JP4234714B2 - Connector and connector assembly - Google Patents

Description

  The present invention relates to a connector having a shield structure and a connector assembly.

  Conventionally, a connector assembly including a plug connector and a receptacle connector is known as means for connecting two printed wiring boards to each other (see, for example, Patent Document 1).

  The connector assembly of Patent Document 1 is arranged so that a pair of high-speed signal contacts are sandwiched between a pair of ground contacts only in the plug connector in order to obtain a sufficient shielding effect with either shield structure of the plug connector or the receptacle connector. However, the receptacle connector has a configuration that surrounds the periphery of the housing of the receptacle connector with a high-frequency shield member that is electrically connected to the ground contact of the plug connector.

JP-A-2005-71769

  In the connector assembly described in Patent Document 1, the characteristic impedance of the signal contact is roughly determined by the positional relationship between the signal contact and the ground contact. Therefore, there is a problem that variation is likely to occur and impedance matching is difficult to take. .

  Therefore, an object of the present invention is to provide a connector that can obtain stable characteristic impedance and that facilitates impedance matching, and a connector assembly using the connector.

The present invention provides the first connector as
A housing;
At least one signal contact held in the housing;
At least a pair of ground contacts held in the housing so as to sandwich the signal contact in the first direction;
A connector provided with a ground plate held in the housing so as to face the signal contact and the ground contact in a second direction orthogonal to the first direction and electrically connected to the ground contact; There,
The shortest distance between the signal contact and the ground plate is shorter than the shortest distance between the signal contact and the ground contact within a predetermined plane defined by the first direction and the second direction. Provide a connector.

The present invention provides the first connector as the second connector,
The ground plate includes a plurality of tongue pieces formed by cutting a plurality of U-shaped cuts at positions corresponding to the pair of ground contacts in the second direction and bending the same toward the ground contact. The connector is electrically connected to the ground contact by bringing the plurality of tongue pieces into contact with the ground contact.

Moreover, the present invention provides the third connector as the third connector,
Two contact rows including the signal contact and the pair of ground contacts;
The ground plates corresponding to the signal contacts and the pair of ground contacts included in one contact row are the ground plates corresponding to the signal contacts and the pair of ground contacts included in the remaining one contact row. And a connector provided separately.

Furthermore, the present invention provides the fourth connector as any one of the first to third connectors,
The pair of ground contacts are arranged so as to sandwich the pair of signal contacts in the first direction,
The pair of signal contacts are for transmitting a differential pair signal in differential transmission, and are electrically shielded from other signal contacts provided on the connector by the pair of ground contacts and the ground plate. Provide a connector.

Further, the present invention provides a first connector assembly,
A plug connector having a convex fitting portion protruding in a third direction orthogonal to the first direction and the second direction; and a concave fitting portion for receiving the convex fitting portion along the third direction. A connector assembly comprising a receptacle connector having:
The plug connector is any one of the first to fourth connectors, and the housing has a shape that defines an appearance of the convex fitting portion,
The receptacle connector is any one of the first to fourth connectors, wherein the housing has a shape defining an appearance of the concave fitting portion.

Further, the present invention provides the first connector assembly as a second connector assembly,
One of the signal contact and the ground contact of the plug connector or one of the signal contact and the ground contact of the receptacle connector protrudes partially in the second direction, and the corresponding plug connector or receptacle connector. Of the housing,
The signal contact and the ground contact of the plug connector or the other of the signal contact and the ground contact of the receptacle connector can be contacted in the second direction with the one partially protruding in the second direction. Is held in the housing of the corresponding plug connector or the receptacle connector,
The ground plate of the plug connector and the ground plate of the receptacle connector are the signal contact and the ground contact of the plug connector and the signal contact of the receptacle connector when the plug connector and the receptacle connector are in a fitted state. And the ground contact is disposed so as to sandwich the second contact in the second direction,
In the predetermined plane, the signal contact of the plug connector and the signal contact of the receptacle connector are the ground plate and the pair of ground contacts of the plug connector, and the ground plate and the pair of ground contacts of the receptacle connector. To provide an enclosed connector assembly.

