TWM521825U - Receptacle connector - Google Patents

Description

Socket connector

This creation is about a socket connector.

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, which can be inserted into the socket connector in both forward and reverse directions, and the two connectors can transmit high frequency signals during the continuous development process because the connector combination has There are many terminals, grounding lugs and shielding plates, and there are many components, and the size is small, and assembly is extremely difficult.

The purpose of this creation is to provide a socket connector that has better signal immunity.

In order to solve the above technical problem, the present invention provides a socket connector including an insulative housing, two rows of terminals, a shielding plate disposed on the insulative housing, and a metal housing surrounding the insulative housing to form a mating cavity. The insulative housing includes a base and abutting tongue, and the butt tongue defines two opposing surfaces. The two rows of terminals include a contact portion respectively arranged on the mating tongue and a pin extending from the base. The shielding plate includes a first shielding portion and a second shielding portion disposed between the two pairs of terminal contact portions, and the second shielding portion is located between the pins of the two rows of terminals.

In order to solve the above technical problem, the present invention provides a socket connector including an insulative housing, two rows of terminals, a shielding plate, and a metal housing surrounding the insulative housing to form a docking cavity. The insulative housing has a base and an abutting tongue, and the abutting tongue defines an opposite surface. The two rows of terminals include a contact portion respectively arranged on opposite surfaces of the mating tongue and a pin extending from the base. The shielding plate includes a first shielding portion disposed between the butting tongues and located between the two rows of terminal contact portions. The lateral sides of the first shielding portion are shown extending from the overlapping arms, and the overlapping arms contact the metal housing.

Compared with the prior art, the present invention has the following effects: the second shielding portion and the overlapping arm of the present invention can effectively improve the electromagnetic interference problem of high-frequency signal transmission.

