JPH0597065U - Electrical contact and electrical connector using the same - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a miniaturized receptacle-type electrical contact that makes good electrical contact with a post contact, and an electrical connector that uses such a contact and that can be easily engaged with a mating connector. thing. [Structure] The electric contact 10 has a wire connection portion 11 and a contact portion 15 for contacting with a post contact 30. The contact portion 15 has a substantially 8-shaped cross section, the mating post contact 30 is inserted into the upper portion 17, and the insulating housing of the electrical connector 40 is provided in the lower portion 16.
A protrusion 60 protruding rearward from the fitting portion 43 of the contact receiving chamber 42 of 41 is inserted to maintain the posture of the electrical contact 40 constant.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to electrical contacts, particularly receptacle-type electrical contacts that mate with mating male (post) contacts and electrical connectors using such electrical contacts.

[0002]

[Prior Art]

 A pin header type connector with square posts to which a receptacle type connector in which one or more receptacle type contacts connected to wires are fixed in a receptacle housing is soldered to a through hole of a circuit board (or board). Wire-to-board electrical connectors that are used by mating with are widely used. A representative example of such an electrical connector is disclosed in, for example, Japanese Utility Model Publication No. 61-14472.

Each contact used in the receptacle-type connector of such a wire-to-board electrical connector has a wire barrel that is crimped (or crimped) to an exposed conductor at one end of an insulated stranded wire and an insulation adjacent to the wire barrel. The wire crimp connection with the insulation barrel crimped on the coating and the box-shaped female contact at the other end where the post contact is inserted are usually arranged in a straight line. It Such a connector is widely used as a connector for a power supply circuit that needs to flow a relatively large current of about several amperes.

[0004]

[Problems to be devised or solved]

 However, in the conventional receptacle type contact described above, the wire crimping connection portion and the contact portion of the mating post contact are arranged on the opposite sides of the electrical contact, and the mating post contact is inserted into the contact portion. However, they are placed far enough apart so that the mating contacts do not collide with the crimped wire end or the crimped wire barrel. As a result, the overall length of the receptacle-type contacts became relatively long, making it difficult to manufacture small electrical contacts.

Further, in such a conventional receptacle-type contact, the elasticity of the contact was not sufficient, and it was necessary to form a cantilever-shaped elastic contact piece inside the box-shaped portion. Furthermore, particularly in this type of connector having a relatively large number of contacts, the receptacle contacts were inclined and the contact members collided when the mating post contacts were inserted, making it difficult to perform a good insertion operation. In addition, there was a problem in that when the mating contact was fitted, a “twisting” action was exerted between both connectors, damaging or degrading the contact.

Accordingly, the present invention is to provide a new electrical contact that overcomes the drawbacks of the conventional receptacle type contacts described above. That is, it is an object of the present invention to provide a receptacle-type contact that can obtain good electrical characteristics with a relatively short and simple structure, and an electrical connector using such a contact.

[0007]

[Means and Actions for Solving Problems]

 In order to solve the above problems, according to the electric contact of the present invention, the contact portion at the opposite end of the electric wire connecting portion has a structure in which the cross section is divided into upper and lower parts in a substantially eight shape, and the mating post contact is inserted and contacted at the upper part. It is configured as follows. With this configuration, the inserted post contact effectively avoids the end of the wire crimped to the wire connection, thus shortening the overall length of the electrical contact and obtaining good electrical contact. ..

Also, according to the electric connector of the present invention, the electric contact as described above is inserted into the contact receiving opening of the insulating housing, and the protrusion of the insulating housing is inserted into the lower contact portion of the electric contact. Constitute. With this construction, the electrical contact is securely fixed in place in the contact receiving opening of the insulating housing and functions as a guide for the post contact to be inserted, and has a good "twisting resistance".

