JPH08321358A - Connector with ground plate - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a connector with a ground plate between opposing signal contacts, which is capable of matching the characteristic impedance between the signal contacts. [Structure] Plug contacts 11, 15 and receptacle contacts 24, 25 are arranged in two rows in a longitudinal direction in a plug housing 11 and a receptacle housing 21, which are engageable with each other, and both housings 11, 21 are arranged.
With both contacts 14, 15, 2 engaged with each other
The contact portions of 4, 25 are configured to come into contact with each other.
Between the plug contact rows 14 and 15, a plug gland plate 12 having a plug gland plate body formed at the same height as the contacts 14 and 15 is disposed in the plug housing 11.

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 with a ground plate in which a ground plate is provided between contacts arranged in two rows.

[0002]

2. Description of the Related Art As a connector assembly composed of a receptacle connector and a plug connector which are configured to be able to be fitted, a receptacle contact and a plug contact are arranged in two rows in the receptacle housing and the plug housing, and the receptacle housing and the plug housing are connected to each other. It is conventionally known that the contacts are electrically connected by fitting. As such a connector assembly, there are a shield type electrical connector disclosed in Japanese Patent Laid-Open No. 5-290927, a multi-pole connector disclosed in Japanese Utility Model Laid-Open No. 4-111169, and the like.

In each of these connectors, a shield plate is provided between the receptacle contacts or the plug contacts, which are one of the receptacle housing or the plug housing and are arranged in two rows, and the shield plate is provided between the contact rows. Prevent crosstalk.

In addition, a ground plate may be arranged between the contact rows to form a connector. An example of such a connector is a connector whose cross section is shown in FIG. The connector 5 is composed of a plug connector 51 and a receptacle connector 50 that can be fitted to each other. The plug connector 51 is provided with a plug housing 53, plug contacts 55 and 57, and a plug ground plate 59, and the receptacle connector 50 is provided with a receptacle housing 52, receptacle contacts 54 and 56, and a receptacle ground plate 58.

A receptacle gland plate 58 is attached to the central portion of the receptacle housing 52, and a tip part 58a thereof is formed in a bifurcated shape so as to receive a plug gland plate 59. A plug ground plate 59 is attached to the center of the plug housing 53.

When the receptacle connector 50 and the plug connector 51 thus configured are fitted together, both ground plates 58 and 59 are brought into a coupled state, and when both ends 58b and 59b of the ground plates are grounded, the receptacle contact holding member. 52b and the plug contact holding member 53c are dielectrics, the ground plates 58 and 59 are ground conductor surfaces, and the contacts 54 and 55 are conductor strips.
A strip line having 7 as a conductor strip is formed.

[0007]

The characteristic impedance of each strip line formed in the connector 5 having the above-described structure is determined by the width and thickness of each contact,
Also, the receptacle contact holding members 50b, 52
b and the thickness of the plug contact holding members 51c and 53c (dielectric thickness) changes.

In the connector 5, the thickness H1 of the dielectrics 50b and 52b between the receptacle contacts 54 and 56 and the ground plate 58, and the receptacle contact 56.
Since the thicknesses H2 of the dielectrics 50c and 52c between the ground plate 58 and the ground plate 58 are different, the characteristic impedances of the strip lines also differ.

For example, in a circuit as shown in FIG.
When Z1 is the impedance of the transmission line and Z2 is the impedance of the connector, the reflectance of the impedance Γ
Is represented by Γ = (Z2-Z1) / (Z2 + Z1).
That is, if Z1 = Z2 (if the characteristic impedances of the strip lines match), no reflection occurs, so that the signal transmission property is not hindered, but if impedance mismatch occurs, reflection occurs. However, when a signal is transmitted to each contact, the transmitted signal may be adversely affected.

In addition, in the connector 5 having the above-mentioned structure, a part of one ground plate 58 is bifurcated, and the other ground plate 59 is inserted between the two ground plates 58 for fitting. Therefore, the size of three ground plates is required between the opposing signal contacts 54, 56 and 55, 57, and the width W of the male and female connector housings in the fitted state becomes large, and the connector becomes large. There was also the problem of being lost.