150, 650, 390, 480‧‧‧ circuit boards

200, 200a, 200b, 300, 410, 500, 600‧‧‧ socket connectors

210, 334, 418, 552, 56', 602‧‧‧ metal casing

211, 333, 604‧‧‧ docking chamber

212, 610‧‧‧ metal cover

2121‧‧‧ front edge

213, 606‧‧‧ elastic film

215‧‧‧ bumps

217, 636‧‧‧ rear wall

218, 246, 255, 255’‧‧‧ feet

219‧‧ Ears

220‧‧‧Insulated body

222‧‧‧ base

223‧‧‧ side

224, 332‧‧‧ 接接板

225‧‧‧ root

226‧‧‧Terminal slot

228‧‧‧Depression

230‧‧‧ platform

232‧‧‧ channel

240‧‧‧ terminals

242‧‧‧ Main body

244‧‧‧ barbed

2481‧‧‧ front end

248‧‧‧Contacts

250, 250', 316‧‧ ‧ shield

251‧‧‧ first shelter

252‧‧‧Lock side edges

253, 253' ‧ ‧ second shelter

254‧‧‧ lap arm

256‧‧‧ Grounding piece

258, 338‧‧‧through holes

256’‧‧‧ lap

259’‧‧‧Detention Department

260‧‧‧ end wall

260’‧‧‧holding holes

262, 266, 262a, 266a, 218a, 624, 626, 630‧‧‧ mounting feet

264, 620‧‧ ‧ tabs

268‧‧‧ trailing edge

270‧‧‧Flange

310‧‧‧Terminal module

312‧‧‧Upper module

314‧‧‧ Lower module

3161‧‧‧Inside

318‧‧‧Insulator

320‧‧‧Upper terminal

322, 326‧‧‧ insulator

324‧‧‧lower terminal

328‧‧‧Upper grounding piece

330‧‧‧Under the grounding piece

336‧‧‧Front flange

340, 412‧‧‧ metal cover

342, 414‧‧‧ under the metal cover

343, 415, 434, 634 ‧ ‧ the back wall

345, 347‧‧ ‧ elastic arm

346, 348‧‧‧ contact end

3461‧‧‧ Stamping slot

400‧‧‧ modules

440‧‧‧ chipsets

442‧‧‧Metal shielding shell

460‧‧‧Small circuit board

470‧‧‧ card edge connector

561’‧‧‧ docking edge

562‧‧‧ gap

564‧‧‧Extension

581‧‧‧Fixed terminals

582‧‧‧Flexible terminal

612‧‧‧Front cover

614‧‧‧Back cover

616‧‧‧ top wall

618‧‧‧ side wall

622‧‧‧Connecting Department

628‧‧‧ Fixed Department

632‧‧‧High Department

636‧‧‧Upper back wall

652‧‧‧ gap

The first figure is the socket connector of the first embodiment of the present invention installed on the board The second figure is a perspective view of the socket connector and the circuit board separated from the first figure; the third figure is an exploded perspective view of the socket connector in the first figure; and the fourth figure is an exploded perspective view of the other angle of the third figure. The fifth figure is a perspective view further decomposed in the fourth figure; the sixth figure is a further exploded perspective view of the terminal module of the fifth figure; the seventh figure is the positional relationship diagram of the terminal and the shielding plate; the eighth figure is the first figure along the dotted line VIII-VIII is a cross-sectional view of the first figure along the dotted line IX-IX; the tenth is a cross-sectional view of the first figure along the broken line XX; and the eleventh figure is a modified structure of the first embodiment; The twelfth figure is another modified structure of the first embodiment; the thirteenth figure is a deformed structure of the shielding plate; and the fourteenth figure is a perspective view of the unfolded portion of the shielding plate of the thirteenth figure; The figure is a perspective view of the socket connector of the second embodiment of the present invention installed on the circuit board; the sixteenth diagram is a perspective view of the fifteenth figure of the socket connector and the circuit board separated from each other; the seventeenth figure is further exploded according to the sixteenth figure Stereogram Figure 18 is a perspective view showing the socket connector of the third embodiment of the present invention mounted on a circuit board; the nineteenth diagram is a perspective view of the socket connector and the circuit board separated from each other in the eighteenth embodiment; The perspective view of the socket connector in the figure; the twenty-first figure is an exploded view of the terminal module in the twentieth diagram; the twenty-second diagram is a sectional view of the eighteenth figure along the dotted line XXII-XXII; 13 is a schematic diagram of a system having a socket connector according to a fourth embodiment of the present invention; and a twenty-fourth diagram is a perspective view of the socket connector mounted on the circuit board in the twenty-third figure; An exploded perspective view of the socket connector in the figure; a twenty-sixth drawing is a perspective exploded view of a further exploded view of the twenty-fifth figure; a twenty-seventh drawing is an improved structure of the metal casing; and a twenty-eighth figure is a socket connection An improved structure of the terminals in the device; and a twenty-ninth view is a perspective view of a vertical socket connector.

The first embodiment to the tenth figure show a first embodiment of the present invention. The present embodiment is a socket connector 200 mounted on a circuit board 150. The socket connector 200 includes an insulative housing 220, a terminal 240, and an insulative housing 220. Metal housing 210 and metal cover 212, metal cover 212 is soldered to the circuit board by surface soldering technology 150 on. The insulative housing 220 includes a base 222 and a butt tongue 224 that extends forwardly from the base 222 (ie, extending in the mating direction) and the opposing tongue 224 defines two opposing surfaces. The insulative housing 220 is provided with two rows of terminal slots 226 extending in the front-rear direction. The terminal slots 226 extend through the base portion 222 from the mating tongues 224. Each of the terminal slots 226 is formed with an inwardly recessed recess adjacent to the front end surface of the butting tongue 224. 228, the front end of the recessed portion 228 has a protective flange 270 above the recessed portion 228, and the terminal groove 226 is provided with a protruding platform 230 behind the recessed portion 228. A pair of opposed channels 232 are provided on both lateral sides of each of the terminal slots 226 (see Fig. 6). The plurality of terminals 240 are inserted into the corresponding terminal slots 226 from the rear to the front. Each of the terminals 240 includes a horizontal body portion 242, a surface soldering type pin 246 located behind the body portion 242, and a contact portion 248 located in front of the body portion 242. The two sides of the 242 have two pairs of barbs 244. The barbs 244 are interference-fitted with the terminal slots 226 of the insulative housing 220 to fix the terminal 240 in the terminal slot 226. The front end 2481 of the contact portion 248 is inclined inwardly and disposed in the recess. In section 228. The terminals 240 are disposed in two rows, and the pins 246 of the upper row of terminals 240 are laterally offset from the main body portion 242 to the two sides, thereby forming two groups, and the pins 246 of the lower row of terminals 240 remain unchanged with respect to the body portion 242 thereof. No offset. On the other hand, the pins 246 of the two rows of terminals 240 extend in opposite directions. It should be noted that, in the ninth figure, the front half of the contact portion 248 is supported by the platform 230, and the remaining portion of the contact portion 248 and the main body portion 242 are spaced apart from the insulating body 220 by a certain distance in the vertical direction, and are separated by a pair. The thorn 244 is received in the channel 232 for support and fixation.

