CN215184850U - Socket shielding sheet, electric connection part and back plate connector socket - Google Patents

Socket shielding sheet, electric connection part and back plate connector socket Download PDF

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Publication number
CN215184850U
CN215184850U CN202121189101.XU CN202121189101U CN215184850U CN 215184850 U CN215184850 U CN 215184850U CN 202121189101 U CN202121189101 U CN 202121189101U CN 215184850 U CN215184850 U CN 215184850U
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shielding
shield
signal
groups
wing
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CN202121189101.XU
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Chinese (zh)
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牛林
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Shenzhen West Point Precision Technology Co ltd
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Shenzhen West Point Precision Technology Co ltd
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Abstract

The application provides a socket shielding piece includes: the shielding sets are arranged at intervals, each shielding set comprises a first end electrically contacted with the plug, a second end which is formed by extending the first end along a preset direction and is connected with the circuit substrate, and a middle part which is connected with 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 which are arranged at intervals along the preset direction; the wing part is formed in the middle part, one end of the wing part is fixed at the middle part, and the other end of the wing part is movable relative to the middle part and can be bent to a preset height relative to the surface of the middle part; the recess space defined by the opposite wing parts and the middle parts of every two adjacent shielding groups is the base shell of the socket signal group. The shielding plate has the functions of preventing signal group crosstalk and controlling resonance on a backflow path, is convenient to process and good in consistency among shielding groups based on the designed shielding plate, and further provides an electric connection part containing the shielding plate and a backplane connector socket.

Description

Socket shielding sheet, electric connection part and back plate connector socket
Technical Field
The application relates to the technical field of communication equipment, in particular to a socket shielding sheet, an electric connection part and a socket.
Background
The connector is used for erecting a bridge for communication between circuit substrates at a blocked position or among isolated and non-communicated circuits in the circuit, so that current flows and the circuit realizes a preset function. Due to the demand for increased bandwidth of communication terminals such as switches, routers, modems (modems), and user access terminal devices, there is a higher demand for high-rate transmission and signal integrity (signal integrity) of connector signals. In a high-speed Docking Connector (Docking Connector), differential signals are widely used due to good anti-interference performance, a common backplane Connector generally includes signal groups arranged on an insulating base at intervals, a shielding group is arranged between adjacent signal groups, and a plurality of shielding groups form a shielding sheet. Each signal group generally comprises two signal terminals, wherein the signal terminals are differential signal terminals and are used for transmitting differential signals; the shielding groups are used for shielding differential signals transmitted by two adjacent signal groups, and the shielding groups and the signal groups are arranged in a staggered mode, so that the shielding effect among transmission signals can be achieved, and meanwhile, a return path is provided for the transmission signals.
The most critical electrical performance indicators of a connector are crosstalk, loss, and reflection. The problem of crosstalk is particularly pronounced with the current connector speeds evolving towards 56Gbps and even 112 Gbps. Therefore, the specific design of the shielding group and the shielding sheet is very important.
To solve the problem of crosstalk. In the prior art, a plurality of rib-shaped protrusions (bulges) are formed on a shielding substrate by stamping along the extension direction of a shielding group, as shown in fig. 1, a signal group is installed in a concave shielding cavity defined by adjacent protrusions, so that signal interference of adjacent signal groups is isolated, and meanwhile, as each shielding group is located on the same shielding substrate and is communicated with each other, a shielding sheet composed of the shielding groups is enabled to have good signal backflow. However, the lengths of the protrusions corresponding to different shielding groups are different, so that the heights of the protrusions between different shielding groups are easily inconsistent due to the whole stamping process, cracks are easily caused, and the shielding substrate near the protrusions is easily stretched, so that the uncertainty of impedance on a backflow path is generated, the shielding performance fluctuates, and the transmission performance is influenced. In addition, the overall surface of the shielding plate is a non-planar surface with a wavy shape, and the shielding plate is not beneficial to reducing loop self-inductance and managing resonance as a signal return path.
Furthermore, in order to solve the above uncertainty generated by the protrusion processing process, in the prior art, a whole cutting groove extending from the first end to the second end is formed on the shielding substrate along the extending direction of the shielding set by cutting, the cutting groove is lifted to form a baffle plate, and the jack signal set is installed in the recess space defined by the adjacent baffle plates. Namely, the protrusion in the prior art of fig. 1 is replaced in a blocking sheet form, although the electromagnetic shielding isolation between adjacent socket signal groups can be realized by such a scheme, signals between the adjacent shielding groups are not communicated, and the signal return path is single, which is not beneficial to managing and controlling resonance.
Therefore, for the design of the shielding plate, the problems of the prior art, such as inconsistency of processing technology, weak capability of managing resonance due to fluctuation of the shielding plate, incapability of managing resonance due to few signal return paths of the planar shielding plate, or different shielding plates with signal group shielding cavities and return current paths.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a socket shielding piece based on plane shielding can solve the problem mentioned among the prior art at least.
In a first aspect, a receptacle shield blade is provided comprising: the shielding group that the interval set up, each shielding group includes the first end with the plug electrical contact, the second end that the extension of first end along the predetermined direction formed, and connect first end with the intermediate part of second end, each intermediate part contains a plurality of edges along the predetermined direction interval arrangement alar part, the alar part forms one end for cutting the intermediate part and fixes on the intermediate part, and the other end breaks away from the surface that the intermediate part is located and can buckle to predetermined height relatively the surface that the intermediate part is located, and the recess space installation that relative alar part and intermediate part are injectd jointly is used for the socket signal group on two liang of adjacent shielding groups.
