Crimp terminals and wires with terminals

Abstract

To provide a crimp-style terminal and an electric wire with terminals that can suppress variance in terminal shape while suppressing a front end of a core wire crimp part from being high in terminal height on terminal crimping.SOLUTION: A crimp-style terminal 20 comprises a core wire crimp part 21, an electric connection part 23 and a connection part 24, which has a bottom wall part 24a and side wall parts 24b, 24c. The respective side wall parts have linear parts 24ba, 24ca extending from the core wire crimp part along a length direction X, and wide parts 24bb, 24cb connecting the linear parts and the electric connection parts to each other, and the linear parts extend linearly along side walls 21b, 21c of the core wire crimp part, respectively, and are so formed that the interval between the mutually opposed wide parts gradually increase in a width direction Y from the linear part side toward the electric connection part.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, there is an electric wire with a terminal in which two side walls of a crimp terminal are wrapped around and crimped onto a core of an electric wire. For example, Patent Document 1 discloses a technology for manufacturing an electric wire with a terminal by using a terminal crimping device that includes an upper die that is moved toward a lower die to sandwich a part of the crimping part (core crimping part) between a lower die surface and an upper die surface and crimp a part of the crimping part onto an exposed core part, and a terminal pressing member that is moved toward the lower die and has a flat surface that presses from above an end part of the crimping part that protrudes from the upper die surface. According to Patent Document 1, it is possible to make the protruding width of the protruding part formed on the terminal as small as possible when the terminal is crimped onto the exposed core part at the end of the electric wire. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5720527 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when pressing down the end portion of the crimping portion from above with a terminal pressing member having a flat surface as in Patent Document 1, the shape of the end portion of the crimping portion may vary. Also, when the upper die is extended to the end portion of the crimping portion and the end portion of the crimping portion is pressed down by the upper die surface of the upper die, the side wall of the upper die may interfere with the connecting portion that connects the crimping portion to the electrical connection portion connected to the counterpart member, which may cause variation in the shape of the terminal after crimping.

[0005] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a crimp terminal and an electric wire with a terminal that can suppress variation in terminal shape while preventing the terminal height from increasing at the front end of the core wire crimping portion when the terminal is crimped. [Means for solving the problem]

[0006] The crimp terminal of the present invention comprises a core wire crimping portion that is crimped to a core wire exposed from an end of a coating portion of an electric wire, an electrical connection portion that can be connected to a mating member, and a connecting portion provided between the core wire crimping portion and the electrical connection portion, wherein the connecting portion has a bottom wall portion and side wall portions erected at both ends of the bottom wall portion in a width direction perpendicular to a longitudinal direction from the core wire crimping portion to the electrical connection portion, and each of the side wall portions has a straight portion extending from the core wire crimping portion along the longitudinal direction and a wide portion connecting the straight portion and the electrical connection portion, the core wire crimping portion includes a bottom wall and side walls erected at both ends of the bottom wall in the width direction, and each of the straight portions extends linearly along the side walls of the core wire crimping portion, and the spacing between the opposing wide portions in the width direction is formed so as to gradually increase from the straight portion side toward the electrical connection portion side.

[0007] The electric wire with terminal of the present invention comprises an electric wire in which a conductive core wire is covered with an insulating covering portion, a core wire crimping portion that is crimped while wrapping the entire circumference of the core wire exposed from an end of the covering portion, an electrical connection portion that is provided on the opposite side of the core wire crimping portion from the covering portion side and is connected to a mating member, and a crimp terminal including a connecting portion provided between the core wire crimping portion and the electrical connection portion, wherein a terminal height of a first end portion of the core wire crimping portion on the connecting portion side is lower than a terminal height of a second end portion of the core wire crimping portion on the covering portion side, and the connecting portion is The crimp terminal has a bottom wall portion and side wall portions erected on both ends of the bottom wall portion in the width direction of the crimp terminal, each of the side wall portions having a straight portion extending from the core wire crimping portion in the length direction of the crimp terminal and a wide portion connecting the straight portion and the electrical connection portion, each of the straight portions extending linearly along the side walls of the core wire crimping portion, and the spacing between the opposing wide portions in the width direction of the crimp terminal is formed so as to gradually increase from the straight portion side toward the electrical connection portion side. Effect of the Invention

