CN213043077U

CN213043077U - Electrical connector

Info

Publication number: CN213043077U
Application number: CN202021477051.0U
Authority: CN
Inventors: 何建志
Original assignee: Lotes Guangzhou Co Ltd
Current assignee: Lotes Guangzhou Co Ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-04-23
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses an electric connector, include: the insulation body is provided with an upper surface and a lower surface which are oppositely arranged up and down and an accommodating groove which penetrates through the upper surface and the lower surface up and down, the accommodating groove is provided with a first groove wall and a second groove wall which are oppositely arranged front and back, an extending part is formed by extending from the first groove wall to the second groove wall in a protruding way, a yielding groove is formed between the left side and the right side of the extending part and the groove wall of the accommodating groove respectively, and a supporting part which extends out of the upper surface from the extending part in an upward protruding way and is positioned behind the first groove wall is used for supporting the first element; the terminal is provided with a base part accommodated in the accommodating groove, an elastic arm upwards extends from the base part to form a through hole, the supporting part upwards penetrates through the through hole, a contact part is formed by extending from the elastic arm and is used for contacting the first element, the contact part is positioned in front of the supporting part, a guide connection part downwards extends from the base part and is used for contacting the second element, and the elastic arm of the terminal is prevented from scraping the supporting part, so that the signal transmission stability is improved.

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 suitable for use between an electrically connected chip module and a circuit board.

[ background of the invention ]

There is known an electrical connector for electrically connecting a chip module to a circuit board, which includes an insulative housing and a plurality of terminals disposed on the insulative housing, the insulative housing having a first surface and a second surface disposed opposite to each other, and a plurality of receiving slots passing through the first surface and the second surface, the insulative housing having a supporting portion disposed at a front side of a front edge of each receiving slot, the supporting portion extending upward from the first surface, each receiving slot receiving one of the terminals, the terminals including a base portion received in the receiving holes and an elastic arm extending upward from the base portion to the first surface and extending forward, the elastic arm having a contact portion for electrically connecting with the chip module, the elastic arm having an opening between the contact portion and the base portion, the lower end of the base extends forwards horizontally to form a welding part. After the terminal is assembled in the accommodating groove from top to bottom, a solder ball is fixed at the lower end of the welding part in advance. When the chip module does not compress the terminal downwards, the supporting part is not accommodated in the opening; when the chip module compresses the terminals downwards, the supporting part protrudes out of the opening upwards to support the chip module, and meanwhile, the supporting part is clamped in the opening, so that the phenomenon of short circuit caused by the fact that the adjacent terminals are contacted together is avoided.

In the structure of the electrical connector, when the chip module compresses the elastic arm, the front end of the opening may easily scrape the front surface of the support part due to the size of the front end of the opening, or the difference in the degree of bending of the elastic arm, or the chip module may swing left and right when pressing down the elastic arm, so that plastic chips scraped from the support part are excessively generated, which affects the electrical performance of the terminal, or the elastic arm may easily abut against the support part at a position outside the opening, so that the support part cannot pass through the opening to support the chip module, and the elastic arm is deformed and damaged due to the pressing of the chip module, and the contact is not in place, which is not favorable for signal transmission.

Therefore, in view of the above problems, a new electrical connector needs to be designed to solve the above drawbacks.

[ Utility model ] content

To the problem that the background art faces, the utility model provides a prevent that the bullet arm of terminal from scraping the supporting part and the supporting part correctly counterpoints the through-hole on the bullet arm and support first component, improves the electric connector of signal transmission stability.

In order to achieve the above object, the utility model adopts the following technical means:

an electrical connector for electrically connecting a first component and a second component, comprising: the insulation body is provided with an upper surface and a lower surface which are oppositely arranged up and down, and an accommodating groove which vertically penetrates through the upper surface and the lower surface, the accommodating groove is provided with a first groove wall and a second groove wall which are oppositely arranged front and back, the insulation body is provided with an extending part which is formed by extending the first groove wall towards the second groove wall in a protruding way, the left side and the right side of the extending part respectively form a yielding groove with the groove wall of the accommodating groove, the insulation body is provided with a supporting part which extends out of the upper surface from the extending part in an upward protruding way and is used for supporting the first element upwards, and the supporting part is positioned behind the first groove wall; the terminal is accommodated in the accommodating groove, the terminal is provided with a base part accommodated in the accommodating groove, an elastic arm is formed by extending upwards from the base part, the elastic arm is provided with a through hole, the supporting part upwards penetrates through the through hole, a contact part is formed by extending from the elastic arm and is used for forming electric connection with the first element, the contact part is positioned in front of the supporting part, and a guide connection part is formed by extending downwards from the base part and is used for forming electric connection with the second element.

