JPS608374Y2 - electrical contacts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical contact, and particularly to a contact suitable for use in a printed circuit board connector or the like.

Conventionally, as schematically shown in FIG. 1, a printed circuit board connector 20 has been used to make an electrical connection with a circuit conductor of a printed circuit board 10.

The details of this conventional printed circuit board connector 20 are illustrated in FIG.

This connector 20 consists of a female housing 22 in which a plurality of female contacts 21 are arranged, and a male housing 24 in which a plurality of cone-shaped contacts 23 are arranged.

The male housing 24 is arranged on the printed circuit board 10 to be connected, and in this case, the connection part 23A of each conical contact 23 is
Dip soldering or the like is electrically connected to the corresponding circuit conductor of the printed circuit board 10 by penetrating the corresponding through hole of the printed circuit board 10 as indicated by reference numeral 11.

On the other hand, the female housing 22 has a structure that allows it to fit into the male housing 24, and normally the female housing 22 has a female contact arrangement opening 22.
The shapes of the female contacts 21 respectively disposed at A are as shown in the figure.

This conventional female contact 21 is usually of a crimping type formed by punching and bending a single piece of conductive sheet with spring properties.

The structure of this conventional female contact 21 includes a female contact portion 21A, a core crimping portion 21B, and a covering crimping portion 21C.
and are arranged in this order in the contact insertion direction.

Furthermore, this female contact 21 usually has a locking portion 21D for fixing it within the array opening 22A.

In each female contactor 21, the peeled core wire portion 31 is crimped and connected to the core wire crimping portion 21B, and the covering portion 32 is connected to the covering crimping portion 21B.
A connecting wire 30 is connected to C by crimp connection.

By fitting the female housing 22 wired in this way into the male housing 24 installed on the printed circuit board 10 to form the state shown in FIG. It is inserted between the contact portions 21A of the child 21 and electrically connected thereto.

In this way, electrical connection with the circuit conductor of the printed circuit board 10 can be established.

However, in such a conventional connector, the female contact 21 has a structure in which the contact portion 21A, the core wire crimping portion 21B, and the covering crimping portion 21G are arranged in a straight line in the contact insertion direction. There was a limit to shortening the overall length of the contactor.

Therefore, the height of the housing that accommodates these contacts, that is, the dimension H from the top surface of the printed circuit board 10 to the end surface of the connector 20 in FIG. 1, has to be a certain height.

However, recently, as sets have become smaller and more dense, there has been a trend to reduce the spacing between printed circuit boards.Therefore, the height of the connectors used for these has also been reduced as much as possible, and the contact areas of the contacts have been reduced. There is a growing demand for a connector that does not require deterioration in workability of the crimping part.

In addition, in the structure of conventional contacts, the contact part, the core wire crimping part, and the insulation crimping part are in a straight line, so if a too thick wire is connected to the crimping part, the other wire that is inserted into the contact part There was a risk of the tips of the contacts colliding with each other, and there were restrictions on the diameter of the wires that could be connected.

In view of the problems of the prior art described above, the purpose of the present invention is to provide a contact that minimizes the length in the contact insertion direction, does not limit the wire diameter that can be connected, and has good workability during connection. It is to provide.

According to the present invention, the length of the contact in the contact insertion direction can be shortened by arranging the contact part on the opposite side between the core wire crimping part and the covering crimping part. It is possible to connect electric wires with a considerably large diameter, and it is also possible to make a contact with good workability in connection.

Next, the present invention will be described in detail with regard to embodiments of the present invention based on FIGS. 3 to 9 of the accompanying drawings.

FIG. 3 shows a female contactor as an embodiment of the present invention in a perspective view.

This female contact 40 can be formed by punching and bending a single piece of conductive sheet with spring properties, as in the conventional case, but the female contact 40 can be formed by punching and bending a single conductive sheet with spring properties. It has a structure in which a female contact portion 43 is arranged on the opposite side.

A locking part 44 is provided at the tip of the core wire crimping part 41, and two punches are provided on the inner surface of the core wire crimping part 41 to ensure good electrical and mechanical contact with the core wire. A line 41A is formed.

The state in which the electric wire 30 is connected to this female contact 40 is shown in the fourth section.
It is shown in a perspective view in the figure.

As is clear from FIG. 4, this connection is made by crimping the core wire 31 of the peeled electric wire 30 to the core wire crimping portion 41, and
2 to the cover crimping portion 42.

FIG. 5 is a perspective view showing an example of a female housing of a printed circuit board connector in which the contacts 40 connected as shown in FIG. 4 are disposed.

The female housing 50 is preferably integrally molded with an elastic insulating material, and mainly includes a plurality of female contact housing chambers 51, etc., and protrusions 52 projecting into the interior of each housing chamber 51.
A deflection locking arm 52 having a tip A, a recess 53 that receives and fits the mating male housing, and this recess 5.
It has a plurality of cone-shaped contact receiving openings 54 which are open at 3 and receive each of the mating cone-shaped contacts.

FIG. 6 shows a partially broken state in order to explain the state in which the female contactor wired as shown in FIG. 4 is disposed in the female housing 50 of FIG. 5.

As clearly shown in FIG. 6, when the female contact 40 is inserted into the receiving chamber 51 of the female housing 50, the locking portion 44 at the tip of the contact 40 is attached to the deflection locking arm 52. As the contactor 40 is inserted into the protrusion 52A at the tip, the deflection locking arm 52 is deflected outward due to its elasticity.