[0008] The crimp terminal and the electric wire with terminal according to the present invention have the advantage that the terminal height at the front end of the core wire crimping portion during crimping can be prevented from increasing, and also the variation in the terminal shape can be suppressed. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a top view showing an electric wire with a terminal according to an embodiment. [Diagram 2] FIG. 2 is a side view showing the electric wire with terminal according to the embodiment. [Diagram 3] FIG. 3 is a top view showing the crimp terminal according to the embodiment. [Figure 4] FIG. 4 is a side view showing the crimp terminal according to the embodiment. [Diagram 5] FIG. 5 is a front view showing crimping of a crimp terminal by the terminal crimping device of the embodiment. [Figure 6]FIG. 6 is a side view showing crimping of a crimp terminal by the terminal crimping device of the embodiment. [Figure 7] FIG. 7 is a top view showing the relationship between the crimp terminal and the upper die according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a crimp terminal and an electric wire with a terminal according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiment. In addition, the components in the following embodiment include those that a person skilled in the art can easily imagine or that are substantially the same.

[0011] [Embodiment] An embodiment will be described with reference to Fig. 1 to Fig. 7. The embodiment relates to an electric wire with a terminal. Fig. 1 is a top view showing an electric wire with a terminal according to an embodiment. figure, FIG. 2 is a side view showing an electric wire with a terminal according to an embodiment, FIG. 3 is a top view showing a crimp terminal according to an embodiment, FIG. 4 is a side view showing a crimp terminal according to an embodiment, FIG. 5 is a front view showing crimping of a crimp terminal by a terminal crimping device of an embodiment, FIG. 6 is a side view showing crimping of a crimp terminal by a terminal crimping device of an embodiment, and FIG. 7 is a top view showing the relationship between a crimp terminal according to an embodiment and an upper die.

[0012] In the following description, of the first, second, and third directions that intersect with each other, the first direction is referred to as the "length direction X", the second direction is referred to as the "width direction Y", and the third direction is referred to as the "height direction Z". Here, the length direction X, the width direction Y, and the height direction Z are approximately perpendicular to each other. In the embodiment, the length direction X typically corresponds to the length direction of the crimp terminal crimped to the electric wire, the extension direction of the electric wire, and the insertion / removal direction of the crimp terminal and the mating terminal. The width direction Y and the height direction Z correspond to intersecting directions that intersect with the length direction X. The height direction Z typically corresponds to the plate thickness direction of the bottom of the crimp terminal and the height direction of the crimped terminal.

[0013] As shown in Fig. 1, an electric wire with terminal 1 according to the embodiment is applied to a wire harness or the like used in a vehicle. Here, the wire harness is, for example, for connecting various devices mounted on a vehicle, and is an assembly component formed by bundling a plurality of electric wires 10 used for power supply and signal communication. The wire harness is configured to connect the plurality of electric wires 10 to the various devices using connectors or the like.

[0014] The electric wire with terminal 1 according to the embodiment includes an electric wire 10 and a crimp terminal 20. The electric wire 10 includes a core wire 10a, which is a linear conductor having electrical conductivity, and a covering portion 10b having electrical insulation that covers the core wire 10a. The core wire 10a is a bundle of metallic wires having electrical conductivity. The covering portion 10b is an electric wire covering that covers the outer periphery of the core wire 10a. The covering portion 10b is formed by extrusion molding, for example, an insulating resin material (such as PP, PVC, or cross-linked PE, which is appropriately selected in consideration of abrasion resistance, chemical resistance, heat resistance, etc.). At the end portion of the electric wire 10, the covering portion 10b is stripped off, and a part of the core wire 10a is exposed.

