CN220209350U - Electric connector and terminal thereof - Google Patents

Abstract

The utility model discloses an electric connector and a terminal thereof, wherein the terminal is provided with a first elastic arm and a second elastic arm, a through groove is at least arranged on the first elastic arm and penetrates through the thickness of the first elastic arm, two first arc edges are arranged at the left and right corners of the upper end of the through groove, a second arc edge is arranged between the two first arc edges at the upper end of the through groove, the second arc edge is connected with the first arc edge, the highest point of the first arc edge is higher than the connection point of the first arc edge and the second arc edge, and the highest point of the second arc edge is higher than the highest point of the first arc edge; the second bullet arm is connected with the bottom body of logical groove, and the upper end shaping of second bullet arm is preceding to be connected with second arc limit body and disconnection with the second arc limit after the shaping, and the side has the unloading limit that extends downwards from first arc limit about leading to the groove, unloading limit and second bullet arm unloading shaping. Because the die knife edge used in blanking is an arc surface corresponding to the first arc edge, the die is prevented from being provided with sharp corners; the highest point of the second arc edge is higher than the highest point of the first arc edge, so that the elasticity of the first elastic arm and the second elastic arm is larger.

Description

Electric connector and terminal thereof

[ field of technology ]

The present utility model relates to an electrical connector and a terminal thereof, and more particularly, to a terminal having a plurality of conductive paths and an electrical connector having the same.

[ background Art ]

Chinese patent application number CN201910014252.2 discloses a terminal comprising: the base part is provided with a first elastic arm, a third elastic arm and a second elastic arm, wherein the first elastic arm, the third elastic arm and the second elastic arm are formed by extending upwards side by side from the upper end of the base part, and the second elastic arm is positioned between the first elastic arm and the third elastic arm. The first elastic arm is provided with a first tearing surface at one side close to the second elastic arm, the third elastic arm is provided with a second tearing surface at one side close to the second elastic arm, the lower surface of the first elastic arm is provided with a contact surface, the tops of the first elastic arm and the third elastic arm are provided with a butt joint part for upwards abutting against a chip module, and the butt joint part is connected with the contact surface; the tail end of the second elastic arm is disconnected from the cutting surface during forming, two opposite sides of the second elastic arm are formed by tearing the first tearing surface and the second tearing surface, and the second elastic arm is provided with a contact part which is upwards abutted against the contact surface.

However, since the second spring arm is disposed in the middle of the terminal and is formed by tearing the first tear surface and the second tear surface, it is difficult to manufacture the second spring arm by using a tearing forming process, and the contact surface of the terminal is larger, so that the second spring arm is shorter, resulting in less elasticity of the contact surface portion and the contact portion of the terminal, and thus, a larger pressure is required when the chip module presses down the terminal.

Therefore, there is a need to design an electrical connector and its terminals to solve the above technical problems.

[ utility model ]

The utility model provides a terminal which is easy to manufacture and has higher elasticity and an electric connector with the terminal.

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

a terminal, comprising: the first elastic arm is provided with a through groove which is at least arranged on the first elastic arm and penetrates through the thickness of the first elastic arm, two first arc edges are arranged at the left corner and the right corner of the upper end of the through groove, a second arc edge is arranged between the two first arc edges at the upper end of the through groove, the second arc edge is connected with the first arc edge, the highest point of the first arc edge is higher than the connection point of the first arc edge and the second arc edge, and the highest point of the second arc edge is higher than the highest point of the first arc edge; the top of the first elastic arm is provided with a butt joint part which is used for upwards abutting against the butt joint element, and the butt joint part is positioned in front of the through groove; the second elastic arm is integrally connected with the bottom end of the through groove, the upper end of the second elastic arm is integrally connected with the second arc edge before being molded and then is disconnected with the second arc edge, the left side and the right side of the through groove are provided with blanking edges which extend downwards from the first arc edge, the first arc edge and the blanking edges are both molded with the blanking of the second elastic arm, the second elastic arm is provided with a contact part, and when the butt joint part is pressed downwards by the butt joint element to a final position, the contact part is contacted with the first elastic arm, and the contact position of the first elastic arm and the second elastic arm is positioned in front of the through groove.

Further, the terminal is provided with a pair of clamping parts for clamping a solder ball, and the solder ball part is exposed from the through groove when seen from top to bottom.

