TWI589071B - Electrical connector assembly - Google Patents

Description

Electrical connector assembly

The present invention is directed to an electrical connector assembly in which the plug connector can be inserted into the receptacle connector in both forward and reverse directions.

U.S. Patent Application Publication No. 20130095702A1 discloses a two-way plug connector having a plug connector having opposing upper and lower surfaces, the plurality of conductive terminals being disposed on the upper and lower surfaces. The conductive terminals exposed to the upper and lower surfaces are symmetrically spaced from each other, and the shape of the 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 program. 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.

Therefore, it is indeed necessary to provide an electrical connector combination having an improved structure to overcome the above drawbacks.

The object of the present invention is to provide an electrical connector assembly with a plug connector Can be inserted into the socket connector in both directions.

In order to solve the above technical problem, the present invention provides an electrical connector assembly including a socket connector and a plug connector that are mated to each other, the plug connector including a first insulative housing and two rows of first terminals, the first insulative housing There is a docking slot, the two rows of first terminals are arranged on two sides of the docking slot, the socket connector comprises a second insulative housing and two rows of second terminals, and the second insulative housing comprises a forwardly extending butt tongue. The docking tongue has two opposite surfaces, and the two rows of second terminals include contacts respectively arranged on two opposite surfaces of the mating tongue, and the plug connector can be inserted into the socket in both directions. a connector, the shielding plate is provided with a shielding plate, the side edge of the shielding plate is provided with a fastening notch, the plug connector is further provided with a fastening member, and the fastening component comprises a pair of lateral sides respectively located on the opposite sides of the docking groove The side arm has a hook portion that is fastened in the fastening notch when the two connectors are butted.

Compared with the prior art, the invention has the following effects: the fastening notch of the shielding plate cooperates with the fastening component, and can achieve better shielding, grounding and stable holding.

