Electric connector

Abstract

The invention relates to an electric connector which comprises an insulator and at least one row of terminals, each row of terminals comprises a signal terminal pair and two grounding terminals located on the two sides of the signal terminal pair, and each signal terminal pair comprises two differential terminals; each terminal comprises a contact part and a pin part which are positioned at two opposite ends of the terminal, and a middle part for connecting the contact part and the pin part; the middle part comprises a fixed part fixed on the insulator and an elastic arm extending out of the insulator from the fixed part, and the contact part is formed by continuously extending from the elastic arm. The contact parts of the adjacent terminals have the same distance, the pin parts of the adjacent terminals have the same distance, the width of the fixed part of the differential terminal is smaller than that of the fixed part of the grounding terminal, and the width of the fixed part of each differential terminal is smaller than half of the width of the corresponding elastic arm, so that the resonance energy accumulation is effectively weakened, and the reliability of the electric connector is improved. And interference of resonance on differential signals is suppressed.

Description

Technical Field

[0001] The present application relates to the technical field of communication equipment, and in particular to an electrical connector. Background Art

[0002] Resonance is a key issue that needs to be addressed in electrical connector design. Reducing resonance in high-frequency signal transmission is becoming increasingly challenging. Related technologies typically use grounding components to reduce the impact of resonance on signals. These components connect all ground terminals together, thereby reducing the impact of resonance on high-frequency signals. However, crosstalk between signal terminals still exists. Summary of the Invention

[0003] In view of this, the present application provides an electrical connector capable of improving the signal crosstalk problem between differential terminals.

[0004] An embodiment of the present application provides an electrical connector comprising an insulator and at least one row of terminals, each row of terminals comprising a signal terminal pair and two grounding terminals located on either side of the signal terminal pair, each signal terminal pair comprising two adjacently arranged differential terminals; each terminal comprising a contact portion and a pin portion located at opposite ends thereof, and an intermediate portion connecting the contact portion and the pin portion; the intermediate portion comprising a fixed portion fixed to the insulator and an elastic arm extending from the fixed portion, the contact portion being formed by further extending from the elastic arm, the contact portion being provided with a contact point for contacting a mating element. The contact portions of adjacent terminals have the same spacing, the pin portions of adjacent terminals have the same spacing, the width of the fixed portion of the differential terminal is smaller than the width of the fixed portion of the grounding terminal, and the width of the fixed portion of each differential terminal is less than half the width of its corresponding elastic arm.

[0005] In some optional embodiments, each differential terminal is provided with an inner edge adjacent to another differential terminal and an outer edge adjacent to the ground terminal, and the differential terminal is provided with a material removal groove at its outer edge, so that the width of the fixed portion of the differential terminal is less than half the width of its corresponding elastic arm.

[0006] In some optional embodiments, the width of the elastic arm of the ground terminal is the same as the width of its corresponding fixing portion.

[0007] In some optional embodiments, the width of the elastic arm of the differential terminal is smaller than the width of the elastic arm of the ground terminal.

[0008] In some optional embodiments, each differential terminal has a first central axis, the contact portion and the pin portion of each differential terminal are symmetrical about the first central axis, and the inner edge of the middle portion of the differential terminal is farther away from the first central axis than the outer edge thereof.

[0009] In some optional embodiments, each ground terminal is provided with a second central axis, and the contact portion, the pin portion, and the middle portion of each ground terminal are symmetrical about the second central axis.

[0010] In some optional embodiments, an outer edge of the fixing portion of each differential terminal and an outer edge of its elastic arm are located on opposite sides of the first central axis.

[0011] In some optional embodiments, the electrical connector further includes a grounding member disposed in the insulator, wherein a plurality of pins are punched out of the grounding member, and grounding terminals in the same row are correspondingly connected to at least one pin.

[0012] In some optional embodiments, the electrical connector further includes an absorbing member, which is disposed on the insulator. The absorbing member is disposed separately from the ground terminal, or is in partial contact with the ground terminal.

[0013] In some optional embodiments, the absorbing member includes an absorbing body and a plurality of absorbing strips extending upward from the absorbing body, the absorbing strips and the grounding terminal are arranged correspondingly along a first direction, and the extension direction of the absorbing strips is the same as the extension direction of the fixed portion of the grounding terminal.

[0014] The electrical connector provided in the embodiments of the present application significantly reduces resonance and crosstalk problems in high-frequency signal transmission by optimizing the terminal structure design. The specific technical effects are as follows: Resonance suppression: By designing the fixed part width of the differential terminal to be smaller than the fixed part width of the ground terminal, the width of the fixed part of each differential terminal is less than half the width of its corresponding elastic arm, which reduces the parasitic capacitance of the signal terminal and effectively weakens the accumulation of resonant energy. At the same time, the ground terminals on both sides form a shielding structure, further suppressing the interference of resonance on the differential signal.