Furthermore, the elastic arm is formed by bending upwards from the base part, a first bent part is formed at the joint of the elastic arm and the base part, the contact part is formed by bending and extending upwards from the elastic arm, a second bent part is formed at the joint of the elastic arm and the base part, and the upper end of the support part is positioned between the first bent part and the second bent part.

Further, the insulating body has a plurality of receiving slots, each receiving slot receives one of the terminals, the receiving slots are arranged in a front-rear row, and a projection of the second bending portion of one of the terminals received in the rear row to the upper surface is located between two adjacent receiving slots in adjacent front rows.

Furthermore, the elastic arm is formed by bending upwards from the base part, a first bending part is formed at the joint of the elastic arm and the base part, and the first bending part is positioned above the upper surface.

Further, the elastic arm is provided with two branches, the through hole is formed between the two branches, and a gap exists between each branch and the supporting part.

Further, the base is located behind the extension portion, and a gap exists between the base and the extension portion in the front-rear direction.

Further, the portion of leading connecting has certainly connecting portion that the basal portion downwardly extending formed and certainly the connecting portion left and right sides extends two of formation forward and embraces the arm, it is located to embrace the arm the below in groove of stepping down, two it draws close each other to embrace the extension end of arm for with connecting portion constitute the structure of centre gripping, work as the terminal is assembled into with from last mode down during insulator, the groove of stepping down is used for stepping down embrace the arm.

Furthermore, the electric connector further comprises solder balls, the two embracing arms and the corresponding connecting parts clamp one solder ball together, and the supporting part is positioned right above the central point of the solder ball.

Furthermore, the insulation body is provided with a plurality of accommodating grooves, and a convex column is arranged corresponding to each accommodating groove, the convex column extends downwards from the lower surface and is positioned in front of the corresponding guide connection part to limit the corresponding solder ball.

Furthermore, the extending portion extends toward the direction of the lower surface, and the bottom surface of the extending portion is close to the lower surface and away from the upper surface, so as to stop the corresponding solder ball downwards.

Further, the base is provided with at least one first through groove penetrating through the base in the front and back direction.

Further, the electric connector further comprises a metal piece fixed on the base, at least one second through groove penetrating through the metal piece from front to back is formed in the metal piece, a part of the first through groove is communicated with the second through groove in the front-back direction, and the plate surface part of the base is exposed out of the second through groove in the front-back direction.

Furthermore, the electrical connector further comprises a metal piece fixed on the base, the accommodating groove is provided with two third groove walls connecting the first groove wall and the second groove wall, each third groove wall is concavely provided with a holding groove, the holding groove is positioned behind the extending part, and the metal piece and the base are held in the holding groove together.

Furthermore, the electric connector further comprises a metal piece fixed on the rear surface of the base part, a connecting part is arranged at the top end of the metal piece and used for connecting a material belt, and the connecting part protrudes out of the upper surface.

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

the extending part is formed by protruding from the first groove wall to the second groove wall, the yielding groove is formed between the left side and the right side of the extending part and the groove wall of the containing groove respectively, the supporting part protrudes upwards from the extending part to the upper surface and is arranged behind the first groove wall, so that the supporting part extends from the upper part corresponding to the containing groove, the supporting part is arranged by reasonably utilizing the vacant space on the insulating body, and the supporting part upwards passes through the through hole on the elastic arm before the first element is pressed down, compared with the prior art, the supporting part is arranged at the back as far as possible and does not interfere with the edge of the through hole on the elastic arm too much, so that the first element can be smoothly supported, and the supporting part can prevent the elastic arm from excessively swinging in the left and right directions, and further, the phenomenon that the adjacent terminals are contacted before to form short circuit is avoided, and the stable electrical connection between the contact parts of the terminals and the first element is ensured.

[ description of the drawings ]

Fig. 1 is an exploded perspective view of the electrical connector of the present invention, a circuit board and a chip module;

FIG. 2 is a perspective view of the electrical connector of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a rear view of the metal member of fig. 2 secured to the terminal;

fig. 5 is a top view of the dielectric body and a portion of the terminal of fig. 2;

FIG. 6 is a bottom view of FIG. 5;

FIG. 7 is a schematic view of the electrical connector of FIG. 5 taken along line B-B and not in contact with the chip module and the circuit board;

fig. 8 is a schematic diagram of the electrical connector in fig. 7 after contacting the chip module and the circuit board.

