JP2921489B2 - High-speed transmission connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for electrically connecting printed circuit boards to each other.
The present invention relates to a high-speed transmission connector that needs to pass a high-frequency signal.

[0002]

2. Description of the Related Art A conventional high frequency connector will be described with reference to FIG.

As shown in FIG. 9, this connector comprises a male connector 101 and a female connector 102.

A plurality of signal terminals 104a and a plurality of ground terminals 103a each made of metal are fixed to the male connector 101 in a staggered pattern. The signal terminal 104a has a pin shape like a normal connector, and the ground terminal 103a has a flat plate shape for improving high frequency characteristics.

The female connector 102 is a male connector 10
1 corresponding to the positions of the signal terminal 104a and the ground terminal 103a.
There are provided holes into which a is inserted, and a signal terminal 104b and a ground terminal 103b made of metal, respectively, are fixed in these holes. That is, the female connector 10
Also in 2, the plurality of signal terminals 104b and the plurality of ground terminals 103b are arranged in a staggered pattern.

The signal terminal 104b of the female connector 102
Has a shape that sandwiches the signal terminal 103a of the male connector 101 like a normal connector. On the other hand, the ground terminal 103b of the female connector 102 has a flat plate shape like the ground terminal 103a of the male connector 101, but is fixed at a position orthogonal to the ground terminal 103a of the male connector 101. Further, a notch 107 is provided at the distal end of the ground terminal 103b of the female connector 102 to be fitted with the ground terminal 103a of the male connector 101.

When the male connector 101 and the female connector 102 are fitted with each other based on the above configuration, the male connector 1
01 is interposed between the signal terminals 104b of the female connector 102, and the ground terminal 103a of the male connector 101 is connected to the ground terminal 1 of the female connector 102.
The male connector 101 and the female connector 102 are electrically connected to each other by being fitted into the notch 107b of the connector 03b. In this state, the ground terminal 103a of the male connector 101 and the ground terminal 103 of the female connector 102
b, and the terminals are arranged in a zigzag pattern, so that the ground terminals 103a, 103
3b forms an array surrounding the signal terminals 104a and 104b. As a result, a pseudo coaxial configuration can be taken,
High frequency characteristics are improved.

[0008]

However, in the conventional connector described above, a cross-shaped ground terminal is formed by fitting the ground terminal of the male connector and the ground terminal of the female connector, and the pseudo terminal surrounding the signal terminal is formed. Because of the coaxial configuration, pseudo coaxial could not be configured in portions other than the fitting portion of the ground terminal. As a result, crosstalk may occur between adjacent signal terminals, and the high-frequency characteristics may not be improved as expected.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a high-speed transmission connector in which a pseudo coaxial can be formed in all portions inside the connector, and the high-frequency characteristics are further improved.

[0010]

In order to achieve the above object, a high-speed transmission connector according to the present invention is a high-speed transmission connector in which a plurality of signal terminals and a plurality of ground terminals are arranged in a staggered pattern. The ground terminal extends between adjacent signal terminals , and the leading end of the extended portion is
It is characterized in that it overlaps when viewed from the signal terminal and surrounds one signal terminal with its surrounding four ground terminals.

According to the above configuration, the ground terminals extend between the adjacent signal terminals, and one signal terminal is surrounded by the four ground terminals. Be composed. As a result, the occurrence of crosstalk is more effectively suppressed, and the high-frequency characteristics are improved.

In addition, the tip of the extended portion of the ground terminal
Since the end portion is overlapped Tsu if viewed from the signal terminal, more reliable pseudo coaxial constructed.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 is a partially cutaway perspective view of a male connector of a first embodiment of a high-speed transmission connector of the present invention, and FIG. 2 is a high-speed transmission connector of the present invention. FIG. 2 is a perspective view in which a part of the female connector of the first embodiment of the transmission connector is broken.