[0015] The crimp terminal 20 is a terminal fitting to which the electric wire 10 is electrically connected and which is connected to a conductive counterpart member. The counterpart member is, for example, a counterpart terminal provided on a connection target. The crimp terminal 20 includes a core wire crimping portion 21, a coating crimping portion 22, an electrical connection portion 23, a connecting portion 24, and an intermediate portion 25. The core wire crimping portion 21, the coating crimping portion 22, the electrical connection portion 23, the connecting portion 24, and the intermediate portion 25 are integrally formed as a whole from a conductive metal material. The crimp terminal 20 is connected to each other in the order of the electrical connection portion 23, the connecting portion 24, the core wire crimping portion 21, the intermediate portion 25, and the coating crimping portion 22, from one side to the other along the length direction X.

[0016] The core wire crimping portion 21 is a portion that is crimped to the core wire 10a exposed at the end portion of the electric wire 10. As shown in Figs. 1 and 2, the core wire crimping portion 21 includes a bottom wall 21a, a first barrel piece 21b, and a second barrel piece 21c. The bottom wall 21a is the bottom wall of the core wire crimping portion 21, and is supported by a first die 101 of a terminal crimping device 100, which will be described later. As shown in Figs. 3 and 4, in the crimp terminal 20 before crimping, the first barrel piece 21b is formed as a side wall that protrudes from one end of the bottom wall 21a in the width direction Y. Moreover, the second barrel piece 21c is formed as a side wall that protrudes from the other end of the bottom wall 21a in the width direction Y. In the crimp terminal 20 before crimping, the first barrel piece 21b and Second The barrel pieces 21c are arranged with their inner wall surfaces facing each other. That is, before crimping, the core wire crimping portion 21 is Bottom wall The barrel 21 includes side walls (first barrel piece 21b and second barrel piece 21c) erected on both ends of the bottom wall 21a in the width direction Y, and is formed into a U-shape.

[0017] The first barrel piece 21b and the second barrel piece 21c are wound around the core wire 10a arranged in the space surrounded by the bottom wall 21a, the first barrel piece 21b, and the second barrel piece 21c, and are crimped to form a B-shape in cross section in the length direction X. That is, the core wire crimping portion 21 after crimping is crimped by a so-called B crimp. After crimping, the first barrel piece 21b and the second barrel piece 21c are bent into a curved shape with their free ends facing the inner wall surface of the bottom wall 21a and their outer wall surfaces on the free end side butting against each other. In the crimp terminal 20 after crimping, the first barrel piece 21b and the second barrel piece 21c form the side wall and the upper wall of the core wire crimping portion 21. The free ends of the first barrel piece 21b and the second barrel piece 21c are bitten into the core wire 10a.

[0018] As shown in FIG. 2, in the crimp terminal 20 after crimping, the terminal height of the first end 21d (front end) on the connecting portion 24 side of the core wire crimping portion 21 is lower than the terminal height of the second end BM (rear end) on the covering portion 10b side of the core wire crimping portion 21. In the embodiment, a so-called bell mouth is formed at the second end BM on the covering portion 10b side of the core wire crimping portion 21. The bell mouth is a portion that is generated when the core wire crimping portion 21 of the crimp terminal 20 is crimped, because the ends of the first barrel piece 21b and the second barrel piece 21c are not pressurized compared to the central portions of the first barrel piece 21b and the second barrel piece 21c in the length direction X. In other words, the bell mouth of the second end BM is a portion of the first barrel piece 21b and the second barrel piece 21c that are crimped to the core wire 10a, which protrudes toward the opposite side to the core wire 10a side. The second end BM is formed as a portion that gradually widens away from the core wire 10a as it moves from the center of the core wire crimping portion 21 in the longitudinal direction X to the end on the coating crimping portion 22 side. That is, the second end BM widens obliquely outward so as to escape from the outer periphery of the core wire 10a as it moves from the center of the core wire crimping portion 21 in the longitudinal direction X to the end on the coating crimping portion 22 side.

[0019] Here, the bell mouth of the second end BM is formed to prevent core wire 10a from being damaged by the corner edges (edges) on the inner end sides of first barrel piece 21b and second barrel piece 21c when core wire 10a is wrapped and crimped between bottom wall 21a and first barrel piece 21b and second barrel piece 21c.

