JP4113402B2 - connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to simplification of a connector structure and prevention of deterioration of signal transmission characteristics, and relates to a receptacle connector for high-speed differential signal transmission as one application.
[0002]
[Prior art]
The main points of 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. A plug connector daughter board 7a is vertically arranged on one side of the midplane, and the plug connector is attached to one surface of the plug connector daughter board 7a. On the other side of the midplane, a plug connector daughter board 7b is disposed in the horizontal direction, and the plug connector is attached to one surface of the plug connector daughter board 7b. Both plug connectors are the same.
[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. 6 (A), contact pairs 1 and 2 are arranged in a row on one side of the midplane, and as shown in FIG. 6 (B), contacts on the other side of the midplane. The pairs 1 and 2 are arranged in a column.
[0004]
This type of high-speed differential signal transmission connector is described in some documents (for example, see Patent Document 1).
[0005]
[Patent Document 1]
JP 2002-117938 A (page 3, FIG. 1)
[0006]
[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.
[0007]
Therefore, the present invention improves the drawbacks of the conventional high-speed differential signal transmission connector, can use two identical mating connectors, has a simple structure, and can prevent signal transmission characteristics from deteriorating. It is intended to provide a connector.
[0008]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems.
[0009]
A pair of contacts and a housing for holding the pair of contacts, the pair of contacts each having a crank shape from a contact portion, a terminal portion, and a connecting portion connecting the contact portion and the terminal portion; The contact portions and the terminal portions of the pair of contacts are located at four corners of a square in the axial plan view of the pair of contacts, and the pair of contacts A connector in which the contact portions and the terminal portions are arranged so as to be symmetric with respect to a center point of the rectangle in a direction orthogonal to the axial direction of the contacts .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The receptacle connector for high-speed differential signal transmission according to two embodiments of the present invention will be described.
[0012]
First, a connector according to a first 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, and FIGS. 3A and 3B are schematic arrangement diagrams of contacts of the connector.
[0013]
As shown in FIG. 1, a midplane 6 is vertically arranged at the center, and receptacle connectors 4 a and 4 b are attached to both left and right sides of the midplane 6. On the left side of the midplane 6, a daughter board 7a is arranged in the vertical direction, and a plug connector 5a is attached to one surface of the daughter board 7a. A daughter board 7b is horizontally arranged on the right side of the midplane 6, and a plug connector 5b is attached to one surface of the daughter board 7b. The connector of the present invention is used when connecting the two daughter boards 7a and 7b as described above.
[0014]
As shown in FIG. 2, in the connector, a large number of contact pairs 1 are arranged at equal intervals in the vertical and horizontal directions. Each contact pair 1 includes a contact 1a and a contact 1b arranged so as to be symmetric with respect to the center point of the square. Each contact 1a, 1b is bent in a crank shape from contact portions 1a1, 1b1, terminal portions 1a2, 1b2, and connecting portions 1a3, 1b3 connecting the contact portions 1a1, 1b1 and terminal portions 1a2, 1b2. Are configured as a single unit. The connecting portions 1a3 and 1b3 of the contacts 1a and 1b and the vicinity thereof are fixed in the through holes 3a provided in the housing 3 of the receptacle connectors 4a and 4b, respectively. The contact pairs 1 are arranged in rows on the front surface of the housing 3 as shown in FIG. 3A, and arranged in rows on the back surface of the housing 3 as shown in FIG. The contact portions 1a1 and 1b1 of the contacts 1a and 1b are connected to the contacts of the plug connector 5a, and the terminal portions 1a2 and 1b2 are connected to the contacts of the plug connector 5b.
[0015]
As described above, since each contact 1a, 1b of each contact pair 1 is configured and arranged in a crank shape, the daughter board is arranged in the vertical direction as shown in FIG. The plug connector 5a attached to 7a and the plug connector 5b attached to the daughter board 7b arranged in the horizontal direction are attached to both the left and right sides of the midplane 6 arranged vertically in the center. When connecting via the receptacle connectors 4a and 5a, the plug connector 5a and the plug connector 5b can be configured identically.
