TWI568087B - Electrical connector and method of making the same - Google Patents

Description

Electrical connector and method of manufacturing same

The present invention relates to an electrical connector, and more particularly to an electrical connector that is easy to install and a method of manufacturing the same.

In the 3C industry, the electrical connector can serve as a medium for electrical connection between the two electronic devices and can stably perform the expected signal transmission operation. Therefore, the electrical connector is generally applied to various electronic devices. The conventional electrical connector generally includes a plurality of elongated conductive terminals formed by die bending and an insulating body for carrying the conductive terminals; the insulating body is provided with a plurality of terminal fixing slots extending in the butting direction for fixing the conductive terminals. The conductive terminal has a fixing portion fixed in the fixing groove of the terminal, a soldering leg extending from the insulating body, and an abutting portion for connecting the mating connector. With the development of science and technology, the requirements for signal transmission rate, security and size of electrical connectors are gradually increasing, so that more and more electrical connectors need to accommodate more conductive terminals for signal transmission, thereby making electricity When the connector is small in volume, the conductive terminals are arranged in a plurality of rows on the insulating body, and the soldering legs of the plurality of rows of conductive terminals are respectively arranged in a plurality of rows in the butting direction after being bent, so as to prevent the solder pins from being arranged too densely and causing a short circuit. . However, in this case, the mounting of the conductive terminals and the bending of the solder fillets are troublesome.

In view of this, it is necessary to further improve the conventional electrical connector to solve the above problems.

It is an object of the present invention to provide an electrical connector that is easy to manufacture and install and a method of manufacturing the same.

In order to achieve the above object, the present invention relates to an electrical connector comprising: an insulative housing having a base and an abutting portion extending forward from the base, the abutting portion having a longitudinally extending butt groove and oppositely disposed on opposite sides of the mating groove a first wall and a second wall, the first wall having a groove in communication with the docking groove and a first portion and a second portion formed by the groove spacing, the second wall having a first extension disposed opposite the groove and a second expansion portion disposed opposite to the second portion, the base portion has a top surface on the same surface as the outer wall surface of the first wall, a bottom surface opposite to the rear surface, and a rear surface on the rear side; and the conductive terminals are respectively disposed on the second surface a first terminal group, a second terminal group, a third terminal group and a fourth terminal group on a portion, a second portion, a first expansion portion and a second expansion portion, each of the conductive terminals having a fixing portion fixed to the base portion a contact arm extending into the mating groove and a soldering leg extending from the insulative housing, wherein the fixing portions of the conductive terminals of the first terminal group and the second terminal group extend in the front-rear direction, and each of the fourth terminal groups is electrically conductive The sub-shaped terminal is formed by the blanking, and the fixing portions of the respective chip terminals extend in a downward direction of the vertical second wall; wherein the insulating body is provided with a plurality of front and rear extensions for the first terminal group and the second terminal Each of the conductive terminals of the group is fixedly fixed to the first terminal fixing groove in the front-rear direction, and a plurality of second terminal fixing grooves extending in a downward direction of the vertical second wall and communicating with the bottom surface of the base, and fixing of the conductive terminals in the fourth terminal group The portion is mounted into the second terminal fixing groove from the outer side of the base portion in a downward direction of the vertical second wall.

According to a further improvement of the present invention, the fixing portions, the contact arms, and the soldering legs of the chip terminals of the fourth terminal group have the same width in the longitudinal direction of the insulating body.

As a further improvement of the present invention, wherein each of the fourth terminal groups has a chip end A plurality of spurs are respectively disposed on the front and rear sides of the fixing portion of the sub-portion, and a strong pressure depression is formed by strong pressing on one side surface of the longitudinal direction of the insulating body.

As a further improvement of the present invention, the contact arms of the respective chip terminals in the fourth terminal group are connected to the front side of the fixing portion near the outer wall surface of the base portion, and protrude obliquely forward into the mating groove.

