TWI578649B - Plug connector - Google Patents

Description

Plug connector

The invention relates to a plug connector.

On August 11, 2014, the USB Association announced a new type of electrical connector with a plug connector that can be inserted into the corresponding socket connector in both directions. The socket connector can transmit USB 2.0 and USB 3.1 signals. This connector is named USB Type C connector. According to the news reported by the industry, the electrical connector has great potential for development, and each connector manufacturer cooperates with the system manufacturer to actively develop it. The USB Type C plug connector connected to the cable has a full-pin structure for transmitting USB 3.0 or 3.1, and a missing pin structure for transmitting USB 2.0. The missing stitch structure is to draw four pairs of differential pair terminals in the full-pin structure. With or without settings, USB 2.0 Type C plug connectors generally retain 12 or 11 terminals. The number of terminals is large and needs to be transferred to the cable through the sub-board, which is relatively high cost.

In view of this, it is indeed necessary to provide a lower cost plug connector to overcome the deficiencies of the prior art.

The object of the present invention is to provide a plug connector in which the connection between the plug connector and the cable is simple and the cost is low.

The plug connector of the present invention can be implemented by the following technical solutions: a plug connector including an insulative housing, a first row of terminals, a second row of terminals, and a metal latching member; the insulative housing is provided with a forwardly extending mating cavity The docking chamber has opposite inner wall surfaces; the first row of terminals and the second row of terminals are respectively disposed on opposite inner wall surfaces of the mating cavity and protrude into the mating cavity; the metal latching member includes a lock extending into the opposite sides of the mating cavity The first row of terminals includes a plurality of first contact arms extending into the docking cavity and a plurality of first pins extending out of the insulative housing; the second row of terminals includes a plurality of second contact arms extending into the docking cavity and Extending a plurality of second pins of the insulative housing; the plurality of first contact arms include a pair of USB2.0 terminal contact arms, a pair of power terminal contact arms, a pair of ground terminal contact arms, and a detecting terminal contact arm The first plurality of pins includes a pair of USB2.0 terminal pins, a power terminal pin, a ground terminal pin and a detection terminal pin; the plurality of second contact arms include a pair of power terminals The contact arm and a pair of ground terminal contact arms, said pin comprising a plurality of second power supply terminal and a pin ground terminal pin.

The plug connector of the present invention can be implemented by the following technical solutions: a plug connector including an insulative housing, a first row of terminals, a second row of terminals, and a metal latching member; the insulative housing is provided with a forwardly extending mating cavity The docking chamber has opposite inner wall surfaces; the first row of terminals and the second row of terminals are respectively disposed on opposite inner wall surfaces of the mating cavity and protrude into the mating cavity; the metal latching member includes a lock extending into the opposite sides of the mating cavity a plurality of power terminals and a pair of ground terminals, wherein each pair of power terminals includes two independent contact arms extending into the docking cavity and a pin that is simplified into one, each pair of ground terminals The two contact arms extending independently of the docking cavity and the pins that are simplified into one, the power terminals of the first and second rows of terminals are electrically connected to each other, and the grounding terminals and the locks of the first and second rows of terminals The fasteners are electrically connected to each other.

Compared to the prior art, the terminal pin of the present invention is simplified with respect to the contact arm, thereby simplifying the connection with the cable.

The first figure is a perspective view of the plug connector of the present invention;

The second drawing is a partially exploded perspective view of the first figure;

The third figure is a perspective view of the plug connector and the cable connection in the second figure, wherein the metal shell and the insulating shell are removed;

The fourth figure is a perspective view of the third figure facing down;

The fifth figure is similar to the fourth figure, showing a perspective view of the second tail connecting resistor;

The sixth figure is similar to the fourth figure, showing a perspective view of another case of the second tail connection resistance;

The seventh figure is a perspective view of a partial exploded view of the plug connector;

The eighth figure is a perspective view of another angle of the seventh figure;

Figure 9 is a cross-sectional view of the seventh figure taken along the dotted line IX-IX;

The tenth figure is a sectional view of the seventh figure along the dotted line X-X;

The eleventh figure is a sectional view of the seventh figure along the dotted line XI-XI;

Figure 12 is a perspective view of the insulating body further exploded in the eighth figure;

The thirteenth figure is a perspective view of the terminal module further exploded in the twelfth figure;

Figure 14 is a perspective view of another angle of the thirteenth figure;

The fifteenth figure is a perspective view of the terminal and the locking member;

Figure 16 is a perspective view of another angle of the fifteenth figure; and

Figure 17 is a plan view of the sixteenth figure.

