CN211377085U - Electrical connector - Google Patents

Abstract

The utility model discloses an electric connector, include: the electronic component comprises an insulating body, a first insulating layer and a second insulating layer, wherein the insulating body is provided with a slot and two side walls positioned on two opposite sides of the slot, and the electronic component is inserted into the slot; the through holes penetrate through the side wall along the thickness direction of the insulating body, the two through holes are communicated with the slot, and a retaining wall is arranged between the two through holes; the plurality of terminals are arranged in a row, each terminal is respectively provided with a fixing part fixed on the insulating body, an elastic arm extends from one end of the fixing part and is exposed out of the slot, the elastic arms are electrically connected with the electronic element in a conduction mode, the plurality of terminals comprise at least two pairs of signal terminals and a grounding terminal positioned between the two pairs of signal terminals, the elastic arms of each pair of signal terminals are exposed out of the communication holes, the elastic arms of the grounding terminal are arranged on the retaining walls, the difference of dielectric constants between the signal terminals and the grounding terminal is increased, energy coupling between two adjacent signal terminals is enhanced, and two adjacent signal terminals can mutually promote and transmit the most energy together.

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 with improved high frequency performance.

[ background of the invention ]

An electrical connector is a medium for exchanging electronic signals between two electronic components, and a conventional electrical connector comprises an insulating housing, wherein the front surface of the insulating housing is recessed backwards to form a slot for an electronic component to be inserted, the upper side and the lower side of the slot are respectively provided with a side wall, each side wall is provided with a row of terminal grooves arranged at intervals, each terminal groove is provided with an opening communicated with the slot, the terminal groove is provided with a bottom surface opposite to the opening, and the bottom surface of any terminal groove is not provided with a through hole which penetrates through the outer surface of the side wall; two rows of terminals are respectively and correspondingly accommodated in the terminal grooves of the two side walls, each row of terminals comprises a plurality of pairs of signal terminals and a plurality of grounding terminals, one grounding terminal is arranged between two adjacent pairs of signal terminals so as to block crosstalk between the two adjacent pairs of signal terminals, each terminal is provided with a fixing part which is fixed in the insulating shell, and an elastic arm extends forwards from the fixing part and is exposed out of the slot so as to be butted with the electronic element.

However, in the conventional electrical connector, since no through hole is formed in the bottom surface of the terminal groove to communicate with the outside air, the periphery of the side surface of the terminal opposite to the bottom surface of the terminal groove is made of insulating plastic, and the dielectric constant of the insulating plastic is more than three times larger than that of air, so that the dielectric constant of the medium around the terminal is larger, which causes the impedance of the terminal to be larger, and is not favorable for the transmission of high-frequency signals; the structure of the terminal groove for accommodating the signal terminal and the terminal groove for accommodating the ground terminal are the same, the dielectric constants of the media around the signal terminal and the ground terminal are the same, and further, the impedances of the signal terminal and the ground terminal are the same, and the energy that can be transmitted between the signal terminal and the ground terminal is uniform, so that the signal energy cannot be transmitted by the signal terminal to the maximum.

Therefore, there is a need for a new electrical connector to overcome the above problems.

[ Utility model ] content

An object of the utility model is to provide an it makes signal terminal's elastic arm appear in to set up the intercommunicating pore at the surface of insulator lateral wall the intercommunicating pore, and ground terminal's elastic arm corresponds locates the barricade of lateral wall, thereby reduce signal terminal's impedance, and increase signal terminal with the difference of the dielectric constant between the ground terminal makes signal terminal transmits the electric connector of the most energy.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an electrical connector for receiving an electronic component, comprising: the electronic component comprises an insulating body, a first insulating layer and a second insulating layer, wherein the insulating body is provided with a slot and two side walls positioned on two opposite sides of the slot, and the electronic component is inserted into the slot; the through holes penetrate through the side wall along the thickness direction of the insulation body, the two through holes are communicated with the slot, and a retaining wall is arranged between the two through holes; the plurality of terminals are arranged in a row, each terminal is respectively provided with a fixing part which is fixedly held on the insulating body, and an elastic arm extends from one end of the fixing part and is exposed out of the slot, the elastic arm is electrically connected with the electronic element in a guiding mode, the plurality of terminals comprise at least two pairs of signal terminals and a grounding terminal positioned between the two pairs of signal terminals, the elastic arm of each pair of signal terminals is exposed out of the communicating hole, and the elastic arm of the grounding terminal is arranged on the retaining wall.