The present invention has been made in view of the above problems, and it is a connector having a ground plate between opposing signal contacts, and impedances between the signal contacts can be matched. Moreover, it aims at providing a compact connector with a ground plate.

[0012]

In order to achieve the above object, in a connector with a ground plate according to the present invention, a plug connector and a receptacle housing which form a plug connector and a receptacle connector which can be fitted to each other are respectively provided. A plurality of plug contacts and a plurality of receptacle contacts are arranged extending in two rows in the longitudinal direction. A protrusion is formed on the plug housing, and the protrusion is received in the receiving space of the receptacle housing when the connector is fitted. Also,
A plug contact is placed outside the protrusion,
The receptacle contact is arranged in the receiving space so that when the connector is fitted, the plug contact is held in contact with the plug contact from both sides.

Then, between the plug contact rows in the plug housing, one plug ground plate formed at substantially the same height as the contacts is arranged to form a plug connector. If you do,
Since the planar ground plate is located in the center of the contacts arranged in two rows, grounding the ground plate can match the impedance of the opposing contacts and reduce the size of the connector. Can be formed.

Here, the plug gland plate is composed of a gland plate body located between the rows of plug contacts, and a receptacle gland plate contact portion extending outward from the gland plate body in the longitudinal direction. Receptacle ground plates may be provided at both ends in the longitudinal direction of the receptacle housing that come into contact with the receptacle ground plate contact portion in a state where the receptacle connector and the plug connector are fitted together. In the connector thus configured, the receptacle ground plate is not in contact with the main body of the ground plate, so that impedance mismatching does not occur and the ground plate can be grounded more reliably.

Further, contrary to the structure of the connector with a ground plate, a ground plate having a ground plate body may be provided in the receptacle connector. In this connector, a receptacle ground plate is arranged so as to project into the receiving space, and a receiving groove for receiving the receptacle ground plate is formed in the projecting portion of the plug housing. In this case, the height of the receptacle ground plate does not necessarily have to be substantially the same as the height of the receptacle contacts.

Also in the connector thus constructed, the impedance of the opposing contacts can be matched and the connector can be made small. Also, at a position where it does not contact the ground plate body,
If the plug ground plate is provided, the ground plate can be more surely grounded as described above.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a connector assembly 1 according to the present invention. The connector assembly 1 is composed of a plug connector 10 and a receptacle connector 20 that can be fitted to each other, and is formed in a rectangular shape extending in the left-right direction.

The plug connector 10 comprises a plug housing 11, a plurality of plug-side contacts 14 and 15 provided in the plug housing 11, and a single plug-side ground plate 12. In addition, as shown in FIG. 2, the receptacle connector 20 includes a receptacle housing 21 and a plurality of receptacle-side contacts 24, 25 provided in the receptacle housing 21.
And two receptacle-side ground plates 22 and 23.

First, the plug connector 10 will be described. The plug housing 11 includes a base portion 11 a and a fitting protrusion portion 11 b, and the fitting protrusion portion 11
Notches 11c, 11c are formed in b for alignment when the connector is fitted with the receptacle connector 20. On the bottom surface 11d of the base portion 11a, a ground plate insertion groove 11h for inserting a plug-side ground plate 12, which will be described in detail later, extends in the longitudinal direction and, at the center in the front-rear direction, the upper end surface 11f of the fitting protrusion 11b. It is formed to penetrate.

The bottom surface 11 is formed on the front and rear surfaces of the fitting protrusion 11b.
A contact holding groove 11g formed integrally with the contact insertion hole 11e formed in d is formed. The contact insertion hole 11e is formed in the same shape as the contact insertion hole 21e formed on the bottom surface 21d of the receptacle 20 shown above the plug 10 in FIG.