  The ground plate in the first connector of the present invention is held inside the housing, not around the housing or outside the housing, and the shortest distance between the signal contact and the ground plate is between the signal contact and the ground contact. It is arranged to be shorter than the shortest distance. Therefore, in the first connector of the present invention, the characteristic impedance relating to the signal contact is mainly determined by the positional relationship between the signal contact and the ground plate, so that a stable characteristic impedance is obtained and impedance matching is facilitated.

  In the second connector of the present invention, the plurality of tongue pieces provided on the ground plate are brought into contact with the ground contact, thereby achieving electrical connection between the ground plate and the ground contact. It has been strengthened.

  In the third connector of the present invention, with respect to the signal contacts located between the ground plates, the ground plate is not shared between the signal contacts, but a ground plate is provided for each signal contact, so that the housing The distance between the ground plate and the corresponding signal contact can be shortened while maintaining the strength of.

  In the fourth connector of the present invention, a connector having signal contacts suitable for differential transmission can be obtained.

  In the first connector assembly of the present invention, the effects of any of the first to fourth connectors can be enjoyed.

  In particular, in the second connector assembly of the present invention, the signal contact of the plug connector and the signal contact of the receptacle connector are within a predetermined plane, the ground plate and the pair of ground contacts of the plug connector, the ground plate of the receptacle connector and the pair of pairs of contacts. Surrounded by a ground contact. Therefore, high shielding characteristics are realized, and the problem of crosstalk is reduced.

  As shown in FIG. 1, the connector assembly according to the embodiment of the present invention includes a plug connector 100 having a convex fitting portion 101 and a receptacle connector having a concave fitting portion 201 that receives the convex fitting portion 101. 200.

  As shown in FIGS. 1 and 8, the plug connector 100 includes an insulating housing 110 that defines the appearance of the convex fitting portion 101, a ground plate 120, a ground contact 131, a signal contact 132 for high speed transmission, and a low speed transmission. And a plurality of contact rows made up of signal signal contacts 133. The pair of adjacent high-speed transmission signal contacts 132 in the contact row is for transmitting a differential pair signal in differential transmission. If single-ended transmission is also applied to high-speed transmission, The pair of signal contacts 132 for high-speed transmission and the members / parts provided in pairs corresponding thereto may be made single.

  As best shown in FIG. 8, two rows of contact accommodating portions 111 to 113 are formed on the lower surface of the insulating housing 110 in the Z direction. Among these, the contact accommodating portion 111 accommodates the ground contact 131, the contact accommodating portion 112 accommodates the high-speed transmission signal contact 132, and the contact accommodating portion 113 includes the low-speed transmission signal contact 133. Is to be accommodated.

  As can be understood from FIGS. 1 and 8, the contact accommodating portions 111 to 113 are grooves formed on the side surface of a portion (hereinafter referred to as “convex portion”) constituting the convex fitting portion of the insulating housing 110. And a hole penetrating a pedestal portion of the convex portion (hereinafter referred to as “pedestal portion”), and extends straight in the Z direction.

  In FIG. 8, when viewed from the lower side in the Z direction, each of the contact accommodating portions 111 to 113 has a turret model shape (convex shape) protruding outward in the Y direction. That is, the two contact accommodating portions 111 to 113 corresponding to each other in the Y direction are formed so that the appearance of the turret model shape is back to back.

  As can be understood from FIGS. 1, 8, 2, and 5, the tip of the cannon in the turret model shape reaches the side surface of the convex portion of the insulating housing 110. Is accessible from the outside of the convex portion of the insulating housing 110 in the Y direction.

  The contact accommodating portions 111 to 113 in each row are regularly arranged in the X direction, as is apparent from the lower side in the Z direction. More specifically, in each row, in each row, the contact accommodating portion 111, the pair of contact accommodating portions 112, the contact accommodating portion 111, the eight contact accommodating portions 113, the contact accommodating portion 111, and the pair of contact accommodating portions 112. The contact accommodating portions 111 are arranged in this order. In the X direction, the two contact accommodating portions 111 formed so as to sandwich the pair of contact accommodating portions 112 form a pair, and the pair of contact accommodating portions 111 and the pair of contact accommodating portions 112 are arranged in the Y direction inside. A ground plate housing portion 117 for housing the ground plate 120 is formed.

