CN113948897B

CN113948897B - Electric connector

Info

Publication number: CN113948897B
Application number: CN202111061610.9A
Authority: CN
Inventors: 黄常伟
Original assignee: Lotes Co Ltd
Current assignee: Lotes Co Ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2023-07-21
Anticipated expiration: 2041-09-10
Also published as: CN113948897A

Abstract

The invention discloses an electric connector, comprising: the insulation body is provided with a containing groove penetrating up and down, and a first stop part and a second stop part which are staggered up and down and are staggered back and forth are arranged in the containing groove; the terminal is accommodated in the accommodating groove, the terminal is provided with a connecting arm, a contact part connected with one end of the connecting arm, a guide connection part connected with the other end of the connecting arm and an extension arm connected with the contact part and the guide connection part, a first conductive path of the terminal passes through the contact part, the connecting arm and the guide connection part, a second conductive path passes through the contact part, the extension arm and the guide connection part, the connecting arm forms a limiting part on the first conductive path, the extension arm forms a biasing part on the second conductive path, the biasing part and the limiting part are staggered up and down and are staggered, the limiting part is positioned below the first blocking part and blocked upwards, and the biasing part is positioned above the second blocking part and blocked downwards, so that the terminal is limited in the corresponding accommodating groove, and the generation of antenna effect is effectively prevented, thereby being beneficial to the transmission of high-frequency signals.

Description

Electric connector

[ field of technology ]

The present invention relates to an electrical connector, and more particularly, to an electrical connector for electrically connecting a chip module to a circuit board.

[ background Art ]

An electrical connector for electrically connecting a chip module to a circuit board is generally known in the industry, and comprises an insulating body and a plurality of conductive terminals, wherein the insulating body is provided with a plurality of accommodating grooves penetrating up and down for accommodating the plurality of conductive terminals; each conductive terminal is provided with a fixing part, an upper elastic arm formed by upwards extending from the fixing part, and a lower elastic arm formed by downwards extending from the fixing part, wherein the upper elastic arm is used for being electrically connected with the chip module, the lower elastic arm is used for being electrically connected with the circuit board, when the chip module is downwards pressed against the upper elastic arm, the upper elastic arm is downwards inclined, and the lower elastic arm is upwards inclined, so that the upper elastic arm is contacted with the lower elastic arm to form a conductive path, and meanwhile, an electric signal can also pass through the upper elastic arm, the fixing part and the lower elastic arm to form another conductive path, so that the conductive terminal forms two conductive paths for transmitting the electric signal.

In this electrical connector, the fixing portion is provided with a protrusion to enhance interference with the insulating body, so that the conductive terminal is held on the insulating body, the upper elastic arm and the lower elastic arm can be contacted after being crimped, and the upper elastic arm and the lower elastic arm are not contacted at the ends of the upper elastic arm and the lower elastic arm, but are contacted at a position spaced from the ends, so that when an electrical signal is transmitted from the two conductive paths, the protrusion on the fixing portion, the ends of the upper elastic arm and the ends of the lower elastic arm all generate an antenna effect to affect transmission of a high-frequency signal.

Therefore, in view of the above problems, there is a need to design a new electrical connector that addresses the above drawbacks.

[ invention ]

Aiming at the problems faced by the background technology, the invention provides the electric connector, which is characterized in that the first limiting part and the biasing part are arranged in a vertically staggered manner and in a front-back staggered manner and are arranged on the conducting path of the terminal, so that the terminal is limited on the insulating body, the antenna effect is effectively prevented, and the transmission of high-frequency signals is facilitated.