Furthermore, the elastic arm is provided with a contact part, the contact part is exposed from the slot and contacts with the electronic element, and the contact part is completely exposed from the communication hole.

Further, when the electronic component is inserted into the slot, the contact portion enters the communication hole.

Further, the pair of signal terminals includes a first signal terminal and a second signal terminal, the elastic arm of the first signal terminal has a first distance from the inner wall of the communication hole, the elastic arm of the second signal terminal has a second distance from the inner wall of the communication hole, and the first distance is equal to the second distance.

Further, a third distance is arranged between the free tail end of the elastic arm and the inner wall of the communication hole, and the third distance is larger than the first distance.

Further, the side wall is provided with a first terminal groove for accommodating the signal terminal and a second terminal groove for accommodating the ground terminal, a first barrier is arranged between every two adjacent first terminal grooves, the elastic arm is provided with a contact part for contacting with the electronic element, the first barrier is arranged between every two adjacent contact parts of the signal terminal, a second barrier is arranged between the first terminal groove and the second terminal groove, and the second barrier separates the signal terminal from the ground terminal.

Further, the first rail extends into the communication hole, the contact portions of two adjacent signal terminals and the first rail located therebetween are exposed to the same communication hole, and the free end of the first rail does not extend to the inner wall surface of the communication hole.

Further, the barricade with the surface of lateral wall flushes, the barricade with two the second jube encloses into jointly the second terminal groove.

Further, an insulating block is formed in the row of the terminals in an injection molding mode, the insulating block is assembled on the insulating body, a front-back direction is defined along the insertion direction of the electronic element, the front surface of the insulating block is located behind the bottom surface of the slot, and media around the elastic arm located between the bottom surface of the slot and the front surface of the insulating block are all air.

The other technical scheme is as follows: an electrical connector for receiving an electronic component, comprising: the electronic component comprises an insulating body, a first insulating layer and a second insulating layer, wherein the insulating body is provided with a slot and two side walls positioned on two opposite sides of the slot, the electronic component is inserted into the slot, each side wall is respectively provided with an inner wall surface and an outer wall surface, and the two inner wall surfaces face the slot; at least one communicating hole, wherein the communicating hole penetrates through the outer wall surface and is communicated with the slot; the plurality of terminals are arranged in a row, each terminal is respectively provided with a fixing part fixed on the insulating body and an elastic arm extending from one end of the fixing part and exposed out of the slot, the elastic arms are electrically connected with the electronic element in a guiding mode, the plurality of terminals comprise at least one signal terminal and at least one grounding terminal, the elastic arms of the signal terminals are exposed out of the communication holes and exposed out of the outer wall surface, and the elastic arms of the grounding terminals are not exposed out of the outer wall surface.

Compared with the prior art, the utility model discloses following beneficial effect has:

by providing the communication hole on the side wall, the communication hole penetrates through the outer wall surface of the side wall, the elastic arm of each pair of the signal terminals is exposed to the communication hole, the elastic arm of each signal terminal is exposed to the air in a large area through the communication hole, so that the impedance of the elastic arm part of each signal terminal is small, and the transmission of high-frequency signals is improved; and because the elastic arm of the grounding terminal is shielded by the retaining wall, the dielectric constant of the medium around the elastic arm of the grounding terminal is different from that of the medium around the elastic arm of the signal terminal, the difference of the dielectric constants between the signal terminal and the grounding terminal is increased, the energy coupling between two adjacent signal terminals is enhanced, and the two adjacent signal terminals can mutually promote and jointly transmit the most energy.

