TWM517440U - Plug connector - Google Patents

Description

Plug connector

This creation relates to a plug connector that can be inserted into a corresponding receptacle connector in both forward and reverse directions.

U.S. Patent Application Publication No. 20130095702A1 discloses a two-way plug connector having a plug connector having opposing upper and lower surfaces, the plurality of conductive terminals being disposed on the upper and lower surfaces. The conductive terminals exposed to the upper and lower surfaces are symmetrically spaced apart from each other, and the shape of the plug connector is substantially 180 degrees symmetric so that it can be inserted into the corresponding receptacle connector in the forward and reverse directions.

However, the socket connector or the inside of the electronic device needs to be provided with a switching circuit to detect whether the plug connector is inserted in the forward direction or reversely inserted, thereby starting the corresponding subsequent procedure. The more the terminals of the connector, the more complicated the switching circuit, and thus, the trend is not met. At the same time, the plug connector is an exposed plug, and there is still the possibility of plugging damage in actual use.

A new type of plug connector has emerged. The plug connector can be inserted into the socket connector in both forward and reverse directions. At the same time, the two connectors can transmit high frequency signals. In the continuous development process, people have developed a way to prevent Plug connectors and receptacle connectors for electromagnetic signal interference and radio frequency interference. However, in actual use, the plug and socket connectors described above are expensive to manufacture and cannot satisfy the use of some low-end products. Therefore, people hope to develop a plug and socket connector that is low cost and can satisfy a single function.

The goal of this creation is to provide a plug connector that is inexpensive to manufacture and can meet certain single functions.

In order to solve the above technical problem, the present invention provides a plug connector including An insulating body, a metal casing covering the outer surface of the insulating body, and two rows of terminals, wherein the insulating body is provided with a receiving cavity penetrating forwardly, the receiving cavity has two opposite sidewalls, and the two rows of terminals comprise respectively A contact portion and a pin disposed on the two opposite side walls and extending into the receiving cavity, the receiving cavity being symmetrically disposed at 180 degrees to allow the plug connector to be inserted into the corresponding socket connector in both forward and reverse directions. Each side wall of the receiving cavity is configured to be provided with twelve terminals, and the two rows of terminals include a first row of terminals and a second row of terminals. The first row of terminals includes a pair of grounding terminals, a pair of power terminals, and a control terminal, wherein the contact portion of the control terminal is located between the contact portions of the pair of power terminals, and the contact portions of the pair of ground terminals are respectively located Two sides of the contact portion of the pair of power terminals; wherein the second row of terminals includes a pair of power terminals and a pair of ground terminals aligned with the corresponding power terminal and the ground terminal of the first row of terminals; the first row of terminals and The second row of terminals are not provided with a differential pair terminal and a differential pair terminal.

In order to solve the above technical problem, the present invention provides a plug connector including An insulating body, a metal casing covering the outer surface of the insulating body, and two rows of terminals, wherein the insulating body is provided with a receiving cavity penetrating forwardly, the receiving cavity has two opposite sidewalls, and the two rows of terminals comprise respectively A contact portion and a pin disposed on the two opposite side walls and extending into the receiving cavity, the receiving cavity being symmetrically disposed at 180 degrees to allow the plug connector to be inserted into the corresponding socket connector in both forward and reverse directions. Each side wall of the receiving cavity is configured to be provided with twelve terminals, and the two rows of terminals include a first row of terminals and a second row of terminals; the first and second rows of terminals do not include a higher transmission speed The data terminals; the pins of the first and second rows of terminals are offset relative to the corresponding contact portions to facilitate soldering.

Compared with the prior art, this creation has the following effects: the original plug connector is low in manufacturing cost, and can satisfy the power transmission function.

