3, the protrusions 111a are formed continuously along the axial direction X. The protrusions 111a are formed tapered downward and have the same height in the vertical direction Z. Therefore, as shown in FIG. 3, the application surface main body 112 applies ultrasonic vibrations by vibrating the plurality of protrusions 111a while contacting them with the surface of the conductor portion 11.

[0029] The application surface end inclined portion 113 is a portion rising upward from the application surface main body portion 112. As shown in FIGS. 2 and 3 , the application surface end inclined portion 113 of this embodiment is located at an end on one end side of the application surface main body portion 112 (the side on which the electric wire 10 extends in the axial direction X), and is formed by a concave curved surface that moves away from the mounting surface 121 of the anvil 120 (the mounting surface 121 will be described later) along the vertical direction Z toward the end of the axial direction X of the application surface 111 (i.e., the end 110a of the horn 110 in the axial direction X). Furthermore, the application surface end inclined portion 113 does not have the protrusions 111a described above. Therefore, as shown in FIG. 3 , the application surface end inclined portion 113 applies ultrasonic vibration by vibrating a flat surface (a surface on which the protrusions 111a are not formed) in contact with the surface of the conductor portion 11.

[0030] The anvil 120 is a platform that receives the components to be ultrasonically bonded. As shown in Fig. 2, the anvil 120 of this embodiment faces the horn 110 in the up-down direction Z and is disposed below the horn 110. As shown in Fig. 3, when the terminal 20 and the end of the conductor portion 11 are sandwiched between the anvil 120 and the horn 110, the anvil 120 receives the load transmitted from the horn 110 to the terminal 20, thereby pressing the end of the conductor portion 11 against the terminal 20 to apply pressure.

[0031] 2 and 3, the anvil 120 has a mounting surface 121 on which the terminal 20 and the end of the conductor portion 11 are placed. The mounting surface 121 comes into contact with the terminal 20 with the terminal 20 and the end of the conductor portion 11 sandwiched between the anvil 120 and the horn 110.

[0032] 2 and 3, the placing surface 121 is configured to include a placing surface main body portion 122, a placing surface end inclined portion 123, and a placing surface end flat portion 124. The placing surface 121 is configured such that the placing surface main body portion 122, the placing surface end inclined portion 123, and the placing surface end flat portion 124 are continuously formed from one side to the other along the axial direction X. The placing surface 121 is arranged with the above-described first straight portion 23, the curved portion 24, and the second straight portion 25 in contact with the placing surface main body portion 122, the placing surface end inclined portion 123, and the placing surface end flat portion 124, respectively.

[0033] The mounting surface main body portion 122 is a main portion of the mounting surface 121. As shown in FIGS. 2 and 3, the mounting surface main body portion 122 of this embodiment is formed linearly along the axial direction X. The mounting surface main body portion 122 also has a plurality of protrusions 121a. As shown in FIGS. 2 and 3, the protrusions 121a are formed continuously along the axial direction X. The protrusions 121a are formed to taper upward and have the same height in the vertical direction Z. Therefore, as shown in FIG. 3, the mounting surface main body portion 122 can place the first straight portion 23 of the terminal 20 by bringing the plurality of protrusions 121a into contact with the surface of the first straight portion 23 of the terminal 20.

[0034] The mounting surface end inclined portion 123 is a portion rising upward from the mounting surface main body portion 122. As shown in FIGS. 2 and 3 , the mounting surface main body portion 122 of this embodiment is located at one end side of the mounting surface main body portion 122 (the side on which the electric wire 10 extends in the axial direction X), and is formed by a concave curved surface that approaches the application surface 111 of the horn 110 along the vertical direction Z toward the end of the axial direction X of the mounting surface 121 (i.e., the end 120a of the anvil 120 in the axial direction X). Furthermore, the mounting surface end inclined portion 123 does not have the protrusion 121a described above. Therefore, as shown in FIG. 3 , the mounting surface end inclined portion 123 allows the curved portion 24 of the terminal 20 to be placed thereon by bringing the flat surface (the surface on which the protrusion 121a is not formed) into contact with the surface of the curved portion 24 of the terminal 20.