As a further improvement of the present invention, the contact arm of each of the chip terminals in the fourth terminal group has a contact portion at the free end and a cantilever connected between the contact portion and the fixed portion, the cantilever has a facing groove The inner side of the direction is exposed, and the contact portion protrudes beyond the inner side toward the mating groove.

As a further improvement of the present invention, the contact arm is provided with a strong pressure recess at a connection position of the contact portion and the cantilever, and the strong pressure recess is formed by a strong pressure from one side surface of the insulating body in the longitudinal direction of the insulating body.

According to a further improvement of the present invention, each of the chip terminals of the fourth terminal group further has a connection portion connected between the fixing portion and the solder fillet, the connection portion having a front side connection portion and a connection front side connected to the fixing portion a connecting portion and a rear side connecting portion of the soldering leg, wherein the front side connecting portion is disposed closer to the outer wall surface of the base than the rear side connecting portion, so that a spacing groove is formed between the front side connecting portion and the rear side connecting portion and the fixing portion, and the insulating body is disposed on the insulating body Further, a terminal limiting groove is provided which is spaced apart from the second terminal fixing groove in the front-rear direction, and the rear side connecting portion is received in the terminal limiting groove.

According to a further improvement of the present invention, in the connection between the front side connecting portion and the rear side connecting portion of each of the chip terminals, the connection between the rear side connecting portion and the solder fillet is strongly pressed against one side surface of the insulating body in the longitudinal direction to form a strong pressure. Depression.

As a further improvement of the present invention, wherein each of the conductive terminals in the second terminal group The sub-port further has a connecting portion connected between the fixing portion and the solder fillet, and the width of the connecting portion along the longitudinal direction of the insulating body is greater than the width of the solder tail along the longitudinal direction of the insulating body.

In order to achieve the above object, the present invention also relates to a method of manufacturing an electrical connector, comprising the steps of: providing an insulative housing formed with a base and an abutting portion extending forward from the base, the butt portion being formed with a lengthwise An extended docking groove and a first wall and a second wall oppositely formed on opposite sides of the mating groove, the first wall having a groove communicating with the docking groove and a first portion and a second portion formed by the groove spacing, the second wall a first expansion portion disposed opposite to the groove and a second expansion portion disposed opposite to the second portion, the base portion having a top surface on the same surface as the outer wall surface of the first wall, a oppositely disposed bottom surface, and a rear portion a side rear surface, the first portion, the second portion and the rear side of the first expansion portion are formed with a plurality of first terminal fixing grooves extending forward and backward and open rearward, and a plurality of vertical portions are formed on the rear side of the second expansion portion a second terminal fixing groove extending in a lower direction of the second wall and communicating with the bottom surface of the base; providing a plurality of conductive terminals, and dividing the conductive terminal into the first terminal group, the second terminal group, and the third a sub-group and a fourth terminal group, each of the conductive terminals forming a contact arm and a soldering leg, a first terminal group, a second terminal group and a third terminal group, which are used for mounting and fixing the fixing portions, respectively located at the front side and the rear side of the fixing portion The fixing portion of each of the conductive terminals extends in the front-rear direction, and each of the conductive terminals in the fourth terminal group is a sheet-shaped terminal formed by blanking, and the fixing portions of the respective chip terminals extend in the vertical direction; the first terminal group, the first terminal group Each of the two terminal groups and the third terminal group are respectively mounted from the rear to the front to the first portion, the second portion and the first extension of the insulative housing such that the first terminal group, the second terminal group and the third terminal group The fixing portion of each of the conductive terminals is arranged in the front and rear directions The first terminal fixing groove is fixed in the first terminal fixing slot; the conductive terminals in the fourth terminal group are mounted from the outer side of the second wall along the upper side of the vertical second wall to the second extension portion of the insulating body, so that the fourth terminal group is The fixing portion of each of the conductive terminals is mounted and fixed in the second terminal fixing groove along the upper and lower sides of the vertical second wall.