Further, when the abutting element does not abut against the abutting portion, the contact portion is not in contact with the first spring arm; the contact portion surface and the butt portion surface are both gold-plated, and the gold-plating thickness of the butt portion is greater than the gold-plating thickness of the contact portion.

Further, each of the left and right sides of the first spring arm has a tapered edge, the distance between the tapered edges gradually increases from top to bottom, the highest point of the second arc edge is higher than the lowest point of the tapered edge but lower than the highest point of the tapered edge, and the contact position of the contact part and the first spring arm is located between the through groove and the abutting part.

Meanwhile, the utility model also comprises another technical scheme:

an electrical connector, comprising: an insulating body having a plurality of receiving grooves penetrating the insulating body up and down; a plurality of terminals, each of the terminals comprising: a base part which is in a vertical flat plate shape and the front and rear surfaces are plate surfaces; the first elastic arm is formed by bending and extending from the upper end of the base part, the top of the first elastic arm is provided with a butt joint part for upwards abutting against the butt joint element, and the butt joint part is positioned in front of the base part; the through groove penetrates through the thickness of the base part and the thickness of the first elastic arm, two first arc edges are arranged at the left corner and the right corner of the upper end of the through groove, a second arc edge is arranged between the two first arc edges at the upper end of the through groove, the second arc edge is connected with the first arc edge, the highest point of the first arc edge is higher than the connection point of the first arc edge and the second arc edge, and the highest point of the second arc edge is higher than the highest point of the first arc edge; the second elastic arm is integrally connected with the bottom end of the through groove, the upper end of the second elastic arm is integrally connected with the second arc edge before being molded and then is disconnected with the second arc edge after being molded, the left side and the right side of the through groove are provided with blanking edges extending downwards from the first arc edge, the first arc edge and the blanking edges are formed with the blanking of the second elastic arm, the second elastic arm is provided with a contact part, and when the butt joint part is pressed downwards by the butt joint element to a final position, the contact part is contacted with the first elastic arm, and the contact position of the first elastic arm and the second elastic arm is positioned in front of the through groove.

Further, the blanking edge is provided with a first section connected with the first arc edge, a second section which is inclined downwards from the first section and is close to the through groove, and a third section which is downwards extended to the upper end of the base from the second section, wherein the distance between the left and right first sections of each through groove is larger than the distance between the left and right third sections.

Further, the left side and the right side of the through groove are provided with tearing edges extending downwards from the upper end of the base part, the tearing edges and the second elastic arms are torn and formed, the tearing edges protrude inwards towards the through groove relative to the blanking edges, so that an abutting area is formed between the bottom edge of the blanking edges and the top edge of the tearing edges at the upper end of the base part, the jig is used for abutting and pushing the terminal to be downwards assembled in the accommodating groove, the abutting area is arc-shaped, and the joint of the abutting area and the tearing edges is higher than the lowest point of the arc shape.

Further, a pair of clamping parts are arranged below the base part of the terminal and used for clamping a solder ball, and the solder ball part is exposed in the through groove when seen from top to bottom.

Further, each of the left and right sides of the first spring arm has a tapered edge, the distance between the tapered edges gradually increases from top to bottom, the highest point of the second arc edge is higher than the lowest point of the tapered edge but lower than the highest point of the tapered edge, and the contact position of the contact part and the first spring arm is located between the through groove and the abutting part.

Further, the upper surface of the insulating body is convexly provided with a plurality of protruding blocks, each protruding block is provided with a supporting surface for supporting the abutting element, when the abutting element downwards abuts against the abutting part to a final position, the tapered edge is located between the left and right adjacent supporting surfaces when seen from top to bottom, and the rear edge of the supporting surface is located in front of the rear edge of the tapered edge.

Compared with the prior art, the electric connector and the terminal thereof have the following beneficial effects:

the second elastic arm of the terminal is subjected to blanking forming with the blanking edge and the first arc edge of the through groove, compared with tearing forming, the blanking forming process is easier to manufacture the second elastic arm in the middle of the terminal, and a die knife edge used during blanking is an arc surface corresponding to the first arc edge, so that the die is prevented from being provided with a sharp angle at a position close to the second elastic arm, the service life of the die is prolonged, and the problem that waste materials fall due to sharp angle abrasion affects the performance of the terminal is avoided; the highest point of the second arc edge is higher than the highest point of the first arc edge, so that the length of the second elastic arm can be made longer, and the second elastic arm is more elastic.

