JP2024041122A - Electric wire with terminal and method for manufacturing electric wire with terminal - Google Patents

Abstract

The present invention provides an electric wire with a terminal capable of ensuring appropriate corrosion prevention performance, and a method for manufacturing the electric wire with a terminal. [Solution] The electric wire with terminal 100 includes an electric wire W having a conductive conductor portion W1 covered with an insulating covering portion W2 having insulation, an electric wire crimping portion 4 crimped to an end W2a of the insulating covering portion W2 and the conductor portion W1 exposed from the end W2a, an electric connection portion 2 electrically connected to a mating terminal, and a crimp terminal 1 including a connecting portion 3 connecting and conducting the electric wire crimping portion 4 and the electric connection portion 2, an anticorrosive material 10 arranged on the exposed conductor portion W1 of the electric wire W and the electric wire crimping portion 4, and a recess 5 provided on the inner surface of the connecting portion 3, the connecting portion 3 including a bottom plate 30 and side plates 31 provided on both sides of the bottom plate 30 in a width direction Y intersecting with the extending direction of the electric wire W, and the recess 5 is formed in a groove shape communicating with the bottom plate 30 and the side plates 31, and at least a part of the recess 5 is provided exposed from the anticorrosive material 10. [Selected Figure] Fig. 4

Description

The present invention relates to an electric wire with a terminal and a method of manufacturing the electric wire with a terminal.

For example, Patent Documents 1 to 3 disclose technologies that are applied to electric wires with terminals in which an electric wire and a terminal are connected.

In the electric wire with a terminal disclosed in Patent Document 1, a vertical groove for resin adhesion is formed on the inner surface of the bottom plate portion of the connecting portion of the crimp terminal. A plurality of vertical grooves are formed in a concave shape so as to extend in parallel in a direction orthogonal to the longitudinal direction of the crimp terminal.

In the electric wire with a terminal disclosed in Patent Document 2, a recess is formed on the surface of the bottom plate in an area on the near side (applied area side) of the prohibited area among non-applied areas other than the applied area of the crimp terminal. The recess accommodates the coating agent that flows out of the coated area and flows into the non-coated area, and is cured.

In the electric wire with a terminal disclosed in Patent Document 3, an uneven portion is formed on at least the surface of the connecting portion of the crimp terminal (terminal metal fitting) on the side where the core wire is arranged. The uneven portion has a form in which grooves and protrusions are arranged alternately in the axial direction. The uneven portion lengthens the path of water ingress to the core wire at the connecting portion, ensuring high waterproofness over a long period of time.

JP2016-091673A Patent No. 5528786 Japanese Patent Application Publication No. 2012-059518

A crimp terminal for an electric wire with a terminal has a wire crimp part that is crimped onto the wire, an electrical connection part that is electrically connected to a mating terminal, and a connecting part that connects and conducts the wire crimp part and the electrical connection part. ,including. The anticorrosive material seals the exposed conductor portion of the wire and the crimp portion of the wire, thereby preventing corrosion of dissimilar metals between the conductor portion of the wire and the crimp terminal, which occurs due to water intrusion or the like.

However, when applying anti-corrosion to the crimp terminal, if the anti-corrosion flows from the wire crimp part to the electrical connection part via the connection part, there is a risk that the resistance of the contact part of the electrical connection part will increase. There is room for improvement.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric wire with a terminal and a method for manufacturing the electric wire with a terminal that can ensure appropriate anticorrosion performance.

In order to achieve the above object, an electric wire with a terminal according to the present invention includes an electric wire in which a conductive part having conductivity is covered with an insulating covering part having insulating properties, a terminal of the insulating covering part, and a terminal exposed from the terminal. A crimp terminal including a wire crimping part that is crimped to the conductor part, an electrical connection part that is electrically connected to a mating terminal, and a connecting part that connects and conducts the wire crimping part and the electrical connection part. , the conductor portion to which the electric wire is exposed, a corrosion-proofing portion disposed in the wire crimping portion, and a recess provided in the connecting portion; side plates provided upright on both sides of the width direction intersecting the extension direction; the recess is formed in the shape of a groove that communicates with the bottom plate and the inner surface of the side plate; It is exposed from the anticorrosive material.

In order to achieve the above object, a method for manufacturing an electric wire with a terminal according to the present invention includes an electric wire in which a conductor part having conductivity is covered with an insulating sheathing part having insulating properties, an end of the insulating sheathing part, and the terminal. an electric wire crimping part that is crimped to the conductor part exposed from the wire, an electrical connection part that is electrically connected to a mating terminal, and a connecting part that connects and conducts the electric wire crimping part and the electrical connection part. The connecting portion includes a crimp terminal, the conductor portion where the electric wire is exposed, a corrosion-proofing portion disposed in the wire crimp portion, and a recess provided in the connecting portion, and the connecting portion includes a bottom plate and the bottom plate. and a side plate provided upright on both sides in a width direction intersecting the extending direction of the electric wire, and the recess is formed in the shape of a groove communicating with the bottom plate and the inner surface of the side plate. A method for manufacturing an electric wire with a terminal, the method comprising: applying an anticorrosive to the exposed conductor portion of the crimp terminal crimped to the electric wire and the wire crimping portion; and applying the anticorrosive to at least a part of the recess. The method includes a step of exposing the food material and a step of hardening the anticorrosive material.