The plug housing 1 formed in this way
1, plug-side contacts 14 and 15 formed in a substantially L-shape by a conductive plate material having elasticity are arranged in two rows along the front and rear surfaces of the plug housing 11. For example, the plug-side contact 14 arranged on the rear side (front side in FIG. 1) of the plug housing 11 is inserted into the contact insertion hole 11e and is formed in a board contact formed by extending in the front-rear direction with a step in the up-down direction. The portion 14a projects in the front-rear direction from the front-rear surface of the base portion 11a, and the contact portion 14b formed by extending upward is positioned and held in the contact holding groove 11g. The front side of the plug housing 11 is also formed in the same manner, and the plug-side contact 15 is provided.

The plug side ground plate 12 inserted into the ground plate insertion groove 11h will be described with reference to FIG. The plug-side ground plate 12 extends in the up-down direction and extends in the left-right direction.
2a and left and right side plates (receptacle ground plate contact portions) 12b, 12 formed by bending the ground plate body 12a at right and left ends at right angles to the ground plate body 12a.
c, and substrate contact portions 12d and 12e formed at the lower ends of the left and right side plates 12b and 12c.

The ground plate main body portion 12a has a length in the vertical direction from the bottom surface 11d of the base portion 11a to the fitting projection portion 11b.
Is formed to have the same length as the upper end surface 11f. The length in the left-right direction is longer than the length between the left and right ends of the plug-side contacts 14 and 15 arranged in the left-right direction.

Left and right side plates 12b and 12c are integrally formed by connecting portions 12f and 12g at both left and right ends of the ground plate body 12a. The left and right side plates 12b and 12c may be separately formed so as to be connected to the ground plate body portion 12a in the state of being arranged in the plug housing 11. Substrate contact portions 12d and 12e are formed at the lower ends of the left and right side plates 12b and 12c, respectively, extending in the left-right direction and horizontally in the front-rear direction.

The plug-side ground plate 12 thus constructed is inserted into the ground plate insertion groove 11h from the bottom surface 11d of the base portion 11a. Here, the plug-side ground plate 12 is inserted until the upper end surface 12f of the ground plate main body portion 12a is flush with the upper end surface 11f of the fitting protrusion 11b. The plug-side ground plate 12 is inserted into the plug-side housing 11, and the board-contact portion 12d,
The bottom surface of 12e is formed so as to be flush with the bottom surface 11d of the base portion 11a.

The right and left side surfaces of the fitting protrusion 11b (see FIG. 1).
11i has a side plate fitting groove 11j formed therein, and in the state where the plug side ground plate 12 is inserted into the plug side housing 11, the left and right side surfaces 11i of the fitting protrusion 11b are shown. And left and right side plates 12b, 12
It is formed so as to be flush with the surface of c.

Next, the receptacle 20 will be described. A fitting groove 2 is formed in the center of the receptacle housing 21.
1a is formed, and a plurality of receptacle-side contacts 24, 25 are arranged facing each other along the inner peripheral surface of the fitting groove 21a in the front-rear direction. Further, the left and right receptacle-side ground plates 22, 2 are provided on the inner peripheral surface of the fitting groove 21a in the left-right direction.
3 are provided.

When the plug housing 11 is fitted, the notches 11c, 11c are formed at the left and right end portions of the rear inner peripheral surface (rear surface in FIG. 2) of the receptacle housing 21.
By aligning with the plug housing 11, the alignment protrusions 21c and 21c for aligning the fitting position of the receptacle housing 21 with the plug housing 11 are formed.

The upper end surface 21 of the receptacle housing 21
In d, a plurality of contact insertion holes 21e are formed at positions facing the contact insertion holes 11e at the time of fitting, and the receptacle-side contacts 24 and 25 are the same as the plug-side contacts 14 and 15 in the contact insertion holes 21e. Inserted in.

The receptacle contacts 24 and 25 are
Similar to the plug-side contacts 14 and 15, the conductive plate material having elasticity is used to form the substrate contact portions 24a and 25a and the arm portions (in FIG. 2, the rear side in FIG. 2) extending vertically from the substrate contact portions 24a and 25a. (Only the receptacle-side contact 24 is shown) 24b, and a contact portion 2 formed by projecting inward at the tip of the arm portion 24b.
4c.