200, 300, 510, 500a‧‧‧ plug connectors

202, 320, 512‧‧‧Insulated body

204, 220, 322, 514‧‧‧ metal casing

206‧‧‧ base

208‧‧‧ Body Department

210‧‧‧Flanking

212, 224‧‧‧through holes

214, 516‧‧‧ containment chamber

216, 310, 520‧‧‧ terminals

218, 328, 550‧‧‧ elastic plates

221, 330‧‧‧Insulation

222‧‧‧Metal flank

225‧‧‧Installation Department

235‧‧‧ boards

236‧‧‧First rotating component

238‧‧‧Second rotating element

240‧‧‧Flexible components

242‧‧‧Locking parts

244‧‧‧Socket connector

310G‧‧‧ Grounding terminal

310C‧‧‧Control terminal

310P‧‧‧Power terminal

310V‧‧‧Special Terminal

310D+, 310D-, 520D‧‧‧ signal terminals

312, 524, 524G, 524C, 524V, 524P, 564‧‧‧ feet

314‧‧‧Intermediate offset

316, 522, 522G, 522C, 522P, 522V‧‧‧ contact

318‧‧‧ barbed

321‧‧‧ terminal slot

326, 560‧‧‧Locks

340‧‧‧First terminal module

342‧‧‧Second terminal module

350‧‧‧First insulator

360‧‧‧second insulator

513‧‧‧ side wall

5141‧‧‧After fixation

530‧‧‧ Positioning parts

531‧‧‧Support board

532‧‧‧ surface

533‧‧‧ transverse ribs

540‧‧‧ Cable

542‧‧‧Power cord

544‧‧‧Grounding core

545‧‧‧core

546‧‧‧Control core

552‧‧‧Contact arm

562‧‧‧Lock head

581, 582‧‧‧ metal casing

5811‧‧‧Pre-fixed department

5812, 5822‧‧‧ fixing plate

5821‧‧‧ Groove

588‧‧‧Injected shell

589‧‧‧outer molded case

590‧‧‧Internal circuit board

591‧‧‧ Front line film

592, 592D, 592C, 592G, 592P‧‧‧ after line film

1 is a perspective view of a plug connector of a first embodiment of the present invention, wherein the plug connector has been removed from the injection molded case and the metal case; the second view is a perspective view of the first view at another angle; the third figure is the first view a partially exploded perspective view; a fourth view is a perspective view further exploded in the third figure; and a fifth view is a further exploded perspective view of the fourth figure; The sixth figure is a perspective view of the plug connector after the upper half is removed to clearly show the positional relationship between the terminal and the receiving cavity; the seventh figure is a perspective view of the two rows of terminals in the plug connector; the eighth figure is the seventh figure and the other 11 is a perspective view showing a partial exploded view of a plug connector according to a second embodiment of the present invention; a tenth view is a perspective view of a further exploded view of the ninth embodiment; and an eleventh view is a perspective view of another angle of the tenth figure; Figure 12 is a perspective view further exploded of the eleventh drawing; the thirteenth drawing is an exploded perspective view of the plug connector of the third embodiment of the present invention; and the fourteenth drawing is the upper and lower terminal modules of the thirteenth drawing Fig. 14 is a perspective view further exploded of Fig. 14; Fig. 16 is a perspective view of a plug connector of a fourth embodiment of the present invention; and Fig. 17 is an exploded perspective view of Fig. 16; Figure 8 is a perspective exploded view of another angle of the seventeenth figure; the nineteenth figure is a further exploded perspective view of the seventeenth figure; the twentieth figure is a sectional view of the sixteenth figure along the dotted line XX-XX; and the twentieth Figure 16 is a plug connector Use state corresponding receptacle connector.