In the scheme, on one hand, the wing parts of the adjacent shielding groups are higher than the surface of the middle part, and the recess space which is jointly limited in the plane of the wing parts and the surface of the middle part is used for installing the socket signal group, so that a three-side shielding structure is formed, and the adjacent signal group interference is shielded and isolated. The shielding group sets up between adjacent signal group for carry out electromagnetic shield to each signal group respectively and keep apart, with the mutual crosstalk who reduces difference signal between the adjacent signal group, thereby help promoting stability, reliability and the interference killing feature of electric connector when data transmission. On the other hand, because the plug and the socket are plugged, an impedance discontinuous region exists, different parts without the wing parts in the middle parts are communicated with each other, and the return current can be switched on different paths formed on a plane without the wing parts in the middle parts near the impedance discontinuous region, so that the influence caused by impedance sudden change is relieved. From a loop perspective, the interconnection of the shielding groups changes the loop inductance, reduces the inductive discontinuities experienced by the signal, thereby improving signal transmission, reducing insertion loss ripple, and improving resonance.
Optionally, the first end of the shielding set is vertically downward and extends to form a second end, and the shielding set is substantially L-shaped.
Optionally, in order to increase a path of the return current, the return signal does not penetrate in a direction perpendicular to the predetermined direction on the shielding substrate.
Alternatively, as an embodiment of "not penetrating", the wing portions of the intermediate portions of the adjacent shielding groups are displaced in a direction perpendicular to the predetermined direction.
Alternatively, as an embodiment of "not penetrating", the lengths of the wing portions of the middle portions of the adjacent shielding groups are not uniform in the direction of the predetermined direction.
Optionally, the length of the wings on the same shield set is different.
Further, the maximum length of the wing is less than 4 mm.
In a second aspect, an electrical connection portion is provided, which includes the shielding plate of the first aspect and possible embodiments of the first aspect, and further includes a signal group spatially matched with the concave portion, and an insulating member matched with the signal group, where the signal group includes a first end and a second end where the first end extends along the predetermined direction; the signal group is insulated from the shield substrate.
Further, in order to adapt to the transmission of high-frequency signals, the signal group comprises two differential signal pins, and the polarities of the transmitted signals are opposite.
Furthermore, the insulating part comprises a plurality of grooves matched with the wing parts of the shielding sheets, and the wing parts of the shielding sheets are inserted and fixed on the grooves of the insulating part.
In a third aspect, a socket is provided, which includes the electrical connection portion of the second aspect and the possible embodiments of the second aspect, and a base housing, and the electrical connection portion is arranged in the cavity of the base housing.
Drawings
FIG. 1 is a schematic view of a prior art bump;
FIG. 2 is a schematic view of a receptacle and a plug being plugged together to form a connector according to an embodiment of the present invention;
FIG. 3 is a rear view of a receptacle and plug mated to form a connector according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of an embodiment of the present invention showing a mating portion of a socket and a plug;
FIG. 5 is an enlarged view of a portion of FIG. 4 taken in cross-section D;
FIG. 6 is a schematic view of an insert seat according to an embodiment of the present invention;
FIG. 7 is an enlarged view of a portion of the socket of FIG. 6 at C;
fig. 8 is a schematic view of a surface of a shield plate of the present invention matching a signal group;
FIG. 9 is a schematic view of another surface of the shield plate of the embodiment of FIG. 8;
FIG. 10 is another view of another surface of the shield blades of the embodiment of FIG. 8;
FIG. 11 is a side view of the shield of the embodiment of FIG. 8;
fig. 12 is a schematic view of another surface of the present invention where the shielding plate is matched with a signal set;
FIG. 13 is a schematic view of another surface of the shield plate of the embodiment of FIG. 12;
FIG. 14 is a side view of the shield of the embodiment of FIG. 12;
FIG. 15 is a schematic view of an electrical connection A incorporating the shield of the embodiment of FIG. 8;
FIG. 16 is a schematic view of an assembly A of an electrical connector including the shield plate of the embodiment of FIG. 8;
FIG. 17 is a schematic view of an electrical connection B including a shield sheet according to the embodiment of FIG. 12;
FIG. 18 is an assembled view of an electrical connection B including the shield of the embodiment of FIG. 12;
FIG. 19 is a side view of an electrical connection including a shield blade according to the embodiment of FIG. 12;
FIG. 20 is a schematic diagram of a set of signals matching the shield plates of the embodiment of FIG. 8;
FIG. 21 is a schematic diagram of another set of signals matching the shield plates of the embodiment of FIG. 12;
FIG. 22 is a schematic view of a socket including an electrical connection A and an electrical connection B;
FIG. 23 is an enlarged view of a portion of FIG. 22 at B;
fig. 24 is a graph comparing near end crosstalk for embodiments of the present invention having wings less than 4 mm.
Description of the main element symbols:
connector with a locking member 1
Plug with a locking mechanism 2
Socket with improved structure 3
Electrical connection part 4
Shielding sheet 5
Shielding substrate 50
Shielding group 501
First end of shielding set 5011
Second end of shielding set 5012
Intermediate section 5013
Wing part 5014
Cutting groove 5015
Insulating member 60
Signal group 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
In order to make the objects, principles, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration and are not intended to limit the invention, as described in this summary of the invention.
