CN204793279U - Electric connector - Google Patents

Abstract

The utility model discloses an electric connector, electric connector contains an insulator, insulator has a basal portion and is located a hyoplastron of basal portion front end, arrange about a plurality of terminals are set firmly in in the basal portion, in go up arranging each the terminal have a first contact site show in the upper surface of hyoplastron, in lower row each the terminal have a second contact site show in the lower surface of hyoplastron, go up to arrange a plurality of with lower row the terminal comprises two ground terminal, two power supply terminals and four signal terminal respectively, a shielding piece, the shielding piece set firmly in the basal portion with the hyoplastron, and the part is located first contact site with between the second contact site, electric connector can follow two positive and negative directions and insert butting connector, has prolonged its life, and is also convenient the miniaturized design of electric connector.

Description

electrical connector

technical field

The utility model relates to a small electric connector, in particular to an electric connector which can transmit large current and can be inserted into the opposite direction of the butt connector.

Background technique

Universal Serial Bus (USB, Universal Serial Bus) is a very common connection interface for computers. USB is an external bus that supports plug-and-play installation. Using USB, users can connect or disconnect the connection between the computer and its external devices without shutting down or restarting the computer. In particular, currently portable electronic products are usually equipped with small USB connectors to achieve the purpose of plug and play in order to connect to computers conveniently. However, as electronic products become thinner and lighter, USB interfaces are also smaller and integrated. The charging interface of the device is provided, but the traditional high-speed USB electrical connector has nine terminals arranged in two rows on the same side of the tongue plate, which is not conducive to the miniaturization of the electrical connector, and only one conductive terminal is used for the nine terminals. The current transmission cannot meet the current transmission of electronic equipment with more and more functions and more and more power. In addition, since the nine terminals are located on the same side of the tongue plate, during the insertion process, the traditional electrical connector must be inserted into the butt connector towards one side, so the electrical connector may be damaged due to reverse insertion in actual use, reducing the electrical connection. service life of the device.

Therefore, it is necessary to design an improved electrical connector to overcome the above problems.

Contents of the invention

In view of the problems faced by the background technology, the purpose of this utility model is to provide a four power terminals, and the terminals are symmetrically arranged on the upper surface and the lower surface of the tongue plate, and a shielding sheet is held in the middle of the tongue plate, which can realize An electrical connector that transmits high current stably and can be inserted into a mating connector in both directions.

In order to achieve the above purpose, the utility model adopts the following technical means: an insulating body, the insulating body has a base and a tongue plate located at the front end of the base; Each of the terminals in the row has a first contact portion exposed on the upper surface of the tongue plate, and each of the terminals in the lower row has a second contact portion exposed on the lower surface of the tongue plate; The plurality of terminals in the row and the lower row are composed of two ground terminals, two power terminals and four signal terminals respectively; a shielding sheet, the shielding sheet is fixed on the base and the tongue, and part Located between the first contact portion and the second contact portion.

Further, the four signal terminals in the upper row are located in the middle of the tongue plate, and include a first signal terminal, a second signal terminal, a third signal terminal and a fourth signal terminal, The first signal terminal and the second signal terminal are adjacently arranged and located between the third signal terminal and the fourth signal terminal, the tongue plate has a first side and a second side, and the upper The two ground terminals in the row include a first ground terminal and a second ground terminal, the first ground terminal is adjacent to the edge of the first side, and the second ground terminal is adjacent to the second side The edges are adjacent, the power terminals in the upper row include a first power terminal and a second power terminal, the first power terminal is located between the first ground terminal and the third signal terminal, the The second power terminal is located between the second ground terminal and the fourth signal terminal.

Further, each of the terminals in the upper row also has a fixed portion, and the width of the fixed portion of the first signal terminal is consistent with the width of the first contact portion.

Further, each of the terminals in the upper row includes a first extension part, the first extension part is fixed on the base part, and a first bending part formed by bending the front end of the first extension part upwards, The first bending part extends forward to form a second extension part, the second extension part is fixed at the rear end of the tongue plate, and the front end of the second extension part is bent downward to form a first extension part. Two bending parts, and the first extension part is parallel to the front end of the first contact part.

Further, each of the terminals also has a fixing portion, one side of the fixing portion of the ground terminal and the fixing portion of the power terminal are bent and extended forward to form the first contact portion, the The distance between the first contact portion of the ground terminal and the first contact portion of the adjacent power terminal is greater than the distance between the fixing portions of the two.

