Electric connector

Abstract

The utility model discloses an electric connector, which comprises a terminal assembly and a grounding assembly, the terminal assembly and the grounding assembly are inserted forwards together and fixed in a mounting space of an insulating body, a conductive connecting piece of the grounding assembly is used as a grounding contact part, a pin part is used as a grounding welding part to replace a conventional grounding terminal structure together, and the manufacturing cost is saved; the plastic part of the terminal assembly is provided with a limiting surface for stopping the rear end of the guide connection part from moving backwards so as to counteract the backward friction force applied to the main body part of the shielding part by the inner wall surface of the mounting space in the insertion process, and the problem that the bending part of the shielding part is stressed and deformed downwards to cause the pin part to deflect downwards is prevented; and the coplanarity of the pin part and the signal welding part of the signal terminal is ensured, so that a good welding effect of the electric connector and a circuit board is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electric connector, especially an electric connector for transmitting high-frequency signals.

BACKGROUND

[0002] The existing electric connector for transmitting high-frequency signals is horizontally mounted on a circuit board and comprises an insulating body and a plurality of pairs of differential signal terminals fixed to the insulating body. The rear end of the insulating body is concavely provided with a mounting groove. A shielding member is inserted into the mounting groove along the front-rear direction to shield the plurality of pairs of differential signal terminals. The shielding member comprises a main body portion extending horizontally and an extension portion bent and extending from the main body portion along the up-down direction. The main body portion is inserted into the mounting groove and contacts the top wall of the mounting groove to be positioned. The extension portion extends out of the mounting groove. The main body portion is located above the plurality of pairs of differential signal terminals to shield the plurality of pairs of differential signal terminals. The extension portion is bent and extended rearwardly with a plurality of grounding welding portions located in the same plane as the welding portions of the differential signal terminals to be welded to the circuit board.

[0003] However, during the process of inserting the shielding member into the mounting groove, the upper surface of the main body portion of the shielding member will rub against the top wall of the mounting groove. The main body portion will be subjected to the frictional force of the top wall of the mounting groove transmitted to the bent portion of the shielding sheet, causing the bent portion of the shielding sheet to have a downward deformation trend and to rotate at the same time. The plurality of grounding welding portions are deflected downward, causing the welding surfaces thereof to be lower. The plurality of grounding welding portions cannot be kept in the same plane as the welding portions of the differential signal terminals, affecting the welding effect of the surfaces of the differential signal terminals. During the process of welding the circuit board, the welding surfaces of the grounding welding portions are lower than the welding portions of the differential signal terminals, causing the surfaces of the grounding welding portions to first abut against the circuit board, so that the welding portions of the differential signal terminals cannot fully abut against the circuit board, possibly causing the welding portions of the differential signal terminals to be empty-welded.

[0004] Therefore, it is necessary to design an improved electric connector to solve the above technical problems.

UTILITARY MODEL CONTENTS

[0005] In view of the problems in the background art, the utility model aims to provide an electric connector which saves manufacturing cost by setting a shielding member and a guide member to replace a grounding terminal, and sets a limiting surface of a plastic member to stop the rear end of the guide member from moving rearward, so as to offset the rear frictional force of the inner wall surface of the mounting space to the main body portion of the shielding member during the assembling process, prevent the bent portion of the shielding member from being deformed downwardly and causing the pin portion to be deflected downwardly, and ensure the good welding effect of the signal welding portion and the pin portion to the circuit board.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: an electric connector, characterized by, including: an insulating body, the insulating body has a tongue plate extending forward, and an installation space is set up from the rear end of the insulating body and extends to the tongue plate forward, a terminal assembly is inserted and fixed in the installation space forward, the terminal assembly includes a plastic piece and the signal terminal fixed to the plastic piece, the signal terminal has a signal contact part exposed on the side surface of the tongue plate in the up-down direction, the signal terminal has a signal welding part exposed to the plastic piece, the plastic piece is recessed with installation groove along the up-down direction, the installation groove penetrates the plastic piece to form a through groove backward, and the through groove penetrates the plastic piece along the up-down direction, the plastic piece is provided with a limit surface in front of the installation groove,

[0007] A grounding assembly is installed in the terminal assembly along the up-down direction and is inserted into the installation space together with the terminal assembly, the grounding assembly includes a shielding piece and a lead piece, the shielding piece includes a main body part extending in the front-back direction and an extension part bent from the main body part and extending in the up-down direction, a pin part extends backward from the extension part, the main body part is located on the side of the signal contact part away from the tongue plate, the extension part is inserted into the installation groove along the up-down direction, the pin part protrudes out of the through groove backward, the pin part and the signal welding part are located on the same plane to be welded with a circuit board, the lead piece is fixedly connected to the main body part, in the front-back direction, the limit surface is located between the rear end of the lead piece and the installation groove, in the up-down direction, one side surface of the lead piece is exposed to the tongue plate to form a grounding contact part, the grounding contact part and the signal contact part are arranged in a row along the left-right direction, and the limit surface stops the rear end of the lead piece from moving backward.