The high-speed transmission connector of the present embodiment comprises a male connector 1 and a female connector 2 as shown in FIGS.

First, the male connector 1 will be described.
The male connector 1 has a plurality of male ground terminals 3a having a cross-shaped cross section and a plurality of pin-shaped male signal terminals 4a. The male ground terminal 3a and the male signal terminal 4a are provided.
Is supported and fixed to the male housing 5a. Yugawagu <br/> run mode pin 3a and the male signal terminals 4a are arranged in a staggered pattern with each other, so the arrangement of four male ground terminal 3a surrounds around any male signal terminals 4a I have. In the outermost row of the arrangement of the male-side ground terminals 3a and the male-side signal terminals 4a, the male-side ground terminals 3a are arranged.

At the tip of the male ground terminal 3a inside the male housing 5a, as shown in the enlarged view of FIG. Is provided. The male ground terminal 3a outside the male housing 5a.
Are formed integrally with each other at a tip end thereof, and this portion is electrically connected to a ground line of a printed circuit board (not shown) on which the male connector 1 is mounted. This is the part 9a. Further, as shown in the cross-sectional view of FIG. 5, each male ground terminal 3a is provided with a male ground terminal through hole 8 along its center line.

The male housing 5a and the male ground terminal 3a are integrally formed by a two-shot method using MID (Molded Interconnection Device). The male-side ground terminal 3a is a member to which MID plating can be applied (hereinafter referred to as “plating grade”).
The male side housing 5a is formed of a member without MID plating (hereinafter, referred to as “general member”).

The two-shot method is a method using an insert.
This is a method of integrally molding two different resins in the manner of color molding. In other words, the portion corresponding to the pattern of the two-color molding is defined as the male ground terminal 3a, and the portion to be the male ground terminal 3a is molded in the primary molding stage. After the completion of the primary molding, a plating process is performed to deposit a metal film on the surface of the male-side ground terminal 3a molded in plating grade. Thereafter, the male housing 5a is formed by secondary molding, and the male housing 5a is formed.
And the male-side ground terminal 3a.

At this time, the male side ground terminal 3a is divided into the inside and the outside by the male side housing 5a formed of a general member. However, the male side ground terminal 3a is formed before the formation of the male side housing 5a. Since the surface is plated, the male ground terminal 3a is connected to the male housing 5a.
The inside and outside are electrically connected without any problem. In addition, the male ground terminals 3a are electrically independent of each other.

By integrally molding the male housing 5a and the male ground terminal 3a with resin as described above, the structure of the male connector 1 can be simplified and the number of parts can be reduced.

The male signal terminal 4a of the male connector 1 is formed by pressing a metal plate in the same manner as a general connector. As shown in the sectional view of FIG. It is press-fitted into the signal terminal hole 5a and is fixed to the male housing 5a with its tip protruding inside the male housing 5a. The distal end of the male signal terminal 4a outside the male housing 5a is electrically connected to the signal line of the printed circuit board.

Next, the female connector 2 will be described.
As shown in FIG. 2, the female connector 2 has a female housing 5b provided with a plurality of female ground terminal holes 3b and a plurality of female signal terminal holes 6b. The male-side ground terminal 3a and the male-side signal terminal 4a are inserted into the male-side ground terminal 3a and the male-side signal terminal 4a of the male-side connector 1, respectively. Are arranged in a staggered pattern corresponding to each other.

As shown in FIG. 5, on the outer side of the female side housing 5b, a female side connecting portion 9b provided with a through hole communicating between the inner side and the outer side of the female side housing 5b is connected to each female side ground. It is provided coaxially with the terminal hole 3b and integrally with the female housing 5b. These female-side connection portions 9b are formed on a printed circuit board (not shown) on which the female-side connector 2 is mounted.
Is electrically connected to the ground line.

