CN213304457U

CN213304457U - Electrical connector

Info

Publication number: CN213304457U
Application number: CN202020783477.2U
Authority: CN
Inventors: 许卫星
Original assignee: Triumph Precision Electronics Suzhou Co ltd
Current assignee: Triumph Precision Electronics Suzhou Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-05-28
Anticipated expiration: 2030-05-06

Abstract

The utility model discloses an electric connector, which is provided with a first pressing part and two second pressing parts protruding towards the insulating body on the upper cover, wherein the two second pressing parts are respectively positioned at the left side and the right side of the first pressing part, and the first pressing part is close to the insulating body relative to the second pressing parts; the insulating body is provided with a third pressing part and two fourth pressing parts, the two fourth pressing parts are respectively positioned on the left side and the right side of the third pressing part, and the two fourth pressing parts are far away from the upper cover relative to the third pressing part; when the upper cover is covered on the insulating body in a pressing mode, the first pressing portion is abutted to the third pressing portion, and the second pressing portion is at least partially abutted to the fourth pressing portion, so that the problem that the contact between the terminals of the upward arching portion of the insulating body and the circuit board is poor is solved.

Description

Electrical connector

[ technical field ] A method for producing a semiconductor device

The present invention relates to an electrical connector, and more particularly to an electrical connector fixed on a circuit board.

[ background of the invention ]

The existing electric connector fixed on the circuit board mainly comprises an insulating body 2 ', a plurality of terminals are arranged along the left and right direction and are fixedly held on the insulating body 2 ', wherein, the terminals comprise a fixing part positioned in the insulating body 2 ', and a contact arm is extended for electrically abutting with the circuit board, an upper cover 1 ' is arranged above the insulating body 2 ', the inner surface of the upper cover 1 ' is provided with at least one strip convex rib 11 ' which protrudes downwards, and the left and right sides of the upper cover 1 ' are pressed on the upper parts of the left and right sides of the insulating body 2 ' through an external pressing part such as a screw, thereby the electric connector is firmly fixed on the circuit board; however, the following problems are involved in the fixing process of the electrical connector: when the upper cover 1 'is covered on the insulating body 2', the long-strip convex rib 11 'will be abutted against the upper surface of the insulating body 2', during the process of locking the screw thread of the upper cover 1 ', because the long-strip convex rib 11' is already abutted against the upper surface of the insulating body 2 ', the part of the left and right sides of the upper cover 1' which is not provided with the long-strip convex rib 11 'will continuously receive downward pressure to correspondingly press the left and right sides of the insulating body 2', and further the terminal contact arms which are fixedly held in the left and right sides of the insulating body 2 'are compressed downward, but because the contact arms are elastic structures, the contact arms will provide a positive force opposite to the pressure direction, the positive force drives the fixing part to move upward, because the fixing part is located in the insulating body 2', the fixing part will drive the insulating body 2 'to move upward, because the upward positive force generated by the terminals at the left and right sides of the insulating body 2' is offset by the downward pressure, the terminal 31 ' farther away from the two sides of the insulating body 2 ' (i.e., closer to the middle of the insulating body 2 ') is pressed downward and tends to decrease gradually, but the middle of the insulating body 2 ' is still driven by the positive force of the terminal 32 ' located at the two sides of the insulating body to move upward, so as shown in fig. 1, the middle of the insulating body 2 ' is arched upward and the two sides approach the surface of the circuit board, which results in the contact arm of the terminal 31 ' in the middle area of the insulating body being away from the surface of the circuit board and not being able to make effective contact, thus easily causing the phenomena of disconnection and unstable signal transmission of the electrical connector.

Therefore, there is a need for a new electrical connector that overcomes the above problems.

