TW201914123A - Terminal module and electrical connector thereof wherein the electrical connector is composed of a housing and the terminal module disposed in the housing - Google Patents

Abstract

A terminal module and an electrical connector thereof are disclosed. The terminal module comprises a first terminal module having a first body, a first terminal group and a first receiving slot; a second terminal module having a second body and a second terminal group; a third terminal module having a third body and a third terminal group; and a fourth terminal module having a fourth body, a fourth terminal group and a second receiving slot. The first body, the second body, the third body and the fourth body are coupled to the first terminal group, the second terminal group, the third terminal group and the fourth terminal group, respectively, by injection molding. The fourth terminal group corresponds to the first terminal group. The second terminal group corresponds to the third terminal group, and the second terminal group and the third terminal group are located behind the first terminal group and the fourth terminal group. At least one side of one of the first terminal group, the second terminal group, the third terminal group and the fourth terminal group is arranged with a grounding terminal, a first signal terminal, and a second signal terminal in an order from an outer periphery of the terminal group. An electrical connector is composed of a housing and a terminal module disposed in the housing.

Description

Terminal module and its electrical connector

The present invention relates to a terminal module and an electrical connector thereof, and more particularly to a terminal module for use with an electronic connector and an electrical connector thereof.

Generally, an electrical connector for inserting an electronic plug is generally composed of a casing, four sets of terminal sets, and at least four brackets, and the terminal groups are respectively arranged on the brackets up and down, and then A bracket provided with the terminal set is sequentially disposed in the housing to complete the electrical connector.

In the above-mentioned electrical connector, since the electrical connector is in compliance with related electronic products, the volume is designed to be light, thin, short, and small, so that the terminals of the terminal groups are relatively small, when each After the terminals of the terminal group are installed in the bracket, the brackets with the terminal groups are sequentially placed into the housing one by one, so that the terminal groups interfere with each other during the assembly process, and the terminals of the terminal groups are bent or even Damage occurs, which in turn affects the production yield of the electrical connector and subsequent use.

Therefore, how to invent a terminal module and an electrical connector thereof for the purpose of quick combination, easy fabrication, and improved production yield, thereby effectively improving the lack of conventional use, will be actively disclosed by the present invention.

In view of the shortcomings of the above-mentioned prior art, the inventors felt that they were not perfected, exhausted their mental research and overcome, and developed a terminal module and its electrical connector, in order to achieve rapid assembly, easy production and improvement. The purpose of making yield.

To achieve the above and other objects, the present invention provides a terminal module and an electrical connector thereof. The terminal module includes: a first terminal module, a second terminal module, and a third terminal module. And a fourth terminal module; the first terminal module includes a first seat body and a first terminal set, the first seat system is combined with the first terminal set by injection molding, and the first seat block a plurality of first receiving slots are formed on the top of the body; the second terminal module includes a second base body and a second terminal set, and the second seat system is combined with the second terminal set by injection molding. The contact end of the second terminal set is received in the first receiving slot; the third terminal module includes a third base and a third terminal set, and the third base system is formed by injection molding. The third terminal set is coupled to the second terminal set; the fourth terminal module includes a fourth base body and a fourth terminal set, and the fourth seat system is formed by injection molding. The method is combined with the fourth terminal set, and the bottom of the fourth seat is erected And accommodating a plurality of second accommodating slots of the contact end of the third terminal group, the fourth terminal group corresponding to the first terminal group, wherein the second terminal group and the third terminal group are located at the first terminal And a rear end of the fourth terminal group; wherein at least one side of one of the first terminal group, the second terminal group, the third terminal group, and the fourth terminal group is externally arranged with a ground terminal, Signal terminal and signal terminal.

In the above terminal module, the first side of the first body is respectively provided with a first abutting portion, and the first abutting portion is coupled to the bottom of the second seat.

In the above terminal module, the first terminal group includes a plurality of first terminals, and the first terminals have a body portion, and the two ends of the body portion respectively have a contact end and a connection end, A system encloses the body portion of the first terminals.

In the above terminal module, the first terminal module further includes a first grounding member, the first grounding member is coupled to the first base member, and the end of the first grounding member is provided with a plurality of extensions. The extensions are in contact with the ground terminal of the first terminal set.

In the above terminal module, a second abutting portion is respectively disposed on both sides of the bottom portion of the second base body, the second abutting portion is coupled to the top of the first seat body, and the top portion of the second seat body is two The side systems are respectively provided with a second set of joints, and the second set of joints is coupled to the bottom of the third seat.