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

electric connector 100 insulation body 1 upper surface 11 and lower surface 12

The first groove wall 13a, the second groove wall 13b and the third groove wall 13c of the containing groove 13

The holding groove 13A and the relief groove 13B, the extension part 14 and the support part 15

Convex column 16 terminal 2 base 21 first through groove 211

Contact part 222 of branch 220 through hole 221 of elastic arm 22

First bent portion 23, second bent portion 24, connecting portion 25, and connecting portion 251

Second through groove 31 connecting part 32 of metal piece 3 of arm 252

Solder ball 4 first element 200 second element 300

[ 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.

As shown in fig. 1, 7 and 8, for the electrical connector 100 of the present invention, the electrical connector 100 is used to electrically connect a first element 200 and a second element 300, in this embodiment, the first element 200 is a chip module, and the second element 300 is a circuit board, but in other embodiments, the first element 200 and the second element 300 may be other components. In order to facilitate description of a specific structure in the electrical connector 100, a forward direction of an X axis forward in a front-back direction, a forward direction of a Y axis rightward in a left-right direction, and a forward direction of a Z axis upward in an up-down direction are defined, and the front-back direction, the left-right direction, and the up-down direction are perpendicular to each other in pairs.

As shown in fig. 1 and fig. 7, the electrical connector 100 includes an insulative housing 1, a plurality of terminals 2 and a plurality of metal elements 3 disposed on the insulative housing 1, and a plurality of solder balls 4, wherein each terminal 2 is correspondingly matched with one metal element 3 and one solder ball 4, and the solder balls 4 are used for soldering the terminal 2 to the second component 300.

As shown in fig. 5, 6 and 7, the insulating housing 1 has an upper surface 11 and a lower surface 12 which are disposed opposite to each other in the vertical direction, and a plurality of receiving slots 13 which vertically penetrate the upper surface 11 and the lower surface 12, wherein the receiving slots 13 are arranged in a front-rear row, and the receiving slots 13 in two adjacent rows in the front-rear direction are disposed in a staggered manner.

As shown in fig. 2, fig. 3 and fig. 5, the receiving slot 13 has a first slot wall 13A and a second slot wall 13b that are opposite to each other in a front-back direction, and two third slot walls 13c that connect the first slot wall 13A and the second slot wall 13b, the first slot wall 13A is located in front of the second slot wall 13b, and a holding slot 13A is formed at one end of each third slot wall 13c close to the second slot wall 13b in a recessed manner. The insulation body 1 has an extension portion 14 formed by protruding from the first groove wall 13a toward the second groove wall 13b, the extension portion 14 extends toward the lower surface 12, and a bottom surface of the extension portion 14 is close to the lower surface 12 and away from the upper surface 11, in this embodiment, the extension portion 14 extends to the lower surface 12, that is, the bottom surface of the extension portion 14 is flush with the lower surface 12. The holding groove 13A is located behind the extending portion 14, the left and right sides of the extending portion 14 respectively form an abdicating groove 13B between the groove walls of the accommodating groove 13, that is, the left and right sides of the extending portion 14 respectively form the abdicating groove 13B between the third groove walls 13c adjacent to the left and right sides of the extending portion 14, the holding groove 13A and the abdicating groove 13B are both a part of the accommodating groove 13, the insulation body 1 has a supporting portion 15 protruding upwards from the extending portion 14 out of the upper surface 11 for upwards supporting the first element 200, and the supporting portion 15 is located behind the first groove wall 13A corresponding to the accommodating groove 13.

As shown in fig. 6 and 7, the insulation body 1 is provided with a convex pillar 16 corresponding to the front of each receiving slot 13, and the convex pillar 16 is formed by extending downward from the lower surface 12.

