CN113346292B

CN113346292B - Socket shielding sheet, electric connection part and socket

Info

Publication number: CN113346292B
Application number: CN202110598898.7A
Authority: CN
Inventors: 牛林
Original assignee: Shenzhen West Point Precision Technology Co ltd
Current assignee: Shenzhen West Point Precision Technology Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2025-12-09
Anticipated expiration: 2041-05-31
Also published as: CN113346292A

Abstract

The application provides a socket shielding sheet which comprises shielding groups arranged at intervals, wherein each shielding group comprises a first end electrically contacted with a plug, a second end formed by extending the first end along a preset direction and connected with a circuit substrate, and middle parts connecting the first end and the second end, the middle parts of different shielding groups are positioned on the same shielding substrate, each middle part comprises a plurality of wing parts arranged at intervals along the preset direction, one end of each wing part is fixed to the middle part, the other end of each wing part is movable relative to the middle part and bendable to a preset height relative to the surface of the middle part, and concave spaces defined by the wing parts opposite to each other on two adjacent shielding groups and the middle part are base shells of a socket signal group. The shielding sheet has the effects of resisting signal group crosstalk and controlling resonance on a reflux path, and the shielding sheet based on the design is convenient to process and good in consistency among shielding groups, and further provides an electric connection part and a socket comprising the shielding sheet.

Description

Socket shielding sheet, electric connection part and socket

Technical Field

The present application relates to the field of communications devices, and in particular, to a socket shielding plate, an electrical connection portion, and a socket.

Background

The connector is used for supporting a bridge communicated between circuit substrates at a blocked position or between isolated and non-communicated circuits in the circuit, so that current flows, and the circuit achieves a preset function. Because of the increased bandwidth requirements of communication terminals such as switches, routers, modems, subscriber access terminal devices, etc., higher demands are placed on the high rate transmission of connector signals and signal integrity (SIGNAL INTEGRITY). In the high-speed butting connector (Docking Connector), differential signals are widely used with good anti-interference performance, and a common back board connector generally comprises signal groups arranged on an insulating base at intervals, shielding groups are arranged between adjacent signal groups, and a plurality of shielding groups form a shielding sheet. Each signal group generally comprises two signal terminals, the signal terminals are differential signal terminals and are used for transmitting differential signals, the shielding groups are used for shielding the differential signals transmitted by two adjacent signal groups, and the shielding groups and the signal groups are arranged in a staggered manner, so that the shielding effect between the transmitted signals can be achieved, and a return path is provided for the transmitted signals.

With the increasing rate of signal transmission, higher demands are being placed on the integrity of the transmitted signal, the most critical of the high-speed electrical performance metrics of the connector are crosstalk, loss and reflection. In particular, the current connector rate evolves to 56Gbps to 112Gbps, and the problem of crosstalk is particularly pronounced. Therefore, the specific design of the shielding group and the shielding sheet is important.

To solve the problem of crosstalk. In the prior art, a plurality of rib-shaped bulges (bulges) are formed on a shielding substrate along the extending direction of the shielding group by punching, as shown in fig. 1, a signal group is arranged in a concave shielding cavity defined by adjacent bulges, so that signal interference of adjacent signal groups is isolated, and meanwhile, as each shielding group is positioned on the same shielding substrate and communicated with each other, a shielding sheet formed by the shielding groups has good signal backflow. However, the lengths of the protrusions corresponding to different shielding groups are different, the heights of the protrusions among the different shielding groups are inconsistent easily due to the integral stamping process, and the problems of cracks and stretching of the shielding substrate near the protrusions are easily caused, so that the uncertainty of impedance on a reflow path is generated, the fluctuation of shielding performance is caused, and the transmission performance is influenced. In addition, the whole surface of the shielding sheet is in a wavy non-plane shape, and the non-plane shape is not beneficial to reducing loop self-inductance and controlling resonance as a signal return path.

In order to solve the uncertainty generated in the above-mentioned bump processing technology, in the prior art, a whole cutting groove extending from a first end to a second end is cut and formed on a shielding substrate along the extending direction of a shielding group, a baffle plate-shaped baffle plate is formed by lifting the cutting groove, and a socket signal group is installed in a concave space defined by adjacent baffle plates. I.e. the protrusions in the prior art of fig. 1 are replaced by the blocking sheets, although the scheme can realize electromagnetic shielding isolation between adjacent socket signal groups, signals between adjacent shielding groups are not communicated, and the single signal return path is not beneficial to controlling resonance.

Based on the above, in the prior art, the design of the shielding sheet has the problems that the non-uniformity exists due to the processing technology, the capability of controlling resonance is weak due to fluctuation of the shielding sheet, the resonance cannot be controlled due to the fact that the signal return path of the planar shielding sheet is less, or the shielding cavity and the return current path of the formed signal group are not in the same shielding sheet.

Disclosure of Invention

Based on the above, the present invention provides a planar shielding based socket shielding sheet, which can at least solve the problems mentioned in the prior art.

In a first aspect, a socket shielding sheet is provided, including shielding groups disposed at intervals, each shielding group including a first end electrically contacting a plug, a second end formed by extending the first end along a predetermined direction, and an intermediate portion connecting the first end and the second end, each intermediate portion including a plurality of wing portions arranged at intervals along the predetermined direction, wherein one end of each wing portion is fixed on the intermediate portion by cutting the intermediate portion, and the other end of each wing portion is separated from a surface of the intermediate portion and bendable to a predetermined height relative to the surface of the intermediate portion, and recess spaces defined by the opposite wing portions and the intermediate portion on two adjacent shielding groups are mounted for a socket signal group.