In order to achieve the above purpose, the invention adopts the following technical means:

an electrical connector, comprising: the insulation body is provided with at least one accommodating groove, the accommodating groove penetrates through the insulation body up and down, a first stop part and a second stop part are arranged in the accommodating groove of the insulation body, and the first stop part and the second stop part are arranged in a staggered manner up and down and front and back; the terminal comprises a connecting arm, a contact part connected with one end of the connecting arm, a guide connection part connected with the other end of the connecting arm and an extension arm connected with the contact part and the guide connection part, wherein the contact part protrudes upwards out of the accommodating groove, the guide connection part protrudes downwards out of the accommodating groove, the terminal comprises a first conductive path and a second conductive path, the first conductive path passes through the contact part, the connecting arm and the guide connection part, the second conductive path passes through the contact part, the extension arm and the guide connection part, the connecting arm forms a limiting part on the first conductive path, the extension arm forms a biasing part on the second conductive path, the biasing part and the limiting part are arranged in a staggered mode from top to bottom, the limiting part is located below the first blocking part and is blocked upwards, the biasing part is located above the second blocking part and is located below the corresponding to the accommodating groove.

Further, the terminal is a sheet metal blanking forming structure, and the biasing portion is formed by bending one part of the extension arm relative to the plate surface where the other part of the extension arm is located.

Further, the extension arm includes a first arm connecting the contact portion and the offset portion and a second arm connecting the offset portion and the guide portion, the offset portion being located behind the contact portion and the guide portion.

Further, the offset portion is arc-shaped, and the terminals are assembled in the corresponding receiving grooves in the up-down direction.

Further, the connecting arm comprises a base, an upper elastic arm connecting the base and the contact part, and a lower elastic arm connecting the base and the guide part, the limiting part is arranged on the upper elastic arm or the lower elastic arm, the base is positioned behind the biasing part, and the base and the lower elastic arm are arranged at intervals.

Further, the upper elastic arm is formed to extend obliquely forward and upward from the base, and the upper elastic arm forms the stopper at one end connected to the base.

Further, the first stop portion is a stop surface that is inclined and provided downward.

Further, the second stopping part is a stopping surface which is horizontal and is arranged upwards.

Further, the terminal is a sheet metal blanking forming structure with the same plate thickness, the extension arm comprises a first arm connected with the contact part and the offset part and a second arm connected with the offset part and the guide connection part, the width of the upper elastic arm gradually decreases from the base part to the contact part, the width of the lower elastic arm gradually decreases from the base part to the guide connection part, the width of the first arm gradually decreases from the offset part to the contact part, and the width of the second arm gradually decreases from the offset part to the guide connection part.

Further, each of the terminals has a larger size in the front-rear direction than in the left-right direction, the electrical connector includes a plurality of the terminals including at least one signal terminal and a plurality of ground terminals, the plurality of ground terminals are provided around each of the signal terminals, and the size of the signal terminals in the front-rear direction is smaller than the size of the ground terminals in the front-rear direction.

Further, the plurality of terminals are arranged in a plurality of rows, wherein the plurality of terminals of one row are arranged in the front-rear direction, and in the row, a distance between the signal terminal and the ground terminal adjacent to one side is smaller than a distance between the signal terminal and the ground terminal adjacent to the other side.

Further, the accommodating groove is provided with two end walls which are oppositely arranged in the front-rear direction and two side walls which are oppositely arranged in the left-right direction, one side wall is concavely arranged in the left-right direction to form a groove, the groove penetrates through the insulating body upwards, and the bottom surface of the groove forms the second stop part.

Further, corresponding to each of the accommodating grooves, the insulating body is provided with a protruding portion protruding from the end wall located at the rear side toward the accommodating groove, the protruding portion is connected with the two side walls, and the bottom surface of the protruding portion forms the first stopping portion.

Further, another side wall is concavely arranged along the left-right direction to form an opening, the opening penetrates through the insulating body up and down, and the opening is opposite to the groove along the left-right direction.

Further, the extension arm, the connection arm, the contact portion and the guide portion enclose a through groove, and the through groove extends continuously between the contact portion and the guide portion.

