CN218887608U

CN218887608U - Electrical connector

Info

Publication number: CN218887608U
Application number: CN202222105396.9U
Authority: CN
Inventors: 周志勇
Original assignee: Lotes Co Ltd
Current assignee: Lotes Co Ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2023-04-18
Anticipated expiration: 2032-08-10

Abstract

The utility model discloses an electric connector, include: the insulation body is provided with an accommodating hole, a blocking part is arranged in the accommodating hole, and the left side and the right side of the blocking part are respectively inwards provided with a stepping groove; the conductive terminal is accommodated in the accommodating hole and provided with a base part, two connecting arms which extend downwards from the base part and are arranged at intervals left and right, and two clamping arms which extend downwards from the two connecting arms and are arranged at intervals left and right, an accommodating space is formed between the two connecting arms, the stopping part protrudes into the accommodating space to prevent siphoning, a clamping space is formed between the two clamping arms, the clamping space is upwards communicated with the accommodating space, a contraction opening is formed at the communication position of the clamping space and the accommodating space, the size of the contraction opening in the left and right directions is smaller than the maximum size of the accommodating space in the left and right directions and is not larger than one half of the maximum size of the clamping space in the left and right directions, or when the conductive terminal is observed from bottom to top, the connecting part of the connecting arms and the clamping arms protrudes into the abdicating groove to prevent single-side welding.

Description

Electrical connector

[ technical field ] A

The utility model relates to an electric connector especially relates to a weld good electric connector.

[ background of the invention ]

An existing electric connector, include an insulator, locate an accepting hole of insulator with accept in a conductive terminal of accepting hole, conductive terminal have a basal portion, certainly two linking arms that the interval set up and two from about the basal portion downwardly extending two centre gripping arms that the interval set up about the linking arm downwardly extending, two form a notch between the linking arm, two form a centre gripping space between the centre gripping arm, the centre gripping space upwards with notch intercommunication and intercommunication department between them form a intercommunication mouth, the electric connector still includes a tin ball, the tin ball quilt centre gripping arm centre gripping in the centre gripping space, and prop simultaneously prop two the centre gripping arm.

Although the electric connector fixes the solder ball through the clamping arm, the problem that the conductive terminal of the traditional electric connector fixes the solder ball in a pre-welding mode (namely, the solder ball is welded at the tail part of the terminal at first and then is welded on a circuit board) is solved, and the welding process is omitted, so that the manufacturing process of the electric connector is simpler, and the cost is reduced.

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

[ Utility model ] content

In order to solve the problem of the prior art, an object of the utility model is to provide an electric connector, set up the stop part in insulator's accepting hole, prevent that siphonage from producing and causing the solder joint air welding, reduce the size of centre gripping space and notch intercommunication department intercommunication mouth, reach and improve welded effect.

To achieve the above object, the present invention provides an electrical connector, including: the insulation body is provided with an accommodating hole, a stop part is arranged in the accommodating hole of the insulation body, and the left side and the right side of the stop part are respectively provided with a yielding groove inwards; the conductive terminal is accommodated in the accommodating hole and provided with a base part, two connecting arms which extend downwards from the base part and are arranged at left and right intervals, and two clamping arms which extend downwards from the two connecting arms and are arranged at left and right intervals, an accommodating space is formed between the two connecting arms, a clamping space is formed between the two clamping arms, the clamping space is upwards communicated with the accommodating space, a contraction opening is formed at the communication position of the clamping space and the accommodating space, the size of the contraction opening in the left and right directions is respectively smaller than the maximum size of the accommodating space in the left and right directions and the maximum size of the clamping space in the left and right directions, the stopping part protrudes into the accommodating space, the part where the connecting arm is connected with the clamping arms is defined as a connecting part, and the connecting part protrudes into the abdicating groove when viewed from bottom to top.

Further, the stopping parts are integrally connected with the front hole wall and the rear hole wall of the accommodating hole, the receding grooves are respectively arranged at intervals with the hole walls on the front side and the rear side of the accommodating hole in the front-rear direction, and the stopping parts are respectively arranged at intervals with the hole walls on the left side and the right side of the accommodating hole in the left-right direction.