In this scheme, on the one hand, because the wing portion of adjacent shielding group is higher than the surface that the mid portion is located, its recess space that is shared with the plane that the mid portion is located is used for installing socket signal group to form the structure of trilateral shielding, shielding isolation adjacent signal group interference. The shielding groups are arranged between the adjacent signal groups and are used for carrying out electromagnetic shielding isolation on the signal groups respectively so as to reduce the mutual crosstalk of differential signals between the adjacent signal groups, thereby being beneficial to improving the stability, the reliability and the anti-interference capability of the electric connector during data transmission. On the other hand, as the plug and the socket are connected in a plugging manner, areas with discontinuous impedance exist, parts of different middle parts, which are not provided with wing parts, are mutually communicated, and return current can be switched on different paths formed on a plane, which is not provided with the wing parts, of the middle parts, in the area close to the areas with discontinuous impedance, so that the influence caused by abrupt impedance change is relieved. From a loop perspective, the interconnection of the shield sets changes loop inductance, reducing the inductive discontinuities suffered by the signal, thereby improving signal transmission, reducing fluctuations in insertion loss and improving resonance.

Optionally, the first end of the shielding set is vertically downward and extends to form the second end, and the shielding set is generally L-shaped.

Optionally, in order to increase the path of the return current, the return signal does not pass through the shielding substrate in a direction perpendicular to the predetermined direction.

Alternatively, as an embodiment of "no-through", the wing portions of the intermediate portions of adjacent shield groups are offset in a direction perpendicular to the predetermined direction.

Alternatively, as an embodiment of "no-through", the lengths of the wing portions of the intermediate portions of adjacent shield groups are not uniform in the direction of the predetermined direction.

Alternatively, the wings on the same shield set are different in length.

Further, the maximum length of the wing is less than 4 millimeters.

In a second aspect, an electrical connection portion is provided, including the shielding sheet of the first aspect and possible implementation manners of the first aspect, and further includes a signal group spatially matched with the recess, and an insulating member matched with the signal group, where the signal group includes a first end and a second end formed by extending the first end along the predetermined direction, and the signal group is insulated relative to the shielding substrate.

Further, to adapt to the transmission of high frequency signals, the signal group includes two differential signal pins, and the polarities of the transmitted signals are opposite.

Further, the insulating piece comprises a plurality of grooves matched with the wing parts of the shielding sheet, and the wing parts of the shielding sheet are fixedly inserted in the grooves of the insulating piece.

In a third aspect, a socket is provided, comprising the electrical connection portion of the second aspect and possible embodiments of the second aspect, and a base housing, the electrical connection portion being arranged in a cavity of the base housing.

Drawings

FIG. 1 is a schematic view of a prior art bump;

FIG. 2 is a schematic diagram of a socket and plug according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a socket and plug according to an embodiment of the present invention after being plugged to form a connector;

FIG. 4 is a cross-sectional view of a receptacle and plug mating portion according to an embodiment of the present invention;

fig. 5 is an enlarged partial view at section D of fig. 4;

FIG. 6 is a schematic diagram of a socket according to an embodiment of the invention;

FIG. 7 is an enlarged partial view at C of the jack block diagram of FIG. 6;

FIG. 8 is a schematic view of a surface of a shield according to the present invention mated with signal sets;

FIG. 9 is a schematic view of another surface of the shield of the embodiment of FIG. 8;

FIG. 10 is another schematic view of another surface of the shield of the embodiment of FIG. 8;

FIG. 11 is a side view of the shield blades of the embodiment of FIG. 8;

FIG. 12 is a schematic view of a surface of another shield according to the present invention mated with a signal set;

FIG. 13 is a schematic view of another surface of the shield of the embodiment of FIG. 12;

fig. 14 is a side view of the shield blades of the embodiment of fig. 12;

FIG. 15 is a schematic view of an electrical connection A comprising the shield blades of the embodiment of FIG. 8;

FIG. 16 is an assembly schematic view of an electrical connection assembly A including the shield blades of the embodiment of FIG. 8;

FIG. 17 is a schematic view of an electrical connection B containing the shield blades of the embodiment of FIG. 12;

FIG. 18 is an assembled schematic view of an electrical connection B containing the shield blades of the embodiment of FIG. 12;

FIG. 19 is a side view of an electrical connection including the shield blades of the embodiment of FIG. 12;

FIG. 20 is a schematic diagram of a signal set matching the shield blades of the embodiment of FIG. 8;

FIG. 21 is a schematic diagram of another signal set matching the shield blades of the embodiment of FIG. 12;

FIG. 22 is a schematic diagram of a socket including an electrical connection A and an electrical connection B;

FIG. 23 is an enlarged schematic view of a portion of FIG. 22 at B;

fig. 24 is a graph of a comparison of near-end crosstalk for an embodiment of the present invention having wings less than 4 mm.

Description of main reference numerals:

Connector with a plurality of connectors	1
		Plug	2
Socket	3
		Electric connection part	4
Shielding sheet	5
		Shielding substrate	50
Shielding group	501
		First end of shielding group	5011
Second end of shielding group	5012
		Intermediate portion	5013
Wing part	5014
		Cutting groove	5015
Insulating member	60
		Signal set	601
First end of signal group	6011
		Second end of signal group	6012
Single-ended signal group	602
		Base shell	70
Plug shielding device	80

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, wherein the purpose, principle, technical solution and advantages of the present invention are more clearly understood. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It should be noted that, in particular, connection or positional relation that can be specified according to the text or technical content of the specification, partial omission or not drawing of all the positional change patterns is made for simplicity of drawing, the omitted or not drawn positional change patterns are not explicitly described in the specification, and they are not considered to be described in detail for simplicity of explanation, and are not described in detail herein, and are collectively described.