Compared with the prior art, the invention has the following beneficial effects:

the first stopping part and the second stopping part in the accommodating groove are arranged in a vertically staggered manner and in a front-back staggered manner; the contact part, the connecting arm and the guide connection part of the terminal are arranged into the first conductive path, the contact part, the extension arm and the guide connection part of the terminal are arranged into the second conductive path, the connecting arm forms a limiting part on the first conductive path, the extension arm forms a biasing part on the second conductive path, the biasing part and the limiting part are arranged in a vertically staggered and front-back staggered mode, the limiting part is arranged below the first blocking part and is blocked upwards, the biasing part is arranged above the second blocking part and is blocked downwards, so that the terminal is easy to install and can be stably limited in the corresponding containing groove, in addition, a fixing structure which is clamped with the insulating body in an interference mode is not required to be additionally arranged outside the conductive path, an antenna effect is avoided, the terminal can transmit electric signals through the first conductive path and the second conductive path, therefore the self-inductance effect of the terminal is effectively reduced, and the electrical impedance effect of the second connector is improved, and the requirement for high-frequency signal transmission is met.

[ description of the drawings ]

FIG. 1 is an exploded perspective view of an electrical connector of the present invention;

FIG. 2 is a perspective view of the terminal of FIG. 1;

FIG. 3 is a combined perspective view of FIG. 1;

fig. 4 is a partially cut-away perspective view of one of the terminals of fig. 3 without the insulative housing inserted therein;

FIG. 5 is a top view of FIG. 3;

FIG. 6 is an enlarged view of A in FIG. 5;

FIG. 7 is a cross-sectional view taken along line B-B in FIG. 5;

FIG. 8 is a schematic view of the electrical connector of FIG. 5 taken along line C-C and not mated with the first and second mating members;

FIG. 9 is a schematic view of the electrical connector of FIG. 8 after mating with a first mating member and a second mating member;

FIG. 10 is a cross-sectional view taken along line D-D of FIG. 5;

fig. 11 is a sectional view taken along line E-E in fig. 5.

Reference numerals of the specific embodiments illustrate:

electric connector 100	Insulation body 1	Accommodating groove 11	End wall 111
				Side wall 112	Convex portion 12	First stopper 121	Groove 13
Second stopper 131	Opening 14	Terminal 2	Signal terminal 2S
				Ground terminal 2G	Connecting arm 21	Base 211	Upper spring arm 212
Limit portion 212a	Lower spring arm 213	Contact portion 22	Guide connection part 23
				Extension arm 24	First arm 241	Second arm 242	Offset portion 243
Through groove 25	First conductive path L1	Second conductive path L2	First docking member 200
				Second docking member 300

[ detailed description ] of the invention

For a better understanding of the invention with objects, structures, features, and effects, the invention will be described further with reference to the drawings and to the detailed description.

As shown in fig. 3, 8 and 9, the electrical connector 100 of the present invention is used for electrically connecting a first mating member 200 and a second mating member 300, for example, the first mating member 200 is a chip module, the second mating member 300 is a circuit board, and in other embodiments, the first mating member 200 and the second mating member 300 may be the circuit board or other components.

For ease of understanding, the right direction of the left-right direction is defined as the positive direction of the X-axis, the forward direction of the front-rear direction is defined as the positive direction of the Y-axis, and the upward direction of the up-down direction is defined as the positive direction of the Z-axis.

As shown in fig. 1, 3 and 5, the electrical connector 100 includes an insulative housing 1 and a plurality of terminals 2 accommodated in the insulative housing 1, wherein the plurality of terminals 2 includes a plurality of signal terminals 2S and a plurality of ground terminals 2G, and the plurality of terminals 2 are arranged in a plurality of rows along the left-right direction, and one row of terminals 2 may be composed of only one single terminal 2, or may be composed of a plurality of terminals 2 arranged in a row along the front-rear direction.

As shown in fig. 3, 4 and 5, the insulating body 1 has a plurality of receiving grooves 11 arranged in a plurality of rows in the left-right direction, one row of receiving grooves 11 may be composed of only one receiving groove 11, or may be composed of a plurality of receiving grooves 11 arranged in the front-rear direction, each receiving groove 11 penetrates the insulating body 1 up and down, wherein the receiving groove 11 having a longer length in the front-rear direction is used for receiving the ground terminal 2G, and the receiving groove 11 having a shorter length is used for receiving the signal terminal 2S.