Further, each of the terminals also has a fixing part, the shielding sheet has a body part fixed on the base part and the tongue plate, the body part is provided with a plurality of holes arranged in two rows, the first A row of the holes corresponds to the fixing portion, and a second row of the holes corresponds to the first contact portion.

Further, the rear end of the tongue plate has a flat plate, and the flat plate is provided with a matching groove and two through grooves.

Further, the insulating body includes a first body and a second body, the lower row of terminals is insert-molded with the first body to form a first module, and the upper row of terminals is insert-molded with the second body A second module is formed, and the second module is assembled on the first module from back to front.

Further, the electrical connector has an inner metal shell, and the inner metal shell has a main body portion attached to the rear end of the tongue plate, and the main body portion extends backward to form a covering portion attached to the base portion, so that The two sides of the main body part extend forward to form a frame part, the frame part has two side plates and a front plate, the tongue plate has two side faces and a front end face, the side plates stick to the side faces, the front The board is attached to the front end surface.

Further, the two sides are respectively provided with a groove, and the two side plates are respectively provided with a matching part corresponding to the position of the groove and are close to the groove.

Further, there is an extension piece extending backward from the edge of the front plate, and the extension piece is attached to the front end of the surface of the tongue plate.

Further, the terminals in the upper row and the terminals in the lower row are arranged symmetrically on the tongue plate, each terminal in the upper row has a first welding portion extending out of the base, and each terminal in the lower row Each has a second welding portion extending out of the base, the first welding portion and the second welding portion are arranged in three rows, and the second welding portions are arranged in two rows.

Compared with the prior art, the utility model has the following beneficial effects:

In the electrical connector, the upper and lower rows of terminals are symmetrically arranged on the upper surface and the lower surface of the tongue plate, so that the electrical connector can be inserted into the butt connector from both directions, because the tongue The board is fixed with the shielding sheet located between the terminals in the upper row and the terminals in the lower row to shield the signal interference, realize the stable transmission of the signal of the electrical connector, and will not damage the electrical connector due to reverse insertion. The connector prolongs the service life of the electrical connector and facilitates the miniaturization design of the electrical connector. In addition, two power terminals are respectively arranged on the upper surface and the lower surface of the tongue plate, which significantly increases the number of power terminals, satisfies the transmission of large currents, and satisfies the use conditions of electronic equipment with more functions and higher power.

【Description of drawings】

Figure 1 is a three-dimensional exploded view of the electrical connector of the present invention;

Fig. 2 is a partial three-dimensional exploded view of the electrical connector of the present invention;

Fig. 3 is a front sectional view of the electric connector of the present invention assembled;

Figure 4 is a cross-sectional view of the electrical connector of the present invention after assembly;

Fig. 5 is a three-dimensional exploded view of the second embodiment of the electrical connector of the present invention;

Fig. 6 is a three-dimensional exploded view of the third embodiment of the electrical connector of the present invention;

Fig. 7 is a partial three-dimensional exploded view of the third embodiment of the electrical connector of the present invention;

Fig. 8 is a three-dimensional exploded view of the fourth embodiment of the electrical connector of the present invention;

FIG. 9 is a partially exploded perspective view of the fourth embodiment of the electrical connector of the present invention.

DESCRIPTION OF DRAWING NUMERALS FOR SPECIFIC EMBODIMENTS

Electrical connector 100 The first module 101 Insulation body 1 First Body 11 Base 111 Containment Space 1111 Assembly slot 1112 tongue plate 112 Flat section 1121 Through groove 1122 front face 1123 first side 1124 Second side 1125 Groove 1126 Mating groove 1127 Second module 102 Second body 12 Protrusion 121 Terminal 2 first contact portion 21 second contact portion 22 first welding part 23 Second welding part 24 Fixed part 25 first extension 251 The first bending part 252 Second extension 253 Second bending part 254 ground terminal a The first ground terminal a1 Second ground terminal a2 Power terminal b first power supply terminal b1 Second power supply terminal b2 Signal terminal c first signal terminal c1 Second signal terminal c2 third signal terminal c3 Fourth signal terminal c4 Shield 3 Body part 31 hole 311 ground pin 32 Inner metal shell 4 Main body 41 Covering part 42 Frame part 43 side panel 431 Masking sheet 4301 Mating groove 4311 Front plate 432 Extension piece 4321 Outer metal shell 5 Enclosure 51 Rib 501 Shrapnel 511 Engagement groove 512 Assembly Department 513 Fastening part 514 Shielding shell 52 Fastening groove 521 The first solder pin 522 The second welding pin 523

【Detailed ways】

In order to facilitate a better understanding of the purpose, structure, features, and effects of the utility model, the utility model will be further described in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1 and Figure 5, the utility model electrical connector 100 includes an insulating body 1; a plurality of terminals 2 are fixed on the insulating body 1; a shielding sheet 3 is fixed on the insulating body 1; The metal shell 4 covers and is fixed on the insulating body 1, and an outer metal shell 5 is framed outside the insulating body 1 and the inner metal shell 4 to form an insertion space.

