TWI558018B - Electrical connector and assembly of the same - Google Patents

Description

Electrical connector and combination thereof

The present invention relates to an electrical connector and a combination thereof, and more particularly to an electrical connector having an anti-slant insertion and a forward and reverse insertion function, and combinations thereof.

The USB (Universal Serial Bus) plug electrical connector of the prior art includes an insulating body provided with a tongue plate, a conductive terminal fixed on the tongue plate of the insulating body, and a metal covering the periphery of the insulating body. The outer casing has a substantially tubular structure, and the upper surface and the lower surface of the metal casing have a flat structure, and the USB socket electrical connector that interfaces with the USB plug electrical connector includes a tongue. The insulator of the board, the terminal fixed in the tongue of the insulator and the metal shell covered on the periphery of the insulator, the metal shell also has a substantially rectangular tubular structure, and the upper and lower surfaces thereof also have a flat structure.

However, the connector of the prior art has a flat shape on the upper and lower surfaces of the metal casing. In the course of use, if the user improperly uses the USB plug electrical connector, the USB plug electrical connector is obliquely inserted into the docked USB socket electrical connector. In the middle, the USB plug electrical connector easily hits the front end of the tongue of the USB socket electrical connector, but the USB type connector is small, and the above-mentioned mis-insertion action easily causes the tongue and the USB plug of the USB socket electrical connector. Damage to the connector end of the connector, which affects the service life. In addition, the USB plug electrical connector in the prior art is generally not reversible, and there are many inconveniences in the use process.

Therefore, in view of the above problems, it is necessary to provide improved electrical connectors and combinations thereof to solve the above technical problems.

The technical problem to be solved by the present invention is to provide an electrical connector having anti-slant insertion and realizing the function of forward and reverse insertion and a combination thereof.

In order to solve the above technical problem, the present invention adopts the following first technical solution: an electrical connector assembly comprising a plug electrical connector and a socket electrical connector that interfaces with the plug electrical connector, the plug electrical connector comprising an insulative body, a setting a plurality of conductive terminals in the insulating body and a shielding shell covering the periphery of the insulating body, the shielding housing includes a top plate and a bottom plate disposed opposite to each other, and left and right side plates connecting the top plate and the bottom plate, the socket electrical connector mainly comprises An insulator, a socket terminal fixed in the insulator, and a metal casing surrounding the insulator, the metal casing comprising opposite upper and lower plates and left and right side walls for connecting the upper plate and the lower plate, the top plate A top surface recessed portion is formed in the bottom plate direction, and the bottom plate is recessed toward the top plate to form a bottom surface concave portion. The upper plate and the lower plate are respectively recessed to form an upper plate concave portion and a lower plate concave portion, and the plug electrical connector and the socket are electrically connected. When the connector is butted, the upper plate recess and the lower plate recess are respectively mated with the top surface concave portion and the bottom surface concave portion.

Further, the top recess and the bottom recess extend rearward from the end edge of the plug electrical connector and extend not less than the insertion depth of the plug electrical connector when the plug electrical connector is mated with the receptacle electrical connector. The plate recess and the lower plate recess extend rearward from the plug end edge of the socket electrical connector and extend for a length not less than the insertion depth of the plug electrical connector when the plug electrical connector is mated with the receptacle electrical connector.

Further, the top concave portion is disposed symmetrically with the bottom surface concave portion, the upper plate concave portion is disposed symmetrically with the lower plate concave portion, and the plug electrical end of the plug electrical connector is bilaterally disposed The thickness of the portion of the socket electrical connector is greater than the thickness of the intermediate portion.

Further, the insulative housing of the plug electrical connector includes oppositely disposed top and bottom walls and left and right side walls connecting the top wall and the bottom wall, and the top wall, the bottom wall and the left and right side walls are collectively arranged to form a plug The conductive terminal includes a row of conductive terminals disposed on the top wall and a lower row of conductive terminals disposed on the bottom wall, and the insulator of the socket electrical connector is disposed to be correspondingly received in the plugging space. a tongue plate, when the plug electrical connector is forwardly mated with the socket electrical connector, the conductive terminal of the lower row of the plug electrical connector is directly electrically connected to the socket terminal of the docking receptacle electrical connector; When the plug electrical connector is reversely connected to the socket electrical connector, the upper conductive terminal of the plug electrical connector is directly electrically connected to the socket terminal on the docking receptacle electrical connector.