  As apparent from FIGS. 1, 2, 5, and 8, the ground plate accommodating portion 117 has a slit shape and penetrates the insulating housing 110 in the Z direction. When the pair of contact accommodating portions 111 and the pair of contact accommodating portions 112 sandwiched between them are considered as one set of contact accommodating portions, as can be understood from FIG. A contact housing portion is formed, and a separate ground plate housing portion 117 is provided so as to correspond to each of these sets. In other words, the insulating housing 110 according to the present embodiment is provided with four ground plate accommodating portions 117 separately from each other.

  As can be understood from FIGS. 5 and 8, each ground plate accommodation portion 117 and a pair of contact accommodation portions 111 corresponding thereto are communicated in the Y direction by the communication portion 119.

  In the insulating housing 110 according to the present embodiment, the thickness between the ground plate housing portion 117 and the contact housing portion 112 is smaller than the thickness between the contact housing portion 112 and the contact housing portion 111 adjacent thereto.

  As shown in FIGS. 8 and 9, the ground plate 120 has a generally flat plate shape, and a tongue piece portion 122 formed by cutting and bending in a U-shape is formed on the surface of the ground plate 120. A plurality of press-fit portions 124 are formed in the vicinity of the four corners of the ground plate 120 so as to protrude outward in the X direction. In the present embodiment, two rows of tongue pieces 122 each including five rows of tongue pieces 122 are provided at intervals in the X direction. The interval between the rows of the tongue pieces 122 corresponds to the interval between the corresponding pair of contact accommodating portions 111 in the X direction, more specifically, the interval between the corresponding communicating portions 119. The ground plate 120 is inserted along the Z direction into the ground plate housing portion 117 so that the tongue piece portion 122 faces outward in the Y direction. At this time, the tongue piece 122 moves in the communication portion 119. It should be noted that once the ground plate accommodating portion 117 is inserted, the ground plate 120 does not fall off naturally due to the action of the press-fit portion 124.

  As understood from FIG. 8, the ground contact 131, the high-speed transmission signal contact 132, and the low-speed transmission signal contact 133 in the present embodiment are composed of the same members and the same shape and are generally long in the Z direction. The side portion has a short side portion in the Y direction, and has a shape exhibiting an L shape in the YZ plane.

  In this embodiment, there are two contact rows, and in each of the X directions, a ground contact 131, a pair of high-speed transmission signal contacts 132, a ground contact 131, eight low-speed transmission signal contacts 133, a ground contact 131, and a pair of contacts. The high-speed transmission signal contact 132 and the ground contact 131 are arranged in this order. The ground contact 131, the high-speed transmission signal contact 132, and the low-speed transmission signal contact 133 in each column are back-to-back in the Y direction with the ground contact 131, the high-speed transmission signal contact 132, and the low-speed transmission signal contact 133 in the other columns. It is arranged to become.

  As shown in FIG. 9, the ground contact 131 includes a tip 131a, a press-fitting part 131b, a main part 131c extending straight in the Z direction, a press-fitting part 131d, and bent parts 131e, Y bent from the press-fitting part 131d in the Y direction. A solder part 131f extending in the direction is provided. The tip 131a to the press-fitting portion 131d are inserted from the lower side in the Z direction of the insulating housing 110 into the portion corresponding to the turret model shape of the contact accommodating portion 111 (the convex rear portion: the portion opposite to the turret). Is done. Once the ground contact 131 is accommodated in the contact accommodating portion 111, it is naturally generated by the action of the press-fit portion 131b provided closer to the tip portion 131a and the press-fit portion 131d located near the lower surface of the insulating housing 110. It will not fall out. As described above, the high-speed transmission signal contact 132 and the low-speed transmission signal contact 133 have the same shape as the ground contact 131, and the contact accommodating portions 112 and 113 also have the same shape as the contact accommodating portion 111. Therefore, the high-speed transmission signal contact 132 and the low-speed transmission signal contact 133 are also appropriately held by the insulating housing 110.

  In addition, as understood from FIGS. 5 and 9, the ground contact 131 is in electrical contact with the tongue piece portion 122 of the ground plate 120 while being held in the contact housing portion 111.