Left and right receptacle side ground plates 22 and 23
Are formed independently of each other, but since the shapes thereof are symmetrical, the configuration of the left receptacle-side ground plate 22 will be described here. The ground plate 22 on the left receptacle side is a board contact portion 22 formed in a flat plate shape.
a, an arm portion 22b extending downward from the substrate contact portion 22a (upward in FIG. 2), and a contact portion 22c formed at the lower end of the arm portion 22b so as to project inward. ing. Note that the right receptacle-side ground plate 23 is denoted by the reference numeral added with 1, and description thereof will be omitted.

The left and right receptacle-side ground plates 22 and 23 configured as described above are provided in the receptacle housing 21.
Gland plate insertion grooves 21h formed near the left and right ends of the
21i are respectively inserted and held. The left and right receptacle-side ground plates 22 and 23 are formed such that the bottom surfaces of the board contact portions 22a and 23a are flush with the bottom surface 21d of the receptacle-side housing 21 in the inserted and held state.

When the plug 10 and the receptacle 20 thus formed are fitted to each other, the receptacle-side contact 2 is formed below the plug-side contacts 14 and 15 as shown in FIGS. 4 and 5.
Abutting contact with the contact portions 24c, 25c of 4, 25. Further, the contact portions 22c and 23c of the left and right receptacle-side ground plates 22 and 23 come into contact with the surfaces of the left and right side plates 12b and 12c, and the plug-side ground plate 12 and the left and right receptacle-side ground plates 22 and 23 are electrically connected.

In the connector 1 constructed as described above, when the plug 10 and the receptacle 20 are fitted to each other, the contacts 14, 24 and 15, 25 are formed.
The signal can be transmitted by conducting the signal. Also,
Since each of the ground plates 12, 22, and 23 is also integrated and disposed at the intermediate portion of the front and rear plug-side contacts 14 and 15, the ground between the opposing signal contacts 14, 24 and 15, 25 is provided. It can be performed.

Then, the substrates connected to the substrate contact portions 12d, 12e, 22a and 23a of the ground plates 12, 22, and 23 are grounded, so that the contacts 14 and 24 can be ground.
Alternatively, crosstalk of signals transmitted between 15 and 25 is prevented, and characteristic impedances are matched.

At this time, in the connector assembly 1, the fitting protrusion 11b is made of a dielectric material, and the ground plate 12,
22 and 23 are ground conductor surfaces, and each contact 1
A strip line having conductor strips 4, 24 and 15, 25 is formed. Here, in the connector 1 according to the present invention, since the thickness H of both sides of the ground plate body 12a in the fitting protrusion 11b, which is a dielectric, is the same, these lines (plug-side contact and receptacle-side contact) are formed. ) Can be made equal in characteristic impedance.

Therefore, when this connector assembly 1 is used in the circuit shown in FIG. 6, the circuit assembly (transmission line)
The characteristic impedance of the connector can be matched to the characteristic impedance of
Since reflection does not occur during signal transmission in 5, 25,
It does not adversely affect the signal being transmitted at the opposing contacts. Also, the plug side housing 11
Plug side ground plate 12 attached to the middle part of
Is flat, it is possible to reduce the width dimension of the connector assembly 1 at the time of fitting.

In the above embodiment, the plug housing 11 is provided with the plug side ground plate 12 having the ground plate body 12a, and the receptacle housing 21 is provided with the left and right receptacle side ground plates 22 and 23.
Although the present invention is not limited to this, the present invention is not limited to this, and the receptacle housing 21 is provided with the receptacle-side ground plate having the ground plate main body portion, and the plug-side ground plates are provided on the left and right of the plug housing 11. It may be configured to be provided.

In such a structure, the receptacle ground plate is arranged so as to project in the receiving space, and the receiving groove for receiving the receptacle ground plate is formed in the projecting portion of the plug housing. In this case, the height of the receptacle ground plate (downward length when formed in the state as shown in FIG. 4) does not necessarily have to be the same as the height (length) of the receptacle contact. Alternatively, it may be higher than the height of the receptacle contact.

Further, in any of the above-mentioned embodiments, the ground plate having the ground plate main body (the plug ground plate 12 in the above-mentioned embodiments) is arranged in the housing fitted to the housing. Ground plate (receptacle ground plates 22 and 23 in the above embodiment)
Need not necessarily be provided.