The metal shielding plate 250 is formed in the insulative housing 220 by the injection molding technique before the terminal 240 is inserted into the insulative housing 220. The insulative housing 220 includes the integrally formed base portion 222 and the abutting tongue plate 224. The shielding plate 250 is embedded. Within the docking tongue 224. After the terminal 240 is inserted, the shield plate 250 is located between the two rows of terminals 240. The shielding plate 250 includes a first shielding portion 251 between the contact portions 248 of the two rows of terminals 240, and a second shielding portion 253 between the pins 246 of the two rows of terminals 240. The first shielding portion 251 is self-aligning the tongue 224. The main body portion 242 of the two rows of terminals 240 is also located on both sides of the first shielding portion 251. The shielding plate 250 is provided with a pair of locking side edges 252 for engaging with the internal locking members of the mating plug connector, a pair of overlapping arms 254 on the lateral sides of the shielding plate 250, and a pair of self-shielding plates 250 laterally A grounding piece 256 is formed by bending the two sides. The overlapping arm 254 extends from the first shielding portion 251 laterally from the side 223 of the base portion 222 of the insulative housing 220 to contact the metal housing 210 (refer to FIG. 8). The two grounding strips 256 and the shielding plate 250 are parallel to each other and respectively located on opposite sides of the two opposite surfaces of the shielding plate 250. The abutting tongue 224 of the insulative housing 220 has a root portion 225 adjacent to the base portion 222. They are respectively attached to the root portion 225 for contacting the elastic plate of the mated plug connector to form a ground path, and the grounding piece 256 has a shielding effect. Please note that the shielding plate 250 is further provided with a plurality of through holes 258. After the insulating body 220 is injection molded, part of the material of the insulating body 220 fills the through holes 258, so that the shielding plate 250 can be better. It is buried in the insulative housing 220, that is, the entire terminal block has good strength.

The metal housing 210 forms a mating cavity 211. The mating tongue 224 extends forwardly into the mating cavity 211. The metal housing 210 is further provided with a plurality of elastic pieces 213 extending inwardly and backwardward and a plurality of inwardly protruding bumps 215. , used to secure the plug connector inserted. The metal housing 210 integrally extends out of the rear wall 217. The rear wall 217 covers the rear end surface of the insulative housing 220. The rear wall 217 is bent with two ears 219 and a surface soldering type pin 218. The ear portion 219 is fixed to the metal housing 210. The trailing edge, not only can It is enough to form a relatively stable metal shell structure, and it can also fully shield the socket connector. The metal housing 210 is generally a bladder-like structure having two opposing side walls and two curved end walls 260 that are connected to each other. The ears 219 are fastened to the rear end of the curved end wall 260, and the end wall 260 A horizontal sheet-like mounting foot 262 is also bent for surface mounting on the circuit board 150. The metal housing 210 includes a bent trailing edge 268 that abuts against the base 222 of the insulative housing 220. The metal cover 212 is fixed to the metal housing 210 (refer to FIG. 10) by the tab 264, and is soldered to the circuit board 150 through the surface of the mounting leg 266.

The socket connector 200 of the present embodiment is completely mounted above the circuit board 150, and the terminal 240 is a terminal slot 226 that is assembled into the insulative housing 220. On the other hand, the rear wall 217 can effectively prevent electromagnetic interference in the front-rear direction. The front end 2481 of the terminal contact portion 248 is inclined inwardly to be received within the recess 228 and partially covered by the protective flange 270 above the recess 228, which may further prevent the risk of the front end 2482 of the terminal contact portion 248 being ejected. It can be understood that the insulative housing 220 is blocked by the rear wall 217 of the metal housing 210 to prevent the rearward movement of the insulative housing 220, and the rear edge 268 abuts against the front vertical surface of the base 222 of the insulative housing 220. Thereby, the forward movement of the insulating body 220 is prevented.

11 is a modified socket connector 200a of the first embodiment, and the structure of the socket connector 200a is substantially the same as that of the socket connector 200 of the first embodiment, the main difference being that the socket connector 200a of the present embodiment The metal housing 210 and the metal cover 210 have through-hole mounting legs 262a, 218a, 266a, that is, the mounting legs 262a, 218a, 266a extend vertically downwards, and are inserted into corresponding through holes of the circuit board to form an electrical connection, that is, The industry's so-called through-hole type circuit board mounting feet. The pins 246 of the upper and lower rows of terminals are still surface-welded pins, The feet extend in opposite directions. The shielding plate 250 is provided with two through-hole type pins 255 which are bent and extended from the second shielding portion 253.