[0009]

【Example】

 Preferred embodiments of the electrical contact and the electrical connector using the same according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a preferred embodiment of an electric contact 10 according to the present invention. FIG. 1A is a perspective view of the electric contact 10 before connection to a wire, and FIG. A perspective view showing a state in which the wire 20 is crimp-connected to the electrical contact 10 of A) and is in contact with the post contact 30 is shown.

First, in FIG. 1A, the electric contact 10 is manufactured by a known method by punching and bending a plate-like body of an elastic copper alloy such as brass, phosphor bronze or beryllium copper. This electrical contact 10 is composed of a wire barrel 12 and an insulator barrel 13, and has an electric wire connecting portion 11 at one end for crimping (wiring) a wire, and a contact portion 15 for contacting with a post contact at the other end. .. As will be described later, the wire barrel 12 and the insulator barrel 13 of the wire connecting portion 11 are caulked with the exposed conductor and the insulating coating at the ends of the wire, respectively. Two ribs 14, for example, are formed on the bottom surface of the wire barrel 12 as needed to improve electrical contact.

Next, the contact portion 15 with the post contact has a constriction formed in the central portion thereof, and the cross section which is substantially divided into the lower portion 16 and the upper portion 17 is substantially 8 or a letter shape (hereinafter referred to as an 8 shape). ) Is a substantially box-shaped receptacle. A part of both side walls of the upper part 17 is pressed and deformed inward or cut and raised in a cantilever shape to form a contact protrusion 18. Further, a contact lance 19 is formed by cutting and raising a part of the bottom surface outward.

In order to form an electrical connector using the electrical contact 10 of FIG. 1 (A), a wire 20 is connected and a post contact 30 is attached to the upper portion 17 of the contact portion 15 as shown in FIG. 1 (B). Is inserted. The wire 20 is a conventional insulated stranded wire, with a wire or conductor 22 exposed from one end of the wire 20 and caulking the wire barrel 12 with a crimping hand tool or power tool. Furthermore, the insulator ball 13 is pressure-bonded onto the insulating coating 24 near the crimped end in a known manner.

As is apparent from FIG. 1B, the post contact 30 is, for example, a rod-shaped body having a substantially square cross section with a taper 31 formed at the tip. In this way, the post contact 30 is inserted into the upper part 17 of the contact part 15 which is divided into two parts, and the contact 30 is contacted between the contact protrusions 18 which are formed to project inward from both side surfaces. As a result, the tip end of the post contact 30 avoids the crimped end of the wire 20 during fitting, so that the total length of the electrical contact 10 can be shortened. Further, since the contact portion 15 is located away from the bottom surface, it can be understood that good elasticity can be achieved and good electrical contact can be made.

Next, an embodiment of the electrical connector 40 using a plurality of the electrical contacts 10 of FIG. 1 will be described with reference to FIGS. 2 and 3. FIG. 2 is a perspective view of an electrical connector 40 according to the present invention and a post header 50 which is used for mating with the electrical connector 40 before mating, and FIG. 3 is a sectional view of the electrical connector 40 and the post header 50 in a mated state. ..

The electrical connector 40 comprises an insulating housing 41, which in the illustrated embodiment is a molded plastic such as nylon having six contact receiving chambers 42. Each contact receiving chamber 42 is formed from the rear end (contact insertion end) toward the fitting end, and a post contact insertion opening 44 is formed on the fitting surface. Further, the fitting ends 43 are separated from each other by a slit 46. A locking leg 48 is formed in the center of the insulative housing 41, and two waterproof packings 47 surround each of the three electrical contact housings on both sides thereof. Further, as best shown in FIG. 3, engagement shoulders 49 are formed near the mating ends of each contact receiving chamber 42. When the electric contact 10 is inserted into the contact receiving chamber 42 from the rear end, the contact lance 19 on the bottom surface of the electric contact 10 engages with the engaging shoulder 49 to prevent the electric contact 10 from coming off in the direction opposite to the inserting direction. Further, an opening 45 is formed below the contact insertion opening 44 of each mating end portion 43, and if necessary, a tool such as a screwdriver is used to push up the contact lance 19 to remove the electric contact 10 once inserted. It can be pulled out from the insulating housing 41 of the electrical connector 40.