[0008] Further, the plastic piece is recessed downward to form a receiving groove, the receiving groove is located in front of the installation groove, the receiving groove penetrates the plastic piece forward to accommodate the lead piece, and a rear wall surface of the receiving groove forms the limit surface.

[0009] Further, the lead piece is welded and fixed to the main body part, the main body part is provided as a non-broken hole structure, the front end of the lead piece does not exceed the front end of the main body part, and the rear end of the lead piece does not exceed the rear end of the main body part.

[0010] Further, the signal terminals have a plurality of signal terminals, the plurality of signal terminals form a plurality of differential signal pairs, the plurality of differential signal pairs are arranged adjacent along the left-right direction, the lead connectors have a plurality of lead connectors, each two adjacent lead connectors and the main body form a shielding area surrounded by three surfaces, two signal contact portions of each differential signal pair are located in a corresponding shielding area, in the up-down direction, the thickness of each lead connector is greater than the thickness of each signal contact portion, and each ground contact portion is flush with each signal contact portion in the up-down direction.

[0011] Further, the pin portions correspond to the lead connectors, the mounting slots pass through the plastic member to form a plurality of through slots corresponding to the plurality of pin portions, and two signal soldering portions of each differential signal pair are located between two pin portions.

[0012] Further, each signal terminal has a horizontal section extending in the front-rear direction and a connecting section extending in the up-down direction and connecting the horizontal section and the signal soldering portion, each horizontal section includes the signal contact portion located at the front section thereof and a first exposed portion located rearward of the signal contact portion, each signal contact portion is exposed to the lower surface of the tongue plate, in the left-right direction, the width of the first exposed portion is less than the width of the signal contact portion, the plastic member has a body portion and a plurality of protruding portions extending forward from the body portion, the connecting section is fixedly arranged on the body portion, the lower surfaces of the first exposed portions of the two signal terminals of each differential signal pair are respectively exposed to the lower sides of the corresponding protruding portions and exposed to the lower surface of the tongue plate, and each protruding portion covers the left and right side surfaces of the first exposed portions of the corresponding two signal terminals and the upper surface of the first exposed portion.

[0013] Further, each horizontal section further includes a second exposed portion connected to the connecting section and a buried portion connecting the first exposed portion and the second exposed portion, each protruding portion has a step portion protruding in the up-down direction, each step portion abuts against the lower wall of the mounting space in the up-down direction, each buried portion is buried in the corresponding step portion, the plastic member is recessed in a plurality of notches in the up-down direction, in the front-rear direction, the notches are located on the side of the step portion away from the tongue plate, and two second exposed portions of each differential signal pair are at least partially exposed to the corresponding notches in the up-down direction.

[0014] Further, the front end of each lead connector protrudes forward beyond the front end of each horizontal section, and the rear end of each lead connector protrudes rearward beyond the rear end of each horizontal section.

[0015] Further, the insulating body has a base, the tongue plate is integrally extended from the base forward to form, the mounting space penetrates the base along the front and back direction, a side surface of the tongue plate penetrates along the up and down direction from the mounting space to form a signal groove and a ground groove, the signal groove and the ground groove have a partition rib between, the signal groove and the ground groove are recessed along the up and down direction, the recessed depth is less than the height of the mounting space at the base, the signal contact is accommodated in the signal groove, and the lead-in piece enters the ground groove.

[0016] Further, the lead-in piece is exposed to the side of the tongue plate and is provided with a first guide surface which is inclined forward, and a side inner wall surface of the mounting space along the up and down direction has a second guide surface, the second guide surface cooperates with the first guide surface to guide the lead-in piece to pass through the mounting space along the front and back direction and enter the tongue plate.