As shown in Figures 1 to 4, it is the first embodiment of the electrical connector of the present invention, the insulating body 1 includes a first body 11 and a second body 12, and the first body 11 has a base 111 And a tongue plate 112 extends forward from the front end of the base 111, a receiving space 1111 is provided at the rear end of the base 111, and the second body 12 is assembled on the base 111 from back to front and stored in the receiving space 1111. Both sides of the base portion 111 are respectively provided with an assembly groove 1112 , and the upper surface of the second body 12 is provided with a protruding portion 121 . In other embodiments, the first body 11 and the second body 12 can be integrally formed or assembled in any other manner, and the base 111 and the tongue plate 112 can also be formed in an assembled manner, which is not mentioned here. limit. The rear end of the tongue plate 112 is provided with a flat plate portion 1121, and two through grooves 1122 are provided on the flat plate portion 1121 corresponding to the position of the abrasive tool (not shown), so as to facilitate the crimping process of the abrasive tool (not shown). The terminal 2 can be firmly fixed on the tongue plate 112 . The tongue plate 112 also has two sides (unlabeled) and a front end 1123, the two sides include a first side 1124 and a second side 1125, the first side 1124 and the second side 1125 The middle ends are respectively provided with a groove 1126, and during the process of mating the electrical connector 100 with the butt connector (not shown), the groove 1126 and the fixed elastic piece (not shown) of the butt connector (not shown) not shown), and position the docking connector (not shown).

As shown in FIGS. 1 to 2 , a plurality of terminals 2 are fixed in the base portion 111 in an up and down row, and each terminal 2 in the upper row has a first contact portion 21 exposed on the top of the tongue plate 112. Surface, each of the terminals 2 in the lower row has a second contact portion 22 exposed on the lower surface of the tongue plate 112, the first contact portion 21 and the second contact portion 22 are used to communicate with the Docking connector (not shown) conducts wires. The plurality of terminals 2 in the upper row and the lower row are arranged symmetrically on the upper surface and the lower surface of the tongue plate 112 and are respectively composed of two ground terminals a, two power supply terminals b and four signal terminals c, wherein The above-mentioned signal terminal c is non-high-speed. In other embodiments, only two signal terminals c and two reserved terminals (unlabeled) can be provided, that is, the type of the terminal 2 can be adjusted in due course, so that the functionality of the electrical connector 100 is enhanced and better mate with the mating connector (not shown).

Each of the terminals 2 also has a fixed portion 25, the width of the fixed portion 25 of the middle two signal terminals c is the same as the width of the first contact portion 21, and the other terminals in the upper row The width of the fixed portion 25 of 2 is greater than the width of the first contact portion 21, and one side of the fixed portion 25 of the ground terminal a and the fixed portion 25 of the power terminal b are bent and forward The first contact portion 21 is extended and formed, and the distance between the first contact portion 21 of the ground terminal a and the first contact portion 21 of the adjacent power terminal b is greater than that of the fixing portion 25 In order to change the distance of the first contact portion 21 to match the frequency of the butt connector (not shown).

Each of the terminals 2 in the upper row also has a first welding portion 23 extending out of the second body 12, and the first welding portions 23 are arranged in a row so as to be surface-welded to an external circuit board (not shown). Each of the terminals 2 in the lower row has a second welding portion 24 extending out of the base portion 111, and the second welding portions 24 are arranged in two rows at intervals before and after, so that they can be welded with perforated holes. mounted on the external circuit board (not shown).