[ description of the drawings ]

Fig. 1 is a schematic perspective exploded view of the electrical connector of the present invention;

fig. 2 is a perspective assembly view of the electric connector of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a cross-sectional view A-A of FIG. 2;

FIG. 5 is an enlarged view of B in FIG. 4;

FIG. 6 is a right side view of FIG. 2;

fig. 7 is a state diagram of fig. 6 after the electronic component is inserted.

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

[ detailed description ] embodiments

For better understanding of the objects, structures, features, and functions of the present invention, reference should now be made to the drawings and detailed description of the invention.

Referring to fig. 1, 2 and 7, an electrical connector 100 of the present invention is provided for an electronic component 200 to be inserted and mounted on a mounting surface of a circuit board (not shown). The electrical connector 100 includes: an insulating body 1; two rows of terminals 2 are respectively and correspondingly accommodated in the insulating body 1, the front end of each terminal 2 contacts the electronic element 200, the rear end of each terminal is correspondingly welded on the circuit board so as to electrically connect the electronic element 200 with the circuit board, the plugging direction of the electronic element 200 is defined as the front-back direction, the thickness direction of the insulating body 1 is defined as the up-down direction, and the left-right direction is perpendicular to the front-back direction and the up-down direction.

Referring to fig. 1, 4 and 6, the insulating body 1 is elongated and formed by integrally molding insulating plastic, and has a front surface 11 and a rear surface 12, a slot 13 is recessed from the front surface 11, the electronic component 200 (see fig. 7) is inserted into the slot 13, the insulating body 1 has two side walls 14 located at the upper and lower sides of the slot 13, and two opposite end walls 15 located at the left and right sides of the slot 13, the two side walls 14 and the two end walls 15 together enclose the slot 13, each side wall 14 has an inner wall surface 141 and an outer wall surface 142, the two inner wall surfaces 141 face the slot 13, the two outer wall surfaces 142 are the upper and lower surfaces of the insulating body 1, each side wall 14 has a plurality of first terminal grooves 143 and a plurality of second terminal grooves 144, a plurality of the first terminal grooves 143 and a plurality of the second terminal grooves 144 are arranged in a row at intervals, one second terminal groove 144 is provided every two first terminal grooves 143, each first terminal groove 143 and each second terminal groove 144 are formed to be recessed from the inner wall surface 141 toward the outer wall surface 142, the first terminal groove 143 and the second terminal groove 144 do not penetrate the outer wall surface 142, the first terminal groove 143 and the second terminal groove 144 are communicated with the insertion groove 13, a first barrier 145 is provided between adjacent two first terminal grooves 143, the first barrier 145 is formed to extend backward from a front end of the first terminal groove 143, adjacent two first terminal grooves 143 are communicated with each other at a rear side of the first barrier 145, a second barrier 146 is provided between the first terminal groove 143 and the second terminal groove 144, the second barrier 146 has a length greater than that of the first barrier 145 to completely separate the first terminal groove 143 from the second terminal groove 144 in the left-right direction.

Referring to fig. 2 and 6, a plurality of communication holes 16 penetrate through the outer wall 142 and the bottom surfaces of the first terminal grooves 143 in the vertical direction, the communication holes 16 are rectangular, each communication hole 16 is communicated with two adjacent first terminal grooves 143 and further communicated with the slot 13, the first barrier 145 between two adjacent first terminal grooves 143 is also completely exposed from the corresponding communication hole 16, the first barrier 145 extends into the communication hole 16 in the vertical direction, the free end of the first barrier 145 does not extend backwards to the inner wall of the communication hole 16, a retaining wall 17 is spaced between two adjacent communication holes 16, the retaining wall 17 is flush with the outer wall 142 of the side wall 14, and each retaining wall 17 and two second barriers 146 together form one second terminal groove 144.