The solder is clamped in the clamping space by the clamping arm and is positioned below the stopping part, and the top surface of the stopping part is matched with the bottom surface of the base part so as to prevent the conductive terminal from excessively moving downwards.

Furthermore, the solder is a solder ball, the side edge of the clamping arm adjacent to the clamping space is provided with an arc-shaped surface, and the arc-shaped surface is matched with the solder ball.

Further, the connecting arm and the clamping arm are located on the same vertical plane.

Further, the insulating body is provided with a blocking surface on a hole wall of at least one of the left side and the right side of the accommodating hole, the blocking surface and the bottom surface of the blocking portion are located on the same horizontal plane, a hook portion is arranged on one side of at least one of the clamping arms departing from the blocking portion in the left-right direction, the hook portion on the same side of the blocking portion in the left-right direction is located below the blocking surface, and the blocking surface is used for blocking the hook portion to prevent the conductive terminal from being separated from the insulating body upwards.

Further, a left side wall and a right side wall of the stopping portion at the abdicating groove are defined as first side walls, and on the same side of the stopping portion, the maximum distance between the hook portion and the connecting portion in the left-right direction is smaller than the minimum distance between the stopping surface and the first side wall in the left-right direction.

Further, the insulating body is provided with a plurality of accommodating holes arranged in a plurality of rows in the front-rear direction, two rows of the accommodating holes adjacent to each other in the front-rear direction are staggered, one accommodating hole located in the rear row and one accommodating hole located in the adjacent front row are communicated with each other through a through groove, the through groove penetrates through the insulating body downwards, each accommodating hole accommodates one conductive terminal, and the through groove and the clamping space of the conductive terminal accommodated in the front-rear adjacent accommodating hole are at least partially arranged in a right-facing manner in the front-rear direction.

Compared with the prior art, the utility model discloses following beneficial effect has: the left side and the right side of the stop part are respectively provided with the receding groove in an inwards concave manner, the size of the contraction opening in the left-right direction is respectively set to be smaller than the maximum size of the accommodating space in the left-right direction and the maximum size of the clamping space in the left-right direction, the connecting part of the conductive terminal at the contraction opening protrudes into the receding groove, so that the contraction opening can be ensured to be small, the tin melting space between the periphery of the solder and the clamping space required by the subsequent welding of the electric connector and the circuit board is reduced, the smaller the tin melting space is, the corresponding solder is easier to be connected with the clamping arm of the conductive terminal when the solder is heated and melted into tin liquid to flow and diffuse to the periphery, the phenomenon that the conductive terminal is welded in a single-side mode due to the large contraction opening in the welding process is avoided, the stop part enters the accommodating space, the base part protrudes and is matched with the top surface of the stop part adjacent to the edge of the accommodating space, and therefore the conductive terminal is prevented from entering the accommodating hole from top surface of the insulating body from top to the bottom and being excessively displaced downwards, and the conductive terminal can be used for being electrically connected with the circuit board.

The utility model also provides an electric connector, include: the insulating body is provided with an accommodating hole, and a stop part is arranged in the accommodating hole of the insulating body; the conductive terminal is accommodated in the accommodating hole and is provided with a base part, two connecting arms which extend downwards from the base part and are arranged at intervals left and right, and two clamping arms which extend downwards from the two connecting arms and are arranged at intervals left and right, an accommodating space is formed between the two connecting arms, a clamping space is formed between the two clamping arms, the clamping space is upwards communicated with the accommodating space, a contraction opening is formed at the communication position of the clamping space and the accommodating space, the size of the contraction opening in the left and right direction is respectively smaller than the maximum size of the accommodating space in the left and right direction and the maximum size of the clamping space in the left and right direction, the stopping part protrudes into the accommodating space, and the size of the contraction opening in the left and right direction is not larger than one half of the maximum size of the clamping space in the left and right direction.

