CN201160146Y - electrical connector terminal - Google Patents

Abstract

The utility model discloses an electric connector terminal for electrically connecting a chip module and a printed circuit board, comprising a holding part, a welding part extending downward from one end of the holding part, and a welding part extending upward from the other end of the holding part. The base, the two sides of the base are respectively bent and extended to extend a first support portion and a second support portion, the first support portion extends upwards to a first elastic arm with a first contact portion at the end, and the second support portion extends upwards to a terminal with a The second elastic arm of the second contact part, the first elastic arm and the second elastic arm are arranged in a cross shape, and the two elastic arms are arranged to increase the elasticity of the entire electrical connector terminal and enhance its mechanical performance. The second contact portion extends in pairs and is electrically connected to the same conductive sheet provided on the chip module at the same time, so that the resistance generated by the two elastic arms on the chip module can be offset by itself, so that the overall friction of the chip module The resistance is reduced.

Description

electrical connector terminal

【Technical field】

The utility model relates to an electrical connector terminal, in particular to an electrical connector terminal whose elasticity can be enhanced.

【Background technique】

An article titled "The Evolution of Microprocessor Packaging" in the third quarter of 2000 of "Intel Technology Journal" introduced some related integrated circuit packaging body. The pin arrangement of these integrated circuit packages is arranged in an LGA (Land Grid Array, planar grid array), which is called an LGA package. The low profile of these LGA packages saves space in the assembly of electronic components.

The LGA socket removably assembles the LGA package onto the printed circuit board. A typical LGA socket is provided with an insulating body between the LGA package body and the printed circuit board, and the insulating body is provided with several channels for accommodating terminals, and the arrangement of these channels is the same as the pin arrangement of the LGA package body. Each terminal is provided with a pair of free ends extending in opposite directions and separated by a certain gap. The two free ends extend out of the outer surface of the insulating body to respectively contact the corresponding contact pads on the bottom surface of the LGA package and the surface of the printed circuit board, thereby electrically connecting the LGA package and the printed circuit board.

Terminals for LGA sockets can be found in Mainland China Patent No. 2674686, which includes a single contact portion on the top and a single soldering portion on the bottom. The single contact portion extends upwards from the upper surface of the socket to contact the corresponding contact pad on the LGA package, and the single welding portion extends downward from the lower surface of the socket to solder to the corresponding solder pad on the printed circuit board. Therefore, the contact pads of the LGA package can be electrically connected to the solder pads of the printed circuit board by using a single contact portion.

However, the terminal elasticity of this single contact arm is not good, and it is prone to elastic fatigue during use. The contact arm will produce an elastic resistance to the chip module. Due to the advancement of science and technology, the miniaturization and density of the LGA socket Due to the increase in the requirements of modernization, the number of terminals is constantly increasing. Since the contact arms of all terminals are assembled in the same direction, the increase in resistance will lead to the phenomenon that some terminals cannot be in contact with the chip module.

Therefore, it is necessary to design a new electrical connector terminal to overcome the above disadvantages.

【Content of utility model】

The purpose of the utility model is to provide an electrical connector terminal, which has better elasticity.

Another object of the present invention is to provide an electrical connector terminal, which automatically cancels the elastic resistance generated by the chip module, and reduces the resistance generated by the chip module as a whole.

In order to achieve the above object, the utility model adopts the following technical solution: an electrical connector terminal, which is used to electrically connect the chip module and the printed circuit board, which includes a holding part, a welding part extending downward from one end of the holding part, and The base portion extending upward from the other end of the holding portion, the two sides of the base extend respectively a first support portion and a second support portion parallel to each other, and the first support portion extends upward to a first elastic arm with a first contact portion at the end, The second support portion extends upwards to a second elastic arm with a second contact portion at the end, the first elastic arm is provided with a first inclined portion inclined upward from the first support portion and extending toward the second support portion, the second elastic arm There is a third slant part extending upward from the second support part and toward the first support part, the first slant part and the third slant part intersect with each other, and the first contact part and the second contact part contact with the chip module at the same time set in contact with the same conductive sheet.

Compared with the prior art, the electrical connector terminal of the utility model increases the elasticity of the entire electrical connector terminal by setting two intersecting elastic arms, and enhances its mechanical performance, and the two contact parts are extended in pairs, so that The elastic resistance produced by each conductive terminal to the chip module cancels itself, and the elastic resistance received by the chip module decreases as a whole.

【Description of drawings】

Fig. 1 is a perspective view of a terminal of the electrical connector of the present invention.

Fig. 2 is a three-dimensional exploded view of the terminal and part of the insulating body of the electrical connector of the present invention.

Fig. 3 is a perspective view of the terminals of the electric connector of the present invention assembled to the insulating body.

FIG. 4 is a cross-sectional view of the perspective view shown in FIG. 3 , wherein the chip module and the printed circuit board are electrically connected to the terminals of the electrical connector.