[ Utility model ] content

An object of the creation of the utility model is to provide an electric connector, through establishing first splenium and second splenium at the upper cover, third splenium and fourth splenium are established to insulator, when upper cover gland in insulator, first splenium and third splenium butt, second splenium and fourth splenium part butt to solve insulator middle part and upwards encircle the problem that leads to the unable contact circuit board of partial terminal.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an electrical connector, comprising:

an insulating body; the plurality of terminals are arranged in a row along the left-right direction and are fixedly held on the insulating body;

the upper cover is provided with a first pressing part and two second pressing parts, the first pressing part and the two second pressing parts protrude towards the insulation body, the two second pressing parts are respectively positioned at the left side and the right side of the first pressing part, and the first pressing part is close to the insulation body relative to the second pressing parts;

the insulation body is provided with a third pressing part and two fourth pressing parts, the two fourth pressing parts are respectively positioned on the left side and the right side of the third pressing part, and the two fourth pressing parts are far away from the upper cover relative to the third pressing part;

when the upper cover is covered on the insulating body in a pressing mode, the first pressing portion is abutted to the third pressing portion, and the second pressing portion is at least partially abutted to the fourth pressing portion.

Furthermore, a first transition section is arranged between each second pressing part and each first pressing part, and the second pressing part, the first transition section, the first pressing part and the second pressing part continuously extend in sequence; a second transition section is arranged between each fourth pressing part and each third pressing part, and the fourth pressing part, the second transition section, the third pressing part and the fourth pressing part continuously extend in sequence.

The first pressing portions are arranged at intervals in the front-rear direction, the second pressing portions are arranged at intervals in the front-rear direction, the two second pressing portions located on the same side of the two first pressing portions are arranged at intervals in the front-rear direction, the third pressing portions are arranged at intervals in the front-rear direction, the two third pressing portions are arranged at intervals in the front-rear direction, the four fourth pressing portions are arranged at intervals in the front-rear direction, an accommodating groove is located between the two third pressing portions and between the two fourth pressing portions, and a grounding piece extends in the left-right direction and is located in the accommodating groove.

Furthermore, the electric connector is respectively and electrically connected with two circuit boards on the same plane, the two first pressing parts are respectively and correspondingly positioned above the two circuit boards, and the projection of the grounding part along the vertical direction is positioned between the two circuit boards.

Furthermore, a slot extending along the left-right direction is formed between the two first pressing portions, the plurality of ribs are located in the slot, the grounding piece is correspondingly provided with a plurality of concave portions for respectively accommodating the plurality of ribs, and the bottom of each rib is in contact with the bottom of each concave portion.

Furthermore, the plurality of terminals include a ground terminal and a signal terminal, each of the ground terminal and the signal terminal has a fixing portion fixed in the insulating body, the fixing portion has a slot, the slot is communicated with the receiving slot, the ground member has a plurality of ground portions extending away from the upper cover, and one of the ground portions is correspondingly located in the slot of one of the ground terminals.

Furthermore, a plurality of bumps are arranged at intervals in the accommodating groove, the bumps are positioned in the clamping grooves of each signal terminal, a press-connection part is arranged between the two grounding parts, the press-connection part is abutted against the bumps, and the bottoms of the press-connection part and the grounding parts are respectively provided with a conical guide part.

Furthermore, the insulation body extends in a longitudinal shape along the left-right direction, the insulation body is provided with a plurality of terminal grooves along the left-right direction to correspondingly accommodate the terminals, the terminal grooves are spaced by a plurality of spacing ribs, the spacing ribs comprise first spacing ribs located in the middle of the insulation body and second spacing ribs located on the left side and the right side of the first spacing ribs, the third pressing portions are correspondingly located on the first spacing ribs, the fourth pressing portions are correspondingly located on the second spacing ribs, and the two second spacing ribs are far away from the upper cover relative to the first spacing ribs.

Furthermore, a first contact surface is arranged between the first pressing part and the first spacing rib, a second contact surface is arranged between each second pressing part and the corresponding second spacing rib, and the first contact surface is larger than any one of the second contact surfaces.

Furthermore, the left side and the right side of the electric connector are fixed through at least one external pressing piece respectively, and the projection of the first pressing part along the left-right direction is at least partially overlapped with the projection of the external pressing piece along the left-right direction.