[0017] Compared with the prior art, the utility model has the advantages that: the lead-in piece is fixedly connected to the main body part of the shielding piece, one side surface of the lead-in piece is exposed to the tongue plate to form a ground contact part, the pin part of the shielding piece is located in the same plane as the signal welding part to be surface welded with the circuit board, the lead-in piece and the pin part of the shielding piece replace the conventional ground terminal structure, manufacturing cost is saved, the main body part of the shielding piece shields the signal contact part along the up and down direction, the lead-in piece shields the signal contact part along the left and right directions, the signal contact part is shielded in multiple directions, shielding effect is improved, the extension part of the shielding piece is inserted into the mounting groove of the plastic part along the up and down direction, the rear end of the lead-in piece is stopped by the limiting surface of the plastic part to prevent the lead-in piece from moving backward, the backward frictional force of the side inner wall surface of the mounting space along the up and down direction on the main body part of the shielding piece during the process that the ground assembly is inserted into the mounting space along with the terminal assembly is offset, the bending part of the shielding piece is prevented from being deformed under stress and deflecting downward to drive the pin part to deflect downward, the coplanarity of the pin part and the signal welding part of the signal terminal is ensured, the welding effect of the electric connector and the circuit board is ensured, and the pin part is prevented from being lower than the signal welding part to cause the empty welding phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective assembly view of the electric connector of the utility model;

[0019] Figure 2 It is a perspective assembly view of the electric connector of the utility model;

[0020] Figure 3 It is a perspective assembly view of the electric connector of the utility model; Figure 2 It is a sectional view along A-A direction;

[0021] Figure 4 It is a sectional view along B-B direction; Figure 2A sectional view along the direction of B-B;

[0022] Figure 5 The utility model discloses a Figure 4 The utility model discloses a

[0023] Figure 6 The utility model discloses a

[0024] Figure 7 The utility model discloses a

[0025] Figure 8 The utility model discloses a

[0026] Figure 9 The utility model discloses a

[0027] Figure 10 The utility model discloses a

[0028] Figure 11 The utility model discloses a

[0029] Specific embodiment's figure number explanation:

[0030]

[0031]

Specific embodiment

[0032] In order to better understand the purpose, structure, characteristics and effects of the utility model, the utility model will be further explained in combination with the drawings and specific embodiments.

[0033] As Figures 1 to 11 The utility model discloses an electric connector defines a front and back direction and perpendicular to the front and back direction one left and right direction and one up and down direction. For the understanding of the drawing, the direction of front and back direction is the positive direction of X axis, the direction of left and right direction is the positive direction of Y axis, and the direction of up and down direction is the positive direction of Z axis.

[0034] Please refer to Figure 1 , Figure 2 and Figure 9The utility model discloses an electric connector, which comprises an insulating body 1, a terminal assembly M1 and a grounding assembly G assembled to one end of the insulating body 1, the terminal assembly M1 comprises a plastic part 2 and a plurality of lower-row terminals 4, and the grounding assembly G comprises a shielding part 5 and a plurality of lead-through parts 6.

[0035] As Figure 4 and Figure 9 、 Figure 10 illustrated, the insulating body 1 comprises a base 11 and a tongue plate 12 integrally extended forward from the base 11, an installation space 13 is formed from the rear end of the insulating body 1 and extended forward to the tongue plate 12, in the embodiment, the installation space 13 is located below the accommodating cavity 17 and is arranged at intervals, further, a plurality of signal grooves 14 and grounding grooves 15 are formed by penetrating the lower surface of the tongue plate 12 downward from the installation space 13, each signal groove 14 and each grounding groove 15 respectively extend in the front-rear direction, and the plurality of signal grooves 14 and the plurality of grounding grooves 15 are arranged at intervals in the left-right direction, the left and right sides of each signal groove 14 are respectively provided with one grounding groove 15, and each grounding groove 15 and the adjacent signal groove 14 are provided with a separation rib 18 to separate the signal groove 14 and the grounding groove 15, in the up-down direction, the depth of each signal groove 14 and each grounding groove 15 is less than the height of the installation space 13 at the base 11; in the embodiment, a plurality of other grooves 16 are formed by penetrating the lower surface of the tongue plate 12 downward from the installation space 13, the plurality of other grooves 16 are arranged at intervals in the left-right direction with the plurality of signal grooves 14 and the plurality of grounding grooves 15; the inner wall surface of the lower side of the installation space 13 is provided with a plurality of second guide surfaces 131.