Furthermore, the clamping space is used for clamping a solder, the solder is positioned below the stopping part, an abutting part is arranged on the side edge of each clamping arm adjacent to the clamping space and is used for abutting against the solder, and the size of the contraction opening in the left-right direction is not more than one half of the maximum size of the two abutting parts in the left-right direction.

Furthermore, the connecting part between the connecting arm and the clamping arm is defined as a connecting part, the left side and the right side of the stopping part are respectively provided with a yielding groove inwards, and the connecting part protrudes into the yielding groove when viewed from bottom to top; the left side wall and the right side wall of the stopping part at the abdicating groove are defined as first side walls, and the maximum distance between the hook part and the connecting part in the left-right direction is smaller than the minimum distance between the stopping surface and the first side wall in the left-right direction at the same side of the stopping part.

Further, the stopping part is integrally connected with the front hole wall and the rear hole wall of the accommodating hole, the receding groove is arranged at intervals with the hole walls on the front side and the rear side of the accommodating hole in the front-rear direction respectively, and the stopping part is arranged at intervals with the hole walls on the left side and the right side of the accommodating hole in the left-right direction respectively.

Compared with the prior art, the utility model discloses following beneficial effect has: the connecting arms of the conductive terminals are arranged on the left side and the right side of the stopping parts by arranging the stopping parts in the accommodating holes of the insulating body, the stopping parts protrude into the accommodating space, and when the conductive terminals are arranged in the accommodating holes from top to bottom, the stopping parts are matched with the base parts of the conductive terminals to prevent the conductive terminals from excessively moving downwards. The size of the shrinkage opening in the left-right direction is set to be not more than one half of the maximum size of the clamping space in the left-right direction, so that a tin melting space between the periphery of the solder and the clamping space required by the subsequent welding of the electric connector and the circuit board is reduced, the smaller the tin melting space is, the easier the solder is connected with the clamping arm of the conductive terminal when the solder is melted by heating and becomes molten tin which flows and spreads to the periphery, and the phenomenon of single-side welding caused by too large shrinkage opening of the conductive terminal in the welding process is avoided.

[ description of the drawings ]

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

FIG. 2 is a top view of the electrical connector shown in FIG. 1 with one conductive terminal and one solder ball hidden;

FIG. 3 is a partial enlarged view of A in FIG. 2;

FIG. 4 is a partial cross-sectional view taken along the line B-B in FIG. 2;

FIG. 5 is a schematic view of the electrical connector of FIG. 4 soldered to a circuit board and not crimped to a chip module;

FIG. 6 is a partial cross-sectional view of FIG. 4 taken along the direction C-C;

FIG. 7 is a schematic bottom view of the electrical connector of FIG. 1 with a plurality of solder balls and a conductive terminal hidden from view;

FIG. 8 is an enlarged view of a portion D of FIG. 7;

FIG. 9 is a partial view of the conductive terminal of FIG. 1 assembled to the insulative housing with the solder balls hidden to show a view angle of the bottom surface of the electrical connector;

FIG. 10 is an enlarged view of a portion E of FIG. 9;

FIG. 11 is a front view of the conductive terminal of FIG. 1 without a solder ball;

fig. 12 is a schematic view of the conductive terminals of fig. 11 clamping corresponding solder balls.

Electrical connector 100	Insulating body 1	Receiving hole 11
			Stopper portion 12	Abdication groove 13	First side wall 14
Stop face 15	Through slot 16	Conductive terminal 2
			Base 21	Resilient arm 22	Connecting arm 23
Gripping arm 24	Connecting part M	Arc surface				241
			Abutment 242	Hook 25	Clamping space 26
The housing space 27	Constriction opening N	Notch S
			Solder ball
3	Circuit board 200	Chip module 300

[ detailed description ] embodiments

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

For easy understanding, the present invention is defined as a left-right direction (X axis), a front-back direction (Y axis) and an up-down direction (Z axis), and these three directions are perpendicular to each other.