Compared with the prior art, the utility model discloses following beneficial effect has: through being equipped with a first splenium and being located a second splenium of first splenium left and right sides respectively at the upper cover, be equipped with a third splenium and be located a fourth splenium of third splenium left and right sides respectively at insulator, when the upper cover lid was on insulator, first splenium will be down butt third splenium, and the second splenium will be down with the partial butt of fourth splenium to solve insulator and upwards bow up partial terminal and the bad problem of circuit board contact.

[ description of the drawings ]

Fig. 1 is a schematic view of an electrical connector in the prior art, in which a terminal upwardly drives a middle portion of an insulating body to upwardly arch in a screw locking process;

fig. 2 is an exploded perspective view of the electrical connector of the present embodiment;

FIG. 3 is a perspective view of the assembled electrical connector of the present embodiment;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a partial cross-sectional view taken along line B-B of FIG. 3;

FIG. 6 is a partial cross-sectional view taken along line C-C of FIG. 3;

FIG. 7 is an enlarged view of FIG. 6 at D;

FIG. 8 is a schematic diagram illustrating a process of locking the screws of the electrical connector according to the present embodiment;

FIG. 9 is a schematic view of the upper cover covering the insulating body after locking the screw in the present embodiment;

FIG. 10 is an enlarged schematic view at E of FIG. 8;

fig. 11 is a top cross-sectional view of the electrical connector of the present embodiment after the screw is locked and the cover and the body are pressed together;

detailed description of the embodiments reference is made to the accompanying drawings in which:

electrical connector 100	Upper cover 1	Top 11	Bottom 12
				First pressing part 13	Second pressing part 14	First transition section a	Open slot 15
Ribs 16	Insulating body 2	Top surface 21	Bottom surface 22
				Terminal groove 23	First spacer ribs 24	Second partition ribs 25	Third pressing part 26
Fourth pressing part 27	Second transition section b	Receiving groove	28					Bump 29
				Grounding terminal 3	Fixing part 31	Substrate 311	Catch arm 312
Convex part 313	Card slot 314	First segment 315	Second segment 316
				Contact 317	Signal terminal 4	Grounding piece 5	Base 51
Recess 52	Grounding part 53	Crimping part 54	Guide part 55
				Circuit board 6	Clearance c	First contact surface d	Second contact surface e

[ detailed description ] embodiments

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated position or component must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 2 and 3, the electrical connector 100 of the present invention is adapted to electrically connect two separated circuit boards 6 (of course, in other embodiments, it can also be used to electrically connect one circuit board 6 or a plurality of circuit boards 6, where the number of the circuit boards 6 is not limited), wherein two circuit boards 6 are arranged at intervals along the front-back direction, and each upper surface of two circuit boards 6 is provided with a plurality of electrical contacts (not numbered), and the electrical connector 100 includes an upper cover 1, an insulating body 2 and a plurality of terminals.

As shown in fig. 2-7, the upper cover 1 is disposed on the insulating body 2, the upper cover 1 is elongated along the left-right direction, the upper cover 1 includes a bottom 12 close to the insulating body 2 and a top 11 far away from the insulating body 2, and two first pressing portions 13 and four second pressing portions 14 protruding toward the insulating body 2 are disposed on the bottom 12 of the upper cover 1; in this embodiment, the two first pressing portions 13 are located in the middle of the bottom portion 12 and are arranged at intervals in the front-back direction, the two first pressing portions 13 are respectively located above the two circuit boards 6, the two second pressing portions 14 are respectively located at the left and right sides of one first pressing portion 13, each first pressing portion 13 is closer to the insulating body 2 than the two second pressing portions 14 at the two sides, the two second pressing portions 14 located at the same side of the two first pressing portions 13 are spaced in the front-back direction, and a first transition section a extending obliquely away from the bottom portion 12 is arranged between each second pressing portion 14 and each first pressing portion 13, so that the bottom portion 12 of the upper cover 1 is provided with two arc-shaped protruding structures from left to right, and each arc-shaped structure sequentially presses the second pressing portion 14, the first transition section a, and the second transition section a, The first pressing part 13 and the second pressing part 14 extend continuously in sequence (the two arc-shaped protruding structures are spaced along the front-back direction), preferably, in the embodiment, the protruding height L1 of the first pressing part 13 is greater than the plate edge thickness L2 of the upper cover 1; in addition, a slot 15 extending along the left-right direction is formed between the two first pressing parts 13, the slot 15 extends to the position between the two second pressing parts 14 spaced front and back, and a plurality of ribs 16 are positioned in the slot 15.