In order to solve the above technical problem, the present invention adopts the following technical solution 2: a plug electrical connector includes an insulating body, a plurality of conductive terminals disposed in the insulating body, and a shielding shell covering the periphery of the insulating body, the shielding shell The top plate and the bottom plate and the left and right side plates connecting the top plate and the bottom plate are formed. The top plate is recessed toward the bottom plate to form a top surface concave portion. The bottom plate is recessed toward the top plate to form a bottom surface concave portion, so that the plug electrical connector is inserted. The thickness at both sides of the end is greater than the thickness at the middle.

Further, the extension length of the top recess and the bottom recess in the mating direction is not less than the insertion depth of the plug electrical connector when the plug electrical connector is mated with the docked receptacle electrical connector.

Further, the top surface concave portion and the bottom surface concave portion are disposed symmetrically in a center.

In order to solve the above technical problem, the present invention adopts the following technical solution three: a socket electric The connector includes an insulator, a socket terminal fixed in the insulator, and a metal casing surrounding the insulator, the metal casing including opposite upper and lower plates and left and right side walls for connecting the upper plate and the lower plate. The upper plate, the lower plate and the left and right side walls are collectively arranged to form a receiving cavity, and the insulator comprises a main body portion provided with a front end surface and a tongue plate extending forwardly along the front end surface of the main body portion, the upper plate and the lower plate The upper plate recess and the lower plate recess are respectively formed in the plate recessed into the receiving space, and the upper plate recess and the lower plate recess are disposed symmetrically in a center so that the thickness of both sides of the plug end of the socket electrical connector is greater than the intermediate thickness.

Further, the tongue of the insulator is located in the middle of the receiving cavity in the thickness direction of the tongue.

Further, the extension length of the upper plate recess and the lower plate recess in the mating direction is not less than the insertion depth of the plug electrical connector when the mated plug electrical connector is mated with the socket electrical connector.

Compared with the prior art, the present invention realizes the anti-slanting insertion function by providing mutually fitting recesses on the upper surface of the shielding case and the metal casing.

100, 100'‧‧‧ plug electrical connector

1‧‧‧Insulating body

10‧‧‧Terminal slot

101‧‧‧Upper terminal slot

102‧‧‧Lower row of terminal slots

11‧‧‧ base

111‧‧‧ gap

112‧‧‧fixed slot

12‧‧‧Interface

121‧‧‧ top wall

1211‧‧‧Upper recess

122‧‧‧ bottom wall

1221‧‧‧ recessed

123‧‧‧ left and right side walls

125‧‧‧Dock space

2‧‧‧Electrical terminals

201‧‧‧Fixed Department

202‧‧‧Contacts

203‧‧‧ tail

21‧‧‧Upper row of conductive terminals

22‧‧‧Bottom row of conductive terminals

3‧‧‧Holding parts

4‧‧‧Substrate

5‧‧‧Shaded housing

51‧‧‧ top board

511, 511'‧‧‧ top recess

52‧‧‧floor

521, 521'‧‧‧ bottom recess

53‧‧‧ left and right side panels

6‧‧‧Protection shell

200, 200'‧‧‧ socket electrical connector

7‧‧‧Insulator

71‧‧‧ Main body

72‧‧‧ tongue plate

8‧‧‧Socket terminal

81‧‧‧Contact end

9‧‧‧Metal casing

91‧‧‧ containment chamber

92‧‧‧Upper board

921, 921'‧‧‧ upper plate recess

93‧‧‧ Lower board

931, 931’‧‧‧ lower plate recess

94‧‧‧ Side wall

95‧‧‧holding holes

The first figure is a perspective view of the electrical connector of the first embodiment of the present invention before the socket electrical connector and the plug electrical connector are docked; the second figure is a perspective view of the electrical connector assembly shown in the first figure from another angle; 3 is an exploded perspective view of the electrical connector of the first embodiment of the present invention; the fourth diagram is an exploded view of the plug electrical connector shown in FIG. 3 from another angle; 5 is an exploded perspective view of the electrical connector of the first embodiment of the present invention; the sixth figure is the electrical connector of the present invention, and the electrical connector of the first embodiment is connected to the electrical connector of the socket. A cross-sectional view of the VI-VI line shown in the second figure, that is, a cross-sectional view of the plug electrical connector and the receptacle electrical connector after the mating direction of the plug electrical connector is in the thickness direction of the terminal; FIG. 8 is a perspective view showing a state in which the plug electrical connector of the first embodiment is tilted to the socket electrical connector; and FIG. 8 is a perspective view of another embodiment of the electrical connector assembly of the present invention.