As shown in fig. 1 to 12, in an embodiment of the electrical connector of the present invention, the electrical connector 100 is electrically connected to a chip module 300 and soldered on a circuit board 200, the electrical connector 100 includes an insulating body 1, a plurality of conductive terminals 2 and a plurality of solders clamped by the plurality of conductive terminals 2 in a one-to-one correspondence manner, in this embodiment, the solders of the electrical connector 100 are solder balls 3, which are expressed as solder balls 3 as follows. In other embodiments, the solder may not be a solder ball, but may be a pillar structure or other shaped structure.

As shown in fig. 2, fig. 4 and fig. 7, the insulating body 11 is provided with a plurality of receiving holes 11 arranged in a plurality of rows along the front-back direction, two rows of the receiving holes 11 adjacent to each other in the front-back direction are staggered, each receiving hole 11 penetrates through the upper surface and the lower surface of the insulating body 1 along the up-down direction, one receiving hole 11 in the back row is communicated with one receiving hole 11 in the adjacent front row through a through groove 16, the through groove 16 penetrates through the insulating body 1 downward, each receiving hole 11 receives one conductive terminal 2, and each conductive terminal 2 correspondingly holds one solder ball 3.

As shown in fig. 4, 6 and 8, the insulation body 11 is provided with a blocking portion 12 in the receiving hole 11, the left and right sides of the blocking portion 12 are respectively provided with an abdicating groove 13 inwardly, and the left and right side walls of the blocking portion 12 at the abdicating groove 13 are defined as first side walls 14, in this embodiment, the blocking portion 12 is integrally connected to the front and rear hole walls of the receiving hole 11, the abdicating grooves 13 are respectively spaced from the hole walls at the front and rear sides of the receiving hole 11 in the front and rear directions, and the blocking portion 12 is respectively spaced from the hole walls at the left and right sides of the receiving hole 11 in the left and right directions. In other embodiments, the stopping portion 12 may be formed to protrude from the rear wall of the receiving hole 11 and be separated from the front wall of the receiving hole 11, or the stopping portion 12 may be formed to protrude from the front wall of the receiving hole 11 and be separated from the rear wall of the receiving hole 11.

As shown in fig. 4 and 8, the wall of the insulating body 1 on the left and right sides of the accommodating hole 11 is provided with a stop surface 15, and the stop surface 15 and the bottom surface of the stop portion 12 are located on the same horizontal plane. In other embodiments, the wall of the insulating body 1 on one of the left and right sides of the accommodating hole 11 is provided with the stopping surface 15, which can also meet the requirement.

As shown in fig. 1, 4 and 11, the conductive terminals 2 are formed by punching metal plates, each of the conductive terminals 2 has a base 21, an elastic arm 22 formed by bending and extending from an upper end of the base 21, two connecting arms 23 extending downward from a lower end of the base 21 and spaced from left to right, and two clamping arms 24 extending downward from the two connecting arms 23 and spaced from left to right, the stop portion 12 is located between the two connecting arms 23, in this embodiment, the two connecting arms 23 and the two clamping arms 24 are located on a same vertical plane, which facilitates the forming of the conductive terminals 2 and can reduce the space occupied by the conductive terminals 2 on the insulating body 1. Of course, in other embodiments, the two connecting arms 23 and the two clamping arms 24 may be located in different vertical planes.

As shown in fig. 4 and fig. 11, a hook portion 25 is disposed on one side of each of the two clamping arms 24 departing from the corresponding stop portion 12 in the left-right direction, a concave portion S is formed by inward enclosing of the connecting arm 23 and one side of the clamping arm 24 on the same side of the conductive terminal 2 departing from the corresponding stop portion 12 in the left-right direction, the two hook portions 25 of the conductive terminal 2 are located below the two stop surfaces 15 in a one-to-one correspondence manner, that is, the stop surface 15 partially enters the concave portion S, and the stop surface 15 is used to stop the hook portions 25, so as to prevent the conductive terminal 2 from upwardly separating from the insulating body 1. On the same side of the stopper portion 12, a maximum distance L1 between the hook portion 25 and the connecting portion M in the left-right direction is smaller than a minimum distance L2 between the stopper surface 15 and the first side wall 14 in the left-right direction. The present invention is not limited to the specific position of the hook portion 25, and at least one of the clamping arms 24 deviates from the left-right direction one side of the blocking portion 12 is provided with a hook portion 25, that is, in other embodiments, the hook portion 25 may be only disposed on the left side of the blocking portion 12 on the clamping arm 24, or may be only disposed on the right side of the blocking portion 12 on the clamping arm 24.