  Here, as described above, in the insulating housing 110 in the present embodiment, the thickness between the ground plate housing portion 117 and the contact housing portion 112 is such that the contact housing portion 112 and the contact housing portion 111 adjacent thereto are adjacent to each other. Accordingly, the shortest distance between the high-speed transmission signal contact 132 and the ground plate 120 is shorter than the shortest distance between the high-speed transmission signal contact 132 and the ground contact 131. Become. Therefore, the characteristic impedance of the transmission line for high-speed transmission is determined by the microstrip line constituted by the high-speed transmission signal contact 132, the ground plate 120, and the insulating housing 110 sandwiched between them, and the position of the ground contact 131 has the characteristic impedance. It will no longer be a major factor to decide. Therefore, a stable characteristic impedance can be obtained.

  As shown in FIGS. 1 and 10, the receptacle connector 200 includes an insulating housing 210 that defines an appearance of the concave fitting portion 201, a ground plate 220, a ground contact 231, a high-speed transmission signal contact 232, and a low-speed transmission. And a plurality of contact rows composed of signal contacts 233.

  As best shown in FIG. 10, two rows of contact accommodating portions 211 to 213 are formed on the upper surface in the Z direction of the insulating housing 210. Among these, the contact accommodating portion 211 accommodates the ground contact 231, the contact accommodating portion 212 accommodates the high-speed transmission signal contact 232, and the contact accommodating portion 213 includes the low-speed transmission signal contact 233. Is to be accommodated.

  As can be understood from FIGS. 1 and 10, the contact accommodating portions 211 to 213 extend in the Z direction from the upper surface 210 a in an inverted U shape or a U-shaped shape that opens downward in the insulating housing 210. And two portions extending in the X direction, that is, two portions facing each other in the Y direction.

  In FIG. 10, when viewed from the upper and lower sides in the Z direction, each of the contact accommodating portions 211 to 213 has a turret model shape (convex shape) having a long cannon portion protruding inward in the Y direction. That is, the two contact accommodating portions 211 to 213 corresponding in the Y direction are formed so as to face the cannon portion in the turret model shape.

  As can be understood from FIGS. 1, 10, 3, and 6, the tip of the cannon in the turret model shape communicates with the space 210 b inside the insulating housing 210, that is, the inner surface of the insulating housing 210. Has reached. Accordingly, the contact accommodating portions 211 to 213 can be accessed from the space 210 b, that is, the inner side of the insulating housing 210 in the Y direction.

  The arrangement of the contact accommodating portions 211 to 213 in each row in the X direction is the same as the contact accommodating portions 111 to 113 in the plug connector 100. A ground plate housing portion 217 for housing the ground plate 220 is formed outside the pair of contact housing portions 211 and the pair of contact housing portions 212 in the Y direction.

  As is apparent from FIGS. 1, 3, 6, and 10, the ground plate accommodating portion 217 has a slit shape extending from the upper surface 210a of the insulating housing 210 in the Z direction. In FIG. 3, the insulating housing 210 is not penetrated. When the pair of contact accommodating portions 211 and the pair of contact accommodating portions 212 sandwiched between them are considered as one set of contact accommodating portions, as is understood from FIG. Contact accommodating portions are formed, and separate ground plate accommodating portions 217 are provided so as to correspond to the respective sets.

  As can be understood from FIGS. 6 and 10, each ground plate accommodating portion 217 and a pair of contact accommodating portions 211 corresponding thereto are communicated in the Y direction by the communicating portion 219.

  In insulating housing 210 in the present embodiment, similarly to insulating housing 110, the thickness between ground plate housing portion 217 and contact housing portion 212 is between contact housing portion 212 and contact housing portion 211 adjacent thereto. Thinner than the thickness.

