JP2022024261A - Terminal-equipped wire - Google Patents

Abstract

To provide a terminal-equipped wire that can maintain anticorrosion reliability even when bending stress is applied to a wire.SOLUTION: A terminal-equipped wire 1, 1A includes a wire 11 having a conductor 12 and a covering portion 13 covering the conductor, a terminal 2 connected to the wire, and a sealing portion 3 covering an exposed portion of the conductor with the conductor and the terminal connected to each other, and the terminal includes an electrical connection portion 222 that is electrically connected to the conductor, and a machine connection portion 223 that is mechanically connected to the covering portion, and further includes an exterior member 4 made of a flexible material and exteriorized by the wire, and the exterior member is continuously provided from the machine connection portion to the covering portion in a state where the terminal is connected to the wire.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electric wire with a terminal.

A wide variety of electronic devices are mounted on automobiles, and wire harnesses are arranged to transmit electric power, control signals, and the like to the electronic devices. Aluminum may be used as the material of the conductor core wire as the electric wire constituting such a wire harness. In connecting an aluminum electric wire having such an aluminum conductor core wire (hereinafter referred to as an electric wire) and a terminal, a technique for preventing corrosion at the connection portion between the electric wire and the terminal is disclosed (see, for example, Patent Document 1). .).

Patent Document 1 discloses an electric wire with a terminal including an electric wire, a terminal connected to the electric wire, and a molded portion covering the connection portion between the electric wire and the terminal. The terminal includes a mating connection portion connected to the mating terminal and an electric wire connecting portion connected to the electric wire. The wire connection portion is crimped and connected to the core wire of the wire. In the mold portion, the wire connection portion of the terminal is crimped and connected to the core wire of the wire, and the wire connection portion of the terminal surrounds the contact portion with the core wire of the wire in a liquidtight manner. The mold portion (sealing portion) is formed so as to extend from between the mating connection portion of the terminal and the wire connection portion to the covering portion of the wire.

Japanese Unexamined Patent Publication No. 2017-76455

However, in the conventional electric wire with a terminal, the mold portion covers from between the mating connection portion of the terminal and the electric wire connection portion to the covering portion of the electric wire to ensure corrosion resistance, but when bending stress acts on the electric wire. In addition, there is a case where it is difficult to secure a predetermined anticorrosion performance because the airtightness is impaired due to the gap between the covering portion and the molded portion of the electric wire.

An object of the present invention is to provide an electric wire with a terminal that can maintain anticorrosion reliability even when bending stress is applied to the electric wire.

In order to solve the above-mentioned problems and achieve the object, the invention according to claim 1 comprises a conductor, an electric wire having a covering portion covering the conductor, a terminal connected to the electric wire, the conductor and the terminal. Is a terminal-equipped electric wire provided with a sealing portion that covers an exposed portion of the conductor in a connected state, wherein the terminal is an electric connection portion that is electrically connected to the conductor and a machine that covers the covering portion. With a mechanical connection portion to be connected, an exterior member made of a flexible material and exterior to the electric wire, and the terminal connected to the electric wire, the exterior member is said to have the same. It is a terminal-equipped electric wire characterized in that it is continuously provided from the machine connection portion to the covering portion.

The invention according to claim 2 is the invention according to claim 1, wherein a housing for accommodating the terminal is provided, and a part of the exterior member is the housing in a state where the terminal is accommodated in the housing. It is characterized in that it is provided so as to protrude from the.

The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the exterior member is exteriorized by the machine connection portion.

The invention according to claim 4 is the invention according to claim 1 or 2, wherein the exterior member is provided between the mechanical connection portion and the covering portion, and is provided by the mechanical connection portion together with the electric wire. It is characterized by being crimped and connected.

The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, the exterior member is composed of a heat-shrinkable tube that shrinks when heated. And.