As shown in fig. 4, 6 and 11, the housing groove 11 has two end walls 111 disposed opposite to each other in the front-rear direction, two side walls 112 disposed opposite to each other in the left-right direction, and the insulating body 1 has a protrusion 12 protruding from the end wall 111 located at the rear side toward the housing groove 11, the protrusion 12 connects the two side walls 112, a first stop portion 121 is formed on the bottom surface of the protrusion 12, and the first stop portion 121 is a stop surface disposed obliquely and downward. In other embodiments, the protrusions 12 may also be formed protruding from the side wall 112.

As shown in fig. 4, 6 and 11, in the present embodiment, a recess 13 is concavely formed in the insulating body 1 corresponding to each of the receiving grooves 11 from one of the side walls 112, and the recess 13 penetrates upward through the upper surface of the insulating body 1, but does not penetrate downward through the lower surface of the insulating body 1 (refer to fig. 7), so that a second stop portion 131 is formed on the bottom surface of the recess 13, and the second stop portion 131 is a stop surface disposed horizontally and upward. An opening 14 is concavely formed from the other side wall 112 corresponding to each of the receiving grooves 11, the opening 14 penetrates through the insulating body 1 vertically, the opening 14 is opposite to the recess 13 along the left-right direction, the receiving grooves 11 are in a shape with a wide middle and narrow two sides when seen from bottom to top (refer to fig. 10 in an auxiliary manner), after the terminals 2 are mounted in the receiving grooves 11, the front and rear ends of the terminals 2 are limited, so that the terminals 2 cannot excessively deflect in the left-right direction in the corresponding receiving grooves 11 when being stressed, and the terminals 2 are stably limited in the corresponding receiving grooves 11; and the periphery of the terminal 2 is not covered by too much insulating material, so that the transmission loss of the terminal 2 in the process of transmitting signals is reduced. The first stop portion 121 and the second stop portion 131 are vertically offset and longitudinally offset.

As shown in fig. 4, 5 and 10, the plurality of terminals 2 are correspondingly accommodated in the plurality of accommodating grooves 11, the terminals 2 are assembled in the corresponding accommodating grooves 11 in the up-down direction, and in this embodiment, the terminals 2 are assembled in the corresponding accommodating grooves 11 upward. The size of each of the terminals 2 in the front-rear direction is larger than the size in the left-right direction, a plurality of the ground terminals 2G are provided around each of the signal terminals 2S, and the size of the signal terminals 2S in the front-rear direction is smaller than the size of the ground terminals 2G in the front-rear direction. The plurality of the terminals 2 of one column are arranged in the front-rear direction, and in this column, the distance between the signal terminal 2S and the ground terminal 2G adjacent to one side is smaller than the distance between the ground terminals 2G adjacent to the other side, so that the crosstalk problem in the process of transmitting the high frequency signal can be improved.

As shown in fig. 1, 2 and 8, the terminals 2 are formed by blanking metal plates having the same thickness, each of the terminals 2 has a connecting arm 21, a contact portion 22 connected to one end of the connecting arm 21, a conductive portion 23 connected to the other end of the connecting arm 21, and an extension arm 24 connecting the contact portion 22 and the conductive portion 23, wherein the contact portion 22 protrudes upward from the receiving groove 11 for electrically connecting with the first mating member 200, and the conductive portion 23 protrudes downward from the receiving groove 11 for electrically connecting with the second mating member 300.

