JP2013161702A - Electric wire with connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of successfully installing an electric wire with a terminal into a cavity of a connector even when an insulation electric wire is big.SOLUTION: An electric wire 2 with a terminal of an electric wire 1 with a connector includes an insulation electric wire 21, and a crimp terminal 23 crimped to an end part of the insulation electric wire 21. An end part of the electric wire 2 with a terminal is inserted into a cavity 331 formed inside the connector 3. The crimp terminal 23 of the electric wire 2 with a terminal has: a coating barrel part 233 crimped to a part of an insulation coating 213 of the insulation electric wire 21 and located outside the connector 3; and a core wire barrel part 231 crimped to a core wire 211 extended from an end of the insulation coating 213 in the insulation electric wire 21 and located inside the cavity 311 of the connector 3. In addition, an anticorrosive agent 4 is coated in a region of the electric wire 2 with a terminal, that includes a part from where the coating barrel part 233 is crimped to where the core wire barrel part 231 is crimped, of the crimp terminal 23.

Description

  The present invention relates to an electric wire with a connector, and more particularly to a technique for mounting an electric wire with a terminal in a cavity formed in a connector.

  2. Description of the Related Art Conventionally, a wire harness used in an electric circuit of an automobile is connected to various electric components by a connector attached to the end portion thereof. For example, Patent Document 1 discloses a technique for mounting a plurality of electric wires with terminals to a connector.

JP 62-188186 A JP 2010-108828 A

  By the way, recently, in order to reduce the weight of a vehicle, the use of an aluminum wire instead of a copper wire as an insulated wire has been studied. However, in the case of an aluminum electric wire, it is necessary to make the electric wire size larger than the case where a copper wire is used because of conductivity. For this reason, the electric wire with a terminal will become thick in the crimping | crimped part (especially coating | coated barrel part crimped | bonded to the insulation coating of an insulated wire) of a crimp terminal. Therefore, it becomes difficult to mount the electric wire with terminal in the cavity of the connector, and it is necessary to prepare a new connector.

  In addition, in the connection portion between the aluminum electric wire and the crimp terminal made of a metal material mainly composed of copper, electric corrosion such as dissimilar metal corrosion is liable to occur due to liquid intrusion. Therefore, for example, as shown in Patent Document 2, an anticorrosive agent that prevents liquid from entering may be applied to the connection portion between the aluminum electric wire and the crimp terminal. In this case, the crimped portion of the crimp terminal in the terminal-attached electric wire is further thickened by the anticorrosive agent, and the problem that the terminal-attached electric wire cannot be satisfactorily inserted into the cavity of the individual tie becomes more remarkable.

  Therefore, an object of the present invention is to provide a technology that can satisfactorily mount a terminal-attached electric wire in a connector cavity even if the insulated electric wire becomes thick.

  In order to solve the above-described problem, the first aspect is that an insulated wire and a terminal-attached wire including a crimp terminal crimped to an end portion of the insulated wire, and an end portion of the terminal-attached wire are inserted into an internal cavity. A connector-equipped electric wire, wherein the crimp terminal of the terminal-equipped electric wire is crimped to an insulating coating portion of the insulated wire, and a covered barrel portion located outside the connector; A core wire barrel portion that is crimped to a core wire extending from an end of the insulating coating and located in the cavity of the connector.

  In addition, the second aspect is the electric wire with connector according to the first aspect, further comprising an anticorrosive agent applied to a connection portion between the insulated electric wire and the crimp terminal in the electric wire with terminal, The core wire of the insulated wire and the crimp terminal are formed of different types of metal materials, and the anticorrosive agent is formed from the portion where the covering barrel portion of the crimp terminal of the terminal-attached wire is crimped to the core wire barrel. It is applied to the region including the part where the part is crimped.

  Moreover, a 3rd aspect is an electric wire with a connector which concerns on a 2nd aspect, Comprising: The said corrosion inhibitor is formed with the nonelectroconductive material.

  Moreover, a 4th aspect is an electric wire with a connector which concerns on any 1 aspect from the 1st to the 3rd aspect, Comprising: The barrel part which connects the said covering barrel part and the said core wire barrel part in the said crimp terminal An inter-connection part consists only of the baseplate part which supports the said insulated wire from one side.

  Moreover, a 5th aspect is an electric wire with a connector which concerns on a 4th aspect, Comprising: From the said covering barrel part in the surface on the opposite side with respect to the surface which supports the said insulated wire to the said crimp terminal in the said electric wire with a terminal, Ribs are formed so as to rise in series over the connecting portion between the barrel portions to the core barrel portion.