900, 401‧‧‧ circuit board

400‧‧‧Socket connector

101‧‧‧ docking end

43‧‧‧Second shielding shell

102‧‧‧ capsule shape

431‧‧‧Bump structure

103‧‧‧ docking slot

500‧‧‧Socket connector

11‧‧‧Internal circuit board

53‧‧‧Second shielded enclosure

111, 112‧‧‧ conductive gasket

531‧‧‧Flexible beam structure

12‧‧‧First Insulation Body

600‧‧‧ socket connector

121‧‧‧ side wall

61‧‧‧ pins

122‧‧‧Terminal slot

63‧‧‧Second shielding shell

123‧‧‧ Guide slot

631‧‧‧Fixed tabs

13‧‧‧First terminal

64‧‧‧ Back cover

131‧‧‧Contacts

641‧‧‧Guelding Department

132‧‧‧ pins

642‧‧‧Sturdy hole

14, 14'‧‧‧ Holders

643‧‧‧Installation feet

141, 141’‧‧‧ side arm

644‧‧ vacant department

142‧‧‧ beams

73‧‧‧Second shielding shell

143‧‧‧Hook

731‧‧‧Sturdy hole

144‧‧‧ side edge

74‧‧‧ Back cover

15‧‧‧First shielding shell

741‧‧‧Fixed tabs

151‧‧‧Locking Department

800‧‧‧ socket connector

16a, 16b‧‧‧ third shielding shell

81‧‧‧Second insulation body

162‧‧‧ Front edge

82, 83‧‧‧ second terminal

163‧‧‧Lock groove

821, 822, 823‧‧‧ feet

17‧‧‧ Cable

824, 825‧‧‧ feet

171‧‧‧core

831, 832, 833‧‧‧ feet

18‧‧‧ Injection molded case

834, 825‧‧‧ feet

200‧‧‧ socket connector

84‧‧‧shading board

21‧‧‧Connecting tongue

841‧‧‧ feet

213‧‧ ‧ gap

842‧‧‧Elastic film

22‧‧‧second terminal

85‧‧‧Second shielded enclosure

221‧‧‧Contacts

87‧‧‧Terminal positioning block

23‧‧‧Second shielding shell

75a‧‧‧second shielded enclosure

24‧‧‧shading board

751‧‧‧ front foot

241‧‧‧ front edge

752‧‧‧After the feet

242‧‧‧ side edge

75b‧‧‧second shielded enclosure

243‧‧‧holding gap

754‧‧‧Back cover

300‧‧‧Socket connector

7541‧‧‧ pins

33‧‧‧Second shielding shell

75c‧‧‧second shielded enclosure

301‧‧‧ docking chamber

755‧‧‧Back cover

31‧‧‧Connecting tongue

75d, 75e, 75f‧‧‧ back cover

332‧‧‧ openings

7561‧‧‧ ears

36‧‧‧ Grounding plate

7562, 7563‧‧‧ feet

361‧‧‧Flexible arm

1 is a front view of a plug connector of a first embodiment of the present invention; a second view is an exploded perspective view of the first plug connector; and a third view is a partially exploded view of the first plug connector; 4 is a perspective view of the first and third shielding shells of the first plug connector; the fifth drawing is a cross-sectional view of the plug connector of the first figure; and the sixth figure is the socket connector of the plug connector of the first figure; a perspective view in which the second shielding shell of the socket connector is removed; 7 is a cross-sectional view of the plug connector of FIG. 1 after docking with the socket connector of FIG. 6; and FIG. 8 is an exploded perspective view of the plug connector of the second embodiment of the present invention, wherein the pair of side arms are independent of each other; 9 is a perspective view of a socket connector mounted on a circuit board according to a third embodiment of the present invention; FIG. 11 is an exploded perspective view of the ninth diagram; and FIG. 11 is a ninth diagram of the socket connector along a dotted line XI-XI Figure 12 is a perspective view of a socket connector mounted on a circuit board according to a fourth embodiment of the present invention; and a thirteenth view is a cross-sectional view of the socket connector of the twelfth embodiment taken along a broken line XIII-XIII; A perspective view of a socket connector of a fifth embodiment of the invention mounted on a circuit board.

Figure 15 is a cross-sectional view of the socket connector of Figure 14 taken along the dashed line XV-XV; Figure 16 is a perspective view of the electrical connector assembly of the sixth embodiment of the present invention; and Figure 17 is a sixteenth diagram of the socket connection FIG. 18 is a perspective view of a second shielding case of a socket connector according to a seventh embodiment of the present invention; FIG. 19 is a perspective view of another angle of the eighteenth embodiment; A partially exploded perspective view of the receptacle connector of the eighth embodiment; 21 is a cross-sectional view of the twentieth diagram showing the terminal structure; the twenty-second diagram is a cross-sectional view of another terminal embodiment of the twentieth diagram; and the twenty-third diagram is the twentieth diagram. A cross-sectional view of a terminal implementation state; a twenty-fourth view is a cross-sectional view of another terminal implementation state of the twentieth embodiment; and a twenty-fifth view is a cross-sectional view of another terminal implementation state of the twentieth embodiment; The twenty-sixth to thirty-first figures show the second shielded outer casing structure in various forms.