The invention discloses a USB Type C plug connector. Referring to the first and second figures, a specific embodiment of the present invention is a USB 2.0 Type C plug connector 1000 having a plug connector 100 at the front end and a cable 102 at the rear end. The outer side of the joint of the connector 100 and the cable 102 is covered with a metal outer casing 103, and the outer side of the metal outer casing is injection molded with an insulating outer casing 104.

Referring to the seventh to eleventh drawings, the plug connector 100 includes an insulative housing 20, a first row of terminals 30, a second row of terminals 40, a metal latching member 50, and a metal housing 60. Referring to the ninth to eleventh drawings, the insulative housing 20 is provided with a forwardly extending docking cavity 21, the docking cavity has an opposite inner wall surface 211, and the first row of terminals 30 and the second row of terminals 40 are respectively disposed in pairs. The opposite inner wall surface of the cavity protrudes into the mating cavity, wherein the first row of terminals 30 includes a plurality of first contact arms 31 extending into the docking cavity 21, and the second row of terminals 40 includes a plurality of second contact arms 41 extending into the docking cavity . The metal locking member 50 includes a locking arm 51 extending into two sides of the mating cavity and a tail portion 52 extending out of the insulating body, the locking arm having a locking head 511. The first row of terminals 30 includes a grounding terminal, a power terminal, a detecting terminal and a USB 2.0 terminal, and the second row of terminals 40 includes a grounding terminal, a power terminal and an additional detecting terminal. In the present invention, in order to simplify the plug connector 100 and the cable The connection of 102, the tail of the terminal is simplified, so the definition of the above terminal is mainly from the contact arm for contacting the terminal of the docking socket connector. Each of the pair of USB 2.0 terminals has a complete contact arm and a pin/tail for transmitting data signals; and the power terminal and the ground terminal have complete contact arms for docking the socket connector, and more The tails are spliced or electrically connected to each other and simplified into a pin to simplify the connection with the cable 102. The specific structure will be described later.

Referring to the fourteenth and fifteenth drawings, the first row of terminals 30 includes a plurality of first contact arms 31 and a plurality of first tail portions 32, and the second row of terminals 40 includes a plurality of second contact arms 41 and a plurality of Second tail 42. The plurality of first contact arms 31 include a pair of USB2.0 terminal contact arms 31D, a pair of power terminal contact arms 31P, a pair of ground terminal contact arms 31G and a detection terminal contact arm 31C, and the plurality of first tail portions 32 include a pair of USB2 .0 terminal tail 32D, a power terminal tail 32P, a ground terminal tail 32G and a detection terminal tail 32C. The detecting terminal contact arm 31C is located on the side of the pair of USB 2.0 terminal contact arms 31D, the pair of ground terminal contact arms 31G are located at the outermost sides, and the pair of power terminal contact arms 31P are located inside the ground terminal contact arms 31G, respectively. It can be seen that each of the grounding terminals integrally has a contact arm and a tail portion, and the pair of power terminals are connected together by a connecting portion 33P at the rear end thereof, and the one power terminal tail portion 32P is extended by the side of the connecting portion 33P. come out.

The plurality of second contact arms 41 include a pair of power terminal contact arms 41P and a pair of ground terminal contact arms 41G. The plurality of second tail portions 42 include a power terminal tail portion 42P and a pair of ground terminal tail portions 42G. The second contact arm 41 may further include An additional detection terminal 41C, in this embodiment, the additional detection terminal 41C has only a contact arm, so the additional detection terminal is only an empty needle, has no function, and can be omitted; in other embodiments, There is an additional detection terminal that can extend out of the tail.