As shown in fig. 8, 10 and 11, an accommodating space 27 is formed between the two connecting arms 23, the stop portion 12 protrudes into the accommodating space 27, a clamping space 26 is formed between the two clamping arms 24, and the through slot 16 is at least partially opposite to the clamping space 26 of the conductive terminal 2 accommodated in the front and rear adjacent accommodating holes 11 in the front and rear direction.

As shown in fig. 4, 8 and 11, the holding space 26 communicates with the accommodating space 27 upward, and a contraction opening N is formed at the communication position of the holding space and the accommodating space 27, the dimension L3 of the contraction opening N in the left-right direction is smaller than the maximum dimension L4 of the accommodating space 27 in the left-right direction and the maximum dimension L5 of the holding space 26 in the left-right direction, respectively, and the dimension L3 of the contraction opening N in the left-right direction is not greater than one-half of the maximum dimension L5 of the holding space 26 in the left-right direction. The linking arm 23 with the position definition that both link to each other of centre gripping arm 24 is a connecting portion M, from up observing down, the protruding income of connecting portion M the groove of stepping down 13, in this embodiment, the protruding correspondence of stretching into of connecting portion M in the groove of stepping down 13. The receding groove 13 recedes the corresponding connecting portion M when the conductive terminal 2 is assembled downward in the receiving hole 11, and on the other hand, it is described that the dimension of the contraction port N in the left-right direction is relatively small.

As shown in fig. 4, 5 and 12, each of the solder balls 3 is held in the holding space 26 by the corresponding two holding arms 24, and the solder ball 3 is located below the stopping portion 12, so that the stopping portion 12 can prevent the solder ball 3 from siphoning upwards during the soldering process, thereby avoiding the occurrence of the bad phenomenon of solder joint empty soldering. In the process of mounting the conductive terminal 2 into the receiving hole 11, the top surface of the stop portion 12 is matched with the bottom surface of the base portion 21 to prevent the conductive terminal 2 from excessively moving downward.

As shown in fig. 4, 11 and 12, the side edge of the clamping arm 24 adjacent to the clamping space 26 has an arc surface 241 and an abutting portion 242, the abutting portion 242 is on the arc surface 241, the arc surface 241 is adapted to the solder ball 3, the dimension L3 of the shrinkage N in the left-right direction is not greater than one half of the maximum dimension L6 of the two abutting portions 242 in the left-right direction, when the solder ball 3 is loaded into the clamping space 26 from bottom to top, the abutting portion 242 abuts against the solder ball 3, the abutting portion 242 abuts against the maximum diameter of the solder ball 3, that is, the maximum dimension L6 of the two abutting portions 242 in the left-right direction is equal to the maximum diameter of the solder ball 3, when the solder ball 3 is completely loaded into the receiving hole 11, the top of the solder ball 3 does not contact with the bottom surface of the blocking portion 12, a small amount of gap is left between the solder ball 3 and the arc surface 241, so that in the process of soldering the circuit board 100, the solder liquid formed after being melted by heating is easily diffused to the gap between the two sides 241, and thus the single side of the solder ball 241 is prevented from being contacted with the gap.