The first to eighth figures show the plug connector 510 of the first embodiment, and a cable 540 is connected to the rear end of the plug connector 510. The plug connector 510 of the embodiment is provided with only a few terminals, and is mainly used for Power transmission is provided, ie the size of the connector itself is constant relative to a standard connector but the number of terminals is reduced. The plug connector 510 includes an insulative housing 512, a metal housing 514 enclosing the outer surface of the insulative housing 512, and two rows of terminals 520. The insulative housing 512 is provided with a receiving cavity 516 extending forwardly. The degrees are symmetrically arranged to allow the plug connector 510 to be inserted into the corresponding receptacle connector in both forward and reverse directions. The receiving cavity 516 has two opposite sidewalls 513. Each of the sidewalls 513 is configured to be provided with twelve terminals, that is, a standard connector. However, the present invention is arranged in the two rows of terminals 520 of the two sidewalls 513. Does not conform to the standard connector structure. The first and second rows of terminals 520 are composed of a power terminal, a ground terminal, and a control terminal (Configuration Channel terminal for controlling signal switching)/special terminal, and at the same time, The second row of terminals 520 are arranged diagonally symmetrically with respect to the receiving cavity 516, thus allowing the plug connector 510 to be inserted into the corresponding receptacle connector in both forward and reverse directions. The two rows of terminals 520 include contact portions 522 and pins 524 respectively disposed on the two opposite sidewalls 513 and extending into the receiving cavity 516. The contact portion 522 of the first row of terminals includes a contact portion 522G of a pair of ground terminals, a contact portion 522P of a pair of power terminals, and a contact portion 522C of a control terminal, and the contact portion 522C of the control terminal is located between the pair of power terminals, The contact portions 522P of the power terminals are respectively located on both sides of the contact portion 522C of the control terminal, and the contact portions 522G of the pair of ground terminals are respectively disposed on both sides of the contact portion 522P of the pair of power terminals, and are arranged in a GPCPG. The second row of terminals includes a pair of power terminals and a pair of ground terminals aligned with the corresponding power terminal and the ground terminal of the first row of terminals, and the contact portion 522 of the second row of terminals includes a contact portion 522G of the pair of ground terminals, The contact portion 522P of the power terminal and the contact portion 522V of a special terminal, the contact portion 522V of the special terminal is located at the middle, and the contact portions 522P of the pair of power terminals are respectively located at both sides of the contact portion 522V of the special terminal, the pair of ground terminals The contact portions 522G are respectively disposed on both sides of the contact portion 522P of the pair of power terminals, and are arranged in a GPVPG. The special terminals transmit a certain fixed value of current, and may not be set when the power terminals meet the requirements. In actual use, special The terminals may be connected, but no wires are connected. The contact portions 522P of the power terminals of the first and second rows of terminals (ie, the upper and lower rows of terminals) are aligned one by one in the vertical direction, and the power terminals of the contact portions 522P are aligned with each other to form a power terminal group, first, The contact portions 522G of the ground terminals of the second row of terminals 520 are aligned one by one in the vertical direction, and the ground terminals of the contact portions 522G are aligned with each other to constitute the ground terminal group, but the contact of the control terminals in the first and second rows of terminals 520 The contact portion 522V of the portion 522C and the special terminal is offset from each other by a certain distance and arranged diagonally symmetrically. For the pin 524, the pins 524P of each power terminal group are closely arranged side by side with each other, and the pins 524G of each ground terminal group are closely arranged side by side with each other, and the pin 524C of the control terminal is closely arranged. Then located in the middle and spaced apart from the pin 524G of the ground terminal group and the pin 524P of the power terminal group, the pins 524P, 524V, and 524G in the first row are arranged in PP-V-GG; The pins 524G, 524C, and 524P are arranged in GG-C-PP; on the same side (such as the left side shown in the seventh figure), the first row is the pin 524G of the two ground terminals, and the second row is two. The pin 524P of the power terminal; likewise, the other side is oppositely set. The arrangement of the above-mentioned terminal pins is achieved in the following manner. In the first and second rows of terminals 520, the contact portions 522G of the two ground terminals are vertically aligned with each other, and the pins 524G of one of the ground terminals are directed to the other. Grounding terminal pin 524G Bending, so that the pins 524G of the ground terminals of the two rows of terminals are closely arranged and in contact with each other side by side; the other ground terminals and the power terminals of the first and second rows of terminals 520 are bent so as to form the above-mentioned tight shoulders Arrange and touch each other. The pin 524C of the control terminal and the pin 524V of the special terminal are arranged in two rows. The center line of the terminal contact portion 522 is not in line with the center line of the pin 524. Thus, it is possible for the pins 524 to be bent side by side and arranged side by side. Obviously, the plug connector of this embodiment is not provided with a data terminal with a lower transmission speed (generally referred to as a USB 2.0 terminal) and a data terminal with a higher transmission speed (refers to a data terminal with a transmission speed greater than 1 G, generally referring to The USB 3.0 terminal, that is, the differential pair terminal and the differential pair terminal are received, that is, the terminal where the side wall 513 is vacant is not provided with a terminal, and the data terminal having the high transmission speed is a differential pair terminal and a differential pair terminal. In summary, the terminals aligned one by one in the first and second rows of terminals 520 form two sets of grounding terminal groups and two sets of power terminal groups, and the two pins 524G of each group of grounding terminal groups are horizontally aligned side by side, each group The two pins 524P of the power terminal set are horizontally aligned side by side. The pins 524G, 524P of the adjacent terminal groups are alternately arranged in the first row and the second row.