In the above terminal module, the second terminal group includes a plurality of second terminals, and the second terminals have a body portion, and the two ends of the body portion respectively have the contact end and a connecting end, The two system covers the body portion of the second terminals.

In the above terminal module, the second seat system has a hollow region, and the body portions of the second terminals are completely exposed in the hollow region.

In the above terminal module, a third abutting portion is respectively disposed on both sides of the bottom portion of the third body, the third butting portion is coupled to the top of the second seat body, and the top of the third seat body is two The side systems are respectively provided with a third assembly portion, and the third assembly portion is coupled to the bottom of the fourth base body.

In the above terminal module, the third terminal group includes a plurality of third terminals, and the third terminals have a body portion, and the two ends of the body portion respectively have the contact end and a connecting end, The three-seat system covers the body portions of the third terminals.

In the above terminal module, the third seat system has a hollow region, and the body portions of the third terminals are completely exposed in the hollow region.

In the above terminal module, a fourth abutting portion is respectively disposed on both sides of the bottom portion of the fourth base body, and the fourth abutting portion is coupled to the top of the third seat body.

In the above terminal module, the fourth terminal group includes a plurality of fourth terminals, and the fourth terminals have a body portion, and the two ends of the body portion respectively have a contact end and a connecting end, The four-seat system covers the body portions of the fourth terminals.

In the above terminal module, the fourth terminal module further includes a fourth grounding member, the fourth grounding member is coupled to the fourth base member, and the end of the fourth grounding member is provided with a plurality of extensions. The extensions are in contact with the ground terminal of the fourth terminal set.

The electrical connector of the present invention comprises the above terminal module and a housing, and the terminal module is disposed in the housing.

In the above electrical connector, the housing includes a housing and a rear cover, the housing receiving the terminal module, and the rear cover is coupled to the housing to limit the terminal module to the housing.

In the above electrical connector, the housing has an accommodating area for accommodating the terminal module, and one end of the housing has a plug-in interface, and the two inner ends of the housing have a The insertion interface is connected to the plurality of recesses, and the contact ends of the first terminals and the contact ends of the fourth terminals are respectively received in the recesses, and are disposed at the bottom of the housing and the receiving area One of the openings is connected, and the connection ends of the first terminals, the connection ends of the second terminals, the connection ends of the third terminals, and the connection ends of the fourth terminals are located at the openings.

In the above-mentioned electrical connector, the two inner side walls of the outer casing are respectively provided with a plurality of opposite sliding grooves, and the two side walls of the outer casing are respectively provided with fixing holes for connecting one of the sliding grooves, and the rear cover system comprises a baffle plate and a side plate respectively disposed on one side of the baffle plate, wherein the side plates are respectively provided with a plurality of guiding portions and a plurality of hook portions, and when the rear cover is combined with the outer casing, the guiding device is The guiding portion and the hook portion are inserted into the sliding slots, and are fastened to the fixing holes by the hook portions.

In the above electrical connector, the baffle has a plurality of limiting slots, and when the rear cover is combined with the outer casing, the connecting ends of the fourth terminals are restricted by the limiting slots.

In the above-mentioned electrical connector, two sidewalls of the outer casing and adjacent to the opening are respectively provided with two opposite perforations, and the perforations are respectively inserted with a supporting plate, and the supporting plates are provided for the first The connecting end of the terminal, the connecting end of the second terminal, and the connecting end of the third terminal abut against the connecting end of the fourth terminal.

Therefore, the terminal module of the present invention and the electrical connector thereof can be used to integrate the first terminal module, the second terminal module, the third terminal module and the fourth terminal module into one terminal module. And then placed in the housing to form an electrical connector, to achieve rapid assembly, easy to manufacture and improve production yield.

In order to fully understand the objects, features and advantages of the present invention, the present invention will be described in detail by the following specific embodiments and the accompanying drawings.

Referring to FIG. 1 to FIG. 3, the present invention is a terminal module and an electrical connector thereof, the terminal module and an electrical connector thereof. The terminal module 1 is at least a first terminal module. 11. A second terminal module 12, a third terminal module 13, and a fourth terminal module 14.

The first terminal module 11 includes a first body 111 and a first terminal group 112. The first body 111 is combined with the first terminal group 112 by injection molding, and the first body 111 is A plurality of first accommodating grooves 113 are provided at the top.