It should be particularly noted that, according to the connection or position relationship that can be determined according to the text or technical content of the specification, a part of the omitted or not-shown position change diagram is omitted for the simplicity of drawing, the omitted or not-shown position change diagram is not explicitly described in the specification, and cannot be considered to be omitted, and in the interest of brevity of description, the detailed description is not repeated one by one, and the description is unified herein.
In the following, briefly described a backplane connector according to the present application, the backplane connector includes a plug and a socket (or "male end" and "female end", respectively), one side of the socket is connected to a circuit board, and the other side of the socket is mated with the plug. Specifically, because 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, two signal pins usually form a pair of differential signal pins, and signal interference between adjacent differential signal pins needs to be shielded. That is, it is necessary to shield both the signal interference between the differential signal pins at the plug end and the signal interference between the differential signal pins at the receptacle end, and therefore, it can be understood that the receptacle shielding plate provided in the present application is used to shield the interference between the signal groups at the receptacle end, and is particularly suitable for a connector that uses the differential signal pins to transmit signals.
In addition, as a shielding principle of the shielding plate, the shielding groups and the differential signal pins need to be arranged in a staggered manner, and each signal has a return current, so that signal interference between the differential signal pins is avoided.
Accordingly, referring to fig. 8 to 11, a socket shield sheet 5 according to an embodiment of the present application includes: the connector comprises spaced shielding sets 501, each of the shielding sets 501 comprises a first end electrically contacted with the plug, a second end formed by extending the first end along a predetermined direction, and an intermediate part 5013 connecting the first end and the second end, each intermediate part 5013 comprises a plurality of wing parts 5014 arranged at intervals along the predetermined direction, the wing parts 5014 are formed on the intermediate part 5013, one ends of the wing parts are fixed on the intermediate part 5013, the other ends of the wing parts are separated from the surface where the intermediate part 5013 is located and can be bent to a predetermined height relative to the surface where the intermediate part 5013 is located, and the recess spaces defined by the opposite wing parts 5014 and the intermediate part 5013 on every two adjacent shielding sets 501 are used for installing a socket signal set 601, and the recess spaces can be referred to fig. 19.
It will be appreciated that the predetermined direction in which the first ends 5011 of the shielding sets extend is dependent upon the angle at which the receptacle is connected to the circuit substrate. Alternatively, in one embodiment of the connector shown in fig. 2 to 4, the connector 1 comprises a plug 2 and a socket 3, and the plane of the socket 3 on the side where the plug 2 is matched with the socket is perpendicular to the plane of the side where the circuit substrate is connected, that is, the two sides are orthogonal. Thus, in this embodiment, the predetermined direction refers to the shield set first end 5011 extending vertically downward and to the left or right to form the shield set second end 5012. In a socket including a plurality of shield plates 5, a shield set 501 having a substantially L-shape is formed in a direction in which the second ends 5012 of the shield set are arranged and a direction perpendicular to the direction in which the first ends 5011 of the shield set are arranged. Further, the recess space is used for installing the signal group 601 in a matching manner, that is, the extending direction of the recess space needs to be approximately consistent with the direction of the signal group 601 to be matched, and the direction of the signal group 601 needs to avoid straight corners, through holes and the like, because the abrupt change point of the impedance is the abrupt change point of the signal group 601. Thus, optionally, as shown in fig. 8, the included angle between two adjacent segments is obtuse, as illustrated by the three-segment recess space (L1, L2, L3), or in some other embodiments, the predetermined direction in which the first end 5011 of the shielding set extends to form the second end is arcuate. That is, the predetermined direction in which the first ends 5011 of the shielding sets extend is required to be sufficient to avoid the abrupt impedance change of the signal sets 601 matched with the shielding sets, and all the "predetermined direction" mentioned below in the present application shall be applied to the description herein.
In particular, the shield system in the header and the receptacle need to be interconnected to form a complete ground loop. Referring to fig. 2-7, in this embodiment, each of the first shield set ends 5011 of the receptacle is in electrical contact with the plug, it will be appreciated that a corresponding plug shield 80 is also provided within the plug, and more particularly, as shown in the enlarged detail view of fig. 5, the first shield set ends 5011 of the receptacle are electrically connected to the shield of the plug, and optionally, the shield of the plug is substantially the same shape as the first shield set ends 5011, and the plug is connected to the receptacle to form shield contacts and signal contacts.
In this embodiment, referring to fig. 11, since the wing portions 5014 of the adjacent shield groups 501 are higher than the surface of the intermediate portion 5013, and the recessed space defined in common with the plane of the intermediate portion 5013 is used for mounting the jack signal group 601, a three-sided shield structure is formed, which shields crosstalk of the adjacent signal group 601 at the time of high-speed signal transmission.
It should be noted that the recess space referred to herein is a three-sided shield structure formed by two adjacent wing portions 5014 as side surfaces and the middle portion 5013 as a solid bottom surface, so that the solid bottom surface of the middle portion 5013 serves as a portion of the return path for the return current.