The pin 52 of the locking member 50 is located at the outermost side of the plurality of first tail portions 32. The locking arm of the locking member is used for fastening with the shielding plate in the tongue connector of the socket connector, and the shielding plate is connected to the grounding path. Therefore, the pair of tail portions 52 of the locking member are ultimately connected to the ground path. Referring to FIGS. 14 to 16 , a pair of USB 2.0 terminal tail portions 32D, a power terminal tail portion 32P, and a pin 52 (T) of the lock member in the first tail portion 32 are arranged in the first plane ( That is, the upper plane). The detecting terminal tail portion 32C in the first tail portion is bent to be adjacent to the plurality of second tail portions 42, such that the detecting terminal tail portion 32C in the first tail portion, one of the second tail portions, the ground terminal tail portion 42G (T), and a power source The terminal 42P is located in the second plane (ie, the lower plane), and the other ground terminal tails 32G, 42G and the pin 52 of the locking member 50 are located between the first and second planes. It can be seen that the grounding terminal and the locking member related to the grounding are kept as far as possible, which can improve the electrical performance. Of course, if it is satisfied, the tail can be directly overlapped at the front end without the tail. The ground terminal tail portion 32G in the first tail portion is located inside the lock member tail portion 52 and the ground terminal tail portion 32G is arranged side by side contact with the tail portion 52, and the ground terminal tail portion of the second tail portion is offset sideways to be in stack contact with the tail portion 52. arrangement. In other words, the power terminal tails of the first row of terminals are electrically connected to each other by a connecting portion, and the power terminal tail portions of the second terminals are also electrically connected to each other by a connecting portion; the first row of terminals and the second row of terminals are The ground terminal tails abut each other to form an electrical connection. As shown in the seventh to eighth embodiments, the insulative housing is provided with a support plate 22 at a rear end surface thereof. The support plate has an opposite first surface 221 and a second surface 222. The tail portion in the first plane is exposed on the support. The first surface 221 of the plate 22, the tail portion in the second plane is exposed on the second surface 222 of the support plate, and the tail portions exposed on the surface of the support plate constitute the pins of the connection cable 102, such that the first pin includes A pair of USB2.0 terminal pins (ie, tail 32D), one power terminal pin (ie, tail 32P), one pin of the locking member (ie, the tail 52 (T)) and one detecting terminal pin (ie, the tail) 32C). The second pin includes a ground terminal pin (ie, tail 42G (T)) and a power terminal pin (ie, tail 42P). The other ground terminal tail portions 32G, 42G and the tail portion 52 of the lock member 50 are embedded in the support plate 22. It can be understood that any of the tail of the grounding terminal and the tail of the locking member can serve as a grounding terminal pin, and is not limited to the grounding terminal pin in the tail of the locking member of the present embodiment. These bare pins are used to connect to the core of the cable. In a preferred embodiment, a pair of USB 2.0 terminal pins, a power terminal pin, and a ground terminal pin of the first row of terminals are exposed on the first surface of the support plate; One of the detecting terminal pin and the second row of terminals and one of the grounding terminal pins are arranged on the second surface of the supporting plate. Of course, it is not limited to this arrangement. The first and second surfaces 221 and 222 are further provided with a plurality of grooves extending through the support plate 22 for receiving the core wire of the cable and the resistor pins, and restricting the movement of the core wire before welding. Easy to solder. The pins and the lower bottom surface of the groove are in the same plane with each other, and the pins do not penetrate the support plate 22 backward.