The invention adopts the blanking forming of each conductive terminal in the fourth terminal group, thereby eliminating the need for the bending of the tail soldering foot, and the strength of the soldering leg is better; in addition, the insulating body is used for fixing the fourth terminal group. The terminal fixing grooves of each of the conductive terminals are disposed to extend in a direction perpendicular to the second wall and communicate with the outer wall surface of the base such that the fixing portions of the conductive terminals of the fourth terminal group are mounted into the second terminal in the direction perpendicular to the second wall from the outer side of the base The fixing groove is not interfered with the installation or bending of the conductive terminals in the other terminal groups, the assembly and manufacturing process is simple, and the installation or bending operation space is saved for the rear conductive terminals.

100‧‧‧Electrical connector

1‧‧‧Insulating body

11‧‧‧ base

111‧‧‧ top surface

112‧‧‧ bottom

1121‧‧‧Installation surface

113‧‧‧Back surface

15‧‧‧First terminal fixing slot

16‧‧‧Second terminal fixing groove

17‧‧‧Terminal limit slot

18‧‧‧Parts

114‧‧‧Boss

1141‧‧‧ openings

12‧‧‧Docking Department

121‧‧‧ docking slot

122‧‧‧ first wall

1221‧‧‧ Groove

1222‧‧‧Part 1

1223‧‧‧Part II

123‧‧‧ second wall

1231‧‧‧First Extension

1232‧‧‧Second Extension

1234‧‧‧Terminal receiving slot

12321‧‧‧Limited bumps

1233‧‧‧Support block

13‧‧‧ Guide column

131‧‧‧Guide

132‧‧‧ Column

14‧‧‧Fixed block

141‧‧‧Positioning column

142‧‧‧Fixed holes

2‧‧‧Electrical terminals

20‧‧‧First terminal group

21‧‧‧Second terminal group

22‧‧‧ Third terminal group

23‧‧‧fourth terminal group

24‧‧‧Fixed Department

241‧‧‧Spurs

25‧‧‧Contact arm

251‧‧‧First contact

252‧‧‧First cantilever

253‧‧‧Second contact

254‧‧‧second cantilever

2541‧‧‧ inside side

26‧‧‧ solder feet

27‧‧‧Connecting Department

271‧‧‧ Front side connection

272‧‧‧Back side connection

270‧‧‧ spacing slot

28‧‧‧ Strong depression

The first figure is a perspective view of a preferred embodiment of the electrical connector of the present invention.

The second figure is a perspective view of another angle of the first figure.

The third figure is an exploded perspective view of the electrical connector shown in the first figure.

The fourth figure is an exploded perspective view of another angle of the electrical connector shown in the first figure.

Figure 5 is a perspective view of the insulative housing of the electrical connector shown in Figure 3.

The sixth figure is an enlarged view of the circled portion in the fifth figure.

Figure 7 is a perspective view of the fourth terminal of the electrical connector shown in Figure 3.

Please refer to the first to seventh figures for one of the electrical connectors 100 of the present invention. In a preferred embodiment, the electrical connector 100 includes an insulative housing 1 and a plurality of conductive terminals 2 fixed in the insulative housing 1.

As shown in the first to fourth figures, the insulative housing 1 is generally elongated and has a base portion 11, an abutting portion 12 extending forward from the base portion 11, and extending forward from the front end portions of the base portion 11, respectively. Two guide posts 13 and two fixing blocks 14 projecting outward from the rear ends of the base portion 11, respectively. The guide posts 13 are respectively connected to both sides of the abutting portion 12 in the longitudinal direction, and have a quadrangular pyramid-shaped guiding portion 131 at the front end and a columnar portion 132 connected to the rear side of the guiding portion 131. The fixing block 14 is connected to the rear side of the guide post 13 , and is disposed at a position close to the guide post 13 with a downwardly projecting positioning post 141 , and a fixing hole 142 extending through the bottom end thereof for facilitating the invention. The connector 100 is securely attached to a circuit board (not shown).