As shown in fig. 2, 5, 6 and 11, the insulative housing 2 extends lengthwise in the left-right direction, the insulative housing 2 includes a top surface 21 and a bottom surface 22 contacting with the upper surfaces of the two circuit boards 6, the insulative housing 2 is opened with a plurality of terminal slots 23 penetrating the top surface 21 in the left-right direction to accommodate a plurality of terminals, a plurality of spacing ribs space the terminal slots 23 apart, the spacing ribs include a first spacing rib 24 located at the middle of the insulative housing 2 and a second spacing rib 25 located at the left and right sides of the first spacing rib 24, as shown in fig. 6 and 10, the height of the first spacing rib 24 extending upward (i.e. extending close to the upper cover 1) is preferably higher than the height of the second spacing rib 25 at the left and right sides, and in this embodiment, the height of the plurality of spacing ribs gradually decreases from the middle of the insulative housing 2 to the left and right sides, therefore, a height difference L3 is formed between the first partition rib 24 and the partition ribs at the left and right ends of the insulating body 2, the top surface 21 has two third pressing portions 26 and four fourth pressing portions 27, the two third pressing portions 26 are located in the middle of the insulating body 2 and are arranged at intervals in the front-rear direction, the two second pressing portions 14 are located at the left and right sides of one third pressing portion 26, each third pressing portion 26 is closer to the upper cover 1 than the two fourth pressing portions 27 at the two sides, the two fourth pressing portions 27 located at the same side of the two third pressing portions 26 are spaced in the front-rear direction, the third pressing portion 26 is located on the top surface of the first partition rib 24, the two fourth pressing portions 27 located at the left and right sides of the third pressing portion 26 are correspondingly located on the top surfaces of the two second partition ribs 25, and a second pressing portion extending obliquely toward the bottom 12 is located between each fourth pressing portion 27 and each third pressing portion 26 The transition section b forms an arc-shaped protruding structure from left to right of the insulation body 2, the arc-shaped structure continuously extends in sequence according to the order of the fourth pressing portion 27, the second transition section b, the third pressing portion 26 and the fourth pressing portion 27, further, an accommodating groove 28 extending along the left-right direction is formed between the two third pressing portions 26, the accommodating groove 28 extends to the position between the two fourth pressing portions 27 spaced front and back, and in addition, as shown in fig. 9, a gap c gradually increasing is formed between the second pressing portion 14 and the non-contact portion of the fourth pressing portion 27 corresponding to the lower portion thereof along the direction close to the left-right side end of the insulation body 2.

As shown in fig. 2 and 4, the plurality of terminals include a plurality of ground terminals 3 and a plurality of signal terminals 4, the ground terminals 3 and the signal terminal pairs composed of two signal terminals 4 are arranged alternately, each of the ground terminals 3 and the signal terminals 4 has a fixing portion 31, the fixing portion 31 is positioned in the insulating body 2, specifically, the fixing portion 31 includes a base 311 and two holding arms 312 extending symmetrically from the base 311 upwards, a slot 314 is formed between the two holding arms 312, furthermore, two protrusions 313 protruding in the left-right direction to be held by the insulating body 2 are formed on the outer side of each holding arm 312, further, each base 311 extends a contact arm (not shown) along the left-right direction side portion, each contact arm has a first section 315, the first section 315 extends obliquely in a direction away from the two circuit boards 6, a second section 316 (i.e., the second section 316 is C-shaped) bent downward from the first section 315 and extending toward the direction close to the card slot 314, a contact portion 317 is located on the bottom surface of the second section 316, the two contact portions 317 are respectively used for electrically connecting contacts on two circuit boards 6 located on the same plane, the receiving slot 28 is communicated with the card slot 314, wherein a plurality of bumps 29 are located in the receiving slot 28 at intervals, and one bump 29 is held in the card slot 314 of two signal terminals 4.