[ description of the drawings ]

Fig. 1 is a perspective view of a first embodiment of an electrical connector according to the present utility model;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a top view of the mating member pressing down on the terminals to a final position;

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

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

FIG. 6 is a perspective view of the other angle of FIG. 1;

fig. 7 is a plan view of the terminal of fig. 1 prior to molding;

fig. 8 is a perspective view of the terminal of fig. 1;

FIG. 9 is a rear view of FIG. 8;

FIG. 10 is a side view of FIG. 8;

fig. 11 is a perspective view of a terminal of a second embodiment of an electrical connector of the present utility model;

fig. 12 is a rear view of fig. 11.

Reference numerals of the specific embodiments illustrate:

[ detailed description ] of the utility model

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

Referring to fig. 1, a first embodiment of an electrical connector 100 of the present utility model includes an insulative housing 1, a plurality of terminals 2 and a plurality of solder balls 3. The insulating body 1 has a plurality of receiving grooves 11 penetrating from top to bottom, each of the terminals 2 is correspondingly received in each of the receiving grooves 11, each of the terminals 2 clamps one of the solder balls 3, and the terminals 2 are soldered to the circuit board 6 by soldering the solder balls 3. ( In the figure, the extending direction of the X axis is the front-back direction, and the positive direction of the X axis is the front direction; the extending direction of the Y axis is the left-right direction, and the positive direction of the Y axis is the right direction; the extending direction of the Z axis is the up-down direction, and the positive direction of the Z axis is the up direction )

Referring to fig. 1, 4 and 6, the upper surface of the insulating body 1 is provided with a plurality of protruding blocks 12, each protruding block 12 has a supporting surface 121 for supporting the docking element 5, a protruding portion 16 is disposed in the accommodating groove 11, and the protruding portion 16 is located above the solder ball 3 for stopping the solder ball 3 from moving upwards; the lower surface of the insulating body 1 is provided with a stop surface 13 for stopping the terminal 2, and a first stop block 14 and a second stop block 15 for stopping the solder ball 3.

Referring to fig. 1, 4 and 7, each of the terminals 2 includes a base 21 having a vertical flat plate shape and a front surface and a rear surface being a plate surface, a material connecting edge 211 is provided on the left side and the right side of the base 21 for connecting the material strip 4, a notch 212 is provided below the material connecting edge 211 on the base 21, the notch 212 is connected with the material connecting edge 211, the notch 212 is used for providing a relief for a cutter when the cutter cuts the material strip 4, and a first limiting portion 213 is respectively provided on the left side and the right side of the base 21 and below the notch 212; a first spring arm 22 is formed by bending and extending from the upper end of the base 21, a butt joint part 222 is arranged at the top of the first spring arm 22 and is used for upwards abutting against a butt joint element 5, and the butt joint part 222 is positioned in front of the base 21; the base 21 and the first spring arm 22 are provided with a through groove 23 penetrating through the thickness of the base 21 and the first spring arm, two first arc edges 231 are arranged at the left and right corners of the upper end of the through groove 23, a second arc edge 232 is arranged between the two first arc edges 231 at the upper end of the through groove 23, the second arc edge 232 is connected with the first arc edge 231, the highest point of the first arc edge 231 is higher than the connection point of the first arc edge 231 and the second arc edge 232, and the highest point of the second arc edge 232 is higher than the highest point of the first arc edge 231; the bottom of the through slot 23 is integrally connected with a second spring arm 24, the upper end of the second spring arm 24 is integrally connected with the second arc edge 232 before being molded and is disconnected from the second arc edge 232 after being molded, the left side and the right side of the through slot 23 are provided with blanking edges 233 extending downwards from the first arc edge 231, the first arc edge 231 and the blanking edges 233 are both in blanking molding with the second spring arm 24, the second spring arm 24 is provided with a contact portion 241, and when the abutting element 5 pushes down the abutting portion 222 to a final position, the contact portion 241 contacts the first spring arm 22, and the contact position of the contact portion and the first spring arm is located between the through slot 23 and the abutting portion 222 (as shown in fig. 6); a pair of clamping portions 25 extend downwardly from the base 21 for clamping the solder balls 3.

