JP2000106225A - Pressure contact terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To insert a flexible conductor into a slot without generating disconnection of a wire by installing the slot having the specified width, forming a slant for guiding the electric wire into the opening of the slot, and forming the intersecting point of the slanted and a straight part of the slot in an arc shape. SOLUTION: An electric wire 2 consists of conductors 2a and an insulating cover 2b, strand diameter is thin, and the number of wires is numerous making it flexible. A pressure contact terminal 3 has a slot 3a formed so as to have a specified slot width WS, in which contact resistance of the strands of the conductor 2a exists in a specified region, and a slant 3b for guiding the electric wire 2 is formed in an opening of the slot 3a. An intersecting point 3c of the slant 3b and a straight part of the slot 3a is formed into an arc shape having a prescribed radius R. While the insulating cover 2b is peeled off by the slant 3b and the arc-shaped intersecting point 3c, the strands of the conductor 2a are compressed from both sides, re-arranged, and pushed into the slot 3a having a narrow slot width WS.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press contact terminal capable of stably press-connecting a conductor having a small wire diameter and a large number of wires.

[0002]

2. Description of the Related Art Conventionally, in order to press-connect a conductor of an electric wire, for example, an electric wire such as a wire harness for an automobile, a slot 1 having a predetermined slot width WS as shown in FIG.
The pressure contact terminal 1 provided with “a” has been put to practical use. At the opening of the slot 1a of the press contact terminal 1, an inclination 1b called a wire (electric wire) receiving angle a is formed. In such a press contact terminal, as shown in FIG. 3, the insulating coating 2b of the electric wire 2 is peeled off at the wire receiving angle a, and then the conductor 2a is compressed by inserting it into the slot 1a. Alternatively, an electrical connection is obtained by generating a contact load between the conductor 2a and the press contact terminal 1.

On the other hand, high flexibility is required for electric wires used for movable parts of devices that perform sliding, rotation, bending, and the like. To meet this requirement, a conductor having a small wire diameter and a large number of wires is required. (Hereinafter referred to as a flexible-structured conductor) is suitable. As the conductor having such a flexible configuration, for example, the nominal cross-sectional area and the number of strands are respectively 15 or more at 0.3 mm2, 19 or more at 0.5 mm2, and 0.
There are 30 or more with 75 square mm and 37 or more with 1.25 square mm.

[0004]

However, since the conductor having the flexible structure has a small element wire diameter, when the conductor is inserted into the slot, the slant 1b of the wire receiving angle a and the slot 1
A wire break occurs in a part of the wire at the edge b at the intersection with the straight line a, and the wire is not sufficiently compressed and the contact load between the wires or between the wire and the terminal does not increase. Another problem is that it is difficult to obtain a stable electrical connection.

The present invention has been made in order to solve the above-mentioned conventional problems, and has a structure of a press contact terminal which enables a flexible conductor to be inserted into a slot without causing a wire breakage. It is intended to provide.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a press-connecting terminal for press-connecting the above-mentioned conductor of an electric wire comprising a plurality of strands and an insulating coating of the conductor. A slot formed to have a predetermined slot width is provided, and an opening for guiding the electric wire is provided in an opening of the slot, and an intersection between the slope and a linear portion of the slot is formed in an arc shape. The present invention provides a press contact terminal characterized by the following.

According to the present invention, the intersection between the inclination of the opening of the slot and the straight portion is formed in an arc shape, so that there is no edge at the intersection of the inclination and the straight line. Even wires having a large number of conductors can be pressed into contact without breaking wires, and good electrical connection can be obtained. In addition, the arc-shaped intersection makes it possible to smoothly compress the element wires of the conductor from both sides and push them into the slots while rearranging them.

Preferably, the radius of the arc-shaped intersection is 0.3 mm or more and 1.5 mm or less.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, the same configuration and operation as those in the related art are denoted by the same reference numerals, and detailed description is omitted.

As shown in FIG. 1, an electric wire 2 includes a conductor 2a
And an insulating coating 2b of the conductor 2a.
Is a flexible configuration having a small wire diameter and a large number of wires.