The back-plane connector of the present application is briefly described below, and includes a plug and a socket (alternatively referred to as "male end" and "female end", respectively), one side of the socket being connected to a circuit substrate, and the other side being mated with the plug. Specifically, the signal pins inside the socket are matched with/contacted with the corresponding signal pins inside the plug, and due to the improvement of the transmission rate, the signal pins form a pair of differential signal pins, and signal interference between adjacent differential signal pins needs to be shielded. Namely, the socket shielding sheet provided by the application is used for shielding the interference between the signal groups at the socket end, and is especially suitable for connectors for transmitting signals by adopting the differential signal pins.

In addition, as a shielding principle of the shielding sheet, the shielding groups and the differential signal pins are required to be staggered, and each signal is provided with a return current, so that signal interference between the differential signal pins is avoided.

Thus, referring to fig. 8 to 11, a socket shielding sheet 5 according to an embodiment of the present application includes shielding groups 501 disposed at intervals, each shielding group 501 includes a first end electrically contacting a plug, a second end formed by extending the first end along a predetermined direction, and an intermediate portion 5013 connecting the first end and the second end, each intermediate portion 5013 includes a plurality of wing portions 5014 disposed at intervals along the predetermined direction, the wing portions 5014 are formed on the intermediate portion 5013, one end of each wing portion is fixed on the intermediate portion 5013, and the other end of each wing portion is separated from a surface of the intermediate portion 5013 and is bendable to a predetermined height relative to the surface of the intermediate portion 5013, a recess space defined by the opposite wing portions 5014 and the intermediate portion 5013 on two adjacent shielding groups 501 is used for mounting the socket signal group 601, and the recess space can be referred to fig. 19.

It will be appreciated that the predetermined direction of extension of the shield set first end 5011 is dependent upon the angle at which the receptacle is connected to the circuit substrate. Alternatively, in one connector embodiment as shown in fig. 2 to 4, the connector 1 includes a plug 2 and a receptacle 3, and a side of the receptacle 3 that mates with the plug 2 and a side that connects to the circuit board are perpendicular to a plane, i.e., orthogonal to both sides. Thus, in this embodiment, the predetermined direction is that the shield first end 5011 extends vertically downward and to the left or right to form the shield second end 5012. On a socket comprising a plurality of shielding plates 5, the arrangement direction of the second ends 5012 of the shielding groups is perpendicular to the arrangement direction of the first ends 5011 of the shielding groups, so as to form a shielding group 501 with a substantially L shape. Further, since the recess space is used for fitting the signal group 601, that is, the extending direction of the recess space needs to be approximately consistent with the trend of the signal group 601 to be fitted, the trend of the signal group 601 needs to avoid straight corners, vias, and the like, because the abrupt points of such impedance are just abrupt points of the signal group 601. Thus, optionally, as shown in fig. 8, the three-stage recess space (L1, L2, L3) has an obtuse angle between two adjacent stages, or in other embodiments, the first end 5011 of the shielding set extends to form an arc in a predetermined direction of the second end. That is, the predetermined direction in which the first end 5011 of the shielding member of the present application extends is required to be a position where the abrupt impedance change of the signal group 601 mated therewith is avoided, and all the "predetermined direction" of the present application will be applicable to the description herein.

In particular, the plug and shield system in the receptacle need to be interconnected to form a complete ground loop. Referring to fig. 2 to 7, in this embodiment, each shielding group first end 5011 of the socket is in electrical contact with the plug, and it can be understood that the plug is also provided with a corresponding plug shielding device 80 inside, so more specifically, as shown in the partial enlarged view of fig. 5, the shielding group first end 5011 of the socket is electrically connected with the shielding device in the plug, optionally, the shape of the shielding device of the plug is approximately the same as that of the shielding group first end 5011, and the shielding contacts and the signal contacts are formed after the plug and the socket are plugged.

In this embodiment, referring to fig. 11, since the wing portions 5014 of the adjacent shield groups 501 are higher than the surface where the middle portions 5013 are located, the recess spaces defined in common with the plane where the middle portions 5013 are located are used for mounting the jack signal groups 601, thereby forming a three-sided shield structure, shielding the crosstalk of the adjacent signal groups 601 when transmitting signals at high speed.

It should be noted that the concave space referred to in the present application is a three-sided shielding structure constituted by two adjacent wings 5014 as side surfaces and an intermediate part 5013 as a solid bottom surface, and then the solid bottom surface of the intermediate part 5013 serves as a part of a return path of the return current.

Here, the "middle portion 5013" of the different shield groups 501 is located on the same shield substrate 50 for one shield sheet 5, and the shield substrate 50 is made of the same material as the first end 5011 and the second end 5012 of the shield group. As an example of the structure of the shielding sheet 5, a plurality of shielding group first ends 5011 are electrically connected side by side with one side elevation of the shielding substrate 50, and all corresponding shielding group second ends 5012 are electrically connected with the other side elevation of the shielding substrate 50, and in the embodiment of the present application, the shielding group first ends 5011, the shielding substrate 50, and the shielding group second ends 5012 are integrated. For the shielding substrate 50 where the wing 5014 is not present, the return current of the shielding group second end 5012 can flow on any path on the planar shielding substrate 50 and return to the shielding group first end 5011, i.e., the solid bottom surface of the aforementioned middle portion 5013 is part of the shielding substrate 50.

