Electrical connector

Abstract

The present application relates to the technical field of electronic devices, and particularly relates to an electric connector, which comprises an insulating body, two rows of terminals and a plurality of outer shielding sheets; the insulating body comprises two side walls and a mating slot; the terminal comprises a main body, an elastic arm and a pin; the terminal comprises a plurality of signal terminal pairs and two ground terminals on both sides of the signal terminal pairs; the outer shielding sheet comprises a horizontal strip, a shielding part extending upward from the horizontal strip and a ground elastic arm on both sides of the shielding part, the horizontal strip spans the main body of the elastic arm of the corresponding signal terminal pair, and the shielding part spans the elastic arm of the corresponding signal terminal pair; the ground terminal is provided with a first ground finger protruding from the elastic arm to the corresponding ground elastic arm, the ground elastic arm is provided with a first lapping part protruding to the first ground finger, and the first lapping part abuts against the first ground finger. The outer shielding sheet can shield the interference of external noise on the signal terminal pair, and is electrically connected with the ground terminal, so that multiple common grounds are achieved, the resonance effect is effectively improved, and the high-frequency high-speed signal transmission performance is improved.

Description

Technical Field

[0001] This invention relates to the field of electronic device technology, and more particularly to an electrical connector. Background Technology

[0002] Electrical connectors consist of signal terminals for transmitting electrical signals and grounding terminals for providing a safe ground. Impedance control of the signal terminals is a critical design element for ensuring signal integrity and reducing reflections and losses. Currently, it is usually necessary to install a dedicated grounding component, such as conductive plastic, internally to bridge the common ground system formed between the grounding terminals. However, the existing connection methods between the grounding component and the grounding terminals are still insufficient in terms of long-term stability, resistance to environmental interference, and reliability of electrical connections, making it difficult to meet the requirements of high-reliability electrical connectors for low impedance, high stability, and long lifespan in common ground systems.

[0003] Therefore, it is necessary to provide an improved electrical connector to address the aforementioned problems. Summary of the Invention

[0004] The technical solution to be solved by the present invention is to provide an electrical connector that can improve the performance of high-frequency and high-speed signal transmission.

[0005] This invention provides a technical solution, which is: an electrical connector, including an insulating body, two rows of terminals, and multiple outer shielding plates; the insulating body includes two opposing sidewalls and a mating groove located between the sidewalls; each terminal includes a main body, elastic arms extending from the main body, and pins, the elastic arms having contact portions protruding into the mating groove; each row of terminals includes multiple signal terminal pairs and two grounding terminals located on both sides of each signal terminal pair, each signal terminal pair including two adjacent signal terminals; each outer shielding plate includes a horizontal strip, and a shielding portion extending upward from the horizontal strip and grounding elastic arms located on both sides of the shielding portion, the horizontal strip spanning the main body of the elastic arm of the corresponding signal terminal pair, the shielding portion spanning the elastic arm of the corresponding signal terminal pair; each grounding terminal has a first grounding finger protruding from its elastic arm toward the corresponding grounding elastic arm, each grounding elastic arm has a first overlapping portion protruding toward the corresponding first grounding finger, the first overlapping portion abutting against the corresponding first grounding finger.

[0006] Compared to existing technologies, the outer shielding sheet of this invention can shield external noise from interfering with the signal terminal pairs. At the same time, the outer shielding sheet is electrically connected to the grounding terminal to achieve multiple common grounds, which can effectively improve the resonance effect and thus provide a good high-frequency and high-speed signal transmission performance. Attached Figure Description

[0007] Figure 1 This is a perspective view of an electrical connector according to an embodiment of the present invention.

[0008] Figure 2 for Figure 1 A three-dimensional view of the electrical connector from another angle.

[0009] Figure 3 for Figure 1 Exploded perspective view of an electrical connector.

[0010] Figure 4 for Figure 1 A sectional view along the XX direction.

[0011] Figure 5 for Figure 1 A 3D view of the electrical connector after the insulation body has been removed.

[0012] Figure 6 for Figure 5 A 3D view of one of the terminal modules.

[0013] Figure 7 for Figure 5 A three-dimensional view of the terminal module from another angle.

[0014] Figure 8 for Figure 7 Exploded view of the terminal module.