  As shown in FIGS. 10 and 11, the ground plate 220 generally has a shape similar to that of the ground plate 120. In addition to having a general planar shape, the ground plate 220 includes a plurality of tongue pieces 222, Although it has press-fit portions 224 provided in the vicinity of the four corners, the length in the Z direction is shorter than that of the ground plate 120. Therefore, in the ground plate 220, the number of tongue pieces 222 constituting one row is three. Only a total of six tongue pieces 222 are formed. The interval between the rows of the tongue pieces 222 corresponds to the interval between the communication portions 219. The ground plate 220 is inserted along the Z direction into the ground plate accommodating portion 217 so that the tongue piece 222 faces the Y direction inside. At this time, the tongue piece portion 222 moves in the communication portion 219. It should be noted that once the ground plate accommodating portion 217 is inserted, the ground plate 220 does not fall off naturally due to the action of the press-fit portion 224.

  As understood from FIG. 10, the ground contact 231, the high-speed transmission signal contact 232, and the low-speed transmission signal contact 233 in the present embodiment have the same members and the same shape. The arrangement of the ground contact 231, the high-speed transmission signal contact 232, and the low-speed transmission signal contact 233 is the same as the arrangement of the ground contact 131, the high-speed transmission signal contact 132, and the low-speed transmission signal contact 133. The ground contact 231, the high-speed transmission signal contact 232, and the low-speed transmission signal contact 233 in each column are back-to-back in the Y direction with the ground contact 231, the high-speed transmission signal contact 232, and the low-speed transmission signal contact 233 in the other columns. It is arranged to become.

  11, the ground contact 231 includes a solder portion 231a extending in the Y direction, a bent portion 231b bent in the Z direction from the solder portion 231a, a press-fit portion 231c, a main portion 231d extending straight in the Z direction, and a press-fit. A portion 231e, a spring portion 231f that is bent so as to be folded back and applied with an elastic force, and a contact portion 231g that contacts the ground contact 131 are provided. From the press-fit portion 231c to the press-fit portion 231e, the spring portion 231f and the contact portion 231g are in contrast to the portion corresponding to the turret model-shaped base portion of the contact accommodating portion 211 (the convex rear portion: the portion opposite to the turret). The portion corresponding to the turret of the contact accommodating portion 211 is inserted from the upper side of the insulating housing 210 in the Z direction.

  As is clear from FIGS. 1, 3, and 6, the contact portion 231 g of the ground contact 231 protrudes inward in the Y direction of the concave fitting portion 201. In addition, once the ground contact 231 is accommodated in the contact accommodating part 211, it does not fall out naturally by the action of the two press-fit parts 231c and 231e. As described above, the high-speed transmission signal contact 232 and the low-speed transmission signal contact 233 have the same shape as the ground contact 231, and the contact accommodating portions 212 and 213 also have the same shape as the contact accommodating portion 211. Therefore, the high-speed transmission signal contact 232 and the low-speed transmission signal contact 233 are also appropriately held by the insulating housing 210.

  In addition, as understood from FIGS. 6, 10, and 11, the ground contact 231 is in electrical contact with the tongue piece 222 of the ground plate 220 while being held in the contact accommodating portion 111. .

  Here, as described above, in the insulating housing 210 according to the present embodiment, the thickness between the ground plate housing portion 217 and the contact housing portion 212 is such that the contact housing portion 212 and the contact housing portion 211 adjacent thereto are adjacent to each other. Accordingly, the shortest distance between the high-speed transmission signal contact 232 and the ground plate 220 is shorter than the shortest distance between the high-speed transmission signal contact 232 and the ground contact 231. Become. Therefore, the characteristic impedance of the transmission line for high-speed transmission is determined by the microstrip line constituted by the signal contact 232 for high-speed transmission, the ground plate 220, and the insulating housing 210 sandwiched between them, and the position of the ground contact 231 has the characteristic impedance. It will no longer be a major factor to decide. Therefore, a stable characteristic impedance can be obtained.

  When the plug connector 100 and the receptacle connector 200 having such a configuration are fitted, the contact of the ground contact 231 protruding inward in the Y direction of the concave fitting portion 201 is understood from FIGS. 1, 4, and 7. The portion 231g, the contact portion of the high-speed transmission signal contact 232, and the contact portion of the low-speed transmission signal contact 233 are the main portion 131c of the ground contact 131, the main portion of the high-speed transmission signal contact 132, and the main portion of the low-speed transmission signal contact 133. The two connectors 100 and 200 are connected by sliding on the part.