The abutting portion 12 has a longitudinally extending butting groove 121 and a first wall 122 and a second wall 123 opposite to the upper and lower sides of the mating groove 121. The docking slot 121 is open to the front and is used to receive a docking connector (not shown). The first wall 122 has a groove 1221 communicating with the docking groove 121 and a first portion 1222 and a second portion 1223 formed by the groove 1221. The conductive terminal is not disposed in the recess 1221 and penetrates the front end surface of the insulating body 1 in the mating direction.

The second wall 123 has a first expanded portion 1231 disposed opposite to the groove 1221 in the thickness direction and a second expanded portion 1232 disposed opposite to the second portion 1222 in the thickness direction. The first expansion portion 1231 is located between the first portion 1222 and the second portion 1223 in the longitudinal direction of the insulative housing 1. The front side of the second expansion portion 1232 and the first expansion portion 1231 are exposed to the inner side of the inner wall of the mating groove 121, and the front side of the inner wall of the second wall 123 is further provided with a plurality of orientations. a support block 1233 protrudingly and spaced apart in the groove 121, the inner wall surface of the support block 1233 and the two sides of the first expansion portion 1231 and the front side of the second expansion portion 1232 The wall surface is correspondingly arranged in a step shape so that the electrical connector 100 and the mating connector of the present invention can adopt a tilt plug fit. Correspondingly, the columnar portion 132 of the guide post 13 is also recessed downwardly toward the side of the first wall 122 in a stepped manner to guide the electrical connector 100 of the present invention and the mating connector to adopt a tilting mating engagement. The second wall 123 faces away from the outer wall surface of the mating groove 121 as a flat surface.

The base portion 11 has a top surface 111 on the same surface as the outer wall surface of the first wall 122, a bottom surface 112 opposite to each other, a rear surface 113 on the rear side, and a plurality of first terminal fixing grooves 15 extending in the front-rear direction and extending therethrough. And a plurality of second terminal fixing grooves 16 extending in a downward direction of the vertical second wall 123 and communicating with the bottom surface 112 of the base portion 11, and a boss 114 extending rearward from the rear surface 113. The rear surface of the bottom surface 112 is recessed upward to form a mounting surface 1121 for mounting a circuit board, so that the electrical connector 100 of the present invention can be mounted to the circuit board in a sinking manner. The first terminal fixing groove 15 extends forward through the first portion 1222 of the abutting portion 12, the second portion 1223, and the first expanding portion 1231. The second expansion portion 1232 is provided with a terminal receiving groove 1234 that vertically communicates with the butting groove 121 and the outer wall surface of the second wall 123. The terminal receiving groove 1234 communicates with the second terminal fixing groove 16 back and forth.

The first portion 1223 and the first extending portion 1231 are respectively provided with seven first terminal fixing slots 15 , and the first portion 1222 is provided with fifteen first terminal fixing slots 15 . The boss 114 is provided with a plurality of openings 1141 disposed at intervals. The opening 1141 is disposed in one-to-one correspondence with the first terminal fixing groove 15 on the first portion 1222 and the second portion 1223. The second expansion slot 1222 is provided with three terminal receiving slots 1234. Accordingly, the second terminal fixing slots 16 are also provided with three. The second extension portion 1232 forms a limit protrusion 12321 on the front side of the terminal receiving groove 1234.

Referring to the first to fourth figures, the conductive terminals 2 are respectively disposed on the first portion 1222, the second portion 1223, the first extension portion 1231, and the second extension portion 1232. The first terminal group 20, the second terminal group 21, the third terminal group 22, and the fourth terminal group 23. Each of the conductive terminals 2 has a fixing portion 24 fixed to the base portion 11, a contact arm 25 projecting into the mating groove 121, a solder tail 26 extending from the mounting surface 1121, and a connecting portion 27 connecting the fixing portion 24 and the solder fillet 26.

