Connection structure applied to crosstalk suppression of electric connector

Abstract

The utility model relates to a connecting structure applied to crosstalk suppression of an electric connector, the electric connector comprises a connecting piece and a plurality of contact pieces, the contact pieces serve as ground structures, at least one pair of differential lines of the electric connector is arranged between every two adjacent contact pieces, the connecting piece has conductivity, the connecting piece comprises an elastic piece, and the elastic piece is arranged on the ground structure. And the elastic sheet is connected with the spacer and the metal shell of the electric connector. According to the utility model, adjacent grounds are short-circuited through a simple metal structure, so that reverse currents in the grounds at the left and right sides of the same pair of differential lines are mutually counteracted, the corresponding current intensity in the ground structure is reduced, and the crosstalk of the differential lines to adjacent differential lines is reduced.

Description

Technical Field

[0001] The present application relates to a connection structure for suppressing crosstalk in an electrical connector, and belongs to the technical field of electrical signal transmission equipment. Background Art

[0002] For electrical connectors, low crosstalk between signal lines is a prerequisite for ensuring high-speed signal transmission. As the power density and transmission rates of high-speed connectors increase, the spacing between signal lines within the connectors becomes increasingly smaller, leading to increasingly severe crosstalk between signal lines. For example, some electrical connectors primarily utilize differential signals, with adjacent differential signals isolated by ground structures. This ground structure allows differential pairs to interact with each other, easily leading to crosstalk.

[0003] Specifically, in an ideal differential transmission line, the two conductors (positive differential line and negative differential line) should have the same characteristic impedance and match the impedance of the signal source and load. In reality, due to the structure and design of high-speed connectors, the differential transmission lines cannot achieve perfect characteristic impedance matching. When the characteristic impedance of the differential line does not match, the signal will encounter reflection and transmission loss during transmission, affecting the integrity of the signal. When the signal encounters an impedance discontinuity on the transmission line, part of the signal will be reflected back, forming a standing wave. At certain frequencies, the standing wave phenomenon may cause the voltage and current on the transmission line to reach a resonant state, that is, resonance. Due to the existence of standing waves and resonance, the signal on the differential line may affect the adjacent differential line through the ground structure. This effect is usually due to the discontinuity or unevenness of the ground structure, resulting in crosstalk when the signal propagates in the ground structure.

[0004] Existing solutions to the aforementioned crosstalk problem include increasing the spacing between differential pairs, adding specialized ground structures (such as electromagnetic band gaps) within high-speed connectors, and adding metal shielding structures. Due to the high power density of high-speed connectors, increasing the spacing between differential pairs and improving crosstalk are limited. Furthermore, specialized ground structures and metal shielding structures pose challenges to the design and manufacturing of high-speed connectors. Utility Model Content

[0005] The present invention provides a connection structure for crosstalk suppression in electrical connectors, aiming to address at least one of the technical problems existing in the prior art. For example, the connection structure for crosstalk suppression in electrical connectors proposed by the present invention uses a simple metal structure to short-circuit adjacent ground planes, thereby canceling out the reverse currents in the ground planes on the left and right sides of a pair of differential lines. This reduces the corresponding current intensity in the ground plane structure and reduces crosstalk between adjacent differential lines.

[0006] The technical solution of the present utility model relates, on one hand, to a connection structure for suppressing crosstalk in an electrical connector, which comprises:

[0007] A plurality of spacers serving as a ground structure, wherein at least one pair of differential lines of the electrical connector is provided between two adjacent contact members;

[0008] A conductive connecting piece includes a spring piece, and the spring piece connects the spacer and the metal shell of the electrical connector.

[0009] Furthermore, a plurality of the elastic sheets are provided, and each of the elastic sheets is connected to one side of each of the spacers.

[0010] Furthermore, one side of the elastic sheet protrudes from the spacer to contact the metal shell.