The first to eighth figures show an electrical connector assembly of a first embodiment of the present invention, the electrical connector assembly including a plug connector and a receptacle connector 200. Referring to the first to fifth figures, the plug connector has a butt end 101 at the front end thereof, and the butt end 101 has a capsule shape 102 (from the rear to the rear, the shape of the butt end 101 is composed of two straight sides and two The short arc edges are connected to each other) and a rectangular shaped docking groove 103 which can be inserted into the socket connector 200 mounted on the circuit board 900 in both forward and reverse directions. The plug connector includes two inner circuit boards (or sub-cards) 11 having front and rear conductive pads 111, 112 on opposite surfaces, a first insulative housing 12 on the front side of the inner circuit board 11, and a first insulative housing 12 attached thereto. The outer first shielding shell 15 and the first shielding shell 15 are seamless metal tubes. The first insulative housing 12 has a mating slot 103 formed by two opposite sidewalls 121. The first slots 13 of the two sidewalls 121 are respectively provided with elastic first terminals 13, and each of the first terminals 13 extends forwardly into the docking slot 103. The contact portion 131 and the first insulating body 12 extending rearward are connected to the pins 132 of the front conductive pad 111. The cables 17 extend rearward from the internal circuit board 11, each cable 17 having a plurality of core wires 171 that are respectively connected to the inner circuit board rear end conductive pads 112. A U-shaped holding member 14 is disposed in the guiding groove 123, and the U-shaped holding member 14 is made of metal The plate surface is directly stamped and has the same thickness, and includes a pair of side arms 141 connected by the beam 142. The directly punched fasteners 14 are relatively bent to be relatively better in securing elasticity. Resilience, that is, it is not easy to lose flexibility. The front end of each side arm 141 has a hook portion 143 which extends forward and faces the docking groove 103 in the lateral direction. As shown in the fifth figure, the beam 142 is located between the pins 132 of the two rows of first terminals 13. The holding member 14 is electrically contacted with the first shielding shell 15 and the outer edge of the side edge 144 abuts against the inner surface of the first shielding shell 15 for achieving a permanent grounding effect. The internal circuit board 11 is located at the rear end of the first insulative housing 12, and a cable 17 is connected to the rear end of the internal circuit board 11. The lines extend rearward from the internal circuit board 11, and the core wires 171 in the cable 17 are electrically connected one by one. Shim 112. The first shielding shell 15 is closely attached to the outer side of the first insulative housing 12, and the pair of third shielding shells 16a, 16b surround the rear end portion of the first insulative housing 12, the inner circuit board 11 and the front end portion of the cable 17. . As shown in the third to fourth figures, the first shielding casing 15 (i.e., the front shielding casing) is independent but connected to the third shielding casings 16a, 16b (i.e., the rear shielding casing). The capsule body portion of the first shielding shell 15 extends rearwardly to a locking portion 151. The locking portion 151 has two outwardly projecting hook portions, and the third shielding shells 16a, 16b are provided with a front edge portion 162. The edge portion 162 is provided with a longitudinal locking groove 163. The front edge portion 162 extends obliquely toward the pin 132 of the first terminal 13. Thus, the locking portion 151 is inserted into the locking groove 163 and is fastened on the inner wall of the locking groove. . The injection molded case 18 is injection molded on the third shield case 16, the internal circuit board 11, and the cable 17, thereby forming the entire plug connector.

It should be noted that the present invention defines the direction in which the two connectors are inserted and matched in the front-rear direction. In fact, the electrical connector can be in any form of placement or installation, such as horizontal setting, vertical setting, or tilting. Various forms, such as settings, are described here as an example in which the socket connector 200 is horizontally disposed. Among them, the first, third and the following will describe the second, only to distinguish the different component names Without any prior and order, it is stated here first.

The plug connector is inserted into a corresponding receptacle connector 200 mounted on the circuit board 900, as shown in the sixth to seventh figures. The socket connector 200 includes a forwardly extending butt tongue 21 and a plurality of non-elastic second terminals 22, the second terminal 22 including a contact portion 221 exposed on two opposite surfaces of the mating tongue 21 and a soldered connection on the circuit board foot. A sac-shaped second shielding shell 23 surrounds the butt tongue 21 to define a docking cavity, the docking tongue 21 extends forwardly into the docking cavity, and the metal second shielding shell 15 further includes a plurality of connectors mounted on the circuit board. Feet (not shown).

A shielding plate 24 made of a metal plate, or a grounding plate portion, is disposed in the abutting tongue plate 21 to enhance the strength of the abutting tongue plate 21. The front edge 241 of the shielding plate 24 protrudes from the corresponding tongue plate 21 The front edge is used to prevent damage to the butt tongue by improper insertion of the plug connector or oblique insertion of the plug connector. The two side edges 242 of the shielding plate 24 are provided with a fastening notch 243 for snap-fitting with the hook portions 143 of the plug connector while completing the grounding paths of each other. It should be noted that, in this embodiment, each side edge of the butt tongue plate 21 is provided with a notch 213, and the fastening notch 243 of the shielding plate 24 is aligned with the notch 213 in the up and down direction, and is shielded in the lateral direction. The side edge 242 of the plate 24 protrudes from the notch 213 of the abutting tongue plate, and in particular, the fastening notch 243 protrudes from the corresponding notch 213, so that even if the plug connector is improperly inserted obliquely, it is still better to ensure that the two connectors are better. s contact. The fastening notch 242 of the shielding plate 24 is exposed in the notch 213 of the mating tongue. This ensures that the hook portion 143 of the plug connector can mechanically and electrically engage the notch 243 to complete the grounding path. It can be understood that when the plug connector and the socket connector are coupled to each other, the latching notch 243 plays a main latching function, and the notch 213 provides an auxiliary latching function, especially the hook portion 143. Deviating from the gap 213.