[0020] On the other hand, in the embodiment, the first end 21d does not have a bell mouth, and the first end 21d is formed to have a substantially constant height along the longitudinal direction X from the center side of the core wire crimping portion 21 in the longitudinal direction X toward the electrical connection portion 23. Note that the first end 21d may have a bell mouth. In this case, the height of the bell mouth of the first end 21d in the height direction Z is formed to be lower than the height of the second end BM in the height direction Z.

[0021] For example, the bell mouth at the first end of the core wire crimping portion may interfere with a terminal locking lance or the like provided on the connector of the counterpart member, preventing the terminals from completely fitting together. In the embodiment, by not forming a bell mouth at the first end 21d (or by forming the bell mouth small), it is possible to prevent interference between the crimp terminal 20 and the counterpart member from preventing the terminals from completely fitting together.

[0022] The coating crimping portion 22 is a portion that is crimped to the coating portion 10b of the electric wire 10. As shown in Figs. 1 and 2, the coating crimping portion 22 includes a bottom wall portion 22a, a third barrel piece 22b, and a fourth barrel piece 22c, similar to the core wire crimping portion 21. The coating crimping portion 22 is formed in a U-shape with the bottom wall 21a as the bottom wall. The third barrel piece 22b and the fourth barrel piece 22c are respectively wrapped around the coating portion 10b disposed in the space surrounded by the bottom wall portion 22a, the third barrel piece 22b, and the fourth barrel piece 22c, and crimped by crimping, so that the cross section in the length direction is formed into an elliptical shape. In other words, the core wire crimping portion 21 after crimping is crimped by crimping, which is called overlap crimping, to the coating portion 10b.

[0023] The coating crimping portion 22 is connected to the core wire crimping portion 21 by the intermediate portion 25. The crimp terminal 20 is formed as a so-called separate barrel type crimp terminal in which the first and second barrel pieces 21b, 21c and the third and fourth barrel pieces 22b, 22c are separated via the intermediate portion 25. That is, the intermediate portion 25 has a U-shaped cross section in the longitudinal direction, and connects the bottom wall and part of the side wall of the core wire crimping portion 21 to the bottom wall and part of the side wall of the coating crimping portion 22.

[0024] The electrical connection portion 23 is a portion that is connected to a counterpart member. The electrical connection portion 23 may be shaped as a male terminal or as a female terminal. The electrical connection portion 23 in the embodiment is illustrated as being shaped as a male terminal, and is electrically connected to a counterpart terminal that is shaped as a female terminal and is provided on the counterpart member. The electrical connection portion 23 is not limited to being shaped as a counterpart terminal, and may be configured to be electrically connected to various conductive members such as an earth member. In this case, the electrical connection portion 23 may be shaped as a so-called round terminal (LA terminal) that is fastened to, for example, an earth member.

[0025] The connecting portion 24 is a portion of the crimp terminal 20 that connects the electrical connection portion 23 and the core wire crimping portion 21. The connecting portion 24 has a bottom wall portion 24a and side wall portions 24b, 24c erected on both ends of the bottom wall portion 24a in the width direction Y of the crimp terminal 20. The side wall portions 24b, 24c face each other in the width direction Y of the crimp terminal 20. The width of the electrical connection portion 23 in the width direction Y is larger than the width of the core wire crimping portion 21 in the width direction Y, and the side wall portions 24b, 24c of the connecting portion 24 connect the side wall of the core wire crimping portion 21 to the side wall of the electrical connection portion 23, respectively.

[0026] Specifically, the side wall portion 24b of the connecting portion 24 has a straight portion 24ba extending from the core wire crimping portion 21 toward the length direction X of the crimp terminal 20, and a wide portion 24bb connecting the straight portion 24ba and one side wall of the electrical connection portion 23. The side wall portion 24c of the connecting portion 24 has a straight portion 24ca extending from the core wire crimping portion 21 toward the length direction X of the crimp terminal 20, and a wide portion 24cb connecting the straight portion 24ca and the other side wall of the electrical connection portion 23. The straight portions 24ba and 24ca each extend linearly along the side wall of the core wire crimping portion 21. In the width direction Y of the crimp terminal 20, the interval between the mutually opposing wide portions 24bb and 24cb is formed to gradually increase from the straight portion 24ba and 24ca side toward the electrical connection portion 23 side.