The first terminal group 20 includes fifteen conductive terminals 2, which are respectively referred to as first terminals, and the first terminals are respectively disposed in the first terminal fixing slots 15 of the first portion 1222 of the insulative housing 1. And the fifteen first terminals conform to the definition of terminals P1-P15 in the SATA connector specification. Each of the second terminal group 21 and the third terminal group 22 includes seven conductive terminals 2, and correspondingly disposed on the second portion 1223 of the insulative housing 1 and the first terminal fixing slot 15 on the first extension portion 1231. Inside. The seven conductive terminals 2 of the second terminal group 21 are hereinafter referred to as the second terminals, which conform to the definition of the signal terminals S1-S7 in the SATA connector specification; the seven conductive terminals 2 of the third terminal group 22 are subsequently It is called the third terminal and it conforms to the definition of the signal terminals S8-S14 in the SATA connector specification. The fourth terminal group 23 includes three conductive terminals 2 respectively corresponding to the terminal receiving grooves 1234 fixed on the second expanding portion 1232, which are respectively referred to as fourth terminals, and the three fourth terminals conform to the SATA connector specification. The definition of the middle terminal E7-E9. In addition, the arrangement of the conductive terminals 2 in the insulative housing 1 is the same as the arrangement direction in the SATA connector specification, that is, the contact arms 25 of the first terminal and the second terminal are disposed in a row on the upper side of the docking slot 121. The contact arms 25 of the third terminal and the fourth terminal are disposed in a row on the lower side of the mating groove 121.

The first terminal, the second terminal, and the third terminal are both elongated terminals formed by press bending, and the fixing portions 24 of the first terminal, the second terminal, and the third terminal are all extended in the front-rear direction and horizontally disposed. Therefore, the rear end of the insulating body 1 can be mounted forward into the first terminal fixing groove 15 at the time of installation. The contact arms 25 of the first terminal, the second terminal, and the third terminal respectively have a first contact portion 251 protruding into the docking groove 121 in a V shape or an inverted V, connecting the first contact portion 251 and the fixing portion 24 and a first cantilever 252 extending obliquely. The connecting portion 27 and the solder fillet 26 of the first terminal both extend perpendicular to the fixing portion 24, and the connecting portion 27 is positioned within the opening 1141 of the boss 114. The connecting portion 27 of the second terminal extends perpendicularly to the fixing portion 24, and the solder tail 26 is bent backward from the lower end of the connecting portion 27 parallel to the fixing portion 24 to be soldered to the circuit board by surface soldering; and the second terminal The width of the connecting portion 27 along the longitudinal direction of the insulative housing 1 is greater than the width of the solder tail 26 along the longitudinal direction of the insulative housing 1 to adjust the impedance matching of the second terminal. The connecting portion 27 of the third terminal first extends upward and rearward, and the solder tail 26 of the third terminal is bent and extended from the rear end of the connecting portion 27, and is disposed in parallel with the fixing portion 24, and the third terminal and the second terminal The soldering legs 26 are located on the same plane. However, the soldering legs 26 of the second terminal and the soldering legs 26 of the third terminal are designed to be staggered back and forth, thereby facilitating soldering and avoiding short circuits.

Referring to the second to fourth and seventh figures, each of the conductive terminals 2, that is, the fourth terminal of the fourth terminal group 23 is a chip terminal formed by blanking, so that each of the chip terminals The fixing portion 24, the contact arm 25, the solder fillet 26 and the connecting portion 27 have the same width in the longitudinal direction of the insulative housing 1; the solder tails 26 of the fourth terminal formed by the blanking are better in strength, and are not required to be made. The bending process makes the assembly process simple, and can also save a large space for the bending operation of the solder tail 26 of the rear second terminal. The fixing portions 24 of the chip terminals extend upward in the direction perpendicular to the second wall 123, and a plurality of spurs 241 are respectively disposed on the front and rear sides, so that the second terminal is fixed from the outer side of the bottom surface 112 of the base portion 11 in the direction perpendicular to the second wall 123. Inside the slot 16.