  In this fitted state, the ground plate 120 of the plug connector 100 and the ground plate 220 of the receptacle connector 200 are the ground contact 131 and the high-speed transmission signal contact 132 of the plug connector 100, the ground contact 231 and the high-speed transmission signal of the receptacle connector 200. The contacts 232 are arranged so as to sandwich the Y direction. Therefore, the pair of high-speed transmission signal contacts 132 and the pair of high-speed transmission signal contacts 232 connected to each other include the ground plate 120, the pair of ground contacts 131, the pair of ground contacts 231 and the ground plate 220 in the XY plane. A high shielding effect can be obtained.

1 is an exploded perspective view showing a connector assembly according to an embodiment of the present invention, in which a plug connector and a receptacle connector are in a detached state. It is sectional drawing along the II-II line of the plug connector shown by FIG. It is sectional drawing along the III-III line of the receptacle connector shown by FIG. FIG. 4 is a cross-sectional view showing a state in which the plug connector shown in FIG. 2 and the receptacle connector shown in FIG. 3 are fitted. It is sectional drawing along the VV line of the plug connector shown by FIG. It is sectional drawing along the VI-VI line of the receptacle connector shown by FIG. FIG. 7 is a cross-sectional view showing a state in which the plug connector shown in FIG. 5 and the receptacle connector shown in FIG. 6 are fitted. FIG. 2 is an exploded perspective view when the plug connector shown in FIG. 1 is viewed from an obliquely downward direction. It is a figure which shows the relationship between the ground plate shown in FIG. 8, the signal contact for high-speed transmission, and a ground contact. FIG. 2 is an exploded perspective view when the receptacle connector shown in FIG. 1 is viewed from an upper oblique direction. It is a figure which shows the relationship between the ground plate shown in FIG. 10, the signal contact for high-speed transmission, and a ground contact.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Plug connector 101 Convex fitting part 110 Insulating housing 111 Contact accommodating part 112 Contact accommodating part 113 Contact accommodating part 117 Contact accommodating part 117 Ground plate accommodating part 119 Communication part 120 Ground plate 122 Tongue piece part 124 Press fit part 131 Ground contact 131a Tip part 131b Press fit Part 131c Main part 131d Press fit part 131e Bending part 131f Solder part 132 Signal contact for high speed transmission 133 Signal contact for low speed transmission 200 Receptacle connector 201 Concave fitting part 210 Insulating housing 211 Contact accommodating part 212 Contact accommodating part 213 Contact accommodating part 217 Ground Plate housing portion 219 Communication portion 220 Ground plate 222 Tongue piece portion 224 Press-fit portion 231 Ground contact 231a Solder part 231b Bent part 231c Press-fit part 231d Main part 231e Press-fit part 231f Spring part 231g Contact part 232 Signal contact for high-speed transmission 233 Signal contact for low-speed transmission

Claims (5)