Referring to fig. 5 and 10, when the abutting element 5 is pressed against the abutting element 222, the abutting element 222 moves on the abutting element 5 to generate friction, and the moving amount of the abutting element 222 is greater than the moving amount of the abutting element 241, so that the gold plating thickness of the abutting element 222 is greater than the gold plating thickness of the abutting element 241, and when the abutting element 5 is not pressed against the abutting element 222, the abutting element 241 is not contacted with the first spring arm 22, thereby facilitating gold plating on the abutting element 241. In other embodiments, the contact portion 241 may also contact the first spring arm 22 when the docking element 5 does not press down against the docking portion 222.

Referring to fig. 1-3 and 7, each of the left and right sides of the first spring arm 22 has a tapered edge 223, and the distance between the two tapered edges 223 decreases gradually from the back to the front, and the highest point of the second arc edge 232 is higher than the lowest point of the tapered edge 223 but lower than the highest point of the tapered edge 223, so that the portion of the terminal 2 between the two tapered edges 223 becomes smaller, and the elasticity of the portion of the terminal 2 between the two tapered edges 223 becomes larger. When the abutting element 5 abuts against the abutting portion 222 downwards to the final position, the tapered edge 223 is located between the two adjacent supporting surfaces 121 from top to bottom, and the rear edge of the supporting surface 121 is located in front of the rear edge of the tapered edge 223.

Referring to fig. 1 and 7-9, the through groove 23 divides the first spring arm 22 into two sub-arms 224 spaced left and right, the blanking edge 233 has a first section 2331 connected to the first arc edge 231, a second section 2332 inclined downward from the first section 2331 and toward the through groove 23, and a third section 2333 extending downward from the second section 2332 to the upper end of the base 21, and a distance between the left and right first sections 2331 of the through groove 23 is greater than a distance between the left and right third sections 2333, such that a width of a lower portion of each sub-arm 224 is greater than a width of an upper portion of the sub-arm 224.

Referring to fig. 1 and 8-9, the left and right sides of the through slot 23 have tearing edges 234 extending downward from the upper end of the base 21, the tearing edges 234 and the second elastic arms 24 are formed by tearing, and the tearing edges 234 protrude inward toward the through slot 23 relative to the blanking edges 233 so that an abutting area 235 is formed between the bottom edge of the blanking edges 233 and the top edge of the tearing edges 234 at the upper end of the base 21, the abutting area 235 is abutted by a jig so as to assemble the terminal 2 in the accommodating slot 11 downward, the abutting area 235 is arc-shaped, and the connection between the abutting area 235 and the tearing edges 234 is higher than the lowest point of the arc shape, and the jig abuts against the connection between the abutting area 235 and the tearing edges 234. The lateral sides of the base 21 in the left-right direction have a material connecting edge 211, so that the width of the terminal 2 in the left-right direction is smaller, and the size of the terminal 2 is smaller, and the terminal 2 is suitable for the electric connector 100 with higher density and higher high-frequency performance requirement of the terminal 2, and the material strip 4 is removed before the terminal 2 is assembled into the accommodating groove 11, and then the pushing area 235 is pushed by the jig to assemble the terminal 2 in the accommodating groove 11 downwards, so that the terminal 2 is not pre-broken at the material connecting edge 211, and is not easy to fall from the material connecting edge 211 in the electroplating and transportation processes.

Referring to fig. 1 and 9, the left and right sides of the through groove 23 are respectively provided with a first edge 236 extending downward from the tearing edge 234 to the bottom end of the through groove 23, and the first edge 236 and the left and right sides of the second spring arm 24 are formed by blanking, so that the second spring arm 24 is easier to manufacture; the tearing edge 234 has a second edge 2341 extending downwards from the pushing area 235 and a third edge 2342 extending downwards from the second edge 2341 and away from the through slot 23, a distance between the left and right third edges 2342 is greater than a distance between the left and right second edges 2341, the third edge 2342 is connected with the first edge 236, and the arrangement of the third edge 2342 can increase a width of the second spring arm 24 corresponding to the third edge 2342, so as to improve strength of the second spring arm 24 and strength of a punch.

Referring to fig. 3, a gap is formed between the blanking edge 233 and the second spring arm 24, and the solder ball 3 is partially exposed in the gap, and the gap can be used for air convection, so that heat generated by soldering the solder ball 3 is easily dissipated.