[0036] As Figure 1 、 Figure 4 and Figures 6 to 10As shown, the terminal assembly M1 includes a plastic member 2 and a plurality of lower-row terminals 4 embeddedly fixed to the plastic member 2. The plastic member 2 includes a body portion 21. An installation groove 212 is concavely formed on the upper surface of the body portion 21 downward. The installation groove 212 penetrates the body portion 21 rearward to form a plurality of through grooves 2121. The plurality of through grooves 2121 are arranged in the left-right direction and each penetrates the body portion 21 in the up-down direction. A plurality of receiving grooves 213 are concavely formed on the upper surface of the body portion 21 downward. Each receiving groove 213 penetrates the body portion 21 forward. The plurality of receiving grooves 213 are arranged in the left-right direction. A limiting surface 2131 is formed on the rear wall surface of each receiving groove 213. In the front-rear direction, the plurality of limiting surfaces 2131 are located in front of the installation groove 212. A plurality of notches 211 are concavely formed on the lower surface of the body portion 21 upward. The plurality of notches 211 are arranged in the left-right direction. Each notch 211 is located in front of the installation groove 212 and is arranged in the left-right direction between the plurality of receiving grooves 213. A plurality of protruding portions 22 are protrudingly formed forward from the body portion 21. The plurality of protruding portions 22 are arranged in the left-right direction. In this embodiment, the plurality of notches 211 are arranged in the front-rear direction in alignment with the plurality of protruding portions 22. Further, a step portion 221 is protrudingly formed downward from the rear section of each protruding portion 22 connected to the body portion 21. In this embodiment, the plurality of lower-row terminals 4 include a plurality of signal terminals 41 and a plurality of other terminals 42. The plurality of signal terminals 41 form a plurality of differential signal pairs S. Each differential signal pair S is used to transmit a pair of differential signals. The plurality of differential signal pairs S are arranged in the left-right direction in adjacency. In other embodiments, the plurality of lower-row terminals 4 can all be signal terminals 41. Figure 7 and Figure 10As shown, in the left-right direction, the width of the first exposed part 4112 is less than the width of the signal contact part 4111, the lower surface of the first exposed part 4112 of each signal terminal 41 of the differential signal pair S is exposed to the lower side of the corresponding protruding part 22 and exposed to the lower surface of the tongue plate 12, and each protruding part 22 covers the left and right side surfaces and the upper surface of the corresponding two first exposed parts 4112 of the differential signal pair S; the two second exposed parts 4114 of each differential signal pair S are at least partially exposed to the corresponding notch 211 in the up-down direction.

[0037] Referring to Figure 1 and Figures 5 to 7 , the grounding assembly G includes a shielding member 5 and a plurality of lead members 6 fixedly connected to the shielding member 5, the shielding member 5 includes a main body part 51 extending in the horizontal direction and an extension part 52 bent downward from the main body part 51; in this embodiment, a plurality of pin parts 53 extend rearward and are connected to the extension part 52 as grounding welding parts to be welded to the circuit board to ensure grounding effect; in other embodiments, the pin part 53 can also be provided as one. The lead member 6 is a metal material that can conduct electricity, and the plurality of lead members 6 are arranged at intervals in the left-right direction and are fixedly connected to the lower surface of the main body part 51, respectively, and the lower surface of each lead member 6 is inclined forward to form a first guide surface 61, in this embodiment, the plurality of lead members 6 are respectively welded and fixed to the lower surface of the main body part 51, and the plurality of lead members 6 are stably and seamlessly connected and fixed to the main body part 51 by welding, and the main body part 51 is provided as a non-hole structure to improve the shielding effect of the main body part 51, and each adjacent two lead members 6 and the main body part 51 form a shielding area P with three sides surrounded, and the lower end of each shielding area P is in an open shape; in other embodiments, the lead member 6 can also be fixedly connected to the main body part 51 by a buckle or other means. Further, as shown in Figure 8 , the front end of the lead member 6 does not exceed the front end of the main body part 51, preventing the growth of the conductive branch due to the forward extension of the lead member 6 out of the main body part 51, thereby causing a wooden pile effect and improving the high-frequency transmission performance of the electrical connector, and the rear end of the lead member 6 does not exceed the rear end of the main body part 51, preventing the rear end of the lead member 6 from abutting against the extension part 52 and causing the extension part 52 to deform under stress, thereby ensuring the structural stability of the shielding member 5.