The flexible conductor 2a has a nominal sectional area and the number of strands of 0.3 square m, respectively.
15 or more in m, 19 or more in 0.5 square mm, 0.7
More than 30 pieces at 5 mm2 and more than 37 pieces at 1.25 mm2 are currently used in actual work.

The press contact terminal 3 is provided with a slot 3a having a predetermined slot width WS in which the contact resistance of the wire of the conductor 2 is a stable region, and the opening of the slot 3a guides the electric wire 2. A slope 3b is formed.

The intersection 3c between the slope 3b and the straight portion of the slot 3a is not a conventional edge but a predetermined radius R
Are formed in an arc shape. The radius R of this arc-shaped intersection is
It is preferably 0.3 mm or more and 1.5 mm or less.

In the process of press-connecting the conductor 2a of the electric wire 2 to the press-connecting terminal 3, first, the wire of the conductor 2a is gradually compressed from both sides while the insulating coating 2b is peeled off by the slope 3b and the arc-shaped intersection 3c. So as to be pushed into the slot 3a having the narrow slot width WS as it is.

With the above setting, the wires of the conductor 2a can be pushed into the narrow slots 3a without breaking the wires. Also, the inclination 3b and the arc-shaped intersection 3
With c, the wire can be sufficiently compressed to the slot width WS where the contact resistance is a stable region.

In the press contact terminal 3, since the intersection 3c between the inclined portion 3b of the opening of the slot 3a and the straight portion is formed in an arc shape, the edge is eliminated at the intersection 3c between the inclined portion 3b and the straight line. The wire 2 having a small conductor size and a large number of wires can be press-contacted without breaking the wires, and good electrical connection can be obtained. Also, by the arc-shaped intersection 3c,
The operation of pushing the wire of the conductor 2a into the slot 3a while gradually compressing and rearranging the wires from both sides can be performed smoothly.

Table 1 shows that the size of the electric wire 2 is AVSS 0.5
sq (7 conductors / φ0.32), slot width WS
Is the result of an experimental example at 0.45 mm, and Table 2 shows that the size of the electric wire 2 is AVSSB 0.5f (20 conductors / φ
0.18), which is a result of an experimental example in which the slot width WS is 0.43 mm.

[0018]

[Table 1]

[0019]

[Table 2]

As is clear from the results shown in Tables 1 and 2, when the radius R of the arc-shaped intersection 3c is less than 0.3 mm, wire breakage is likely to occur regardless of the type. When the radius R of the arc-shaped intersection 3c exceeds 1.5 mm, stripping (cutting) of the insulating coating 2b was insufficient.

The radius R of the arc-shaped intersection 3c is 0.3 m
Which one to use in the range of m to 1.5 mm may be determined depending on the type of electric wire to be applied, and a suitable one may be selected.

[0022]

As is apparent from the above description, in the press contact terminal of the present invention, the intersection between the slope of the opening of the slot and the straight portion is formed in an arc shape, and therefore, the edge is formed at the intersection of the slope and the straight line. Therefore, even a wire having a conductor configuration having a small wire diameter and a large number of wires can be pressure-contacted without breaking the wires, and good electrical connection can be obtained. In addition, the arc-shaped intersection makes it possible to smoothly compress the element wires of the conductor from both sides and push them into the slots while rearranging them.

[Brief description of the drawings]

FIG. 1 is a front view of a press contact terminal of the present invention.

FIG. 2 is a perspective view of a conventional press contact terminal.

FIG. 3 is a front view of a conventional press contact terminal in which conductors having a flexible configuration are press-contacted.

[Explanation of symbols]

 2 Electric wire 2a Conductor 2b Insulation coating 3 Pressure contact terminal 3a Slot 3b Incline 3c Arc intersection WS slot width

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yasushi Saito 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (reference) 5E012 AA03

Claims (2)

[Claims] 1. A crimping terminal for crimping and connecting said conductor of an electric wire comprising a conductor composed of a plurality of strands and an insulating coating of said conductor, wherein a slot formed with a predetermined slot width is provided. A press contact terminal, characterized in that an inclined portion for guiding an electric wire is provided in an opening of the slot, and an intersection of the inclined portion and a linear portion of the slot is formed in an arc shape. 2. The crimp terminal according to claim 1, wherein a radius of the arc-shaped intersection is 0.3 mm or more and 1.5 mm or less.