[0015] Crosstalk control: Adjacent terminal contact areas and pins are arranged with equal spacing to ensure impedance consistency between the two differential terminals. Combined with the wrapped layout of the ground terminal and the signal terminal pair, near-end crosstalk between the signal terminal pairs is reduced.

[0016] Structural stability: The design of the differential terminal's elastic arm being wider than the fixed part enhances the mechanical strength of the differential terminal, while maintaining the elasticity of the contact part and improving the signal transmission reliability of the electrical connector under plugging and unplugging conditions.

[0017] This design balances electrical performance and mechanical reliability, making it suitable for high-speed data transmission scenarios. It meets the requirements of the various specifications of PCIe Gen6.0 (Peripheral Component Interconnect Express Generation 6.0), with a transmission rate of up to 64 GT / s. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the electrical connector and the circuit board according to the first embodiment of the present application, wherein the electrical connector is mounted on the circuit board.

[0019] Figure 2 yes Figure 1 3D exploded view of .

[0020] Figure 3 yes Figure 2 A perspective view of a row of terminals fixed to an insulator.

[0021] Figure 4 yes Figure 3 A partial cross-sectional view showing the positional relationship between a row of terminals and the insulator.

[0022] Figure 5 yes Figure 3 A three-dimensional diagram of the middle row of terminals and the grounding piece.

[0023] Description of main component symbols 001, electrical connector; 10, insulator; 20, terminal; 20S, signal terminal pair; 20S1, differential terminal; e1, inner edge; e2, outer edge; c1, material removal groove; L1, first central axis; 20G, ground terminal; L2, second central axis; 20B, sideband signal terminal; 20P, power optimization terminal; 21, contact portion; 211, contact point; 22, middle portion; 221, fixing portion; 222, elastic arm; 23, pin portion; 30, grounding member; 31, pin; 311, upper pin; 312, lower pin; 40, absorbing member; 41, absorbing body; 42, absorbing strip; 50, insulating body; 51, docking groove; 52, external mounting portion; 60, metal shell; 61, welding foot; 62, card slot; 002, circuit board; d1, conductive pad; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0024] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. Unless there is a conflict, the features in the following embodiments and examples can be combined with each other.

[0025] See also Figure 1 An embodiment of the present application provides an electrical connector 001, which is arranged on a circuit board 002 and realizes pluggable electrical connection and mechanical fixation by clamping the contacts of the docking components. It is commonly used for the installation and signal transmission of modular components such as memory and expansion cards.

[0026] See also Figure 2 and Figure 3The electrical connector 001 includes an insulator 10 and at least one row of terminals 20. Each row of terminals 20 includes a signal terminal pair 20S and two ground terminals 20G located on either side of the signal terminal pair 20S. Each signal terminal pair 20S includes two adjacent differential terminals 20S1. In this embodiment, the terminals 20 are arranged in two rows, with the two rows of terminals 20 facing each other along a first direction X. The terminals 20 in the same row are divided into two groups, with the two groups of terminals 20 spaced apart along a second direction Y.

[0027] In this embodiment, electrical connector 001 includes sideband signal terminals 20B and power optimization terminals 20P, located flanking a row of signal terminal pairs 20S and ground terminals 20G. Sideband signal terminals 20B are independent of the main data channel, enabling low-latency communication control in high-speed electrical connectors or interfaces. Power optimization terminals 20P are used to optimize device power supply efficiency, reduce power consumption, or dynamically adjust voltage / current. Their core function is to balance performance and energy efficiency, and they are commonly used in high-performance processors, FPGAs (Field-Programmable Gate Arrays), memory modules, and other applications.

[0028] Each terminal 20 includes a contact portion 21 and a pin portion 23 at opposite ends, and a middle portion 22 connecting the contact portion 21 and the pin portion 23. The contact portion 21 has a contact point 211 for contacting a mating component. The circuit board 002 has multiple conductive pads d1, and the pin portions 23 press against corresponding conductive pads d1 one by one, thereby establishing a conductive path.

[0029] See also Figure 3 and Figure 4 The middle portion 22 includes a fixed portion 221 and a resilient arm 222. The fixed portion 221 is fixed to the insulator 10. The resilient arm 222 extends upward from the fixed portion 221 and out of the insulator 10. The contact portion 21 further extends upward from the resilient arm 222. The contact portions 21 of adjacent terminals 20 have the same spacing, and the pin portions 23 of adjacent terminals 20 have the same spacing. The contact portions 21 and pin portions 23 of adjacent terminals 20 are arranged with equal spacing, ensuring impedance consistency between the two differential terminals 20S1.