  Moreover, a 6th aspect is an electric wire with a connector which concerns on any 1 aspect from the 1st to the 5th aspect, Comprising: The said crimp terminal of the said electric wire with a terminal is the several location in the said core wire of the said insulated wire A plurality of the core wire barrel portions that are crimped to each other.

  According to the electric wire with connector according to the first aspect, the thickest covered barrel portion of the electric wire with terminal is arranged outside the connector. Therefore, even when a relatively thick insulated wire is employed, it is possible to avoid the inconvenience that the end of the terminal-attached wire cannot be inserted into the connector cavity.

  Moreover, according to the electric wire with a connector which concerns on a 2nd aspect, an anticorrosive agent is applied to the connection part of an insulated wire and a crimp terminal, and can prevent dissimilar metal corrosion. Further, even if the terminal-attached electric wire becomes thicker at the covered barrel portion due to the application of the anticorrosive agent, the inconvenience that the end of the terminal-attached electric wire cannot be satisfactorily inserted into the cavity of the connector is avoided.

  Moreover, according to the electric wire with a connector which concerns on a 3rd aspect, between the covering barrel parts in a some electric wire with a terminal is electrically insulated by a nonelectroconductive anticorrosive. Therefore, electrical insulation between the covering barrel portions can be ensured without an additional operation for attaching a new insulating member.

  Moreover, in the crimp terminal of the electric wire with a connector according to the fourth aspect, a side wall portion standing on both sides of the insulated wire is formed in a portion (inter-barrel portion connecting portion) that connects the covering barrel portion and the core wire barrel portion. It has not been. Therefore, compared with the conventional crimp terminal in which the side wall part is provided in the connection part between barrel parts, the width | variety of the connection part between barrel parts in a crimp terminal can be formed small. As a result, it is possible to avoid the inconvenience that the anticorrosive agent applied to the connecting portion between the barrel portions in the crimp terminal is caught at the inlet of the cavity in the connector.

  Moreover, according to the electric wire with a connector which concerns on a 5th aspect, a connection part can be reinforced. Accordingly, when the electric wire with crimp terminal is attached to the connector, the electric wire with terminal can be prevented from being deformed at the connecting portion between the barrel portions.

  Moreover, according to the electric wire with a connector which concerns on a 6th aspect, since the crimping | compression-bonding area with a core wire can be increased, a crimp terminal can be fixed more firmly to an insulated wire, Furthermore, between a core wire and a crimp terminal. Can be sufficiently reduced.

It is a schematic exploded perspective view of the electric wire with a connector concerning a 1st embodiment. It is a schematic plan view of the electric wire with a terminal concerning a 1st embodiment. It is a schematic bottom view of the crimp terminal which concerns on 1st Embodiment. It is a schematic sectional drawing of the crimp terminal cut | disconnected in the position of the IV-IV line shown in FIG. It is the fragmentary top view which expanded the side part vicinity of the connection part between barrel parts of the crimp terminal in an electric wire with a terminal. It is a schematic plan view of the electric wire with a terminal concerning a 2nd embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the size and number of each part may be exaggerated or simplified as needed for easy understanding. The following embodiments are examples embodying the present invention, and are not examples of limiting the technical scope of the present invention.

<1. First Embodiment>
<1.1. Configuration>
FIG. 1 is a schematic exploded perspective view of a connector-equipped electric wire 1 according to the first embodiment. FIG. 2 is a schematic plan view of the terminal-attached electric wire 2 according to the first embodiment.

  The electric wire with connector 1 is a wire harness provided with a connector 3 to which a plurality of electric wires with terminals 2 are attached. The terminal-attached electric wire 2 includes an insulated wire 21, a crimp terminal 23 crimped to an end of the insulated wire 21, and the anticorrosive 4. In addition, drawing of the anticorrosive 4 is abbreviate | omitted in FIG.

  The insulated wire 21 includes a core wire 211 formed of aluminum and an insulating coating 213 formed of an insulating resin that covers the core wire 211.

  The crimp terminal 23 is formed of a metal member mainly composed of copper, the surface of which is plated with metal such as tin. The crimp terminal 23 includes a core wire barrel portion 231 that is crimped and crimped to the core wire 211 extending from the end of the insulating coating 213 at an end portion of the terminal-attached electric wire 2, and a coated barrel portion that is crimped and crimped to the end portion of the insulating coating 213. 233. Moreover, the crimp terminal 23 is provided with the contact part 235 electrically connected with the corresponding other party terminal in the front-end | tip part. The core wire barrel portion 231 and the covered barrel portion 233 are connected by a barrel portion connecting portion 237 including only a bottom plate portion that supports the insulated wire 21 from one side.

