阅读说明：本技术 导体连接结构 (Conductor connection structure ) 是由 田中宏侑 水野英树 于 2021-05-27 设计创作，主要内容包括：本发明的目的是提供一种导体连接结构,其可以使高度方向上的小型化成为可能。导体连接结构(1)旨在用于将导体(3)连接至具有多个股线(21)的电线(2),其中导体(3)具有板状,并且其中导体连接结构被构造成使得多个股线对接地连接到导体的端面,多个股线预先具有与导体的端面(30)相同的板状。这使得能够通过使构成电线的多个股线预先构成与导体的端面相同的板状而将电线连接到导体的端面(30)。这可实现高度方向上的小型化。(The object of the present invention is to provide a conductor connection structure which can make miniaturization in the height direction possible. The conductor connection structure (1) is intended for connecting a conductor (3) to an electric wire (2) having a plurality of strands (21), wherein the conductor (3) has a plate shape, and wherein the conductor connection structure is configured such that the plurality of strands are butt-connected to an end face of the conductor, the plurality of strands having in advance the same plate shape as the end face (30) of the conductor. This makes it possible to connect the electric wire to the end face (30) of the conductor by making the plurality of strands constituting the electric wire in advance in the same plate shape as the end face of the conductor. This can realize miniaturization in the height direction.)

1. A conductor connecting structure for connecting a conductor to a wire having a plurality of strands,

wherein the conductor has a plate-like shape, and

wherein the conductor connecting structure is configured such that the plurality of strands are butt-joined to the end face of the conductor, the plurality of strands having in advance the same plate-like shape as the end face of the conductor.

2. The conductor connecting structure according to claim 1,

wherein the end face of the conductor has a rectangular shape having a width 1 to 8 times a thickness of the rectangular shape.

3. The conductor connection structure according to claim 1 or 2,

wherein the conductor is configured to have a plurality of thin plates stacked.

Technical Field

The present invention relates to a conductor connection structure.

Background

Automobiles are equipped with various types of electronic devices in which wiring harnesses are arranged to transmit, for example, electric power and/or control signals to such electronic devices. The wire harness includes a plurality of electric wires and a connector, wherein the wire harness is connected to the electronic device or another wire harness by fitting the connector with the connector of the electronic device or another wire harness.

Generally, an electric wire with a terminal constituting such a wire harness includes an electric wire and a terminal device to be mounted to an end of the electric wire (see, for example, patent document 1).

Patent document 1 discloses an electric wire with a terminal manufactured by bonding the electric wire to a male terminal as a terminal device via ultrasonic waves. The male terminal includes an insertion member configured to be inserted into the female terminal using a band-shaped metal plate, and a wire engagement portion configured to engage the wire thereto. The wire bonding portion is formed by bending the wire bonding portion in a direction orthogonal to an extending direction of the insertion element. With such electric wires, when the core portion of the electric wire should be joined to the wire joint portion of the male terminal, the distal end face of the core portion of the electric wire is pressed against the wire joint portion of the male terminal, and ultrasonic vibration is applied to the interface between the wire joint portion and the distal end face of the core portion to join them via ultrasonic by atomic bonding. In this way, the core of the electric wire is joined to the wire joining portion of the male terminal.

Reference list

Patent document

Patent document 1: JP2014-207108A

Disclosure of Invention

However, with the conventional electric wire with a terminal, the wire engaging portion of the terminal is formed by being bent in the height direction orthogonal to the extending direction of the insertion member. This results in an increase in size due to the extension of the height dimension.

The object of the present invention is to provide a conductor connection structure which can make miniaturization in the height direction possible.

In order to achieve the object, the present invention according to a first aspect provides a conductor connecting structure for connecting a conductor to an electric wire having a plurality of strands, wherein the conductor is plate-shaped, and wherein the conductor connecting structure is configured such that the plurality of strands are butt-connected to an end face of the conductor, the plurality of strands having in advance the same plate shape as the end face of the conductor.

The present invention according to a second aspect provides the conductor connecting structure according to the first aspect, wherein the end face of the conductor has a rectangular shape whose width is 1 to 8 times the thickness of the rectangular shape.

The present invention according to a third aspect provides the conductor connecting structure according to the first or second aspect, wherein the conductor is configured to have a plurality of thin plates stacked.