The contact arm 25 of each of the chip terminals of the fourth terminal group 23 is connected to the front side of the fixing portion 24 near the bottom surface 112 of the base portion 11 and protrudes forwardly into the mating groove 121. The contact arm 25 of each chip terminal has a second contact portion 253 at the free end and a second cantilever 254 connected between the second contact portion 253 and the fixed portion 24; the second cantilever 254 has abutting The inner side surface 2541 is exposed in the direction of the groove 121; the second contact portion 253 protrudes beyond the inner side surface 2541 toward the mating groove 121, and has a substantially triangular shape to enhance the abutting force of the second contact portion 253. The limiting protrusion 12321 is located directly in front of the second contact portion 253 to limit the second contact portion 253.

The connecting portion 27 of each of the chip terminals in the fourth terminal group 23 has a front side connecting portion 271 and a connecting front side connecting portion 271 and a solder tail 26 rear side connecting portion 272 connected to the fixing portion 24; the front side connecting portion 271 is compared The rear side connecting portion 272 is disposed near the bottom surface 112 of the base portion 11 such that a spacing groove 270 is formed between the front side connecting portion 271, the rear side connecting portion 272 and the fixing portion 24, and the insulating body 1 is further provided with the front and rear directions and the The second terminal fixing groove 16 is spaced apart from the terminal limiting groove 17 , and the rear side connecting portion 272 is received in the terminal limiting groove 17 to further limit the fourth terminal in the front-rear direction and the left-right direction. A partitioning beam 18 is formed between the second terminal fixing groove 16 and the terminal limiting groove 17. After the fourth terminal is installed, the spacer beam 18 is received in the spacing groove 270; the soldering leg 26 of the fourth terminal is vertical The mounting surface 1121 extends out and is located on the front side of the solder tail 26 of the second terminal.

In addition, in order to enhance the strength of the fourth terminal, the connection portion 24 of the fourth terminal of the present invention, the connection position of the second contact portion 253 and the second cantilever 254, the connection between the front side connection portion 271 and the rear side connection portion 272, and the rear The junction between the side connecting portion 272 and the solder fillet 26 is strongly pressed against one side surface of the insulating body 1 in the longitudinal direction to form a strong pressure recess 28.

In connection with the above structure of the electrical connector 100 of the present invention, the present invention also relates to a method of manufacturing the electrical connector 100, the manufacturing method comprising the steps of: providing the insulative housing 1; providing a plurality of the conductive terminals 2, and The conductive terminal 2 is divided into the first terminal group 20, the second terminal group 21, the third terminal group 22, and the fourth terminal group 23, and each of the conductive terminals 2 is formed to be useful. The fixing fixing portion 24, the contact arm 25 and the solder tail 26 respectively located on the front side and the rear side of the fixing portion 24, and the fixing portions of the respective conductive terminals 2 in the first terminal group 20, the second terminal group 21 and the third terminal group 22 24 extending in the front-rear direction, each of the conductive terminals 2 of the fourth terminal group 23 is a sheet-shaped terminal formed by blanking, and the fixing portions 24 of the respective chip terminals extend in the up-and-down direction; the first terminal group 20 and the second terminal are The conductive terminals 2 of the group 21 and the third terminal group 22 are respectively mounted from the rear to the front to the first portion 1222, the second portion 1223 and the first extension portion 1231 of the insulative housing 1 such that the first terminal group 20 and the second terminal The fixing portions 24 of the conductive terminals 2 in the group 21 and the third terminal group 22 are mounted and fixed in the first terminal fixing groove 15 in the front-rear direction; the conductive terminals 2 in the fourth terminal group 23 are vertically from the outside of the second wall 123 The second wall 123 is mounted on the second extension portion 1232 of the insulative housing 1 such that the fixing portion 24 of each of the conductive terminals 2 in the fourth terminal group 23 is fixed to the second terminal in the upper and lower directions of the vertical second wall 123. Inside the slot 16.