As shown in fig. 2, 9 and 11, each of the terminals 2 includes a first conductive path L1 and a second conductive path L2, wherein the first conductive path L1 passes through the contact portion 22, the connection arm 21 and the conductive connection portion 23, the second conductive path L2 passes through the contact portion 22, the extension arm 24 and the conductive connection portion 23, the connection arm 21 forms a limiting portion 212a on the first conductive path L1, the extension arm 24 forms a biasing portion 243 on the second conductive path L2, the biasing portion 243 is formed by bending a part of the extension arm 24 relative to a plate surface where the other part of the extension arm 24 is located, and the biasing portion 243 and the limiting portion 212a are vertically offset and vertically offset. In the process of assembling the terminal 2 into the receiving groove 11, the biasing portion 243 is pressed to be able to be offset toward the opening 14 properly, after the terminal 2 is assembled into the receiving groove 11, the limiting portion 212a is located below the first blocking portion 121 and is blocked upward, the biasing portion 243 is restored to protrude into the corresponding recess 13 and is located above the second blocking portion 131 and is blocked downward (refer to fig. 7 in an auxiliary manner), so that the terminal 2 is limited to the corresponding receiving groove 11, and thus the terminal 2 is arranged to be easily mounted on the insulating body 1; the terminal 2 has two paths for transmitting electric signals, which can reduce the electrical impedance and self-inductance effect of the terminal 2, improve the capability of the electric connector 100 for transmitting high-frequency signals, and meet the requirement of high-frequency signal transmission between the first butting piece 200 and the second butting piece 300; the terminal 2 is not additionally provided with a fixing structure which is clamped with the insulating body 1 in an interference way outside the conductive path, so that an antenna effect is avoided.

As shown in fig. 2, 8 and 9, the extension arm 24, the connection arm 21, the contact portion 22 and the conductive portion 23 enclose a through groove 25, and the through groove 25 extends continuously between the contact portion 22 and the conductive portion 23, so as to avoid the first conductive path L1 and the second conductive path L2 from shorting to each other, thereby increasing the strength of the terminal 2, and facilitating the elastic deformation of the terminal 2 when the terminal is pressed by the first abutting part 200 and the second abutting part 300.

As shown in fig. 2, 4 and 10, the connecting arm 21 includes a base 211, an upper elastic arm 212 connecting the base 211 and the contact portion 22, and a lower elastic arm 213 connecting the base 211 and the guide portion 23, wherein the base 211 is located behind the biasing portion 243 and is disposed at a front-rear interval. In this embodiment, the upper elastic arm 212 is formed by extending obliquely forward and upward from the base 211, the lower elastic arm 213 is formed by extending obliquely forward and downward from the base 211, the upper elastic arm 212 is provided with the limit portion 212a, and in this embodiment, the upper elastic arm 212 is formed with the limit portion 212a at one end connected to the base 211.

As shown in fig. 2, 4 and 7, the connecting arm 21 includes a first arm 241 connecting the contact portion 22 and the offset portion 243, and a second arm 242 connecting the offset portion 243 and the guide portion 23, and the offset portion 243 is located at the rear of the contact portion 22 and the guide portion 23, in this embodiment, the offset portion 243 is in an arc shape and exceeds a semicircle, and in other embodiments, the offset portion 243 may be in other shapes, as long as the offset portion 243 and the limit portion 212a are vertically offset and vertically offset.

As shown in fig. 2 and 10, the width of the upper elastic arm 212 gradually decreases from the base 211 to the contact portion 22, the width of the lower elastic arm 213 gradually decreases from the base 211 to the guide portion 23, the width of the first arm 241 gradually decreases from the biasing portion 243 to the contact portion 22, and the width of the second arm 242 gradually decreases from the biasing portion 243 to the guide portion 23, which is advantageous for elastic deformation of the terminal 2 when the first butt joint 200 is pressed down against the contact portion 22, and the width referred to herein is a dimension in a plate thickness direction perpendicular to the terminal 2.