[0038] As Figures 6 to 8As shown, the grounding component G is first installed to the terminal component M1 in the vertical direction. The extension 52 of the shield 5 is inserted downward into the mounting groove 212. The multiple through grooves 2121 respectively make way for the multiple pins 53, so that the multiple pins 53 pass downward through the multiple through grooves 2121 and extend backward out of the corresponding through grooves 2121. In the vertical direction, the multiple pins 53 and the multiple signal soldering parts 413 are located on the same plane for soldering to the circuit board. That is, the side surface of the multiple pins 53 used for soldering to the circuit board and the side surface of the multiple signal soldering parts 413 used for soldering to the circuit board are located on the same plane, so that the multiple pins 53 and the multiple signal soldering parts 413 can be soldered well to the circuit board. Furthermore, in the horizontal direction, the two signal soldering parts 413 of each differential signal pair S are located between the two pins 53, and the two adjacent signal soldering parts 413 are shielded in the horizontal direction by the pins 53 on both sides. The rear sections of the multiple guide members 6 are respectively inserted downward into the multiple receiving slots 213. The multiple limiting surfaces 2131 are respectively located between the rear ends of the multiple guide members 6 and the mounting slots 212 to prevent the multiple guide members 6 from moving backward. The front sections of the multiple guide members 6 extend forward out of the body part 21. The body part 51 is located above the multiple signal contact parts 4111 to shield the multiple signal contact parts 4111 in the vertical direction.

[0039] like Figure 4 and Figure 5 As shown, during the process of the grounding assembly G being inserted forward and fixed to the mounting space 13 of the insulating body 1 along with the terminal assembly M1, when the upper surface of the main body 51 abuts against the lower inner wall of the mounting space 13 and generates friction, the lower inner wall of the mounting space 13 applies a rearward frictional force to the upper surface of the main body 51. Since multiple conductive parts 6 are welded and fixed to the main body 51, the rearward frictional force on the main body 51 is transmitted to the multiple conductive parts 6 fixedly connected to it. Therefore, the main body 51 is subjected to force and has a tendency to move backward, which in turn causes the multiple conductive parts 6 welded and fixed to it to have a tendency to move backward. At this time, the multiple limiting surfaces 2131 respectively Each of the multiple guide pieces 6 is correspondingly blocked from moving backward. Similarly, the forward resisting force on the multiple guide pieces 6 is also transmitted to the main body 51 fixedly connected to them. The forward blocking force provided by the multiple limiting surfaces 2131 to the multiple guide pieces 6 counteracts the backward frictional force applied to the main body 51 by the inner wall of the mounting space 13, so as to prevent the bending part of the shielding piece 5 from being deformed by force and deflected downward, causing the pin part 53 to deflect downward, ensuring the coplanarity of the pin part 53 and the signal soldering part 413, thereby ensuring a good soldering effect between the electrical connector and the circuit board, and also avoiding the phenomenon of open soldering caused by the pin part 53 being lower than the signal soldering part 413. Figure 9 , Figure 10As shown, the main body 21 is housed within the mounting space 13 of the base 11. The signal contacts 4111 of the plurality of signal terminals 41 pass through the mounting space 13 and are respectively housed within the plurality of signal grooves 14. The plurality of signal contacts 4111 are exposed on the lower surface of the tongue plate 12 to mate with the mating connector. The lower surfaces of the plurality of first exposed portions 4112 are also exposed on the lower side of the tongue plate 12. Because the width of the signal contacts 4111 in the left-right direction is greater than the width of the first exposed portions 4112 in the left-right direction, the inductance of the signal contacts 4111 is smaller. Therefore, the inductance of the signal contacts 4111 is... The impedance is relatively low, and the lower surface of the first exposed portion 4112 is exposed to the air. Due to the low dielectric constant of air, the capacitance of the first exposed portion 4112 decreases, and the impedance increases. Therefore, by covering the left and right sides and the upper surface of the first exposed portion 4112 with the protrusion 22, it can not only support and stabilize the first exposed portion 4112, but also increase the capacitance of the first exposed portion 4112 through the plastic material with a high dielectric constant, thereby reducing the impedance of the first exposed portion 4112. This is beneficial for impedance matching between the signal contact portion 4111 and the first exposed portion 4112, and improves the high-frequency transmission performance of the electrical connector. The lower surface of the stepped portion 221 abuts against the lower inner wall of the mounting space 13 in the vertical direction to facilitate the fixing of the terminal assembly M1. By embedding the embedded portion 4113 in the stepped portion 221, the lower surface of the embedded portion 4113 is prevented from being exposed outside the plastic part 2, which would cause the embedded portion 4113 to be scratched and worn by the inner wall of the mounting space 13 during assembly. Since the area surrounding the embedded portion 4113 is made of plastic material with a high dielectric constant, the capacitance is large, resulting in a low impedance. By exposing the second exposed portion 4114 in the vertical direction through the notch 211, the second exposed portion 4114 is exposed to the air with a low dielectric constant, reducing the capacitance and increasing the impedance of the second exposed portion 4114. This allows the impedance of the horizontal segment 411 to match, which is beneficial for improving the high-frequency transmission performance of the electrical connector. Furthermore, the first guide surfaces 61 of the plurality of conductors 6 and the plurality of second guide surfaces 131 of the mounting space 13 are inclined in the same direction. The plurality of first guide surfaces 61 and the plurality of second guide surfaces 131 are matched one-to-one to guide the plurality of conductors 6 through the mounting space 13 in the front-to-back direction and into the plurality of grounding grooves 15 respectively, avoiding wear on the front end of the conductors 6. The lower surfaces of the plurality of conductors 6 are exposed on the lower surface of the tongue plate 12 to form a grounding contact portion. The signal groove 14 and the grounding groove 15 are separated by the separating rib 18, thereby achieving the effect of separating the shielded signal terminal 41 and the conductors 6. Furthermore, such as Figure 3As shown, two signal contact portions 4111 of each differential signal pair S are respectively accommodated in the corresponding shielding area P, that is, each differential signal pair S is provided with a conducting piece 6 on the side away from each other, the lower end of each shielding area P is in an open shape so as to facilitate the corresponding two signal contact portions 4111 to be respectively connected with the corresponding mating terminal, and in the up-down direction, the thickness of each conducting piece 6 is greater than the thickness of each signal contact portion 4111, and each grounding contact portion is flush with each signal contact portion 4111 in the up-down direction, the conventional grounding terminal structure is replaced by the plurality of conducting pieces 6 and the shielding piece 5, thereby saving the manufacturing cost; further, as shown Figure 8 As shown, the front end of each conducting piece 6 protrudes forward beyond the front end of each horizontal section 411, and the rear end of each conducting piece 6 protrudes backward beyond the rear end of each horizontal section 411, so as to completely shield the horizontal section 411 of the signal terminal 41 in the left-right direction, and the main body 51 shields the horizontal section 411 of the plurality of signal terminals 41 in the up-down direction, the plurality of shielding areas P formed by the main body 51 and the plurality of conducting pieces 6 shield the horizontal section 411 of the plurality of differential signal pairs S from three sides respectively, and the conducting piece 6 is welded and fixed with the main body 51, which is seamless connection to prevent noise leakage, thereby improving the shielding effect of the electrical connector. The upper row module M2 is inserted into the accommodating cavity 17, the insulating piece 7 is buckled and fixed with the insulating body 1 so as to fix the upper row module M2 in the accommodating cavity 17, and the upper surface of the upper row terminal 8 is exposed on the upper side of the tongue plate 12 to be connected with the corresponding mating terminal.