Figure 8 is a plug connector of a second embodiment of the present invention showing another form of latching member 14' including a pair of mutually independent side arms 141', the pair of side arms 141 'There is fixed between the first insulative housing 12 and the first shielding housing 15 (the tubular body portion thereof).

The ninth to sixteenth embodiments are the third to fifth embodiments of the present invention, and the second shield housing having the socket connector 300 in a different state is mainly shown as compared with the first embodiment. The main structure is roughly the same, and the detailed structure is modified according to different functions. Referring to the ninth to eleventh drawings, the socket connector 300 is mounted on a circuit board, and the socket connector 300 includes a second insulative housing, a second shielding housing 33 surrounding the second insulative housing, and the second shielding housing 33 encloses the second The insulating body forms an abutting cavity 301, and the second insulating body has a butt tongue 31 extending forward into the docking cavity. The second shielding shell 33 is provided with a plurality of openings 332 and a pair of grounding plates 36 which are thinner and have a certain elasticity than the second shielding shells 33. The grounding plate 36 is directly welded to the second shielding casing, and is provided with a plurality of elastic arms 361 aligned with the opening 332. The elastic arms 361 enter the mating cavity 301 through the opening for contacting the first shielding casing 15 of the plug connector. It can be understood that, in order to reduce the leakage flux to enhance the mask effect, the grounding plate 36 on the upper side may be a folded-back structure, the elastic arm 361 may be punched out from the folded lower sheet, and the folded upper sheet completely covers the second shielding shell. 33 without any opening structure.

Referring to the twelfth to thirteenth drawings, the second shielding case 43 of the receptacle connector 400 has a bump structure 431 protruding toward the mating cavity, and the bump structure 431 can be inserted into the plug connector of the receptacle connector 400. A shielded outer casing 15 is in contact. Referring to the fourteenth to fifteenth drawings, the second shielding shell 53 of the socket connector 500 is provided with an elastic beam structure 531 protruding into the docking chamber, and both ends of the elastic beam structure 531 are integrally connected to the second covering The shield case 53 is in contact with the first shield case 15 of the plug connector of the receptacle connector 500.

The sixth embodiment to the seventeenth embodiment show the sixth embodiment. The second shielding shell 63 of the socket connector 600 includes a rear cover 64. The rear cover 64 is provided with a fastening portion 641, and the fastening portion 641 is internally provided with a solid portion. The fastening hole 642 and the side wall of the second shielding shell 63 (ie, the side wall of the main body portion) are provided with fastening tabs 631. The rear cover 64 includes a pair of forwardly extending mounting feet 643. In this embodiment, the rear cover 64 tightly covers the rear end of the second insulative housing, which can prevent the second insulative housing from being improperly retracted. Especially when the plug connector is inserted, the plug connector applies a second insulating body to the second insulative housing. The stronger force, while the retreating force can be transferred to the circuit board 900 by the mounting feet 643. On the other hand, the rear edge of the bottom wall of the capsule portion of the second shielding shell 63 is pressed against the front end surface of the second insulative housing, and the rear cover is pressed against the rear end surface of the second insulative housing. Thus, the second shielding shell 63 and the rear The cooperation of the cover 64 can block the second insulating body from moving forward, thus achieving stable holding of the second insulating body and the second shielding shell. In the present embodiment, a vacant portion 644 is formed between the two mounting legs 643 of the rear cover to allow the horizontal pins 61 of the second terminal to pass therethrough. Of course, in order to improve the shielding effect, the pin 61 may be a through-hole soldering foot state, so that the back cover 64 can completely cover the rear end of the second insulating body without the above-mentioned vacant portion. The eighteenth through nineteenth embodiments show a seventh embodiment, which is similar to the seventeenth one. The main difference is that the second shielding case 73 includes a fastening hole 731, and the rear cover 74 is provided with a fastening tab 741. The fastening tab 741 is fastened in the fastening hole 731 to stably fix the rear cover on the side wall of the second shielding shell 73.