[0041]

As described above, in the connector with ground plate according to the present invention, the contact portions of the contacts arranged in two rows are brought into contact with each other while the plug housing and the receptacle housing are fitted to each other. In this state, since the ground plate provided with the ground plate main body formed to extend to the same height as each contact is located between the contact rows, in each contact arranged in two rows The distance between the ground plate and each contact is the same as the distance between the opposing contacts. Therefore, by grounding the ground plate, the characteristic impedance of the contacts during signal transmission can be made the same, and the width of the connector can be reduced because there is only one ground plate attached to the middle part of each connector housing. Can be made smaller.

Further, when the plug housing is provided with the ground plate, the receptacle housing is provided with the receptacle ground plate, and when the receptacle housing is provided with the ground plate, the plug housing is provided with the plug ground plate. As a result, the grounding of the connector can be more reliably obtained without causing impedance mismatch.

[Brief description of drawings]

FIG. 1 is a perspective view showing a connector according to the present invention.

FIG. 2 is a perspective view showing a receptacle housing of the connector.

FIG. 3 is a perspective view showing a ground plate of the connector.

FIG. 4 is a sectional view of the connector taken along the line IV-IV in FIG. 1.

5 is a cross-sectional view taken along line VV of FIG. 1 of the connector.

FIG. 6 is a circuit diagram using a connector according to the present invention.

FIG. 7 is a sectional view showing a conventional connector.

[Explanation of symbols]

 1 Connector 11 Plug Housing 12 Plug Ground Plate 21 Receptacle Housing 22, 23 Receptacle Ground Plate

Claims (4)

[Claims] 1. A connector with a ground plate, comprising a plug connector and a receptacle connector configured to be capable of being fitted to each other, wherein the plug connector has a plug housing having a projecting portion, and a longitudinal direction outside the projecting portion. A plurality of plug contacts that extend in two rows and a height that is substantially the same as the height of the plug contacts that extend in the longitudinal direction between the rows of plug contacts in the protrusion. A single plug gland plate, wherein the receptacle connector has a receptacle housing having a receiving space for receiving the protrusion, and the plug contacts are provided on both sides in a state where the plug connector and the receptacle connector are fitted to each other. Two rows in the longitudinal direction in the receiving space so as to be in abutting contact with the plug contact by sandwiching Grand fitted with connectors, characterized in that it consists of a plurality of receptacle contacts arranged to extend. 2. The plug gland plate includes a gland plate body portion located between the rows of the plug contacts, and a receptacle gland plate contact portion extending outward from the ground plate body portion in the longitudinal direction. , Receptacle gland plates that are in contact with the receptacle gland plate contact portion in a state where the receptacle connector and the plug connector are fitted to each other are provided at both ends in a longitudinal direction of the receptacle housing. The connector with a ground plate according to Item 1. 3. A connector with a ground plate, which comprises a plug connector and a receptacle connector that can be fitted to each other, wherein the receptacle connector has a receptacle housing having a receiving space, and a longitudinal direction within the receiving space of the receptacle housing. A plurality of receptacle contacts arranged to extend in two rows in a direction, and a single receptacle ground plate projecting into the receiving space and arranged to extend in the longitudinal direction between the rows of the receptacle contacts, The plug connector has a receiving groove formed to receive the receptacle ground plate and has a protruding portion to be inserted into the receiving space; and the receptacle in a state where the plug connector and the receptacle connector are fitted to each other. The receptor is sandwiched between contacts on both sides. Grand fitted with connectors, characterized in that it consists of a plurality of plug contacts which outside of the protruding portion is disposed to extend in two rows to Le contacts and the abutting contact. 4. The receptacle gland plate includes a gland plate body portion located between the rows of the receptacle contacts, and a plug gland plate contact portion extending in the longitudinal direction from the gland plate body portion, The plug gland plates that come into contact with the plug gland plate contact portion in a state where the receptacle connector and the plug connector are fitted to each other are provided at both ends in the longitudinal direction of the plug housing. The connector with a ground plate described in 3.