[0040] In summary, the electrical connector has the following beneficial effects:

[0041] (1) The side surface of the lead-through 6 is exposed to the tongue plate 12 to form a grounding contact portion by fixing the lead-through 6 to the main body portion 51 of the shield 5, the pin portion 53 of the shield 5 is located in the same plane as the signal soldering portion 413 as a grounding soldering portion to perform surface soldering with the circuit board, the lead-through 6 and the pin portion 53 replace the conventional grounding terminal structure, the manufacturing cost is saved, and the signal contact portion 4111 is shielded in the up-down direction by the main body portion 51 of the shield 5 and in the left-right direction by the lead-through 6 to shield the signal contact portion 4111 in multiple directions, thereby improving the shielding effect; the extension portion 52 of the shield 5 is inserted into the mounting groove 212 of the plastic part 2 in the up-down direction, the rear end of the lead-through 6 is stopped by the limiting surface 2131 of the plastic part 2 to prevent the lead-through 6 from being displaced rearward, and the forward stopping force provided by the multiple limiting surfaces 2131 to the multiple lead-throughs 6 counteracts the rearward friction force applied by the inner wall surface of the mounting space 13 to the main body portion 51 to prevent the bending portion of the shield 5 from being deformed by stress and deflected downward to drive the pin portion 53 to deflect downward, thereby ensuring the coplanarity of the pin portion 53 and the signal soldering portion 413 and further ensuring the good soldering effect of the electrical connector and the circuit board, and also avoiding the air welding phenomenon caused by the pin portion 53 being lower than the signal soldering portion 413.

[0042] (2) The welding and fixing of the lead-through 6 to the main body portion 51 stably and seamlessly connects the multiple lead-throughs 6 to the main body portion 51, prevents noise leakage, and the main body portion 51 is provided as a non-broken hole structure to improve the shielding effect of the electrical connector; the front end of the lead-through 6 does not exceed the front end of the main body portion 51 to prevent the lead-through 6 from extending forward out of the main body portion 51 to increase the conductive branch and cause the pile effect, thereby improving the high-frequency transmission performance of the electrical connector, and the rear end of the lead-through 6 does not exceed the rear end of the main body portion 51 to prevent the rear end of the lead-through 6 from abutting against the extension portion 52 to cause the extension portion 52 to be deformed by stress, thereby ensuring the structural stability of the shield 5.