The female connector 2 is formed by a two-shot method using MID similarly to the male connector 1. First, a tube having a cross-shaped cross section whose inside is a female ground terminal hole 3a and a corresponding female side connection portion 9b are formed by plating grade. Thereafter, the female housing 5b is formed around the cylinder by secondary molding using a general member, and an integrated structure of the cylinder, the female connection portion 9b, and the female housing 5b is obtained. After the completion of the secondary molding, plating is performed so that plating is performed only on the inner side (female ground terminal hole 3b) and the female connection portion 9b of the cylinder, which is a part molded in plating grade, and the female ground terminal hole is formed. 3b and the female connection 9
The inside and outside of b are brought into conduction. Thus, the female ground terminal hole 3b functions as a ground terminal of the female connector 2, so that the structure of the female connector 2 can be simplified and the number of components can be reduced.

As shown in FIG. 4, in the female signal terminal hole 6b, similarly to a general connector, a female signal terminal having a structure formed by pressing a metal plate or the like and sandwiching the male signal terminal 4a is provided. 4b is press-fitted and fixed. An end of the female signal terminal 4b opposite to the portion sandwiching the male signal terminal 4a protrudes outside the female housing 5b,
This portion is electrically connected to the signal line of the printed circuit board on which the female connector 2 is mounted.

When the male connector 1 and the female connector 2 are fitted together based on the above configuration, the male signal terminal 4a is sandwiched between the female signal terminals 4b as shown in FIG. As described above, the contact projection 7 of the male ground terminal 3a contacts the inner surface of the female ground terminal hole 3b,
Thereby, the printed circuit board on which the male connector 1 is mounted and the printed circuit board on which the female connector 2 is mounted are electrically connected.

In this state, between the two printed circuit boards connected by the male connector 1 and the female connector 2, FIG.
As shown in FIG.
The signal terminals 4 and the ground terminals 3 are arranged so as to be surrounded by one ground terminal 3. Moreover, the signal terminal 4
Since the convex portion of the cross-shaped ground terminal 3 extends between the signal terminal 4 and the adjacent signal terminal 4, the portion serves as a shield for the signal terminal 4. That is, the male connector 1
Pseudo coaxial is formed in all the portions inside and inside the female connector 2. Therefore, the occurrence of crosstalk is more effectively suppressed, and the high-frequency characteristics are improved. In particular, in this example, since the ground terminals 3 are located in the outermost row of the arrangement of the ground terminals 3 and the signal terminals 4, a pseudo coaxial structure is formed for all the signal terminals 4.

Since the impedance can be matched by appropriately setting the thickness of the signal terminal 4 and the distance from the signal terminal 4 to the ground terminal 3, reflection of the transmission signal can be achieved by making the transmission line and the impedance the same. Can also be suppressed. Furthermore, since the ground terminals 3 are independent of each other, if the number of the signal terminals 4 is insufficient, the ground terminals 3 can be used as signal terminals. However, when the ground terminal 3 is used as a signal terminal, a pseudo coaxial is not formed in that portion, and the transmission characteristics are degraded.

(Second Embodiment) FIG. 7 is a diagram showing an arrangement of ground terminals and signal terminals in a high-speed transmission connector according to a second embodiment of the present invention.

In this example, the cross-sectional shape of the ground terminal 13 is different from that of the first embodiment. Other configurations are the same as those of the first embodiment, and a description thereof will be omitted. In the ground terminal 13, a part of a tip of a portion extending in a cross shape is further extended. These extended portions overlap each other when viewed from the signal terminal 14. As a result, the entire periphery of the signal terminal 14 is completely surrounded by the four ground terminals 13, and the shielding property of the ground terminal 13 is improved as compared with the first embodiment. As a result, crosstalk is less likely to occur, and the high-frequency characteristics are further improved. The position and shape of the extending portion of the ground terminal 13 are such that the adjacent ground terminals 13
The position and shape shown in FIG. 7 are not limited as long as they overlap each other when viewed from above.