As shown in Figure 1, the four signal terminals c in the upper row are located in the middle of the tongue plate 112, and include a first signal terminal c1, a second signal terminal c2, and a third signal terminal c3 and a fourth signal terminal c4, the first signal terminal c1 and the second signal terminal c2 are adjacently arranged and located between the third signal terminal c3 and the fourth signal terminal c4, the Tongue plate 112 has a first side 1124 and a second side 1125, the two ground terminals a in the upper row include a first ground terminal a1 and a second ground terminal a2, the first ground terminal a1 and The edge of the first side 1124 is adjacent, the second ground terminal a2 is adjacent to the edge of the second side 1125, and the power terminal b in the upper row includes a first power terminal b1 and a second power terminal b2, the first power terminal b1 is located between the first ground terminal a1 and the third signal terminal c3, and the second power terminal b2 is located between the second ground terminal a2 and the fourth signal terminal Between c4. Correspondingly, there are also eight terminals 2 in the lower row, which are distributed correspondingly to the terminals 2 in the upper row, so that the butt connector (not shown) can be inserted into the electrical connector 100 both front and back.

Due to the large number of terminals 2 and the limited volume of the electrical connector 100, a plurality of terminals 2 are densely arranged in the insulating body 1, which makes it very difficult to assemble the terminals 2, so in In this embodiment, the lower row of terminals 2 is inlaid and integrally formed on the first body 11 to form a first module 101, and the upper row of terminals 2 is inlaid and integrally formed on the second body 12 to form a second module. 102, the second module 102 is assembled on the first module 101 from back to front.

As shown in Figure 1, Figure 3 and Figure 4, each of the terminals 2 in the upper row includes a first extension 251, the first extension 251 is fixed on the base 111, and the first extension The front end of the part 251 is bent upward to form a first bent part 252, and the first bent part 252 is extended forward to form a second extension part 253, and the second extension part 253 is fixed on the flat part 1121 and inclined upwards at a small angle, so as to prevent the first contact portion 21 from warping up on the tongue plate 112 during the crimping and crimping process of the upper row of terminals 2 and the tongue plate 112, causing damage The electrical connector 100; the front end of the second extension part 253 is bent downward to form a second bent part 254, and the second bent part 254 extends forward to form the first contact part 21, and The first extension part 251 is parallel to the front end of the first contact part 21, so that when the second module 102 is assembled to the first module 101, it is easy to align with the terminal hole on the tongue plate 112 ( unnumbered), and ensure that the first contact part 21 and the fixed part 25 are located on the same plane and exactly located on the tongue plate 112 after the terminal 2 is embedded in the insulating body 1 and crimping is completed The upper surface of the upper surface, so that when the electrical connector 100 is inserted into the mating connector (not shown), the terminals 2 will not be damaged.

As shown in FIG. 1 , a shielding sheet 3 has a body portion 31 fixed on the base portion 111 and the tongue plate 112, and is located between the upper row of terminals 2 and the lower row of terminals 2, on the shielding Signal interference between the terminals 2 in the first row and the terminals 2 in the lower row ensures stable signal transmission of the electrical connector 100 . The body portion 31 is provided with a plurality of holes 311 arranged in two rows, the holes 311 in the first row correspond to the fixing portion 25 , and the holes 311 in the second row correspond to the first contact portion 21 The hole 311 structure can effectively increase the impedance of the upper row of terminals 2 and the lower row of terminals 2 , thereby improving the transmission efficiency of the entire electrical connector 100 . The two sides of the body part 31 also partially extend the first side 1124 and the second side 1125, which effectively prevents excessive wear of the tongue plate 112 during the insertion process and prolongs the electrical connector. 100 service life, the rear end of the body part 31 is provided with two grounding pins 32 extending out of the base part 111, which are welded to the circuit board (not shown) to ground the shielding piece 3 .

As shown in Figures 1 to 4, the outer metal shell 5 covers the periphery of the base 111 and the tongue plate 112, and the outer metal shell 5 includes a cladding shell 51 and a shielding shell 52, so The covering shell 51 covers the periphery of the base 111 and the tongue plate 112 , and the shielding shell 52 is arranged outside the covering shell 51 to form double shielding and minimize signal loss.

The upper surface and the lower surface of the covering shell 51 are provided with a plurality of elastic pieces 511, and the elastic pieces 511 are in contact with the fixed elastic pieces of the docking connector (not shown) during the insertion process to form a conduction. Improve the EMI effect during signal transmission. The upper surface of the covering shell 5 is respectively provided with an engaging groove 512 corresponding to the position of the protruding portion 121, and is respectively provided with an assembling portion 513 corresponding to the position of the assembling groove 1112. By the engaging groove 512 and the The protruding part 121 is matched, the fitting part 513 is matched with the fitting groove 1112, and the covering shell 51 is fixed with the base part 111; part 514, the position of the shielding shell 52 corresponding to the fastening part 514 is respectively provided with a fastening groove 521, and the fastening groove 521 is matched with the fastening part 514, so that the cladding shell 51 and the The shielding shell 52 is firmly assembled together;