Here, with respect to one shield piece 5, the "middle portion 5013" of different shield groups 501 is located on the same shield substrate 50, and the material of the shield substrate 50 is the same as that of the shield group first end 5011 and the shield group second end 5012. As an example of the structure of the shielding plate 5, a plurality of shielding group first ends 5011 are electrically connected to one vertical surface of the shielding substrate 50 side by side, and all corresponding shielding group second ends 5012 are electrically connected to the other vertical surface 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 a shield substrate 50 without the wing portions 5014, the return current of the second end 5012 of the shielding group can flow on any path on the planar shield substrate 50 and back to the first end 5011 of the shielding group, i.e. the solid bottom surface of the aforementioned middle portion 5013 belongs to a part of the shield substrate 50.
Therefore, the middle portion 5013 of the present application is described only for dividing the shield groups 501 for convenience, and it should not be understood that the middle portions 5013 of the shield groups 501 are separated and independent from each other, and are understood to correspond to the areas defined by the first end 5011 and the second end of the shield groups on the shield substrate 50, and of course, for the following embodiments of the lead-in wings 5014, the middle portion 5013 is understood to correspond to the areas defined by the first end 5011 and the second end of the shield groups and the wings 5014 on the shield substrate 50.
In this case, the recessed space referred to in the present application can be understood as a three-sided shield structure in which the wing portions 5014 of two adjacent shield groups 501 face each other as side surfaces and the shield substrate 50 as a solid bottom surface, and the solid bottom surface of the shield substrate 50 serves as a part of a return path for return current.
Thus, the spacing of the shield sets 501 can be understood to be the spacing between the shield set first ends 5011, or the shield set second ends 5012, or the wings 5014 of the intermediate portions 5013 of adjacent shield sets 501, and since the spacing accommodates the jack signal sets 601 matching the shield sets 501, the spacing of the shield sets 501 making up the same shield plate 5 is generally the same, and the specific dimensions of the spacing are not limited in this application, as long as the spacing accommodates the signal sets 601.
The plurality of fins 5014 are bent to a predetermined height in the predetermined direction to isolate the adjacent signal groups 601 from each other, and shield the adjacent signal groups 601 from crosstalk in the direction along the plane a of the shield substrate 50.
It should be understood that the shielding set 501 is disposed between adjacent signal sets 601 for shielding and isolating each signal set 601, so as to reduce mutual crosstalk between signals of the adjacent signal sets 601, thereby helping to improve stability, reliability and anti-interference capability of the electrical connector during data transmission.
As for the design of the path of the return current, in the intermediate portion 5013 of the different shield group 501, the portions where the wings 5014 are not formed communicate with each other, and it is understood that the "portions where the wings 5014 are not formed" is the solid shield substrate 50. The direction of signal current flow, which is opposite to the direction of return current flow, the jack signal group 601 and the plug signal group 601 are electrically connected to transmit signals, the direction of signal current flow being directed from the transmitting end to the receiving end, and the return current flow being switchable through a different path formed on a portion of the intermediate portion 5013 where the wings 5014 are not formed, in the vicinity of the impedance discontinuity region on the current path, thereby alleviating the influence of the impedance discontinuity. The interconnection between the shield sets 501 changes the return current loop inductance and reduces the inductive discontinuities experienced by the signal, thereby improving signal transmission, reducing insertion loss ripple and improving resonance.
As for the formation of the wing portions 5014, it is understood that the cut grooves 5015 are formed in the intermediate portion 5013, and the wing portions 5014 are formed by lifting or bending the cut grooves 5015, and one end thereof is fixed to the intermediate portion 5013 or the shield substrate 50) and the other end thereof is movable with respect to the intermediate portion 5013. The shape of the wing 5014 is not particularly limited in the present application, and the shape of the cut slot 5015 is determined by the shape of the predetermined wing 5014, for example, the wing 5014 is an inverted trapezoid with a fixed upper bottom and a movable lower bottom, the corresponding cut slot 5015 is a trapezoid with an upper bottom, or the wing 5014 is a rectangle with one side fixed to the shielding substrate 50 and the opposite side movable relative to the shielding substrate 50, and the corresponding cut slot 5015 is a rectangle with the other side fixed to the fixed end. Optionally, the heights H1 of the wing portions 5014 between different shielding groups 501 are the same relative to the shielding substrate 50, which is convenient for batch processing and uniformity of shielding effect, and meanwhile, generally, a 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 processing, by blanking, wire cutting along the predetermined direction, or because the extending directions of the shield groups 501 are the same, a mask is made to etch a cut groove 5015 having a corresponding shape, and a wing portion 5014 fixed at one end and movable relative to the shield substrate 50 is formed by bending, and defines a concave mounting space of the signal group 601 together with the middle portion 5013, thereby avoiding crosstalk between adjacent signal groups 601. Furthermore, due to the design and the processing technology of the wing part 5014, compared with the existing stamping technology, the processing technology is higher in accuracy, the surface processing can well avoid impedance discontinuity caused by local stretching of the surface of the shielding substrate 50, and the yield is high; the fins 5014 between the plurality of shield sets 501 have good consistency, specifically, the fins 5014 between the plurality of shield sets 501 have good height consistency, and the length of the fins 5014 can be processed with more accurate precision. While the middle portions 5013 of the different shield sets 501 in the adjacent signal set 601 and the spacing of the same shield set 501 are located on the same plane, it can be understood that the spacing of the wings 5014 is a solid portion, and the adjacent shield sets 