[0035] The curvature of the curved surface of the inclined end portion 123 of the mounting surface is equivalent to the curvature of the curved surface of the inclined end portion 113 of the application surface. The curvature of the curved surface of the inclined end portion 123 of the mounting surface is equivalent to the curvature of the curved portion 24 of the terminal 20. Therefore, as shown in FIGS. 2 and 3 , the inclined end portion 123 of the mounting surface in this embodiment is determined to match the shape of the inclined end portion 113 of the application surface. Furthermore, by determining the shape of the curved portion 24 of the terminal 20 to match the shape of the inclined end portion 123 of the mounting surface, the terminal 20 can be positioned at an appropriate position with respect to the mounting surface 121. Furthermore, since the shape of the inclined end portion 113 of the application surface, the shape of the inclined end portion 123 of the mounting surface, and the shape of the curved portion 24 of the terminal 20 are equivalent to each other, the distance between the horn 110 and the anvil 120 during ultrasonic bonding can be kept constant.

[0036] 4, if application surface end inclined portion 113 is provided on the horn 110 side, and application surface end inclined portion 123 is not provided on the anvil 120A side, and placement surface 121 is configured only with placement surface main body portion 122, the distance of application surface end inclined portion 113 from placement surface main body portion 122 will be longer than the distance of application surface end inclined portion 113 from placement surface main body portion 122. Therefore, when ultrasonically joining electric wire 10 and terminal 20 using horn 110 and anvil 120A shown in FIG. 4, in region R where conductor portion 11 is sandwiched between application surface end inclined portion 113 and placement surface main body portion 122 and pressed against terminal 20, the load received from horn 110 will be attenuated compared to other regions, and as a result, there is a risk that the joining strength, etc., of region R will be reduced compared to other regions.

[0037] 2 and 3, when the terminal 20 and the conductor portion 11 are ultrasonically joined using the horn 110 and the anvil 120 of this embodiment, the distance between the horn 110 and the anvil 120 can be kept constant, which prevents the load that the region R receives from the horn 110 from attenuating compared to other regions. Therefore, the ultrasonic joining device 100 of this embodiment can improve the joining strength between the electric wire 10 and the terminal 20.

[0038] The ultrasonic joining device 100 described above comprises an anvil 120 having a mounting surface 121 on which a conductive terminal 20 and an end of a conductor portion 11 of a conductive electric wire 10 are placed, and a horn 110 arranged opposite the anvil 120 in the vertical direction Z and having an application surface 111 that applies ultrasonic vibrations to the terminal 20 arranged on the mounting surface 121 and the conductor portion 11 arranged on the terminal 20. The application surface 111 is configured to include an application surface main body 112 extending along an axial direction X intersecting with the vertical direction Z, and an application surface end inclined portion 113 located at the end of the side where the electric wire 10 extends in the axial direction X and formed by a concave curved surface that moves away from the placing surface 121 along the vertical direction Z as it moves toward the end 110a in the axial direction X. The placing surface 121 is configured to include a placing surface main body 122 extending along the axial direction X and facing the application surface main body 112 along the vertical direction Z, and a placing surface end inclined portion 123 located at the end of the side where the electric wire 10 extends in the axial direction X and facing the application surface end inclined portion 113 along the vertical direction Z, and formed by a convex curved surface that moves closer to the application surface 111 along the vertical direction Z as it moves toward the end 120a in the axial direction X. The electric wire with terminal 1, in which the electric wire 10 and the terminal 20 are joined by the ultrasonic joining device 100 described above, comprises the electric wire 10 including a conductor portion 11 made up of a plurality of conductive wires, an electrical connection portion 21 electrically connected to an object to be connected, and a terminal 20 including an electric wire connection portion 22 to which the conductor portion 11 is ultrasonically joined. The electric wire connection portion 22 includes a first straight portion 23 extending from the electric connection portion 21, and a curved portion 24 extending from the first straight portion 23 to the opposite side of the electric connection portion 21 and rising from the first straight portion 23 toward the conductor portion 11.

