JPH11312560A - Electrical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connector which is capable of high speed transmission, while making difficult for crosstalks to occur even with tuning fork type socket contact arranged at narrow intervals. SOLUTION: This connector 10 comprises an insulator 12 and socket contacts 14, each held against the insular 12 and comprising a connection 26 connected to a board at one end and two contact pieces 18 which are arranged parallel to each other and having a fixed part 24 almost at its center and fired to the insulator 12 and contact parts 22 at the other end, which make contact with a mating contact. A hole 20 is provided near the center of the fixed part 24 of each socket contact 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector for connecting two substrates used in an electronic device,
In particular, the present invention relates to a structure of a socket contact of an electrical connector.

[0002]

2. Description of the Related Art Referring to FIG.
Will be described. FIG. 3A shows a conventional electric connector 4.
FIG. 2B is a perspective view of the conventional socket contact 44. FIG. The electrical connector 40 is provided with a fitting opening 16 into which a mating contact is inserted, on the side opposite to the side where the connecting portion 26 of the socket contact 42 protrudes.

Conventionally, the electric connector 40 mainly includes an insulator 42 and a socket contact 44. The insulator 42 is an electrically insulating plastic and is manufactured by injection molding or the like of a known technique. The socket contact 44 is made of metal, and is manufactured by a known technique such as press working. The size of the socket contact 44 is 6 mm in length, 2 mm in width,
The thickness is 0.2 mm. This socket contact 44
Is a so-called tuning hawk type contact,
A contact part 22 that comes into contact with a mating contact as a component
It has three parts, namely, two contact pieces 18, a fixing part 24 fixed to the insulator 42, and a connecting part 26 connected to a substrate or the like. The two contact pieces 18 are arranged to face each other in parallel so as to sandwich the other contact.
Generally, the fixing portion 24 is provided with a protrusion for press-fitting into the insulator 42. . The socket contacts 44 are fixed to insertion holes of the insulator 42 arranged at a constant pitch by press fitting or the like. The relationship between the insertion hole and the socket contact 44 may be such that the socket contact 44 is inserted.
It is larger by about 0.05 to 0.2 mm.

[0004]

In recent years, with the miniaturization of electric equipment (electronic equipment), the demand for miniaturization of connectors has become even stronger. Therefore, the contact pitch of the connector has been narrowed. As the contact pitch becomes narrower, in the tuning fork-type socket contacts 44 as described above, the socket contacts 44 arranged at a constant pitch serve as electrodes and act like a capacitor. There is a problem to be solved such that high-speed transmission becomes difficult and high-speed transmission becomes impossible. That is, since the socket contact 44 serves as an electrode, the socket contact 44
The larger the area, the greater the crosstalk. When the contact pitch changes from 1 mm to 0.5 mm, crosstalk doubles. Further, when the size of the above-mentioned socket contact 44 is reduced to about 1/4, the crosstalk is reduced to 1/4.

The present invention has been made in view of the above-described problems, and provides an electrical connector 10 which is less likely to cause crosstalk even in a tuning fork-type socket contact arranged at a narrow pitch and capable of high-speed transmission. The purpose is to do.

[0006]

SUMMARY OF THE INVENTION The purpose of this invention is to provide an insulator 12
And a connecting portion 26 held and fixed to the insulator 12 and connected to the substrate at one end and the insulator 12 at a substantially central portion.
And a socket contact 14 comprising two contact pieces 18 arranged in parallel with a fixing portion 24 for fixing the contact portion 22 and a contact portion 22 on the other end contacting the mating contact. This can be achieved by providing the hole 20 near the center of the fixing portion 24 of the socket contact 14.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1A is a perspective view of an electrical connector 10 of the present invention, FIG. 1B is a perspective view of a socket contact 14 of the present invention, and FIG.
6 is a cross-sectional view of the electrical connector 10 taken along the center of FIG.
FIG. 2A is a perspective view of another socket contact 141 of the present invention, and FIG. 2B is a cross-sectional view of another electrical connector 101 taken along the center of the fitting portion 16. Electrical connector 1
A fitting opening 16 for mating with the mating connector is provided on the side 0. 101 on the side opposite to the side on which the connecting portion 26 of the socket contacts 14 141 protrudes.