[0016]
By configuring as described above, the number of parts of the plug connectors 5a and 5b does not increase, so the cost does not increase. Further, since the signal is transmitted while the relationship between the contact pairs 1 is maintained, the deterioration of the signal transmission characteristics is prevented, and the impedance can be easily controlled.
[0017]
As shown in FIG. 2B, the cross sections of the contact portions 1a1 and 1b1 of the contacts 1a and 1b are square. However, if the four corners are faced, they can be formed in an octagon. As a result, the right-angle portions at the four corners are eliminated, so that the contacts of the plug connector 5a are hardly damaged during the fitting. The same applies to the cross sections of the terminal portions 1a2 and 1b2.
[0018]
Next, a second embodiment of the present invention will be described with reference to FIGS. For the connector of the second embodiment, the description of the same points as in the first embodiment is omitted, and only the differences are described. FIG. 4 is a perspective view of the structure of the connector, and FIGS. 5A and 5B are schematic arrangement diagrams of contacts of the connector.
[0019]
As shown in FIG. 4, in the connector, a large number of contact pairs 1 and 2 are arranged at equal intervals in the vertical and horizontal directions. Each contact pair 1 composed of contact 1a and contact 1b and each contact pair 2 composed of contact 2a and contact 2b are arranged so as to form a square. The contact pairs 1 and 2 are arranged in rows on the front surface of the housing 3 as shown in FIG. 5A, and arranged in rows on the back surface of the housing 3 as shown in FIG.
[0020]
When the contact pairs 1 and 2 are arranged in this manner, as shown in FIG. 1, the daughter board 7a is vertically arranged on one side and the daughter board 7b is horizontally arranged on the other side via the midplane 6, respectively. In the case of connection, the plug connector 5a and the plug connector 5b can be configured identically.
[0021]
By configuring as described above, the number of parts of the plug connectors 5a and 5b does not increase, so 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. Furthermore, in the second embodiment, it is easier to achieve higher contact density and smaller connectors than in the first embodiment.
[0023]
【The invention's effect】
As will be apparent from the above description, the present invention provides the following effects.
[0024]
1. 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]
2. 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]
3. Since the number of parts of the mating connector does not increase, the cost does not increase.
[0027]
4). 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 a first embodiment of the present invention.
2A is a perspective view of the connector and a pair of contacts, and FIG. 2B is a plan view of the contacts from the contact portion side.
FIGS. 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 a perspective view of a receptacle connector for high-speed differential signal transmission and two pairs of contacts according to a second embodiment of the present invention.
FIGS. 5A and 5B are schematic arrangement diagrams of contacts in the connector, in which FIG. 5A shows the one on the plug connector daughter board side, and FIG. 5B shows the other plug connector daughter board side.
FIGS. 6A and 6B are schematic arrangement diagrams of contacts in a conventional high-speed differential signal transmission receptacle connector, where FIG. 6A shows the one on the plug connector daughter board side, and FIG. 6B shows the other plug connector daughter board. Each one is shown.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Contact pair 1a, 1b Contact 1a1, 1b1 Contact part 1a2, 1b2 Terminal part 1a3, 1b3 Connection part 2 Contact pair 2a, 2b Contact 3 Housing 3a Through-hole 4a, 4b Receptacle connector 5a, 5b Plug connector 6 Midplane 7a, 7b Daughter board

Claims (1)

A pair of contacts and a housing holding the pair of contacts;
Each of the pair of contacts is configured to be bent in a crank shape from a contact portion, a terminal portion, and a connecting portion that connects the contact portion and the terminal portion,
In a plan view in the axial direction of the pair of contacts, both contact portions and both terminal portions of the pair of contacts are located at four corners of a square, and the contact portions of the pair of contacts The connector, wherein the terminal portions are arranged so as to be symmetric with respect to a center point of the rectangle in a direction orthogonal to the axial direction of the contacts .

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