Referring to fig. 1, 3 and 4, three protrusions 18 are disposed at intervals in the slot 13, the slot 13 is divided into four parts, each protrusion 18 is connected to two side walls 14 at two sides of the slot 13, and the widths of the three protrusions 18 are different, when the electronic component 200 is inserted into the slot 13, the electronic component 200 can be inserted only in a single direction, so as to prevent the electronic component 200 from being inserted reversely, three metal members 3 are respectively and fixedly disposed on the surfaces of the three protrusions 18, so as to cover the front surface 11 and the two opposite side surfaces of the protrusion 18, so as to prevent the electronic component 200 from scraping the surfaces of the protrusions 18 when the electronic component 200 is inserted into the slot 13, a through hole 19 is disposed at a position of the insulating body 1 corresponding to each protrusion 18 and two end walls 15, and the through hole 19 penetrates through the upper portion of the insulating body 1, And five fixing members 4 are respectively and correspondingly fixed to the through holes 19, and the lower ends of the fixing members 4 extend out of the lower surface of the insulating body 1 to be soldered to the circuit board, so that the electrical connector 100 is fixed to the circuit board.

Referring to fig. 1 and 4, each row of the terminals 2 is injection molded with an insulating block 5, the insulating block 5 is assembled into the insulating body 1 together with a row of the terminals 2, the plurality of terminals 2 are respectively received in the plurality of first terminal grooves 143 and the plurality of second terminal grooves 144, each of the terminals 2 has a fixing portion 21 fixed to the insulating block 5, an elastic arm 22 extends forward from the fixing portion 21, the elastic arm 22 has a contact portion 221 exposed to the slot 13 for contacting with the electronic component 200, a soldering portion 23 extends from the fixing portion 21 and is soldered to the circuit board, the soldering portion 23 and the elastic arm 22 are located at opposite ends of the fixing portion 21, each row of the terminals 2 respectively includes a plurality of pairs of signal terminals 2a and a plurality of ground terminals 2b, the signal terminals 2a are correspondingly received in the first terminal grooves 143, the ground terminal 2b is correspondingly received in the second terminal groove 144, the arrangement sequence of each row of the signal terminals 2a and the ground terminal 2b is "ground terminal 2 b-signal terminal 2 a-ground terminal 2 b-signal terminal 2 a", the first barrier 145 is only correspondingly disposed between the two contact portions 221 of the pair of signal terminals 2a, so as to ensure that the contact portions 221 of the pair of signal terminals 2a are not contacted to cause short circuit, and ensure that other portions of the elastic arms 22 of the pair of signal terminals 2a have larger coupling space due to not being blocked by the first barrier 145, which is beneficial for transmitting high-frequency signals, the second barrier 146 completely separates the signal terminals 2a from the ground terminal 2b, in the front-back direction, the front surface 11 of each insulating block 5 is located behind the bottom surface of the slot 13, and the medium around the elastic arm 22 located between the bottom surface of the slot 13 and the front surface 11 of the insulating block 5 is air, so that the part of the elastic arm 22 located between the front surface 11 of the insulating block 5 and the bottom surface of the slot 13 is not covered and fixed by the insulating block 5 and is completely exposed in the air, the elasticity of the elastic arm 22 is enhanced, meanwhile, the length of the elastic arm 22 exposed in the air is increased, the overall impedance of the signal terminal 2a is reduced, and the loss of current in the transmission process is avoided.

Referring to fig. 2, 3 and 5, the contact portion 221 of the signal terminal 2a is completely exposed to the communication hole 16 and exposed to the outer wall 142, the contact portion 221 is a portion contacting the electronic component 200, and a signal is transmitted from the electronic component 200 to the soldering portion 23 of the signal terminal 2a through the contact portion 221 and then transmitted to the circuit board, so as to reduce the impedance at the contact portion 221, and make the current more easily reach the soldering portion 23 through the contact portion 221 of the signal terminal 2 a; the contact portion 221 of the ground terminal 2b is correspondingly disposed on the retaining wall 17, so that the contact portion 221 of the ground terminal 2b is not exposed on the outer wall 142, but is surrounded by three surfaces of the retaining wall 17 and the two second barriers 146 on two sides, and only the contact portion 221 is exposed to contact with the electronic component 200, which is favorable for suppressing resonance and reducing crosstalk of the ground terminal 2b to the signal terminal 2a, the medium around the contact portion 221 of the ground terminal 2b has a first dielectric constant, the medium around the contact portion 221 of the signal terminal 2a has a second dielectric constant, since the communication hole 16 is disposed at the position of the sidewall 14 corresponding to the contact portion 221 of the signal terminal 2a, the contact portion 221 of the signal terminal 2a communicates with the outside air in a direction away from the direction of contacting with the electronic component 200, so that the first dielectric constant is greater than the second dielectric constant, the difference of the dielectric constants between the signal terminals 2a and the ground terminal 2b is increased, so that the energy coupling between the adjacent two signal terminals 2a is enhanced, and the adjacent two signal terminals 2a can mutually promote and jointly transmit the most energy.