The electric wire with a terminal according to the present invention is applied to a concave portion formed in a connecting portion between an electric wire crimping portion and an electrical connection portion so as to be placed on the exposed conductor portion of the electric wire and the electric wire crimping portion. Store the anticorrosion liquid. Thereby, the terminal-equipped electric wire can suppress the inflow of anticorrosion into the electrical connection portion side. In addition, in the electric wire with a terminal according to the present invention, the hardened corrosion protection enters the recess and fits into the crimp terminal, so the adhesion between the crimp terminal and the conductor increases, allowing water to enter. Corrosion between dissimilar metals can be further prevented. In particular, since at least a portion of the recessed portion of the electric wire with a terminal is exposed from the corrosion-proofing portion, it can be visually confirmed that the corrosion-proofing material is prevented from flowing into the electrical connection portion side. As a result, according to the electric wire with a terminal according to the present invention, appropriate anticorrosion performance can be ensured.

FIG. 1 is an exploded perspective view showing a schematic configuration of an electric wire with a terminal according to an embodiment. FIG. 2 is a perspective view showing a schematic configuration of the electric wire with a terminal according to the embodiment. FIG. 3 is a plan view showing a schematic configuration of the electric wire with a terminal according to the embodiment. FIG. 4 is a plan view showing a schematic configuration of the electric wire with a terminal according to the embodiment. FIG. 5 is a schematic cross-sectional view taken along line AA shown in FIG. FIG. 6 is a developed view showing a schematic configuration of the electric wire with a terminal according to the embodiment. FIG. 7 is a flowchart showing a method for manufacturing a terminal-equipped electric wire according to the embodiment. FIG. 8 is a partially enlarged side sectional view showing a schematic configuration of the electric wire with a terminal according to the embodiment. FIG. 9 is a partially enlarged side sectional view showing a schematic configuration of the electric wire with a terminal according to the embodiment. FIG. 10 is a partially enlarged side plan view showing a schematic configuration of the electric wire with a terminal according to the embodiment. FIG. 11 is a plan view showing a schematic configuration of an electric wire with a terminal according to a reference example. FIG. 12 is a schematic cross-sectional view taken along line BB shown in FIG. FIG. 13 is a partially enlarged perspective view showing a schematic configuration of an electric wire with a terminal according to a reference example. FIG. 14 is a developed view showing a schematic configuration of an electric wire with a terminal according to a reference example. FIG. 15 is a schematic cross-sectional view taken along the line BB shown in FIG. 11, and is another configuration diagram. FIG. 16 is a schematic cross-sectional view taken along the line BB shown in FIG. 11, and is another configuration diagram. FIG. 17 is a flowchart showing a method for manufacturing a terminal-equipped electric wire according to a reference example. FIG. 18 is a partially enlarged side sectional view showing a schematic configuration of an electric wire with a terminal according to a reference example. FIG. 19 is a partially enlarged side sectional view showing a schematic configuration of an electric wire with a terminal according to a reference example. FIG. 20 is a partially enlarged side plan view showing a schematic configuration of an electric wire with a terminal according to a reference example. FIG. 21 is a partially enlarged vertical cross-sectional view showing a schematic configuration of an electric wire with a terminal according to a reference example.

EMBODIMENT OF THE INVENTION Below, embodiment based on this invention is described in detail based on drawing. Note that the present invention is not limited to this embodiment. Further, the components in the embodiments described below include those that can be easily replaced by those skilled in the art, or those that are substantially the same.

In addition, in the following explanation, among the first direction, second direction, and third direction that intersect with each other, the first direction is referred to as "axial direction X", and the second direction is referred to as "width direction Y", The third direction is referred to as the "height direction Z." Here, the axial direction X, the width direction Y, and the height direction Z are substantially orthogonal to each other. Typically, the axial direction Equivalent to. The width direction Y and the height direction Z correspond to a cross direction that intersects the axial direction X. In the following description, the direction along the axis X1 in the state after the crimp terminal is crimped will be referred to as the "circumferential direction D1." Further, each direction used in the following description represents a direction in a state where each part is assembled with each other, unless otherwise specified.

[Embodiment]
FIG. 1 is an exploded perspective view showing a schematic configuration of an electric wire with a terminal. FIG. 2 is a perspective view showing a schematic configuration of an electric wire with a terminal. FIG. 3 is a plan view showing a schematic configuration of the electric wire with a terminal. FIG. 1 shows the state of the crimp terminal before crimping. 2 and 3 show the state of the crimp terminal after crimping.

The electric wire 100 with a terminal according to this embodiment is applied to a wire harness or the like used in a vehicle. Here, the wire harness is, for example, a bundle of a plurality of electric wires W used for power supply and signal communication for connection between various devices mounted on a vehicle as a collective part, and a connector etc. is connected to each device.

The electric wire 100 with a terminal of this embodiment includes an electric wire W, a crimp terminal 1 which is crimped and conductively connected to the end of the electric wire W, and an anticorrosive material 10 (see FIG. 2) that covers each part to prevent corrosion. The crimp terminal 1 of this embodiment constitutes a corrosion-proof terminal that is protected against corrosion by the corrosion-proofing material 10. Hereinafter, each structure of the electric wire 100 with a terminal will be explained in detail with reference to each figure.

The electric wire W is wired in the vehicle and electrically connects each device. As shown in FIG. 1, the electric wire W includes a linear conductor portion W1 having electrical conductivity and an insulating coating portion W2 having insulation properties covering the outside of the conductor portion W1. The electric wire W is an insulated wire in which a conductor portion W1 is covered with an insulating coating portion W2.

The conductor portion W1 is a core wire made by bundling a plurality of conductive metal wires. The conductor portion W1 may be a twisted core wire obtained by twisting the plurality of metal wires together. The insulation coating part W2 is a wire coating that covers the outer peripheral side of the conductor part W1. The insulating coating W2 is made of, for example, an insulating resin material (PP (polypropylene), PVC (polyvinyl chloride), crosslinked PE (polyethylene), etc., which is appropriately selected in consideration of abrasion resistance, chemical resistance, heat resistance, etc.) ) etc. is formed by extrusion molding.