According to the first aspect of the present invention, the electric wire having the conductor and the covering portion covering the conductor, and the sealing portion covering the exposed portion of the conductor in a state where the conductor and the terminal are connected are provided, and the terminal is provided. Has an electrical connection that is connected to a conductor and a mechanical connection that is connected to a coating, has an exterior member that is made of a flexible material and is exteriorized by an electric wire, and a terminal is attached to the electric wire. In the connected state, the exterior member is continuously provided from the machine connection portion to the covering portion. According to this, in the electric wire, the bending rigidity of the portion where the exterior member is exteriorized is increased. Here, in the case of a configuration without an exterior member, the bending position of the electric wire when bending stress is applied to the electric wire is near the boundary position between the electric wire and the mechanical connection portion of the terminal, and the electric wire and the mechanical connection portion are connected to each other. Although there may be a gap between them, the exterior member of the present invention is provided continuously from the mechanical connection portion to the covering portion, so that the bending position of the electric wire when bending stress is applied to the electric wire can be determined. It is shifted near the end (rear end) away from the terminal of the exterior member. Further, when the bending stress is applied to the electric wire, the exterior member is deformed together with the electric wire, so that the gap generated between the electric wire and the exterior member can be reduced. That is, since the exterior member is provided, the bending position of the electric wire when bending stress is applied to the electric wire is shifted to the rear end of the exterior member, and the exterior member is deformed together with the electric wire, so that the electric wire and the exterior are formed. Since the gap generated between the member and the member can be reduced, the anticorrosion reliability can be maintained while maintaining the airtightness between the electric wire and the terminal.

It is a perspective view which shows the electric wire with a terminal which concerns on one Embodiment of this invention. It is sectional drawing which shows the state which the electric wire with a terminal is housed in a housing. (A) to (D) are perspective views for explaining a procedure for manufacturing the electric wire with a terminal. It is a side view which shows the electric wire with a terminal. It is a figure for demonstrating the operation effect of this embodiment, and is the side view which shows the state which bending stress acted on the electric wire with a terminal. It is a side view which shows the modification of the electric wire with a terminal. (A) to (C) are side views for explaining the procedure for manufacturing the said electric wire with a terminal.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view showing an electric wire 1 with a terminal according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state in which the electric wire 1 with terminals is housed in the housing 5. As shown in FIG. 2, the electric wire 1 with a terminal constitutes a wire harness 10 housed in a housing 5 and distributed to an automobile.

As shown in FIG. 2, the wire harness 10 includes a coated electric wire 11 having a core wire 12 (conductor) and a covering portion 13 (hereinafter referred to as an electric wire), a terminal 2 connected to the electric wire 11, and a core wire 12 and a terminal 2. It is provided with a sealing portion 3 that covers the connection portion (substituting the reference numeral 3), an exterior member 4 that is externally attached to the electric wire 11, and a housing 5 that accommodates the terminal 2. The electric wire 11, the terminal 2, the sealing portion 3, and the exterior member 4 constitute the electric wire 1 with a terminal.

As shown in FIG. 1, the electric wire 11 includes a core wire 12 (conductor) and an insulating covering portion 13 that covers the core wire 12. The core wire 12 is configured to contain aluminum. In other words, the electric wire 11 is an aluminum electric wire or an aluminum alloy electric wire. In each terminal portion 11A of the electric wire 11, the covering portion 13 is peeled off to expose a part of the core wire 12 (hereinafter, may be referred to as a core wire exposed portion 12A). In the present embodiment, in the axial direction of the electric wire 11, the side where the core wire exposed portion 12A is provided is referred to as "tip side", and the side where the covering portion 13 is provided is referred to as "base end side". be.

The terminal 2 is made of copper or a copper alloy. As shown in FIG. 1, the terminal 2 has a mating connection portion 21 connected to a mating terminal (not shown) and a wire connecting portion connected to each terminal portion 11A of the wire 11 continuously to the mating connecting portion 21. 22 and.