Referring to fig. 7, in a state where the electronic component 200 is inserted into the insertion slot 13, at this time, the upper row of the contact portions 221 moves upward, the lower row of the contact portions 221 moves downward and enters the first terminal slot 143 and the second terminal slot 144, respectively, a contact point P of the contact portion 221 and the electronic component 200 is coplanar with the inner wall surface 141, the contact portion 221 enters the communication hole 16 due to moving in a direction away from the insertion slot 13, the communication hole 16 provides a space for elastic deformation of the contact portion 221, and after the electronic component 200 is inserted into the insertion slot 13, the contact portion 221 is closer to the communication hole 16, which is beneficial to adjusting impedance of the contact portion 221 and improving high-frequency performance; when the electronic component 200 is inserted into the slot 13, the contact point P between the contact portion 221 and the electronic component 200 moves to the free end of the first rail 145, and the first rail 145 can just separate and position the two contact portions 221, thereby preventing a short circuit between the contact portions 221 of the pair of signal terminals 2 a.

Referring to fig. 3 and 5, the contact portions 221 of the pair of signal terminals 2a are located in the same communication hole 16, and the pair of signal terminals 2a includes a first signal terminal 2a1 and a second signal terminal 2a2, a first distance d1 is provided between the contact portion 221 of the first signal terminal 2a1 and the inner wall of the communication hole 16, a second distance d2 is provided between the contact portion 221 of the second signal terminal 2a2 and the inner wall of the communication hole 16, the first distance d1 is equal to the second distance d2, so that the distance between the contact portion 221 of the first signal terminal 2a1 and the insulating plastic is equal to the distance between the contact portion 221 of the second signal terminal 2a2 and the insulating plastic, and the dielectric coefficients of the contact portion 221 of the first signal terminal 2a1 and the contact portion 221 of the second signal terminal 2a2 are approximately equal, thereby, the electric charge field distribution around the first signal terminal 2a1 and the second signal terminal 2a2 is uniform, the first signal terminal 2a1 and the second signal terminal 2a2 do not affect the respective signal transmission, a third distance d3 is provided between the free ends of the contact portions 221 of the first signal terminal 2a1 and the second signal terminal 2a2 and the inner wall of the communication hole 16, and the third distance d3 is greater than the first distance d1, so that the volume of the communication hole 16 is increased in the front-back direction and the distance between the contact portion 221 and the insulating plastic is increased without changing the arrangement distance between the two adjacent signal terminals 2a, which is beneficial to improving the high-frequency performance.

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

(1) the communication hole 16 penetrates through the side wall 14 in the thickness direction of the insulating body 1, so that the elastic arm 22 of each pair of the signal terminals 2a is exposed to the communication hole 16, and the elastic arm 22 of each signal terminal 2a is exposed to the air in a large area through the communication hole 16, so that the impedance of the elastic arm 22 part of each signal terminal 2a is small, and the transmission of high-frequency signals is improved;

(2) since the elastic arm 22 of the ground terminal 2b is shielded by the retaining wall 17, the dielectric constant of the medium around the elastic arm 22 of the ground terminal 2b is different from the dielectric constant of the medium around the elastic arm 22 of the signal terminal 2a, so that the difference of the dielectric constants between the signal terminal 2a and the ground terminal 2b is increased, the energy coupling between two adjacent signal terminals 2a is enhanced, and the two adjacent signal terminals 2a can mutually promote and transmit the most energy together.