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

1. the two clamping arms 24 are arranged at a left-right interval to form a clamping space 26, the clamping space 26 is arranged to be communicated with the accommodating space 27, a contraction opening N is formed at the communication position of the clamping space 26 and the accommodating space 27, the size of the contraction opening N in the left-right direction is respectively set to be smaller than the maximum size of the accommodating space 27 in the left-right direction and the maximum size of the clamping space 26 in the left-right direction, and the connecting part M of the conductive terminal 2 at the contraction opening N protrudes into the receding groove 13, so that the contraction opening N can be ensured to be smaller, a tin melting space between the periphery of the solder and the clamping space 26 required when the conductive terminal 100 is welded with the circuit board 200 subsequently is reduced, the solder can be more easily connected with the clamping arms 24 of the conductive terminal 2 when being heated and melted into a tin liquid which flows and spreads around, the phenomenon of single-side welding caused by the protruding opening N of the conductive terminal 2 in the welding process is avoided, the stopper 12 is inserted into the accommodating space 27, so that the edge of the base part 21 is adjacent to the edge of the conductive terminal 12 and the stopper 12, thereby preventing the solder from being electrically connected with the circuit board 100 and the stopper 12 from being electrically connected with the circuit board 100 in the lower end, and preventing the solder from being excessively moving of the solder connector 100 and being electrically connected with the circuit board 200 in the circuit board 200.

2. The dimension of the contraction port N in the left-right direction is set to be smaller than the maximum dimension of the accommodating space 27 in the left-right direction and the maximum dimension of the clamping space 26 in the left-right direction, respectively, the stop portion 12 protrudes into the accommodating space 27, and the dimension of the contraction port N in the left-right direction is set to be not larger than one half of the maximum dimension of the clamping space 26 in the left-right direction, according to the principle that, when the solder ball 3 is clamped by the clamping arm 24 and accommodated in the clamping space 26 without being welded, the smaller the contraction port N is, the smaller the space of the clamping space 26 connected with the top periphery of the solder ball 3 is, so that the smaller the space of the solder ball 3 heated by the heat is in the welding process, and the solder ball 3 is more easily connected to the clamping arm 24 when heated, thereby avoiding unilateral welding.

3. The stopper part 12 is integrally connected to the front and rear hole walls of the accommodating hole 11, so that the strength of the stopper part 12 can be increased, the abdicating groove 13 is respectively arranged at intervals with the hole walls on the front and rear sides of the accommodating hole 11 in the front and rear directions, and the stopper part 12 is respectively arranged at intervals with the hole walls on the left and right sides of the accommodating hole 11 in the left and right directions, so that the subsequent solder can enter the accommodating hole 11 and be uniformly heated in the accommodating hole 11 in the welding process, thereby realizing better welding, and the two clamping arms 24 of the conductive terminal 2 can realize the stopping function as long as being positioned on the left and right sides of the stopper part 12, and preventing the conductive terminal 2 from excessively displacing downwards.

4. The solder is set to be the solder ball 3, an arc-shaped face 241 is arranged on the side edge, adjacent to the clamping space 26, of the clamping arm 24, the arc-shaped face 241 is matched with the solder ball 3, so that the arc-shaped face 241 can be attached to the arc face of the solder ball 3 more easily, gaps between the solder ball 3 and the arc-shaped face 241 are further reduced, the solder ball 3 can be connected to the clamping arm 24 on two sides more easily when being heated and melted to enable the solder to move upwards in the welding process, and the phenomenon of single-side welding is further avoided.

5. The connecting arm 23 and the clamping arm 24 are arranged on the same vertical plane, and the lower part structure of the conductive terminal 2 can be directly blanked, so that the manufacturing process of the conductive terminal is reduced, and higher ball clamping precision can be achieved.

6. The hole wall of at least one side of the left side and the right side of the accommodating hole 11 of the insulating body 1 is provided with a stop surface 15, the stop surface 15 and the bottom surface of the stop part 12 are positioned on the same horizontal plane, when the insulating body 1 is formed, the stop surface 15 and the bottom surface of the stop part 12 can share one mold core, and the mold core has a simple structure, so that the mold is saved and the manufacturing process is simplified.