The electric wire W extends linearly along the axis X1, and is formed to have substantially the same diameter in the extending direction (axial direction X). The electric wire W is formed to have a generally circular cross-sectional shape along the circumferential direction D1 as a whole. In the electric wire W, the cross-sectional shape of the conductor portion W1 (cross-sectional shape in the direction intersecting the axial direction X) is approximately circular along the circumferential direction D1, and the cross-sectional shape of the insulating coating portion W2 is approximately circular along the circumferential direction D1. It is ring-shaped. In the electric wire W, the insulating coating W2 is stripped off at least at one end, and the conductor part W1 is exposed from the terminal W2a of the insulating coating W2. The electric wire W is provided with a crimp terminal 1 in the vicinity of the end W2a of the insulating covering part W2 and in an exposed part (intermediate exposed part W1a) exposed from the end W2a of the insulating covering part W2.

The crimp terminal 1 is a terminal fitting to which an electric wire W is electrically connected and a mating terminal having conductivity is connected. The crimp terminal 1 includes an electrical connection part 2, a connecting part 3, and a wire crimp part 4. The electrical connection portion 2, the connection portion 3, and the wire crimping portion 4 are integrally made of a metal member having conductivity. For example, the crimp terminal 1 is manufactured by processing a single sheet metal sheet by various processes such as punching, pressing, and bending to match the shape of each part such as the electrical connection part 2, the connection part 3, and the wire crimping part 4. By molding, each part is integrally formed in three dimensions. In the crimp terminal 1, the electrical connection portion 2, the connection portion 3, and the wire crimping portion 4 are arranged in this order from one side to the other side along the axial direction X and are interconnected.

The electrical connection part 2 is a part that is electrically connected to a mating terminal. The electrical connection portion 2 may have a male terminal shape or a female terminal shape. The electrical connection portion 2 of this embodiment is illustrated as a female terminal shape, and is electrically connected to a mating terminal having a male terminal shape. Note that the electrical connection portion 2 may be configured to be electrically connected not only to a mating terminal but also to various conductive members such as a grounding member. In this case, the electrical connection portion 2 may be in the shape of a so-called round terminal (LA terminal), which is fastened to a ground member or the like, for example.

The connecting portion 3 is a portion that is interposed between the electrical connecting portion 2 and the wire crimping portion 4, and connects and conducts the electrical connecting portion 2 and the wire crimping portion 4. In the crimp terminal 1, the electrical connection portion 2 and the wire crimping portion 4 are electrically connected via the connecting portion 3, and the electrical connection portion 2 and the conductor portion W1 of the wire W are electrically connected via the wire crimping portion 4. connected and conductive.

The connecting portion 3 includes a bottom plate 30 and a pair of side plates 31. The bottom plate 30 and the side plates 31 are connected to the base 40 of the wire crimping section 4 . The bottom plate 30 is arranged along the axial direction X and the width direction Y. The side plates 31 are provided to stand up along the height direction Z on both sides of the bottom plate 30 in the width direction Y.

The electric wire crimping part 4 is a part to which the electric wire W is connected and electrically connects the end of the electric wire W and the crimp terminal 1. The wire crimping portion 4 is provided at the end of the wire W by being crimped and crimped onto the end of the wire W. The wire crimping section 4 includes a base 40 and barrel pieces 41 and 42. The wire crimping portion 4 is crimped and crimped onto the wire W by the base 40 and the barrel pieces 41 and 42. A pair of barrel pieces 41 are provided facing each other in the width direction Y. A pair of barrel pieces 42 are provided facing each other in the width direction Y. In this way, the wire crimping section 4 includes the base 40 and two pairs of barrel pieces 41 and 42.

In the wire crimping section 4, a conductor crimping section 44, an intermediate section 45, and a covering crimping section 46 are constituted by a base 40, two pairs of barrel pieces 41 and 42. In other words, the wire crimping section 4 includes a base 40, a conductor crimping section 44 constituted by two pairs of barrel pieces 41 and 42, an intermediate section 45, and a covering crimping section 46.

The conductor crimping section 44 is configured by a part of the base 40 and a pair of barrel pieces 41. The intermediate portion 45 is formed by a portion of the base portion 40 . The cover crimping portion 46 is constituted by a portion of the base 40 and the pair of barrel pieces 42 . The wire crimping portions 4 are interconnected in the order of the conductor crimping portion 44, the intermediate portion 45, and the covering crimping portion 46 from the connecting portion 3 side toward the opposite side along the axial direction X. The wire crimping section 4 of this embodiment constitutes a so-called separate barrel-type crimping section in which a pair of barrel pieces 41 and a pair of barrel pieces 42 are separated via an intermediate portion 45.

The base portion 40 extends along the axial direction X and serves as a bottom plate of the wire crimping portion 4 formed in a substantially U-shape in a state before the crimp terminal 1 is crimped. The base portion 40 is formed into a plate shape with a thickness direction along the height direction Z. The end portion of the electric wire W is placed on the base portion 40 during the crimping process. The electrical connection portion 2 is connected to the base portion 40 on one side in the axial direction X via the connection portion 3 . The base portion 40 as a whole has both ends thereof in the width direction Y rising along the height direction Z.

The base portion 40 is continuous along the axial direction X over the conductor crimping portion 44, the intermediate portion 45, and the covering crimping portion 46. Specifically, the base 40 includes a first base 40a forming the conductor crimping part 44, a second base 40b forming the intermediate part 45, and a third base 40c forming the cover crimping part 46, which are connected in the axial direction X. It consists of The electrical connection portion 2 of the base portion 40 is connected to one end of the first base portion 40a in the axial direction X via the connection portion 3. Further, in the state before the crimping process, the base part 40 is connected to a carrier (not shown) at the other end of the third base part 40c in the axial direction X, and is cut from the carrier during the crimping process, for example.