[0030] The width W of the fixing portion 221 of the differential terminal 20S1 is S1 smaller than the width W of the fixing portion 221 of the ground terminal 20G G1 The width W of the fixed portion 221 of each differential terminal 20S1 is S1 smaller than the width W of the corresponding elastic arm 222 S2 Half of W S1 <W G1 , W S1 <½W S2By increasing the width W of the fixed portion 221 of the differential terminal 20S1 S1 Designed to be smaller than the width W of the fixing portion 221 of the ground terminal 20G G1 The width W of the fixed portion 221 of each differential terminal 20S1 is S1 smaller than the width W of the corresponding elastic arm 222 S2 The parasitic capacitance of the signal terminal 20 is reduced by half, which effectively weakens the accumulation of resonant energy. At the same time, the ground terminals 20G on both sides form a shielding structure, further suppressing the interference of resonance on the differential signal.

[0031] Furthermore, the design of differential terminal 20S1, in which the elastic arm 222 is wider than the fixed portion 221, enhances the mechanical strength of differential terminal 20S1. This design maintains the elasticity of contact portion 21 while improving the signal transmission reliability of electrical connector 001 during plugging and unplugging. This design balances electrical performance and mechanical reliability, making it suitable for high-speed data transmission scenarios and meeting the various specifications of PCIe Gen 6.0 (Peripheral Component Interconnect Express Generation 6.0), with a transmission rate of up to 64 GT / s.

[0032] In some embodiments, each differential terminal 20S1 is provided with an inner edge e1 adjacent to another differential terminal 20S1 and an outer edge e2 adjacent to the ground terminal 20G, and the differential terminal 20S1 is provided with a material removal groove c1 at its outer edge e2, so that the width of the fixed portion 221 of the differential terminal 20S1 is less than half the width of its corresponding elastic arm 222.

[0033] In some embodiments, the width W of the elastic arm 222 of the ground terminal 20G is G2 The width W of the corresponding fixing portion 221 G1 Same, that is, W G1 =W G2 , which is beneficial to improving the structural strength of the ground terminal 20G.

[0034] In some embodiments, the width W of the elastic arm 222 of the differential terminal 20S1 is S2 Smaller than the width W of the elastic arm 222 of the ground terminal 20G G2 , that is, W S2 <W G2 Reducing the width of the elastic arm 222 of the differential terminal 20S1 can reduce the coupling capacitance with the adjacent ground terminal 20G, thereby reducing signal loss and crosstalk and improving high-frequency signal integrity.

[0035] In some embodiments, each differential terminal 20S1 defines a first central axis L1. The contact portion 21 and pin portion 23 of each differential terminal 20S1 are symmetrical about the first central axis L1. The inner edge e1 of the middle portion 22 of the differential terminal 20S1 is further away from the first central axis L1 than the outer edge e2. The offset arrangement of the middle portion 22 of the differential terminal 20S1 further reduces coupling capacitance with the adjacent ground terminal 20G, thereby lowering signal loss and crosstalk and improving high-frequency signal integrity.

[0036] In some embodiments, each ground terminal 20G defines a second central axis L2. The contact portion 21, pin portion 23, and middle portion 22 of each ground terminal 20G are symmetrical about this second central axis L2. This symmetrical structure ensures uniform electromagnetic shielding across the ground terminals 20G, reducing external interference and signal radiation. Furthermore, the symmetrical layout maintains a stable ground loop impedance, preventing impedance fluctuations caused by asymmetry and improving high-frequency signal integrity.

[0037] In some embodiments, the outer edge e2 of the fixed portion 221 of each differential terminal 20S1 and the outer edge e2 of its elastic arm 222 are located on opposite sides of the first central axis L1, which is conducive to ensuring that the material removal groove c1 has sufficient depth to increase the distance between the fixed portion 221 of the differential terminal 20S1 and the fixed portion 221 of the ground terminal 20G, thereby reducing external interference and signal radiation.

[0038] See also Figure 3 and Figure 5 In some embodiments, the electrical connector 001 includes a grounding member 30 , which is disposed within the insulator 10 corresponding to a row of terminals 20 and located on the side of one row of terminals 20 facing another row of terminals 20 . The grounding member 30 is stamped with multiple pins 31 , and each of the ground terminals 20G in the same row is connected to at least one pin 31 , thereby interconnecting the multiple ground terminals 20G and forming a wrap-around layout for the signal terminal pairs 20S, thereby reducing near-end crosstalk between the signal terminal pairs 20S.

[0039] In this embodiment, the grounding member 30 is stamped with a row of upper pins 311 and a corresponding row of lower pins 312. The upper pins 311 and the corresponding lower pins 312 below them simultaneously abut the fixed portion 221 of the same ground terminal 20G. The upper and lower pins 311, 312, contact the fixed portion 221 in parallel, significantly reducing ground impedance, improving high-frequency signal integrity, and suppressing resonance and noise. Furthermore, the dual contact points 211 form a more stable ground shield, further isolating crosstalk and EMI radiation between differential pairs.