501 are connected by the shield substrate 50 at the spacing of the wings 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, the loop self-inductance is favorably reduced, the inductive sudden change 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 path, the impedance of each area on the shielding substrate 50 is more controlled, the insertion loss fluctuation and the resonance are favorably reduced, and the signal transmission 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 plate 5 of the present application, and optionally, the return signal does not pass through on the plane of the shielding substrate 50 along a path perpendicular to the extending direction of the shielding group 501. Specifically, the actual portions of the shield substrate 50 between the spaced apart wing portions 5014 are not collinear with the intermediate portions 5013 of adjacent shield groups 501. Thus, referring to fig. 13, in one embodiment, the wings 5014 of adjacent shielding groups 501 may be offset, for example, the former shielding group 501 is bent to form a portion without the shielding substrate 50, the latter shielding group 501 corresponds to a portion including the shielding substrate 50 at the same position, and so on, and a structure in which the wings 5014 are offset from each other is formed between the adjacent shielding groups 501 on the whole shielding sheet 5 to form the zigzag connected shielding substrate 50. In another embodiment shown in fig. 5, the size of the wings 5014 is not uniform between adjacent shield sets 501, it being 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 shield substrate 50. For example, the wings 5014 of the previous shielding group 501 are twice the length of the wings 5014 of the subsequent shielding group 501, so that the portion of the unshielded substrate 50 of the previous shielding group 501 along a path perpendicular to the extension direction of said shielding group 501 corresponds to the portion of the shielded substrate 50 of the adjacent wing 5014 of the subsequent shielding group 501. In this embodiment, alternatively, the former set 501 of shields 501 comprising the shield blades 5 may comprise an alternating arrangement of larger wings 5014 and the latter set 501 of shields 501 may comprise relatively smaller wings 5014. Of course, in another embodiment, the wings 5014 of the same shield 501 are not uniform in length, and alternatively, the wings 5014 of the same shield 501 may be alternately sized.
In this embodiment, the shield group first end 5011, the intermediate 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 signal needs to pass, the return signal does not pass through in a direction perpendicular to the predetermined direction, which is equivalent to increasing the nodes of the return network, i.e., increasing the return path of the return current, so that all signal pairs have complete and closest 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 whether the shield plate 5 embodiment of fig. 8 or the shield plate 5 of the "blind" form shown in the embodiment of fig. 12, the shield substrate 50 forms more coplanar current return paths, which is beneficial to reduce the loop self-inductance, so that the transient impedance change faced by the return signal is smaller.
It should be noted that the shield sheet 5 proposed in the present application is provided with the function of achieving electromagnetic isolation between adjacent signal groups 601 in the planar direction of the shield substrate 50 by bending the wing portions 5014 to a predetermined height, and since the wing portions 5014 are formed on the shield substrate 50, the portions where the wing portions 5014 are not formed form a plurality of paths of return current lying in the same plane, the area of impedance discontinuity on the shield substrate 50 can be improved. And since the wing portion 5014 is formed on the shield substrate 50 through which the return current passes, it is possible to form more paths of the return current on the shield substrate 50 by setting the position and size of the wing portion 5014 more freely. It is understood that the functions of the present application of avoiding crosstalk between adjacent signal groups 601 and managing resonance are performed by the same shield substrate 50.
In addition, it is understood that the adjacent shielding groups 501 are not completely connected or completely isolated in the portion on the shielding substrate 50. For example, since the wings 5014 of the shielding groups 501 on the shielding substrate 50 are spaced in a predetermined direction, so that the shielding substrate 50 at the spacing has limited communication with the adjacent shielding groups 501 and is a component of the path of the return current, alternatively, the wings 5014 of the same shielding group 501 are spaced at the same interval, which is advantageous for suppressing the discontinuity of the impedance.
Further, it can be understood that since the wings 5014 need to be spaced to form a return current path, and as for the shielding effect, generally, due to the relative closeness of the adjacent signal groups 601, the relative closeness is weak, the effect of preventing crosstalk between the adjacent signal groups 601 may be reduced, and in the embodiment where the wings 5014 are not consistent in size in fig. 12 and 13, the length of the wings 5014 along the predetermined direction may not exceed 4mm at most, which can satisfy both good crosstalk prevention and better management of resonance.
To further illustrate the design of the shield plate 5 of the present application, the following description will be made of the installation of the shield plate 5 in cooperation with the signal group 601. Referring to fig. 16 or fig. 18, there are shown the assembly diagrams of the shielding plate 5 shown in fig. 8 and the set 601 of the socket signals of the shielding plate 5 shown in fig. 12, respectively. As shown, the signal sets 601 are first combined with the insulator 60, and are typically integrally molded in an injection molding manner to form an integral row of signal sets 601; of course, a plastic member having a jack for engaging with the signal set 601 may be formed, and the signal set 601 may be attached to the jack to form the entire row of signal sets 601. The entire row of signal groups 601 is then detachably mounted to the shield plates 5. Alternatively, the means for detachable attachment herein include, but are not limited to, snap-fit, plug-in, weld, and rivet. Preferably, the insulator 60 includes a plurality of grooves matching the wings 5014 of the shield 5, and the wings 5014 of the shield 5 are inserted into the grooves of the insulator 60. In particular, in the prior art, two opposite shielding sheets 5 are used to form a four-side shielding structure, and in order to assemble and fix the shielding sheets 5 and the signal group 601, a flap is usually formed on one of the shielding sheets to be assembled and fixed with the signal group 601.