An elastic plate 550 is disposed on both sides of the insulating body 512, and the elastic plate 550 is clamped Between the outer wall surface of the insulative housing 512 and the metal housing 514, the resilient plate 550 is provided with a contact arm 552 that extends into the receiving cavity 516 for docking with a corresponding receptacle connector. An H-shaped metal locking member 560 is mounted in the insulative housing 512. The locking member 560 has a pair of locking heads 562 and pins 564 extending laterally into the receiving cavity 516. The locking heads 562 are self-locking members 560. The front extension is used to lock the corresponding socket connector, and the pin 564 extends rearward from the locking fastener 560.

An insulating positioning member 530 is disposed at the rear of the insulating body 512, and is provided with a rearward The support plate 531 extends, and the support plate 531 has opposite surfaces 532. After the terminal 520 is mounted into the insulative housing 512, the positioning member 530 is inserted and fixed to the rear end of the insulative housing 512. The terminal pins 524P, 524G, 524C, and 524V are placed on the surface 532 of the support plate 531 through the positioning member 530. The pin 564 of the locking member 560 also passes through the pin hole of the positioning member 530. The two latching heads 562 are located on the same plane, and the pins 564 are offset from each other by a certain distance in the vertical direction for being respectively mounted on the front and back surfaces 532 of the positioning member 530.

A cable 540 is disposed at the rear of the positioning member 530, and includes four power core wires 542, two grounding cores 544 and a control core 546, wherein the four power cores 542 are connected to the pins 524P of the two pairs of power terminals of the first and second rows of terminals 520, one by one. The grounding core 544 is connected to the pins 524G of a pair of grounding terminals arranged side by side, and the control core 546 is connected to the pins 524C of the control terminals. Briefly, each surface 532 of the positioning member 530 has five pins 524. In the lateral direction, the five pins 524 include a pair of pins 524G arranged side by side and a pair of pins 524P arranged side by side. One pin 524C; corresponding cable 540, two power core wires 542 are soldered to a pair of pins 524P, one ground core wire 544 is soldered to a pair of pins 524G, one control core wire 546 is soldered to one pin 524C, and of course the other surface is connected. The foot 524V is idle. By the offset of the pin 524 of the partial terminal in the vertical direction, the connection with the core wire in the corresponding cable 540 becomes very simple, and the power core wire 542, the ground core wire 544, and the core wire of the same type in the control core wire 546 are adjacent to each other. Increase the distance between the core wires of different categories.

It is clear that the terminal of the embodiment only includes the power terminal, the ground terminal and the control The terminal, the internal circuit board is also omitted, and the insulating positioning member 530 directly supports the pin 524 of the terminal to be directly welded to the core wires 542, 544, 546 of the cable 540, and the positioning member 530 also functions as a cable manager.