In summary, the electrical connector of the present invention has the following advantages:

(1) The first stop portion 121 and the second stop portion 131 in the accommodating groove 11 are vertically offset and vertically offset from each other; the contact portion 22, the connection arm 21 and the conductive connection portion 23 of the terminal 2 are arranged as the first conductive path L1, the contact portion 22, the extension arm 24 and the conductive connection portion 23 of the terminal 2 are arranged as the second conductive path L2, the connection arm 21 forms a limit portion 212a on the first conductive path L1, the extension arm 24 forms a bias portion 243 on the second conductive path L2, the bias portion 243 and the limit portion 212a are arranged in a vertically staggered and front-back staggered manner, the limit portion 212a is located below the first stop portion 121 and is stopped upwards, the bias portion 243 is located above the second stop portion 131 and is stopped downwards, so that the terminal 2 is easy to install and can be stably limited in the corresponding containing groove 11, in addition, the terminal 2 is not additionally provided with a fixing structure which is in a clamping manner with the insulating body 1 outside the conductive path, the bias portion 243 and is capable of avoiding interference between the first conductive path and the second conductive path, the high frequency signal transmission device 200 and the high-frequency signal transmission device can meet the high-frequency signal transmission requirements of the terminal 2, and the high-frequency signal transmission device 200 can be satisfied.

(2) The grooves 13 and the openings 14 are formed in the corresponding concave manner in the accommodating grooves 11, so that the accommodating grooves 11 are in a shape with a wide middle and narrow two sides, and after the terminals 2 are installed in the corresponding accommodating grooves 11, the front and rear ends of the terminals 2 are limited, so that the terminals 2 cannot excessively swing in the left and right directions in the corresponding accommodating grooves 11 when being stressed, and are stably limited in the corresponding accommodating grooves 11; and the periphery of the terminal 2 is not covered by too much insulating material, so that the transmission loss of the terminal 2 in the process of transmitting signals is reduced.

(3) The plurality of the terminals 2 of one column are arranged in the front-rear direction, and in this column, the distance between the signal terminal 2S and the ground terminal 2G adjacent to one side is smaller than the distance between the ground terminals 2G adjacent to the other side, so that the crosstalk problem in the process of transmitting the high frequency signal can be improved.

(4) The extension arm 24, the connection arm 21, the contact portion 22 and the conductive portion 23 enclose to form a through groove 25, and the through groove 25 extends continuously between the contact portion 22 and the conductive portion 23, so as to prevent the first conductive path L1 and the second conductive path L2 from shorting to each other, thereby increasing the strength of the terminal 2, and being not easy to cause elastic deformation of the terminal 2 when being pressed by the first abutting part 200 and the second abutting part 300.

(5) The connecting arm 21 includes a first arm 241 connecting the contact portion 22 and the biasing portion 243, and a second arm 242 connecting the biasing portion 243 and the conductive portion 23, the width of the upper elastic arm 212 gradually decreases from the base 211 to the contact portion 22, the width of the lower elastic arm 213 gradually decreases from the base 211 to the conductive portion 23, the width of the first arm 241 gradually decreases from the biasing portion 243 to the contact portion 22, and the width of the second arm 242 gradually decreases from the biasing portion 243 to the conductive portion 23, so that elastic deformation of the terminal 2 is facilitated when the first butt joint 200 is pressed down against the contact portion 22.

(6) The terminal 2 is a metal plate blanking structure, the biasing portion 243 is formed by bending a part of the extension arm 24 relative to a plate surface where the other part of the extension arm 24 is located, and a part of the upper elastic arm 212 is the limiting portion 212a, so that the manufacture of the terminal 2 is simplified.

The above detailed description is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, therefore, all changes that may be made in the equivalent technology using the present specification and illustrations are intended to be included in the scope of the invention.

Claims

1. An electrical connector, comprising:

the insulation body is provided with at least one accommodating groove, the accommodating groove penetrates through the insulation body up and down, a first stop part and a second stop part are arranged in the accommodating groove of the insulation body, and the first stop part and the second stop part are arranged in a staggered manner up and down and front and back;

the terminal comprises a connecting arm, a contact part connected with one end of the connecting arm, a guide connection part connected with the other end of the connecting arm and an extension arm connected with the contact part and the guide connection part, wherein the contact part protrudes upwards out of the accommodating groove, the guide connection part protrudes downwards out of the accommodating groove, the terminal comprises a first conductive path and a second conductive path, the first conductive path passes through the contact part, the connecting arm and the guide connection part, the second conductive path passes through the contact part, the extension arm and the guide connection part, the connecting arm forms a limiting part on the first conductive path, the extension arm forms a biasing part on the second conductive path, the biasing part and the limiting part are arranged in a staggered mode from top to bottom, the limiting part is located below the first blocking part and is blocked upwards, the biasing part is located above the second blocking part and is located below the corresponding to the accommodating groove.