[0043] (3) The thickness of each lead-through 6 is greater than the thickness of each signal contact portion 4111, and each grounding contact portion is flush with each signal contact portion 4111 in the up-down direction, the multiple lead-throughs 6 and the shield 5 together replace the conventional grounding terminal structure, the front end of each lead-through 6 exceeds the front end of each horizontal section 411, and the rear end of each lead-through 6 exceeds the rear end of each horizontal section 411 to completely shield the horizontal section 411 of the signal terminal 41 in the left-right direction, and the main body portion 51 shields the horizontal sections 411 of the multiple signal terminals 41 in the up-down direction, thereby forming multiple shielding zones P by the main body portion 51 and the multiple lead-throughs 6 to shield the horizontal sections 411 of each differential signal pair S from three sides, thereby improving the shielding effect of the electrical connector.

[0044] (4) Since the width of the signal contact portion 4111 in the left-right direction is greater than the width of the first exposed portion 4112 in the left-right direction, the inductance of the signal contact portion 4111 is small, and thus the impedance of the signal contact portion 4111 is small, and the lower surface of the first exposed portion 4112 is exposed to air, and since the dielectric constant of air is small, the capacitance of the first exposed portion 4112 is reduced, and the impedance is increased, and thus the left and right side surfaces and the upper surface of the first exposed portion 4112 are covered by the protruding portion 22, which not only supports and stabilizes the first exposed portion 4112, but also increases the capacitance of the first exposed portion 4112 by the plastic material with a large dielectric constant, so as to reduce the impedance of the first exposed portion 4112, which is beneficial to the impedance matching of the signal contact portion 4111 and the first exposed portion 4112, and improves the high-frequency transmission performance of the electrical connector.

[0045] (5) The lower surface of the stepped portion 221 abuts against the lower inner wall surface of the mounting space 13 in the up-down direction to facilitate the fixation of the terminal assembly M1, and the embedding portion 4113 is embedded in the stepped portion 221, so as to prevent the lower surface of the embedding portion 4113 from being exposed outside the plastic part 2 and being scratched and worn by the inner wall surface of the mounting space 13 during assembly. Since the surrounding of the embedding portion 4113 is the plastic material with a large dielectric constant, the capacitance is large, and thus the impedance is small, and the second exposed portion 4114 is exposed to air with a small dielectric constant by being exposed to the notch 211 in the up-down direction, so as to reduce the capacitance and increase the impedance of the second exposed portion 4114, so as to match the impedance of the horizontal section 411, which is beneficial to improve the high-frequency transmission performance of the electrical connector.

[0046] (6) The first guide surfaces 61 of the plurality of lead-through members 6 correspond to the plurality of second guide surfaces 131 of the mounting space 13 one by one, so as to guide the plurality of lead-through members 6 to pass through the mounting space 13 in the front-back direction and enter the plurality of grounding grooves 15 one by one, so as to avoid the front end of the lead-through member 6 from being worn.

[0047] The above detailed description is only for the preferred embodiments of the present application, and does not limit the patent scope of the present application, so that any equivalent technical changes made according to the content of the present application are included in the patent scope of the present application.

Claims

1. An electrical connector characterized by , comprising: an insulating body having a tongue plate extending forwardly, a mounting space being formed in the insulating body and extending forwardly to the tongue plate; a terminal assembly being inserted into the mounting space forwardly, the terminal assembly comprising a plastic member and signal terminals fixed to the plastic member, the signal terminals having signal contact portions exposed to one side surface of the tongue plate in the up-down direction, the signal terminals having signal soldering portions exposed to the plastic member, the plastic member being concave in the up-down direction and having mounting grooves, the mounting grooves penetrating the plastic member rearwardly to form through grooves, and the through grooves penetrating the plastic member in the up-down direction, the plastic member being provided with limit surfaces in front of the mounting grooves; a grounding assembly being mounted to the terminal assembly in the up-down direction and being inserted into the mounting space together with the terminal assembly, the grounding assembly comprising a shielding member and a lead-through member, the shielding member comprising a main body portion extending in the front-rear direction and an extension portion being bent from the main body portion and extending in the up-down direction, a pin portion extending rearwardly from the extension portion, the main body portion being located on a side of the signal contact portions away from the tongue plate, the extension portion being inserted into the mounting grooves in the up-down direction, the pin portion extending out of the through grooves rearwardly, the pin portion and the signal soldering portions being located in the same plane for soldering to a circuit board, the lead-through member being fixedly connected to the main body portion, in the front-rear direction, the limit surfaces being located between the rear end of the lead-through member and the mounting grooves, in the up-down direction, one side surface of the lead-through member being exposed to the tongue plate to form a grounding contact portion, the grounding contact portion and the signal contact portions being arranged in a row in the left-right direction, the limit surfaces stopping the rear end of the lead-through member from moving rearwardly.