Therefore, the middle portion 5013 of the present application is merely a form of describing the shielding groups 501 for convenience of division, and should not be understood that the middle portion 5013 of each shielding group 501 is separated and independent from each other, and should be understood as a region on the shielding substrate 50 divided corresponding to the first end 5011 and the second end of the shielding group, and of course, for the following embodiment of introducing the wing portions 5014, the middle portion 5013 should be understood as a region on the shielding substrate 50 divided corresponding to the first end 5011 and the second end of the shielding group, and the wing portions 5014.

In this case, the concave space according to the present application is understood to be a three-sided shielding structure in which the wing 5014 facing the adjacent shield groups 501 is a side surface and the shield substrate 50 is a solid bottom surface, and the solid bottom surface of the shield substrate 50 is a part of a return path for the return current.

Thus, the spacing of the shield groups 501 may be understood as the spacing between the shield group first ends 5011, or between the shield group second ends 5012, or between the wings 5014 of the middle portions 5013 of adjacent shield groups 501, as the spacing accommodates the jack signal groups 601 that match the shield groups 501, and generally the spacing of the shield groups 501 that make up the same shield plate 5 is the same, the application is not limited to the specific size of the spacing, as long as the spacing is sufficient to accommodate the signal groups 601.

The wing 5014 faces the side of the shielding group 501, where the signal group 601 is abutted, and a plurality of wings 5014 bent to a predetermined height along the predetermined direction isolate the adjacent signal group 601, so as to shield crosstalk of the adjacent signal group 601 in the direction along the plane a of the shielding substrate 50.

It should be appreciated that the shielding groups 501 are disposed between the adjacent signal groups 601 and are used for shielding and isolating the signal groups 601 respectively, so as to reduce mutual crosstalk of signals between the adjacent signal groups 601, thereby helping to improve stability, reliability and anti-interference capability of the electrical connector during data transmission.

For the design of the path of the return current, in the intermediate portion 5013 of the different shield groups 501, the portions where the wing portions 5014 are not formed communicate with each other, and it is understood that the "portions where the wing portions 5014 are not formed", that is, the solid shield substrate 50. The signal current direction is opposite to the return current direction, the socket signal group 601 is electrically connected with the plug signal group 601 to transmit signals, the signal current direction is directed from the transmitting end to the receiving end, and in the impedance discontinuous region near the current path, the return current can be switched on different paths formed on the part of the middle part 5013 where the wing parts 5014 are not formed, so that the influence caused by the abrupt impedance change can be relieved. The interconnection between the shield groups 501 changes the return current loop inductance, reducing the inductive sudden changes suffered by the signal, thereby improving signal transmission, reducing fluctuations in insertion loss and improving resonance.

As for the formation of the wing portions 5014, it is understood that a cutting groove 5015 is generally formed in the middle portion 5013, and the wing portions 5014 are formed by lifting or bending the cutting groove 5015, one end of which is fixed to the middle portion 5013 or the shielding base plate 50), and the other end of which is movable with respect to the middle portion 5013. The shape of the wing 5014 is not particularly limited in the present application, and the shape of the cutting groove 5015 is determined by the shape of the predetermined wing 5014, for example, if the wing 5014 adopts an inverted trapezoid with a fixed upper bottom and a movable lower bottom, the corresponding cutting groove 5015 is a trapezoid with a side where the upper bottom is located, or if the wing 5014 adopts a rectangle with one side fixed to the shielding substrate 50 and the opposite side movable with respect to the shielding substrate 50, the corresponding cutting groove 5015 is a rectangle with the side where the fixed end is located. Optionally, the heights H1 of the wing parts 5014 of the different shielding groups 501 are the same with respect to the shielding substrate 50, so that batch processing and uniformity of shielding effects are facilitated, and meanwhile, generally, the connection line between the fixed end and the movable end is perpendicular to the shielding surface a where the shielding substrate 50 is located.

From the viewpoint of the processing technology, blanking, wire cutting or due to the consistent extending direction between the shielding groups 501, a mask is made to etch the cutting grooves 5015 with corresponding shapes, and then the wing parts 5014 with one fixed end and one movable end with respect to the shielding substrate 50 are bent, which together with the middle parts 5013 define the concave installation spaces of the signal groups 601, so as to avoid crosstalk between adjacent signal groups 601. Further, due to the design and the processing technology of the wing parts 5014, compared with the existing stamping technology, the processing technology has higher precision, the planar processing can well avoid discontinuous impedance caused by the fact that the surface of the shielding substrate 50 is locally stretched, the yield is high, the consistency of the wing parts 5014 among the shielding groups 501 is good, particularly the consistency of the height of the wing parts 5014 among the shielding groups 501 is good, and the processing precision of the length of the wing parts 5014 is more accurate. While the middle portions 5013 of the different shielding groups 501 of the adjacent signal groups 601 and the spacing portions of the same shielding group 501 are located on the same plane, it is understood that the spacing portions of the wing portions 5014 are all solid portions, and the adjacent shielding groups 501 are communicated through the shielding substrates 50 at the spacing portions of the wing portions 5014. Therefore, the return paths of the return currents are located on the same plane, so that the return currents can be switched on different shielding conductor paths, loop self-inductance is reduced, the inductive mutation suffered by signals is reduced, the return currents of the second ends 5012 of different shielding groups can return to the first ends 5011 of the shielding groups along the nearest paths, the impedance of each area on the shielding substrate 50 is controlled more, and the reduction of insertion loss fluctuation and resonance is facilitated, so that the transmission of signals is improved.