(3) The communication hole 16 is correspondingly arranged at the position where the elastic arm 22 contacts with the electronic element 200, so that the contact part 221 is completely exposed from the communication hole 16, the signal is transmitted from the electronic element 200 to the signal terminal 2a through the contact part 221, the impedance at the contact part 221 is reduced, and the current can more easily pass through the contact part 221 of the signal terminal 2 a.

(4) The contact portion 221 of the signal terminal 2a enters the communication hole 16 after the electronic component 200 is inserted into the insertion slot 13, the communication hole 16 provides a space for the contact portion 221 to be elastically deformed, and when the electronic component 200 is inserted into the insertion slot 13, the contact portion 221 is closer to the communication hole 16, which is advantageous for adjusting the impedance of the contact portion 221 and improving the high-frequency performance.

(5) A first distance d1 is provided between the elastic arm 22 of the first signal terminal 2a1 and the inner wall of the communication hole 16, a second distance d2 is provided between the elastic arm 22 of the second signal terminal 2a2 and the inner wall of the communication hole 16, the first distance d1 is equal to the second distance d2, the distance between the elastic arm 22 of the first signal terminal 2a1 and the insulating plastic is equal to the distance between the elastic arm 22 of the second signal terminal 2a2 and the insulating plastic, and the dielectric coefficients of the two sides of the elastic arm 22 of the first signal terminal 2a1 and the elastic arm 22 of the second signal terminal 2a2 are approximately equal, so that the electric charge field distribution around the first signal terminal 2a1 and the second signal terminal 2a2 is uniform, and the electric charge field distribution does not affect each other signal transmission

(6) The free ends of the elastic arms 22 of the first signal terminal 2a1 and the second signal terminal 2a2 are spaced from the inner wall of the communication hole 16 by a third distance d3, and the third distance d3 is greater than the first distance d1, so that the volume of the communication hole 16 is increased in the front-rear direction and the distance between the elastic arms 22 and the insulating plastic is increased without changing the arrangement distance between two adjacent signal terminals 2a, which is beneficial to improving high-frequency performance.

(7) The first barrier 145 is disposed between the contact portions 221 of the two signal terminals 2a, so as to ensure that the contact portions 221 of the pair of signal terminals 2a are not in contact with each other to cause a short circuit, and ensure that other portions of the elastic arms 22 of the pair of signal terminals 2a have a larger coupling space due to being not blocked by the first barrier 145, thereby facilitating transmission of high-frequency signals; the second barrier 146 isolates the signal terminal 2a from the ground terminal 2b, so that the signal terminal 2a and the ground terminal 2b are completely blocked by the second barrier 146, and the capacitive coupling between the signal terminal 2a and the ground terminal 2b is low, thereby facilitating suppression of resonance and avoiding current loss and crosstalk.

(8) The first barrier 145 extends into the communication hole 16, the contact portions 221 of two adjacent signal terminals 2a and the first barrier 145 therebetween are exposed to the same communication hole 16, and the free ends of the first barrier 145 do not extend to the inner wall surface 141 of the communication hole 16, so that the two first terminal grooves 143 on both sides of the first barrier 145 are ensured to be not only respectively and independently communicated with the communication hole 16, but also the two adjacent first terminal grooves 143 are communicated with each other in the communication hole 16, thereby enhancing coupling, facilitating free circulation of air between the two first terminal grooves 143, and increasing heat dissipation.

(9) The retaining wall 17 and the two second barriers 146 together form the second terminal groove 144, so that three sides of the ground terminal 2b are surrounded, and only the contact portion 221 is exposed to be in contact with the electronic component 200, which is beneficial to inhibiting resonance and reducing crosstalk of the ground terminal 2b to the signal terminal 2 a.

(10) In the front-rear direction, the front surface 11 of each insulating block 5 is located behind the bottom surface of the slot 13, and the medium around the elastic arm 22 located between the bottom surface of the slot 13 and the front surface 11 of the insulating block 5 is air, so that the part of the elastic arm 22 located between the front surface 11 of the insulating block 5 and the bottom surface of the slot 13 is not covered and fixed by the insulating block 5 and is completely exposed in the air, the elasticity of the elastic arm 22 is enhanced, meanwhile, the length of the elastic arm 22 exposed in the air is increased, the overall impedance of the signal terminal 2a is reduced, and the loss of current in the transmission process is avoided.