The ninth to twelfth drawings show the plug connector 500a of the second embodiment, the plug The connector 500a is substantially the same as the structure of the first embodiment, mainly differing in details, and the same reference numerals are used for the same structures. In the embodiment, the terminal 520 mainly includes a power terminal, a ground terminal, a control terminal, and a signal terminal mounted on the insulative housing 512, and has no data terminal with a high transmission speed (where the data terminal refers to a terminal for transmitting data). Compared with the first embodiment, the second row of terminals is further provided with a pair of data terminals 520D (i.e., USB 2.0 terminals) having a lower transmission rate between the power supply terminals and the special terminals. An internal circuit board 590 is horizontally located behind the positioning member 530, and includes a plurality of front line electrodes 591 at the front end and a plurality of rear line electrodes 592 at the rear end. The front line electrode 591 is soldered to the terminals 524 of the terminal. The line piece 592 is soldered to the core wire 545 of the cable; the rear line piece 592 is a simplified electrical piece that is electrically connected to the front line piece 591 for simplifying the connection with the cable. The feature of this embodiment is that the power supply for the internal circuit board 590 is simplified as a power supply line chip 592P, and the grounding power chip is also simplified into a grounded line circuit chip 592G. The two power chips 592G, 592P The first surface of the internal circuit board 590 is disposed. The pair of terminals transmitting the low speed signal still correspond to a pair of signal line circuit pieces 592D, and one control terminal still corresponds to one control line circuit piece 592C, and all are disposed on the second surface of the inner circuit board 590. On the other hand, the front line chip 591 is still associated with the corresponding power supply and The ground terminal 520 is aligned in the front-rear direction without offset. It can be understood that the rear line films 592P and 592G for transmitting power and ground in this embodiment are located on the same side of the internal circuit board 590, and the rear line chips 592D and 592C of the low speed signal and the control signal are located on the other side of the internal circuit board 590. .

The metal housing 514 surrounds the insulative housing 512, a pair of metal housings 581, 582 Then, they are fixed to each other, and the insulating body 512, the metal casing 514 and the cable which are assembled together are clamped and fixed together to form a sub-combination, and then the inner molding shell 588 is surrounded by the sub-combination, and the outer molding shell 589 is enclosed. The housing 588 is molded while the front-end interface and the rear-end cable are exposed. In the present embodiment, the positioning member 530 further includes a lateral rib 533 that is received in the recess 5821 of the metal casing 581, 582. The metal housing 514 is provided with a rear fixing portion 5141, and one of the metal housings 581, 582 is provided with a front fixing portion 5811 which is tightly surrounded by lateral end walls of the rear fixing portion 5141 and fixed to each other by welding. The metal casings 581 and 582 are provided with a pair of fixing plates 5812 and 5822, and the fixing plates 5812 and 5822 are welded to the upper and lower side walls of the rear fixing portion 5141.