To further manage resonance, the shielding substrate 50 forms more current return paths. Fig. 12 to 14 show another embodiment of the shielding sheet 5 according to the present application, in which, alternatively, the return signal does not pass through along a path perpendicular to the extending direction of the shielding group 501 on the plane of the shielding substrate 50. Specifically, the portions of the solid shield substrate 50 between the spaced apart wing portions 5014 are not collinear at the intermediate portions 5013 of adjacent shield groups 501. Thus, referring to fig. 13, in one embodiment, the wing portions 5014 of the adjacent shielding groups 501 may be offset, for example, the front shielding group 501 may be bent to form a portion of the non-shielding substrate 50, the rear shielding group 501 may be correspondingly formed to include a portion of the shielding substrate 50 at the same position, and so on, on the whole shielding sheet 5, a structure in which the wing portions 5014 are offset is formed between the adjacent shielding groups 501, so as to form a meandering communication shielding substrate 50. In another embodiment shown in fig. 5, the size of the wings 5014 is not uniform between adjacent shielding groups 501, and it is understood that the size herein refers specifically to the length of the wings 5014, as indicated by the symbol L in fig. 13, or more specifically, the length of the fixed ends of the wings 5014 on the shielding base 50. For example, the wings 5014 of the previous shielding set 501 are twice the length of the wings 5014 of the next shielding set 501, so that the part of the non-shielding substrate 50 of the previous shielding set 501 along a path perpendicular to the extending direction of said shielding set 501 corresponds to the part of the shielding substrate 50 of the next adjacent wings 5014 of the next shielding set 501. In this embodiment, alternatively, the former shield group 501 formed between the shield groups 501 constituting the shield sheet 5 contains the larger wings 5014 and the latter shield group 501 contains the form of an alternate arrangement of the relatively smaller wings 5014. Of course, in another embodiment, the lengths of the wings 5014 on the same shielding set 501 are not uniform, alternatively, the sizes of the wings 5014 on the same shielding set 501 may be set in alternate lengths.

In this embodiment, the shield-group first end 5011, the middle portion 5013/the shield substrate 50, and the shield-group second end 5012 are in the same return network through which the return current of the signals needs to pass, the return signals do not pass in a direction perpendicular to the predetermined direction, which is equivalent to adding nodes of the return network, i.e. adding return paths for the return current, so that all signal pairs have complete, nearest return paths, the radiation effect of the electric field can be reduced, thereby reducing crosstalk between signals and suppressing resonance caused by impedance mismatch.

It will be appreciated that the shielding substrate 50 forms more current return paths in the same plane, whether the shielding sheet 5 embodiment of fig. 8 or the "no-go" form of shielding sheet 5 shown in the embodiment of fig. 12, advantageously reduces loop self inductance, resulting in less instantaneous impedance variation in the face of the return signal.

It should be noted that, the shielding sheet 5 according to the present application is provided with the electromagnetic isolation between the adjacent signal groups 601 along the planar direction of the shielding substrate 50 by bending the wing portions 5014 to a predetermined height, and since the wing portions 5014 are formed on the shielding substrate 50 and the portions where the wing portions 5014 are not formed, a plurality of paths of the return current located on the same plane are formed, and thus the area of the shielding substrate 50 where the impedance is discontinuous can be improved. And since the wing 5014 is formed on the shielding substrate 50 through which the return current passes, the position and size of the wing 5014 can be set more freely, so that more paths of the return current are formed on the shielding substrate 50. It will be appreciated that the present application avoids crosstalk between adjacent signal groups 601 and manages resonance by the same shielding substrate 50.

In addition, it will be appreciated that the adjacent shield groups 501 are not fully connected or fully isolated at the portions on the shield substrate 50. For example, since the wings 5014 of the shield groups 501 on the shield substrate 50 are spaced in a predetermined direction, the shield substrate 50 at the spacing is limited to communicate with the adjacent shield groups 501 and is an integral part of the path of the return current, and alternatively, the wings 5014 of the same shield group 501 are equally spaced, which is advantageous in suppressing the discontinuity of the impedance.

Further, it will be appreciated that since the wings 5014 need to be spaced to form the return current path, and for the shielding effect, generally, the effect of preventing crosstalk between adjacent signal groups 601 is reduced due to the relative closeness of adjacent signal groups 601, in embodiments in which the wings 5014 are not uniform in size as shown in fig. 12 and 13, the length of the wings 5014 in the predetermined direction is not more than 4mm at maximum, which can satisfy both good crosstalk prevention and better resonance control.

To further explain the design of the shielding sheet 5 of the present application, the following describes the fitting of the shielding sheet 5 with the signal group 601. Referring to fig. 16 or 18, a schematic diagram illustrating the assembly of the shield-blade 5 of fig. 8 and the signal group 601 of the shield-blade 5 receptacle of fig. 12 according to the present application is shown. As shown in the figure, the signal group 601 is first combined with the insulating member 60, and is generally integrally formed in an injection molding manner to form an integral whole row of signal groups 601, however, a plastic member having a jack matched with the signal group 601 may be formed first, and the signal group 601 may be attached to the jack to form the whole row of signal groups 601. The entire row of signal sets 601 is then detachably mounted with the shielding sheet 5. Optionally, the removable mounting means herein include, but are not limited to, snap-fit, socket-fit, welding and staking. Preferably, the insulating member 60 includes a plurality of grooves matching with the wings 5014 of the shielding plate 5, and the wings 5014 of the shielding plate 5 are inserted and fixed on the grooves of the insulating member 60. In particular, in the prior art, a four-sided shielding structure is formed by two opposite shielding sheets 5, and in order to assemble and fix the shielding sheets 5 and the signal group 601, a form of forming a folded sheet on one sheet is generally adopted for assembling and fixing the signal group 601, and such a folded sheet scheme considers the problem of assembling and fixing, but does not involve or describe the realization of crosstalk prevention.