As shown in FIG. 2, the electric wire connecting portion 22 is a mounting portion 221 on which each terminal portion 11A of the electric wire 11 is mounted, and a core wire exposed portion 12A (core wire of the wire 11) which is continuous with the mounting portion 221. It is provided with an electrical connection portion 222 that is electrically connected to the exposed portion) and a mechanical connection portion 223 that is continuously connected to the mounting portion 221 and is mechanically connected to the covering portion 13 of the electric wire 11.

The mechanical connection portion 223 is provided at a position separated from the electrical connection portion 222 on the proximal end side by a predetermined dimension. In the following, the separated portion between the mechanical connection portion 223 and the electrical connection portion 222 may be referred to as an “intermediate portion 224”.

As shown in FIG. 2, the electrical connection portion 222 is located between the mating connection portion 21 and the intermediate portion 224. The electrical connection portion 222 has a pair of core wire crimping pieces 222A and 222A extending from the mounting portion 221 and crimping and crimping the core wire exposed portion 12A of the electric wire 11. The machine connection portion 223 has a pair of covering crimping pieces 223A and 223A extending from the mounting portion 221 and crimping and crimping each terminal portion 11A of the electric wire 11.

When such a terminal 2 is connected to each terminal portion 11A of the electric wire 11, the covering portion 13 in each terminal portion 11A of the electric wire 11 is peeled off in advance to form the core wire exposed portion 12A. Next, each terminal portion 11A of the electric wire 11 is placed on the mounting portion 221 of the terminal 2, and the core wire exposed portion 12A of the electric wire 11 is crimped and crimped with the pair of core wire crimping pieces 222A and 222A, and the pair of coated crimping pieces 223A. At 223A, the covering portion 13 of the electric wire 11 is crimped and crimped. In this way, the electrical connection portion 222 is electrically connected to each terminal portion 11A of the electric wire 11, the mechanical connection portion 223 is mechanically connected to each terminal portion 11A of the electric wire 11, and the terminal 2 is each terminal portion of the electric wire 11. It is connected to 11A.

In the sealing portion 3, the core wire exposed portion 12A of the electric wire 11 is placed on the mounting portion 221 and crimped to the pair of core wire crimping pieces 222A and 222A, and the molten UV curable resin is exposed to the core wire. It is formed by being applied and cured so as to cover the portion 12A, and is configured to suppress corrosion of the core wire exposed portion 12A. In the present embodiment, in the sealing portion 3, the core wire exposed portion 12A is placed on the mounting portion 221 and the melted UV curable resin is crimped by the pair of core wire crimping pieces 222A and 222A. , The portion corresponding to the intermediate portion 224 of the terminal 2, the mounting portion 221 and the pair of core wire crimping pieces 222A and 222A, and the pair of core wire crimping pieces 222A and 222A in the core wire exposed portion 12A, the protruding portion 120A on the tip end side (FIG. 4). It is formed by being applied and cured so as to cover) (shown in 5), and the sealing portion 3 suppresses corrosion of the core wire exposed portion 13B.

The exterior member 4 is made of a flexible material, is formed in a tubular shape (cylindrical shape), and has a predetermined axial dimension. The exterior member 4 has a flexural rigidity higher than that of the electric wire 11, and when a bending stress is applied to the electric wire 11 in a state of being exteriorized by the electric wire 11, the end portion 4b on the base end side of the exterior member 4 The vicinity is configured to be the bending position of the electric wire 11.

Further, the exterior member 4 is composed of a heat-shrinkable tube configured to shrink when heated and to harden in the contracted state. Such an exterior member 4 is positioned at a predetermined position with the terminal 2 connected to the electric wire 11, heated, and contracted so as to be exteriorized to the electric wire 11 and the terminal 2. As described above, since the exterior member 4 is composed of the heat-shrinkable tube, the airtightness of the connection portion between the electric wire 11 and the terminal 2 is ensured.