2. The electrical connector of claim 1, wherein: the terminal is of a sheet metal blanking forming structure, and the biasing portion is formed by bending one part of the extension arm relative to the plate surface where the other part of the extension arm is located.

3. The electrical connector of claim 1, wherein: the extension arm comprises a first arm connected with the contact part and the offset part and a second arm connected with the offset part and the guide connection part, and the offset part is positioned behind the contact part and the guide connection part.

4. The electrical connector of claim 3, wherein: the offset portion is arc-shaped, and the terminal is assembled in the corresponding accommodating groove in the up-down direction.

5. The electrical connector of claim 1, wherein: the connecting arm comprises a base part, an upper elastic arm connected with the base part and the contact part, and a lower elastic arm connected with the base part and the guide connection part, the limiting part is arranged on the upper elastic arm or the lower elastic arm, the base part is positioned behind the biasing part, and the base part and the lower elastic arm are arranged at intervals.

6. The electrical connector of claim 5, wherein: the upper elastic arm extends forwards and upwards in an inclined mode from the base part, and the limiting part is formed at one end, connected with the base part, of the upper elastic arm.

7. The electrical connector of claim 6, wherein: the first stopping part is a stopping surface which is inclined and is downwards arranged.

8. The electrical connector of claim 5, wherein: the second stop part is a stop surface which is horizontal and is arranged upwards.

9. The electrical connector of claim 5, wherein: the terminal is a sheet metal blanking forming structure with the same plate thickness, the extension arm comprises a first arm connected with the contact part and the offset part and a second arm connected with the offset part and the guide connection part, the width of the upper elastic arm gradually decreases from the base part to the contact part, the width of the lower elastic arm gradually decreases from the base part to the guide connection part, the width of the first arm gradually decreases from the offset part to the contact part, and the width of the second arm gradually decreases from the offset part to the guide connection part.

10. The electrical connector of claim 1, wherein: the size of each terminal in the front-rear direction is larger than that of each terminal in the left-right direction, the electric connector comprises a plurality of terminals, each terminal comprises at least one signal terminal and a plurality of grounding terminals, the periphery of each signal terminal is provided with the grounding terminals, and the size of each signal terminal in the front-rear direction is smaller than that of each grounding terminal in the front-rear direction.

11. The electrical connector of claim 10, wherein: the plurality of terminals are arranged in a plurality of rows, wherein the plurality of terminals of one row are arranged in the front-rear direction, and in the row, the distance between the signal terminal and the ground terminal adjacent to one side is smaller than the distance between the signal terminal and the ground terminal adjacent to the other side.

12. The electrical connector of claim 1, wherein: the accommodating groove is provided with two end walls which are oppositely arranged in the front-back direction and two side walls which are oppositely arranged in the left-right direction, one side wall is concavely arranged in the left-right direction to form a groove, the groove upwards penetrates through the insulating body, and the bottom surface of the groove forms the second stop part.

13. The electrical connector of claim 12, wherein: corresponding to each containing groove, the insulating body is provided with a convex part which is formed by protruding from the end wall positioned at the rear side forwards towards the containing groove, the convex part is connected with the two side walls, and the bottom surface of the convex part forms the first stop part.

14. The electrical connector of claim 12, wherein: the other side wall is concavely arranged along the left-right direction to form an opening, the opening penetrates through the insulating body up and down, and the opening is opposite to the groove along the left-right direction.

15. The electrical connector of claim 1, wherein: the extension arm, the connecting arm, the contact portion and the guide portion enclose to form a through groove, and the through groove extends continuously between the contact portion and the guide portion.