According to the first aspect, the conductor has a plate shape, and the conductor connecting structure is configured such that the plurality of strands, which have previously the same plate shape as the end face of the conductor, are butt-connected to the end face of the conductor. This makes it possible to connect the electric wire to the end face of the conductor by constructing in advance a plurality of strands constituting the electric wire in the same plate shape as the end face of the conductor without conventionally bending the wire engagement portion of the terminal in a direction orthogonal to the extending direction of the insertion element. This can realize miniaturization in the height direction.

Drawings

Fig. 1 is a perspective view of an electric wire with a conductor to which a conductor connecting structure according to an embodiment of the invention is applied;

fig. 2 shows in (a) a terminal end face of a plurality of strands constituting an electric wire, and in (B) a conceptual diagram of an end face of a conductor;

FIG. 3 is a perspective view of the construction of the conductor; and

fig. 4 is a view for explaining the effect of the present invention, in which a table showing connectability, mechanical strength, and electrical conductivity properties of different width-height ratios of connection portions between a plurality of strands and a conductor is given.

List of reference marks

1 electric wire with conductor (conductor connecting structure)

2 electric wire

21 ply yarn

3 conductor

30 end face of conductor

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to fig. 1 to 4. Fig. 1 shows a perspective view of an electric wire with a conductor to which a conductor connecting structure according to an embodiment of the present invention is applied. The electric wire 1 having a conductor according to the present embodiment has a conductor connection structure applied thereto, in which the electric wire 1 constitutes a wire harness arranged in, for example, an automobile.

As shown in fig. 1, an electric wire 1 includes a coated electric wire 2 (hereinafter referred to as "electric wire 2") and a conductor 3. According to the present embodiment, the direction in which the electric wire 2 and the conductor 3 are aligned is designated by an arrow Y, the direction (up-down direction) orthogonal (intersecting) to the arrow Y is designated by an arrow Z, and the direction (left-right direction) orthogonal to both the arrow Y and the arrow Z is designated by an arrow X. Further, the conductor 3 side may be referred to as "forward" and/or "front", while the wire 2 side opposite thereto may be referred to as "backward" and/or "rear".

As shown in fig. 1, the electric wire 2 includes: a core strand 22 as a bundle of linear strands 21 having electrical conductivity; and a covering portion 23 for applying an insulating coating to the core wire bundle 22. With this electric wire 2, the core wire bundle 22 is exposed by peeling the covering 23 at the leading end portion 2f of the electric wire 2.

As shown in fig. 2(a), the core strands 22 are formed by joining a plurality of strands 21 and thus joining the strands 21 to each other via ultrasound. Further, in the ultrasonic bonding state, the core wire bundle 22 is configured to have the same shape as the end face 30 of the conductor 3 described below. The core wire bundle 22 according to the present embodiment is plate-shaped having a rectangular cross section, which has a width b (arrow X) 8 times its height a (arrow Z). Further, as shown in fig. 2(a), the distal end face 20 of the core wire bundle 22 is configured to be positioned in a ZX plane orthogonal to the front-rear direction (the direction of the arrow Y). The distal end faces 20 of the core wire bundles 22 are brought into contact with the end faces 30 of the conductors 3 to electrically connect (butt-connect) the core wire bundles 22 to the conductors 3.

Here, the term "butt connection" refers to a state in which the distal end faces 20 of the core wire bundles 22 are pressed against the end faces 30 of the conductors 3 so that the conductors 3 and the core wire bundles 22 are electrically connected to each other, as shown in fig. 1. A connecting portion 1a (shown in fig. 1) between the core wire bundle 22 and the conductor 3 may be joined by welding or soldering to maintain an electrical connection state between the core wire bundle 22 and the conductor 3.

The conductor 3 is made of a metal having conductivity. As shown in fig. 3, the conductor 3 includes six (a plurality of) thin plates 3A (which may be bus bars) stacked. Further, the conductor 3 has a plate shape whose width B (arrow X) is 8 times its height a (thickness, arrow Z), as shown in fig. 2 (B). It should be noted that in fig. 2(B), the thin plate 3A is omitted from the conductor 3, and the general shape of the conductor 3 is conceptually shown.