As shown in fig. 2 and 5, the receiving slot 28 is used for receiving a grounding member 5 extending along the left-right direction, and in this embodiment, the projection of the grounding member 5 along the up-down direction is located between the two circuit boards 6. The grounding member 5 includes a base 51 and a plurality of grounding portions 53 extending perpendicularly from the base 51 to a position away from the bottom 12, one of the grounding portions 53 is held in the slot 314 of one of the grounding terminals 3, a press-connecting portion 54 is provided between two grounding portions 53, the press-connecting portion 54 is held against the bump 29, a tapered guiding portion 55 is provided at the bottom of each of the grounding portions 53 and the press-connecting portions 54 so as to guide the grounding member 5 to be inserted into the receiving slot 28, a plurality of recesses 52 are recessed in an upper surface of the base 51, one of the recesses 52 correspondingly receives one of the ribs 16, and a lower surface of the rib 16 contacts a lower surface of the recess 52.

In addition, as shown in fig. 2, each of the left and right sides of the upper cover 1 is fixed on two circuit boards 6 by two screws (not shown) spaced back and forth, one of the two screws spaced back and forth is correspondingly located on one circuit board 6 (that is, one screw is located on each of the left and right sides of the first pressing portion 13), wherein a projection of the first pressing portion 13 along the left and right directions coincides with a projection of the two screws located on the left and right sides of the first pressing portion 13 along the left and right directions, so as to ensure that the first pressing portion 13 is stressed in a balanced manner during the process of locking the screws of the electrical connector 100.

For the sake of understanding, the following description is provided with reference to the following embodiments to explain the process of capping the insulating body 2 with the upper lid 1 according to the present invention:

when the screw is not locked, as shown in fig. 6 and 7, when the upper cover 1 is pressed on the insulating body 2, at this time, two first pressing portions 13 are correspondingly contacted with two third pressing portions 26, two second pressing portions 14 located at the left and right sides of each first pressing portion 13 are not contacted with two fourth pressing portions 27 located at the left and right sides of each third pressing portion 26, during the screw locking process, as shown in fig. 8, 9 and 10, two first pressing portions 13 are first forced to downwardly abut against two third pressing portions 26, so that each first pressing portion 13 and the corresponding first partition rib 24 have a first contact surface d, and two third pressing portions 26 are displaced downwardly by the downward acting force of the two first pressing portions 13 (the force with which the first pressing portions 13 abut against the third pressing portions 26 is greater than the force with which the terminal is compressed to generate an upward positive force), therefore, the middle of the insulating body 2 will be displaced toward the direction approaching the circuit board 6, and in addition, since the left and right sides of the upper cover 1 continuously receive downward pressure in the process of locking the screw, and the two first pressing portions 13 already abut against the two third pressing portions 26, the left and right sides of the two first pressing portions 13 will be deformed downward, that is, the two second pressing portions 14 (i.e., the two second pressing portions 14 spaced back and forth) located on the same side of the two first pressing portions 13 and the two fourth pressing portions 27 (i.e., the two second pressing portions 14 spaced back and forth) located on the same side of the two third pressing portions 26 are in partial contact, so that a second contact surface e is provided between each second pressing portion 14 and the second partition rib 25, the area of the first contact surface d is larger than that of the second contact surface e, thereby ensuring that the middle of the insulating body 2 is displaced downward and the terminals in the middle area of the insulating body 2 and the terminals thereof are in the middle area of the insulating body 2 The circuit board 6 is electrically connected effectively.