Specifically, taking the signal group 601 including two differential signal pins as an example, the differential signal pins of two-by-two differential signal pins are matched with the recess space of three-sided shielding defined by the middle portion 5013 corresponding to the wing portions 5014 of the adjacent shielding group 501, and the recess space can be seen in fig. 19, and the differential signal pins include a first end and a second end formed by extending the first end in a predetermined direction. It will be appreciated that the direction of extension of the differential signal pin first end is substantially the same as the direction of extension of the shield set first end 5011. It should be noted that, from the viewpoint of the production process, it is generally understood that the shape of the shielding sheet 5 is designed according to the shape of the signal group 601, that is, the predetermined direction of the present application, and it is also understood that the first end 6011 of the signal group to which the shielding sheet 5 is designed is to be disposed extends to form the predetermined direction of the second end.

As for the material of the signal group 601 and the shielding group 501, since the contact portions of the shielding group 501 and the signal group 601 respectively exist at the first end and the second end, it is generally optional to use a conductive material such as copper alloy, and in order to improve the conductivity, tin or lead-tin plating may be used in one embodiment.

The first ends of the differential signal pins are aligned with the first ends 5011 of the shielding sets in the horizontal direction as shown in fig. 15, and the height H2 of the second ends 5012 of the shielding sets relative to the shielding base plate 50 corresponds to the height H1 of the wing parts 5014 relative to the shielding base plate 50, which are correspondingly optional, and the second ends of the differential signal pins are aligned with the second ends 5012 of the shielding sets in the same line, or more specifically, in the vertical direction in the side view of fig. 19. So that signal interference between adjacent signal groups 601 is isolated by the shield groups 501 located therebetween in the horizontal direction as well as in the vertical direction.

Illustratively, the number of shield set second ends 5012 is matched to the number of signal set second ends 6012. It is understood that the term "matched" as used herein refers to the presence of one signal set second end 6012 between two shield set second ends 5012 of a space, and if the signal set 601 is comprised of two differential signal pins as shown, then the presence of two differential signal pins second ends between two shield set second ends 5012 of a space. That is, for the present application, regardless of the type or number of signal pins making up signal group 601, each signal group second end 6012 must be located between two spaced mask group second ends 5012, i.e., each signal group second end 6012 corresponds to two mask group second ends 5012, and similarly, the number of mask group first ends 5011 and signal group first ends 6011 is matched.

It will be appreciated that the differential signal pins of the differential signal group 601 may transmit two signals, the two signals being in close proximity and having equal signal amplitudes, the coupled electromagnetic fields between the two differential signal pins and the ground line also having equal amplitudes, while their signal polarities are opposite, and their electromagnetic fields will cancel each other, thus being more suitable for signal transmission in high speed circuits.

Optionally, the width of each shield set first end 5011 is substantially greater than the width of each differential signal pin first end. The shapes of the first ends and/or the second ends of the differential signal pins of the shielding set 501 and the signal set second end 6012 are not particularly limited, and optionally, the shielding set second end 5012 and the signal set second end 6012 are needle-shaped fish-eye structures with oval inner walls for plugging in circuit substrates to be connected. The first end 5011 of the shielding set and the first end 6011 of the signal set are elastic contact pieces with S-shaped bent portions, optionally, referring to fig. 14, which is a schematic diagram of the elastic contact piece, and the elastic contact piece includes a guiding section, a straight line section and a dislocation section, the dislocation section is formed by bending a plane opposite to the shielding substrate 50 towards one side, the guiding section is used for guiding when a plug is plugged, the straight line section is electrically contacted with a corresponding signal set 601 in the plug and a pin of the shielding set 501, and the dislocation section is used for providing a certain elastic support when the plug is plugged.

As mentioned above, the elastic contact piece contacts with the corresponding shielding device in the plug to form a loop, it can be understood that the shapes of the first end 5011 of the shielding set and the first end 6011 of the signal set depend on the number of contacts of the plug and the socket, and if the elastic contact piece contacts with the single contact, then optionally, the shapes of the first end 5011 of the shielding set and the first end 6011 of the signal set are straight.

It should be noted that the signal group 601 mated with the recess space is insulated from the shielding substrate 50 and the wings 5014 in the recess space, i.e., the signal group 601 is not in electrical contact with the shielding substrate 50 or the wings 5014 in the recess space. For example, the width of the signal group 601 is smaller than the space between the wings 5014 of the adjacent shielding groups 501, and in addition, an insulating spacer block is disposed at the mating position of the first end 6011 of the signal group and the first end 5011 of the shielding group, see fig. 5, so that the signal group 601 has a space with the shielding substrate 50, and of course, the insulating spacer block is a part of the insulating member 60, that is, the insulating member 60 is preset with the space when manufactured, so that the signal group 601 is not in electrical contact with the shielding substrate 50 when the signal group 601 is mounted with the shielding sheet 5. Optionally, in the case that the signal group 601 and the insulating member 60 are integrally formed by injection molding, the signal group 601 is integrally wrapped in the insulating member 60 except for the portions of the first end and the second end protruding out of the shielding substrate 50 for respectively matching with the plug and the circuit substrate, that is, insulating spacers always exist between the signal group 601 and the shielding substrate 50, and the insulating spacers can be suspended from the shielding substrate 50 or the opposite shielding substrate 50. It will be appreciated that due to the presence of the insulating spacer, the signal group 601 is disposed proximate to the shielding substrate 50, but is always suspended relative to the shielding substrate 50, i.e., where there is no electrical contact with the shielding substrate 50. In addition, the signal groups 601 are electrically independent, i.e. the signal groups 601 are not communicated.