[0011] The technical solution of the present utility model also relates to a connection structure for suppressing crosstalk in an electrical connector, comprising:

[0012] A plurality of spacers serving as a ground structure, wherein at least one pair of differential lines of the electrical connector is provided between two adjacent contact members;

[0013] A conductive connecting member includes a plurality of elastic touch panels and a connecting plate connecting the plurality of elastic touch panels, and each of the elastic touch panels is connected to one side of each of the spacers.

[0014] Furthermore, the electrical connector includes a plastic component, and the connecting plate is connected to the plastic component.

[0015] Furthermore, the elastic touch panel includes two long plates, and one end of the two long plates is connected to form a contact position that touches the spacer.

[0016] Furthermore, a chamfer is provided on a side of the elastic touch plate away from the connecting plate.

[0017] Furthermore, the connecting plate is provided with a connecting protrusion that allows abutment with the plastic component.

[0018] Furthermore, the connecting plate is provided with a connecting through hole, and the connecting plate is fixed to the plastic part through a connecting column that cooperates with the connecting through hole.

[0019] The technical solution of the present utility model also relates to a connection structure for suppressing crosstalk in an electrical connector, comprising:

[0020] A plurality of spacers serving as a ground structure, wherein at least one pair of differential lines of the electrical connector is provided between two adjacent contact members;

[0021] A conductive connecting piece includes a line card board, and the line card board is clamped with the plurality of spacers.

[0022] The beneficial effects produced by the technical solution of the present utility model are at least as follows.

[0023] This new connection structure for crosstalk suppression in electrical connectors utilizes the principle that the ground currents on the left and right sides of a differential line have opposite directions. By short-circuiting the grounds on both sides, the opposing currents in the ground cancel each other out, thereby reducing the resonant current in the ground structure of a high-speed connector. By short-circuiting adjacent grounds using a simple metal structure, the opposing currents in the ground on the left and right sides of a pair of differential lines cancel each other out, reducing the corresponding current intensity in the ground structure and lowering crosstalk between adjacent differential lines. This structure achieves crosstalk suppression in electrical connectors by adding a simple connector that short-circuits two contacts with opposing currents. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a spacer and a spring piece of an electrical connector according to an embodiment of the present utility model.

[0025] Figure 2 It is a structural cross-sectional view of a spacer and a spring piece of an electrical connector according to an embodiment of the present invention.

[0026] Figure 3 It is a structural exploded view of the spacer and the spring of the electrical connector according to an embodiment of the present invention.

[0027] Figure 4 It is a front view of the structure of the spacer and the spring in the embodiment of the present utility model.

[0028] Figure 5 It is a structural schematic diagram of a spacer and a resilient contact plate of an electrical connector according to an embodiment of the present utility model.

[0029] Figure 6 Schematic diagram of the structure of the elastic contact plate and the plastic component of the electrical connector according to an embodiment of the present invention.

[0030] Figure 7 It is a structural cross-sectional view of a spacer and a resilient contact plate of an electrical connector according to an embodiment of the present invention.

[0031] Figure 8 yes Figure 7 Enlarged schematic diagram of point A in the middle.

[0032] Figure 9 It is a structural schematic diagram of the elastic touch panel and the connecting plate according to an embodiment of the present utility model.

[0033] Figure 10 It is a structural schematic diagram of a spacer and a line card board of an electrical connector according to an embodiment of the present utility model.

[0034] Figure 11 It is a schematic structural diagram of a circuit board according to an embodiment of the present utility model.

[0035] Figure 12 The figure is a simple diagram showing the direction of current flow inside the electrical connector according to an embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 100, electrical connector; 110, metal shell; 120, plastic part; 121, positioning auxiliary groove; 130, circuit board; 140, conductive part; 150, transmission cable; 151, differential line; 152, shielding part;

[0038] 200, contact member; 210, spacer; 220, gasket;

[0039] 300, connector; 310, spring; 320, elastic contact plate; 321, long plate; 322, connecting plate; 323, connecting protrusion; 324, contact position; 325, chamfer position; 330, line card board. DETAILED DESCRIPTION

[0040] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments herein can be combined with each other unless there is a conflict.

