JP2004241178A - Connector for circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector for a circuit board, wherein two identical paired connectors are usable, its structure is simple, and deterioration of signal transmission characteristics is prevented. <P>SOLUTION: In a receptacle connector (a half) 7a installed in a mid plane (a circuit board), a number of respectively two-paired contacts 1 and 2 are disposed with equal spaces in vertical and horizontal directions in a housing 6, and in the same number. The respectively two-paired contacts are surrounded by a plurality of first ground plates (not shown), and second ground plates (not shown) crossing the respective first ground plates like a grid. The respectively two-paired contacts are partitioned by third ground plates 5, respectively. The respective third ground plates are twisted by 90° at their intermediate parts. The respectively two-paired contacts are bent like a crank at their intermediate parts, and arranged substantially in parallel with the respective third ground plates. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a board-mounting connector that can prevent occurrence of crosstalk between two contact pairs, and relates to a high-speed differential signal transmission receptacle connector as one application.
[0002]
[Prior art]
An example of a conventional high-speed differential signal transmission connector will be described with reference to FIG. Receptacle connectors are attached to both sides of the midplane. The plug connector daughter board 10 is arranged vertically on one side of the midplane, and the plug connector 9 is attached to one surface of the plug connector daughter board 10. A plug connector daughter board 12 is horizontally arranged on the other side of the midplane, and the plug connector 11 is attached to one surface of the plug connector daughter board 12.
[0003]
The contact pair 1 includes a contact 1a and a contact 1b, and the contact pair 2 includes a contact 2a and a contact 2b. As shown in FIG. 5 (A), on one side of the midplane, contact pairs 1 and 2 are arranged in rows, and as shown in FIG. 5 (B), on the other side of the midplane, contacts The pairs 1 and 2 are arranged in a column.
[0004]
The top, bottom, left, and right four surfaces of each contact pair 1 and 2 are surrounded by a first ground plate 3 and a second ground plate 4 in a square frame shape. A third ground plate 5 is disposed between the compact pair 1 and the compact pair 2 within the square frame.
[0005]
This type of high-speed differential signal transmission connector is described in some documents (for example, see Patent Document 1).
[0006]
[Patent Document 1]
JP 2002-117938 A (page 3, FIG. 1)
[0007]
[Problems to be solved by the invention]
In the conventional high-speed differential signal transmission connector, impedance control is difficult and the performance of the connector is deteriorated. To improve the performance of the connector, change the structure of the plug connector on both sides via the midplane, or change the structure so that each contact has a coaxial structure and no contact pair is connected. I must. However, with these changes, the number of parts increases and the relationship of contact pairs is difficult to maintain, so that the signal transmission characteristics tend to deteriorate.
[0008]
Therefore, the present invention improves the drawbacks of the conventional high-speed differential signal transmission connector, allows two identical mating connectors to be used, has a simple structure, and prevents deterioration in signal transmission characteristics. It is intended to provide a mounting connector.
[0009]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems.
[0010]
1. One of the pair of connectors is mounted on the front surface of the substrate, the other is mounted on the back surface of the substrate, the one can be fitted to and detached from the first mating connector, and the other is the second mating connector. The one has a first housing, the other has a second housing, and each of a plurality of two contact pairs penetrates the substrate and A plurality of first ground plates and a plurality of second ground plates that are held by the first housing and the second housing and intersect the first ground plates in a grid pattern penetrate the substrate. The two contact pairs are held by the first housing and the second housing, and the two contact pairs are surrounded by the first ground plate and the second ground plate. Each two sets of contact pairs are separated by a third ground plate, respectively, wherein each of the third ground plate substrate mounting connector is twisted 90 ° in the middle.
[0011]
2. 2. The board mounting connector according to claim 1, wherein the two contact pairs are arranged in a square shape.
[0012]
3. 2. The board mounting connector according to claim 1, wherein each of the two contact pairs is bent in a crank shape at an intermediate portion.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
A receptacle connector for high-speed differential signal transmission according to an embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view of an example of use of the connector, FIG. 2 is a perspective view of the structure of the connector, FIGS. 3A and 3B are schematic arrangement diagrams of contacts of the connector, and FIG. Enlarged perspective views of the third ground plate are respectively shown.
[0014]
As shown in FIG. 1, a midplane 8 is vertically arranged at the center, and receptacle connectors 7 a and 7 b are attached to both left and right sides of the midplane 8. On the left side of the midplane 8, a daughter board 10 is arranged in the vertical direction, and a Bragg connector 9 is attached to one surface of the daughter board 10. A daughter board 12 is horizontally arranged on the right side of the midplane 8, and a plug connector 11 is attached to one surface of the daughter board 12. The connector of the present invention is used when connecting the two daughter boards 10 and 12 as described above.
[0015]