[0027] That is, the connecting portion 24 is X A first portion ST extends with a constant width along the length direction XThe first portion ST and the second portion Wd are configured to have a width that increases from the core wire crimping portion 21 side toward the electrical connection portion 23 side along the length direction. X The cross section at the connecting portion 24 is formed in a U-shape. In the connecting portion 24, the first portion ST extends from the core wire crimping portion 21, and the second portion Wd connects the first portion ST and the electrical connection portion 23. The straight portions 24ba, 24ca together with the bottom wall portion 24a form the first portion ST, and the wide portions 24bb, 24cb together with the bottom wall portion 24a form the second portion Wd. As shown in Figs. 1 to 4, the connecting portion 24 maintains the above-mentioned shape before and after crimping.

[0028] As shown in Figs. 5 and 6, the crimp terminal 20 is crimped to the electric wire 10 by the terminal crimping device 100. As shown in Fig. 6, the terminal crimping device 100 includes a first die 101, a second die 102, and a third die 103. The first die 101 is a lower die that supports the core wire crimping portion 21, the intermediate portion 25, and the coating crimping portion 22 from below. The first die 101 has a support surface that supports the crimp terminal 20. The support surface supports the core wire crimping portion 21, the intermediate portion 25, and the bottom wall portion 22a of the coating crimping portion 22. When the crimp terminal 20 is supported by the first die 101, the first barrel piece 21b and the second barrel piece 21c of the core wire crimping portion 21 are in a position extending obliquely upward from the bottom wall 21a. Furthermore, in a state in which the crimp terminal 20 is supported by the first die 101, the third barrel piece 22b and the fourth barrel piece 22c of the coating crimping portion 22 are in a position extending obliquely upward from the bottom wall portion 22a.

[0029] The second die 102 is an upper die that sandwiches the core wire crimping portion 21 and the core wire 10a between itself and the first die 101 to crimp the core wire crimping portion 21 to the core wire 10a. The second die 102 is disposed above the first die 101. The second die 102 moves relative to the first die 101 in the up-down direction.

[0030] 5, the second die 102 has a core wire crimping surface 122 that faces the core wire crimping portion 21 in the height direction Z. When viewed from the tip side of the core wire 10a, the core wire crimping surfaces 122 are adjacent to each other in the width direction Y, and support The first curved surface 122a and the second curved surface 122b are curved in a concave shape toward the opposite side to the front side. support The first curved surface 122a and the second curved surface 122b are formed in a ridge shape protruding toward the surface. The first curved surface 122a and the second curved surface 122b are formed substantially symmetrically with respect to the width direction Y. The cross-sectional shape of the first curved surface 122a and the second curved surface 122b is, for example, an arc shape or a substantially arc shape.

[0031] In the second mold 102, a first wall surface 122d is provided on the side opposite to the second curved surface 122b side of the first curved surface 122a in the width direction Y. The first wall surface 122d extends along the height direction Z from an end of the first curved surface 122a opposite to the second curved surface 122b side. A second wall surface 122e is provided on the side opposite to the first curved surface 122a side of the second curved surface 122b in the width direction Y. The second wall surface 122e extends along the height direction Z from an end of the second curved surface 122b opposite to the first curved surface 122a side. The first wall surface 122d and the second wall surface 122e face each other in the width direction Y. The first wall surface 122d and the second wall surface 122e are formed substantially symmetrically with respect to the width direction Y. In the height direction Z, the first wall surface 122d is disposed above the first barrel piece 21b, and the second wall surface 122e is disposed above the second barrel piece 21c.

[0032] As shown in FIG. 6, the third mold 103 is provided as an upper mold separate from the second mold 102. The third mold 103 is support The third mold 103 has a covering and bonding surface that is curved concavely toward the opposite side from the front side. The third mold 103 has side walls extending along the height direction at both ends of the covering and bonding surface in the width direction Y. The third mold 103 moves relative to the first mold 101 in the up-down direction (height direction Z).