The twenty-fifth to twenty-fifth drawings show the socket connector 800 completely mounted on the upper surface of the circuit board 401, that is, the board-type socket connector, and the shielding plate provided in the second insulative housing 81 has direct contact with the second shielding housing. 85 elastic piece 842, this socket is connected The structure of the device is similar to the socket connector 400 of the second embodiment. The terminal structure may be various embodiments of the twenty-first to twenty-fifth drawings. The twenty-first figure shows that the socket connector is injection molded. The upper terminal second terminal 82 of the upper terminal module has a surface soldering type pin 821, and the lower row second terminal 83 of the lower terminal module is injection molded. The pin 831 has a shielding plate 84 between the two rows of second terminals. The twenty-second figure shows that the upper and lower rows of the second terminals have surface soldering type pins 822, 832, and the pins are oriented in the same direction. The twenty-third figure shows that the upper and lower rows of the second terminals have surface-welded pins 823, 833 with the pins facing in opposite directions. The twenty-fourth figure shows that the second terminals of the upper and lower rows have perforated pins 824, 834, and the second terminals are directly inserted into the second insulative housing 81, instead of being injection molded in the terminal module. Assembled together, of course, a row of second terminal sets can be incorporated into the second insulative housing, and another row of second terminals can be injection molded into the second insulative housing. The terminal positioning block 87 is mounted in the second insulating body for aligning the pins 824, 834 of the terminal and the pins 841 of the shielding plate. The twenty-fifth figure shows that the pin 835 of the second terminal of the lower row is a bent structure for increasing the length so that it has the same length as the pin 825 of the second terminal of the upper row for compensating for the signal bias. shift.

The twenty-sixth to thirty-firstth views show the different states of the second shielding case. The twenty-sixth drawing shows that the second shielding case 75a has a front pin 751 bent rearward at a front edge thereof and a rear leg 752 bent forward at a rear edge thereof, and the front and rear pins are used for mounting The circuit board, the structure is smaller than the pin formed by the direct tearing of the shielding shell (as shown in the twentieth figure), because the sealing property is better, the shielding effect can be greatly improved. The twenty-seventh figure shows that the second shielding shell 75b has a rear cover 754 which is connected to the rear edge of the side wall of the second shielding shell 75b, compared to the structure in which the back cover is connected to the top wall of the second shielding shell, The stamping process of the pin 7541 is relatively easier. The twenty-eighth shows that the second shielding shell 75c has a two-piece structure, and the two-piece structure is divided into two parts. Do not connect to both side walls of the second shielding case 75c. The twenty-ninth to thirty-first figures show that the rear cover 75d, 75e, 75f has two ears 7561 structure connected to the two side walls of the second shielding case, and the rear cover has the rear end and the side of the second shielding case. Pins 7562, 7563.

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.

101‧‧‧ docking end

102‧‧‧ capsule shape

103‧‧‧ docking slot

131‧‧‧Contacts

143‧‧‧Hook

18‧‧‧ Injection molded case

Claims (28)