The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all the equivalent technical changes using the description and drawings of the present invention are included in the scope of the present invention.

Claims (10)

1. An electrical connector for receiving an electronic component, comprising:

the electronic component comprises an insulating body, a first insulating layer and a second insulating layer, wherein the insulating body is provided with a slot and two side walls positioned on two opposite sides of the slot, and the electronic component is inserted into the slot;

the through holes penetrate through the side wall along the thickness direction of the insulation body, the two through holes are communicated with the slot, and a retaining wall is arranged between the two through holes;

the plurality of terminals are arranged in a row, each terminal is respectively provided with a fixing part which is fixedly held on the insulating body, and an elastic arm extends from one end of the fixing part and is exposed out of the slot, the elastic arm is electrically connected with the electronic element in a guiding mode, the plurality of terminals comprise at least two pairs of signal terminals and a grounding terminal positioned between the two pairs of signal terminals, the elastic arm of each pair of signal terminals is exposed out of the communicating hole, and the elastic arm of the grounding terminal is arranged on the retaining wall.

2. The electrical connector of claim 1, wherein: the elastic arm is provided with a contact part, the contact part is exposed out of the slot and is contacted with the electronic element, and the contact part is completely exposed out of the communication hole.

3. The electrical connector of claim 2, wherein: when the electronic component is inserted into the slot, the contact portion enters the communication hole.

4. The electrical connector of claim 1, wherein: the pair of signal terminals includes a first signal terminal and a second signal terminal, the elastic arm of the first signal terminal has a first distance from the inner wall of the communication hole, the elastic arm of the second signal terminal has a second distance from the inner wall of the communication hole, and the first distance is equal to the second distance.

5. The electrical connector of claim 4, wherein: and a third distance is reserved between the free tail end of the elastic arm and the inner wall of the communication hole, and the third distance is larger than the first distance.

6. The electrical connector of claim 1, wherein: the side wall is provided with a first terminal groove for accommodating the signal terminal and a second terminal groove for accommodating the grounding terminal, a first barrier is arranged between every two adjacent first terminal grooves, the elastic arm is provided with a contact part for contacting with the electronic element, the first barrier is arranged between every two adjacent contact parts of the signal terminal, a second barrier is arranged between the first terminal groove and the second terminal groove, and the second barrier separates the signal terminal from the grounding terminal.

7. The electrical connector of claim 6, wherein: the first barrier extends into the communication hole, the contact portions of two adjacent signal terminals and the first barrier therebetween are exposed to the same communication hole, and the free end of the first barrier does not extend to the inner wall surface of the communication hole.

8. The electrical connector of claim 6, wherein: the barricade with the surface of lateral wall flushes, the barricade with two the second jube encloses jointly and encloses into second terminal groove.

9. The electrical connector of claim 1, wherein: the insulating block is assembled on the insulating body, a front-back direction is defined along the plugging direction of the electronic element, the front surface of the insulating block is positioned behind the bottom surface of the slot, and media around the elastic arm between the bottom surface of the slot and the front surface of the insulating block are all air.

10. An electrical connector for receiving an electronic component, comprising:

the electronic component comprises an insulating body, a first insulating layer and a second insulating layer, wherein the insulating body is provided with a slot and two side walls positioned on two opposite sides of the slot, the electronic component is inserted into the slot, each side wall is respectively provided with an inner wall surface and an outer wall surface, and the two inner wall surfaces face the slot;

at least one communicating hole, wherein the communicating hole penetrates through the outer wall surface and is communicated with the slot;

the plurality of terminals are arranged in a row, each terminal is respectively provided with a fixing part fixed on the insulating body and an elastic arm extending from one end of the fixing part and exposed out of the slot, the elastic arms are electrically connected with the electronic element in a guiding mode, the plurality of terminals comprise at least one signal terminal and at least one grounding terminal, the elastic arms of the signal terminals are exposed out of the communication holes and exposed out of the outer wall surface, and the elastic arms of the grounding terminals are not exposed out of the outer wall surface.

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