[0041] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. In addition, the terms "upper," "lower," "left," "right," "top," and "bottom" used herein refer only to the relative positions of the components of the present invention as shown in the accompanying drawings.

[0042] In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used herein includes any combination of one or more of the related listed items.

[0043] It should be understood that although the terms first, second, third, etc. may be used to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from each other. For example, a first element may also be referred to as a second element, and similarly, a second element may also be referred to as a first element without departing from the scope of the present disclosure.

[0044] See also Figures 1 to 12The present invention provides a connection structure for suppressing crosstalk in an electrical connector, comprising a connector 300 and a plurality of contacts 200. The contacts 200 serve as ground structures, with at least one pair of differential lines 151 of the electrical connector 100 disposed between two adjacent contacts 200. The connector 300 is conductive and includes a spring 310 that connects any two adjacent contacts 200. The present invention electrically connects the adjacent contacts 200 serving as ground structures on both sides of the same pair of differential lines 151 through the connector 300. This short-circuit of adjacent grounds is achieved through a simple metal structure, allowing reverse currents in the grounds on the left and right sides of the same pair of differential lines 151 to cancel each other out, reducing the corresponding current intensity in the ground structures and lowering the crosstalk from a differential line 151 to adjacent differential lines 151.

[0045] See also Figure 1 The electrical connector 100 includes a plug assembly and a receptacle assembly. The plug assembly connects to the receptacle assembly to achieve signal transmission. Specifically, the plug assembly is used to connect to a transmission cable 150, which is connected to one end of a conductive member 140 in the plug assembly. The receptacle assembly is used to connect to a circuit board 130, which is connected to a gasket 220 in the receptacle assembly. When the plug assembly is inserted into the receptacle assembly, the other end of the conductive member 140 connects to the gasket 220, thereby achieving signal transmission.

[0046] See also Figure 1 and Figure 11 , the two contacts of the circuit board 130 as a differential pair are respectively connected to one end of the two conductive members 140 (as a group of conductive members 140), and the transmission cable 150 is provided with two signal lines as a group of differential lines 151. The other ends of the two conductive members 140 are respectively connected to the two signal lines in the transmission cable 150. The present invention selects the grounding of the shielding structure in the transmission cable 150, wherein the shielding layer is wrapped in the outermost insulating layer of the transmission cable 150, and an insulating medium is provided between the signal line and the shielding layer. The contacts in the circuit board 130 are correspondingly arranged so that each differential pair is spaced apart from each GND ground, that is, two ground contacts (see Figure 12 A pair of differential contacts are set between the GND in the circuit.

[0047] In some embodiments, both the plug assembly and the receptacle assembly are internally provided with a spacer 210 serving as a ground structure. Multiple spacers 210 are spliced ​​together to form an independent space that serves as a shield. Each set of conductive members 140 is disposed in an independent space, which can enclose and separate the conductive members 140, effectively shielding against interference. The spacers 210 in the high-speed connector include a plug spacer 210 and a receptacle spacer 210. The spacers 210 are connected to the ground point of the circuit board 130. A pair of differential lines 151 is embedded between the two spacers 210 serving as the ground structure of the electrical connector 100. See FIG. Figure 12The red arrow in (Brief Description) represents the direction of the ground current, and the current directions of the two adjacent grounds in the same pair of differential lines 151 in the high-speed connector are opposite. Due to the influence of the structure and design of existing high-speed connectors, the differential transmission lines cannot achieve perfect matching of characteristic impedances. Therefore, it is easy to form a standing wave phenomenon in the ground structure, that is, resonance, which causes the differential line 151 to attack the adjacent differential line 151 and other differential lines 151 through the ground structure, thereby forming crosstalk. Among them, the differential line 151 that is closest to the ground is most affected by the crosstalk. When the signal in the differential line changes, a return current will be generated in the ground structure. It can be understood that when the differential signal current flows through a structure with mismatched characteristic impedance, the signal current (including the current in the signal path and the signal return path) may produce reflection. See Figure 11 In the present invention, the signals are distributed at equal intervals according to GSSD (i.e., in the order of GND, differential signal +, differential signal -, and GND). There is a ground structure around the differential signal line, and even the ground structure is close to the differential signal line. Then, corresponding currents will inevitably be generated in the ground structure. Then, the currents flowing through the four GSSD paths are the same in magnitude, and the current directions of adjacent conductors are opposite.