In general, the electric connectors 10 and 101 are mainly composed of socket contacts 14 and 141 and an electrically insulating insulator 12. First, the electrical connector 10 will be described with reference to FIG. Although the size of the electric connector 10 varies in size, in this embodiment, the length is 25 mm,
The width is about 10 mm and the height is about 6 mm. The length varies depending on the contact pitch size and the number of cores. In this embodiment, the contact pitch is 0.5 mm and the number of cores is 30. A contact pitch of 0.3 to 1 mm or the like can be considered, and a number of cores of 10 to 120 cores or the like can be considered. In the present embodiment, the surface mounting (hereinafter referred to as SMT) is shown as the shape of the contact tail, but an L-type dip type or a straight dip type may be used.

First, the socket contact 14, which is a point of the present invention, will be described. The socket contact 14 is a plate-like piece, and a connecting part 26 connected to the substrate, a fixing part 24 fixed to the insulator 12 and a contact part 22 for contacting the mating contact of the mating connector (not shown) as in the related art. And a contact piece 18 having the following. This socket contact 14 is made of the insulator 1
The second insertion hole 28 is held and fixed so that the hole 20 of the fixing portion 24 faces the second insertion hole 28, and is manufactured by a known press working or the like. As a material of the socket contact 14, phosphor bronze or beryllium copper having a good spring property is used. Considering cost and workability, phosphor bronze is preferred.

The size of the socket contact 14 is as follows.
As before, the length is 6 mm, the width is 2 mm, and the thickness is 0.1 mm.
2 mm. As described in the above-described problem, since the crosstalk decreases as the size (area) of the socket contact 14 decreases, the hole 20 is provided in the fixing portion 24 of the socket contact 14. The size of the hole 20 is preferably as large as possible in order to reduce crosstalk, but is appropriately designed in consideration of the strength and workability of the socket contact 14. The shape of the hole 20 may be any shape as long as the crosstalk can be reduced as described above, and is appropriately designed in consideration of the strength and workability of the socket contact 14 as well as the size. In the present embodiment, the diameter is set to be about 0.6 × 0.6 mm in an elliptical shape. Other possible shapes include a circle, a square, and a triangle.

The components of the socket contact 14 will be described. First, the contact piece 18 having the contact portion 22 will be described. As in the prior art, two contact pieces 18 each having a contact portion 22 are arranged in parallel to face each other so as to sandwich a mating contact. A contact portion 22 is provided on a free end side of the contact piece 18, and a side opposite to the free end is connected to a fixed portion 24.

The interval between the two contact pieces 18 is appropriately designed in consideration of the contact pressure with the counterpart contact, the contact stability, the miniaturization of the connector, and the like. The contact portion 22 on the free end side of the contact piece 18 is a portion that comes into contact with a mating contact. The shape of the contact portion 22 may be any shape as long as the contact portion 22 can make contact with the counterpart contact. However, considering the insertion of the counterpart contact, the contact portion 22 is formed to project inwardly into a curved shape. By protruding into a curved shape, point contact is established with the mating contact, and stable contact can be obtained.
In addition, by projecting in a curved shape, it is easy to invite a partner contact.

Next, the fixing portion 24 will be described.
The fixing portion 24 is a portion that is held and fixed to the insulator 12. Both free ends thereof are fixed to the insulator 12 by protrusions for press-fitting into the insertion holes 28 of the insulator 12 and lances for hooking. Then the method is generally taken. Finally, the connection section 26 will be described. The connection portion 26 of the socket contact 14 is a portion connected to a substrate (not shown) or the like. In the present embodiment, the surface mounting (SMT) type is illustrated, but an L-type dip type or a straight dip type may be used. . The connecting portion 26 is a fixing portion 24
Projecting from the vicinity of the center, and have a substantially L-shape.