In summary, the present invention mainly adopts the blanking of each conductive terminal 2 in the fourth terminal group 23, so that the bending of the tail soldering leg 26 is not required, and the strength of the soldering leg is better; The second terminal fixing groove 16 of the main body 1 for fixing the respective conductive terminals 2 of the fourth terminal group 23 is disposed to extend in the direction of the vertical second wall 123 and communicate with the outer wall surface of the base portion 11 such that the fixing portion 24 of the fourth terminal The second terminal fixing groove 16 can be installed from the outer side of the base portion 11 in the direction perpendicular to the second wall 123, so that it does not interfere with the mounting or bending of the conductive terminal 2 in the other terminal groups, and the assembly and manufacturing process is simple, and the rear conductive is Terminal 2 saves a significant amount of installation or bending operation space.

It is to be understood that the equivalents of the invention are intended to be included within the scope of the invention as claimed.

100‧‧‧Electrical connector

1‧‧‧Insulating body

11‧‧‧ base

114‧‧‧Boss

12‧‧‧Docking Department

141‧‧‧Positioning column

142‧‧‧Fixed holes

15‧‧‧First terminal fixing slot

16‧‧‧Second terminal fixing groove

2‧‧‧Electrical terminals

Claims (10)

An electrical connector includes: an insulative housing having a base and an abutting portion extending forward from the base, the abutting portion having a longitudinally extending abutting groove and a first wall and a second wall oppositely disposed on opposite sides of the abutting groove a first wall having a groove communicating with the docking groove and a first portion and a second portion formed by the groove spacing, the second wall having a first expansion portion disposed opposite to the groove and a second portion disposed opposite to the second portion a second extension portion, the base portion has a top surface on the same surface as the outer wall surface of the first wall, a bottom surface opposite to the rear surface, and a rear surface on the rear side; and the conductive terminals are respectively disposed on the first portion, the second portion, and the first portion a first terminal group, a second terminal group, a third terminal group, and a fourth terminal group on the extension portion and the second extension portion, each of the conductive terminals having a fixing portion fixed to the base portion, a contact arm protruding into the docking groove, and a soldering leg extending from the insulative housing, wherein the fixing portions of the conductive terminals of the first terminal group and the second terminal group extend in a front-rear direction, and each of the conductive terminals in the fourth terminal group is a chip terminal formed by blanking And the fixing portion of each of the chip terminals extends in a downward direction of the vertical second wall; wherein the insulating body is provided with a plurality of front and rear extensions for mounting and fixing the conductive terminals of the first terminal group and the second terminal group in the front-rear direction a first terminal fixing groove, a plurality of second terminal fixing grooves extending in a downward direction of the vertical second wall and communicating with the bottom surface of the base, wherein the fixing portions of the conductive terminals in the fourth terminal group are located above the vertical second wall from the outer side of the base Install the direction into the second terminal fixing groove. The electrical connector according to claim 1, wherein the fixing portions, the contact arms and the soldering legs of the chip terminals in the fourth terminal group have the same width in the longitudinal direction of the insulating body. The electrical connector of claim 1, wherein each of the fourth terminal groups has a sheet shape A plurality of spurs are respectively disposed on the front and rear sides of the fixing portion of the terminal, and a strong pressure depression is formed by strong pressing on one side surface of the longitudinal direction of the insulating body. The electrical connector of claim 1, wherein the contact arms of the chip terminals of the fourth terminal group are connected to the front side of the fixed portion near the outer wall surface of the base, and are obliquely protruded forward. Said in the docking slot. The electrical connector of claim 1, wherein the contact arms of the chip terminals of the fourth terminal group have a contact portion at a free end and a cantilever connected between the contact portion and the fixed portion, The cantilever has an inner side exposed in the direction of the mating groove, and the contact portion protrudes beyond the inner side toward the mating groove. The electrical connector