JPH11251005A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector having low reflection noise by forming the opposite faces of the press-in hold sections of adjacent signal and grounding receptacles and plugs into shapes and sizes overlapped at prescribed intervals. SOLUTION: The opposite faces of the press-in hold sections 112, 122 of signal and grounding receptacle contacts 11, 12 and the press-in hold sections 212, 222 of signal and ground plug contacts 21, 22 have wide areas and are overlapped at prescribed intervals, and the electrostatic capacities between the adjacent signal and grounding receptacle contacts 11, 12 and plug contacts 21, 22 can be increased, thereby the characteristic impedances of signal lines at these portions can be made lower than those at the portions of coupling contact springs 111, 121 and coupling contact pins 211, 221. The characteristic impedances of the signal lines are balanced at various sections and can be matched with the characteristic impedance of a connected electronic device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector, and more particularly to a connector in which a plurality of high-speed signal lines are formed by fitting a plug and a receptacle.

[0002]

2. Description of the Related Art In a connector for connecting and forming a plurality of signal lines by fitting a plug and a receptacle, when a high-speed signal line is obtained, a signal line and a ground line are connected to each other in order to suppress variations in the characteristics of the signal line. In order to obtain good transmission performance, the characteristic impedance determined by the capacitance between these signal lines and the ground line should be close to the impedance of the connected equipment to reduce reflection noise. ,
In addition, it is necessary to reduce electromagnetic coupling between signal lines, that is, crosstalk noise. FIG. 3 shows a typical example of a conventional connector for connecting and forming a high-speed signal line.

This connector has a plurality of signal receptacle contacts 11a each including a fitting contact spring portion 111a, a press-fit holding portion 112a, and a terminal 113a.
And the fitting contact spring portion 121a and the press-fit holding portion 1 respectively.
A plurality of grounding receptacle contacts 12a each including a terminal 22a and a terminal 123a, and the plurality of signal receptacle contacts 11a and the grounding receptacle contacts 12a are alternately used for signal and ground, and for signal.
A receptacle 10a including a receptacle housing 13a that is staggered for grounding so as to be in another upper and lower rows and held and fixed by the press-fit holding portions 112a and 122a, and a fitting contact pin portion 211a and a press-fitting, respectively. A plurality of signal plug contacts 21a each including a holding portion 212a and a terminal 213a;
21a, a plurality of grounding plug contacts 22a including the press-fit holding portion 212a and the terminals 223a, and the plurality of signal plug contacts 21a and the grounding plug contacts 22a are alternately used for signal and ground, and for signal. It has a plug 20a including a plug housing 23a which is staggered for grounding so as to be in another upper and lower rows, and which is held and fixed by the press-fit holding portions 212a, 222a, and the receptacle 10a and the plug 20a are fitted. A plurality of signal receptacle contacts 11a, a grounding receptacle contact 12a and a plurality of signal plug contacts 2
1a and the grounding plug contact 22a are connected correspondingly, and a plurality of signal lines are connected and formed by adjacent one-to-one signal and grounding contacts.

In this connector, the receptacle 10
a and the plug 20a are fitted together, the fitting contact pin portions 211a of the signal plug contacts 21a are inserted into the fitting contact spring portions 111a of the signal receptacle contacts 11a, and are fitted together. Contact, connect,
Similarly, the fitting contact pin portions 221a of the grounding plug contacts 22a are inserted into the fitting contact spring portions 121a of the grounding receptacle contacts 12a, and are fitted to each other, and are contacted and connected at a specified pressure. In order to obtain a specified contact pressure at the time of this contact and connection, the fitting contact spring portions 111a, 121
There is a limit to the minimum dimension of a, and a certain size is required.

On the other hand, when this connector is mounted on an electronic device or the like, the area occupied by the connector and the height of the connector are naturally limited, and it is necessary to increase the signal contact interval in order to reduce crosstalk noise. The contacts are arranged in a staggered arrangement with respect to the mating surfaces of the receptacle 10a and the plug 20a that face each other. Further, in this connector, the press-fit holding portions 112a, 1a of the signal receptacle contact 11a and the grounding receptacle contact 12a are provided.
22a is approximately the same size as the fitting contact spring portions 111a and 121a, and is a signal plug contact 21a.
a and press-fit holding portion 21 of grounding plug contact 22a
2a and 222a are fitting contact pin portions 211a and 22a.
It is slightly larger than 1a.