  In the terminal-equipped electric wire 2 shown in FIG. 1, the core wire 211 is made of aluminum, and the crimp terminal 23 is made of copper. That is, the insulated wire 21 and the crimp terminal 23 are formed of different types of different metals. However, the insulated wire 21 attached to the connector 3 may be formed of other conductors such as copper, and the crimp terminal 23 may be formed of a metal material other than copper.

  FIG. 3 is a schematic bottom view of the crimp terminal 23 according to the first embodiment. On the surface (bottom surface) opposite to the surface (support surface 23S) that supports the insulated wire 21 in the crimp terminal 23 of the terminal-attached electric wire 2, from the covering barrel portion 233 to the core wire barrel portion 231 through the connecting portion 237 between the barrel portions. Ribs 27 are formed so as to protrude in series. The height of the ribs 27 does not need to be uniform in the longitudinal direction, but is set to such a size that the mounting of the plurality of terminal-attached electric wires 2 on the connector 3 is not hindered.

  The ribs 27 are formed by press working such as embossing on the plate-shaped barrel connecting portion 237. Therefore, a groove 28 corresponding to the rib 27 is formed on the support surface 23 </ b> S in the connecting portion 237 between the barrel portions.

  In the example shown in FIG. 3, three ribs 27 are formed on the crimp terminal 23, but the number of ribs 27 may be changed as appropriate. In addition, the rib 27 is formed on the back surface of the support surface 23S, but may be formed on the support surface 23S. The rib 27 may be formed separately from the crimp terminal 23 and fixed by welding or an adhesive.

  FIG. 4 is a schematic cross-sectional view of the crimp terminal 23 cut along the line IV-IV shown in FIG. FIG. 5 is an enlarged partial plan view of the vicinity of the side portion of the inter-barrel connection portion 237 of the crimp terminal 23 in the terminal-attached electric wire 2. The covering barrel portion 233 includes a side wall portion 51 that is a crimping piece standing from the bottom plate portion. The core wire barrel portion 231 also has a side wall portion that becomes a pressure-bonding piece as in the case of the covering barrel portion 233, although detailed illustration is omitted.

  On the other hand, the connection part 237 between barrel parts is comprised only by the baseplate part from which the length of a width becomes narrow gradually as it goes to the connection part with the core barrel part 231 from the connection part with the coating | coated barrel part 233. Yes. For this reason, the widest portion of the connecting portion 237 between the barrel portions (the connecting portion with the covering barrel portion 233) is thinly formed by the thickness D of the side wall portion 51 of the covering barrel portion 233 (FIG. 4). And FIG. 5). Moreover, the narrowest part (connection part with the core wire barrel part 231) among the connection parts 237 between barrel parts is thinly formed by the thickness D of the side wall part (crimp piece) of the core wire barrel part 231 (FIG. 5).

  Returning to FIG. 1, the connector 3 is a member molded using, for example, a resin material. The connector 3 includes a frame body 31 that forms the outer peripheral portion thereof, and a cavity forming body 33 that is disposed inside the frame body 31 and forms a plurality of cavities 331. The cavity forming body 33 forms a partition that divides the space in the frame 31 into a plurality of cavities 331. The cavity forming body 33 and the frame body 31 may be formed integrally or separately. The cavity 331 constitutes a terminal accommodating chamber into which the distal end portion of the crimp terminal 23 in the terminal-attached electric wire 2 is inserted.

  Although not shown in the drawings, the inner wall portion of the cavity 331 is provided with a locking portion for locking and fixing the crimp terminal 23 portion of the terminal-attached electric wire 2. A part of the crimp terminal 23 (for example, the rear end portion of the contact portion 235) of the terminal-attached electric wire 2 accommodated in each cavity 331 is caught by the engaging portion, so that the rearward disconnection of the terminal-attached electric wire 2 is suppressed. Of course, the trailing-out of the terminal-attached electric wire 2 may be suppressed by other mechanisms.

  As shown in FIG. 2, in this embodiment, when the connector 3 is mounted on the terminal-attached electric wire 2, the cavity 331 accommodates the end portion closer to the core wire barrel portion 231 than the covering barrel portion 233. . That is, the terminal-attached electric wire 2 is attached to the connector 3 in a state where the core wire barrel portion 231 of the crimp terminal 23 in the electric wire 2 with terminal is disposed in the cavity 331 and the covering barrel portion 233 is disposed outside the cavity 331.