[0033] The terminal crimping device 100 has a driving device 110 that moves the second die 102 and the third die 103 up and down. In the embodiment, with the crimp terminal 20 and the electric wire 10 supported by the first die 101, the driving device 110 lowers the second die 102 and the third die 103 toward the first die 101. The core wire 10a of the electric wire 10 is placed in a space surrounded by the bottom wall 21a, the first barrel piece 21b and the second barrel piece 21c of the core wire crimping portion 21, and is pressed against the bottom wall 21a. Wall 2 1a. When the second mold 102 descends toward the first mold 101, the core wire crimping surface 122 comes into contact with the first barrel piece 21b and the second barrel piece 21c. Specifically, the first barrel piece 21b comes into contact with the first wall surface 122d, and the second barrel piece 21c comes into contact with the second wall surface 122e. The first wall surface 122d presses the first barrel piece 21b toward the second wall surface 122e, changing the inclination of the first barrel piece 21b toward the second wall surface 122e. The second wall surface 122e presses the second barrel piece 21c toward the first wall surface 122d, changing the inclination of the second barrel piece 21c toward the first wall surface 122d.

[0034] As the second die 102 moves further down, the first barrel piece 21b comes into contact with the first curved surface 122a, and the tip of the second barrel piece 21c comes into contact with the second curved surface 122b. The first curved surface 122a folds back the tip of the first barrel piece 21b toward the core wire 10a, and the second curved surface 122b folds back the tip of the second barrel piece 21c toward the core wire 10a. Then, the core wire crimping portion 21 is crimped to the core wire 10a by crimping, which is called a B crimp.

[0035] Furthermore, the terminal crimping device 100 sandwiches the coating crimping portion 22 and the coating portion 10b of the electric wire 10 between the coating crimping surface and the support surface of the third die 103, and crimps the coating crimping portion 22 against the coating portion 10b. Specifically, the coating crimping surface of the third die 103 contacts the third barrel piece 22b and the fourth barrel piece 22c of the coating crimping portion 22, brings the third barrel piece 22b and the fourth barrel piece 22c closer to each other, and bends one barrel piece to overlap the other barrel piece, thereby crimping the coating crimping portion 22 against the coating portion 10b. In this manner, the terminal crimping device 100 crimps the coating crimping portion 22 against the coating portion 10b.

[0036] The second die 102 extends from the third die 103 side toward the electrical connection portion 23 side so as not to form a bell mouth at the first end 21d of the core wire crimping portion 21 (or to make the bell mouth formed at the first end 21d smaller). With this configuration, the core wire crimping surface 122 of the second die 102 presses the first end 21d of the core wire crimping portion 21, so that a bell mouth is not formed at the first end 21d (or the bell mouth formed at the first end 21d is smaller than the bell mouth formed at the second end BM).

[0037] 7 represents the position of the side wall (a part of the second mold constituting the first wall surface 122d and the second wall surface 122e) of the second mold 102. Moreover, the region RB shown in Fig. 7 represents the position of the side wall of the third mold 103. As described above, in the embodiment, the second mold 102 extends from the third mold 103 side toward the electrical connection portion 23 side.

[0038] In the crimp terminal 20 of the embodiment, the position corresponding to the region RA (the first wall surface 122d and the second wall surface 122 e Between the first part ST (lengthwise XThe first portion ST has a width in the width direction Y (a portion extending at a constant width along the width direction Y) and the core wire crimping portion 21. The width of the first portion ST in the width direction Y is set to be substantially equal to the width of the core wire crimping portion 21 in the width direction Y after crimping by swaging. Therefore, the first portion ST and the region RA do not overlap when viewed from the height direction Z, and interference between the connecting portion 24 and the second die 102 is suppressed. In the embodiment, the length of the first portion ST in the length direction X is set to a length that can suppress interference with the second die 102.

