CN2697860Y

CN2697860Y - Elecric connector

Info

Publication number: CN2697860Y
Application number: CNU2004200253755U
Authority: CN
Inventors: 萧世伟; 郑朝崇; 黄耀諆
Original assignee: Foxconn Kunshan Computer Connector Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Foxconn Kunshan Computer Connector Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2004-03-10
Filing date: 2004-03-10
Publication date: 2005-05-04
Anticipated expiration: 2014-03-10

Abstract

The utility model provides an electric connector which is used for electrically conducting a chip module in a ball-shaped grid array (BGA) packaging form and a circuit board. The electric connector comprises an isolation body presenting a rectangular structure and a plurality of conductive terminals contained inside the isolation body; each conductive terminal is provided with a middle part, a connecting foot downward extending from the middle part and an elastic arm upward crookedly extending from the middle part; wherein the area of the elastic arm near the free end is convex to the circuit board so as to form an arc part; when the chip module receives force and presses on the conductive terminal, the arc part is coated at the bottom of the contacting ball of the chip module; as a consequence, stable and reliable electrical conduction between the chip module and the conductive terminals is provided.

Description

Electric connector

[technical field]

The utility model is can electrically connect the chip module of a ball-shaped grid array (BGA) packing forms and the electric connector of a circuit board about a kind of.

[background technology]

At present, people extensively adopt a kind of electric connector 9 to electrically connect chip module (not shown) and a circuit board (not shown) of a pad grid array (LGA) packing forms, as depicted in figs. 1 and 2, this type electric connector 9 comprises an insulating body 90 and some conducting terminals 92 that is housed in the insulating body substantially.The rectangular substantially structure of described insulating body which is provided with several through holes 901, all accommodates a conducting terminal 92 in each through hole 901.The pin 922 that described conducting terminal 92 comprises the holding parts 920 that is fixed on the insulating body 90, extend to form from holding parts 920 1 ends, the pars intermedia that extends from the bending of holding parts 920 other ends, the sidepiece 925 that extends from the pars intermedia bending and the elastic arm 926 that extends upward formation from the end tilts of sidepiece 925.Described pin 922 is the piece shape structure substantially, is welded with a tin ball 928 on it.The free terminal of described elastic arm 926 is provided with a protruding curved portions 929 to the chip module bottom surface.

During use, electric connector 9 is placed on the circuit board and the tin ball 928 of conducting terminal 92 and the conducting strip welding conducting on the circuit board, and the placement chip module is on electric connector and make the contact chip of chip module corresponding with each conducting terminal 92.Push chip module downwards, the elastic arm 926 of the contact chip press terminal 92 of chip module deforms it downwards, and the summit is electrically conducted together reliably on the curved portions 929 that an elastic force that makes progress makes the contact chip of chip module and terminal thereby terminal elastic arm 926 produces.Like this, by electric connector 9, circuit board and chip module are electrically conducted.When the elastic arm 926 of chip module press terminal 92, the sidepiece 925 of terminal 92 also will deform, the displacement that the curved portions 929 of that one terminal 92 produces a horizontal direction, because the contact chip of chip module has certain width, even horizontal displacement exists, the curved portions 929 of terminal 92 still can electrically connect reliably with the contact chip of chip module.

Along with the chip module of BGA packing forms by a large amount of application, the shortcoming of above-mentioned electric connector 9 comes out gradually.As shown in Figure 3, the bottom surface of the chip module 7 of BGA packing forms has some contact balls 70 that are welded by spherical or hemispheric scolder.Such chip module 7 optimum state in use be electric connector 9 terminal 92 to the contact ball 70 of chip module 7 provide one towards the positive force of chip module 7 so that the contact ball 70 suffered mutual balances of active force thereby terminal 92 is provided and contacts 70 stable electrical contacts of ball with the sheet metal 80 on electric connection chip module 7 and the circuit board 8.That the one, the last summit of the curved portions 929 of the terminal 92 of electric connector 9 should contact so that positive force to be provided with the following summit that contacts ball 70 of chip module 7.But, in actual use, owing to create conditions and the restriction of manufacturing technology and the existence of horizontal displacement, be difficult to make the last summit of whole terminals 92 to contact with the following summit that contacts ball 70, when terminal 92 connects with the both sides that contact ball 70, contact ball 70 bears the power of a horizontal direction, thereby described horizontal force can not be balanced and makes terminal 92 and the instability that electrically contacts that contacts 70 in ball.