[0006]

In this conventional connector, in order to obtain a specified contact pressure, a fitting contact spring portion (1) is required.
11a, 121a) need a certain size,
In addition, the contacts (11a, 12a, 21a, 22a) are used in order to reduce dimensional restrictions during mounting and to reduce crosstalk noise.
a) are arranged in a staggered manner with respect to the mating surfaces of the receptacle 10a and the plug 20a facing each other, and press-fit holding portions (112a, 122a, 212a, 222a) of these contacts.
Is approximately the same as or slightly larger than the fitting contact spring portions (111a, 121a) and the fitting contact pin portions (211a, 221a). And it is difficult to reduce the characteristic impedance of each signal line to the characteristic impedance (for example, 50Ω) of the electronic device to be connected, and there is a problem that reflected noise is generated. Therefore, the distance becomes slightly longer, but since there is only the housing material, the crosstalk noise is relatively large.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, it is an object of the present invention to adjust the characteristic impedance to the characteristic impedance of the connected electronic device, thereby reducing the reflection noise and, at the same time, reducing the crosstalk noise between the signal contacts. It is an object of the present invention to provide a connector capable of obtaining high transmission quality by reducing the number of connectors.

[0008]

The connector according to the present invention has the following means in order to achieve the above object. That is, a plurality of signal and ground receptacle contacts, each having a fitting contact spring portion and a press-fit holding portion, are alternately provided on the receptacle housing for signal and ground, and the fitting contact spring portion is provided. Receptacles for signals and grounding, staggered in separate upper and lower rows and held and fixed by press-fit holding parts, and a plurality of signals each having a fitting contact pin part and a press-fit holding part The plug contacts for signal and ground are alternately arranged on the plug housing so that the mating contact pins are arranged in upper and lower rows for signal and ground. And a plug held and fixed by the press-fit holding portion.
A connector for contact-connecting a grounding receptacle contact and a plug contact in a corresponding manner to connect and form a plurality of one-to-one signal lines for signal and ground, wherein the plurality of signal lines of the receptacle are provided for signal and ground. The press-fit holding portion of each receptacle contact, and the press-fit holding portion of each of the plurality of plug contacts for signal and ground of the plug, the opposing surfaces between adjacent signal / ground portions have a predetermined spacing. A connector characterized in that it has a shape and a size that overlap with each other at a distance.

The plug contact for signal of the plug is formed by a press-fit holding portion formed in a quadrilateral shape having a predetermined thickness and size, and an upper end of a front side of the quadrilateral shape of the press-fit holding portion. A structure that includes a fitting contact pin portion protruding outside of this side from the portion and extending by a predetermined length, and a terminal provided to protrude on a rear side of the quadrilateral of the press-fit holding portion, The plug contact for grounding of the plug has the same structure as the plug contact for signal except that the projecting portion of the fitting contact pin portion is the lower end portion of the front side of the quadrilateral, and A signal receptacle contact is formed from a press-fit holding portion including two parallel side plates having a quadrilateral shape of a predetermined size, and an upper end portion of a front side of each of the two side plates of the press-fit holding portion. A mating contact spring including two side leaf springs that protrude outwardly from each other and extend by a predetermined length and are in pressure contact with both sides of the mating contact pin portion of the signal plug contact at the time of mating. And a terminal protrudingly provided on a rear side of the press-fit holding portion, the receptacle contact for grounding the receptacle has the same structure as the receptacle contact for the signal, and the signal The receptacle contact is configured to be held up and fixed to the receptacle housing with the top and bottom reversed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In one embodiment of the present invention, a plurality of signal and ground receptacle contacts, each having a mating contact spring portion and a press-fit holding portion, are provided in a receptacle housing, in a signal housing and in a signal housing. The receptacles are alternately arranged for grounding, and the mating contact springs are staggered for signal and grounding in upper and lower rows and held and fixed by the press-fitting holding parts. A plurality of signal and ground plug contacts each having a pin portion and a press-fit holding portion are alternately provided on the plug housing for signal and ground, and the fitting contact pin portions thereof are provided for signal and ground. A plurality of signal and grounding receptacle contacts which are fitted in a staggered arrangement so as to form another row below and which are held and fixed by press-fitting holding portions, and which are fitted with these receptacles and plugs. And a plurality of one-to-one signal lines for signal and ground are connected to form a plurality of signal lines corresponding to the signal and ground, and each of the plurality of signal and ground receptacle contacts is press-fitted into the receptacle. Holding part, and press-fit holding parts of each of the plurality of signal and ground plug contacts of the plug,
Opposing surfaces between adjacent signals and grounds have a configuration and a size that overlap with each other at a predetermined interval.