Specifically, taking the signal group 601 including two differential signal pins as an example, the two differential signal pins in a pair are matched with the recessed space of the three-sided shield defined by the middle portion 5013 corresponding to the wing portions 5014 of the adjacent shield group 501, the recessed space can be seen in fig. 19, and the differential signal pins include first ends and second ends formed by extending the first ends in a predetermined direction. It will be appreciated that the direction of extension of the differential signal pin first ends is substantially the same as the direction of extension of the shield set first ends 5011. It should be noted that, from the viewpoint of the production process, it is generally understood by those skilled in the art that the shape of the shielding plate 5 is designed according to the shape of the signal group 601, that is, the predetermined direction described in the present application, and it is also understood that the first end 6011 of the signal group designed to be provided with the shielding plate 5 extends to form the predetermined direction of the second end.
For the signal group 601 and the material of the shielding group 501, since the contact portions of the shielding group 501 and the signal group 601 exist at the first end and the second end, a conductive material such as a copper alloy is usually optionally used, and in order to improve the conductivity, in an embodiment, tin or lead-tin electroplating may be used.
The differential signal pin first end is collinear with the shield set first end 5011 in the horizontal direction as shown in fig. 15; correspondingly, optionally, the height H2 of the shield set second end 5012 relative to the shield substrate 50 coincides with the height H1 of the wing 5014 relative to the shield substrate 50, and the second ends of the differential signal pins are aligned in the same line with the shield set second end 5012, or more specifically, in the side view of fig. 19, the projection in the vertical direction coincides. Thus, signal interference between adjacent signal groups 601 is isolated by the shield group 501 located therebetween in the horizontal direction as well as in the vertical direction.
Illustratively, the number of shield set second ends 5012 and signal set second ends 6012 are matched, and it is understood that the term "matched" herein refers to one signal set second end 6012 being disposed between two spaced shield set second ends 5012, and if the signal set 601 is composed of two differential signal pins as shown, two differential signal pins are disposed between two spaced shield set second ends 5012. That is, for the present application, regardless of the type or number of signal pins constituting the signal group 601, each signal group second end 6012 must be located between two spaced apart shield group second ends 5012 without considering the single-ended signal pins, i.e., each signal group second end 6012 corresponds to two shield group second ends 5012, and similarly, the number of the shield group first ends 5011 is matched to the number of the signal group first ends 6011.
It can be understood that the differential signal pins of the differential signal group 601 can transmit two signals, the two signals are close and have equal signal amplitudes, the amplitudes of the coupling electromagnetic fields between the two differential signal pins and the ground line are also equal, and at the same time, the electromagnetic fields of the two differential signal pins and the ground line have opposite signal polarities, and therefore, the differential signal pins are more suitable for transmitting signals in a high-speed circuit.
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 of the differential signal pins and the shielding group 501 and the second ends of the differential signal pins are not particularly limited, and optionally, the shielding group second end 5012 and the signal group second end 6012 are needle-shaped fish-eye structures with oval inner walls for plugging the circuit substrate to be connected. The shielding group first end 5011 and the signal group first end 6011 are elastic contact pieces having S-shaped bent portions, optionally, referring to fig. 14, the elastic contact pieces are schematically illustrated, and include a guiding section, a straight section and a dislocation section, the dislocation section is formed by bending towards one side relative to a plane where the shielding substrate 50 is located, the guiding section is used for guiding when the plug is plugged, the straight section is electrically contacted with the corresponding signal group 601 and shielding group 501 pins in the plug, and the dislocation section is used for providing a certain elastic support when the plug is plugged.
As mentioned above, the resilient contact strips contact the corresponding shielding devices in the plug to form a loop, and it can be understood that the shapes of the shielding group first end 5011 and the signal group first end 6011 depend on the number of contacts of the plug and the socket, and if the contacts are single contacts, optionally, the shapes of each of the shielding group first end 5011 and the signal group first end 6011 are straight.
It should be noted that the signal group 601 fitted to the recess space is insulated from the shield substrate 50 and the wing 5014 in the recess space, that is, the signal group 601 is not electrically contacted to the shield substrate 50 or the wing 5014 in the recess space. For example, the width of the signal group 601 is smaller than the distance between the wings 5014 of the adjacent shielding sets 501, and the first end 6011 of the signal group is provided with an insulating spacer at the matching position with the first end 5011 of the shielding set, see fig. 5, so that the signal group 601 is spaced from the shielding substrate 50, of course, the insulating spacer is a part of the insulating member 60, i.e. the insulating member 60 is pre-set with the spacer at the time of manufacturing, so that the signal group 601 does not electrically contact with the shielding substrate 50 when the signal group 601 is mounted on the shielding plate 5. Optionally, in a case that the signal group 601 and the insulating member 60 are integrally formed by injection molding, the signal group 601 is wholly 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 the plug and the circuit substrate, that is, an insulating spacer always exists between the signal group 601 and the shielding substrate 50, and the insulating spacer may be suspended from the shielding substrate 50 or the opposite shielding substrate 50. It is understood that, due to the existence of the insulating spacer blocks, the signal group 601 is disposed close to the shielding substrate 50, but is always floating with respect to the shielding substrate 50, i.e., there is no portion electrically contacting with the shielding substrate 50. The signal groups 601 are electrically independent from each other, that is, the signal groups 601 are not connected to each other.