[0040] See also Figure 2 and Figure 3In some embodiments, electrical connector 001 includes an absorber 40 disposed within insulator 10 and separate from ground terminal 20G. Absorber 40 absorbs high-frequency electromagnetic interference and resonant energy, reducing noise and crosstalk during signal transmission. In another embodiment, absorber 40 partially contacts ground terminal 20G.

[0041] In some embodiments, the absorbing member 40 includes an absorbing body 41 and a plurality of absorbing strips 42 extending upward from the absorbing body 41. The absorbing strips 42 are arranged corresponding to the grounding terminal 20G along the first direction X, and the extension direction of the absorbing strips 42 is the same as the extension direction of the fixing portion 221 of the grounding terminal 20G.

[0042] In some embodiments, the material of the wave absorbing member 40 may be at least one of manganese zinc ferrite, nickel zinc ferrite, amorphous alloy (such as Fe-Si-B), nanocrystalline (Fe-Cu-Nb-Si-B), and a mixed material of magnetic powder and polymer.

[0043] In some embodiments, the electrical connector 001 includes an insulating body 50, which is provided with a docking groove 51. The contact portions 21 of the two rows of terminals 20, the sideband signal terminals 20B, and the power optimization terminals 20P extend into the docking groove 51. The insulator 10 is fixed in the insulating body 50, and the pin portion 23 of the terminal 20 extends from the bottom of the insulating body 50.

[0044] In some embodiments, the electrical connector 001 includes a metal housing 60 made of a conductive material. This housing not only provides shielding but also provides a locking and anti-mist function during docking. The metal housing 60 has solder pins 61 extending from the sides of the circuit board 002 and is secured to the circuit board 002 by soldering. The insulating body 50 is disposed within the metal housing 60. A slot 62 is provided on the side of the metal housing 60. The insulating body 50 also has an external mounting portion 52 on the side of the insulating body 50, which is secured to the slot 62.

[0045] In addition, those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of disclosure of the present application.

Claims

1. An electrical connector comprising an insulator and at least one row of terminals, each row of terminals comprising a signal terminal pair and two ground terminals located on either side of the signal terminal pair, each signal terminal pair comprising two differential terminals arranged adjacent to each other; each terminal comprising a contact portion and a pin portion located at opposite ends thereof, and an intermediate portion connecting the contact portion and the pin portion; the intermediate portion comprising a fixing portion fixed to the insulator and an elastic arm extending from the fixing portion out of the insulator, the contact portion being formed by further extending from the elastic arm, characterized in that: The contact portions of adjacent terminals have the same spacing, the pin portions of adjacent terminals have the same spacing, the width of the fixed portion of the differential terminal is smaller than the width of the fixed portion of the grounding terminal, and the width of the fixed portion of each differential terminal is smaller than half the width of its corresponding elastic arm.

2. The electrical connector according to claim 1, wherein: Each of the differential terminals has an inner edge adjacent to another differential terminal and an outer edge adjacent to the ground terminal. The differential terminals are provided with a material removal groove at their outer edges, so that the width of the fixed portion of the differential terminal is less than half the width of its corresponding elastic arm.

3. The electrical connector according to claim 2, wherein: The width of the elastic arm of the ground terminal is the same as the width of the corresponding fixing portion.

4. The electrical connector according to claim 2, wherein: The width of the elastic arm of the differential terminal is smaller than the width of the elastic arm of the ground terminal.

5. The electrical connector according to claim 2, wherein: Each of the differential terminals has a first central axis. The contact portion and the pin portion of each of the differential terminals are symmetrical about the first central axis. The inner edge of the middle portion of the differential terminal is farther away from the first central axis than the outer edge thereof.

6. The electrical connector according to claim 5, wherein: Each of the grounding terminals is provided with a second central axis, and the contact portion, the pin portion and the middle portion of each of the grounding terminals are symmetrical about the second central axis.

7. The electrical connector according to claim 5, wherein: The outer edge of the fixing portion of each differential terminal and the outer edge of the elastic arm thereof are located on opposite sides of the first central axis.

8. The electrical connector according to claim 1, wherein: The electrical connector includes a grounding member disposed in the insulator, wherein a plurality of pins are punched out of the grounding member, and the grounding terminals in the same row are correspondingly connected to at least one of the pins.

9. The electrical connector according to claim 1, wherein: The electrical connector includes an absorbing member, which is arranged on the insulator. The absorbing member is separated from the ground terminal or partially contacts the ground terminal.

10. The electrical connector according to claim 9, wherein: The absorbing member includes an absorbing body and a plurality of absorbing strips extending upward from the absorbing body. The absorbing strips and the grounding terminal are arranged correspondingly along a first direction. The extending direction of the absorbing strips is the same as the extending direction of the fixing portion of the grounding terminal.

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