7. On the same side of the stop portion 12, the maximum distance between the hook portion 25 and the connecting portion M in the left-right direction is smaller than the minimum distance between the stop surface 15 and the first sidewall 14 in the left-right direction, and when the conductive terminal 2 enters the receiving hole 11, the connecting arm 23 and the clamping arm 24 will not interfere with the hole wall of the receiving hole 11, so that the conductive terminal 2 will not be damaged.

8. Through will be located one of back row accepting hole 11 and adjacent front row accepting hole 11 be equipped with a logical groove 16 and communicate each other, logical groove 16 runs through downwards insulator 1, logical groove 16 with accept around adjacent accepting hole 11 conductive terminal 2 the centre gripping space 26 is at least part just to setting up in the front and back direction, hot air current flows when convenient the welding, lets tin ball 3 is heated evenly, and has softened to a certain extent insulator 1's structural strength avoids insulator 1 produces great warpage volume after being heated.

9. The dimension L3 of the contraction opening N in the left-right direction is smaller than the maximum dimension L4 of the accommodation space 27 in the left-right direction, and the two connecting arms 23 are arranged so as to increase the holding force of the holding arms 24 on the solder balls 3.

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

1. An electrical connector, comprising:

the insulation body is provided with an accommodating hole, a stopping part is arranged in the accommodating hole of the insulation body, and the left side and the right side of the stopping part are respectively provided with a receding groove inwards;

the conductive terminal is accommodated in the accommodating hole and provided with a base part, two connecting arms which extend downwards from the base part and are arranged at left and right intervals, and two clamping arms which extend downwards from the two connecting arms and are arranged at left and right intervals, an accommodating space is formed between the two connecting arms, a clamping space is formed between the two clamping arms, the clamping space is upwards communicated with the accommodating space, a contraction opening is formed at the communication position of the clamping space and the accommodating space, the size of the contraction opening in the left and right directions is respectively smaller than the maximum size of the accommodating space in the left and right directions and the maximum size of the clamping space in the left and right directions, the stopping part protrudes into the accommodating space, the part where the connecting arm is connected with the clamping arms is defined as a connecting part, and the connecting part protrudes into the abdicating groove when viewed from bottom to top.

2. The electrical connector of claim 1, wherein: the retaining parts are integrally connected with the front hole wall and the rear hole wall of the accommodating hole, the receding grooves are respectively arranged at intervals with the hole walls on the front side and the rear side of the accommodating hole in the front-rear direction, and the retaining parts are respectively arranged at intervals with the hole walls on the left side and the right side of the accommodating hole in the left-right direction.

3. The electrical connector of claim 1, wherein: the solder is clamped in the clamping space by the clamping arm, the solder is positioned below the stopping part, and the top surface of the stopping part is matched with the bottom surface of the base part so as to prevent the conductive terminal from excessively displacing downwards.

4. The electrical connector of claim 3, wherein: the solder is a solder ball, the side edge of the clamping arm adjacent to the clamping space is provided with an arc-shaped surface, and the arc-shaped surface is matched with the solder ball.

5. The electrical connector of claim 1, wherein: the connecting arm and the clamping arm are located on the same vertical plane.

6. The electrical connector of claim 1, wherein: the insulating body is provided with a blocking surface on the hole wall of at least one of the left side and the right side of the accommodating hole, the blocking surface and the bottom surface of the blocking part are positioned on the same horizontal plane, one side of at least one clamping arm departing from the blocking part in the left-right direction is provided with a hook part, the hook part of the blocking part on the same side in the left-right direction is positioned below the blocking surface, and the blocking surface is used for blocking the hook part and preventing the conductive terminal from being separated from the insulating body upwards.

7. The electrical connector of claim 6, wherein: the left side wall and the right side wall of the stopping part at the abdicating groove are defined as first side walls, and the maximum distance between the hook part and the connecting part in the left-right direction is smaller than the minimum distance between the stopping surface and the first side wall in the left-right direction at the same side of the stopping part.