In a second aspect, an electrical connection 4 is provided, which includes a shielding plate 5, a signal group 601, and an insulating member 60, where the shielding plate 5 may be as shown in fig. 8, or as shown in fig. 12, or as the shielding plate 5 in other possible embodiments described in this application. For convenience of explanation, referring to fig. 8 and fig. 20, the electrical connection portion a shown in fig. 15 is mounted and formed; or fig. 12 and 21, the electrical connection part B shown in fig. 17 is formed by mounting.
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 to the electrical connection portion a form a differential signal pair, and the arrangement of the signal groups 601 corresponds to fig. 20 and 21, and corresponds to the assembly of the shield sheet 5 in fig. 8 and 12. It is understood that the signal groups 601 in fig. 20 and fig. 21 are both provided with single-ended signal groups 602, specifically, the innermost side in fig. 20 has the single-ended signal group 602, and the outermost side in fig. 21 has the single-ended signal group 602, and the array of electrical connectors 4 composed of the electrical connector a shown in fig. 15 and the electrical connector B shown in fig. 17 is complementary to the single-ended signal group on both sides. Of course, in some specific embodiments, the shielding sheets 5 of the electrical connection portion a and the electrical connection portion B of all the electrical connection arrays preferably adopt the aforementioned "blind" arrangement.
Therefore, it should be noted that the recess space between adjacent shielding groups 501 is used for installing signal groups 601, and the recess space is mainly used for describing the signal group, and in combination with the above description of single-ended signals, not all signal groups 601 are disposed in the recess space, that is, not every signal group 601 matches every recess space, but every recess space matches every signal group 601.
It is understood that on the electrical connection 4, the shielding groups 501 are staggered with the signal groups 601, for example, in the form of the shielding groups 501, the signal groups 601, the shielding groups 501, and the signal groups 601.
Referring further to fig. 6, 7, 15 and 22, or 6, 7 and 17 and 22, respectively, the socket 3 includes at least one electrical connection portion 4 arranged in the same direction and a base housing 70 for accommodating the electrical connection portion 4, and a signal group second end 6012 and a shielding group second end 5012 extend from the bottom edge of the base housing 70 to be plugged onto a circuit substrate.
Each electrical connection portion 4 can be separately plugged with the plug 2 and complete signal transmission, specifically, a signal group 601 in each electrical connection portion 4 is electrically connected with a signal group 601 of the plug to transmit signals, and a shielding group 501 in each electrical connection portion 4 is electrically connected with a shielding device of the plug to form a grounding shield. It is understood that the number of signal groups 601 and shield groups 501 of the electrical connection section 4 of the socket 3 corresponds to the number of signal groups 601 and shield means in the plug, respectively.
In some embodiments for transmitting differential signals, a plurality of the electrical connections 4 are supported and limited by the socket base housing 70, the electrical connection a and the electrical connection B are respectively shown in fig. 22 and 23, and each electrical connection a and the opposite electrical connection B form the differential electrical connection 4. It should be understood that the differential signal pairs may be aligned or staggered; the alignment type, i.e., the differential electrical connection portion 4, includes electrical connection portions a and differential signal pins of the electrical connection portions B, which are in one-to-one correspondence with each other in the arrangement direction shown in the figure, and the staggering type, i.e., the differential electrical connection portion 4 includes electrical connection portions a and differential signal pins of the electrical connection portions B, which are in a certain staggering distance in the arrangement direction shown in the figure, for example, at the same position in the arrangement direction, and the differential signal of the electrical connection portion a corresponds to a part of the differential signal pins of the electrical connection portion B and a part of the shielding group 501. In general, although the differential signal pairs arranged in a staggered manner are less affected by near-end crosstalk and far-end crosstalk, the staggered distance is not as large as possible in consideration of space limitations and the influence of a certain differential signal pair on surrounding differential signal pairs, and needs to be set in accordance with specific situations. As an embodiment of the staggered arrangement: only one of the differential signal pins in each of the differential signal pairs in the opposite electrical connection portion a and the electrical connection portion B is opposite to each other along the arrangement direction, and the other differential signal pin of one of the electrical connection portions 4 is opposite to the shielding group first end 5011 of the other electrical connection portion 4; of course, it will be obvious to those skilled in the art that the specific staggered distance of the differential signal pins located in the different electrical connections 4 that make up the differential electrical connection 4 can be set as appropriate.
The base housing 70 may be formed by injection molding, the material of the socket base housing 70 and the insulating member 60 of the electrical connection portion 4 depends on the connection manner between the socket and the circuit substrate (backplane or single board), for example, the socket is attached and welded by using Surface Mount Technology (SMT), that is, all the shielding group second ends 5012 and the signal group second ends 6012 are attached and welded to the circuit substrate, the requirement on the heat resistance of the base housing 70 and the insulating member 60 is high, and crystalline materials such as Liquid Crystal Polymer (LCP) may be used. Or, due to the difficulty of forming large heat-resistant bonding areas, pressing may be used, and, optionally, in consideration of cost, the socket base housing 70 and the insulator 60 of the electrical connection portion 4 may be made of a crystalline high-grade engineering plastic, such as SPS (p-polystyrene).