An electrical connector assembly, comprising: a plug connector, comprising: a first insulative housing having a mating slot; and two rows of first terminals arranged on opposite sides of the mating slot; the socket connector being connected to the plug The connectors are butted to each other, including: a second insulative housing comprising a forwardly extending abutting tongue, the butt tongue having two opposite surfaces; and two rows of second terminals including respectively arranged on the butt tongue a contact portion of the two opposite surfaces; wherein the plug connector can be inserted into the socket connector in both directions, the shielding plate is provided with a shielding plate, and the side edge of the shielding plate is provided with a buckle The notch, the plug connector is further provided with a holding member, the holding member comprises a pair of side arms respectively located on two lateral sides of the mating groove, and the side arm has the buckled at the two connectors when the two connectors are docked The hook inside the gap. The electrical connector assembly of claim 1, wherein the first insulating body of the plug connector is attached with a first shielding outer casing, and the side arm of the fastening member electrically contacts the first shielding outer casing. . The electrical connector assembly of claim 2, wherein the side arms of the fastening member are provided with an outer edge that abuts against an inner surface of the first shielding housing. The electrical connector assembly of claim 1, wherein the pair of side arms of the fastening member are integrally connected by a beam, the first terminal includes a contact portion extending into the docking groove and extending the first insulation a pin of the body, the cross beam being located between the pins of the two rows of first terminals. The electrical connector assembly of claim 1, wherein the fastening member is formed by direct stamping of a metal plate such that the fastening members have the same thickness. The electrical connector assembly of claim 1, wherein the first insulating body of the plug connector is attached with a first shielding outer casing, and the first shielding outer casing is a seamless metal tubular structure. The electrical connector assembly of claim 6, wherein the plug connector is provided with an internal circuit board at a rear end of the first insulative housing, and the first terminal is connected to a line gasket disposed at a front end of the internal circuit board. A cable is connected to the rear end of the inner circuit board, and the plug connector further includes a pair of third shielding shells surrounding the front end portion of the first insulative housing, the inner circuit board, and the front end portion of the cable. The electrical connector assembly of claim 7, wherein the first and third shielding shells are locked together. The electrical connector assembly of claim 1, wherein the socket connector is provided with a second shielding shell, and the second shielding shell surrounds the outside of the butt tongue to form a docking chamber therebetween. The second shielding shell is provided with a back cover covering the rear end of the second insulating body. The electrical connector assembly of claim 9, wherein the back cover is provided with a downwardly extending pin. The electrical connector assembly of claim 9, wherein the back cover is a two-piece structure, and the two-piece structure is respectively connected to both sides of the second shielding case. The electrical connector assembly of claim 9, wherein the rear cover is provided with a fastening portion, the fastening portion is provided with a fastening hole, and the second shielding housing is disposed in the fastening hole. Fastening tabs. The electrical connector assembly of claim 9, wherein the second shielding shell comprises a fastening hole, the rear cover is provided with a fastening tab, and the fastening tab is fastened in the fastening hole Inside. The electrical connector assembly of any one of claims 1 to 8, wherein One of the two rows of second terminals has a surface soldering type pin, and the other row of second terminals has a piercing soldering type pin; the pins of the two rows of second terminals face in the same direction or in opposite directions. The electrical connector assembly of claim 14, wherein the second terminal of the two rows of the second terminals is a bent structure for increasing the length. The electrical connector assembly of claim 9, wherein the second shielding housing is provided with a plurality of openings and a pair of grounding plates, the pair of grounding plates being directly soldered to the second shielding housing and provided with a plurality of elasticities aligned with the opening An arm that enters the docking chamber through the opening. The electrical connector assembly of claim 9, wherein the second shielding housing has a bump structure that projects toward the docking cavity. The electrical connector assembly of claim 9, wherein the second shielding shell is provided with an elastic beam structure protruding into the mating cavity, and both ends of the elastic beam structure are integrally connected to the second shielding shell. A plug connector includes a first insulative housing and a mating slot; two rows of first terminals are arranged on two sides of the mating slot; and a latching member, the latching member includes a pair of slots respectively located in the mating slot The side arms on both sides of the lateral direction, the front end of the side arm is provided with a hook portion protruding into the mating groove. The plug connector of claim 19, wherein the pair of side arms are integrally joined together by a beam. The plug connector of claim 19, wherein the outer side of the first insulative housing is attached with a first shielding outer casing, and the side arm of the fastening member electrically contacts the first shielding outer casing. The plug connector of claim 21, wherein the side arms of the latching member are provided with an outer edge that abuts against an inner surface of the first shielding shell. The plug connector of claim 19, wherein the latching member is straight from a metal plate Formed by stamping, such that the fasteners have the same thickness, and the two side arms are disposed independently of each other. A socket connector that interfaces with a plug connector according to any one of claims 19 to 23, wherein the socket connector includes a second insulative housing and two rows of second terminals, The second insulative housing includes a forwardly extending abutment tongue having two opposing surfaces, the two rows of second terminals including contacts respectively disposed on the two opposing surfaces of the mating tongue, A shielding plate is disposed in the butt tongue, and a side edge of the shielding plate is provided with a fastening notch that is matched with the hook portion of the fastening member. The socket connector of claim 24, wherein the socket connector is provided with a second shielding shell, and the second shielding shell surrounds the outside of the butt tongue to form a docking chamber therebetween, The second shielding shell is provided with a back cover covering the rear end of the second insulating body. The receptacle connector of claim 25, wherein the back cover is provided with a downwardly extending pin. The socket connector of claim 25, wherein the rear cover is provided with a fastening portion, the fastening portion is provided with a fastening hole, and the second shielding housing is provided with a fastening for fastening the fastening hole. Buckle tabs. The socket connector of claim 25, wherein the second shielding shell comprises a fastening hole, the rear cover is provided with a fastening tab, and the fastening tab is fastened in the fastening hole .