With such a configuration and structure,
Due to various restrictions, even if the characteristic impedance of the mating contact spring portion and the mating contact pin portion of each signal line cannot be reduced to the characteristic impedance of the connection electronic device, the press-fit holding portion of the receptacle contact sandwiching these portions. And the capacitance of the press-fit holding portion of the plug contact can be increased to lower the characteristic impedance of that portion, so that the characteristic impedance of each signal line including the signal and ground receptacle contacts and the plug contact is connected. It can be adjusted to the characteristic impedance of the electronic device, reducing reflected noise,
In addition, a press-fit holding portion of the receptacle contact and the plug contact for the ground is inserted between the press-fit holding portion of the signal receptacle contact and the plug contact, so that signal crosstalk (crosstalk noise) can be reduced, and transmission quality can be reduced. Can be increased.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially exploded perspective view showing one embodiment of the present invention, and FIGS. 2A to 2D are cross-sectional views showing holding and fixing states of signal and ground contacts of this embodiment, and a receptacle. FIG. 4 is a layout view of contacts as viewed from the side of a plug and a plug. In this embodiment, the receptacle 10
And a connector for connecting and forming a plurality of signal lines by fitting the receptacle 10 and the plug 20 together. The receptacle 10 and the plug 20
The details are as follows. The plug 20 has a press-fit holding portion 212 formed in a quadrilateral shape having a predetermined thickness and size, and protrudes outside of this side from the upper end portion of the front side of the quadrilateral shape of the press-fit holding portion 212 in advance. A plurality of signal plug contacts 21 having a structure including a fitting contact pin portion 211 extending by a predetermined length and a terminal 213 protruding from a rear side of the quadrilateral of the press-fit holding portion 212; A plurality of grounding plug contacts 22 having the same structure as the signal plug contact 21 except that the projecting portion of the fitting contact pin portion 221 is the lower end portion of the front side of the quadrilateral, and a plurality of these signal plug contacts. The plug contact 21 and the grounding plug contact 22 are alternately used for signal and grounding, and their fitting contact pin portions 211 and 221 are provided.
Are staggered with respect to the mating surface with the receptacle so that they are arranged in upper and lower rows for signal and ground, and the press-fit holding portions 212 and 222 are opposed to each other between the adjacent signal and ground. The surface and the plug housing 23 are held and fixed so as to overlap with each other at a predetermined interval.

The receptacle 10 includes a press-fit holding portion 112 including two parallel side plates of a quadrilateral shape having a predetermined size, and a front side of each of the two side plates of the press-fit holding portion 112. The two side leaf springs projecting from the upper end portion to the outside of this side and extending by a predetermined length and pressurizing and contacting both sides of the fitting contact pin 211 of the signal plug contact 21 at the time of fitting are provided. A plurality of signal receptacle contacts 11 having a structure including a mating contact spring portion 111 and a terminal 113 protruding from a rear side of the press-fit holding portion 112; and a plurality of signal receptacle contacts 11 having the same structure as the signal receptacle contact 11. Grounding receptacle contact 12, and a plurality of signal receptacle contacts 11 and grounding receptacle contacts 12
Are alternately arranged for signal and ground, and the fitting contact spring portions 111 and 121 are arranged in a zigzag manner so as to be in upper and lower rows for signal and ground.
22, the opposing surfaces between adjacent signal and ground
A configuration having a receptacle housing 13 for holding and fixing so as to overlap with each other at a predetermined interval;
It has a structure.

In this embodiment, fitting contact spring portions 111 and 121 of a plurality of signal receptacle contacts 11 and grounding receptacle contacts 12 and fitting contacts of a plurality of signal plug contacts 21 and grounding plug contacts 22 are provided. The pin portions 211 and 221 are in a staggered arrangement similar to the conventional example, and when the receptacle 10 and the plug 20 are fitted, the characteristic impedance of the signal line due to these portions is the characteristic impedance of the connection electronic device (for example, 50Ω). It will be higher.

However, the press-fit holding portions 112 and 122 of the signal receptacle contact 11 and the grounding receptacle contact 12 and the press-fitting holding portions 212 and 222 of the signal plug contact 21 and the grounding plug contact 22 sandwiching these portions from both sides. Since the opposing surfaces between the adjacent signal and ground lines overlap each other at a predetermined interval and have a larger area than the conventional example, Can be increased, and the characteristic impedance of the signal line by these portions can be made lower than that of the fitting contact spring portion and the fitting contact pin portion.

Accordingly, a portion having a high characteristic impedance is sandwiched by portions capable of lowering the characteristic impedance. By appropriately determining the shape and dimensions of each portion, the characteristic impedance of each signal line is balanced by each portion. At the same time, the characteristic impedance of the connected electronic device can be matched, and the reflection noise can be reduced.