Referring to fig. 1-3, the receiving grooves 11 are arranged side by side in the left-right direction and are staggered in the front-rear direction, the protruding blocks 12 are located behind the corresponding receiving grooves 11, and when the abutting element 5 abuts against the abutting portion 222 to the final position, the tapered edge 223 is located between the left and right protruding blocks 12 when seen from top to bottom.

Referring to fig. 4 and 6, a second limiting portion 251 is protruding from a side edge of the clamping portion 25, and the first limiting portion 213 and the second limiting portion 251 are respectively blocked on corresponding inner walls of the accommodating groove 11 along the left-right direction so as to limit the left-right movement of the base 21; the clamping part 25 is provided with a notch 252, and the bottom surface of the notch 252 is blocked upwards on the blocking surface 13 of the insulating body 1 so as to block the clamping part 25 from moving upwards; the first stop block 14 is positioned in front of the clamping part 25 and stops the solder ball 3 from moving forward, and the second stop block 15 is positioned behind the clamping part 25 and stops the solder ball 3 from moving backward.

Referring to fig. 11-12, a second embodiment of a terminal 2' of an electrical connector 100 according to the present utility model is different from the terminal 2 of the first embodiment in that: the left side edge and the right side edge of the through groove 23 'are not provided with a first edge 236 which is positioned below the tearing edge 234' and is formed by blanking the second elastic arm 24 ', the tearing edge 234' extends downwards from the upper end of the base part 21 'to the bottom end of the through groove 23' (that is, the side edge of the base part 21 'connecting the through groove 23' and the second elastic arm 24 'are formed by tearing), and the interval between the two tearing edges 234' is gradually increased from top to bottom; the base 21 'is provided with left and right convex hulls a in a convex manner, and the convex hulls a are blocked on the corresponding inner walls of the accommodating groove 11 forwards to limit the base 21' to move forwards. The remaining structure is the same as the terminal 2 of the first embodiment, and thus will not be described again.

In summary, the electrical connector 100 of the present utility model has the following advantages:

(1) The second spring arms 24, 24 'of the terminals 2, 2' and the blanking edges 233, 233 'of the through grooves 23, 23' and the first arc edges 231, 231 'are formed, compared with tear forming, the second spring arms 24, 24' are easier to manufacture in the middle of the terminals 2, 2 'by adopting a blanking forming process, and the die edges used in blanking are arc surfaces corresponding to the first arc edges 231, 231', so that sharp corners are prevented from being arranged at positions close to the second spring arms 24, 24 ', the service life of the die is prolonged, and the effect of the sharp corners on the performance of the terminals 2, 2' due to falling waste caused by abrasion can be avoided.

(2) The highest point of the second arc edge 232, 232 'is higher than the highest point of the first arc edge 231, 231', so that the length of the second spring arm 24, 24 'can be made longer, thereby making the second spring arm 24, 24' more elastic; the left and right sides of the first spring arm 22, 22 ' each have a tapered edge 223, 223 ', and the highest point of the second arc edge 232, 232 ' is higher than the lowest point of the tapered edges 223, 223 ' but lower than the highest point of the tapered edges 223, 223 ', so that the portion of the terminal 2, 2 ' between the two tapered edges 223, 223 ' is smaller, thereby making the portion of the terminal 2, 2 ' between the two tapered edges 223, 223 ' more elastic.

The above detailed description is merely illustrative of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model, so that all equivalent technical changes that can be made by the present specification and illustrations are included in the scope of the utility model.

Claims (10)

1. A terminal, comprising:

the first elastic arm is provided with a through groove which is at least arranged on the first elastic arm and penetrates through the thickness of the first elastic arm, two first arc edges are arranged at the left corner and the right corner of the upper end of the through groove, a second arc edge is arranged between the two first arc edges at the upper end of the through groove, the second arc edge is connected with the first arc edge, the highest point of the first arc edge is higher than the connection point of the first arc edge and the second arc edge, and the highest point of the second arc edge is higher than the highest point of the first arc edge; the top of the first elastic arm is provided with a butt joint part which is used for upwards abutting against the butt joint element, and the butt joint part is positioned in front of the through groove;

the second elastic arm is integrally connected with the bottom end of the through groove, the upper end of the second elastic arm is integrally connected with the second arc edge before being molded and then is disconnected with the second arc edge, the left side and the right side of the through groove are provided with blanking edges which extend downwards from the first arc edge, the first arc edge and the blanking edges are both molded with the blanking of the second elastic arm, the second elastic arm is provided with a contact part, and when the butt joint part is pressed downwards by the butt joint element to a final position, the contact part is contacted with the first elastic arm, and the contact position of the first elastic arm and the second elastic arm is positioned in front of the through groove.