2. The electrical connector of claim 1, wherein: The plastic member is concave downwardly to form receiving grooves in front of the mounting grooves, the receiving grooves penetrating the plastic member forwardly to receive the lead-through member, rear wall surfaces of the receiving grooves forming the limit surfaces.

3. The electrical connector of claim 1, wherein: The lead-through member is soldered and fixed to the main body portion, the main body portion being provided as a non-broken hole structure, the front end of the lead-through member not exceeding the front end of the main body portion, the rear end of the lead-through member not exceeding the rear end of the main body portion.

4. The electrical connector of claim 1, wherein: The signal terminals are provided in plurality, the plurality of signal terminals forming a plurality of differential signal pairs, the plurality of differential signal pairs being provided adjacently in the left-right direction, the lead-through members being provided in plurality, each two adjacent lead-through members and the main body portion forming a shielding area surrounded by three surfaces, the two signal contact portions of each differential signal pair being located in a corresponding shielding area, in the up-down direction, the thickness of each lead-through member being greater than the thickness of each signal contact portion, each grounding contact portion being flush with each signal contact portion in the up-down direction.

5. The electrical connector of claim 4, wherein: The pin portions are provided in plurality corresponding to the lead-through members, the mounting grooves penetrating the plastic member rearwardly to form a plurality of through grooves corresponding to the plurality of pin portions, the two signal soldering portions of each differential signal pair being located between two pin portions.

6. The electrical connector of claim 4, wherein: Each of the signal terminals has a horizontal section extending in the front-rear direction and a connecting section extending in the up-down direction and connecting the horizontal section and the signal soldering part, each of the horizontal sections includes the signal contact part located at the front section thereof and a first exposed part located rearward of the signal contact part, each of the signal contact parts is exposed to the lower surface of the tongue plate, in the left-right direction, the width of the first exposed part is smaller than the width of the signal contact part, the plastic member has a body part and a plurality of protruding parts extending forward from the body part, the connecting section is fixed to the body part, the lower surfaces of the first exposed parts of the two signal terminals of each of the differential signal pairs are respectively exposed to the lower sides of the corresponding protruding parts and are exposed to the lower surface of the tongue plate, each of the protruding parts covers the left and right side surfaces of the first exposed parts of the corresponding two signal terminals and the upper surface of the first exposed part.

7. The electrical connector of claim 6, wherein: Each of the horizontal sections further includes a second exposed part connected to the connecting section and a buried part connecting the first exposed part and the second exposed part, each of the protruding parts has a stepped part protruding in the up-down direction, each of the stepped parts abuts against the lower wall of the mounting space in the up-down direction, each of the buried parts is buried in the corresponding stepped part, the plastic member is recessed in the up-down direction, in the front-rear direction, the recesses are located on the side of the stepped parts away from the tongue plate, the two second exposed parts of each of the differential signal pairs are at least partially exposed to the corresponding recesses in the up-down direction.

8. The electrical connector of claim 7, wherein: The front end of each of the lead-through members protrudes forward beyond the front end of each of the horizontal sections, the rear end of each of the lead-through members protrudes rearward beyond the rear end of each of the horizontal sections.

9. The electrical connector of claim 1, wherein: The insulating body has a base part, the tongue plate is integrally extended forward from the base part, the mounting space penetrates through the base part in the front-rear direction, a side surface of the tongue plate penetrates through the mounting space in the up-down direction to form a signal recess and a ground recess, the signal recess and the ground recess have a partition rib therebetween, the recessing depth of the signal recess and the ground recess in the up-down direction is smaller than the height of the mounting space at the base part, the signal contact part is accommodated in the signal recess, the lead-through member enters the ground recess.

10. The electrical connector of claim 1, wherein: The lead-through member exposed to the side of the tongue plate is forwardly inclined and has a first guide surface, the inner wall of the mounting space in the up-down direction has a second guide surface, the second guide surface cooperates with the first guide surface to guide the lead-through member to pass through the mounting space into the tongue plate in the front-rear direction.

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