  In the connector 3 shown in FIG. 1, the cavity forming body 33 is formed to be shorter than the frame body 31 in the depth direction of the connector 3. For this reason, the position of the entrance portion of the cavity 331 is located behind the end of the frame 31. In this embodiment, since the covering barrel part 233 is brought out of the cavity 331 in the crimp terminal 2, the length (depth) of the cavity 331 is shorter than that of the conventional cavity. In this case, the cavity forming portion 33 portion is molded using a new molding die so as to match the length from the contact portion 235 of the crimp terminal 2 to the core wire barrel portion 231, and the frame body 31 portion is It can be molded with a conventional mold. However, the shape of the connector 3 is not limited to that of FIG. 1. For example, the length of the cavity forming body 33 in the depth direction may be the same as that of the frame body 31.

  The anticorrosive 4 is applied to a region including a portion of the crimped terminal 23 of the terminal-attached electric wire 2 from a portion where the covering barrel portion 233 is crimped to a portion where the core wire barrel portion 231 is crimped. Thus, the anticorrosive agent 4 is applied to the connection portion between the insulated wire 21 and the crimp terminal 23 in the terminal-attached wire 2. Thereby, generation | occurrence | production of the dissimilar-metal corrosion which is easy to generate | occur | produce in the connection part of the insulated wire 21 and the crimp terminal 23 can be suppressed. As the anticorrosive 4, a resin material (a thermoplastic resin such as polyamide resin or a thermosetting resin such as epoxy resin or silicon resin) or grease can be used.

  As shown in FIG. 1, a plurality of electric wires 2 with terminals are attached to the connector 3. For this reason, there exists a possibility that the covering barrel part 233 which has come out of the cavity 331 among the some electric wires 2 with a terminal may contact each other. Then, if a non-conductive thing is employ | adopted for the anticorrosive agent 4, the electrical insulation between the covering barrel parts 233 in the some electric wire 2 with a terminal can be ensured.

  As shown in FIG. 2, it is desirable that the portion located outside the cavity 331 in the crimp terminal 23 of the terminal-attached electric wire 2 is covered with the non-conductive anticorrosive 4. Thereby, the insulation between the some electric wires 2 with a terminal 2 can further be improved.

<1.2. Effect>
According to the connector-attached electric wire 1 according to the present embodiment, the portion of the covered barrel portion 233 that tends to be thickest among the electric wires 2 with terminals is arranged outside the connector 3. Therefore, even if the coated barrel portion 233 is thickened by applying an aluminum wire instead of the conventional general copper wire, the end of the terminal-attached wire 2 cannot be inserted into the cavity 331 of the connector 3. This problem is avoided.

  Moreover, the anticorrosive agent 4 is applied to the connection portion between the insulated wire 21 and the crimp terminal 23, so that corrosion of different metals can be prevented. In addition, even if the terminal-attached electric wire 2 becomes thicker at the covered barrel portion 233 due to the coating of the anticorrosive 4, the end of the terminal-attached electric wire 2 cannot be inserted into the cavity 331 of the connector 3 satisfactorily. Is avoided.

  Further, the non-conductive anticorrosive 4 electrically insulates the covered barrel portions 233 of the plurality of terminal-attached electric wires 2 from each other. Therefore, electrical insulation between the covering barrel portions 233 is ensured without additional work for attaching a new insulating member (for example, a heat-shrinkable tube (tube that shrinks in the radial direction by heating)). it can. However, insulation may be secured by attaching an insulating member to a portion of the terminal-attached electric wire 2 that protrudes from the cavity 331 such as the covering barrel portion 233.

  In addition, since the covering barrel portion 233 is disposed outside the cavity 331, the terminal-attached electric wire 2 is more easily deformed than in the case where the covering barrel portion 233 is disposed in the cavity 331 as in the related art. However, the rib 27 is provided in the connection part 237 between barrel parts, and the intensity | strength is reinforced. Accordingly, when the terminal-attached electric wire 2 is attached to the connector 3, it is possible to effectively suppress the terminal-attached electric wire 2 from being deformed by the barrel-to-barrel connecting portion 237.

  Moreover, in the crimp terminal 23 of the electric wire 2 with a terminal, the side wall part which stands in the both sides of the insulated wire 21 is not formed in the connection part 237 between barrel parts. Therefore, the crimp terminal 23 according to this embodiment can be formed with a smaller width of the barrel-to-barrel connection part 237 as compared with the conventional crimp terminal in which the side wall part is provided in the connection part between the barrel parts. As a result, it is possible to avoid the inconvenience that the anticorrosive agent 4 applied to the inter-barrel connecting portion 237 in the crimp terminal 23 is caught by the inlet of the cavity 331 in the connector 3.