As shown in fig. 2, 3 and 4, the housing grooves 13 house one terminal 2, and the terminals 2 are press-formed from a metal plate having a plate thickness of 0.05 mm. The terminal 2 is provided with a base 21 accommodated in the accommodating groove 13, the base 21 is located behind the extending portion 14, a gap exists between the base 21 and the extending portion 14 in the front-rear direction, the base 21 is provided with at least one first through groove 211 penetrating in the front-rear direction, in this embodiment, the base 21 is provided with two first through grooves 211 arranged side by side in the left-right direction and at an interval, and each first through groove 211 extends lengthwise in the up-down direction. In other embodiments, the number, shape and arrangement of the first through slots 211 may be set according to requirements. An elastic arm 22 is formed by bending and extending the upper end of the base 21 upwards, a first bent part 23 is formed at the joint of the base 21 and the elastic arm 22, and the first bent part 23 is located above the upper surface 11.

As shown in fig. 4, 5 and 7, each of the terminals 2 has a contact portion 222 bent and extended upward from the elastic arm 22 for forming an electrical connection with the first element 200, and the contact portion 222 is located in front of the corresponding base portion 21. A second bent portion 24 is formed at the connection position of the elastic arm 22 and the contact portion 222, and a projection of the second bent portion 24 of one of the terminals 2 accommodated in the accommodating groove 13 in the rear row to the upper surface 11 is located between two adjacent accommodating grooves 13 in adjacent front rows. The elastic arm 22 has two branches 220, a through hole 221 is formed between the two branches 220, the two branches 220 are gathered together at the lower end of the contact portion 222, the support portion 15 upwardly passes through the through hole 221, and the contact portion 222 is located in front of the support portion 15, a gap exists between each branch 220 and the support portion 15, so that when the first element 200 downwardly compresses the terminal 2, in the elastic deformation stroke of the elastic arm 22, the edge of the through hole 221 excessively scrapes the support portion 15, so as to ensure that the elastic arm 22 maintains good elastic performance, and the upper end of the support portion 15 is located between the first bending portion 23 and the second bending portion 24, so that the terminal 2 is stably and electrically connected to the first element 200.

As shown in fig. 2, 4 and 6, each terminal 2 extends downward from the lower end of the base 21 to form a conductive portion 25 for electrically connecting with the second element 300, and the post 16 is located in front of the corresponding conductive portion 25. The lead connecting portion 25 has certainly a connecting portion 251 that the base 21 downwardly extending formed and certainly two armful arms 252 that the left and right sides of connecting portion 251 extends forward and forms, two armful arm 252 one-to-one is located two the below of groove 13B of stepping down, work as terminal 2 with from last down mode assemble in during insulator 1, step down groove 13B is used for stepping down arm 252, two the extension end of arm 252 draws close each other for with connecting portion 251 constitutes the structure of centre gripping, be used for the centre gripping correspond tin ball 4.

As shown in fig. 1, 2 and 3, the metal fitting 3 is formed by press-molding a metal plate having a thickness of 0.1mm, and the metal fitting 3 is fixed to the rear surface of the base 21 and is held in the holding groove 13A together with the base 21 corresponding to the terminal 2. The top end of the metal piece 3 is provided with a connecting portion 32 for connecting a material belt, and the connecting portion 32 protrudes from the upper surface 11. The terminal 2 and the metal piece 3 are assembled on the corresponding accommodating groove 13 from top to bottom through the material belt, then the material belt is broken off from the connecting part between the material belt and the connecting part 32, the material belt is removed, so that the terminal 2 does not need to be provided with the connecting part on at least one of the left side and the right side of the terminal to be connected with another material belt, the connecting part forming an antenna effect on the terminal 2 can be avoided, meanwhile, the metal piece 3 is additionally arranged, the metal piece and the terminal 2 can be used as a conductor for transmitting signals, the facing area between the adjacent conductors and the thickness degree of the conductor are changed, the capacitive reactance and inductive reactance are changed, namely, the high-frequency performance is changed, and the terminal 2 has better performance when transmitting signals.

As shown in fig. 1 and 4, the metal component 3 is provided with at least one second through groove 31 penetrating through the metal component in the front-back direction, in this embodiment, the metal component 3 is provided with two second through grooves 31 arranged side by side in the up-down direction and at an interval, each second through groove 31 extends lengthwise in the left-right direction, and in other embodiments, the number, shape and arrangement of the first through grooves 211 may be set according to requirements. A part of the first through groove 211 communicates with the second through groove 31 in the front-rear direction, and the plate surface part of the base 21 is exposed to the second through groove 31 in the front-rear direction, and in this embodiment, a part of the first through groove 211 communicates with the second through groove 31 in the rear direction, and the rear plate surface part of the base 21 is exposed to the second through groove 31 in the rear direction.