As shown in FIG. 2, in the receptacle connectors 7a and 7b, the same number of contact pairs 1 and 2 are arranged at equal intervals in the vertical and horizontal directions. A third ground plate 5 is disposed between the contact pairs 1 and 2. Each of the contact pairs 1 and 2 includes contacts 1a and 1b and contacts 2a and 2b arranged so as to be symmetric with respect to the center of the square. Each of the contacts 1a, 1b, 2a, 2b includes a first connecting portion 1a1, 1b1, 2a1, 2b1 (not visible in FIG. 2) and a second connecting portion 1a2, 1b2, 2a2 (in FIG. 2). , 2b2 and intermediate portions from the first connecting portions 1a1, 1b1, 2a1, 2b1 and the connecting portions 1a3, 1b3, 2a3, 2b3 connecting the second connecting portions 1a2, 1b2, 2a2, 2b2 Are bent into a crank shape and integrally formed. The connecting portions 1a3, 1b3, 2a3, 2b3 of the contacts 1a, 1b, 2a, 2b and the vicinity thereof are respectively held in the through holes 6a, 6a provided in the housings 6, 6 of the receptacle connectors 7a, 7b. Moreover, it penetrates each through-hole (not visible in FIG. 1) provided in the midplane 8.
[0016]
The contact pairs 1 and 2 are arranged in rows on the front surfaces of the housings 6 and 6 as shown in FIG. 3A, and arranged in rows on the back surfaces of the housings 6 and 6 as shown in FIG. 3B. Is done. The first connecting portions 1a1, 1b1, 2a1, 2b1 of the contacts 1a, 1b, 2a, 2b are connected to the contacts of the plug connector 11, and the second connecting portions 1a2, 1b2, 2a2, 2b2 are plug connectors. It connects with each contact of 9.
[0017]
The top, bottom, left, and right four surfaces of each contact pair 1 and 2 are surrounded by a first ground plate 3 and a second ground plate 4 in a square frame shape. A third ground plate 5 is disposed between the contact pair 1 and the contact pair 2 within the square frame.
[0018]
As shown in FIG. 4, each third ground plate 5 is twisted by 90 ° at the intermediate portion 5 a. Each contact pair 1, 2 is disposed substantially parallel to each third ground plate 5.
[0019]
When the contact pairs 1 and 2 are arranged in this way, as shown in FIG. 1, the daughter board 10 is vertically arranged on one side and the daughter board 12 is horizontally arranged on the other side via the midplane 8, respectively. In the case of connection, the plug connector 9 and the plug connector 11 can be configured identically.
[0020]
Further, each contact pair 1 and each contact pair 2 is surrounded by four sides on the top, bottom, left and right by each first ground plate 3 and each second ground plate 4, and each third ground plate 5 Since it is partitioned, the occurrence of crosstalk between the contact pairs 1 and 2 is prevented.
[0021]
Furthermore, since the number of parts of the plug connectors 9 and 11 does not increase, the cost does not increase. Further, since the signal is transmitted while the relationship between the contact pairs 1 and 2 is maintained, the deterioration of the signal transmission characteristic is prevented, and the impedance can be easily controlled.
[0022]
【The invention's effect】
As will be apparent from the above description, the present invention provides the following effects.
[0023]
1. Generation of crosstalk between each contact pair is prevented.
[0024]
2. By changing the input side position and the output side position of each contact of the connector, two orthogonal mating connectors can be used to connect two orthogonal daughter boards.
[0025]
3. Since the signal is transmitted while maintaining the contact pair relationship of the mating connector, it is possible to prevent the signal transmission characteristics from deteriorating and to easily control the impedance.
[0026]
4). Since the number of parts of the mating connector does not increase, the cost does not increase.
[0027]
5. The contacts in the connector can be arranged with high density, and the connector can be easily made compact.
[Brief description of the drawings]
FIG. 1 is a perspective view of an example of use of a receptacle connector for high-speed differential signal transmission according to an embodiment of the present invention.
FIG. 2 is a schematic enlarged perspective view of a main part of the connector.
3A and 3B are schematic arrangement diagrams of contacts in the connector, in which FIG. 3A shows the one on the plug connector daughter board side, and FIG. 3B shows the other plug connector daughter board side.
FIG. 4 is an enlarged perspective view of a third ground plate in the connector.
FIGS. 5A and 5B are schematic arrangement diagrams of contacts in a conventional high-speed differential signal transmission receptacle connector, where FIG. 5A shows one plug connector daughter board side, and FIG. 5B shows the other plug connector daughter board. Each one is shown.
[Explanation of symbols]
1 contact pair 1a, 1b contact 1a1, 1b1 first connection part 1a2, 1b2 second connection part 1a3, 1b3 connection part 2 contact pair 2a, 2b contact 2a1, 2b1 first connection part 2a2, 2b2 second connection Portions 2a3, 2b3 Connecting portion 3 First ground plate 4 Second ground plate 5 Third ground plate 5a Intermediate portion 6 Housing 6a Through hole 7a, 7b Receptacle connector 8 Midplane (substrate)
9 Plug connector 10 Daughter board 11 Plug connector 12 Daughter board

Claims (3)

One of the pair of connectors is mounted on the front surface of the substrate, the other is mounted on the back surface of the substrate, the one can be fitted to and detached from the first mating connector, and the other is the second mating connector. Can be removed from the mating,
The one has a first housing and the other has a second housing;
Each of the plurality of two contact pairs penetrates the substrate and is held by the first housing and the second housing,
A plurality of first ground plates and a plurality of second ground plates intersecting each first ground plate in a grid pattern penetrate through the substrate to the first housing and the second housing. Retained,
Each of the two contact pairs is surrounded by each first ground plate and each second ground plate,
Each of the two contact pairs is partitioned by a third ground plate, and each third ground plate is twisted by 90 ° in the middle. 2. The board mounting connector according to claim 1, wherein the two contact pairs are arranged in a square shape. 2. The board mounting connector according to claim 1, wherein each of the two contact pairs is bent in a crank shape at an intermediate portion.

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