[0039] As described above, the crimp terminal 20 according to the embodiment includes the core wire crimping portion 21 that is crimped to the core wire 10a exposed from the end of the covering portion 10b of the electric wire 10, the electrical connection portion 23 that can be connected to a mating member, and the coupling portion 24 provided between the core wire crimping portion 21 and the electrical connection portion 23. The coupling portion 24 has a bottom wall portion 24a and side wall portions 24b, 24c that are erected on both ends of the bottom wall portion 24a in a width direction Y that is perpendicular to a length direction X from the core wire crimping portion 21 toward the electrical connection portion 23. Each of the side wall portions 24b, 24c extends from the core wire crimping portion 21 along the length direction X. The core wire crimping portion 21 has straight portions 24ba, 24ca which connect the straight portions 24ba, 24ca to the electrical connection portion 23, and wide portions 24bb, 24cb which connect the straight portions 24ba, 24ca to the electrical connection portion 23, and the core wire crimping portion 21 includes a bottom wall 21a and side walls 21b, 21c which are erected on both ends of the bottom wall 21a in the width direction Y, and the straight portions 24ba, 24ca each extend linearly along the side walls 21b, 21c of the core wire crimping portion 21, and the distance between the opposing wide portions 24bb, 24cb in the width direction Y is formed so as to gradually become wider from the straight portions 24ba, 24ca side toward the electrical connection portion 23 side.

[0040] The crimp terminal 20 according to the embodiment is provided with straight portions 24ba and 24ca. With this configuration, the crimp terminal 20 according to the embodiment can press the first end 21d of the core wire crimping portion 21 by the second die 102 while suppressing the interference of the second die 102 with the connecting portion 24 when crimping the electric wire 10. Therefore, the crimp terminal 20 according to the embodiment has an effect of suppressing the increase in the terminal height of the first end 21d (front end) of the core wire crimping portion 21 when crimping the electric wire 10. Moreover, the crimp terminal 20 according to the embodiment can suppress the variation in the shape of the connecting portion 24 by suppressing the interference of the second die 102 with the connecting portion 24. Moreover, the crimp terminal 20 according to the embodiment can suppress the decrease in the strength of the connecting portion 24 by suppressing the interference of the second die 102 with the connecting portion 24.

[0041] The electric wire with terminal 1 according to the present embodiment includes an electric wire 10 in which a conductive core wire 10a is covered with an insulating covering portion 10b, a core wire crimping portion 21 that is crimped to cover the entire circumference of the core wire 10a exposed from an end of the covering portion 10b, and the covering portion 10 ba crimp terminal including an electrical connection portion provided on the opposite side to the core wire crimping portion and connected to a mating member, and a connecting portion provided between the core wire crimping portion and the electrical connection portion, a terminal height of a first end portion on the connecting portion side of the core wire crimping portion is lower than a terminal height of a second end portion on the coating portion side of the core wire crimping portion, the connecting portion has a bottom wall portion and side wall portions upright provided at both ends of the bottom wall portion in the width direction of the crimp terminal, Each has a straight portion 24ba, 24ca extending from the core wire crimping portion 21 toward the longitudinal direction X of the crimp terminal 20, and a wide portion 24bb, 24cb connecting the straight portion 24ba, 24ca and the electrical connection portion 23. The straight portions 24ba, 24ca each extend linearly along the side wall of the core wire crimping portion 21, and in the width direction Y of the crimp terminal 20, the distance between the opposing wide portions 24bb, 24cb is formed so as to gradually increase from the straight portions 24ba, 24ca side toward the electrical connection portion 23 side.

[0042] In the electric wire with terminal 1 according to the embodiment, the crimp terminal 20 is provided with the straight portions 24ba and 24ca. With this configuration, the electric wire with terminal 1 according to the embodiment can press the first end 21d of the core wire crimping portion 21 by the second die 102 while suppressing the interference of the second die 102 of the terminal crimping device 100 with the connecting portion 24 during crimping. Therefore, the electric wire with terminal 1 according to the embodiment has an effect of suppressing the terminal height of the first end 21d (front end) of the core wire crimping portion 21 from increasing when the crimp terminal 20 is crimped by crimping, while suppressing the variation in the terminal shape. Moreover, the electric wire with terminal 1 according to the embodiment can suppress the variation in the terminal shape at the connecting portion 24 by suppressing the interference of the second die 102 with the connecting portion 24. Moreover, the electric wire with terminal 1 according to the embodiment can suppress the decrease in the strength of the connecting portion 24 by suppressing the interference of the second die 102 with the connecting portion 24.