Both sides of the shielding shell 52 are respectively provided with a first welding leg 522 and two second welding legs 523, the first welding leg 522 and the second welding leg 523 are staggered forward and backward, and the first welding leg 522 The feet 522 are adjacent to the side of the base 111 and adjacent to the rear end of the base 111, the two second welding feet 523 are arranged in two rows near the side of the tongue 112, and the fastening groove 521 is located between the two second soldering pins 523, so that the electrical connector 100 can be stably installed on the circuit board (not shown). In other embodiments, the cladding shell 51 and the shielding shell 52 can be welded together or assembled in any other way, and the number and position of the first welding pin 522 and the second welding 523 can be timely Alignment, as long as the electrical connector 100 can be firmly installed on the circuit board (not shown), it is not limited here.

As shown in Figure 5, it is the second embodiment of the electrical connector of the present invention, the difference between the second embodiment and the first embodiment is that the upper surface and the lower surface of the covering shell 51 are provided with a plurality of ribs 501 It is connected with the fixed shrapnel of the docking connector (not shown) to improve the EMI effect during signal transmission. Further, the flat part 1121 is also provided with a matching groove 1127. When plugged in, the docking The front end of the fixing elastic piece of the connector (not shown) is accommodated in the matching groove 1127 , so that people can easily identify whether the electrical connector 100 is mated with the mating connector (not shown).

As shown in Figure 6 and Figure 7, it is the third embodiment of the electrical connector 100 of the present invention, the difference between the third embodiment and the first embodiment is that the electrical connector 100 also includes the inner metal shell 4, The inner metal shell 4 has a main body portion 41 attached to the flat plate portion 1121 , the main body portion 41 extends backward to form a covering portion 42 attached to the base portion 111 , and both sides of the main body portion 41 extend forward A frame portion 43 is formed, the frame portion 43 has two side panels 431 and a front panel 432, the side panel 431 is attached to the first side 1124 and the second side 1125, and the front panel 432 is attached to the The front end surface 1123 and the side plate 431 are provided with a matching groove 4311 corresponding to the position of the groove 1126 and closely attached to the groove 1126, which effectively reduces the wear on the edge of the tongue plate 112 during insertion; An extension piece 4321 extends backward from the edge of the front plate 432 , and the extension piece 4321 covers the front end of the tongue plate 112 to protect the tongue plate 112 and prolong its service life.

As shown in Figure 8 and Figure 9, it is the fourth embodiment of the electrical connector 100 of the present invention. There is a shielding sheet 4301, the shielding sheet 4301 covers the left and right edges of the tongue plate 112 to protect the tongue plate 112, further, the shielding sheet 4301 can replace the ground terminal a, so that the electrical connector 100 The ground terminal a is no longer set up separately, which reduces the production cost and processing difficulty of the electrical connector 100 .

To sum up, the utility model electrical connector 100 has the following beneficial effects:

(1) In the electrical connector 100, the upper and lower rows of terminals 2 are symmetrically arranged on the upper surface and the lower surface of the tongue plate 112, so that the electrical connector 100 can be viewed from both front and back directions. Insert the docking connector (not shown), because the tongue plate 112 is fixed with the shielding sheet 3 located between the terminals 2 in the upper row and the terminals 2 in the lower row, shielding the signal interference, realizing the The signal of the electrical connector 100 is transmitted stably, and the electrical connector 100 will not be damaged due to reverse insertion, prolonging the service life of the electrical connector 100 and facilitating the miniaturization design of the electrical connector 100 .

(2) The upper surface and the lower surface of the tongue plate 112 are respectively provided with two power terminals b, so that the number of the power terminals b is significantly increased, which satisfies the transmission of large currents, and has more functions and greater power. Conditions of use of the device.

(3) The groove 1126 provided on the flat part 1121 of the tongue plate 112 is positioned in cooperation with the fixed elastic piece of the docking connector (not shown), so that people can easily identify the electrical connector 100 and the Check whether the docking connector (not shown) is plugged in place, which is convenient for use.

(4) The extension piece 4321 and the shielding piece 4301 of the inner metal shell 4 cover the edge of the surface of the tongue plate 112, which well avoids excessive wear of the tongue plate 112 and prolongs the In order to extend the service life of the electrical connector 100 , the shielding sheet 4301 can also replace the ground terminal a, which reduces the number of the terminals 2 and reduces the production cost and assembly difficulty of the electrical connector 100 .