Referring to the third to fourth figures, the cable 102 includes five core wires, one of which is a power cable 102P, two USB 2.0 wires 102D, one ground wire 102G is arranged in a first row, and two USB 2.0 wires are in the middle. Position; one of the detection lines 102C is arranged in the second row. The first row of core wires are soldered to the pins of the first surface of the support plate, and the second row of detection wires 102C are soldered to the detecting terminal pins 32C of the second surface of the support plate. This case is applicable to USB Type C to USB. In the case of Type C transmission, the power supply terminal pin 42P and the ground terminal pin 42G on the side are not connected to the component and are vacant. In order to ensure that the power terminal pin/ground terminal pin are well connected to each other, the support plate 22 is provided with two filling slits 23 on the side of the bare pins, and the solder is poured through the slit to ensure the tail of the terminal. Contact each other. The fifth figure shows another cable usage. When the cable is used for data signal transmission from USB Type A or USB Type B to USB Type C, the resistance pin is shorted to detect the terminal pin and the ground terminal pin. The power terminal pin 42P is vacant and is filled with solder. The sixth figure shows another cable usage. When the cable is used to transfer data signals from USB Type C to USB Type A or USB Type B, the resistance component is shorted to detect the terminal pin and the power terminal. The foot, the ground terminal pin 42G is vacant and is filled with solder. Of course, if the plug connector only needs to transmit power, then a pair of USB2.0 terminals can be removed, that is, each row of terminals includes a pair of power terminals and a pair of ground terminals, and each pair of power terminals includes independent extensions into the docking chamber. The two contact arms and the pins that are simplified into one, each of the pair of ground terminals includes two separate contact arms extending into the mating cavity and a pin that is simplified into one, and the power terminals in the first and second rows of terminals Electrically connected to each other, the grounding terminal and the locking member of the first and second rows of terminals are electrically connected to each other.

Referring to the fifteenth to sixteenth drawings, the first contact arm 31 further includes a first additional ground terminal contact arm 311, and the first additional ground terminal contact arm 311 is a ground ring for the rear end of the socket connector tongue. contact. In the existing design, an additional elastic grounding plate is generally disposed at the front end of the receiving cavity to achieve the shielding effect with the grounding ring, but the additional elastic grounding plate has a complicated structure, and the plug connector with a small size is The provision of an additional resilient ground plate results in a thinner insulating body 20 and a weaker strength. In the embodiment, the first row of terminals 31 are respectively disposed with a first additional grounding terminal contact arm 311 adjacent to the grounding terminal contact arm 31G, and the first additional grounding terminal contact arm 311 is integrated with the lateral grounding terminal contact arm 31G. Connected; in the front-rear direction, the first additional ground terminal contact arm 311 protrudes forwardly from the ground terminal contact arm, as shown in FIG. 17; in the direction perpendicular to the docking cavity, the first additional The grounding terminal contact arm 311 is farther from the mating cavity 21 than the grounding terminal contact arm 31, as shown in FIG. The first row of terminals 30 of the present invention is formed by stamping the same strip, all the terminals are connected together by a bridge in the middle, and then the bridge is cut off, leaving a cutting surface 34, the front end of the contact arm from the bridge Formed to extend forward, the first tail and the first contact arm are connected by a joint or separately or to each other. The first additional ground terminal contact arm 311 and the ground terminal contact arm 31G are both formed to extend forward and are joined together at the cutting face of the tape. The second row of terminals 40 is also provided with a second additional ground terminal contact arm that is substantially identical and aligned with the first additional ground terminal contact structure of the first row of terminals. In the front-rear direction, the second additional ground terminal contact arm 411 protrudes forwardly from the ground terminal contact arm, and in the direction perpendicular to the docking cavity, the second additional ground terminal contact arm is farther away from the ground terminal contact arm The cavity 21 is connected.