[0015] Explanation of key component symbols: 10. Electrical connectors; 1. Insulating body; 11. Side wall; 12. Connecting groove; 13. Terminal receiving groove; 2. Terminal; 20. Terminal module; 21. Main body; 22. Flexible arm; 221. Contact part; 23. Pin; 24. Signal terminal; 25. Grounding terminal; 251. First grounding finger; 252. First protrusion; 253. Second grounding finger; 254. Second protrusion; 26. First shielding plate; 261. Snap finger; 262. Additional shielding part; 27. Second shielding plate; 28. Insulating block; 281. Riveting protrusion; 3. Outer shielding plate; 31. Horizontal strip; 32. Shielding part; 33. Grounding spring arm; 331. First overlapping part; 332. Second overlapping part; 34. Riveting holes; 4. Intermediate shielding plate; 5. Holding components; 51. Crossbeam; 52. Protruding rib; 53. Slot; 54. Grounding slot; 55. Opening. Detailed Implementation

[0016] The technical solutions of the present invention will now be described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] Please refer to Figures 1-8 The present invention provides an electrical connector 10, wherein the grounding terminal 25 therein has high contact reliability with the outer shielding plate 3.

[0018] Please refer to Figures 1-3 The electrical connector 10 includes an insulating body 1, two rows of terminals 2, and multiple outer shielding plates 3. The insulating body 1 has a longitudinal structure, with its length defined as the longitudinal direction. It has two opposing sidewalls 11 and a mating groove 12 located between the two sidewalls 11. Each sidewall has a row of terminal slots 13, which connect to the mating grooves 12 along the thickness direction of the insulating body 1.

[0019] Please refer to Figure 4 as well as Figures 6-8 Two rows of terminals 2 are arranged opposite to each other within the insulating body 1. Each row of terminals 2 includes multiple signal terminal pairs and two grounding terminals 25 located on both sides of each signal terminal pair. Each signal terminal pair includes two adjacent signal terminals 24. Each signal terminal pair is used to transmit high-speed differential signals, forming a differential signal terminal pair.

[0020] Please refer to Figures 6-8 Each terminal 2 includes a main body 21, an elastic arm 22 extending from the main body 21, and a pin 23. That is, both the signal terminal 24 and the ground terminal 25 include an integrally formed main body 21, elastic arm 22, and pin 23. When the terminal 2 is installed inside the electrical connector 10, the elastic arm 22 of the signal terminal 24 extends upward into the terminal slot, and the elastic arm 22 of the ground terminal 25 extends upward into the terminal slot. Each elastic arm 22 has a contact portion 221 protruding from the terminal slot 13 into the mating slot 12. The contact portion 221 is used for connecting devices such as electronic cards. The pin 23 extends downward to the bottom of the insulating body 1 and bends outward for integral soldering and fixing of the electrical connector 10 to external devices, thus achieving an electrical path.

[0021] Please refer to Figure 3 and Figure 8 Multiple outer shielding plates 3 are arranged in two rows. Each row of outer shielding plates 3 is located outside the corresponding row of terminals 2. Each outer shielding plate 3 includes a horizontal bar portion 31, a shielding portion 32 extending upward from the horizontal bar portion 31, and grounding spring arms 33 located on both sides of the shielding portion 32. The horizontal bar portion 31 spans the main body portion 21 of the corresponding signal terminal pair, and the shielding portion 32 spans the elastic arm 22 of the corresponding signal terminal pair.

[0022] Please refer to Figures 6-8Each grounding terminal 25 is further provided with a first grounding finger 251 protruding from its elastic arm 22 to the corresponding grounding elastic arm 33. Each grounding elastic arm 33 is provided with a first overlapping portion 331 protruding to the corresponding first grounding finger 251. The first overlapping portion 331 abuts against the corresponding first grounding finger 251 to establish a safe and reliable low-impedance electrical path and provide a low-impedance return path for the signal.

[0023] Thus, the outer shielding plate 3 can shield the signal terminal pair from external noise interference. Simultaneously, all outer shielding plates 3 are electrically connected to the grounding terminal 25, achieving multiple common grounds, which effectively improves the resonance effect and provides good high-frequency, high-speed signal transmission performance. The grounding terminal 25 achieves elastic contact with the first overlapping portion 331 of the outer shielding plate 3 through the first grounding finger 251. This elastic contact prevents excessive deformation of the grounding terminal 25 when components such as insert cards are inserted into the electrical connector 10, thus ensuring reliable contact between the grounding terminal 25 and the outer shielding plate 3 and achieving a durable and reliable low-impedance connection.

[0024] For optimization, please refer to... Figures 6-8 The free end of the grounding spring arm 33 is curved towards the corresponding first grounding finger 251 to form a first overlapping portion 331. The free end of the first grounding finger 251 has an upwardly protruding first protrusion 252, which can slide along the first overlapping portion 331. This sliding design between the first protrusion 252 and the first overlapping portion 331 buffers the force of the insertion card, providing reliable sliding contact between the grounding terminal 25 and the outer shielding plate 3. (Optimized version, please refer to...) Figure 7 The free ends of the two grounding terminals 25 are connected together to achieve local common grounding of the two grounding terminals 25.