With this conductor 3, the end face 30 thereof to be connected to the core wire bundle 22 extends in the ZX plane orthogonal to the forward-rearward direction (arrow Y) such that the end face 30 is opposed to the distal end face 20 of the core wire bundle 22, as shown in fig. 2 (B). Further, the end face 30 of the conductor 3 is plate-shaped with a rectangular cross section, and its width B (arrow X) is 8 times as large as its height a (arrow Z), as shown in fig. 2 (B). Although the conductor 3 according to the present embodiment is composed of a plurality of thin plates 3A, it is to be noted that the conductor 3 may be composed of a single metal sheet (bus bar).

Such an electric wire 1 with a conductor is assembled according to the following procedure. First, with the electric wire 2, the covering 23 is peeled off at the leading end portion 2f of the electric wire 2 to expose the plurality of strands 21, as shown in fig. 1. Subsequently, the strands 21 are joined via ultrasound, wherein the strands 21 are configured in a plate shape having a rectangular cross section and a width b (arrow X), wherein the width b is 8 times the height a (arrow Z), thereby forming the core strand 22. At this time, the distal end face 20 of the core wire bundle 22 is formed to have substantially the same shape as the end face 30 of the conductor 3. Then, the end face 20 of the core wire bundle 22 is butt-connected to the end face 30 of the conductor 3. In this way, the electric wire 2 is electrically connected to the end face 30 of the conductor 3 to manufacture the completed electric wire 1 having the conductor.

According to the embodiment as described above, the conductor 3 has a plate-like shape, and is configured such that the plurality of strands 21 are butt-joined to the end face 30 of the conductor 3, the plurality of strands having in advance the same plate-like shape as the end face 30 of the conductor 3. This makes it possible to connect the electric wire 2 to the end face 30 of the conductor 3 by constituting the plurality of strands 21 of the electric wire 2 in the same plate-like configuration as the end face 30 of the conductor 3 in advance. This can realize miniaturization in the height direction.

Further, the conductor 3 is constituted by a plurality of thin plates 3A stacked. This enables the conductor 3 to have a desired thickness by changing the number of thin plates 3A.

The inventors of the present invention confirmed the effect of the present invention with respect to different ratios of the width b (arrow X) to the height a (arrow Z) of the connection portion 1a between the core harness 22 and the conductor 3 (the terminal end face 20 of the core harness 22 and the end face 30 of the conductor 3). Fig. 4 shows the results. In fig. 4, "smal" indicates "good (pass)", "Δ" indicates "partial defect (fail)", "x" indicates "defect (fail)", and "-" indicates "no confirmation". According to fig. 4, in the case where the ratio of the width b to the height a of the connection portion 1a between the core wire bundle 22 and the conductor 3 is between 1:1 and 1:8, the connectability, the connection strength, and the electrical conductivity are all "good", in the case where the ratio is 1:9, the resultant connectability, the connection strength, and the electrical conductivity are all "partial defect (partial non-bonding)", and in the case where the ratio is 1:10, the resultant is "defect (non-bonding)" or "non-confirmation". In this way, it was confirmed that in the case where the ratio of the width b to the height a of the connection portion 1a between the core wire bundle 22 and the conductor 3 was between 1:1 and 1:8, the result was "good" in all of the connectability, the connection portion strength and the conductive performance.

In this way, good connectability, electrical conductivity, and connection strength can be ensured by the end face 30 of the conductor 3, the end face 30 of the conductor 3 having a rectangular shape with a width b (arrow X) of 1 to 8 times the height a (thickness, arrow Z).

It should be noted that the present invention is not limited to the above-described embodiments, but includes other embodiments that can achieve the object of the present invention, wherein the present invention also includes modifications described below.

According to the above-described embodiment, the end face 20 of the core wire bundle 22 and the end face 30 of the conductor 3 have a rectangular shape. However, their shapes are not limited thereto. May include an oval shape having a width (arrow X) greater than a height (arrow Z).

Although the best configurations, methods and the like for carrying out the present invention are disclosed in the above description, the present invention is not limited thereto. That is, although the present invention has been particularly shown and described mainly with reference to specific embodiments, the shape, material characteristics, amount or other detailed features of the above-described embodiments may be modified in various ways by those skilled in the art without departing from the scope of the technical idea and purpose of the present invention. Therefore, the description having the defined shape, material characteristics, etc. according to the above disclosure is not limiting the present invention, but is merely illustrative in order to more easily understand the present invention, so that the description using the names of the elements without limiting a part or all of the shape, material characteristics, etc. thereof is also included in the present invention.