The following describes the specific assembly structure of the plug connector 100. Referring to the twelfth to fourteenth drawings, the plug connector 100 includes an insulating front frame 12, a first terminal module 13 and a second terminal module 14, the insulative housing 20 and the first 1. The second row of terminals is formed by the insulative front frame 12, the first terminal module 13 and the second terminal module 14 being assembled together. The insulating front frame 12 defines opposite front end faces 121 and rear end faces and opposite outer wall faces 122. The insulating front frame 12 is provided with the above-mentioned docking cavity 21 and a flat plate 123 extending from the rear end face and parallel to the docking cavity. The insulating front frame is provided with a terminal groove 124 extending forward to communicate with the mating cavity 21. The first terminal module 13 includes a first insulator 131 and the first row of terminals 30 fixed to the first insulator. The first insulator includes a first base portion 1311 and a first tongue portion 1312 extending forward from the first base portion. The row of terminals includes the plurality of first contact arms 31 extending out of the first tongue. The second terminal module 14 includes a second insulator 141 and the second row of terminals 40 fixed to the second insulator. The second insulator 141 includes a second base portion 1411 and a second tongue portion 1412 extending forward from the second base portion. The second row of terminals includes a plurality of second contact arms 41 that extend out of the second tongue 1412. In a preferred embodiment, the first and second rows of terminals 30, 40 are embedded in the first and second insulators by injection molding. During the forming, the material bridge can provide positioning of the mold after molding. The bridge is cut through the through holes of the first and second tongues. Referring to FIG. 11 , the metal locking member 50 includes a pair of locking arms 51 extending forward into the docking chamber and a beam 53 connecting the locking arms, and the beam is provided with a latching head 55 protruding forward. The flat plate 123 is provided with a pair of latching arms 125 having a latching function extending rearward. The latching head 55 cooperates with the pair of latching arms 125 to fix each other. Referring to the ninth figure, the flat plate 123 is clamped at Between the first and second tongue portions 1312, 1412, the plurality of first and second contact arms 31, 42 extend through the terminal slot 124 into the docking cavity 21.

Referring to the thirteenth to fourteenth drawings, the first and second terminal modules 13 and 14 define faces facing each other as inward faces 135 and 145, and the inward faces 135 of the first terminal module are disposed. The slot 133 is provided with two positioning posts 134 extending toward the second terminal module at the first tongue. The latching member 50 is first placed on the inward facing surface 135, and the tail portion 52 is initially fixed in the receiving slot. The beam 53 abuts against the positioning post 134, and the latching head 55 is located between the two positioning posts and protrudes forward, and the latching arm 51 extends forward. Then, the second terminal module 14 is assembled with the first terminal module through the positioning hole 144 and the positioning post 134 to form a component; of course, the locking component can also be initially fixed on the inner surface of the second terminal module. . Then, the above components are inserted into the insulating front frame 12 from the back to the front. Side slots 126 are disposed on both sides of the insulating front frame. The side slots simultaneously extend rearward through the side surface of the flat plate 123. The terminal slots 124 extend rearward through the rear end surface of the insulating front frame, and the first and second terminal modules are inserted into the insulation from the back to the front. The contact arms 31 and 41 of the terminal protrude through the terminal slot 124 and protrude into the receiving cavity. The latching arm protrudes into the receiving cavity through the side slot 126, and the latching head 55 opens the pair of latching arms 125. They are fixed to each other by their elastic recovery. Of course, the structure also facilitates the disassembly of the components from the insulated front frame. In the ninth diagram, the terminal groove 124 has an insulating sheet 128 at its front end portion, and the front ends of the first and second contact arms 31, 41 are located inside the insulating sheet, so that the butt plug connector is pressed outwardly when inserted. In the second contact arm, the first and second contact arms do not press against the outer metal casing 60 due to the presence of the insulating sheet. The first and second additional grounding terminal contact arms may not be provided with insulating sheets instead of the terminal slots, as shown in the tenth figure. Then, the metal casing 60 is tightly wrapped around the insulating front frame and the outer sides of the first and second tongue portions.

Referring to the thirteenth to fourteenth drawings, it can be seen that the tails of the first and second rows of terminals that need to overlap each other are exposed on the inward faces 135, 145, and the two terminal modules are in contact with each other after assembly. The above-described solder poured from the filling slit 23 can ensure that the tail portions are connected to each other. The detecting terminal tail portion 32C of the first terminal module 13 is exposed on a protruding plane 137, and the second terminal module 14 is provided with a recessed portion 147 that cooperates with the protruding plane. Thus, the rear end of the detecting terminal is assembled. The 32C is directly located on the second surface of the support plate, and the rear ends of the first and second terminal modules are combined to form the support plate of the above-mentioned insulating body.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art will be able to make equivalent modifications or variations in accordance with the spirit of the present invention. It should be covered by the following patent application.