2. The terminal according to claim 1, wherein: the terminal is provided with a pair of clamping parts for clamping a solder ball, and the solder ball part is exposed from the through groove when seen from top to bottom.

3. The terminal according to claim 1, wherein: when the abutting element does not abut against the abutting part, the contact part is not contacted with the first elastic arm; the contact portion surface and the butt portion surface are both gold-plated, and the gold-plating thickness of the butt portion is greater than the gold-plating thickness of the contact portion.

4. The terminal according to claim 1, wherein: the left side and the right side of the first elastic arm are respectively provided with a tapered edge, the distance between the tapered edges is gradually increased from top to bottom, the highest point of the second arc edge is higher than the lowest point of the tapered edge but lower than the highest point of the tapered edge, and the contact position of the contact part and the first elastic arm is positioned between the through groove and the butt joint part.

5. An electrical connector, comprising:

an insulating body having a plurality of receiving grooves penetrating the insulating body up and down;

a plurality of terminals, each of the terminals comprising:

a base part which is in a vertical flat plate shape and the front and rear surfaces are plate surfaces;

the first elastic arm is formed by bending and extending from the upper end of the base part, the top of the first elastic arm is provided with a butt joint part for upwards abutting against the butt joint element, and the butt joint part is positioned in front of the base part;

the through groove penetrates through the thickness of the base part and the thickness of the first elastic arm, two first arc edges are arranged at the left corner and the right corner of the upper end of the through groove, a second arc edge is arranged between the two first arc edges at the upper end of the through groove, the second arc edge is connected with the first arc edge, the highest point of the first arc edge is higher than the connection point of the first arc edge and the second arc edge, and the highest point of the second arc edge is higher than the highest point of the first arc edge;

the second elastic arm is integrally connected with the bottom end of the through groove, the upper end of the second elastic arm is integrally connected with the second arc edge before being molded and then is disconnected with the second arc edge after being molded, the left side and the right side of the through groove are provided with blanking edges extending downwards from the first arc edge, the first arc edge and the blanking edges are formed with the blanking of the second elastic arm, the second elastic arm is provided with a contact part, and when the butt joint part is pressed downwards by the butt joint element to a final position, the contact part is contacted with the first elastic arm, and the contact position of the first elastic arm and the second elastic arm is positioned in front of the through groove.

6. The electrical connector of claim 5, wherein: the blanking edge is provided with a first section connected with the first arc edge, a second section which is obliquely downward from the first section and approaches the through groove, and a third section which is downward from the second section and extends to the upper end of the base, and the distance between the left and right first sections of each through groove is larger than the distance between the left and right third sections.

7. The electrical connector of claim 5, wherein: the left side and the right side of the through groove are provided with tearing edges extending downwards from the upper end of the base part, the tearing edges and the second elastic arms are torn and formed, the tearing edges protrude inwards towards the through groove relative to the blanking edges, so that an abutting area is formed between the bottom edge of the blanking edges and the top edge of the tearing edges at the upper end of the base part, the jig is used for abutting and pushing the terminal to be downwards assembled in the accommodating groove, the abutting area is arc-shaped, and the joint of the abutting area and the tearing edges is higher than the lowest point of the arc shape.

8. The electrical connector of claim 5, wherein: the terminal is provided with a pair of clamping parts below the base part for clamping a solder ball, and the solder ball part is exposed in the through groove when seen from top to bottom.

9. The electrical connector of claim 5, wherein: the left side and the right side of the first elastic arm are respectively provided with a tapered edge, the distance between the tapered edges is gradually increased from top to bottom, the highest point of the second arc edge is higher than the lowest point of the tapered edge but lower than the highest point of the tapered edge, and the contact position of the contact part and the first elastic arm is positioned between the through groove and the butt joint part.

10. The electrical connector of claim 9, wherein: the upper surface of the insulating body is convexly provided with a plurality of protruding blocks, each protruding block is provided with a supporting surface for supporting the abutting element, when the abutting element downwards abuts against the abutting part to a final position, the tapered edge is positioned between the left adjacent supporting surface and the right adjacent supporting surface when seen from top to bottom, and the rear edge of the supporting surface is positioned in front of the rear edge of the tapered edge.