<2. Second Embodiment>
FIG. 6 is a schematic plan view of a terminal-attached electric wire 2A according to the second embodiment. In the description of the present embodiment, elements having the same functions as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the terminal-attached electric wire 2 </ b> A according to the present embodiment, a crimp terminal 23 </ b> A is attached to the distal end portion of the insulated electric wire 21. The crimp terminal 23 </ b> A is different from the crimp terminal 23 according to the first embodiment in that the crimp terminal 23 </ b> A includes a plurality of core wire barrel portions 231 </ b> A and 231 </ b> A that are crimped to a plurality of locations in the core wire 211 of the insulated wire 21. The core wire barrel portions 231A and 231A are disposed inside the cavity 331A, and the covering barrel portion 233 is disposed outside the cavity 331A.

In the case of the terminal-attached electric wire 2 </ b> A according to the present embodiment, since the crimping area with the core wire 211 in the crimp terminal 23 </ b> A can be increased, the crimp terminal 23 </ b> A can be more firmly fixed to the insulated wire 21. For example, when the connector 3 is a conventional connector designed to be mounted in the cavity 331 up to the covered barrel portion of the electric wire with terminal, as shown in FIG. 6, the core wire is aligned with the relatively deep cavity 331. It is conceivable to extend the exposure length 211.
In such a case, the crimp terminal 23 can be firmly fixed to the insulated wire 21 by crimping the core wire barrel portions 231A and 231A to the extended core wire portion 211. Moreover, the contact resistance between the core wire 211 and the crimp terminal 23A can be effectively reduced by crimping the plurality of core wire barrel portions 231A and 231A to the insulated wire 21.

<3. Modification>
Although the embodiment has been described above, the present invention is not limited to the above, and various modifications are possible.

  For example, the connecting portion 237 between the barrel portions of the crimp terminals 23 and 23A may be formed only by the bottom plate portion, but it is also hindered to provide side wall portions that stand from the bottom plate portion on both sides of the connecting portion 237 between the barrel portions. I can't.

  4 has a cross section (cut cut along a plane perpendicular to the longitudinal direction) formed in a substantially flat plate shape, but is formed to be curved. May be.

  Furthermore, each element demonstrated in the said embodiment and modification can be suitably combined or abbreviate | omitted unless a contradiction arises mutually.

DESCRIPTION OF SYMBOLS 1 Electric wire with a connector 2,2A Electric wire with a terminal 21 Insulated electric wire 211 Core wire 213 Insulation coating 23,23A Crimp terminal 231,231A Core wire barrel part 233 Coating barrel part 235 Contact part 237 Connection part between barrel parts 23S Support surface 27 Rib 3 Connector 31 Frame body 33 Cavity forming body 331, 331A Cavity 4 Anticorrosive

Claims (6)

An insulated wire and a terminal-attached wire including a crimp terminal crimped to an end of the insulated wire;
A connector in which an end of the terminal-attached electric wire is inserted into an internal cavity;
An electric wire with a connector comprising:
The crimp terminal of the electric wire with terminal is
A coated barrel portion that is crimped to an insulating coating portion of the insulated wire and located outside the connector;
A core wire barrel portion that is crimped to a core wire extending from an end of the insulating coating in the insulated wire, and located in the cavity of the connector;
An electric wire with a connector. It is an electric wire with a connector according to claim 1,
An anticorrosive agent applied to the connecting portion between the insulated wire and the crimp terminal in the electric wire with terminal,
Further comprising
The core wire and the crimp terminal of the insulated wire are each formed of different types of metal materials,
The anticorrosive is
An electric wire with a connector, which is applied to a region including a portion where the covered barrel portion of the crimp terminal in the electric wire with terminal is crimped to a portion where the core barrel portion is crimped. It is an electric wire with a connector according to claim 2,
An electric wire with a connector, wherein the anticorrosive is formed of a non-conductive material. It is an electric wire with a connector given in any 1 paragraph of Claims 1-3,
In the crimp terminal, the connecting portion between the barrel portions that connects the coated barrel portion and the core wire barrel portion is an electric wire with a connector that includes only a bottom plate portion that supports the insulated wire from one side. It is an electric wire with a connector according to claim 4,
The crimp terminal in the terminal-attached electric wire has ribs protruding in series from the coated barrel portion to the core barrel portion through the connection portion between the barrel portions on the surface opposite to the surface supporting the insulated wire. A formed electric wire with a connector. It is an electric wire with a connector given in any 1 paragraph of Claims 1-5,
The said crimp terminal of the said electric wire with a terminal is an electric wire with a connector provided with the said some core wire barrel part crimped | bonded to the several location in the said core wire of the said insulated wire.

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