The second terminal module 12 includes a second base 121 and a second terminal set 122. The second base 121 is coupled to the second terminal set 122 by injection molding. The second base 121 is coupled to the second terminal 121. The first terminal module 11 can be combined with other structures of the second terminal module 12, and the contact end 1222 of the second terminal group 122 is disposed in the first terminal block 111. Waiting for the first receiving groove 113.

The third terminal module 13 includes a third base body 131 and a third terminal set 132. The third base body 131 is combined with the third terminal set 132 by injection molding. The third base body 131 is coupled to the third terminal block 132. The third terminal module 13 can be combined with other structures of the second terminal module 12, and the third terminal group 132 and the second terminal group 122 are mutually coupled. Corresponding to electrical contact with the electronic plug.

The fourth terminal module 14 includes a fourth base 141 and a fourth terminal set 142. The fourth base 141 is combined with the fourth terminal set 142 by injection molding. The fourth base 141 is The bottom portion is provided with a plurality of second accommodating slots 143 for receiving the contact ends 1322 of the third terminal group 132. The fourth base 141 can be combined with the third base 131, and the fourth terminal module 14 is Other structures may be combined with other structures of the third terminal module 13 , and the fourth terminal group 142 is corresponding to the first terminal group 112 to electrically contact the electronic plug piece, and the second terminal group 122 and the second terminal group 122 The third terminal group 132 is located between the first terminal group 112 and the fourth terminal group 142, and the contact end 1222 of the second terminal group 122 and the contact end 1322 of the third terminal group 132 are located at the first terminal. The contact end 1122 of the group 112 is rearward of the contact end 1422 of the fourth terminal group 142.

In addition, the left side, the right side, or the left and right sides of one of the first terminal group 112, the second terminal group 122, the third terminal group 132, and the fourth terminal group 142 may be externally arranged with a ground terminal G, The signal terminal S and the signal terminal S (FIG. 1 takes the first terminal group 112 as an example, but it is also applicable to other terminal groups). Thereby, the terminal module of the present invention can be applied to a QSFP-DD electrical connector or an SFP-DD electrical connector.

In a preferred embodiment of the present invention, the first terminal block 111 of the first terminal module 11 is respectively provided with a first abutting portion 114 on both sides of the top, and the first terminal group 112 includes a plurality of The first terminal 1120 has a body portion 1121, and the two ends of the body portion 1121 have a contact end 1122 and a connecting end 1123, respectively, and the first seat body 11 covers the first portion The first terminal module 11 further includes a first grounding member 115. The first grounding member 115 is coupled to the first base member 111 to connect the first grounding member 115 with the first grounding member 115. After the first body 111 is coupled, the first grounding member 115 is in contact with the grounding terminal G of the first terminal group 112, and the end of the first grounding member 115 is provided with a plurality of extending portions 116. The extension portion 116 is in contact with the body portion 1121 of the ground terminal G in the first terminals 1120.

In a preferred embodiment of the present invention, a second abutting portion 123 is disposed on each of the two sides of the second base 121 of the second terminal module 12, and the top sides of the second base 121 are Each of the second terminal blocks 1220 includes a plurality of second terminals 1220, and the second terminals 1220 have a body portion 1221, and the two ends of the body portion 1221 respectively have the same The second end body 121 covers the main body portion 1221 of the second terminal 1220, and the second base body 121 has a hollow portion 125, and the second terminal 1220 is a contact portion 1222 and a connecting end portion 1223. The body portion 1221 is in a completely exposed state in the hollow region 125.

In a preferred embodiment of the present invention, a third abutting portion 133 is respectively disposed on both sides of the bottom portion of the third base body 131 of the third terminal module 13 , and the top sides of the third base body 131 are respectively Each of the third terminals 1320 includes a plurality of third terminals 1320, and the third terminals 1320 have a body portion 1321, and the two ends of the body portion 1321 respectively have the same a contact portion 1322 and a connecting end 1323, the third body 131 is covered with the body portion 1321 of the third terminal 1320, and the third body 131 has a hollow region 135, and the third terminal 1320 The body portion 1321 is in a completely exposed state in the hollow region 135.

In a specific embodiment of the present invention, a fourth abutting portion 144 is respectively disposed on both sides of the bottom portion of the fourth base body 141 of the fourth terminal module 14, and the fourth terminal group 142 includes a plurality of fourth terminals. The fourth terminal 1420 has a body portion 1421. The two ends of the body portion 1421 have a contact end 1422 and a connecting end 1423. The fourth base 141 covers the fourth terminal 1420. The fourth terminal module 14 further includes a fourth grounding member 145, and the fourth grounding member 145 is coupled to the fourth base member 141 to make the fourth grounding member 145 and the fourth After the base 141 is coupled, the fourth grounding member 145 is in contact with the grounding terminal G of the fourth terminal set 142, and the end of the fourth grounding member 145 is provided with a plurality of extending portions 146, and the extending portions 146 The main body portion 1421 of the ground terminal G in the fourth terminal 1420 is in contact with each other.