[0048] Specifically, crosstalk can cause the signal in the differential line to induce current in the adjacent differential line and ground structure. This induced current may form a loop in the ground structure, especially in places where the ground structure is uneven or there is impedance discontinuity. That is, if the ground structure is discontinuous or there is impedance mismatch, these return currents may form a loop in the ground structure, causing the current directions of adjacent ground structures in the same pair of differential lines to be opposite. Among them, adjacent differential pairs will share a single-side signal return path, for example Figure 11 For differential pair 1 and differential pair 2, if differential pair 1 experiences current fluctuations due to discontinuity in the structure or characteristic impedance in actual applications (high-frequency currents can vary with time and space, and the current fluctuations mentioned here refer to fluctuations relative to normal currents), the fluctuating current in differential pair 1 can interfere with differential pair 2 through the adjacent GND. At the same time, the electromagnetic field generated by the changing current is more likely to escape from the field source, be emitted through space, and couple to other differential pairs.

[0049] This utility model uses a connector 300 to electrically connect two adjacent contact members 200 serving as ground structures. This simple metal structure short-circuits the adjacent grounds, allowing the reverse currents in the left and right grounds of a pair of differential lines 151 to cancel each other out, reducing the corresponding current intensity in the ground structure and lowering the crosstalk from a differential line 151 to adjacent differential lines 151. It should be noted that the location for short-circuiting adjacent ground structures can be anywhere, with shorting the standing wave point providing the best crosstalk reduction effect.

[0050] In some embodiments, the electrical connector 100 includes a connector 300, a metal shell 110, and a plurality of spacers 210 serving as contacts 200. The connector 300 connects the metal shell 110 and the spacers 210. Figures 1 to 3 The metal shell 110 is the conductive metal base of the receptacle assembly. The contact 200 is a spacer 210 used to separate the conductive member 140 in the plug assembly. The spacer 210 is connected to the ground point of the circuit board 130 and serves as the ground conductor (i.e., the ground structure) of the electrical connector 100. When the plug assembly is inserted into the receptacle assembly, the spacer 210 enters the inner cavity of the metal shell 110. By adding a connector 300 to the side of the spacer 210, the connector 300 contacts the metal shell 110, shorting the spacer 210 and thus shorting the adjacent ground structures.

[0051] In some specific embodiments, the connector 300 may include multiple conductive springs 310, such as metal springs 310. One side of each spring 310 is connected to a side edge of the septum 210, which is equivalent to a branch growing on the side edge of the septum 210 serving as the ground structure. The other side of the spring 310 is allowed to elastically contact the metal base, thereby short-circuiting the ground structure. It is understood that a spring 310 can be connected to each of the two opposite sides of the septum 210, so that both sides of the septum 210 are electrically connected to the metal shell 110. It should be noted that the septum 210 and the spring 310 can be an integrated structure.

[0052] In some specific embodiments, the contact member 200 is a plurality of spacers 210, which are arranged side by side. A conductive member 140 connected to the same pair of differential signals of the transmission cable 150 is placed between two spacers 210, and the spacer 210 is connected to the ground of the transmission cable 150. Figure 2 and Figure 4 The spacer 210 is a plate-shaped structure, the spring piece 310 is an elongated plate, the upper end of the spring piece 310 is connected to the outer lower end of the spacer 210, and the lower end of the spring piece 310 protrudes from the spacer 210 to be connected to the metal shell 110.