[0025] For optimization, please refer to... Figure 8 Each grounding terminal 25 is provided with a second grounding finger 253 protruding from its elastic arm 22 toward a corresponding grounding elastic arm 33. Each grounding elastic arm 33 is provided with a second overlapping portion 332 protruding toward the corresponding second grounding finger 253. The second overlapping portion 332 abuts against the corresponding second grounding finger 253. The second grounding finger 253 is located below the first grounding finger 251. The provision of the second grounding finger 253 and the second overlapping portion 332 increases the grounding conduction path between the outer shielding plate 3 and the grounding terminal 25. The double contact method further increases the contact reliability between the outer shielding plate 3 and the grounding terminal 25, realizing a durable and reliable low-impedance connection between the two.

[0026] For optimization, please refer to... Figure 8The second overlapping portion 332 is formed by the V-shaped bend of the grounding spring arm 33. The free end of the second grounding finger 253 is provided with a downwardly protruding second protrusion 254, which can slide along the second overlapping portion 332. Through the sliding design of the second protrusion 254 and the second overlapping portion 332, it can cooperate with the first protrusion 252 and the first overlapping portion 331 to further buffer the force of the insertion card and further increase the sliding contact reliability of the grounding terminal 25 and the outer shielding plate 3.

[0027] Please refer to Figure 7 and Figure 8 In this embodiment, the electrical connector 10 includes a first shielding plate 26 and two second shielding plates 27. The first shielding plate 26 is integrally connected to the main body portion 21 of the two grounding terminals 25. Each second shielding plate 27 is integrally bent out from the main body portion 21 of the corresponding grounding terminal 25, and the horizontal strip portion 31 is pressed parallel to the two second shielding plates 27. The first shielding plate 26 and the second shielding plate 27 cooperate with the main body portion 21 of the grounding terminal 25 to form a cavity, which facilitates the reception of the signal terminal pair, so that the signal terminal pair is located between the two grounding terminals 25. In this way, the interference of internal and external noise on the signal terminal pair can be effectively shielded.

[0028] For optimization, please refer to... Figure 4 and Figure 7 The electrical connector 10 includes an intermediate shielding plate 4, and a first shielding piece 26 is stamped with at least one spring finger 261; the spring finger 261 presses against the intermediate shielding plate 4. The intermediate shielding plate 4 is a long strip structure that spans the main body 21 of a row of terminals 2. In this embodiment, the intermediate shielding plate 4 is formed by welding two long strip-shaped metal plates together. The long strip-shaped intermediate shielding plate 4 can provide metal shielding for the inner side of the terminals 2 and realize grounding conduction for the entire row of terminals 2.

[0029] For optimization, please refer to... Figure 7 The first shielding plate 26 extends downward to form an additional shielding portion 262, which extends to the bottom surface of the insulating body 1. The additional shielding portion 262 can further shield the signal terminal 24 along the vertical direction of the insulating body 1, further blocking crosstalk.

[0030] For optimization, please refer to... Figure 8The main body 21 of a pair of signal terminals is fixed inside an insulating block 28, the elastic arm 22 is located on the upper part of the insulating block 28, and the pin 23 is located on the lower part of the insulating block 28. The main body 21 of the ground terminal 25, together with the first shielding plate 26 and the second shielding plate 27, covers and is fixed to the insulating block 28; the main body 21 of the outer shielding plate 3 is fixed to the outer surface of the insulating block 28, thereby forming a terminal module 20. At this time, the signal terminal pair is located between two ground terminals 25. In each terminal module 20, the ground terminal 25 can provide grounding shielding and a low-impedance return path for the intermediate signal terminal pair.

[0031] For optimization, please refer to... Figure 8 The insulating block 28 is provided with a riveting protrusion 281; the outer shielding plate 3 is provided with a riveting hole 34. The shape of the riveting hole 34 and the riveting protrusion 281 is not limited to circular or polygonal, and can be selected according to actual needs. The outer shielding plate 3 is riveted to the riveting protrusion 281 through the riveting hole 34. The deformation of the riveting fastens the outer shielding plate 3 and the insulating block 28 together, and the outer shielding plate 3 and the insulating block 28 can maintain a stable connection state for a long time, thereby ensuring a stable connection between the outer shielding plate 3 and the grounding terminal 25.

[0032] In this embodiment, please refer to Figure 3 The insulating body 1 includes a retaining member 5 fixed between two side walls 11. The retaining member 5 includes a crossbeam 51 extending along the longitudinal direction and a plurality of protruding ribs 52 extending from the crossbeam 51. A slot 53 is formed between adjacent protruding ribs 52, and the terminal modules 20 are inserted into and fixed in the slots 53 one by one. The retaining member 5 improves the installation stability of the terminal modules 20 within the insulating body 1.