Figure 12 is another modified socket connector 200b of the first embodiment which is substantially identical to the socket connector 200a shown in Figure 11 except that the front edge 2121 of the metal housing 210 is embossed by a plurality of horns The edge is formed to facilitate insertion of the corresponding plug connector.

FIGS. 13 to 14 show a shielded plate 250' of a modified structure, the end of the overlapping portion 256' of the shielding plate 250' is formed with a fastening portion 259', and the fastening portion 259' is bent It is fixed to the main body portion (ie, the first shielding portion) of the shielding plate 250', and prevents the grounding portion 256' from moving obliquely with respect to the shielding plate 250' due to high pressure during the injection molding process. The latching portion 259' is a pair of elastic hooks, and the shielding plate 250' is provided with a latching hole 260', and the elastic hook is inserted into the latching hole 259' to be held in the latching hole 259'. The shield plate 250' has two legs 255' that continue to extend from the second shield portion 253'.

The fifteenth through seventeenth views show the receptacle connector 600 of the second embodiment, which is mounted within the notch 652 of the circuit board 650. The socket connector 600 includes a terminal module (also referred to as an insulative housing, not shown, having the same structure as the third embodiment), a metal housing 602 surrounding the insulative housing, and a metal cover 610. The metal housing 602 forms a bladder-like docking chamber 604, or a pair of interfaces, and the metal housing 602 is provided with a plurality of resilient tabs 606 that extend into the docking chamber 604 for securing to the docked plug connector. The metal housing 602 of the embodiment includes only the capsule abutting portion without the rear cover portion. Thus, the metal housing 602 has a relatively simple structure and is convenient to manufacture. The metal cover 610 includes a front cover portion 612 over the metal housing 602 and a rear cover portion 614 covering the base of the insulating body. The top wall 616 and the side wall 618 of the front cover portion 612 of the 610 are welded to the metal casing 602, and the rear cover portion 614 is formed with a tab 620 fixed in the groove of the top surface of the insulative housing. When viewed from the side, the connection portion 622 of the metal cover 610 connecting the front and rear cover portions 612, 614 is S-shaped, and when the metal case 602 is mounted on the circuit board 650, there is a slight adjustment in the vertical direction. The connecting portion 622 can correct the misalignment caused by the above slight adjustment. After the socket connector 600 is mounted on the electronic device, since the docking cavity 604 needs to be aligned with the port of the electronic device casing, the position of the docking cavity 604 relative to the circuit board 650 can be slightly adjusted to suit the electronic device due to the presence of the connecting portion 622. The outer casing is open. In order to effectively mount the receptacle connector 600 on and in the gap 652 of the circuit board 650, the front cover portion 612 of the metal cover 610 includes a pair of vertically bent mounting legs 624 that include a pair of vertically bent mountings Feet 626. The rear cover portion 614 further includes a pair of fixing portions 628 disposed adjacent to the connecting portion 622, and a pair of mounting legs 630 disposed adjacent to the rear wall 636. The fixing portion 628 is welded to the rear edge of the metal housing 602, thereby enhancing the socket connection. The overall structural strength of the device, particularly adjacent to the strength at the connection portion 622. The mounting foot 630 is adjacent the position of the tab 620. A pair of raised portions 632 are formed on both sides of the connecting portion 622 for shielding electromagnetic interference in the front-rear direction. It should be noted that the metal housing 602 integrally extends with a lower rear wall 634, and the metal cover 610 extends with an upper rear wall 636 attached to the rear end surface of the insulating body, mainly the rear end surface of the insulating body above the circuit board 650 and The rear end faces located in and below the circuit board 650 are shielded to prevent electromagnetic interference in the front-rear direction. Of course, in addition to the method of fixing the metal shell 602 and the metal cover 610 by welding, it may be fixed together by other means, such as a buckle.