The thirteenth to fifteenth drawings show the plug connector 300 of the third embodiment. with Similar to the second embodiment, the plug connector 300 of the present embodiment also includes only the terminal 310 for transmitting the low-speed signal, the grounding, and the power. The internal circuit board is omitted, and the core of the cable is directly connected to the pin of the terminal 310 for saving. cost. The plug connector 300 includes an insulative housing 320 and a metal housing 322 surrounding the insulative housing 320. The metal latching member 326 is assembled in the insulative housing 320. The pair of latching heads of the latching member 326 extend into the front end surface of the insulative housing 320. A pair of elastic plates 328 are mounted on the outer side of the insulative housing 320, and include elastic contact arms extending into the receiving cavity. A pair of insulating sheets 330 are disposed outside the elastic plate 328 for the elastic plate 328 and the metal casing 322. Isolated from each other. Different from the second embodiment, the first terminal module 340 includes a first insulator 350 and five first terminals 310 molded on the first insulator 350. The second terminal module 342 includes a second insulator 360 and is injection molded. The seven second terminals 310 of the two insulators 360. The general standard connector has twelve terminals per row. In this embodiment, a large number of terminals are omitted on the basis of the standard connector, and only the above five and seven terminals are reserved. The first row of terminals includes a pair of ground terminals 310G, a pair of power terminals 310P and a control terminal 310C, the second row of terminals including a pair of ground terminals 310G, a pair of power terminals 310P, a pair of data terminals 310D+, 310D- and A special terminal 310V, the pair of data terminals 310D+, 310D- is a USB2.0 terminal, and the first and second rows of terminals are not provided with a predetermined data terminal having a high transmission speed. Each terminal 310 includes a contact portion 316, a pin 312 and an intermediate offset portion 314. The intermediate offset portion 314 connects the contact portion 316 and the pin 312 and is fixed in the insulator, so that the omitted portion can be fully utilized. Terminal space. The terminal contact portion 316 retains the style of the original standard connector, and the pin 312 is offset for convenient soldering, that is, the pitch of the contact portion 316 of the first and second rows of terminals is maintained at a preset position. The pins 312 are offset from the corresponding contact portions 316 to facilitate soldering. Each terminal 310 is provided with a barb 318 in front of the intermediate offset portion 314 for fixing the terminal 310 in the terminal slot 321 .

16 to 21 show a plug connector 200 of a fourth embodiment, The plug connector 200 includes an insulative housing 202 and a metal housing 204 that surrounds the insulative housing 202. The insulative housing 202 includes a base 206 and a body portion 208 extending from a central portion of the base such that the base forms side wings 210 on either side of the body portion 208. The side wing portion 210 is provided with a through hole 212. The body portion 208 is similar to the body of the previous embodiment and forms a receiving cavity 214. The two rows of terminals 216 are arranged on both sides of the receiving cavity 214, and the receiving cavity 214 is symmetrically arranged at 180 degrees so that the plug connector 200 can be oriented in both directions. Insert the corresponding socket connector. A pair of elastic plates 218 for shielding effects are disposed on the body portion 208 and have elastic contact arms extending into the receiving cavity 214. A pair of insulating sheets 221 are disposed on the elastic plate 218 for isolating the elastic plate 218 from the metal. Housing 204. It will be understood that, as in the first embodiment, the plug connector 200 includes a latch member for latching against a shield plate of the corresponding receptacle connector. The metal housing 204 includes a metal body portion 220 and a pair of metal side wings 222 that are coated on the outer surface of the body portion 208. The metal side wing portion 222 covers the side wing portion 210 of the insulative housing 202. In the butting direction, the through hole 212, The 224 are aligned with each other for screw insertion. The metal casing 204 is provided with a mounting portion 225 behind the metal body portion 220 thereof, and the mounting portion 225 is attached to the base portion 206 of the insulative housing 202. Referring to the twenty-first aspect, the portable computer includes a main body and a detachable display. The main body is provided at one of its long sides with a first rotating element 236 for rotating the display relative to the main body, and the display is also provided with a second rotation. Element 238, plug connector 200 is mounted on circuit board 235 in first rotating element 236, and a pair of resilient elements are disposed behind circuit board 235. In the mating direction, plug connector 200 is floated by the pair of resilient elements 240. The second rotating element 238 is provided with a receptacle connector 244 that interfaces with the plug connector 200. The first rotating element 236 also includes a pair of latching members 242 that are retractable in a lateral direction of the long sides, the latching members 242 latching the second rotating elements 238 of the display when the display is mounted to the mainframe. An improved structure of the metal housing 204 is such that a recess is provided in the surface of the metal housing for latching with the resilient arms of the receptacle connector.

In summary, this creation is in line with the new patent requirements, and the patent application is filed according to law. However, the above 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 who are familiar with the skill of the present invention are equivalent to the equivalent modification or modification according to the spirit of the present creation. All should be covered by the following patent application.