The socket 3 includes a plurality of electrical connectors 4, and different electrical connectors 4 may have different signal connection manners, i.e. the electrical connectors 4 are not required to be arranged in the socket base housing 70 exactly the same way, so that different electrical connectors 4 may have different numbers of signal group second ends 6012, and thus different numbers of shielding group second ends 5012, i.e. the numbers of the signal groups 601 and the shielding groups 501 respectively included in the electrical connectors 4 are different. Accordingly, the number of concave spaces formed between the shielding groups 501 for fitting the mounting signal group 601 may be different, so that although the electrical connection portions 4 are arranged on the base housing 70 of the socket in one direction, the arrangement of the concave spaces of the adjacent electrical connection portions 4 may be staggered; or the same recess space for mounting the signal group 601 on different electrical connection portions 4, and the adjacent electrical connection portions 4 are staggered in the recess space in the arrangement direction, for example, the differential electrical connection portion 4 composed of the electrical connection portion a and the electrical connection portion B adopts the staggered differential signal pair embodiment. Illustratively, without considering the single-ended signal pins of the differential signal pairs, the former electrical connection 4 includes 2 signal groups 601 and 3 shielding groups 501, and the latter electrical connection 4 includes 5 signal groups 601 and 6 shielding groups 501; or different electrical connection portions 4 with the same number of shield groups 501 and signal groups 601 are provided, and the distribution positions of the electrical connection portions 4 are different.
Optionally, the electrical connection portions 4 included in the socket 3 are the same, and the number of the signal groups 601, the number of the shielding groups 501, and the distribution positions on the electrical connection portions 4 are the same, so that the corresponding shielding groups 501, the signal group first ends 6011, the shielding groups 501, and the signal group second ends 6012 are the same in number and the distribution positions, and the shielding groups 501 and the signal groups 601 arranged on the same straight line are formed.
It should be understood that the shielding structure and the electrical connector structure provided in the embodiments of the present application may also be applied when a single signal terminal or a plurality of signal terminals are used in practical applications.
As shown in fig. 24, the dark curve is the near end crosstalk for two pairs of differential signals mated to shield blades 5 having wings 5014 that are less than 4mm in length, and the light curve is the near end crosstalk for two pairs of differential signals mated to shield blades 5 having wings 5014 that are 5mm in length. In the frequency range of 0-20 GHz, the whole dark color curve has less crosstalk than the light color curve, the shielding performance is better, the bandwidth and the quality of signal transmission are effectively ensured, and the method is more suitable for transmission at the speed of 56Gbps and above.
It should be noted that, in the foregoing embodiment, each included module is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, the specific names of the functional units are also only for the convenience of distinguishing from each other, and are not used to limit the protection scope of the present invention.
Also, the terms "horizontal", "vertical", and the like for directional purposes are only used for convenience in describing the relative positions of the components of the present application, and do not limit the present application.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A receptacle shield blade, comprising: the shielding sets are arranged at intervals, each shielding set comprises a first end electrically contacted with the plug, a second end which is formed by extending the first end along a preset direction and is connected with the circuit substrate, and a middle part which is connected with 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 which are arranged at intervals along the preset direction;
the wing part is formed in the middle part, one end of the wing part is fixed on the middle part, and the other end of the wing part is separated from the surface of the middle part and is bent to a preset height relative to the surface of the middle part;
the concave space defined by the surfaces of the opposite wing parts and the middle parts on the two adjacent shielding groups is used for accommodating the socket signal group.
2. The jack shield blades of claim 1, wherein said shield sets first ends are vertically downwardly extending to form second ends, and wherein said shield sets are generally L-shaped.
3. The receptacle shield sheet according to claim 1, wherein the return signal does not penetrate in a direction perpendicular to the predetermined direction on the shield substrate.
4. The jack shield blades of claim 3, wherein the wings of intermediate portions of adjacent shield groups are offset in a direction perpendicular to said predetermined direction.
5. The jack shield blades of claim 3, wherein the lengths of the wing portions of the intermediate portions of adjacent shield groups are not uniform in a direction perpendicular to said predetermined direction.
6. The jack shield blades of claim 3, wherein the wing portions of the same shield set are of different lengths.
7. The jack shield of claim 4, 5 or 6, wherein the maximum length of the wings is less than 4 mm.
8. An electrical connection portion comprising the socket shield plate according to claim 7, further comprising a signal group spatially fitted in the recess, and an insulating member fitted in the signal group, the signal group including a first end and a second end formed by extending the first end in the predetermined direction; the signal group is insulated from the shield substrate.
9. The electrical connection of claim 8, wherein the set of signals includes two differential signal pins, the signals transmitted being of opposite polarity.
10. A backplane connector receptacle comprising at least one electrical connection of claim 8 and a base housing for receiving said electrical connection.
CN202121189101.XU 2021-05-31 2021-05-31 Socket shielding sheet, electric connection part and back plate connector socket Active CN215184850U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121189101.XU CN215184850U (en) 2021-05-31 2021-05-31 Socket shielding sheet, electric connection part and back plate connector socket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121189101.XU CN215184850U (en) 2021-05-31 2021-05-31 Socket shielding sheet, electric connection part and back plate connector socket

Publications (1)

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