Referring to the first to eighth figures, the electrical connector assembly of the present invention includes a plug electrical connector 100 and a receptacle electrical connector 200 that interfaces with the plug electrical connector 100. For the convenience of the following description, the mating end of the plug electrical connector 100 is defined as the front end of the plug electrical connector 100, and the other end thereof is defined as the rear end of the plug electrical connector 100. In addition, referring to the first figure and the second figure, the surface of the plug electrical connector 100 provided with the holding member 3 is defined as the front surface of the plug electrical connector 100, and the other surface is defined as the lower surface.

Referring to the first to fourth figures, the plug electrical connector 100 includes an insulative housing 1 , a plurality of conductive terminals 2 disposed in the insulative housing 1 , and a latching member 3 fixed on both sides of the insulative housing 1 . a substrate 4 fixed to the rear end of the insulative housing 1 and corresponding to the conductive terminal 2, a shielding case 5 covering the periphery of the insulative housing 1 , and a protective cover 6 covering the insulative housing 1 and the rear end of the shielding case 5 .

Referring to the first to fourth figures, the insulative housing 1 includes a base 11 and The front end of the base body 11 faces the insertion portion 12 which is formed to extend forward. Both the base body 11 and the insertion portion 12 are substantially in the shape of a square. A notch 111 for accommodating the substrate 4 is formed in a rectangular parallelepiped shape at a position intermediate the rear end surface of the base 11. A fixing groove 112 is defined in the rear end of the base 11 , and the fixing groove 112 is configured to fix the holding member 3 . The insertion portion 12 includes a top wall 121 and a bottom wall 122 disposed opposite to each other and left and right side walls 123 for connecting the two sides of the top wall 121 and the bottom wall 122. The fixing groove 112 extends forward into the insertion portion 12 and is disposed through the top wall 121 of the insertion portion 12. The top wall 121, the bottom wall 122, and the left and right side walls 123 of the plug portion 12 are collectively formed to form a plug space 125. The docking space 125 is used to interface with the socket electrical connector 200. A plurality of terminal slots 10 for receiving the conductive terminals 2 are respectively recessed on the inner wall surfaces of the top wall 121 and the bottom wall 122. The terminal slots 10 are divided into the top wall 121 of the plug portion 12 and communicate with the docking space. The 125 sets a plurality of upper row of terminal slots 101 and a plurality of lower row of terminal slots 102 on the bottom wall 122 and opposite to the upper row of terminal slots 101 in the up and down direction, the lower row of terminal slots 102 It is connected to the docking space 125.

Referring to the first to seventh figures, the outer surface of the top wall 121 is recessed inwardly to form an upper concave portion 1211, and the outer surface of the bottom wall 122 is recessed inwardly to form a lower concave portion 1221. In the present embodiment, the upper concave portion 1211 and the lower concave portion 1221 have the same concave shape and are symmetrically disposed in the vertical direction. The upper concave portion 1211 and the lower concave portion 1221 are respectively used for mating with the shielding case 5.

Referring to the first, third and fourth figures, the plurality of conductive terminals 2 have the same shape and are substantially elongated strips, and comprise a row of conductive rows fixed correspondingly in the upper row of terminal slots 101. The terminals 21 and one row are correspondingly fixed to the lower row of the conductive terminals 22 in the lower row of the terminal slots 102. The conductive terminal 2 includes an elongated strip-shaped fixing portion 201 , an elastic contact portion 202 extending along one end of the fixing portion 201 and being bent and formed along the fixing portion 201 The other end is extended to form a tail portion 203. The fixing portion 201 of the conductive terminal 2 is correspondingly fixed in the insulative housing 1. The tail portion 203 protrudes from the rear end of the insulative housing 1 into the notch 111, and the elastic contact portion 202 partially protrudes into the socket. The space 125 is for electrical contact with the docking receptacle electrical connector 200. The elastic contact portions 202 of the upper row of conductive terminals 21 and the elastic contact portions 202 of the lower row of conductive terminals 22 are disposed in one-to-one correspondence with the up and down direction in the insertion space 125.