Such an exterior member 4 is positioned at a predetermined position with the terminal 2 connected to the electric wire 11, and is covered with the end portion 4a (hereinafter referred to as the tip portion) on the tip side in a state of being heated and contracted. In the portion 13, it is located between the electrical connection portion 222 and the mechanical connection portion 223, and the end portion 4b on the proximal end side (hereinafter referred to as the proximal end portion) is separated from the mechanical connection portion 223 in the covering portion 13 toward the proximal end side. It is positioned in the same position. In the following, the position where the exterior member 4 is positioned with respect to the electric wire 11 and the terminal 2 may be referred to as a predetermined position.

As shown in FIG. 2, the housing 5 is formed by four peripheral walls 51 constituting a terminal accommodating chamber 50 for inserting and accommodating the terminal 2. The terminal accommodating chamber 50 has openings 50a and 50b on the insertion direction side (tip side) of the terminal 2 and on the opposite side (base end side) of the insertion direction, respectively, and is connected to the terminal 2 from the opening 50a on the tip side. The other terminal (not shown) is inserted. Further, one of the four peripheral walls 51A is provided with a lance 52 which is formed so as to extend in the insertion direction and locks the terminal 2.

With the terminal 2 housed in such a housing 5, a part of the exterior member 4 is provided so as to project from the rear end (base end side) of the housing 5. That is, a part of the exterior member 4 on the distal end side is housed in the housing 5, and a part on the proximal end side is provided so as to project from the housing 5. According to this, the bending position of the electric wire 11 when the bending stress is applied to the electric wire 11 is shifted to the vicinity of the rear end 4b away from the housing 5 of the exterior member 4.

The procedure for manufacturing the electric wire 1 with a terminal having the above-described configuration will be described with reference to FIGS. 3 (A) to 3 (D). First, the covering portion 13 in each terminal portion 11A of the electric wire 11 is peeled off in advance to form the core wire exposed portion 12A. Next, as shown in FIG. 3A, the exterior member 4 is inserted close to the core wire exposed portion 12A of the electric wire 11 and moved to the base end side of the electric wire 11.

Next, as shown in FIG. 3B, each terminal portion 11A of the electric wire 11 is placed on the mounting portion 221 of the terminal 2, and the core wire exposed portion 12A of the electric wire 11 is formed by the pair of core wire crimping pieces 222A and 222A. Crimping and crimping is performed, and the covering portion 13 of the electric wire 11 is crimped and crimped with a pair of covering crimping pieces 223A and 223A. In this way, the electrical connection portion 222 is electrically connected to each terminal portion 11A of the electric wire 11, the mechanical connection portion 223 is mechanically connected to each terminal portion 11A of the electric wire 11, and the terminal 2 is each terminal portion of the electric wire 11. It is connected to 11A.

After that, as shown in FIG. 3C, the sealing portion 3 is formed so as to cover the core wire exposed portion 12A and the crimped portion. Finally, as shown in FIG. 3D, the exterior member 4 is moved toward the tip end side, and the exterior member 4 is positioned at a predetermined position. In this state, the exterior member 4 is heated and shrunk. As a result, the exterior member 4 is exteriorized by the electric wire 11. In this way, the electric wire 1 with terminals is manufactured.

As shown in FIGS. When the insertion further progresses and the terminal 2 reaches a predetermined position in the terminal accommodating chamber 50, the lance 52 locks the terminal 2. In this way, the terminal 2 is accommodated in the terminal accommodating chamber 50. With the terminal 2 housed in the terminal storage chamber 50, a part of the exterior member 4 is housed in the housing 5 on the distal end side, and a part on the proximal end side is provided so as to project from the housing 5. In this way, the electric wire 1 with terminals is housed in the housing 5 and constitutes a wire harness 10 to be distributed to the automobile.

According to the above-described embodiment, as shown in FIG. 5, in the electric wire 1 with a terminal, the bending position of the electric wire 11 when the bending stress is applied to the electric wire 11 is the end portion 4b away from the terminal 2 of the exterior member 4. When the bending stress F acts on the electric wire 11 near the (rear end), the exterior member 4 is deformed together with the electric wire 11, and the gap generated between the electric wire 11 and the exterior member 4 becomes small. That is, since the exterior member 4 is provided, the exterior member 4 is deformed together with the electric wire 11 while shifting the bending position of the electric wire 11 to the rear end 4b of the exterior member 4 when the bending stress is applied to the electric wire 11. By doing so, the gap generated between the electric wire 11 and the exterior member 4 can be reduced. As a result, it is possible to maintain the anticorrosion reliability while maintaining the airtightness of the connection portion between the electric wire 11 and the terminal 2.