[0033] For optimization, please refer to... Figure 3 The top of the retainer 5 is provided with a grounding groove 54, and the crossbeam 51 is provided with an opening 55 on the wall of the slot 53. The intermediate shielding plate 4 is fixed in the grounding groove 54. The slot is connected to the grounding groove 54 through the opening 55, so that the intermediate shielding plate 4 is exposed in the slot. Then, after the terminal module 20 is installed into the slot 53, the spring finger 261 on the first shielding plate 26 can pass through the opening 55 and abut against the intermediate shielding plate 4.

[0034] In this embodiment, the reference Figure 3As shown, the intermediate shielding plate 4 is first fixed in the retaining member 5 by integral injection molding or installation. The two rows of terminal modules 20 are assembled from both sides of the retaining member 5 and fixed in the slots 53, and then inserted into the insulating body 1 from bottom to top. It can be seen that in this embodiment, the signal terminal 24 is a forming terminal or a molded terminal, that is, the terminal 2 is formed by bending after stamping a metal plate; the grounding terminal 25 is a blanking terminal or a blanking terminal, that is, the terminal 2 is formed by cutting and separating a metal plate. The blanking terminal helps to form an integral part with the first shielding plate 26 and the second shielding plate 27.

[0035] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of the present invention fall within the scope of the present invention.

Claims

1. An electrical connector, characterized in that, It includes an insulating body, two rows of terminals, and multiple outer shielding plates; the insulating body includes two opposing sidewalls and a mating groove located between the sidewalls; The terminal includes a main body, elastic arms extending from the main body, and pins, wherein the elastic arms are provided with contact portions protruding into the mating groove; Each row of terminals includes multiple signal terminal pairs and two ground terminals located on both sides of each signal terminal pair, and each signal terminal pair includes two adjacent signal terminals; Each of the outer shielding plates includes a horizontal bar portion, a shielding portion extending upward from the horizontal bar portion, and grounding spring arms located on both sides of the shielding portion. The horizontal bar portion spans the main body portion of the corresponding signal terminal pair, and the shielding portion spans the spring arms of the corresponding signal terminal pair. Each of the grounding terminals is provided with a first grounding finger protruding from its elastic arm toward a corresponding grounding elastic arm, and each of the grounding elastic arms is provided with a first overlapping portion protruding toward the corresponding first grounding finger, the first overlapping portion abutting against the corresponding first grounding finger.

2. The electrical connector according to claim 1, characterized in that, The free end of the grounding spring arm is curved to form the first overlapping part, and the free end of the first grounding finger is provided with a first protruding point that extends upward, and the first protruding point can slide along the first overlapping part.

3. The electrical connector according to claim 1, characterized in that, The free ends of the two grounding terminals are integrally connected to each other.

4. The electrical connector according to claim 2, characterized in that, Each of the grounding terminals is provided with a second grounding finger protruding from its elastic arm toward a corresponding grounding elastic arm, and each of the grounding elastic arms is provided with a second overlapping portion protruding toward the corresponding second grounding finger, the second overlapping portion abutting against the corresponding second grounding finger; the second grounding finger is located below the first grounding finger.

5. The electrical connector according to claim 4, characterized in that, The second overlapping portion is formed by bending the grounding spring arm in a V-shape, and the free end of the second grounding finger is provided with a downward protruding second protrusion, which can slide along the second overlapping portion.

6. The electrical connector according to claim 1, characterized in that, The electrical connector includes a first shielding plate and two second shielding plates. The first shielding plate is integrally connected to the main body of the two grounding terminals. Each second shielding plate is integrally bent out from the main body of the corresponding grounding terminal. The crossbar is pressed parallel to the two second shielding plates.

7. The electrical connector according to claim 6, characterized in that, The electrical connector includes an intermediate shielding plate, and the first shielding plate is stamped with at least one spring finger; the spring finger presses against the intermediate shielding plate.

8. The electrical connector according to claim 7, characterized in that, The first shielding sheet extends downward to form an additional shielding portion, which extends to the bottom surface of the insulating body.

9. The electrical connector according to claim 6, characterized in that, The main body of each signal terminal pair is fixed inside an insulating block. The main body of the grounding terminal, together with the first shielding plate and the second shielding plate, covers and is fixed to the insulating block. The main body of the outer shielding plate is fixed to the outer surface of the insulating block, thereby forming a terminal module.

10. The electrical connector according to claim 9, characterized in that, The insulating block is provided with a riveting protrusion; the outer shielding plate is provided with a riveting hole, and the outer shielding plate is riveted to the riveting protrusion through the riveting hole.

11. The electrical connector according to claim 10, characterized in that, The insulating body includes a retainer fixed between the two sidewalls. The retainer includes a crossbeam and a plurality of protruding ribs extending from the crossbeam. A slot is formed between adjacent protruding ribs, and the terminal module is inserted into and fixed in the slot.

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