Referring to the first, third, and sixth figures, the holding member 3 is formed by stamping a metal sheet, and is correspondingly fixed in the fixing slot 112 of the insulative housing 1 for fastening with the docking socket electrical connector 200. The specific structure and function of the latching member 3 are stable in the prior art, and will not be described in detail herein.

Referring to the third, fourth and sixth figures, the substrate 4 in the embodiment is preferably a printed circuit board, and of course any other plate that can print a conductive path. The substrate 4 is partially received in the notch 111 of the insulative housing 1 and located between the upper row of conductive terminals 21 and the lower row of conductive terminals 22, and the upper row of the conductive terminals 21 and the lower row of the conductive terminals 22 are The specific order is electrically connected one by one. As shown in the fourth figure, the upper row of conductive terminals 21 are sequentially numbered 211, 212, 213, 214, 215, and the lower row of conductive terminals 22 are sequentially numbered 221, 222, 223, 224, 225, this embodiment The connection order in which the upper row of the conductive terminals 21 and the lower row of the conductive terminals 22 are electrically connected one-to-one in a specific order is as follows: the terminals numbered 221 in the upper row of the conductive terminals 21 correspond to the lower row of the conductive terminals 22 The terminals numbered 225 are electrically connected together, and the terminals numbered 222 in the upper row of conductive terminals 21 are electrically connected to the terminals numbered 224 in the lower row of conductive terminals 22, and so on. In this embodiment, a conductive path is disposed on the substrate 4 to An electrical connection between the upper row of conductive terminals 21 and the lower row of conductive terminals 22 is achieved. Of course, in other embodiments, the connection may be performed by other means, for example, directly connecting the wires in the corresponding order described above.

Referring to the first to seventh figures, the shielding shell 5 is formed by stamping and bending a metal plate, at least covering the periphery of the plug portion 12 of the insulating body. The top plate 51 and the bottom plate 52, which are oppositely disposed, and the left and right side plates 53 for connecting the top plate 51 and the bottom plate 52 on both sides are included. In this embodiment, the middle portion of the top plate 51 is formed with a curved top concave portion 511 in the direction of the bottom plate 52, and the bottom portion of the bottom plate 52 is stamped and recessed toward the top plate 51 to form a curved bottom surface concave portion 521, and the top surface concave portion 511 is formed. It is disposed symmetrically with the bottom surface concave portion 521, that is, the top surface concave portion 511 and the bottom surface concave portion 521 have exactly the same shape. By providing the above-mentioned top surface concave portion 511 and the bottom surface concave portion 521, the distance between the top plate 51 and the bottom plate 52 at both sides of the shielding case 5 is greater than the distance between the top plate 51 and the bottom plate 52 at the middle portion, thereby making the entire plug electrical connector 100 The thickness of the sides of the plug interface is greater than the thickness of the middle. It should be noted that, in the embodiment, the top surface concave portion 511 and the bottom surface concave portion 521 have a large concave range. In other words, the top surface concave portion 511 and the bottom surface concave portion 521 are substantially adjacent to the top wall 121 and the bottom wall 122. The position on both sides is designed to make the anti-slanting effect better. In addition, the top recess 511 and the bottom recess 521 extend rearward from the plug end edge of the plug electrical connector 100 and extend not less than the plug electrical connector 100 when the plug electrical connector 100 is mated with the receptacle electrical connector 200. Actual insertion depth.

Referring to the first and second figures, after the shielding housing 5 is fixed on the outer periphery of the insulative housing 1, the upper concave portion 1211 and the lower concave portion 1221 of the insulative housing 1 respectively correspond to the top of the shielding housing 5. The surface concave portion 511 and the bottom surface concave portion 521 are closely fitted to ensure the stability between the shielding case 5 and the insulating body 1 while ensuring the entire plug electrical connector. The structural strength of 100.

Referring to the first and fifth figures, the socket electrical connector 200 that interfaces with the plug electrical connector 100 mainly includes an insulator 7, a socket terminal 8 fixed in the insulator 7, and a metal casing surrounding the insulator 7. 9. The insulator 7 includes a main body portion 71 and a tongue plate 72 extending forward along the front end of the main body portion 71. The socket terminal 8 is provided with a contact end 81 exposed on the surface of the tongue plate 72 for electrically connecting to the conductive terminal 2 of the plug electrical connector 100. In the present embodiment, the socket terminals 8 of the socket electrical connector 200 are only provided with one row, and are directly in contact with the upper row of the conductive terminals 21 or the lower row of the conductive terminals 22 of the plug electrical connector 100, in this embodiment. The socket terminals 8 are provided with five in total, which conforms to the transmission standard of the existing Micro USB 2.0.