Further, a housing 5 for accommodating the terminal 2 is provided, and the exterior member 4 is provided so as to project from the housing 5. According to this, the bending position of the electric wire 11 when the bending stress is applied to the electric wire 11 is near the end portion 4b (rear end) away from the housing 5 of the exterior member 4. As a result, it is possible to maintain the anticorrosion reliability while maintaining the airtightness of the connection portion between the electric wire 11 and the terminal 2 in the state of being housed in the housing 5 in which the terminal 2 is housed.

Further, the exterior member 4 is exteriorized by the machine connection portion 223. According to this, the machine connection portion 223 is protected by the exterior member 4, and the connection portion of the electric wire 11 and the terminal 2 is connected from the outside as compared with the case where the exterior member 4 is located inside the machine connection portion 223. Can be less susceptible to.

Further, the exterior member 4 is composed of a heat-shrinkable tube that shrinks when heated. According to this, the exterior member 4 can be exteriorized on the electric wire 11 with good workability. That is, it is possible to improve workability when manufacturing the electric wire 1 with terminals.

Next, a modification of the electric wire with a terminal will be described with reference to FIGS. 6 and 7. FIG. 6 is a side view showing a modified example of the electric wire with a terminal. 7A to 7C are side views for explaining a procedure for manufacturing an electric wire with a terminal. As shown in FIG. 6, the electric wire 1A with a terminal includes an electric wire 11, a terminal 2 connected to the electric wire 11, and a sealing portion 3 covering a connection portion between the core wire 12 and the terminal 2 (substituting reference numeral 3). An exterior member 14 to be exteriorized by the electric wire 11 is provided. In the electric wire 1A with terminals, the exterior member 14 is provided between the machine connecting portion 223 and the covering portion 13, and is crimped and connected together with the electric wire 11 by the machine connecting portion 223.

The procedure for manufacturing the terminal-equipped electric wire 1A having the above-described configuration will be described with reference to FIGS. 7A to 7C. As shown in FIG. 7A, the exterior member 14 is inserted close to the core wire exposed portion 12A of the electric wire 11 and positioned at a predetermined position. In this state, the exterior member 14 is heated and contracted. As a result, the exterior member 14 is exteriorized by the electric wire 11. Next, as shown in FIG. 7B, each terminal portion 11A of the electric wire 11 is placed on the mounting portion 221 of the terminal 2, and the core wire exposed portion 12A of the electric wire 11 is formed by the pair of core wire crimping pieces 222A and 222A. Crimping and crimping is performed, and the exterior member 14 is crimped and crimped together with the covering portion 13 of the electric wire 11 with a pair of covering crimping pieces 223A and 223A. In this way, the exterior member 14 is provided between the machine connecting portion 223 and the covering portion 13, and is crimped and connected together with the electric wire 11 by the machine connecting portion 223, and the terminal 2 is connected to each terminal portion 11A of the electric wire 11. Ru. After that, as shown in FIG. 3C, the sealing portion 3 is formed so as to cover the core wire exposed portion 12A and the crimped portion. In this way, the electric wire 1A with a terminal is manufactured.

According to the above-described embodiment, the exterior member 14 is provided between the machine connecting portion 223 and the covering portion 13, and is crimped and connected together with the electric wire 11 by the machine connecting portion 223. According to this, since the exterior member 14 is crimped and connected together with the electric wire 11 by the mechanical connection portion 223, the mechanical connection strength is increased and it is difficult to disconnect even when the bending stress F acts on the electric wire 11. Can be done.