When assembled, the second base 121 of the second terminal module 12 is butted with the second abutting portions 123 at the bottom of the first terminal block 111 and the first abutting portions 114 at the top of the first base body 111, and After the second body 121 is coupled to the first body 111, the contact end 1222 of one end of the second terminal 1220 is placed in the first receiving groove 113, and then the third terminal module is assembled. The third body 131 of the third body is abutted with the second abutting portions 133 at the bottom of the second base 131 and the second connecting portions 124 at the top of the second base 121, so that the third base 131 and the second seat The fourth body 141 of the fourth terminal module 14 is butted with the fourth abutting portion 144 at the bottom of the fourth terminal module 14 and the third group of connecting portions 134 at the top of the third base body 131. After the fourth body 141 is combined with the third body 131, the contact end 1422 of one end of the fourth terminal 1420 is placed in the second receiving groove 143, so that the terminal can be completed. The assembly of the module 1 and the first abutting portion 114, the second butting portion 123, the second connecting portion 124, and the third butting portion 133 are described in the present invention. A third set of such contact portion 134, these portions abutting the fourth line 144 may be recesses, perforations with each other, the stud bumps or patterns of binding.

In addition, after the second base body 121 and the third base body 131 are respectively coupled to the second terminal group 122 and the third terminal group 132 by injection molding, the second terminals 1220 are made by the hollow regions 125 and 135. The portions of the main body portions 1221 and 1321 of the third terminal 1320 are completely exposed, and are not covered by the plastic structures of the second base 121 and the third base 131, so that the second can be reliably reduced. The terminal group 122 and the third terminal group 132 are lost in signal; in addition, when the shape of the second base 121 and the third base 131 are unchanged, the size of the hollow area 125, 135 can be changed to change The exposed lengths of the body portions 1221, 1321 in the hollow regions 125, 135, thereby adjusting the impedance of the second terminal group 122 and the third terminal group 132 to a specific value; further, due to the second body 121 and the main body portions 1221 and 1321 in the hollow regions 125 and 135 of the third seat body 131 can be completely exposed, so that the mold structure can be simplified in the manufacturing process to increase the die life and save man-hours and processes.

Referring to FIG. 4 to FIG. 6 , the electrical connector 2 of the present invention includes a terminal module 1 and a housing 20 , and the terminal module 1 is disposed in the housing 20 ; The housing 20 includes a housing 21 and a rear cover 22. The housing 21 accommodates the terminal module 1. The rear cover 22 is coupled to the housing 21 to limit the terminal module 1 to the housing 1.

In a preferred embodiment of the present invention, the housing 21 has a receiving area 211, the receiving area 211 is for receiving the terminal module 1, and one end of the housing 21 has a plug-in interface 212. The top side and the bottom side of the first end of the outer casing 21 respectively have a plurality of grooves 213 and 214 communicating with the plug interface 212, and the contact ends of the first end 1120 of the first terminal 1120 and the fourth end 1420 are in contact with each other. 1422 is respectively received in the grooves 213, 214, and an opening 215 is formed in the bottom of the casing 21 to communicate with the accommodating area 211, and the connecting end 1123 of the first terminals 1120, the first The connecting end 1223 of the two terminals 1220, the connecting end 1323 of the third terminals 1320 and the connecting end 1423 of the fourth terminals 1420 are located at the opening 215.

In addition, the left inner side wall and the right inner side wall of the outer casing 21 are respectively provided with a plurality of sliding grooves 216, and the left side wall and the right side wall of the outer casing 21 are respectively provided with fixing holes 217 for communicating with the ones of the sliding grooves 216. The rear cover 22 includes a baffle 221 and a side plate 222 respectively disposed on one side of the baffle 221, and the side plates 222 are respectively provided with a plurality of guiding portions 223 and a plurality of clasp portions 224, when When the rear cover 22 is coupled to the outer casing 21, the guide portions 223 and the hook portions 224 are inserted into the sliding grooves 216, and the hook portions 224 are fastened to the fixing holes 217. And the baffle 221 has a plurality of limiting slots 225. When the rear cover 22 is coupled to the outer casing 21, the connecting ends 1423 of the fourth terminals 1420 are restricted by the limiting slots 225; A position of the left side wall and the right side wall of the 21 adjacent to the opening are respectively provided with two opposite perforations 218, and the perforations 218 are respectively inserted with a supporting plate 219, and the supporting plates 219 are provided for the first a connecting end 1123 of the terminal 1120, a connecting end 1223 of the second terminal 1220, a connecting end 1323 of the third terminal 1320, and the fourth end The connection terminal 1420 for abutting 1423; thus, can be assembled to an electrical connector 2.