Furthermore, when the contactor 40 is inserted, the locking portion 44 engages with the protrusion 52.
At this time, the deflection locking arm 52 returns to its original position due to its elasticity.

Therefore, as shown in FIG.
is engaged with the distal end surface of the deflection locking arm 52 to fix the contactor 40 within the accommodation chamber 51 and prevent it from coming out.

At this time, the female contact portion of the female contact 40 is aligned with the conical contact receiving opening 54 of the female housing 50.

FIG. 7 is a sectional view showing a state in which the female housing 50 is fitted into the mating male housing 60 arranged on the printed circuit board 10.

The male housing 60 is received within the recess 53 of the female housing 50 and the conical contact 61 is inserted into the female housing 50.
The female contact portion 43 of the female contact 40 is electrically contacted through the conical contact receiving opening 54 of the female contact 40 .

Since the contactor of the present invention has the structure as described above, the following effects can be obtained.

(1) Since the contact part is arranged between the core wire crimping part and the coating crimping part, and on the opposite side, the distance between each part can be reduced to the minimum, and therefore, the entire contact in the direction of contact insertion is The length of can be made shorter than before.

Therefore, the height of the connector housing that accommodates them can also be reduced, making it possible to accommodate high-density packaging.

(2) Since the distance between the core wire crimping part and the insulation crimping part can be made wider than before, the core part of the wire can be crimped on the insulation crimping part side during crimping work, and the insulation part cannot be crimped on the core wire crimping part side. There is less risk of crimping, and the number of crimping defects is greatly reduced compared to conventional products.

(3) A locking part can be placed at the tip of the contact, and this locking part prevents the core wire from jumping out more than necessary when the wire is crimped with the core wire crimping part. This locking portion can also act as a positioning member during crimping work.

(4) Since the contact part is located on the opposite side from the wire crimping part and the covering crimping part, the wire crimping part and the covering crimping part are independent of the direction in which the mating contact contacts the contact part. , even wires with a considerably large diameter can be connected.

(5) Since the contact part is provided on the opposite side between the core wire crimping part and the coating crimping part, a recess is provided in the housing that accommodates this contact, and the mating housing is fitted into this recess. It is possible to create a connector structure in which the connectors are connected together, and in this way the height of the entire connector can be designed to be even lower, making it easier to accommodate high-density mounting.

(6) Since the locking part can be placed at the tip of the contact, by providing the housing with a deflection locking arm that cooperates with this locking part, the locking part does not have much springiness. In both cases, the soft elasticity of the deflection locking arm portion can be used to obtain good attaching/detaching properties of the contactor.

The present invention is not limited to the shape of the contact shown in Fig. 3, but various modifications are possible.
A few of these modifications will be briefly explained with reference to FIGS. 8 and 9.

FIG. 8 shows an example of a female contact according to the present invention which is suitable for contacting a flat female contact. A female contact portion 73 is formed between the core wire crimping portion 71 and the covering crimping portion 72 on the opposite side thereof.
A locking portion 74 is provided at the tip of the core wire crimping portion 71.

The mating female contact 75 is connected to the female contact portion 73 in the direction of the arrow.
It is designed to be inserted between the two to make contact.

FIG. 9 shows an example of a female contact according to the present invention which is suitable for contacting a flat female contact, and this female contact 90 is also made of a piece of conductive material with spring properties. A female contact portion 93 is formed between the core wire crimping portion 91 and the covering crimping portion 92 on the opposite side thereof.
A locking portion 94 is provided at the tip of the core wire crimping portion 91.

The mating female contact 95 is connected to the female contact portion 93 in the direction of the arrow.
This contactor 90 is designed to be inserted into the upper
is particularly suitable for obtaining electrical contact by sandwiching the female contact 95 between the wall surface of the housing in which the contact 9o is disposed and the female contact portion 93.

[Brief explanation of the drawing]

Fig. 1 of the accompanying drawings is a schematic diagram showing an example of the use of a conventional printed circuit board connector, Fig. 2 is a partially cutaway perspective view showing the printed circuit board connector of Fig. 1 in detail, and Fig. 3 is a diagram showing an example of the use of a conventional printed circuit board connector. A perspective view showing an embodiment of the contact, FIG. 4 is a perspective view showing a state in which electric wires are connected to the contact shown in FIG. 3, and FIG. 5 is a printed circuit board connector in which the contact shown in FIG. 3 is installed. FIG. 6 is a partially cutaway perspective view showing how the female contact wired as shown in FIG. 4 is installed in the female housing of FIG. 5, and FIG. 6 is a cross-sectional view showing a state in which the male housing of FIG. 6 is coupled to a male housing installed on a printed circuit board, and FIGS. 8 and 9 are perspective views showing various modifications of the contactor of the present invention, respectively. . 40... Female contact, 41... Core wire crimping part, 42... Covering crimping part, 43...
Female contact portion, 44...Locking portion.

Claims (3)

[Scope of utility model registration request] (1) An electrical contact characterized in that a contact portion is disposed between the core wire crimping portion and the covering crimping portion on the opposite side thereof. (2) The electrical contact according to claim 1, wherein the contact portion is a female contact portion. (3) A locking portion is formed in front of the core wire crimping portion.
Electrical contacts listed in ).