[0053] Here is a specific example to illustrate, see Figures 1 to 4 The plug assembly includes a plug housing and a plurality of spacers 210. The plug housing can be a plastic shell. The socket assembly includes a socket housing. The socket housing can be a metal shell 110. The insertion end of the plug housing is provided with a positioning auxiliary groove 121 (see Figure 6), the spacer 210 is disposed in the plug housing, and the spring piece 310 is disposed outside the end of the spacer 210 near the insertion end of the plug housing, so that the spring piece 310 can pass through the positioning auxiliary slot 121 and be exposed in the plug housing. When the plug assembly is inserted into the receptacle assembly, the plug housing enters the receptacle housing, and the exposed spring piece 310 can contact the receptacle housing, thereby connecting the spacer 210 and the metal shell 110 through the spring piece 310, thereby short-circuiting adjacent spacers 210 as the ground structure.

[0054] In some embodiments, the electrical connector 100 includes a connector 300 and a plurality of spacers 210. The connector 300 connects the plurality of spacers 210, thereby short-circuiting the plurality of spacers 210 as a ground structure. Furthermore, the connector 300 includes a plurality of elastic contact pads 320 and a connecting plate 322 connecting the plurality of elastic contact pads 320. The number of elastic contact pads 320 matches the number of spacers 210, and each elastic contact pad 320 is connected to one side of each spacer 210. Figure 5 and Figure 9 The connecting plate 322 is in the shape of a long strip, and multiple elastic contact plates 320 are connected to the same long side of the connecting plate 322. When the elastic contact plate 320 contacts two adjacent spacers 210, the adjacent spacers 210 are short-circuited through the connecting plate 322, thereby short-circuiting two adjacent grounds with opposite current directions.

[0055] In some embodiments, the connecting plate 322 can be fixed to the plastic component 120 of the electrical connector 100. Figure 6 and Figure 7 The plug housing is a plastic shell. The connecting plate 322 can be fixed to the outside of the plug housing. The spacer 210 is arranged in the plug housing. The insertion end of the plug housing is provided with a positioning auxiliary groove 121. The upper side of the elastic contact plate 320 is connected to the connecting plate 322, and the lower side of the elastic contact plate 320 passes through the positioning auxiliary groove 121 and contacts the side of the spacer 210. Among them, a connecting through-hole is provided on the connecting plate 322, and the connecting plate 322 is fixed to the plastic part 120 (such as the plug housing) by the connection column (such as a screw) and the connecting through-hole. Furthermore, the connecting through-hole can also be deformed and inserted into the plastic part 120 by a jig. Furthermore, by dripping molten plastic or strong glue into the connecting through-hole, the connecting plate 322 is attached to the plug housing, thereby making the connection more secure.

[0056] In some specific embodiments, the elastic contact plate 320 includes two long plates 321, one end of the two long plates 321 is connected to form a contact position 324 that contacts the spacer 210. Figure 8 and Figure 9The two long plates 321 are connected at one end to form a recessed portion, with the recessed portion's opening facing away from the spacer 210. The lower side of the recessed portion forms a contact portion 324 that contacts the spacer 210. When the connecting plate 322 is connected to the plug housing, the connecting plate 322 and the long plate 321 on the upper side tilt outward from bottom to top, causing the contact portion 324 to protrude from the connecting plate 322 toward the plug housing. This secures the connecting plate 322 to the plug housing, while allowing the contact portion 324 to pass through the positioning auxiliary slot 121 and contact the spacer 210.

[0057] In some specific embodiments, see Figure 6 and Figure 9 The connecting plate 322 is provided with a connecting protrusion 323, which protrudes toward the side closest to the plug assembly. The connecting protrusion 323 is inserted into the plug housing to connect the connector 300 to the plug assembly. When the plug assembly is inserted into the receptacle assembly, the portion of the elastic contact plate 320 protruding from the plug housing is squeezed by the receptacle housing and contracts inward, causing the contact portion 324 to make stress contact with the partition 210, thereby ensuring a more stable and reliable ground shorting effect of the connector 300.

[0058] In some embodiments, see Figure 10 The connector 300 includes a wire clip 330, which contacts multiple spacers 210 to short-circuit the ground structures with opposite currents. Specifically, the wire clip 330 can be a metal plate. The shielding layer of the transmission cable 150 is connected to the wire clip 330 via the shielding member 152. Multiple spacers 210 are arranged in parallel. The wire clip 330 is engaged with one side of the spacers 210 to short-circuit the spacers 210.

