Electrical terminal and electrical connector in vertical compression contact with chip module

Abstract

An electrical terminal includes a base, a first elastic arm and a second elastic arm formed side by side by extending upwardly from an upper end of the base, and a protruding portion. The first elastic arm has a mating portion, and the second elastic arm has a contact portion. The protruding portion protrudes and extends from a first side of the first elastic arm, and the first side of the first elastic arm is adjacent to the second elastic arm. A lower surface of the protruding portion has a contact surface overlapping with the contact portion in a vertical direction, such that the contact portion upwardly abuts the contact surface. When the chip module presses downwardly on the electrical terminal, the contact portion can move on the contact surface, such that the chip module does not need to press downwardly on the contact portion with a relatively large pressure.

What is claimed is: 
     
         1 . An electrical connector, configured to be electrically connected to a chip module, the electrical connector comprising:
 a body, having a plurality of accommodating holes running vertically; and   a plurality of electrical terminals, respectively accommodated in the accommodating holes correspondingly, wherein each of the electrical terminals has:
 a base, being flat plate shaped; 
 a strip connecting portion, formed by extending upwardly from an upper end of the base, and configured to be connected to a strip; 
 a first elastic arm formed by extending upwardly from the an upper end of the base, wherein a top portion of the first elastic arm has a mating portion configured to upwardly abut the chip module, a through groove runs through the first elastic arm along a thickness direction of the first elastic arm, one of an upper end and a lower end of the through groove is defined as a first end, and the other of the upper end and the lower end of the through groove is defined as a second end; and 
 a second elastic arm, wherein one of an upper end and a lower end of the second elastic arm is defined as a third end, the other of the upper end and the lower end of the second elastic arm is defined as a fourth end, the third end is integrally connected to the first end, the fourth end is integrally connected to the second end prior to being formed and is broken from the second end after being formed, the second elastic arm has a contact portion, and when the chip module is pressed downwardly on the mating portion to a final position, the contact portion is in contact with the base or the first elastic arm; 
 wherein when the first end is the upper end of the through groove and the second end is the lower end of the through groove, the third end is the upper end of the second elastic arm and the fourth end is the lower end of the second elastic arm; and when the first end is the lower end of the through groove and the second end is the upper end of the through groove, the third end is the lower end of the second elastic arm and the fourth end is the upper end of the second elastic arm. 
   
     
     
         2 . The electrical connector according to  claim 1 , wherein the electrical terminal further has a third elastic arm, a lower end of the third elastic arm is integrally connected to the base and an upper end is integrally connected to the first elastic arm, the first elastic arm and the third elastic arm are located at a left side and a right side of the second elastic arm, a first torn surface is provided on one side of the first elastic arm adjacent to the second elastic arm, a second torn surface is provided on one side of the third elastic arm adjacent to the second elastic arm, and two opposite sides of the second elastic arm are formed correspondingly by tearing from the first torn surface and the second torn surface. 
     
     
         3 . The electrical connector according to  claim 1 , wherein a torn surface is provided on one side of the first elastic arm adjacent to the second elastic arm, the second elastic arm is formed by tearing from the torn surface; the first elastic arm further has a blanking surface, the blanking surface is formed by blanking the second elastic arm, and the blanking surface has an arc surface connected to the torn surface. 
     
     
         4 . The electrical connector according to  claim 1 , wherein the first end is the lower end of the through groove, the second end is the upper end of the through groove, the third end is the lower end of the second elastic arm, the fourth end is the upper end of the second elastic arm, and the first elastic arm has a contact surface overlapping with the contact portion in a vertical direction, such that the contact portion upwardly abuts the contact surface. 
     
     
         5 . The electrical connector according to  claim 1 , wherein the first end is the upper end of the through groove, the second end is the lower end of the through groove, the third end is the upper end of the second elastic arm, the fourth end is the lower end of the second elastic arm, and the contact portion abuts a front surface of the base. 
     
     
         6 . The electrical connector according to  claim 5 , wherein when the chip module does not downwardly abut the mating portion, the contact portion does not abut the base. 
     
     
         7 . The electrical connector according to  claim 1 , wherein each of the electrical terminals has a strip connecting portion formed by extending upwardly from an upper end of the base, and configured to be connected to a strip, the first elastic arm has a vertical portion, and the vertical portion and the strip connecting portion are provided side by side in a left-right direction. 
     
     
         8 . The electrical connector according to  claim 1 , wherein the first elastic arm has a main body portion and an upper portion formed by extending upwardly from the main body portion, the second elastic arm has a first portion and a second portion formed by extending downwardly from the first portion, the second portion is located in front of the main body portion, and the mating portion, the upper portion of the first elastic arm and the first portion of the second elastic arm are located on a same plane. 
     
     
         9 . The electrical connector according to  claim 8 , wherein the second portion has a first section formed by bending forwardly from the first portion and extending downwardly, a second section formed by bending backwardly from the first section and extending downwardly, and the contact portion formed by bending forwardly from the second section and extending downwardly. 
     
     
         10 . The electrical connector according to  claim 1 , wherein two adjacent electrical terminals of the electrical terminals in a front-rear direction are provided to be staggered in the front-rear direction, and viewing from a lateral direction, the second elastic arm of a rear electrical terminal of the two adjacent electrical terminals in the front-rear direction and the first elastic arm of a front electrical terminal of the two adjacent electrical terminals in the front-rear direction at least partially overlap with each other. 
     
     
       11. The electrical connector according to  claim 3 , wherein the blanking surface is located above the torn surface, and the torn surface protrudes from the blanking surface toward the second elastic arm in a left-right direction.  
     
     
       12. The electrical connector according to  claim 11 , wherein a bottom end of the torn surface is lower than a top end of the accommodating hole, and a top end of the blanking surface is higher than the top end of the accommodating hole.  
     
     
       13. The electrical connector according to  claim 1 , wherein each of the electrical terminals has a pair of clamping portions to jointly clamp a solder ball, and viewing from a left-right direction, a gap exists between the first elastic arm and the second arm, and a part of the solder ball is under the gap.  
     
     
       14. The electrical connector according to  claim 1 , wherein a width of the contact portion is greater than a width of the mating portion.  
     
     
       15. The electrical connector according to  claim 1 , wherein a portion of the second elastic arm between the fourth end and the third end is curved and is in front of the base.