The eighteenth through twenty-secondth views show the socket connector 300 of the third embodiment of the present invention, which is mounted in the notch of the circuit board 390. The socket connector 300 The terminal module 310, the metal casing 334 and the upper and lower metal covers 340 and 342 are included. The terminal module 310 is formed by sandwiching a shielding plate 316 between the upper module 312 and the lower module 314 and then molding the intermediate insulator 318. The upper module 312 includes an upper row of terminals 320 and an insulator 322 that is injection molded on the upper row of terminals 320. The lower module 314 includes a lower row of terminals 324 and an insulator 326 that is injection molded on the lower row of terminals 324. The upper and lower modules 312 are disposed. 314 is sandwiched between the shielding plates 316 and then integrally molded with a medium insulator 318. It should be noted that the anti-electromagnetic interference upper grounding piece 328 and the lower grounding piece 330 are buried in the upper and lower modules 312, 314 after the second injection molding. Wherein, the shielding plate 316 is slightly retracted at the corresponding grounding strips 328, 330 (referred to as the inner constricting edge 3161), and can be placed for the grounding piece. As described above, the terminal module 310 is completed by a two-step injection molding technique. The terminal module 310 includes a docking tongue 332 that is located at the front for docking with the docked plug connector.

The metal housing 334 is only an abutting portion, which is fixed to the front portion of the terminal module 310 and surrounds the abutting tongue 332 to form a docking cavity 333. The metal housing 334 has a continuously extending front flange 336 and a through hole. 338, the front flange 336 can not only cover the front edges of the upper and lower metal covers 340, 342, but also provide a more complete shielding effect (relative to the broken front flange). The upper metal cover 340 is fixed to the top wall of the metal housing 334, and the lower metal cover 342 is fixed to the bottom wall of the metal housing 334. The upper metal cover 340 includes an upper rear wall 341 for shielding the rear portion of the terminal module 310, and the lower metal cover 342 includes a lower rear wall 343 for shielding the lower rear portion of the terminal module 310. The upper metal cover 340 is provided with a pair of elastic arms 345 formed by punching out from the metal housing 334, which extend inwardly from the adjacent side edges of the metal housing 334, and have free ends. Passing through the through hole 338 of the metal housing 334 to enter the contact end 346 of the docking cavity 333 (refer to the twenty-second figure) The contact end 346 has a circular convex portion that protrudes toward the mating cavity 333. The punching groove 3461 forming the elastic arm 345 is larger than the elastic arm 345, allowing the elastic arm 345 to be offset within it. The convenient contact tip 346 enters the through hole 338. The lower metal cover 342 is also provided with a plurality of resilient arms 347 having a contact end 348 that passes through the through hole 338 and into the mating cavity 333, the specific structure being the same as the resilient arm 345 of the metal cover 340. The contact ends are used to snap-fit with corresponding plug connectors.

It should be noted that the terminals of the socket connector have a small pitch, but the circuit on the conventional circuit board or the motherboard may not meet such requirements, so a so-called small-hole type circuit board is provided for such a small pitch. The socket connector is used. However, at the same size, the size of the small-hole circuit board is twice that of a normal circuit board. The twenty-third figure provides a solution for satisfying the above-mentioned suitable small-pitch socket connector, which is moderately priced. In the twenty-third figure, a system includes a module 400, a card edge connector 470 and a conventional circuit board 480. The module 400 includes a socket connector 410, a small circuit board 460, and a chip set 440. The small circuit board 460 is a small hole type circuit board and is relatively low in cost. The chip set 440 and the socket connector 410 are both mounted on the small circuit board 460. Wafer set 440 can be covered by metal shield shell 442. The card edge connector 470 is mounted on the circuit board 480 for receiving one end of the small circuit board 460 to form an electrical connection. It can be understood that the card edge connector 470 can be replaced by other types of connectors, such as a cable connector combination for connecting the small circuit board 460 and the circuit board 480; or two socket connectors can be mounted with a chip set. Small boards, or other combinations. The twenty-fourth to twenty-sixth drawings show the specific structure of the above-mentioned socket connector 410. The socket connector 410 includes a terminal module, a metal casing 418 surrounding the terminal module, and upper and lower metal covers 412 and 414. , metal housing 418 and The upper and lower metal covers 412, 414 can collectively shield the entire socket connector 410 in three directions, and the metal housing 418 and the lower metal cover 414 are both provided with lower rear walls 415, 434, of course, the upper metal The cover 412 is provided with an upper rear wall. Likewise, the card edge connector 470 can be mounted within the notch of the circuit board 480 to reduce the overall connector assembly or system height on the circuit board.

The twenty-seventh drawing shows an improved metal housing structure having a curved abutting edge 561' which, when viewed from the side, is a forwardly projecting curved structure, the curved structure It is disposed on the end wall of the metal casing 56', and the arc structure protrudes forward from the upper and lower walls. The twenty-eighthth embodiment shows an improved structure of the receptacle connector terminal having a fixed terminal 581 and a resilient terminal 582 which is located in front of the resilient terminal 582.