Further, the pair of barrel pieces 41 constitute a conductor crimping portion 44 together with a first base portion 40 a that is a part of the base portion 40 . The conductor crimping portion 44 is a portion that is crimped and crimped onto the conductor portion W1 of the electric wire W, thereby being electrically connected to the conductor portion W1. The conductor crimping part 44 is provided on one end side of the wire crimping part 4 in the axial direction X, here, on the connecting part 3 side.

The pair of barrel pieces 41 are plate-shaped portions formed in the conductor crimping portion 44 and extending in a band shape from the first base portion 40a to both sides in the width direction Y, respectively. The pair of barrel pieces 41 are crimped and crimped while wrapping the conductor portion W1 of the electric wire W between them and the first base portion 40a. One barrel piece 41 extends from the first base 40a to one side in the width direction Y. The other barrel piece 41 extends from the first base 40a to the other side in the width direction Y. Before the pair of barrel pieces 41 are crimped and crimped to the conductor portion W1 of the electric wire W, the first base portion 40a is bent, and together with the first base portion 40a, the pair of barrel pieces 41 form a substantially U-shape. It is formed into a shape. Therefore, the pair of barrel pieces 41 serve as side plates on both sides in the width direction Y of the U-shaped wire crimping section 4 before the crimping process.

The pair of barrel pieces 41 are wound around the conductor part W1, crimped, and crimped, and the length from the root to the tip on the first base 40a side is adjusted so that they do not overlap with each other (do not overlap). is set. The conductor crimping part 44 wraps the outside of the conductor part W1 of the electric wire W arranged between the pair of barrel pieces 41 by the first base part 40a and the pair of barrel pieces 41, and is crimped to the conductor part W1. and crimped. The conductor crimping part 44 is crimped and crimped with the first base 40a and the pair of barrel pieces 41 surrounding the conductor part W1, and in a positional relationship such that the tips of the pair of barrel pieces 41 face each other. be done.

Further, the pair of barrel pieces 42 constitute a covering crimping portion 46 together with a third base portion 40c that is a part of the base portion 40. The covering crimping part 46 is a part that is fixed to the insulating covering part W2 of the electric wire W by being crimped and crimped to the insulating covering part W2. The covering crimping part 46 is provided on the other end side of the wire crimping part 4 in the axial direction X, here, on the opposite side to the connecting part 3 side.

The pair of barrel pieces 42 are plate-shaped portions formed in the cover crimping portion 46 and extending in a band shape from the third base portion 40c to both sides in the width direction Y, respectively. The pair of barrel pieces 42 are crimped and crimped while wrapping the insulating coating W2 of the electric wire W between them and the third base 40c. One barrel piece 42 extends from the third base 40c to one side in the width direction Y. The other barrel piece 42 extends from the third base 40c to the other side in the width direction Y. Before the pair of barrel pieces 42 are crimped and crimped to the insulation coating W2 of the electric wire W, the third base 40c is bent and together with the third base 40c approximately U It is shaped like a letter. Therefore, the pair of barrel pieces 42 serve as side plates in the width direction Y of the U-shaped wire crimping section 4 before the crimping process.

The pair of barrel pieces 42 are wrapped around the insulation coating W2, crimped, and crimped, so that the length from the root to the tip on the third base 40c side overlaps with each other. It is set. The cover crimping part 46 wraps the outside of the insulation coating part W2 of the electric wire W arranged between the pair of barrel pieces 42 by the third base part 40c and the pair of barrel pieces 42, and is attached to the insulation coating part W2. It is tightened and crimped. The covering crimping part 46 is crimped and crimped with the third base 40c and the pair of barrel pieces 42 wrapping around the insulating covering part W2, and in a positional relationship such that the tips of the pair of barrel pieces 42 overlap each other. be done.

In the wire crimping part 4, an intermediate part 45 is interposed between the covering crimping part 46 and the conductor crimping part 44 in the axial direction X. The intermediate part 45 is a part that is interposed between the conductor crimping part 44 and the covering crimping part 46 and connects the conductor crimping part 44 and the covering crimping part 46. The intermediate part 45 is constituted by a second base part 40b, the first base part 40a of the conductor crimping part 44 is connected to one end of the second base part 40b in the axial direction The second base portion 40b of the portion 46 is connected. The intermediate portion 45 constitutes an exposed portion where the intermediate exposed portion W1a of the conductor portion W1 is exposed. Furthermore, the connecting portion 3 is interposed between the conductor crimping portion 44 and the electrical connection portion 2. The conductor crimping portion 44 is crimped onto the conductor portion W1 by the pair of barrel pieces 41 as described above. The connecting portion 3 constitutes an exposed portion where the tip W1b of the conductor portion W1 is exposed from the end of the barrel piece 41.

In the electric wire 100 with a terminal configured as described above, the conductor crimping part 44 is crimped to the conductor part W1, and the covering crimping part 46 is crimped to the insulation covering part W2, so that the crimp terminal 1 is attached to the terminal of the electric wire W. It is crimped. In this state, the crimp terminal 1 has a contact portion formed between the conductor crimp portion 44 and the conductor portion W1, and is electrically connected to the conductor portion W1 of the electric wire W via the contact portion. In the electric wire 100 with a terminal, the crimp terminal 1 is held in, for example, a connector housing, and the connector housing is mutually fitted and connected to the connector housing of the mating connector, so that the crimp terminal 1 is electrically connected to the mating terminal. They are connected to form electrical contact points therebetween. As a result, the electric wire 100 with a terminal is electrically connected to the mating terminal via the connection portion.