The present invention is not limited to the above embodiment, but includes other configurations and the like that can achieve the object of the present invention, and the present invention also includes modifications and the like as shown below.

In the above embodiment, the exterior members 4 and 14 are composed of heat-shrinkable tubes, but the present invention is not limited thereto. The exterior member may be composed of an adhesive tape. In this case, the exterior member may be configured by being wound around a predetermined position of the electric wire 11 and the terminal 2.

Further, in the above-described embodiment, in the sealing portion 3, the core wire exposed portion 12A is placed on the mounting portion 221 and is crimped and crimped by a pair of core wire crimping pieces 222A and 222A, and the melted UV curing is performed. In the portion where the resin corresponds to the intermediate portion 224 of the terminal 2, the mounting portion 221 and the pair of core wire crimping pieces 222A and 222A, and the core wire exposed portion 12A, the pair of core wire crimping pieces 222A and the protruding portion 120A on the tip side from 222A ( It is formed by being applied and cured so as to cover (shown in FIGS. 4 and 5), and the sealing portion 3 suppresses corrosion of the core wire exposed portion 13B, but the present invention is limited thereto. is not it. In the sealing portion, a portion exposed to at least the outside in the core wire exposed portion 12A in a state where the core wire exposed portion 12A is placed on the mounting portion 221 and crimped by a pair of core wire crimping pieces 222A and 222A. It suffices to cover it, and in the core wire exposed portion 12A, the portion corresponding to the intermediate portion 224 of the terminal 2 and the protruding portion 120A on the tip side of the pair of core wire crimping pieces 222A and 222A in the core wire exposed portion 12A (in FIGS. 4 and 5). It may be configured to cover (shown). That is, the sealing portion is configured to cover the portion corresponding to the intermediate portion 224 of the terminal 2 in the core wire exposed portion 12A and the protruding portion 120A on the tip side of the pair of core wire crimping pieces 222A and 222A in the core wire exposed portion 12A. If so, it shall be included in the scope of rights of the present invention.

In addition, the best configuration, method, and the like for carrying out the present invention are disclosed in the above description, but the present invention is not limited thereto. That is, the present invention is primarily illustrated and described with respect to a particular embodiment, but without departing from the scope of the technical idea and object of the present invention, with respect to the embodiments described above. Various modifications can be made by those skilled in the art in terms of material, quantity, and other detailed configurations. Therefore, the description limiting the shapes, materials, etc. disclosed above is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. Therefore, those shapes, materials, etc. The description by the name of the member excluding a part or all of the limitation such as is included in the present invention.

1, 1A Electric wire with terminal 2 Terminal 3 Sealing part 4, 14 Exterior member 5 Housing 11 Coated electric wire 12 Core wire (conductor)
12A core wire exposed part (exposed part of core wire)
13 Cover 222 Electrical connection 223 Mechanical connection

Claims (5)

It is provided with a conductor and an electric wire having a covering portion covering the conductor, a terminal connected to the electric wire, and a sealing portion covering the exposed portion of the conductor with the conductor connected to the terminal. It is an electric wire with a terminal
The terminal has an electrical connection portion electrically connected to the conductor and a mechanical connection portion mechanically connected to the covering portion.
It comprises an exterior member made of a flexible material and exteriorized by the wire.
An electric wire with a terminal, wherein the exterior member is continuously provided from the mechanical connection portion to the covering portion in a state where the terminal is connected to the electric wire. A housing for accommodating the terminals is provided.
The electric wire with a terminal according to claim 1, wherein a part of the exterior member is provided so as to project from the housing in a state where the terminal is housed in the housing. The electric wire with a terminal according to claim 1 or 2, wherein the exterior member is exterior to the machine connection portion. The terminal with a terminal according to claim 1 or 2, wherein the exterior member is provided between the machine connecting portion and the covering portion, and is crimped and connected together with the electric wire by the machine connecting portion. Electrical wire. The electric wire with a terminal according to any one of claims 1 to 4, wherein the exterior member is composed of a heat-shrinkable tube that shrinks when heated.

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