JPH0348628B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a contact used for electrical connection of electric wires.

[Conventional technology]

In recent years, a press-contact connection method has been widely used in order to reduce the cost and save labor in the process of connecting electric wires and contacts. In this case, a flat ribbon cable, discrete wire, or the like is used as the electric wire to which the contacts are connected.

Conventionally, there are pin-type contacts 1 as shown in FIGS. 4 and 5. That contact 1
As shown in FIG. 6, the contact portion 3 is made by bending a press-cut plate and has a substantially cylindrical contact portion 3.

A crimp barrel 5 is formed at the rear of the contact 1 to hold an electric wire (not shown) therein.

A pressure contact portion 7 is formed in the middle portion of the contact 1 . The pressure contact portion 7 includes two core wire pressure contact pieces 9 cut and raised from the bottom surface of the substantially U-shaped cross section of the contact 1.
have.

Side walls 11 are formed on both sides of the pressure contact portion 7 . A cut is made between the side wall 11 of the pressure contact portion 7 and the pair of side walls 13 of the pressure bonding barrel 5. Further, the crimp barrel 5 and the crimp portion 7 are continuous on the bottom surface of the contact 1.

Thus, the contact 1 has its crimp barrel 5
It is possible to hold the electric wire so as to embrace it, and to press the core wire of the electric wire into the pressure contact groove 15 of the core wire pressure contact piece 9.

[Problem that the invention seeks to solve]

However, according to such a contact 1, when two core wire pressure welding pieces 9 are formed in order to ensure reliability, the dimension l of the core wire pressure welding piece 9 becomes 2l, which occupies a large proportion of the total length of the contact 1. I end up.

As a result, there is a problem that miniaturization of the contact 1 is hindered.

Therefore, an object of the present invention is to provide a compact contact by shortening the total length of the contact.

[Means for solving problems]

According to the present invention, a contact portion for connecting to a mating contact, a pressure contact portion for pressure contacting a core wire of an electric wire,
In the contact including the coated barrel that holds the electric wire, a first flat plate portion 29-1 parallel to one axis.
and second and third flat plate parts 29-2 and 29-3 bent from mutually opposite ends of the first flat plate part to the same side at mutually different positions in the direction along the one axis.
The press-contact portion includes a pair of plates that extend toward each other from the second and third flat plate portions, are bent in the same direction so as to intersect the one axis, and are opposed to each other in the direction of the one axis. There is obtained a contact characterized in that the plate part is provided with a press-contact groove for inserting the core wire of the electric wire.

〔Example〕

1 and 2 show a contact according to one embodiment of the invention.

In the illustrated contact 21, a pin-type contact portion 23 having a substantially cylindrical shape is formed by bending a press-cut conductive plate material. A mating contact (not shown) is removably fitted into the contact portion 23 .

Two press-contact parts 25 and a covering barrel 27 are formed behind the contact part 23. The pressure contact portion 25 and the covering barrel 27 are connected to each other by a first flat plate portion 29-1, a second flat plate portion 29-2, and a third flat plate portion 29-3. Furthermore, when the contact is blank, the two press-contact parts 25 are arranged parallel to each other. These press-contact parts 25 are bent and positioned on the same line. One pressure contact part 25
, the lance 3 extends upward from the contact portion 23.
1 is formed.

The pressure contact portion 25 is connected to the second and third flat plate portions 29-
It has a pair of plate portions that extend toward each other from 2 and 29-3, are bent in the same direction so as to intersect with one axis, and are opposed to each other in the direction of one axis. This plate portion is provided with a press-contact groove 35 for inserting the core wire of the electric wire.

Next, the bending process will be explained. First, the folding curve
The pressure contact portion 25 is bent upward along l ₁ and l ₂ at right angles to the plane of the paper. Next, both side portions of the first flat plate portion 29-1 are bent upward at right angles along folding lines _l3 to _l5 . Furthermore, the holding piece 42 is bent at right angles along the folding lines l ₆ and l ₇ to form the covering barrel 27.
form. Besides, complete the work by slightly bending along the folding line _L8 ~ _L10 . Note that in the resulting product, the two press-contact parts face each other with a narrow spacing. Note that the bending procedure is not limited to the above.

Covered barrel 2 at the rear of the resulting contact 21
7 has two side walls 40 bent from the flat plate part 29-3. A holding piece 42 for holding and holding the electric wire is formed at the upper part of the side wall 40.

Such a contact 21 is incorporated inside an insulator 45, as shown in FIG. At that time, the flat plate portion 29-1 of the contact 21
is held in the groove 48 of the insulator 45. Since the insulator 45 is formed with a hole 50 into which the lance 31 is hooked when the contact 21 is assembled, the insulator 45
The contact 21 is stably mounted inside the contact 5.

As can be seen from the above, in the blank state, the two pressure contact parts 25 are located on lines parallel to each other.
are located on the same line due to the bending process. That is, the pressure contact portion 25 and the covering barrel 27 are located in the longitudinal direction of the contact 21 and connected to the electric wire.

Note that 51, 52, and 53 indicate engaging portions that engage with the insulator 45 in order to position the contact 21 within the insulator 45.

〔Effect of the invention〕

As described above using the embodiments, according to the contact of the present invention, the pressure contact portions of the blank contact are positioned parallel to each other, so that the total length of the contact can be shortened. As a result, the size of the contact in the product state can be reduced.

[Brief explanation of drawings]

1 is a perspective view showing a contact according to an embodiment of the present invention, FIG. 2 is a developed view of the contact shown in FIG. 1, FIG. 3 is a perspective sectional view of the contact assembled into an insulator, and FIG. 4 is a perspective view of a conventional contact, FIG. 5 is a side view of the contact of FIG. 4, and FIG. 6 is an exploded view of the contact. 1: Contact, 3: Contact portion, 5: Crimp barrel, 7: Pressure contact portion, 21: Contact, 23: Contact portion, 25: Pressure contact portion, 27: Covering barrel, 29: Flat plate portion, 35: Pressure contact groove, 42: Holding piece, 45: insulator, 50: hole.

Claims (1)

[Claims] 1 A contact part for connecting to a mating contact,
In a contact that includes a pressure welding part that presses the core wire of an electric wire and a covering barrel that holds the electric wire, a first flat plate part 29-1 parallel to one axis and a first flat plate part 29-1 at different positions in the direction along the one axis are provided. second and third flat plate parts 29-2 and 29-3 bent toward the same side from mutually opposite ends of the first flat plate part; It has a pair of plate parts that extend toward each other and are bent in the same direction so as to intersect with the one axis, and are opposed to each other in the direction of the one axis, into which the core wire of the electric wire is inserted. A contact characterized by having a press-contact groove.