By the way, in the electric wire with a terminal 100, the conductor portion W1 of the electric wire W to which the crimp terminal 1 is crimped may be made of, for example, aluminum (Al) or an aluminum alloy. That is, in this case, the conductor portion W1 is a core wire made by bundling a plurality of metal wires made of aluminum or aluminum alloy. On the other hand, the crimp terminal 1 is constructed by plating the surface of a base material made of a different metal than the conductor portion W1, such as copper (Cu) or a copper alloy, with tin (Sn) or the like. There may be cases. In this case, in the electric wire 100 with a terminal, the material of the conductor portion W1 is aluminum or aluminum alloy, and the material of the crimp terminal 1 is copper or copper alloy, so that if water (salt water) etc. enters between the two, ionization of the two occurs. Due to the difference in tendency, galvanic corrosion may occur between the conductor portion W1 and the crimp terminal 1. Note that the aluminum alloy is an alloy containing aluminum as a main component. Further, the copper alloy is an alloy containing copper as a main component, and includes, for example, so-called brass.

On the other hand, in the electric wire 100 with a terminal according to the present embodiment, the corrosion-preventing corrosion-preventing material 10 is applied to the electric wire crimping portion 4, thereby suppressing the occurrence of galvanic corrosion as described above. The electric wire 100 with a terminal is protected against corrosion by covering at least the intermediate exposed portion W1a of the conductor portion W1 exposed in the intermediate portion 45 and the tip W1b with the corrosion protection material 10. The anticorrosive material 10 is made of, for example, a UV (Ultraviolet) curable resin that is cured by irradiation with ultraviolet rays. As the UV curable resin, for example, urethane acrylate resin can be used, but it is not limited thereto. The anticorrosive material 10 has a paste-like UV curable resin applied to a predetermined area, and then is cured and retains its shape by being irradiated with ultraviolet rays. Here, the anticorrosive material 10 is provided over the connecting portion 3 , the conductor crimping portion 44 , the intermediate portion 45 , and the covering crimping portion 46 . That is, here, the corrosion protection 10 extends along the axial direction provided. Further, the anticorrosive material 10 is provided so as to penetrate into the inside of the wire crimping section 4 and between the wires of the conductor section W1. The anticorrosive material 10 is applied to and permeated into each of the above parts, and then cured by being irradiated with ultraviolet rays to maintain its shape and cover the respective parts. With this configuration, the crimp terminal 1 can be water-tightened by the anti-corrosion 10, and can prevent water (salt water, etc.) from entering the inside, and can suppress the occurrence of galvanic corrosion and the like. Although the corrosion protection 10 has been described as being made of UV curable resin, it is not limited thereto, and may be made of thermosetting resin that hardens by applying heat, for example.

As shown in FIG. 3, the corrosion protection 10 is placed with the crimp portions of the pair of barrel pieces 41 and the pair of barrel pieces 42 of the crimp terminal 1 facing upward, and as shown in FIG. The droplet is deposited as a bead-shaped liquid 10a, and further, as the nozzle moves relatively in the axial direction X, the droplet is deposited at a plurality of locations. For example, the bead-shaped liquid 10a is distributed at several locations near the tip W1b exposed from the connecting portion 3, at several locations along the axial direction X of the conductor crimping portion 44, and near the intermediate exposed portion W1a exposed from the intermediate portion 45. The droplets are deposited at several locations and at one location on the covering crimping portion 46 . The liquid 10a deposited at various locations penetrates into the inside of the wire crimping part 4 and between the wires of the conductor part W1 in the connecting part 3, the conductor crimping part 44, the intermediate part 45, and the covering crimping part 46. As shown in FIG. 2, it flows in the axial direction X. The fluid 10a that has flowed forms a continuous film that covers the exposed portion of the conductor portion W1 and the entire crimped portion. In this state, the liquid 10a is hardened.

By the way, the liquid 10a may flow into the electrical connection part 2 side at the connection part 3. When the liquid 10a flows into the electrical connection part 2 and hardens, there is a possibility that the resistance of the contact part in the electrical connection part 2 increases. Therefore, the terminal-equipped electric wire 100 of this embodiment is provided with the recess 5.

The details of the electric wire 100 with a terminal according to the embodiment will be explained using FIGS. 1 to 10.

Specifically, in the terminal-equipped electric wire 100 of this embodiment, the connecting portion 3 is provided with the recessed portion 5 . As described above, the connecting portion 3 includes the bottom plate 30 and the side plates 31 that are provided upright along the height direction Z on both sides of the bottom plate 30 in the width direction Y. The recess 5 includes a bottom plate recess 51 provided in the bottom plate 30 and a side plate recess 52 provided in the side plate 31. The bottom plate recess 51 is formed in the shape of a continuous groove along the width direction Y on the inner surface 30a of the bottom plate 30 facing inward where the conductor portion W1 is arranged. The side plate recess 52 is formed in the shape of a groove that is continuous along the height direction Z and communicates with the bottom plate recess 51 at the inner surface 31a of the side plate 31 facing inward where the conductor portion W1 is arranged. The upper end of the side plate recess 52 along the height direction Z does not open to the upper end of the side plate 31 and is closed midway. That is, the recess 5 is provided in the bottom plate 30 and the side plate 31 so that the bottom plate recess 51 and the side plate recess 52 communicate with each other, and is formed in a U-shape when viewed from the axial direction X as shown in FIG. Further, as shown in FIG. 4, the recesses 5 may be configured as sawtooth serrations that are provided at a plurality of intervals in the axial direction X. The recess 5 is formed by pressing after the crimp terminal 1 is punched, as shown in FIG. 6, and then three-dimensionally formed by bending, as shown in FIGS. 4 and 5.