[0059] In the connection structure for crosstalk suppression in an electrical connector according to this practical embodiment, the location of the shorted ground structure by the connector 300 is to short-circuit any location in the adjacent ground structure. In some embodiments, the location of the shorted ground structure by the connector 300 is to short-circuit a resonant point in the adjacent ground structure. In some embodiments, the location of the shorted ground structure by the connector 300 is to short-circuit adjacent ground structures in the transition region. For example, in the transition region where the gasket 200 and the conductive member 140 are connected, the connection frame 340 of the connector 300 short-circuits all ground structures, thereby short-circuiting adjacent ground structures in the transition region. For example, in the transition region where the plug assembly and the receptacle assembly are connected, the spring 310 of the connector 300 short-circuits the spacer 210 and the metal shell 110, thereby short-circuiting adjacent ground structures in the transition region. For example, in the transition region where the conductive member 140 and the transmission cable 150 are connected, the line card 330 of the connector 300 short-circuits all ground structures, thereby short-circuiting adjacent ground structures in the transition region. It should be noted that the above structures are merely illustrative and not intended to be limiting.

[0060] The above description is merely a preferred embodiment of the present application. The present application is not limited to the above-described embodiments. As long as the technical effects of the present application are achieved by the same means, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. Various modifications and variations of the technical solutions and / or implementation methods may be made within the scope of protection of the present application.

Claims

1. A connection structure for suppressing crosstalk in an electrical connector, characterized in that: include: A plurality of spacers (210) as a ground structure, at least one pair of differential lines (151) of the electrical connector (100) being provided between two adjacent contact members (200); A conductive connecting piece (300) includes a spring piece (310) that connects the spacer (210) and the metal shell of the electrical connector (100).

2. The connection structure for crosstalk suppression in an electrical connector according to claim 1, characterized in that: A plurality of the elastic sheets (310) are provided, and each of the elastic sheets (310) is connected to one side of each of the spacers (210).

3. The connection structure for suppressing crosstalk in an electrical connector according to claim 2, wherein: One side of the elastic sheet (310) protrudes from the spacer (210) so as to be in contact with the metal shell (110).

4. A connection structure for suppressing crosstalk in an electrical connector, characterized in that: include: A plurality of spacers (210) as a ground structure, at least one pair of differential lines (151) of the electrical connector (100) being provided between two adjacent contact members (200); A conductive connecting member (300) includes a plurality of elastic touch panels (320) and a connecting plate (322) connecting the plurality of elastic touch panels (320), wherein each elastic touch panel (320) is connected to one side of each spacer (210).

5. The connection structure for suppressing crosstalk in an electrical connector according to claim 4, characterized in that: The electrical connector (100) includes a plastic part (120), and the connecting plate (322) is connected to the plastic part (120).

6. The connection structure for suppressing crosstalk in an electrical connector according to claim 5, characterized in that: The elastic touch plate (320) comprises two long plates (321), one end of the two long plates (321) being connected to form a contact position (324) that contacts the spacer (210).

7. The connection structure for suppressing crosstalk in an electrical connector according to claim 6, characterized in that: A chamfered corner (325) is provided on one side of the elastic touch plate (320) away from the connecting plate (322).

8. The connection structure for suppressing crosstalk in an electrical connector according to claim 6, wherein: The connecting plate (322) is provided with a connecting protrusion (323) allowing abutment with the plastic part (120).

9. The connection structure for suppressing crosstalk in an electrical connector according to claim 5, characterized in that: The connecting plate (322) is provided with a connecting through hole, and the connecting plate (322) is fixed to the plastic part (120) by means of a connecting column that cooperates with the connecting through hole.

10. A connection structure for suppressing crosstalk in an electrical connector, characterized in that: include: A plurality of spacers (210) as a ground structure, at least one pair of differential lines (151) of the electrical connector (100) being provided between two adjacent contact members (200); A conductive connector (300) includes a line card board (330) and the line card board (330) is connected to a plurality of spacers (210).

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