As shown in fig. 5, 6 and 7, the convex pillar 16 is located in front of the guide portion 25, and forms an enclosure space together with the two arms 252 and the connecting portion 251 of the guide portion 25, so as to limit the solder ball 4 when the solder ball 4 is mounted. After the solder ball 4 is riveted, the two arm portions 252 and the corresponding connecting portion 251 clamp one solder ball 4 together, the supporting portion 15 is located right above the center point of the solder ball 4, and the extending portion 14 downwardly blocks the corresponding solder ball 4.

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

(1) the extending part 14 is formed by the insulation body 1 protruding from the first groove wall 13a to the second groove wall 13B, the receding groove 13B is formed between the left side and the right side of the extending part 14 and the groove wall of the accommodating groove 13, the supporting part 15 protruding from the extending part 14 to the upper surface 11 is provided at the rear of the first groove wall 13a, so that the supporting part 15 extends from the upper side corresponding to the accommodating groove 13, the supporting part 15 is provided by reasonably utilizing the vacant space on the insulation body 1, and the supporting part 15 passes through the through hole 221 on the elastic arm 22 before the first element 200 is pressed down, compared with the prior art, the supporting part 15 is provided as far back as possible without interfering with the edge of the through hole 221 on the elastic arm 22 too much, the first element 200 can be supported smoothly, and the supporting portion 15 can prevent the elastic arm 22 from excessive deflection in the left-right direction, so as to avoid the phenomenon that the adjacent terminals 2 are contacted before to form short circuit, and ensure that the contact portion 222 of the terminal 2 is stably and electrically connected with the first element 200.

(2) The elastic arm 22 of each terminal 2 has two branches 220, the through hole 221 is formed between the two branches 220, the two branches 220 are gathered together at the lower end of the contact part 222, the support part 15 upwards passes through the through hole 221, a gap exists between each branch 220 and the support part 15, and the situation that in the process of elastic deformation of the elastic arm 22, the edge of the through hole 221 excessively scrapes the support part 15 to generate plastic scraps scraped from the support part 15 to influence the electrical property of the terminal 2 is avoided.

(3) The upper end of the supporting portion 15 is located between the first bending portion 23 and the second bending portion 24, so that the elastic arm 22 has a sufficient pressing amount to ensure that the plurality of terminals 2 are all in contact with the first element 200, and when the first element 200 is prevented from compressing the terminals 2 downwards, the elastic arm 22 has a sufficient pressing amount to enable the terminals 2 to be stably and electrically connected to the first element 200.

(4) The material connecting portion 32 of the metal piece 3 protrudes from the upper surface 11, so that the material strip is conveniently broken at a connecting position between the material strip and the material connecting portion 32 after the material strip drives the terminal 2 and the metal piece 3 to be assembled in the accommodating groove 13 from top to bottom. In addition, the metal piece 3 is provided with the connecting part 32 connected with the material belt, so that the terminal 2 is not required to be provided with the connecting part 32 on at least one of the left side and the right side of the terminal 2 to be connected with another material belt, the connecting part 32 forming an antenna effect on the terminal 2 can be avoided, meanwhile, the metal piece 3 can be used as a conductor for transmitting signals together with the terminal 2, the facing area between the adjacent conductors and the thickness degree of the conductor are changed, and the capacitive reactance and the inductive reactance are changed, namely the high-frequency performance is changed, so that the terminal 2 has better performance when transmitting signals.

(5) A part of the first through groove 211 is communicated with the second through groove 31 in the front-back direction, and the plate surface part of the base 21 is exposed in the second through groove 31 in the front-back direction, so that the terminal 2 has a plurality of signal transmission paths to form a plurality of channels and change the high-frequency performance of the terminal, and after the terminal 2 and the metal piece 3 which are fixed together are electroplated, the terminal is good in flowability of clean water washing, easy to clean, capable of removing residual plating solution, good in convection of air and air blades, and beneficial to drying of the terminal 2 and the metal piece 3, and the terminal 2 and the metal piece 3 are kept clean.

(6) The convex column 16 is located in front of the guide portion 25, and forms an enclosure space together with the two arms 252 and the connecting portion 251 of the guide portion 25, so as to limit the corresponding solder ball 4 when the solder ball 4 is mounted, thereby facilitating correct riveting of the solder ball 4.

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 applying the present specification and the drawings are included in the scope of the present invention.