Further, as shown in FIG. 7, in the method for manufacturing the electric wire 100 with a terminal, in step S11, the tip W1b of the exposed conductor portion W1 of the crimp terminal 1 crimped to the electric wire W, the intermediate exposed portion W1a, and the wire crimping The liquid 10a of the anti-corrosion 10 is applied dropwise to the portion 4. Next, in step S12, at least a portion of the recess 5 is exposed from the liquid 10a of the corrosion protection material 10. In this step S12, as shown in FIG. 8 and FIG. Let it accumulate in the section. Further, if the fluid 10a that has flowed forms a continuous film and covers the exposed portion of the conductor portion W1 and the entire crimped portion, as shown in FIG. 10a does not have to reach the recess 5. Next, in step S13, the anticorrosion 10 is hardened. In this way, the terminal-equipped electric wire 100 of the embodiment is manufactured.

The manufactured electric wire 100 with a terminal is provided with an exposed portion 50 in which at least a portion is exposed from the corrosion protection 10 in the recessed portion 5 . For example, as shown in FIG. 9, the exposed portion 50 is mainly provided at the center of the bottom plate recess 51 in the width direction Y. Further, the exposed portion 50 is provided, for example, at the upper end portion of the side plate recess 52 in the height direction Z, as shown in FIG.

As described above, the electric wire 100 with a terminal according to the embodiment includes the electric wire W in which the conductor portion W1 having conductivity is covered with the insulation coating portion W2 having insulation properties, the terminal W2a of the insulation coating portion W2, and the terminal W2a exposed from the terminal W2a. A wire crimping part 4 is crimped to the conductor part W1, an electrical connection part 2 is electrically connected to a mating terminal, and a connecting part 3 is connected and conductive between the wire crimping part 4 and the electrical connection part 2. It includes a crimp terminal 1 , an exposed conductor part W1 of the electric wire W, a corrosion-proofing material 10 disposed in the wire crimping part 4 , and a recess 5 provided in the connecting part 3 . Further, the connecting portion 3 includes a bottom plate 30 and side plates 31 that are provided upright on both sides of the bottom plate 30 in the width direction Y that intersects with the extending direction of the electric wire W. The recess 5 is formed in the shape of a groove communicating with the bottom plate 30 and the inner surfaces 30a, 31a of the side plates 31, and is provided with at least a portion exposed from the corrosion protection 10.

According to this electric wire 100 with a terminal, the exposed conductor portion W1 of the electric wire W and the wire crimping portion 4 are connected to the recess 5 formed in the connecting portion 3 between the electric wire crimping portion 4 and the electrical connection portion 2. The anticorrosion 10 applied is stored so as to be arranged. In particular, the liquid 10a of the corrosion protection 10 tends to flow along the corner of the bottom plate 30 and the side plate 31 of the connecting portion 3, and according to the terminal-equipped electric wire 100, the liquid 10a of the corrosion protection 10 can be stored at the corner. . Thereby, the electric wire 100 with a terminal can suppress the inflow of the liquid 10a of the corrosion protection 10 toward the electrical connection portion 2 side. Moreover, in the electric wire 100 with a terminal, the hardened corrosion protection 10 fits into the crimp terminal 1 when the corrosion protection 10 enters the recess 5, so that the adhesion between the crimp terminal 1 and the conductor portion W1 increases, and water Corrosion between dissimilar metals due to the intrusion of metals can be further prevented. In particular, since the electric wire 100 with a terminal has an exposed portion 50 in which at least a part of the recess 5 is exposed from the corrosion protection 10, it can be visually confirmed that the liquid 10a of the corrosion protection 10 is prevented from flowing into the electrical connection portion 2 side. . As a result, according to the terminal-equipped electric wire 100 of the embodiment, appropriate anticorrosion performance can be ensured.

Moreover, in the electric wire 100 with a terminal of the embodiment, a plurality of recesses 5 are arranged in the extending direction. That is, in this electric wire 100 with a terminal, the plurality of recesses 5 are configured as sawtooth serrations. Therefore, according to the electric wire 100 with a terminal according to the embodiment, the liquid 10a of the anticorrosive material 10 that has flowed in the connection part 3 is collected in the recess 5 in multiple stages, thereby making it possible to further prevent the liquid 10a from flowing into the electrical connection part 2 side. It can be prevented.

The method of manufacturing the electric wire 100 with a terminal according to the present embodiment includes a step of applying anticorrosion 10 to the exposed conductor portion W1 of the crimp terminal 1 crimped to the electric wire W and the wire crimping portion 4, The method includes the steps of exposing at least a portion of the corrosion protection 10 and hardening the corrosion protection 10.

According to this method of manufacturing the electric wire 100 with a terminal, it is possible to suppress the liquid 10a of the corrosion protection 10 from flowing into the electrical connection portion 2 side, and this can be visually recognized. As a result, according to the method for manufacturing the electric wire 100 with a terminal according to the embodiment, it is possible to easily manufacture the electric wire 100 with a terminal that can ensure appropriate anticorrosion performance.

[Reference example]
A reference example electric wire 200 with a terminal will be described using FIGS. 11 to 21.

The electric wire 200 with a terminal of the reference example includes a crimp terminal 11 having a different configuration from the crimp terminal 1 of the electric wire with a terminal 100 of the above-described embodiment in the configuration shown in FIGS. 1 to 3. Specifically, in the electric wire with a terminal 200, the crimp terminal 11 is different in that a convex portion (also referred to as a convex wall) 6 is provided in place of the recessed portion 5 of the crimp terminal 1 of the electric wire with a terminal 100; The configuration is equivalent. Therefore, in the following description of the electric wire 200 with a terminal, parts equivalent to the electric wire 100 with a terminal of the embodiment are given the same reference numerals, and the description thereof will be omitted.