In a second aspect, an electrical connection 4 is provided, including a shielding sheet 5, a signal group 601, and an insulating member 60, where the shielding sheet 5 may be as shown in the example of fig. 8, or as shown in fig. 12, or be a shielding sheet 5 of other possible embodiments according to the present application. For convenience of explanation, reference is made to the schematic illustration of the electrical connection portion a shown in fig. 15 formed by the installation of fig. 8 and 20, or the schematic illustration of the electrical connection portion B shown in fig. 17 formed by the installation of fig. 12 and 21.

In the embodiment of differential signal transmission, each differential signal group 601 of the electrical connection portion a and each differential signal group 601 of the electrical connection portion B opposite thereto are differential signal pairs, and the signal groups 601 are arranged in two forms corresponding to fig. 20 and 21, respectively, and are assembled with the shielding sheet 5 of fig. 8 and 12. It will be understood that in the embodiments of the signal groups 601 of fig. 20 and 21, a single-ended signal group 602 is provided, specifically, the innermost signal group 602 of fig. 20, the outermost signal group 602 of fig. 21, and the array of electrical connections 4 consisting of the electrical connection a shown in fig. 15 and the electrical connection B shown in fig. 17 are complemented by single-ended signals on both sides. Of course, it is preferred that in some embodiments, the shielding sheets 5 of all of the electrical connection portions a and B of the electrical connection array take the form of the aforementioned "blind" arrangement.

Therefore, it should be noted that, in the present application, the recess space between the adjacent shielding groups 501 is used for installing the signal groups 601, and the recess space is mainly used as the description, and in connection with the description of the single-ended signal, not all the signal groups 601 are disposed in the recess space, that is, not each signal group 601 matches each recess space, but each recess space matches each signal group 601.

It will be appreciated that on the electrical connection 4, the shielding groups 501 are staggered with respect to the signal groups 601, for example in the form of shielding groups 501, signal groups 601, shielding groups 501, signal groups 601.

Referring further to fig. 6, 7, 15 and 22, or fig. 6, 7 and 17 and 22, respectively, the socket 3 includes at least one electrical connection portion 4 aligned in the same direction and a base housing 70 accommodating the electrical connection portion 4, and the signal group second end 6012 and the shielding group second end 5012 protrude from bottom edges of the base housing 70 to be plugged onto a circuit substrate.

Each electrical connection portion 4 can be plugged with the plug 2 and complete signal transmission, specifically, the signal group 601 in each electrical connection portion 4 is electrically connected with the signal group 601 of the plug to transmit signals, and the shielding group 501 in each electrical connection portion 4 is electrically connected with the shielding device of the plug to form a ground shielding. It will be appreciated that the number of signal groups 601 and shield groups 501 of the electrical connection 4 of the receptacle 3 corresponds to the number of signal groups 601 and shield arrangements in the plug, respectively.

In some embodiments for transmitting differential signals, the electrical connection portions 4 are supported and limited by the socket base housing 70, and the electrical connection portions a and B are shown in fig. 22 and 23, respectively, and each electrical connection a and the opposite electrical connection B form the differential electrical connection portion 4. It should be understood that the differential signal pairs may be aligned or staggered, that is, the positions of the electrical connection portions a and the differential signal pins of the electrical connection portions B in the differential electrical connection portion 4 are in one-to-one correspondence in the illustrated arrangement direction, and that is, the differential signal pins of the electrical connection portions a and the differential signal pins of the electrical connection portions B in the differential electrical connection portion 4 have a certain staggered distance in the illustrated arrangement direction, for example, the same position in the arrangement direction, and the differential signals of the electrical connection portions a correspond to the partial differential signal pins of the electrical connection portions B and the partial shielding groups 501. In general, the differential signal pairs arranged in a staggered manner are less affected by near-end crosstalk and far-end crosstalk, but in consideration of space constraints and the influence of a certain differential signal pair on surrounding differential signal pairs, the greater the staggered distance is, the better the setting is, which needs to be according to specific cases. As an embodiment of the staggered arrangement, only one of the differential signal pins in each of the opposite electrical connection portions a and B is opposite to each other along the arrangement direction, and the other differential signal pin of one electrical connection portion 4 is opposite to the first end 5011 of the shielding group of the other electrical connection portion 4, and of course, for one of ordinary skill in the art, the specific staggered distance of the differential signal pins in the different electrical connection portions 4 constituting the differential electrical connection portion 4 may be set according to practical situations.