To sum up, the utility model discloses an electric connector 100 has following beneficial effect:

1. by providing the first pressing portion 13 and the second pressing portion 14 on the upper cover 1 and providing the third pressing portion 26 and the fourth pressing portion 27 on the insulating body 2, when the upper cover 1 is covered on the insulating body 2, since the first pressing portion 13 is closer to the insulating body 2 than the second pressing portion 14 and the third pressing portion 26 is closer to the insulating body 2 than the fourth pressing portion 27, during the process of locking the screw of the electrical connector 100, the first pressing portion 13 will first abut against the third pressing portion 26 downwards and the second pressing portion 14 will abut against the fourth pressing portion 27 to ensure that the middle area of the insulating body 2 can be subjected to the downward abutting force of the upper cover 1, so as to prevent the left and right sides of the insulating body 2 in the conventional electrical connector 100 from being subjected to the downward abutting force of the upper cover 1 first, and then the terminal located in the middle area of the insulating body 2 is driven upwards by the positive force to displace the middle of the insulating body 2 upwards.

2. The second pressing part 14, the first transition section a, the first pressing part 13 and the second pressing part 14 are sequentially and continuously arranged in an extending manner, and the fourth pressing part 27, the second transition section b, the third pressing part 26 and the fourth pressing part 27 are sequentially and continuously arranged in an extending manner; the upper cover 1 can transitionally press down the terminal in the middle area of the insulation body 2 by arranging the continuous first transition section a between the first pressing part 13 and the second pressing part 14 and arranging the continuous second transition section b between the third pressing part 26 and the fourth pressing part 27.

3. The first pressing portions 13 have two, the two first pressing portions 13 are arranged at intervals in the front-rear direction, the second pressing portions 14 have four, the two second pressing portions 14 located on the same side of the two first pressing portions 13 are arranged at intervals in the front-rear direction, the third pressing portions 26 have two, the two third pressing portions 26 are arranged at intervals in the front-rear direction, the fourth pressing portions 27 have four, and the two fourth pressing portions 27 located on the same side of the two third pressing portions 26 are arranged at intervals in the front-rear direction, so that the force of pressing the upper cover 1 against the insulating body 2 is more dispersed and stabilized, the grounding member 5 is placed in the accommodating groove 28 and located between the two circuit boards 6 along the projection in the up-down direction, the grounding member 5 not only can enhance the high-frequency action of the electrical connector 100, but also when the terminal is installed askew due to the unevenness of the two circuit boards 6, the first pressing portions 13 on both sides and the grounding member 5 simultaneously press the insulating body 2 to balance the electrical connector 100.

4. The open slot 15 extending along the left-right direction is opened between the two first pressing parts 13, the plurality of ribs 16 are positioned in the open slot 15, the grounding part 5 is correspondingly provided with a plurality of recesses 52 for respectively accommodating the plurality of ribs 16, and the bottom surfaces of the ribs 16 are contacted with the bottom surfaces of the recesses 52; when the upper cover 1 is pressed down against the insulating body 2, the rib 16 presses down against the recess 52 to displace the grounding piece 5 further downward against the terminal.

5. The grounding portion 53 is inserted into the slot 314 of the grounding terminal 3, so that the grounding member 5 presses down the plurality of grounding terminals 3, and the upward positive force generated by the elastic compression of the contact arm of the grounding terminal 3 is offset to a certain extent, the press-connection portion 54 abuts against the bump 29, so that the grounding member 5 presses down the plurality of signal terminals 4, and the upward positive force generated by the elastic compression of the contact arm of the signal terminals 4 is offset to a certain extent, and in addition, the bottom of the press-connection portion 54 and the bottom of the grounding portion 53 are both provided with the tapered guide portions 55, which not only facilitates guiding the insertion of the grounding member 5, but also increases the downward abutting force of the grounding member 5.