As described above, the connecting portion 3 includes the bottom plate 30 and the side plates 31 that are provided upright along the height direction Z on both sides of the bottom plate 30 in the width direction Y. The convex portion 6 includes a bottom plate convex portion 61 provided on the bottom plate 30 and a side plate convex portion 62 provided on the side plate 31. The bottom plate convex part 61 is formed in the shape of a weir that continues along the width direction Y on the inner surface 30a of the bottom plate 30 facing inward where the conductor part W1 is arranged. The side plate protrusion 62 is formed in a weir shape that is continuous along the height direction Z and communicates with the bottom plate protrusion 61 at the inner surface 31a facing inward where the conductor portion W1 is arranged in the side plate 31. The upper end 62b of the side plate convex portion 62 along the height direction Z does not open to the upper end of the side plate 31 but is stopped midway. That is, the protrusion 6 is provided on the bottom plate 30 and the side plate 31, with the bottom plate protrusion 61 and the side plate protrusion 62 communicating with each other, and is formed into a U-shape when viewed from the axial direction X, as shown in FIG. Ru. Further, the convex portions 6 may be provided in the axial direction X at a plurality of intervals and configured in a sawtooth shape. The convex portion 6 is formed by punching the crimp terminal 11 as shown in FIG. 14, then by pressing as shown in FIG. 12, and then by bending as shown in FIGS. 11 and 13. Formed three-dimensionally.

As shown in FIG. 12, the convex portion 6 has tips 61a and 62a formed in an arcuate cross section. In addition, the protrusions 6 may have tips 61a and 62a formed in a flat cross section as shown in FIG. 15, or tips 61a and 62a formed in a flat cross section as shown in FIG. Good too.

Further, as shown in FIG. 17, in the method for manufacturing the electric wire 200 with a terminal, in step S21, the tip W1b of the exposed conductor portion W1 of the crimp terminal 11 crimped to the electric wire W, the intermediate exposed portion W1a, and the wire crimping The liquid 10a of the anti-corrosion 10 is applied dropwise to the portion 4. Next, in step S22, the liquid 10a of the corrosion protection material 10 is dammed up and pooled by the convex portion 6, and at least a portion of the projection portion 6 is exposed from the liquid 10a of the corrosion protection material 10. In this step S22, as shown in FIG. 18 and FIG. Let it accumulate. Further, if the fluid 10a that has flowed forms a continuous film and covers the exposed portion of the conductor portion W1 and the entire crimped portion, as shown in FIG. 10a does not have to reach the convex portion 6. Next, in step S23, the corrosion protection 10 is hardened. In this way, the electric wire 200 with a terminal of the reference example is manufactured.

The manufactured electric wire 200 with a terminal is provided with an exposed portion 60 at least partially exposed from the corrosion protection 10 in the convex portion 6 . For example, as shown in FIG. 18, the exposed portions 60 are mainly provided at the tips 61a and 62a of the bottom plate protrusion 61 and the side plate protrusion 62, and at the upper end 62b of the side plate protrusion 62.

As described above, the electric wire 200 with a terminal of the reference example includes the electric wire W in which the conductor part W1 having conductivity is covered with the insulating sheathing part W2 having insulating properties, the terminal W2a of the insulating covering part W2, and the terminal W2a exposed from the terminal W2a. A wire crimping part 4 is crimped to the conductor part W1, an electrical connection part 2 is electrically connected to a mating terminal, and a connecting part 3 is connected and conductive between the wire crimping part 4 and the electrical connection part 2. It includes a crimp terminal 11 including a crimp terminal 11, an exposed conductor portion W1 of the electric wire W, a corrosion-proofing material 10 disposed on the wire crimp portion 4, and a convex portion 6 provided on the connecting portion 3.

According to this electric wire 200 with a terminal, the convex portion 6 formed in the connecting portion 3 between the wire crimping portion 4 and the electrical connection portion 2 allows the exposed conductor portion W1 of the electric wire W and the wire crimping portion 4 to be connected to each other. The liquid 10a of the anticorrosion 10 applied so as to be arranged is dammed up and stored. Thereby, the electric wire 200 with a terminal can suppress the inflow of the liquid 10a of the corrosion protection 10 toward the electrical connection portion 2 side. As a result, according to the electric wire 200 with a terminal of the reference example, appropriate anti-corrosion performance can be ensured.

In the electric wire 200 with a terminal of the reference example, the connecting portion 3 includes a bottom plate 30 and side plates 31 that are provided upright on both sides of the bottom plate 30 in the width direction Y that intersects with the extending direction (axial direction X) of the electric wire W. and. The convex portion 6 is formed on the bottom plate 30 and the inner surfaces 30a and 31a of the side plate 31 so as to communicate with both.

The liquid 10a of the corrosion protection 10 tends to flow along the corner of the bottom plate 30 and the side plate 31 of the connecting part 3, and according to this electric wire 200 with a terminal, the liquid 10a of the corrosion protection 10 can be dammed up and stored at the corner. can.

Further, in the electric wire 200 with a terminal according to the reference example, the convex portion 6 is provided so that at least a portion thereof is exposed from the corrosion-proofing material 6.

According to this electric wire 200 with a terminal, since at least a portion of the convex portion 6 is exposed from the corrosion protection 10, it can be visually confirmed that the liquid 10a of the corrosion protection 10 is prevented from flowing into the electrical connection portion 2 side.