The insulator 12 is made of an electrically insulating plastic and is manufactured by a known molding technique. The socket contact 10 is held and fixed.
Examples of the material of the insulator 12 include polybutylene terephthalate (PBT) and polyamide (66PA / 46P).
A), polyethylene terephthalate (PET), liquid crystal polymer (LCP), polyphenylene sulfide (PP
S) and the like, and 46PA is preferable in consideration of cost and moldability. The insulator 12 has an insertion hole 28 into which the socket contact 14 is inserted. The insulator 12 is provided with a fitting port 16 into which a mating contact of a mating connector is inserted. The tip of the fitting port 16 is tapered to facilitate inviting a mating contact.

Next, another electric connector 1 will be described with reference to FIG.
01, only the differences from the electrical connector 10 of FIG. 1 will be described. Although the size of the electric connector 101 varies in size, in this embodiment, the length is 25 m.
m, width is about 10 mm, and height is about 6 mm. The length is
It changes depending on the contact pitch size and the number of cores. In this embodiment, the contact pitch is 0.5 mm and the number of cores is 30.
It is a wick. A contact pitch of 0.3 to 1 mm or the like can be considered, and a number of cores of 10 to 120 cores or the like can be considered.

First, the socket contact 141 which is a point of the present invention will be described. The socket contact 141, like the socket contact 14 of FIG. 1, is composed of three parts: a connection portion 26, a fixed portion 24, and a contact piece 18 having a contact portion 22 that comes into contact with a mating contact. The socket contact 141 is formed by punching a plate-like material into the shape of the socket contact 141.
Thereafter, the connecting portion 26 is bent into an L-shape. The socket contact 141 is provided on the insulator 12
The hole 20 of the fixing portion 24 is held and fixed to the insertion hole 28 in a vertical direction, and is manufactured by a known press working or the like. The material is the same as that of the socket contact 14 in FIG. The size of the socket contact 141 is 6 mm in length, 2 mm in width, and 0.2 mm in thickness. A hole 20 is provided in the fixing portion 24 of the socket contact 141 in order to reduce crosstalk similarly to the socket contact 14 of FIG. The size and shape of the hole 20 are the same as those of the socket contact 14 in FIG. The insulator 12 is the same as in FIG.

[0017]

The present invention has the following remarkable effects by the above-described structure. Since the holes 20 are provided in the fixing portions 24 of the tuning fork-type socket contacts 14 and 141 arranged at a small pitch, the area of the socket contacts 14 and 141 is reduced, so that the occurrence of crosstalk can be suppressed. -High-speed transmission is possible because crosstalk is unlikely to occur. Even if the socket contacts 14 and 141 are arranged at a narrow pitch of 0.5 mm or less, the occurrence of crosstalk can be reduced because the holes 20 are provided in the fixing portion 24. · Hole 2 in fixing portion 24 of socket contact 14
By providing 0, the area of the socket contacts 14 and 141 is reduced to 3/4, so that the occurrence of crosstalk can be reduced to 3/4 or less.

[Brief description of the drawings]

FIG. 1A is a perspective view of an electrical connector of the present invention. (B) It is a perspective view of the socket contact of the present invention. FIG. 3C is a cross-sectional view of the electric connector taken along a center of the fitting port.

FIG. 2A is a perspective view of another socket contact of the present invention. (B) It is sectional drawing of another electric connector cut | disconnected in the center of the fitting part.

FIG. 3A is a perspective view of a conventional electrical connector. (B) It is a perspective view of the conventional socket contact.

[Explanation of symbols]

 10, 101, 40 Electrical connector 12, 42 Insulator 14, 141, 44 Socket contact 16 Fitting port 18 Contact piece 20 Hole 22 Contact section 24 Fixed section 26 Connection section 28 Insertion hole

Claims (1)

[Claims] 1. An insulator, a connecting portion that is held and fixed to the insulator and connected to the substrate at one end, a fixed portion fixed to the insulator at substantially the center, and a mating contact at the other end. An electrical connector comprising: a socket contact formed of two parallel contact pieces having a contact portion; and a hole provided near a central portion of a fixing portion of the socket contact. connector.