The base housing 70 may be formed by injection molding, the materials of the base housing 70 and the insulating member 60 of the electrical connection portion 4 depend on the connection mode of the socket and the circuit substrate (back board or single board), for example, the surface mount technology (Surface Mount Technology, SMT) is used to paste and weld the socket, that is, the second ends 5012 of all the shielding groups and the second ends 6012 of the signal groups are pasted and welded to the circuit substrate, the heat resistance requirements on the base housing 70 and the insulating member 60 are high, and crystalline materials such as liquid crystal polymers (liquidcrystal polymer, LCP) may be used. Or because of the difficulty in forming the large heat-resistant bonding area, a pressing manner may be adopted, and optionally, in consideration of cost, the socket base housing 70 and the insulating member 60 of the electrical connection portion 4 may be adopted as crystalline advanced engineering plastics such as SPS (para-polystyrene).

The socket 3 includes a plurality of electrical connectors 4, and different electrical connectors 4 may have different signal connection manners, that is, the electrical connectors 4 are not required to be identical to each other and arranged on the socket base housing 70, so different electrical connectors 4 may have different numbers of signal group second ends 6012, and thus may have different numbers of shielding group second ends 5012, that is, the numbers of signal groups 601 and/or shielding groups 501 included between the electrical connectors 4 may be different. Accordingly, the number of recess spaces formed between the shielding groups 501 for accommodating the signal groups 601 may be different, so that although the electrical connection parts 4 are arranged on the base housing 70 of the socket in one direction, the arrangement of the recess spaces of adjacent electrical connection parts 4 may be staggered, or the recess spaces of adjacent electrical connection parts 4 in the arrangement direction are staggered when the recess spaces of adjacent electrical connection parts 4 are identical for accommodating the signal groups 601 on different electrical connection parts 4, for example, the differential electrical connection parts 4 composed of the electrical connection parts a and the electrical connection parts B are staggered, and thus, an embodiment of staggered differential signal pairs is adopted. Illustratively, the former electrical connection 4 includes 2 signal groups 601 and 3 shield groups 501, while the latter electrical connection 4 includes 5 signal groups 601 and 6 shield groups 501, or different electrical connections 4 having the same number of shield groups 501 and signal groups 601 are distributed differently at locations of the electrical connection 4, irrespective of single-ended signal pins of the differential signal pair.

Optionally, the electrical connection portions 4 included in the socket 3 are the same, and the number of the shielding groups 501 and the distribution positions of the shielding groups 601 on the electrical connection portions 4 are the same, so that the corresponding shielding groups 501, the first ends 6011 of the signal groups, the shielding groups 501, and the second ends 6012 of the signal groups are the same, and the same distribution positions form the shielding groups 501 and the signal groups 601 arranged in the same line.

It should be understood that, if a single signal terminal or a plurality of signal terminals are used in practical applications, the shielding structure and the electrical connector structure provided by the embodiments of the present application may also be applied.

As shown in fig. 24, the dark curve is the near-end crosstalk of two pairs of differential signals mated with the shield strips 5 having a length of less than 4mm for the wings 5014, and the light curve is the near-end crosstalk of two pairs of differential signals mated with the shield strips 5 having a length of 5mm for the wings 5014. In the frequency range of 0-20 GHz, the crosstalk of the dark curve is smaller than that of the light curve, the shielding performance is better, the bandwidth and quality of signal transmission are effectively ensured, and the method is more suitable for 56Gbps and above.

It should be noted that, in the above embodiment, the included modules are only divided according to the functional logic, but not limited to the above division, so long as the corresponding functions can be implemented, and the specific names of the functional units are only used for distinguishing from each other, and are not used to limit the protection scope of the present invention.

Also, the directional terms "horizontal", "vertical" and the like are merely for convenience in describing the relative positions of the respective components of the present application, and do not constitute a limitation of the present application.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. A socket shield, characterized in that it comprises: shielding groups arranged at intervals, each shielding group comprising a first end that is in electrical contact with a plug, a second end that extends from the first end in a predetermined direction and is connected to a circuit board, and an intermediate portion connecting the first end and the second end;

The middle portions of the different shielding groups are located on the same shielding substrate;

Each intermediate section includes a plurality of wings spaced apart along the predetermined direction;

The wing is formed in the middle part, with one end fixed to the middle part and the other end detached from the surface of the middle part and bent relative to the surface of the middle part to a predetermined height.

The recessed space defined by the surfaces of the opposing wings and the middle part on two adjacent shielding groups is used to house the socket signal group.

On the shielding substrate, the return signal does not pass through in a direction perpendicular to the predetermined direction;

In a direction perpendicular to the predetermined direction, the wings of the middle part of adjacent shielding groups are misaligned.

2. The socket shielding sheet as claimed in claim 1, wherein the first end of the shielding group is vertically downward and extends to form the second end, and the shielding group is approximately L-shaped.

3. The socket shielding sheet as claimed in claim 1, characterized in that, in a direction perpendicular to the predetermined direction, the lengths of the wings in the middle of adjacent shielding groups are inconsistent.

4. The socket shielding sheet as described in claim 1, characterized in that the lengths of the wings on the same shielding group are different.

5. The socket shielding sheet as described in claim 1, 3, or 4, wherein the maximum length of the wing is less than 4 millimeters.

6. An electrical connection portion, characterized in that it includes a socket shield as described in claim 5, further including a signal group that mates with the recessed space, and an insulating member that mates with the signal group, the signal group including a first end and a second end extending from the first end along the predetermined direction; the signal group is insulated relative to the shielding substrate.

7. The electrical connection portion as claimed in claim 6, wherein the signal group comprises two differential signal pins, and the transmitted signals have opposite polarities.

8. A backplane connector socket, characterized in that it comprises at least one electrical connection portion as described in claim 6, and a base housing for receiving said electrical connection portion.