Moreover, in the electric wire 200 with a terminal of the reference example, a plurality of convex portions 6 are arranged in the extending direction. That is, in this electric wire 200 with a terminal, the plurality of protrusions 6 are configured in a sawtooth shape. Therefore, according to the electric wire 200 with a terminal of the reference example, the liquid 10a of the anticorrosive material 10 that has flowed in the connection part 3 is accumulated in the convex part 6 in multiple stages, thereby preventing the liquid 10a from flowing into the electrical connection part 2 side. more preventable.

Further, in the electric wire with terminal 200 of the reference example, the convex portion 6 is formed in the plate-shaped connecting portion 3 by press working. Therefore, according to the electric wire 200 with a terminal of the reference example, the convex portion 6 formed by press working is different from the plate thickness T0 between the inner surface 30a of the bottom plate 30 of the connecting portion 3 and the outer surface 30b on the opposite side, and the thickness of the side plate 31. The plate thickness T0 between the inner surface 31a and the opposite outer surface 31b can be maintained approximately. Therefore, according to the electric wire 200 with a terminal of this reference example, the convex portion 6 can be formed while ensuring the strength of the crimp terminal 11.

In addition, in the electric wire 200 with a terminal of the reference example, as shown in FIG. , is one to two times the thickness T0 between the inner surface 30a and the outer surface 30b of the bottom plate 30. Therefore, according to the electric wire 200 with a terminal of the reference example, by setting the dimension T in the height direction Z of the bottom plate convex portion 61 of the convex portion 6 to be equal to or up to twice the thickness T0 of the bottom plate 30, The thickness of the bottom plate 30 when formed by press working can be maintained sufficiently, and the convex portion 6 can be formed while ensuring the strength of the crimp terminal 11.

In addition, in the electric wire 200 with a terminal of the reference example, as shown in FIG. is smaller than the dimension T3 in the height direction Z from the inner surface 30a of the bottom plate 30 at the upper end when the barrel piece 41 is in the crimped state. In the side plate convex portion 62 of the convex portion 6, the position in the height direction Z of the upper end 62b is the height relative to the position of the lower end Pa when the locking member P that is locked to the barrel piece 41 is attached. The dimension T4 in the horizontal direction Z is 0 or more. The locking member P is configured as a spacer that is locked to the barrel piece 41 while the crimp terminal 11 is held in the connector housing. Therefore, according to the electric wire 200 with a terminal of the reference example, the upper end 62b of the side plate protrusion 62 of the protrusion 6 in the height direction Z can be prevented from interfering with the lower end Pa of the locking member P when it is attached.

The method for manufacturing the electric wire 200 with a terminal according to the present embodiment includes the steps of applying the anticorrosive material 10 to the exposed conductor portion W1 of the crimp terminal 11 crimped to the electric wire W and the wire crimping portion 4, and The method includes the steps of: exposing at least a portion of the corrosion protection material 10 from the corrosion protection material 10; and hardening the corrosion protection material 10.

According to this method of manufacturing the electric wire 200 with a terminal, it is possible to suppress the liquid 10a of the corrosion protection 10 from flowing into the electrical connection portion 2 side, and this can be visually recognized. As a result, according to the method for manufacturing the electric wire 200 with a terminal according to the reference example, it is possible to easily manufacture the electric wire 200 with a terminal that can ensure appropriate anticorrosion performance.

Note that the terminal-equipped electric wire 100 according to the embodiment and the terminal-equipped electric wire 200 according to the reference example may be configured by appropriately combining the constituent elements of the embodiment and reference example described above.

1 Crimp terminal 2 Electrical connection part 3 Connecting part 4 Wire crimping part 5 Recess 10 Corrosion protection 30 Bottom plate 30a Inner surface 31 Side plate 31a Inner surface 100 Electric wire with terminal W Electric wire W1 Conductor part W2 Insulating coating part W2a Terminal

Claims (3)

An electric wire in which a conductor part having electrical conductivity is coated with an insulating coating part having insulation properties;
An electric wire crimping part that is crimped to the terminal of the insulating coating part, and the conductor part exposed from the terminal, an electrical connection part that is electrically connected to a mating terminal, and the electric wire crimping part and the electrical connection part. A crimp terminal including a connecting part that connects and conducts with the
the exposed conductor portion of the electric wire; and a corrosion-proofing portion disposed at the wire crimping portion;
a recess provided on the inner surface of the connecting portion;
Equipped with
The connecting portion includes a bottom plate and side plates that are provided upright on both sides of the bottom plate in a width direction that intersects with the extending direction of the electric wire, and the recess is formed on the bottom plate and the inner surface of the side plate. An electric wire with a terminal is formed in a groove shape communicating with both sides, and is provided with at least a portion exposed from the corrosion-proofing material. The electric wire with a terminal according to claim 1, wherein a plurality of the recesses are arranged in the extending direction. An electric wire in which a conductor part having electrical conductivity is coated with an insulating coating part having insulation properties;
An electric wire crimping part that is crimped to the terminal of the insulating coating part, and the conductor part exposed from the terminal, an electrical connection part that is electrically connected to a mating terminal, and the electric wire crimping part and the electrical connection part. A crimp terminal including a connecting part that connects and conducts with the
the exposed conductor portion of the electric wire; and a corrosion-proofing portion disposed at the wire crimping portion;
a recess provided on the inner surface of the connecting portion;
The connecting portion includes a bottom plate, and side plates provided on the bottom plate so as to stand up on both sides of the width direction intersecting the extending direction of the electric wire, and the recessed portion includes the bottom plate and the side plate. A method for manufacturing an electric wire with a terminal formed in a groove shape communicating with both sides on the inner surface of a side plate,
applying an anti-corrosion agent to the exposed conductor portion of the crimp terminal crimped to the electric wire and the wire crimping portion;
exposing at least a portion of the recess from the anticorrosive material;
a step of curing the anticorrosive material;
A method of manufacturing an electric wire with a terminal, including.

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