(Third Embodiment) In the two examples described above, the cross-sectional shape of the ground terminal is described as an example. However, the shape of the ground terminal is such that the ground terminal exists between adjacent signal terminals. The shape is not limited to this as long as the shape is as follows.

FIG. 13 is a diagram showing an arrangement of ground terminals and signal terminals in a third embodiment of the high-speed transmission connector of the present invention.

In this embodiment, the cross-sectional shape of the ground terminal 23 is L-shaped. Other configurations are the same as those of the first embodiment, and a description thereof will be omitted. Thus, the ground terminal 2
Even if the cross-sectional shape of 3 is L-shaped, a pseudo coaxial structure in which an arbitrary signal terminal 24 is surrounded by four ground terminals 23 can be configured, and the occurrence of crosstalk can be suppressed as in the first embodiment. . Further, in this example, the structure of the ground terminal 23 is simpler than in the case of a cross shape. As a result, the intervals between the ground terminals 23 and the signal terminals 24 can be reduced, and a connector having the ground terminals 23 and the signal terminals 24 arranged at a higher density can be designed.

[0035]

As described above, according to the present invention, the shape of the ground terminal can be extended between adjacent signal terminals and extended.
That the tip of the existing part overlaps when viewed from the signal terminal
Accordingly, by forming a shape in which one signal terminal is surrounded by four ground terminals, a pseudo coaxial can be surely formed in all portions inside the connector. As a result, the occurrence of crosstalk can be suppressed more effectively, and the high-frequency characteristics can be improved. Further, by arranging the ground terminals in the outermost row of the arrangement of the ground terminals and the signal terminals, it is possible to configure a pseudo coaxial for all the signal terminals.

[0036]

[0037]

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a male connector of a first embodiment of a high-speed transmission connector of the present invention.

FIG. 2 is a partially cutaway perspective view of the female connector of the first embodiment of the high-speed transmission connector of the present invention.

FIG. 3 is an enlarged perspective view of a distal end portion of a male ground terminal of the male connector shown in FIG. 1;

4 is a cross-sectional view of a signal terminal row in a state where the male connector shown in FIG. 1 and the female connector shown in FIG. 2 are connected.

FIG. 5 is a cross-sectional view of the ground terminal row in a state where the male connector shown in FIG. 1 and the female connector shown in FIG. 2 are connected.

FIG. 6 is a diagram showing an arrangement of ground terminals and signal terminals in the high-speed transmission connector according to the first embodiment of the present invention.

FIG. 7 is a view showing an arrangement of ground terminals and signal terminals in a high-speed transmission connector according to a second embodiment of the present invention.

FIG. 8 is a diagram showing an arrangement of ground terminals and signal terminals in a high-speed transmission connector according to a third embodiment of the present invention.

FIG. 9 is a perspective view of a conventional high-speed transmission connector.

[Explanation of symbols]

 1 Male connector 2 Female connector 3,13 Ground terminal 3a Male ground terminal 3b Female ground terminal hole 4,14 Signal terminal 4a Male signal terminal 4b Female signal terminal 5a Male housing 5b Female housing 7 Contact Projection 9a Male connection 9b Female connection

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 13/648-13/658

Claims (4)

(57) [Claims] 1. A plurality of signal terminals and a plurality of ground terminals and high-speed transmission connector arranged in a staggered with each other, said ground terminal extends between adjacent signal terminals, the
The tip of the extended part overlaps when viewed from the signal terminal.
A single signal terminal is surrounded by four surrounding ground terminals. 2. The high-speed transmission connector according to claim 1, wherein a ground terminal is arranged in an outermost row of the arrangement of the signal terminals and the ground terminals. 3. The high-speed transmission connector according to claim 1, wherein the ground terminal has a cross-shaped cross section. 4. The high-speed transmission connector according to claim 3, wherein a part of the cross-shaped end of the ground terminal is further extended, and the extended part overlaps when viewed from the signal terminal.