Referring to the first and fifth figures, the metal casing 9 is formed with a receiving cavity 91, including an upper plate 92 and a lower plate 93, and two sides for connecting the upper plate 92 and the lower plate 93. The left and right side walls 94. The tongue plate 72 of the insulator 7 is located in the middle of the receiving cavity 91 in the up and down direction. The upper plate 92 and the lower plate 93 are respectively formed with an upper plate recess 921 and a lower plate recess 931, so that the thickness of both sides of the plug interface of the entire socket electrical connector 200 is greater than the intermediate thickness. The upper plate concave portion 921 and the lower plate concave portion 931 are respectively mated and mated with the top surface concave portion 511 and the bottom surface concave portion 521 of the plug electrical connector 100. In addition, the upper plate recess 921 and the lower plate recess 931 extend rearward from the plug end edge of the socket electrical connector 200 and extend not less than the plug electrical connector 100 when the plug electrical connector 100 is mated with the receptacle electrical connector 200. The depth of insertion.

A pair of latching holes 95 are defined in the upper plate 92 and the lower plate 93 of the metal casing 9. The latching holes 95 are correspondingly engaged with the latching members 3 of the plug electrical connector 100.

Please refer to the sixth figure. When the docking is performed, the plug electrical connector 100 is correspondingly inserted into the socket. In the receiving cavity 91 of the electrical connector 200, the tongue plate 72 of the socket electrical connector 200 is correspondingly received in the plugging space 125 of the plug electrical connector 100, through the socket terminal 8 and one of the plug electrical connectors 100 The conductive terminals 2 are in direct contact to implement the forward and reverse insertion function of the plug electrical connector 100.

Referring to the seventh figure, when the user mistakenly connects the plug electrical connector 100 obliquely to the receptacle electrical connector 200, since the receptacle electrical connector 200 is provided with the upper plate recess 921 and the lower plate recess 931, the plug is electrically connected. The plug end chamfer of the device 100 will be stopped by the upper plate recess 921 and the lower plate recess 931 so that the plug electrical connector 100 cannot be inserted. Thus, the anti-slanting insertion function of the plug electrical connector 100 can be realized, thereby ensuring that the tongue plate 72 and the plug electrical connector 100 of the socket electrical connector 200 are not damaged by impact scratches due to oblique insertion. In addition, in order to enable the plug electrical connector 100 of the present invention to realize the forward and reverse insertion, the concave shape of the top concave portion 511 and the bottom surface concave portion 521 are designed to be centrally symmetrical, and the concave shape of the upper plate concave portion 921 and the lower plate concave portion 931 is also Designed to be centrally symmetrical.

Referring to FIG. 8 , in another embodiment of the present invention, the only difference between the embodiment and the foregoing embodiment is that the top surface concave portion 511 ′, the bottom surface concave portion 521 ′, the upper plate concave portion 921 ′, and the lower plate concave portion. The (not labeled) concave cross-sectional shape is an isosceles trapezoid. For the same reason, it can also be designed as a rectangle or a triangle.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto. Equivalent modifications or variations made by those skilled in the art in the spirit of the present invention are still included in the scope of the appended claims.

100‧‧‧ plug electrical connector

200‧‧‧Socket electrical connector

3‧‧‧Holding parts

511‧‧‧Top recess

95‧‧‧holding holes

921‧‧‧Upper plate recess

Claims (8)