The above detailed description is only a description of the preferred embodiment of the present utility model, and does not limit the patent scope of the present utility model. Therefore, all equivalent technical changes made by using the instructions and illustrations of this invention are included in this utility model. within the scope of the new patent.

Claims (12)

1. An electrical connector, characterized in that, comprising: An insulating body, the insulating body has a base and a tongue plate located at the front end of the base; A plurality of terminals are fixed in the base in an up and down row, each of the terminals in the upper row has a first contact portion exposed on the upper surface of the tongue plate, and each of the terminals in the lower row has a The second contact portion is exposed on the lower surface of the tongue plate; the plurality of terminals in the upper row and the lower row are respectively composed of two ground terminals, two power terminals and four signal terminals; A shielding sheet, the shielding sheet is fixed on the base portion and the tongue plate, and partly located between the first contact portion and the second contact portion. 2. The electrical connector according to claim 1, wherein the four signal terminals in the upper row are located in the middle of the tongue plate, and include a first signal terminal, a second signal terminal, A third signal terminal and a fourth signal terminal, the first signal terminal and the second signal terminal are adjacently arranged and located between the third signal terminal and the fourth signal terminal, the The tongue plate has a first side and a second side, and the two grounding terminals in the upper row include a first grounding terminal and a second grounding terminal, and the first grounding terminal is adjacent to the edge of the first side. Adjacent, the second ground terminal is adjacent to the second side edge, the power terminals in the upper row include a first power terminal and a second power terminal, and the first power terminal is located on the first Between the ground terminal and the third signal terminal, the second power supply terminal is located between the second ground terminal and the fourth signal terminal. 3. The electrical connector according to claim 2, wherein each of the terminals in the upper row also has a fixed portion, and the width of the fixed portion of the first signal terminal and the first contact portion Same width. 4. The electrical connector according to claim 1, wherein each of the terminals in the upper row includes a first extension, the first extension is fixed on the base, and the first extension The front end of the upper part is bent upward to form a first bending part, and the first bending part is extended forward to form a second extension part, and the second extension part is fixed on the rear end of the tongue plate, so The front end of the second extension part is bent downward to form a second bent part, and the first extension part is parallel to the front end of the first contact part. 5. The electrical connector according to claim 1, wherein each of the terminals further has a fixing portion, and one side of the fixing portion of the ground terminal and the fixing portion of the power terminal are bent And extending forward to form the first contact portion, the distance between the first contact portion of the ground terminal and the first contact portion of the adjacent power terminal is greater than the distance between the fixing portions of the two. 6. The electrical connector according to claim 1, wherein each of the terminals further has a fixing portion, and the shielding sheet has a body portion fixed to the base portion and the tongue plate, and the body portion The portion is provided with a plurality of holes arranged in two rows, the holes in the first row correspond to the fixing portion, and the holes in the second row correspond to the first contact portion. 7. The electrical connector as claimed in claim 1, wherein the rear end of the tongue plate has a flat portion, and the flat portion is provided with a matching groove and two through grooves. 8. The electrical connector according to claim 1, wherein the insulating body comprises a first body and a second body, and the lower row of terminals is embedded with the first body to form a first module The upper row of terminals is embedded with the second body to form a second module, and the second module is assembled on the first module from back to front. 9. The electrical connector according to claim 1, characterized in that: the electrical connector has an inner metal shell, and the inner metal shell has a main body portion attached to the rear end of the tongue plate, and the main body portion faces extending rearwardly to form a cladding portion to cover the base portion, the two sides of the main body extend forward to form a frame portion, the frame portion has two side plates and a front plate, and the tongue plate has two side faces and a front end The side panel is attached to the side surface, and the front panel is attached to the front end surface. 10 . The electrical connector as claimed in claim 9 , wherein a groove is respectively provided on the two side surfaces, and a mating portion is respectively provided on the two side plates corresponding to the groove and closely attached to the groove. 11 . 11 . The electrical connector as claimed in claim 10 , wherein an extension piece extends backward from the edge of the front plate, and the extension piece sticks to the front end of the tongue plate surface. 12 . 12. The electrical connector according to claim 1, wherein the terminals in the upper row and the terminals in the lower row are arranged symmetrically on the tongue plate, and each terminal in the upper row has a Each terminal in the lower row has a second welding portion extending out of the base, the first welding portion and the second welding portion are arranged in three rows, wherein the second The welding parts are arranged in two rows.