【Detailed ways】

As shown in FIG. 1 , the electrical connector terminal 1 of the present invention includes a flat holding portion 10 , a welding portion 11 bent and extended downward from one end of the holding portion 10 , and a base portion 12 extending upward from the other end of the holding portion 10 . The base portion 12 is located on the same plane as the holding portion 10 . Both sides of the holding part 10 are provided with a first barb 101, and the top of the base 12 is provided with a second barb 121. Please also refer to FIG. 101 and the second barb 121 interfere with the insulating body 20 at the same time, so that the electrical connector terminal 1 is firmly fixed in the insulating body 20 . One side of the base 12 is bent and extended to extend the first supporting portion 13 , and the other side is bent and extended to extend the second supporting portion 14 . The length of the first support part 13 along the extension direction is greater than the length of the second support part 14 and the top of the second support part 14 is higher than the top of the first support part 13 in the vertical direction, and the two are planar structures arranged roughly in parallel and extend in the same direction. Wherein, the first support portion 13 bends upwards to extend a first elastic arm 16 , and the second support portion 14 bends upwards to extend a second elastic arm 15 . The first elastic arm 16 includes a first inclined portion 163 extending upward from the first supporting portion 13 and extending toward the second supporting portion 14, a first transition portion 162 extending vertically upward from the first inclined portion 163, and a first transition portion 162 extending from the first transition The portion 162 is inclined upward and extends toward the second inclined portion 161 of the first supporting portion 13 , and a curved first contact portion 1611 is provided at the end of the second inclined portion 161 . The second elastic arm 15 includes a third inclined portion 153 extending upward from the second supporting portion 14 and extending toward the first supporting portion 13, a second transition portion 152 extending vertically upward from the third inclined portion 153, and a second transition portion 152 extending from the second transition part 152 is inclined upwards and extends to the fourth inclined part 151 of the second support part 14, and the end of the fourth inclined part 151 is provided with a curved second contact part 1511, wherein the third inclined part 153 is located between the base part 12 and the first inclined part 163 and the two inclined portions cross each other, the first transition portion 162 and the second transition portion 152 are parallel to each other, and the distance from the first transition portion 162 to the second support portion 14 is equal to the distance from the second transition portion 152 to the first support portion 13 Distance, the first contact portion 1611 and the second contact portion 1511 intersect each other and are arranged in pairs, and the first elastic arm 16 can form the second elastic arm 15 after it rotates by itself at a certain angle.

As shown in Figures 2, 3, and 4, only a partial illustration of the insulating body 20 is provided here, and it is provided with an upper surface 21 for receiving the chip module 30 and a lower surface 22 installed on the printed circuit board 40, and the upper surface 21 is provided. There is a terminal receiving hole 210 penetrating through the lower surface 22. After the electrical connector terminal 1 is assembled to the insulating body 20, the first contact portion 1611 and the second contact portion 1511 expose the conductive sheet on the upper surface 21 of the insulating body and the chip module 30. 31 contacts, and the soldering portion 11 is soldered to the printed circuit board 40 through solder balls 50 .

The key structure of the utility model is that: the electrical connector terminal 1 is provided with a first elastic arm 16 and a second elastic arm 15 arranged crosswise, when the chip module 30 is pressed down, the electrical connector terminal 1 has good elasticity, and at the same time the first The contact portion 1611 is arranged in pairs with the second contact portion 1511 , so that the frictional resistance generated by each electrical connector terminal 1 on the chip module 30 can cancel itself, so that the total frictional resistance suffered by the chip module 30 is reduced.

It should be pointed out that the above description is only one embodiment of the utility model, not all or the only implementation manner, any equivalent changes adopted by those of ordinary skill in the art to the technical solution of the utility model by reading the description of the utility model, All are covered by the claims of the present utility model.

Claims (9)

1. An electrical connector terminal for electrically connecting a chip module and a printed circuit board, comprising a holding portion, a welding portion extending downward from one end of the holding portion, and a base extending upward from the other end of the holding portion, the base The first support part and the second support part respectively extend from both sides, the first support part extends upwards to the first elastic arm with the first contact part at the end, and the second support part extends upwards to the end with the second contact part The second elastic arm is characterized in that: the first elastic arm is provided with a first slant portion extending upward from the first support portion and extending toward the second support portion, and the second elastic arm is provided with a first inclined portion inclined upward from the second support portion and extending toward the second support portion. The third inclined portion extending from the first support portion, the first inclined portion and the third inclined portion are arranged to intersect each other. 2. The electrical connector terminal according to claim 1, wherein the first elastic arm further comprises a first transition portion extending vertically upward from the first inclined portion, and a first transition portion inclined upward and downward from the first transition portion. The second slant part extending from the first support part, the end of the second slant part is provided with the first contact part. 3. The electrical connector terminal according to claim 2, wherein the second elastic arm further comprises a second transition portion extending vertically upward from the third inclined portion, and a second transition portion slanting upward and downward from the second transition portion. The fourth sloping part extending from the second support part, the end of the fourth sloping part is provided with a second contact part. 4. The electrical connector terminal according to claim 3, wherein the first transition portion and the second transition portion are parallel to each other. 5 . The electrical connector terminal according to claim 1 , wherein a top end of the second support portion is vertically higher than a top end of the first support portion. 6 . The electrical connector terminal according to claim 1 , wherein first barbs extend from two sides of the holding portion. 7 . 7. The electrical connector terminal according to claim 1, wherein the length of the first supporting portion is greater than the length of the second supporting portion. 8. The electrical connector terminal according to claim 1, wherein the third inclined portion is located between the base portion and the first inclined portion. 9. The electrical connector terminal according to claim 1, wherein the second elastic arm can be formed after the first elastic arm rotates by itself at a certain angle.

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