A housing;
At least one signal contact held in the housing;
At least a pair of ground contacts held in the housing so as to sandwich the signal contact in the first direction;
A connector provided with a ground plate held in the housing so as to face the signal contact and the ground contact in a second direction orthogonal to the first direction and electrically connected to the ground contact; There,
In a predetermined plane defined by the first direction and the second direction, the shortest distance between the signal contact and the ground plate is shorter than the shortest distance between the signal contact and the ground contact. The
The ground plate includes a plurality of tongue pieces formed by cutting a plurality of U-shaped cuts at positions corresponding to the pair of ground contacts in the second direction and bending the same toward the ground contact. And having the plurality of tongue pieces abutted against the ground contact, thereby being electrically connected to the ground contact.
connector. Two contact rows including the signal contact and the pair of ground contacts;
The ground plates corresponding to the signal contacts and the pair of ground contacts included in one contact row are the ground plates corresponding to the signal contacts and the pair of ground contacts included in the remaining one contact row. And is provided separately
The connector according to claim 1 . The pair of ground contacts are arranged so as to sandwich the pair of signal contacts in the first direction,
The pair of signal contacts are for transmitting a differential pair signal in differential transmission, and are electrically shielded from other signal contacts provided on the connector by the pair of ground contacts and the ground plate. ing
The connector according to claim 1 or claim 2 . A plug connector having a convex fitting portion protruding in a third direction orthogonal to the first direction and the second direction; and a concave fitting portion for receiving the convex fitting portion along the third direction. A connector assembly comprising a receptacle connector having:
The plug connector according to any one of claims 1 to 3 , wherein the housing has a shape that defines an appearance of the convex fitting portion,
The receptacle connector, the connector according to any one of claims 1 to 3 state, and are not shaped to the housing defines an overview of the recessed fitting portion,
One of the signal contact and the ground contact of the plug connector or one of the signal contact and the ground contact of the receptacle connector protrudes partially in the second direction, and the corresponding plug connector or receptacle connector. Of the housing,
The signal contact and the ground contact of the plug connector or the other of the signal contact and the ground contact of the receptacle connector can be contacted in the second direction with the one partially protruding in the second direction. Is held in the housing of the corresponding plug connector or the receptacle connector,
The ground plate of the plug connector and the ground plate of the receptacle connector are the signal contact and the ground contact of the plug connector and the signal contact of the receptacle connector when the plug connector and the receptacle connector are in a fitted state. And the ground contact is disposed so as to sandwich the second contact in the second direction,
In the predetermined plane, the signal contact of the plug connector and the signal contact of the receptacle connector are the ground plate and the pair of ground contacts of the plug connector, and the ground plate and the pair of ground contacts of the receptacle connector. And surrounded by
Connector assembly. A plug connector having a convex fitting portion protruding in a third direction perpendicular to the first direction and a second direction perpendicular to the first direction, and the convex fitting portion along the third direction A connector assembly comprising a receptacle connector having a recessed fitting portion for receiving,
The plug connector includes a plug-side housing having a shape defining an appearance of the convex fitting portion, at least one plug-side signal contact held by the plug-side housing, and the plug side in the first direction. At least a pair of plug-side ground contacts held in the plug-side housing so as to sandwich the signal contacts, and in the plug-side housing so as to face the plug-side signal contacts and the plug-side ground contacts in the second direction. A plug-side ground plate that is held and electrically connected to the plug-side ground contact, and the plug-side signal is within a predetermined plane defined by the first direction and the second direction. Shortest distance between contact and plug-side ground plate Away is shorter than the shortest distance between the plug-side ground contacts and the plug-side signal contacts,
The receptacle connector includes a receptacle-side housing having a shape defining an appearance of the concave fitting portion, at least one receptacle-side signal contact held by the receptacle-side housing, and the receptacle-side signal in the first direction. At least a pair of receptacle-side ground contacts held in the receptacle-side housing so as to sandwich the contacts, and held in the receptacle-side housing so as to face the receptacle-side signal contacts and the receptacle-side ground contacts in the second direction. And a receptacle-side ground plate that is electrically connected to the receptacle-side ground contact, and is within a predetermined plane defined by the first direction and the second direction. , The shortest distance between the receptacle-side signal contact and the receptacle-side ground plate is shorter than the shortest distance between the receptacle-side ground contacts and the receptacle-side signal contacts,
One of the plug-side signal contact and the plug-side ground contact or the receptacle-side signal contact and the receptacle-side ground contact projects so as to partially protrude in the second direction, and the corresponding plug connector or receptacle connector. Of the housing,
The other of the plug-side signal contact and the plug-side ground contact of the plug connector or the receptacle-side signal contact and the receptacle-side ground contact of the receptacle connector includes the one protruding partly in the second direction and the one It is held in the receptacle-side housing of the corresponding plug connector or the receptacle connector so as to be contactable in the second direction,
The plug-side ground plate of the plug connector and the receptacle-side ground plate of the receptacle connector have the plug-side signal contact and the plug-side ground contact of the plug connector in a fitted state of the plug connector and the receptacle connector. And the receptacle-side signal contact and the receptacle-side ground contact of the receptacle connector are arranged so as to be sandwiched in the second direction,
The plug-side signal contact of the plug connector and the receptacle-side signal contact of the receptacle connector are within the predetermined plane, the plug-side ground plate of the plug connector and the pair of plug-side ground contacts and the receptacle connector of the receptacle connector. A connector assembly surrounded by a receptacle-side ground plate and the pair of receptacle-side ground contacts.

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