The twenty-ninth figure shows a vertical type receptacle connector 500 (in which the insulative housing is not shown), and the receptacle connector 500 is directly mounted vertically on the circuit board, that is, the mating direction is perpendicular to the circuit board. The socket connector 500 includes a metal housing 552 surrounding the insulative housing. The bottom of the metal housing 552 is torn with a mounting portion that is outwardly offset. A gap 562 is formed between the mounting portion and the insulative housing. 564, used to shield the gap 562, the extension 564 also facilitates mounting the receptacle connector 500 on the circuit board. On the other hand, the two end walls of the metal casing 552 are provided with a grounding leg (not shown), which can effectively improve the effect of preventing electromagnetic interference.

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 any equivalent modification or change made by a person familiar with the skill of the present invention in accordance with the spirit of the present invention should be Covered in the following patent application In the circumference, for example, the forward direction referred to herein is the docking direction, and the up and down direction is relatively applicable, and the same applies to the electrical connector vertically mounted on the circuit board.

210‧‧‧Metal housing

212‧‧‧metal cover

215‧‧‧ bumps

217‧‧‧ Back wall

218‧‧‧ feet

220‧‧‧Insulated body

246‧‧‧ feet

248‧‧‧Contacts

250‧‧‧shading board

254‧‧‧ lap arm

260‧‧‧ end wall

262, 266‧‧‧ mounting feet

264‧‧‧ 片片

268‧‧‧ trailing edge

Claims (11)

A socket connector includes an insulative housing, a terminal, a shielding plate and a metal housing surrounding the insulative housing to form an abutting cavity; wherein the insulative housing comprises an integrally formed base and a butt tongue, the shielding plate being embedded in the butt tongue The insulative housing is provided with a terminal slot extending from the base of the butt tongue, the terminal includes a main body portion, a contact portion and a pin at both ends of the main body portion, and the main body portion is provided with a barb; the terminal is rearward The terminal slot is inserted in front and the interference is fixed in the terminal slot, and the contact portion of the terminal is arranged on the mating tongue, and the pin of the terminal extends out of the base. The socket connector of claim 1, wherein the terminal slot is formed with an inwardly recessed recess adjacent to a front end face of the butt tongue, and a front end of the recess has a protective flange above the recess; The front end of the terminal contact portion is inclined inwardly to be accommodated in the recessed portion, and is partially covered by the protective flange above the recessed portion. The socket connector of claim 2, wherein the terminal slot is provided with a protruding platform behind the recessed portion, and the front half of the contact portion is supported by the platform, and the remaining portion of the contact portion and the main body portion are The insulating bodies are spaced apart by a certain distance in the vertical direction. The socket connector of claim 1, wherein the main body portion of the terminal has two pairs of barbs on lateral sides thereof, and the barbs interfere with the terminal slot to fix the terminal in the terminal slot. . The socket connector of claim 4, wherein the terminal grooves are provided with grooves on both lateral sides thereof, and the barbs are fixed in the channels. The socket connector according to any one of claims 1 to 4, wherein the terminals are arranged in two rows; the shielding plate comprises a first shielding portion between the contact portions of the two rows of terminals a second shielding portion located between the pins of the two rows of terminals; the second shielding portion is formed by vertically bending from the first shielding portion. The socket connector according to any one of claims 1 to 4, wherein the terminals are arranged in two rows; the pair of overlapping arms are disposed on two lateral sides of the shielding plate, and the overlapping arms are laterally A side edge of the base of the insulative housing extends out to contact the metal housing. The socket connector of any one of clauses 1 to 4, wherein the socket connector comprises two grounding strips, the grounding strip and the shielding plate are parallel to each other and respectively located on opposite surfaces of the shielding plate On both sides. The socket connector of any one of claims 1 to 4, wherein the metal housing integrally extends out of the rear wall, the rear wall is bent with two ears; the metal housing has two Opposite side walls and two curved end walls, the four walls being connected to each other; the ears being held at the rear end of the curved end wall. The receptacle connector of any one of clauses 1 to 4, wherein the receptacle connector comprises a metal cover, the metal cover being secured to the metal housing by a tab provided therewith. A socket connector for directly mounting on a circuit board, the socket connector comprising an insulative housing, a metal housing surrounding the insulative housing, wherein the bottom of the metal housing is torn outwardly A mounting portion is formed with a gap formed between the mounting portion and the insulative housing, and the mounting portion extends horizontally horizontally out of the extending portion for shielding the gap.