Like the electrical connector 40, the pin header 50 fitted and used with the electrical connector 40 has six post contacts 52 embedded in an insulating housing 51 which is a molded product of a plastic material such as nylon. .. Each post contact 52 is made of, for example, tin-plated brass, which has a substantially square cross section, like the contact 30 described above. At the mating end of the insulating housing 51, the contact portions of the post contacts 52 which are inserted into the contact portions 15 of the electrical contacts 10 of the electrical connector 40 and the locking legs 48 are engaged to engage the insulating housings 41, An elastic engaging member 53 for holding the fitted state of 51 is provided.

It should be noted here that, as is apparent from FIG. 3, a protrusion 60 protruding inward is formed between the openings 44 and 45 of the fitting end portion 43 of the electric connector 40. Is to be inserted into the lower portion 16 of the contact portion 15 of the electric contact 10. Therefore, when each electrical contact 10 is pushed into the contact receiving chamber 42 of the insulating housing 41 of the electrical connector 40, the protrusion 60 of the insulating housing 41 is inserted into the lower portion 16 of the connecting portion 15 of the electrical contact 10. The contact lance 19 is held by being engaged with the engagement shoulder 49. As a result, the posture of the electrical contact 10 becomes constant, and the fitting operation of the post header 50 with each post contact 52 becomes smooth. In addition, the protrusion 60 also acts as a guide for the post contact 52, so that the “twisting” resistance is improved.

Although the electrical contact of the present invention and the electrical connector using the same have been described above with reference to the preferred embodiments, the present invention is not limited to such embodiments and various electrical contacts may be used according to the application. It will be understood that modifications and changes can be made.

[0020]

[Effect of the device]

 As can be understood from the above description, according to the electrical contact of the present invention, the contact portion with the post contact is formed in a substantially 8-shaped cross section, and the post contact is inserted in the upper portion, so that the total length of the electrical contact is shortened. As a result, the contact portion is separated from the base portion, so that it has large elasticity and good electrical contact can be realized.

Further, according to the electric connector of the present invention, the protrusion of the insulating housing is inserted in the lower part of the contact portion in addition to the use of the electric contact described above, so that the posture of the electric contact is reliably determined and inserted. Smoothly guide other post contacts. Furthermore, even if there is a twisting motion at the time of fitting, it is possible to protect the contact by reducing it.

[Brief description of drawings]

FIG. 1 is a perspective view of a preferred embodiment of an electrical contact according to the present invention.

2 is a perspective view of a preferred embodiment of an electrical connector according to the present invention using the electrical contacts of FIG. 1 and a mating connector. FIG.

FIG. 3 is a perspective view showing a fitted state of both connectors of FIG.

[Explanation of symbols]

 10 Electrical contact 11 Wire connection part 15 Contact part 16 Lower part 17 Upper part 40 Electrical connector 42 Contact receiving chamber 30, 52 Post contact 60 Protrusion

Claims (2)

[Scope of utility model registration request] 1. A receptacle-type electrical contact having an electric wire connecting portion at one end and a contact portion with a male contact at the other end, wherein the contact portion has a constriction in a substantially central portion, and has a substantially 8-shaped shape as a whole. An electrical contact, characterized in that it is divided into a lower part and an upper part, and the male contact is inserted into the upper part. 2. A receptacle-type electric contact in which electric contacts are inserted and held in a plurality of contact receiving openings, wherein the electric contact has a wire connecting portion at one end and a central portion at the other end, and has a substantially 8-shaped cross section. And a protrusion which is inserted into a lower portion of the contact portion of the electric contact, is formed on the fitting surface side of the housing. Electrical connector.