[0039] With this configuration, the ultrasonic bonding device 100 provides an inclined portion (applied surface end inclined portion 113) at the end of the horn 110, thereby preventing the conductor 11 from being damaged when the end of the horn 110 vibrates while in contact with the surface of the conductor 11 during ultrasonic bonding. Furthermore, the ultrasonic bonding device 100 also provides an inclined portion (placement surface end inclined portion 123) at the end of the anvil 120, which is positioned opposite the end of the horn 110, thereby preventing attenuation of the load applied to the terminal 20 and the conductor 11 sandwiched between the applied surface end inclined portion 113 and the placement surface main body 122 during ultrasonic bonding. Therefore, the ultrasonic bonding device 100 can prevent a decrease in the adhesive strength of the conductor 11 of the electric wire 10 to the terminal 20, thereby enabling proper ultrasonic bonding of the electric wire 10 and the terminal 20. Therefore, the ultrasonic bonding device 100 and the electric wire with terminal 1 of this embodiment can ensure appropriate electrical conduction performance at the bonding portion between the electric wire 10 and the terminal 20.

[0040] Furthermore, the ultrasonic bonding device 100 can shorten the time required for ultrasonic bonding by preventing attenuation of the load applied to the terminal 20 and the conductor portion 11 sandwiched between the application surface end inclined portion 113 and the placement surface main body portion 122. Furthermore, the electric wire with terminal 1 in which the electric wire 10 and the terminal 20 are joined by the ultrasonic bonding device 100 can be manufactured more inexpensively than the conventional electric wire with terminal 1 because the electric wire 10 and the terminal 20 are joined by a simple process.

[0041] Furthermore, the mounting surface 121 of the anvil 120 described above further includes a mounting surface end flat portion 124 that extends from the mounting surface end inclined portion 123 to the end 120a on the side where the electric wire 10 extends along the axial direction X and is located closer to the application surface 111 in the vertical direction Z than the mounting surface main body portion 122. Furthermore, the wire connection portion 22 of the terminal 20 constituting the terminal-attached electric wire 1 described above further includes a second straight portion 25 that extends from the curved portion 24 to the opposite side from the first straight portion 23 and is located at a step from the first straight portion 23. With this configuration, the ultrasonic bonding device 100 can appropriately suppress movement of the terminal 20 placed on the mounting surface 121 in the vibration direction (direction along the axial direction X) due to vibration of the horn 110 during ultrasonic bonding. Therefore, the ultrasonic bonding device 100 can more appropriately ultrasonically bond the electric wire 10 and the terminal 20. Therefore, the ultrasonic bonding device 100 and the electric wire with terminal 1 of this embodiment can ensure appropriate electrical conduction performance at the bonding portion between the electric wire 10 and the terminal 20.

[0042] Furthermore, the curvature of the curved surface of the inclined end portion 123 of the mounting surface described above is equal to the curvature of the curved surface of the inclined end portion 113 of the application surface. With this configuration, the ultrasonic bonding device 100 has the inclined end portion 123 of the mounting surface of the anvil 120 shaped to match the inclined end portion 113 of the application surface of the horn 110, so that the distance between the horn 110 and the anvil 120 can be kept constant during ultrasonic bonding. Therefore, the ultrasonic bonding device 100 can more reliably prevent attenuation of the load transmitted from the horn 110 during ultrasonic bonding. Furthermore, because the load that the anvil 120 receives from the horn 110 is constant, the ultrasonic bonding device 100 can keep the bonding strength between the electric wire 10 and the terminal 20 constant (uniformly fix the conductor portion 11 of the electric wire 10 to the terminal 20), thereby enabling more appropriate ultrasonic bonding of the electric wire 10 and the terminal 20. Therefore, the ultrasonic bonding device 100 and the electric wire with terminal 1 of this embodiment can ensure appropriate electrical conduction performance at the bonding portion between the electric wire 10 and the terminal 20.