Claims

1. An electrical connector for electrically connecting a first component and a second component, comprising:

the insulation body is provided with an upper surface and a lower surface which are oppositely arranged up and down, and an accommodating groove which vertically penetrates through the upper surface and the lower surface, the accommodating groove is provided with a first groove wall and a second groove wall which are oppositely arranged front and back, the insulation body is provided with an extending part which is formed by extending the first groove wall towards the second groove wall in a protruding way, the left side and the right side of the extending part respectively form a yielding groove with the groove wall of the accommodating groove, the insulation body is provided with a supporting part which extends out of the upper surface from the extending part in an upward protruding way and is used for supporting the first element upwards, and the supporting part is positioned behind the first groove wall;

the terminal is accommodated in the accommodating groove, the terminal is provided with a base part accommodated in the accommodating groove, an elastic arm is formed by extending upwards from the base part, the elastic arm is provided with a through hole, the supporting part upwards penetrates through the through hole, a contact part is formed by extending from the elastic arm and is used for forming electric connection with the first element, the contact part is positioned in front of the supporting part, and a guide connection part is formed by extending downwards from the base part and is used for forming electric connection with the second element.

2. The electrical connector of claim 1, wherein: the elastic arm is formed by bending upwards from the base part, a first bent part is formed at the joint of the elastic arm and the base part, the contact part is formed by bending upwards and extending from the elastic arm, a second bent part is formed at the joint of the elastic arm and the base part, and the upper end of the supporting part is positioned between the first bent part and the second bent part.

3. The electrical connector of claim 2, wherein: the insulating body is provided with a plurality of accommodating grooves, each accommodating groove accommodates one terminal, the accommodating grooves are arranged in a front row and a rear row, and the projection of the second bending part of one terminal accommodated in the rear row to the upper surface is positioned between two adjacent accommodating grooves in the adjacent front rows.

4. The electrical connector of claim 1, wherein: the elastic arm is formed by bending upwards from the base part, a first bending part is formed at the joint of the elastic arm and the base part, and the first bending part is positioned above the upper surface.

5. The electrical connector of claim 1, wherein: the elastic arm is provided with two branches, the through hole is formed between the two branches, and a gap exists between each branch and the supporting part.

6. The electrical connector of claim 1, wherein: the base is located behind the extension portion, and a gap exists between the base and the extension portion in the front-rear direction.

7. The electrical connector of claim 1, wherein: lead connecting portion have certainly connecting portion that the basal portion downwardly extending formed and certainly the connecting portion left and right sides extends two of formation forward and embraces the arm, it is located to embrace the arm the below in groove of stepping down, two it draws close each other to embrace the extension end of arm for with connecting portion constitute the structure of centre gripping, work as the terminal with from last mode down in during insulator, the groove of stepping down is used for stepping down embrace the arm.

8. The electrical connector of claim 7, wherein: the connecting part is used for clamping the solder ball, the two embracing arms and the corresponding connecting parts clamp one solder ball together, and the supporting part is positioned right above the central point of the solder ball.

9. The electrical connector of claim 8, wherein: the insulating body is provided with a plurality of accommodating grooves, and a convex column is arranged corresponding to each accommodating groove, extends downwards from the lower surface and is positioned in front of the corresponding guide connection part to limit the corresponding solder ball.

10. The electrical connector of claim 8, wherein: the extending part extends towards the direction of the lower surface, and the bottom surface of the extending part is close to the lower surface and is far away from the upper surface so as to stop the corresponding solder ball downwards.

11. The electrical connector of claim 1, wherein: the base is provided with at least one first through groove penetrating through the base in the front and back direction.

12. The electrical connector of claim 11, wherein: the base further comprises a metal piece fixed on the base, at least one second through groove penetrating through the metal piece in the front and back direction is formed in the metal piece, a part of the first through groove is communicated with the second through groove in the front and back direction, and the plate surface part of the base is exposed out of the second through groove in the front and back direction.

13. The electrical connector of claim 1, wherein: the accommodating groove is provided with two third groove walls connecting the first groove wall and the second groove wall, each third groove wall is concavely provided with a holding groove, the holding groove is positioned behind the extending part, and the metal piece and the base are held in the holding groove together.

14. The electrical connector of claim 1, wherein: the material connecting device further comprises a metal piece fixed on the rear surface of the base, wherein a material connecting part is arranged at the top end of the metal piece and used for connecting a material belt, and the material connecting part protrudes out of the upper surface.