The invention has been described above in terms of the preferred embodiments, and it should be understood by those skilled in the art that the present invention is not intended to limit the scope of the invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the scope of protection of the present invention is defined by the scope of the patent application.

1‧‧‧Terminal module

11‧‧‧First terminal module

111‧‧‧First body

112‧‧‧First terminal group

1120‧‧‧First terminal

1121‧‧‧ Body Department

1122‧‧‧Contact end

1123‧‧‧Connected end

113‧‧‧First accommodating slot

114‧‧‧First docking

115‧‧‧First grounding piece

116‧‧‧Extension

12‧‧‧Second terminal module

121‧‧‧Second body

122‧‧‧second terminal group

1220‧‧‧second terminal

1221‧‧‧ Body Department

1222‧‧‧Contact end

1223‧‧‧Connected end

123‧‧‧Second docking

124‧‧‧Second group of joints

125‧‧‧ hollow area

13‧‧‧ Third terminal module

131‧‧‧ third body

132‧‧‧Third terminal group

1320‧‧‧ third terminal

1321‧‧‧ Body Department

1322‧‧‧Contact end

1323‧‧‧Connected end

133‧‧‧ third docking department

134‧‧‧The third set of joints

135‧‧‧ hollow area

14‧‧‧fourth terminal module

141‧‧‧fourth body

142‧‧‧fourth terminal group

1420‧‧‧fourth terminal

1421‧‧‧ Body Department

1422‧‧‧Contact end

1423‧‧‧Connecting end

143‧‧‧Second accommodating slot

144‧‧‧Fourth Docking Department

145‧‧‧fourth grounding piece

146‧‧‧Extension

2‧‧‧Electrical connector

20‧‧‧shell

21‧‧‧ Shell

211‧‧‧Receiving area

212‧‧‧Interface

213, 214‧‧‧ grooves

215‧‧‧ openings

216‧‧ ‧ chute

217‧‧‧Fixed holes

218‧‧‧Perforation

219‧‧‧support plate

22‧‧‧ Back cover

221‧‧ ‧ baffle

222‧‧‧ side panels

223‧‧‧Guidance

224‧‧‧ buckle hook

225‧‧‧ Limit slot

G‧‧‧ Grounding terminal

S‧‧‧ signal terminal

1 is an exploded perspective view of a preferred embodiment of the terminal module of the present invention. 2 is another exploded perspective view of a preferred embodiment of the terminal module of the present invention. [Fig. 3] Fig. 3 is a schematic view showing the appearance of a preferred embodiment of the terminal module of the present invention. Fig. 4 is an exploded perspective view showing a preferred embodiment of the electrical connector of the present invention. Fig. 5 is a schematic view showing the appearance of a preferred embodiment of the electrical connector of the present invention. Fig. 6 is a schematic view showing another appearance of a preferred embodiment of the electrical connector of the present invention.

Claims (19)