510‧‧‧ plug connector

514‧‧‧Metal housing

516‧‧‧ containment chamber

532‧‧‧ surface

540‧‧‧ Cable

542‧‧‧Power cord

544‧‧‧Grounding core

546‧‧‧Control core

552‧‧‧Contact arm

564‧‧‧ pins

Claims (10)

A plug connector includes an insulative housing, a metal housing covering the outer surface of the insulating body, and two rows of terminals, the insulative housing is provided with a forwardly extending receiving cavity, and the receiving cavity has two opposite side walls. The two rows of terminals include a contact portion and a pin respectively disposed on the two opposite side walls and extending into the receiving cavity, the receiving cavity being symmetrically disposed at 180 degrees to allow the plug connector to be forward and reverse in two directions Inserting a corresponding socket connector; wherein the two rows of terminals comprise a first row of terminals and a second row of terminals; the first row of terminals comprises a pair of grounding terminals and a pair of power terminals, the second row of terminals comprising a pair of power terminals and a pair of ground terminals corresponding to the power terminal and the ground terminal in a row of terminals; the contact portions of the power terminals of the first and second rows of terminals are aligned one by one in a vertical direction, the contact portion The power terminals aligned with each other constitute a power terminal group; the contact portions of the ground terminals of the first and second rows of terminals are aligned one by one in the vertical direction, and the contacts are aligned with each other The sub-group constituting a ground terminal; power terminal pins of each group of contact with each other. The plug connector of claim 1, wherein the two pins of each of the ground terminal groups are in contact with each other. The plug connector of claim 2, wherein the two pins of each of the power terminal groups are horizontally aligned side by side, and the two legs of each of the ground terminal groups are horizontally side by side. Align the alignment. The plug connector of claim 3, wherein the pins of the adjacent terminal groups are alternately arranged in a first row and a second row. The plug connector of claim 1, wherein the plug connector comprises a cable directly connected to the two rows of terminal pins, the cable comprising a one-to-one corresponding connection of the power terminal pins. The four power core wires and the two grounding wires of the ground terminal group are respectively connected one by one. A plug connector includes an insulative housing, a metal housing covering the outer surface of the insulating body, and two rows of terminals, wherein the insulative housing is provided with a forwardly extending receiving cavity, and the receiving cavity has opposite side walls, The two rows of terminals include a contact portion and a pin respectively disposed on the two opposite side walls and extending into the receiving cavity, and the receiving cavity is symmetrically disposed at 180 degrees to allow the plug connector to be inserted into the corresponding socket in both directions. a connector; wherein the plug connector further includes a pair of metal housings fixed to each other; the metal housing is provided with a rear fixing portion, One of the pair of metal casings is provided with a pair of front fixing portions which are tightly surrounded by the lateral end walls of the rear fixing portion and are fixed to each other by welding. The plug connector of claim 6, wherein the metal casing is provided with a pair of fixing plates welded to upper and lower side walls of the rear fixing portion. A plug connector includes an insulative housing, two rows of terminals, and a metal housing surrounding the insulating body; wherein the insulative housing includes a base portion and a body portion extending from a middle portion of the base portion, the base portion being on both sides of the body portion Forming a side wing portion, the side wing portion is provided with a through hole; the body portion is provided with a receiving cavity, the two rows of terminals are arranged on two sides of the receiving cavity, and the receiving cavity is symmetrically arranged at 180 degrees so that the plug connector can be positive and negative Insert the corresponding socket connector in both directions. The plug connector of claim 8, wherein the plug connector comprises a pair of elastic plates and a metal locking member that function as a shielding effect, and the elastic plate is disposed on the body portion and has an extension into the receiving portion. a resilient contact arm of the cavity; the metal latching member having a pair of latching heads extending laterally into the receiving cavity. The plug connector of claim 8 or 9, wherein the metal housing comprises a metal body portion and a pair of metal side wings covered on an outer surface of the body portion, the metal side wing portion covering At the side of the insulating body.