6. The third pressing portion 26 is correspondingly located on the first partition rib 24, the fourth pressing portion 27 is correspondingly located on the two second partition ribs 25, and the two second partition ribs 25 are far away from the upper cover 1 relative to the first partition rib 24, so that the first pressing portion 13 is ensured to be abutted against the middle area of the insulation body 2.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the invention, and all changes in the art which come within the meaning and range of equivalency of the specification and drawings are therefore intended to be embraced therein.

Claims

1. An electrical connector, comprising:

2. The electrical connector of claim 1, wherein: a first transition section is arranged between each second pressing part and each first pressing part, and the second pressing part, the first transition section, the first pressing part and the second pressing part continuously extend in sequence; a second transition section is arranged between each fourth pressing part and each third pressing part, and the fourth pressing part, the second transition section, the third pressing part and the fourth pressing part continuously extend in sequence.

3. The electrical connector of claim 1, wherein: the first pressing portions are arranged at intervals in the front-rear direction, the second pressing portions are arranged at intervals in the front-rear direction, the two second pressing portions located on the same side of the two first pressing portions are arranged at intervals in the front-rear direction, the third pressing portions are arranged at intervals in the front-rear direction, the four fourth pressing portions are arranged at intervals in the front-rear direction, the two fourth pressing portions located on the same side of the two third pressing portions are arranged at intervals in the front-rear direction, an accommodating groove is located between the two third pressing portions and between the two fourth pressing portions, and a grounding piece extends in the left-right direction and is located in the accommodating groove.

4. The electrical connector of claim 3, wherein: the electric connector is respectively and electrically connected with two circuit boards on the same plane, the two first pressing parts are respectively and correspondingly positioned above the two circuit boards, and the projection of the grounding part along the vertical direction is positioned between the two circuit boards.

5. The electrical connector of claim 3, wherein: a groove extending along the left-right direction is formed between the two first pressing portions, a plurality of ribs are positioned in the groove, a plurality of concave portions are correspondingly formed in the grounding piece to accommodate the ribs respectively, and the bottoms of the ribs are in contact with the bottoms of the concave portions.

6. The electrical connector of claim 3, wherein: the plurality of terminals comprise at least one grounding terminal and at least one signal terminal, the grounding terminal and the signal terminal are respectively provided with a fixing part fixed in the insulating body, the fixing part is provided with a clamping groove, the clamping groove is communicated with the accommodating groove, the grounding part is provided with a plurality of grounding parts extending away from the direction of the upper cover, and one grounding part is correspondingly positioned in the clamping groove of one grounding terminal.

7. The electrical connector of claim 6, wherein: the containing groove is provided with a plurality of convex blocks at intervals, the convex blocks are positioned in the clamping grooves of each signal terminal, a press-connection part is arranged between the two grounding parts and is abutted against the convex blocks, and the bottoms of the press-connection part and the grounding part are respectively provided with a conical guide part.

8. The electrical connector of claim 1, wherein: the insulation body extends in the left-right direction to be lengthwise, a plurality of terminal grooves are formed in the left-right direction of the insulation body to correspondingly accommodate the terminals, the terminal grooves are spaced by a plurality of spacing ribs, the spacing ribs comprise first spacing ribs located in the middle of the insulation body and second spacing ribs located on the left side and the right side of the first spacing ribs, the third pressing portion is correspondingly located on the first spacing ribs, the fourth pressing portion is correspondingly located on the second spacing ribs, and the two second spacing ribs are far away from the upper cover relative to the first spacing ribs.

9. The electrical connector of claim 8, wherein: a first contact surface is arranged between the first pressing part and the first spacing rib, a second contact surface is arranged between each second pressing part and the corresponding second spacing rib, and the first contact surface is larger than any one of the second contact surfaces.

10. The electrical connector of claim 1, wherein: the left side and the right side of the electric connector are fixed through at least one external pressing piece respectively, and the projection of the first pressing piece along the left-right direction is at least partially overlapped with the projection of the external pressing piece along the left-right direction.