[0043] The ultrasonic bonding device 100 and the terminal-attached electric wire 1 according to the above-described embodiment of the present invention are not limited to the above-described embodiment, and various modifications are possible within the scope of the claims.

[0044] For example, the placement surface 121 does not need to be provided with the flat portion 124 at the end of the placement surface.

[0045] Furthermore, the curvature of the curved surface of the application surface end inclined portion 113 of the application surface 111 and the curvature of the curved surface of the placement surface end inclined portion 123 of the placement surface 121 may be different.

[0046] In addition, the terminal 20 may be pre-pressed to form the first straight portion 23, the curved portion 24, and the second straight portion 25, or may be press-formed simultaneously with ultrasonic bonding using the ultrasonic bonding device 100 to form the first straight portion 23, the curved portion 24, and the second straight portion 25.

[0047] Furthermore, the shape of the terminal 20 other than the first straight portion 23, the curved portion 24, and the second straight portion 25 is not particularly limited.

[0048] Furthermore, the terminal 20 does not necessarily have to be provided with the second straight portion 25.

[0049] Furthermore, there is no particular limitation as to whether or not the terminals 20 are surface-treated.

[0050] Furthermore, the ultrasonic bonding device 100 and the terminal-fitted electric wire 1 according to this embodiment may be configured by appropriately combining the components of the embodiments described above. [Explanation of symbols]

[0051] 1 Wire with terminal 10 Electric wire 11 Conductor 20 terminals 22 Wire connection 23 First straight section 24 Curved area 25 Second straight section 100 Ultrasonic bonding equipment 110 Horn 110a Horn end 111 Applied surface 112 application surface main body 113 Slanted part of the end of the application surface 120 Anvil 120a Anvil Edge 121 Placement surface 122 Placing surface main body 123 Inclined end of mounting surface 124 Flat end of mounting surface D1 Horn pressure direction D2 Horn vibration direction X-axis direction Y left / right direction Z vertical direction

Claims

1. an anvil having a mounting surface on which the conductive terminal and the end of the conductor portion of the conductive electric wire are placed; a horn disposed opposite the anvil in the vertical direction, the horn having an application surface that applies ultrasonic vibrations to the terminal disposed on the mounting surface and the conductor portion disposed on the terminal, the application surface includes an application surface main body portion extending along an axial direction intersecting the up-down direction, and an application surface end inclined portion formed by a concave curved surface that is located at an end on a side on which the electric wire extends in the axial direction and moves away from the placement surface along the up-down direction toward the end in the axial direction, the mounting surface is characterized in that it is configured to include a mounting surface main body portion extending along the axial direction and facing the application surface main body portion along the up-down direction, and a mounting surface end inclined portion located at an end on a side on which the electric wire extends in the axial direction and facing the application surface end inclined portion along the up-down direction, and formed by a convex curved surface that approaches the application surface side along the up-down direction toward the end in the axial direction. Ultrasonic bonding equipment.

2. the placing surface further includes a placing surface end flat portion that extends from the placing surface end inclined portion to an end on a side on which the electric wire extends along the axial direction and is located closer to the application surface than the placing surface main body portion in the up-down direction. The ultrasonic bonding device according to claim 1 .

3. the curvature of the curved surface of the inclined end portion of the placement surface is equal to the curvature of the curved surface of the inclined end portion of the application surface; 3. The ultrasonic bonding device according to claim 1 or 2.

4. an electric wire including a conductor portion formed of a plurality of conductive wires; a terminal including an electrical connection portion electrically connected to a connection object and an electric wire connection portion to which the conductor portion is ultrasonically joined; the electric wire connection portion includes a first straight portion extending from the electrical connection portion, and a curved portion extending from the first straight portion to an opposite side of the electrical connection portion and rising from the first straight portion toward the conductor portion. Wire with terminals.

5. the wire connection portion further includes a second straight portion extending from the curved portion to a side opposite to the first straight portion and positioned at a step with respect to the first straight portion. The electric wire with terminal according to claim 4.

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