Plug connector: 1000

Plug connector: 100

Insulation front frame: 12

Front end face: 121

Outer wall: 122

Tablet: 123

Terminal slot: 124

Buckle arm: 125

Side slot: 126

Insulation sheet: 128

First terminal module: 13

First insulator: 131

First base: 1311

First tongue: 1312

Socket: 133

Positioning column: 134

Inward facing: 135

Projection plane: 137

Second terminal module: 14

Second insulator: 141

Second base: 1411

Second tongue: 1412

Positioning hole: 144

Inward: 145

Depression: 147

Cable: 102

Power cord: 102P

USB2.0 line: 102D

Ground wire: 102G

Detection line: 102C

Metal case: 103

Insulated housing: 104

Resistance element: 105

Insulation body: 20

Docking chamber: 21

Inner wall: 211

Support plate: 22

First surface: 221

Second surface: 222

Grouting: 23

First row of terminals: 30

First contact arm: 31

USB2.0 terminal contact arm: 31D

Power terminal contact arm: 31P

Ground terminal contact arm: 31G

Detection terminal contact arm: 31C

First additional ground terminal contact arm: 311

First tail: 32

USB2.0 terminal tail: 32D

Power terminal tail: 32P

Ground terminal tail: 32G

Detection terminal tail: 32C

Connection: 33P

Cutting surface: 34

Second row of terminals: 40

Second contact arm: 41

Power terminal contact arm: 41P

Ground terminal contact arm: 41G

Additional detection terminal: 41C

Second additional ground terminal contact arm: 411

Second tail: 42

Power terminal tail: 42P

Ground terminal tail: 42G

Locking parts: 50

Lock arm: 51

Lock head: 511

Tail: 52

Beam: 53

Buckle head: 55

Metal case: 60

Ground terminal tail: 42G (T)

Tail: 52(T)

no

Detection terminal tail: 32C

Power terminal tail: 32P

Second contact arm: 41

Additional detection terminal: 41C

Second additional ground terminal contact arm: 411

Second tail: 42

Ground terminal tail: 42G (T)

Power terminal tail: 42P

Tail: 52(T)

Ground terminal tail: 42G

Claims (10)