A terminal module includes: a first terminal module including a first seat body and a first terminal set, the first seat system being combined with the first terminal set by injection molding, and the first terminal system a plurality of first receiving slots are formed on the top of the body; a second terminal module includes a second base body and a second terminal set, the second seat system is formed by injection molding and the second The terminal assembly is combined, the contact end of the second terminal group is received in the first receiving slot; a third terminal module includes a third base and a third terminal set, the third system In combination with the third terminal set, the third terminal set and the second terminal set correspond to each other; and a fourth terminal module includes a fourth base and a fourth terminal set. The fourth block system is combined with the fourth terminal set by injection molding, and the bottom of the fourth base body is provided with a plurality of second accommodating grooves for accommodating the contact ends of the third terminal group, the fourth terminal The group and the first terminal group correspond to each other, the second terminal group and the third end The sub-group is located behind the first terminal group and the fourth terminal group; wherein at least one side of one of the first terminal group, the second terminal group, the third terminal group, and the fourth terminal group is There are grounding terminals, signal terminals and signal terminals arranged in the outside. The terminal module of claim 1, wherein the first side of the first body is respectively provided with a first abutting portion, and the first abutting portion is coupled to the bottom of the second seat. The terminal module of claim 1, wherein the first terminal group includes a plurality of first terminals, the first terminals have a body portion, and the two ends of the body portion respectively have a contact end and a The first end system covers the body portion of the first terminals. The terminal module of claim 1, wherein the first terminal module further comprises a first grounding member, the first grounding member is coupled to the first body, and the edge of the first grounding member A plurality of extensions are provided, the extensions being in contact with the ground terminal of the first terminal set. The terminal module of claim 1, wherein a second abutting portion is respectively disposed on both sides of the bottom portion of the second base body, the second abutting portion is coupled to the top of the first base body, and the second A second set of joints is respectively arranged on both sides of the top of the seat body, and the second set of joints is coupled to the bottom of the third seat body. The terminal module of claim 1, wherein the second terminal group includes a plurality of second terminals, the second terminals have a body portion, and the two ends of the body portion respectively have the contact end and a The second end system covers the body portion of the second terminals. The terminal module of claim 6, wherein the second seat system has a hollow region, and the body portions of the second terminals are completely exposed in the hollow region. The terminal module of claim 1, wherein the third side of the third body is respectively provided with a third abutting portion, the third butting portion is coupled to the top of the second seat, and the third A third set of joints is respectively arranged on both sides of the top of the seat body, and the third set of joints is coupled to the bottom of the fourth seat body. The terminal module of claim 1, wherein the third terminal group includes a plurality of third terminals, the third terminals having a body portion, the two ends of the body portion respectively having the contact end and a The connecting end, the third seat system covers the body portion of the third terminals. The terminal module of claim 9, wherein the third seat system has a hollow region, and the body portion of the third terminal is completely exposed in the hollow region. The terminal module of claim 1, wherein the fourth base of the fourth base is respectively provided with a fourth abutting portion, and the fourth abutting portion is coupled to the top of the third base. The terminal module of claim 1, wherein the fourth terminal group includes a plurality of fourth terminals, the fourth terminals have a body portion, and the two ends of the body portion respectively have a contact end and a The connecting end, the fourth seat system covers the body portion of the fourth terminals. The terminal module of claim 1, wherein the fourth terminal module further comprises a fourth grounding member, the fourth grounding member is coupled to the fourth base member, and the fourth grounding member is connected to the edge of the fourth grounding member. A plurality of extensions are provided, the extensions being in contact with the ground terminal of the fourth terminal set. An electrical connector, comprising the terminal module according to any one of claims 1 to 13, and a housing, wherein the terminal module is disposed in the housing. The electrical connector of claim 14, wherein the housing comprises a housing and a rear cover, the housing receiving the terminal module, the rear cover being coupled to the housing to limit the terminal module Inside the enclosure. The electrical connector of claim 15, wherein the housing has an accommodating area for accommodating the terminal module, and one end of the housing has a plug-in interface, and one end of the housing The two inner sides have a plurality of grooves communicating with the insertion interface, and the contact ends of the first terminals and the contact ends of the fourth terminals are respectively received in the grooves, and are disposed at the bottom of the outer casing. One opening is connected to the accommodating area, and the connecting end of the first terminal, the connecting end of the second terminal, the connecting end of the third terminal, and the connecting end of the fourth terminal are located at the opening At the office. The electrical connector of claim 16, wherein the two inner side walls of the outer casing are respectively provided with a plurality of opposite sliding grooves, and the two side walls of the outer casing are respectively provided with fixing holes for connecting one of the sliding grooves, and The rear cover includes a baffle and one side plate respectively disposed on two sides of the baffle, and the side plates are respectively provided with a plurality of guiding portions and a plurality of clasp portions, when the rear cover is combined with the outer casing, The guide portions and the hook portions are inserted into the sliding grooves, and the hook portions are fastened to the fixing holes. The electrical connector of claim 17, wherein the baffle has a plurality of limiting slots, and when the rear cover is coupled to the outer casing, the connecting ends of the fourth terminals are restricted by the limiting slots. The electrical connector of claim 18, wherein two sidewalls of the outer casing and adjacent to the opening are respectively provided with two opposite perforations, and the perforations are respectively inserted with a supporting plate, and the supporting plates are respectively The connection ends of the first terminals, the connection ends of the second terminals, and the connection ends of the third terminals abut against the connection ends of the fourth terminals.