[0043] [Reference example] It is conceivable that the connecting portion 24 does not have the straight portions 24ba and 24ca, and has the bottom wall portion 24a and the wide portions 24bb and 24cb (i.e., the connecting portion 24 has only the second portion Wd). In this case, the portion of the second die 102 that is extended to press the first end portion 21d may interfere with the connecting portion 24, which may cause variation in the shape of the terminal after crimping.

[0044] In the above embodiment, the coating crimping portion 22 is crimped to the coating portion 10b by a so-called overlap crimp, but the present invention is not limited to this. For example, the coating crimping portion 22 may be crimped to the coating portion 10b by a so-called B crimp.

[0045] The contents disclosed in the above embodiments can be implemented in appropriate combinations. [Explanation of symbols]

[0046] 10: electric wire, 10a: core wire, 10b: coating 20: crimp terminal, 21: core wire crimping portion, 22: coating crimping portion, 23: electrical connection portion 24: Connecting part, 24a: Bottom wall part, 24b, 24c: Side wall part 24ba, 24ca: Straight section, 24bb, 24cb: Wide section, 25: Middle section 100: terminal crimping device, 101: first mold, 102: second mold, 103: third mold

Claims

1. a core wire crimping portion that is crimped to a core wire exposed from an end of a coating portion of an electric wire; An electrical connection portion connectable to a mating member; a connecting portion provided between the core wire crimping portion and the electrical connection portion; Equipped with the connecting portion has a bottom wall portion and side wall portions provided upright on both ends of the bottom wall portion in a width direction perpendicular to a length direction from the core wire crimping portion toward the electrical connection portion, each of the side wall portions has a straight portion extending linearly from the core wire crimping portion along the length direction when viewed in a height direction perpendicular to the length direction and the width direction, and a wide portion connecting the straight portion and the electrical connection portion, before and after the core wire crimping portion is crimped to the core wire; the core wire crimping portion includes a bottom wall and side walls extending upright from both ends of the bottom wall in the width direction, the straight portions each extend straight along a side wall of the core wire crimping portion, In the side wall portion, an end of the wide portion on the straight portion side is bent toward the outside in the width direction with respect to the straight portion, and a distance between the mutually opposing wide portions in the width direction is gradually increased from the straight portion side toward the electrical connection portion side. A crimp terminal characterized by:

2. an electric wire in which a conductive core wire is covered with an insulating covering portion; a crimp terminal including a core wire crimping portion that is crimped while wrapping the entire circumference of the core wire exposed from an end of the coating portion, an electrical connection portion that is provided on the opposite side of the core wire crimping portion from the coating portion side and that is connected to a mating member, and a coupling portion that is provided between the core wire crimping portion and the electrical connection portion; Equipped with a terminal height of a first end portion of the core wire crimping portion on the coupling portion side is lower than a terminal height of a second end portion of the core wire crimping portion on the coating portion side, The connecting portion has a bottom wall portion and side wall portions provided upright on both ends of the bottom wall portion in a width direction of the crimp terminal, each of the side wall portions has a straight portion extending linearly from the core wire crimping portion in a longitudinal direction of the crimp terminal as viewed in a height direction of the crimp terminal before and after the core wire crimping portion is crimped to the core wire, and a wide portion connecting the straight portion and the electrical connection portion; the straight portions each extend straight along a side wall of the core wire crimping portion, In the side wall portion, an end of the wide portion on the straight portion side is bent toward the outside in the width direction with respect to the straight portion, and a distance between the opposing wide portions in the width direction of the crimp terminal is gradually increased from the straight portion side toward the electrical connection portion side. A terminal-attached electric wire.

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