Further, since the press-fit holding portion 122 of the grounding receptacle contact 12 is inserted between the press-fit holding portions 112 of the adjacent signal receptacle contacts 11 and the space therebetween is shielded, crosstalk noise is reduced. be able to. That is, crosstalk noise and reflection noise can be reduced, and transmission quality can be improved. In addition, the shape and dimensions of each part, after first determining the fitting contact spring part and the fitting contact pin part from the mechanical and structural viewpoints such as contact pressure, occupied area and height during mounting,
The press-fit holding portion can be determined from an electrical viewpoint such as characteristic impedance and crosstalk noise.

[0018]

As described above, the present invention provides a press-fit holding portion for each of a plurality of signal and ground receptacle contacts of a receptacle, and a press-fit holding portion for each of a plurality of signal and ground plug contacts of a plug. By making the opposing surfaces between the adjacent signal and grounding surfaces overlap each other at a predetermined interval, the capacitance of the press-fit holding portion is increased to increase the signal. The characteristic impedance of the line can be reduced, so that the fitting contact spring portion and the fitting contact pin portion having a high characteristic impedance are sandwiched between these press-fit holding portions, and the entire characteristic impedance can be adjusted to the characteristic impedance of the connection electronic device. It is possible to reduce the reflection noise, and press-hold for ground between adjacent press-holding parts for signals. There therefore is inserted can be reduced crosstalk noise signal, thus there is an effect that it is possible to increase the transmission quality.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view showing one embodiment of the present invention.

FIG. 2 is a sectional view showing a holding state of the signal and ground contacts of the embodiment shown in FIG. 1, and a layout view of the contacts as viewed from the fitting surface side of the receptacle and the plug.

FIG. 3 is a partially exploded perspective view showing an example of a conventional connector.

[Explanation of symbols]

 10, 10a Receptacle 11, 11a Receptacle contact for signal 12, 12a Receptacle contact for ground 13, 13a Receptacle housing 20, 20a Plug 21, 21a Plug contact for signal 22, 22, a Plug contact for grounding 23, 23a Plug housing 111, 111a, 121, 121a Fitting contact spring portions 112, 112a, 122, 122a Press-fit holding portions 113, 113a, 123, 123a Terminals 211, 211a, 221, 221a Fitting contact pin portions 212, 212a, 222, 222a Press-fit holding portions 213, 213a, 223, 223a terminals

Claims (2)

[Claims] A plurality of signal and ground receptacle contacts each having a mating contact spring portion and a press-fit holding portion are alternately connected to a receptacle housing for signal and ground use, and the mating contacts are provided. A plurality of receptacles, each having a fitting contact pin portion and a press-fit holding portion, wherein the spring portions are staggered so as to be arranged in upper and lower rows for signal and ground, and held and fixed by the press-fit holding portion. The signal and grounding plug contacts are staggered in the plug housing so that the signal and grounding plug contacts are alternately arranged in upper and lower rows for signal and grounding. And a plug held and fixed by the press-fit holding portion. The receptacle and the plug are fitted to each other, and the plurality of signal and ground receptacle contacts and plug contacts are brought into contact with each other. A connector for connecting and forming a plurality of one-to-one signal lines for signal and ground, comprising: a plurality of press-fit holding portions of a plurality of signal and ground receptacle contacts of the receptacle; Each of the press-fit holding portions of the signal and ground plug contacts has a shape and a size such that opposing surfaces between adjacent signal and ground use overlap with each other at a predetermined interval. Connector to be. 2. A press-fit holding portion formed in a quadrilateral shape having a predetermined thickness and size, and an upper end of a front side of the quadrilateral shape of the press-fit holding portion. A structure that includes a fitting contact pin portion protruding outside of this side from the portion and extending by a predetermined length, and a terminal provided to protrude on a rear side of the quadrilateral of the press-fit holding portion, The plug contact for grounding of the plug has the same structure as the plug contact for signal except that the projecting portion of the fitting contact pin portion is the lower end portion of the front side of the quadrilateral, and A signal receptacle contact is formed from a press-fit holding portion including two parallel side plates of a quadrilateral shape having a predetermined size, and an upper end portion of a front side of each of the two side plates of the press-fit holding portion. Outside A mating contact spring portion including two side leaf springs which project toward the side and extend by a predetermined length to press and contact both sides of the mating contact pin portion of the signal plug contact at the time of mating. And a terminal protruding from the rear side of the press-fit holding portion, and a receptacle contact for grounding the receptacle,
The same structure as the signal receptacle contact,
2. The connector according to claim 1, wherein the signal receptacle contact is held upside down and fixed to the receptacle housing upside down.