a plug connector comprising an insulative housing, a first row of terminals, a second row of terminals and a metal latching member; the insulative housing is provided with a forwardly extending abutting cavity, the docking cavity having an opposite inner wall surface; the first row The terminal and the second row of terminals are respectively disposed on opposite inner wall surfaces of the mating cavity and protrude into the docking cavity; the metal latching member includes a latching arm extending into two sides of the mating cavity; wherein the first row of terminals includes an extension a plurality of first contact arms of the docking cavity and a plurality of first pins extending out of the insulative housing; the second row of terminals includes a plurality of second contact arms extending into the docking cavity and a plurality of second pins extending from the insulative housing; The plurality of first contact arms include a pair of USB2.0 terminal contact arms, a pair of power terminal contact arms, a pair of ground terminal contact arms, and a detection terminal contact arm, the plurality of first pins including a pair of USB 2.0 a terminal pin, a power terminal pin, a ground terminal pin and a detecting terminal pin; the plurality of second contact arms include a pair of power terminal contact arms and a pair of ground terminal contact arms, the plurality Two pin comprises a power terminal and a ground terminal pin pin. The plug connector of claim 1, wherein the plug connector comprises a cable having a core wire, the core wires are connected to the plurality of first pins in a one-to-one correspondence; and the plurality of second pins are Connect surface-welded resistors or cables according to functional requirements. The plug connector of claim 1 or 2, wherein the latching member comprises a tail portion extending from the insulative housing, the tail portions of the latching member abutting the grounding terminal in the first row of terminals Pin. The plug connector of claim 1, wherein the insulative housing is provided with a support plate at a rear end surface thereof, the support plate having opposite first and second surfaces; and a pair of the first row of terminals a USB2.0 terminal pin, a power terminal pin, a ground terminal pin exposed on the first surface of the support plate; a detection terminal pin in the first row terminal and a power terminal of the second row terminal The pin and a ground terminal pin are arranged on the second surface of the support plate. The plug connector of claim 1, wherein the first contact arm further comprises a first additional ground terminal contact arm, the first additional ground terminal contact arm from a ground terminal of the first row of terminals The side of the contact arm extends integrally, and the first additional grounding terminal contact arm protrudes forwardly from the grounding terminal contact arm in the front-rear direction, and the first additional grounding terminal contact arm is grounded in a direction perpendicular to the mating cavity. The terminal contact arm is away from the docking cavity; the second row of contact arms further includes a second additional grounding terminal contact arm extending integrally from the side of the grounding terminal contact arm of the second row of terminals; in the front-rear direction, the first The second additional ground terminal contact arm protrudes forwardly from the ground terminal contact arm; the second additional ground terminal contact arm is away from the mating cavity than the ground terminal contact arm in a direction perpendicular to the mating cavity. The plug connector of claim 3, wherein the pair of power terminal contact arms are connected to a corresponding one of the power terminal pins by a connecting portion; and the rear ends of each of the ground terminal contact arms extend correspondingly a grounding terminal tail portion, the tail portion of the grounding terminal and the tail portion of the locking member abut each other, a tail portion of the locking member forms a grounding terminal pin in the first row of terminals, and one of the grounding terminal tails forms the second row of terminals The ground terminal pin in the middle. The plug connector of claim 1, wherein the insulative housing comprises an insulated front frame, a first terminal module and a second terminal module; the insulating front frame defines opposite front and rear end faces And the opposite outer wall surfaces, the insulating front frame is provided with the abutting cavity and a flat plate extending from the rear end surface and parallel to the docking cavity, and the insulating front frame is provided with a terminal slot extending forwardly to communicate with the docking cavity; The first terminal module includes a first insulator and the first row of terminals fixed to the first insulator, the first insulator includes a first base and a first tongue extending forward from the first base, the plurality of first contact arms extending a second tongue module; the second terminal module includes a second insulator and the second row of terminals fixed to the second insulator, the second insulator includes a second base and a second tongue extending forward from the second base The plurality of second contact arms extend out of the second tongue; the plate is clamped between the first and second tongues, and the first and second contact arms extend through the terminal slot into the docking cavity . The plug connector of claim 7, wherein the plug connector comprises a latching member, the latching member comprising a pair of latching arms extending forwardly into the docking chamber and a beam connecting the latching arms The cross member is provided with a latching head protruding forward; the flat plate is provided with a pair of latching arms having a latching function extending backward; the latching head cooperates with the pair of latching arms to fix each other. The plug connector of claim 7, wherein the terminal slot extends rearward through a rear end surface of the insulating front frame, and the first and second terminal modules are inserted into the insulating front frame from the rear to the front; the terminal slot An insulating sheet is left at a front end portion thereof, and a front end of the first and second contact arms is located inside the insulating sheet; the plug connector includes a metal case, the metal case is tightly wrapped around the insulating front frame and the first The outside of the second tongue. a plug connector comprising an insulative housing, a first row of terminals and a second row of terminals; the insulative housing is provided with a forwardly extending abutting cavity and a rearwardly extending support plate, the docking cavity having opposite inner wall faces; The row of terminals and the second row of terminals are respectively disposed on opposite inner wall surfaces of the mating cavity and protrude into the mating cavity; the metal latching member includes a latching arm extending into two sides of the mating cavity; wherein each of the rows of terminals includes a pair a power terminal and a pair of ground terminals, wherein each pair of power terminals includes two mutually independent contact arms extending into the docking cavity and a pin that is simplified into one, the pair of ground terminals including two independent of each other extending into the docking cavity a contact arm and a pin that is simplified into one, the power terminals of the first and second rows of terminals are electrically connected to each other, the first row of terminals further includes a detecting terminal, and the detecting terminal includes a contact arm and A pin, the grounding terminal and the pin of the power terminal and the pin of the detecting terminal are respectively exposed on opposite sides of the supporting plate for cable or resistance connection.