of claim 5, wherein the contact arm is provided with a strong pressure recess at a connection position of the contact portion and the cantilever, the strong pressure recessed from the cantilever arm along a longitudinal side surface of the insulating body Strong pressure is formed. The electrical connector of claim 1, wherein each of the chip terminals of the fourth terminal group further has a connecting portion connected between the fixing portion and the soldering leg, the connecting portion having a connection with the fixing portion a front side connecting portion and a connecting front side connecting portion and a solder tail rear side connecting portion, wherein the front side connecting portion is disposed closer to the base outer wall surface than the rear side connecting portion, such that a gap is formed between the front side connecting portion, the rear side connecting portion and the fixing portion In the slot, the insulative housing is further provided with a terminal limiting slot which is spaced apart from the second terminal fixing slot in the front-rear direction, and the rear connecting portion is received in the terminal limiting slot. The electrical connector of claim 7, wherein the connection between the front side connecting portion and the rear side connecting portion of each of the chip terminals, the connection between the rear side connecting portion and the solder fillet is along one of the longitudinal directions of the insulating body The side surface is strongly pressed to form a strong pressure depression. The electrical connector of claim 1, wherein each of the conductive terminals of the second terminal group further has a connecting portion connected between the fixing portion and the soldering leg, the connecting portion is along a longitudinal direction of the insulating body The width is greater than the width of the solder fillet along the longitudinal direction of the insulating body. A method of manufacturing an electrical connector, comprising the steps of: providing an insulative housing having a base portion and an abutting portion extending forward from the base portion, the mating portion being formed with a longitudinally extending butt groove and oppositely formed in the butt joint a first wall and a second wall on both sides of the groove, the first wall has a groove communicating with the docking groove and a first portion and a second portion formed by the groove spacing, the second wall having a first portion opposite to the groove And an extension portion and a second extension portion disposed opposite to the second portion, the base portion having a top surface on the same surface as the outer wall surface of the first wall, an oppositely disposed bottom surface, and a rear surface on the rear side, the base portion being The first portion, the second portion and the rear side of the first expansion portion are formed with a plurality of first terminal fixing grooves extending forward and backward and open rearward, and a plurality of rear sides of the second expansion portion are formed to extend along the vertical direction of the second vertical wall and communicate with the base portion a second terminal fixing groove of the bottom surface; providing a plurality of conductive terminals, and dividing the conductive terminals into a first terminal group, a second terminal group, a third terminal group and a fourth terminal group, each conductive Forming a fixing portion for mounting and fixing, a contact arm and a soldering leg respectively located at a front side and a rear side of the fixing portion, and fixing portions of the respective conductive terminals of the first terminal group, the second terminal group and the third terminal group extend in the front-rear direction Each of the conductive terminals in the fourth terminal group is a chip terminal formed by blanking, and the fixing portions of the chip terminals extend in the up and down direction; and each of the first terminal group, the second terminal group, and the third terminal group is electrically conductive The terminals are respectively mounted from the rear to the front to the first portion, the second portion and the first extension of the insulative housing, such that the fixing portions of the conductive terminals of the first terminal group, the second terminal group and the third terminal group are installed in the front-rear direction fixed The first terminal fixing groove is mounted; the conductive terminals of the fourth terminal group are mounted from the outer side of the second wall in the vertical direction of the vertical second wall to the second extension portion of the insulating body, so that the conductive terminals in the fourth terminal group The fixing portion is mounted and fixed in the second terminal fixing groove along the upper and lower sides of the vertical second wall.