An electrical connector assembly includes a plug electrical connector and a receptacle electrical connector that interfaces with the plug electrical connector, the plug electrical connector including an insulative housing, a plurality of conductive terminals disposed in the insulative housing, and a covering of the insulative housing The shielding body of the outer casing comprises: a top wall and a bottom wall disposed opposite to each other; and left and right side walls connecting the two sides of the top wall and the bottom wall, wherein the top wall, the bottom wall and the left and right side walls are jointly arranged to form a docking space The shielding housing includes a top plate and a bottom plate disposed opposite to each other, and left and right side plates connecting the top plate and the bottom plate. The socket electrical connector mainly comprises an insulator, a socket terminal fixed in the insulator body, and a metal casing surrounding the insulating body. The metal casing comprises a pair of upper and lower plates and a left and right side wall for connecting the upper plate and the lower plate, wherein the conductive terminal comprises a conductive terminal disposed on the top wall and arranged The conductive terminals are arranged on the bottom wall, and the upper row of conductive terminals and the lower row of conductive terminals are in one-to-one correspondence in the up and down direction, and the top plate is recessed toward the bottom plate. a concave portion, wherein the bottom plate is recessed toward the top plate to form a bottom surface concave portion, and the upper plate and the lower plate are respectively recessed to form an upper plate concave portion and a lower plate concave portion, wherein the top surface concave portion and the bottom surface concave portion are symmetrically disposed at a center The upper plate recessed portion and the lower plate recessed portion are disposed symmetrically with each other. When the plug electrical connector is mated with the socket electrical connector, the upper plate recessed portion and the lower plate recessed portion are respectively mated with the top surface concave portion and the bottom surface concave portion. The electrical connector assembly of claim 1, wherein the top surface recess and the bottom surface recess extend rearward from a plug end edge of the plug electrical connector and have a length that is not less than an electrical connection between the plug electrical connector and the socket. The insertion depth of the plug electrical connector when the device is docked, the upper plate recess and the lower plate recess extend rearward from the plug end edge of the socket electrical connector and extend not less than the plug when the plug electrical connector is mated with the receptacle electrical connector The insertion depth of the electrical connector. The electrical connector assembly of claim 1, wherein the plug electrical connector is inserted The thickness of the two ends of the socket is greater than the thickness of the middle portion, and the thickness of the two sides of the socket of the socket electrical connector is greater than the thickness of the middle portion. The electrical connector assembly of claim 1 or 3, wherein the insulator of the socket electrical connector is provided with a tongue plate correspondingly received in the plug space, when the plug electrical connector is positive When the socket electrical connector is docked, the lower conductive terminal of the plug electrical connector is directly electrically connected to the socket terminal on the docking receptacle electrical connector; when the plug electrical connector is reversely connected to the socket When the device is docked, the conductive terminals on the upper side of the plug electrical connector are directly electrically connected to the socket terminals on the electrical connector of the docking socket. A plug electrical connector includes an insulating body, a plurality of conductive terminals disposed in the insulating body, and a shielding shell covering the periphery of the insulating body, the insulating body including oppositely disposed top and bottom walls and a connecting top wall and The left and right side walls on both sides of the bottom wall, the top wall, the bottom wall and the left and right side walls are collectively arranged to form a plugging space, and the shielding shell comprises a top plate and a bottom plate which are oppositely disposed, and left and right side plates connecting the top plate and the bottom plate, and the features thereof The conductive terminal includes a row of conductive terminals disposed on the top wall and a lower row of conductive terminals disposed on the bottom wall, wherein the upper row of conductive terminals and the lower row of conductive terminals are in one-to-one correspondence in the up and down direction. The top plate is recessed toward the bottom plate to form a top surface recessed portion, and the bottom plate is recessed toward the top plate direction to form a bottom surface concave portion, and the top surface concave portion and the bottom surface concave portion are disposed symmetrically in a center so that the plug electrical connectors are at both sides of the plug end The thickness is greater than the thickness in the middle. The plug electrical connector of claim 5, wherein the extension of the top recess and the bottom recess in the mating direction is not less than the plug electrical connector when the plug electrical connector is mated with the docked receptacle electrical connector. The depth of insertion. A socket electrical connector includes an insulator, a socket terminal fixed in the insulator body, and a metal casing surrounding the insulator body, the metal casing including opposite upper and lower plates and connecting the upper plate and the lower plate a side wall, the upper plate, the lower plate and the left and right side walls are collectively formed to form a receiving cavity, and the insulator includes a main body portion having a front end surface and a front end surface along the main body portion a tongue plate formed by the front extension, wherein the upper plate and the lower plate are respectively recessed into the receiving space to form an upper plate concave portion and a lower plate concave portion, wherein the upper plate concave portion and the lower plate concave portion are symmetrically disposed at a center, so that the socket The thickness of both sides of the plug end of the electrical connector is greater than the thickness of the middle, and the tongue is located in the middle of the receiving cavity in the thickness direction of the tongue. The socket electrical connector of claim 7, wherein the upper plate recess and the lower plate recess have an extension length in the butting direction that is not less than a plug electrical connection when the mated plug electrical connector is mated with the socket electrical connector. The insertion depth of the device.