8. The electrical connector of claim 1, wherein: the insulating body is provided with a plurality of accommodating holes which are arranged in multiple rows along the front-back direction, two rows of the accommodating holes which are adjacent in the front-back direction are staggered, one accommodating hole which is positioned in the rear row is communicated with one accommodating hole which is positioned in the adjacent front row through a through groove, the through groove penetrates through the insulating body downwards, each accommodating hole accommodates one conductive terminal, and the through groove and the clamping space of the conductive terminal accommodated in the front-back adjacent accommodating hole are at least partially arranged in a right-facing manner in the front-back direction.

9. An electrical connector, comprising:

the insulating body is provided with an accommodating hole, and a stop part is arranged in the accommodating hole of the insulating body;

the conductive terminal is accommodated in the accommodating hole and is provided with a base part, two connecting arms which extend downwards from the base part and are arranged at intervals left and right, and two clamping arms which extend downwards from the two connecting arms and are arranged at intervals left and right, an accommodating space is formed between the two connecting arms, a clamping space is formed between the two clamping arms, the clamping space is upwards communicated with the accommodating space, a contraction opening is formed at the communication position of the clamping space and the accommodating space, the size of the contraction opening in the left and right direction is respectively smaller than the maximum size of the accommodating space in the left and right direction and the maximum size of the clamping space in the left and right direction, the stopping part protrudes into the accommodating space, and the size of the contraction opening in the left and right direction is not larger than one half of the maximum size of the clamping space in the left and right direction.

10. The electrical connector of claim 9, wherein: the clamping space is used for clamping a solder, the solder is positioned below the stopping part, an abutting part is arranged on the side edge of each clamping arm adjacent to the clamping space and is used for abutting against the solder, and the size of the contraction opening in the left-right direction is not larger than one half of the maximum size of the two abutting parts in the left-right direction.

11. The electrical connector of claim 10, wherein: the solder is a solder ball, the side edge of the clamping arm adjacent to the clamping space is provided with an arc-shaped surface, and the arc-shaped surface is matched with the solder ball.

12. The electrical connector of claim 9, wherein: the connecting arm and the clamping arm are located on the same vertical plane.

13. The electrical connector of claim 9, wherein: the insulating body is provided with a blocking surface on the hole wall of at least one of the left side and the right side of the accommodating hole, the blocking surface and the bottom surface of the blocking part are positioned on the same horizontal plane, one side of at least one clamping arm deviating from the blocking part in the left-right direction is provided with a hook part, the hook part of the blocking part on the same side in the left-right direction is positioned below the blocking surface, and the blocking surface is used for blocking the hook part to prevent the conductive terminal from upwards separating from the insulating body.

14. The electrical connector of claim 13, wherein: the connecting arm and the clamping arm are connected with each other at a position defined as a connecting part, the left side and the right side of the stopping part are respectively provided with a abdicating groove inwards, and the connecting part protrudes into the abdicating groove when being observed from bottom to top; the left side wall and the right side wall of the stopping part at the abdicating groove are defined as first side walls, and the maximum distance between the hook part and the connecting part in the left-right direction is smaller than the minimum distance between the stopping surface and the first side wall in the left-right direction at the same side of the stopping part.

15. The electrical connector of claim 14, wherein: the retaining parts are integrally connected with the front hole wall and the rear hole wall of the accommodating hole, the receding grooves are respectively arranged at intervals with the hole walls on the front side and the rear side of the accommodating hole in the front-rear direction, and the retaining parts are respectively arranged at intervals with the hole walls on the left side and the right side of the accommodating hole in the left-right direction.

16. The electrical connector of claim 9, wherein: the insulating body is provided with a plurality of accommodating holes which are arranged in multiple rows along the front-back direction, two rows of front-back adjacent accommodating holes are staggered, one accommodating hole positioned in the back row is communicated with one accommodating hole positioned in the front-back adjacent row through a through groove, the through groove penetrates through the insulating body downwards, each accommodating hole accommodates one conductive terminal, and the through groove is opposite to at least part of the clamping space of the conductive terminal accommodated in the front-back adjacent accommodating holes in the front-back direction.