[content of utility model]

The purpose of this utility model provides a kind of electric connector, and it can provide the chip module of ball-shaped grid array (BGA) packing forms and stable, the electric connection reliably between circuit board.

In order to realize above-mentioned purpose, the utility model provides a kind of electric connector, comprises the insulating body of a rectangular structure and is housed in the interior plurality of conductive terminals of insulating body.The pin that each conducting terminal all has a pars intermedia, extend to form downwards from pars intermedia and from the pars intermedia elastic arm that extends to form of bending upwards.Wherein, elastic arm near its free terminal regional protruding to circuit board to form a curved portions.When chip module is stressed when being crimped on the conducting terminal, between chip module and conducting terminal, provide stable, be electrically conducted reliably thereby described curved portions is coated on the bottom of chip module contact site.

Compared with prior art, the electric connector that the utility model provides provides stable, is electrically conducted reliably thereby the curved portions of terminal is coated on the bottom of chip module contact ball when chip module is stressed when being crimped on its conducting terminal between chip module and conducting terminal.

[description of drawings]

Fig. 1 is the stereogram of existing electric connector.

Fig. 2 is the enlarged drawing of existing connector terminals.

Fig. 3 is existing electric connector and the chip module of ball-shaped grid array (BGA) packing forms and the partial sectional view of circuit board winding.

Fig. 4 is the three-dimensional exploded view of electric connector of the present utility model.

Fig. 5 is the stereogram of connector terminals of the present utility model.

Fig. 6 is the assembled sectional view of electric connector of the present utility model.

Fig. 7 is the assembled sectional view of the chip module of electric connector of the present utility model and BGA packing forms.

Fig. 8 is the partial enlarged drawing of Fig. 7.

[embodiment]

As shown in Figure 4, the electric connector 1 that provides of the utility model is used for electrically connecting the chip module 3 and the circuit board (not shown) of ball-shaped grid array (BGA) packing forms.Described electric connector 1 comprises insulating body 10 and the plurality of conductive terminals 20 that is housed in the insulating body 10.

Described insulating body 10 comprises first matrix 100 and second matrix 120 of rectangular structure.First matrix 100 is a platy structure, and position is provided with some bar-shaped trough 101, four bights that are arranged in the middle of it respectively a shrinkage pool 102, and the avris of corresponding shrinkage pool 102 is provided with recess 103.Each shrinkage pool 102 is a blind hole all, and a spring 104 is housed in it, and an end of spring 104 is replaced in shrinkage pool 102.First and second step 105,106 that all has the wedge shape of upper and lower setting in each recess 103.Second matrix 120 also is that platy structure and its size are identical with first matrix 100, position is provided with the rectangular channel 121 with the bar-shaped trough 101 corresponding arrangements of first matrix 100 in the middle of it, and both side edges extends to form the recess 103 corresponding button pawls 123 with first matrix 100 downwards.

As shown in Figure 5, described conducting terminal 20 comprises pars intermedia 200, bends pin 202 that extends to form and the elastic arm 204 that extends to form from the bending of pars intermedia 200 upper ends from pars intermedia 200 lower ends.Wherein, tin ball 203 of the bottom surface of pin 202 welding.Elastic arm 204 near its free terminals regional protruding to circuit board to form a curved portions 206.Pars intermedia 200 both side edges respectively have two tabs 208.The lower part of pars intermedia 200 is housed in the bar-shaped trough 101 of first matrix 100 and thereby the inwall by tab 208 and bar-shaped trough 101 interferes fixed terminal 20.

As shown in Figure 6, second matrix 120 is placed the top of first matrix 100, and make the other end of spring 104 replace lower surface at second matrix 120, the button pawl 123 of second matrix 120 props up first step 105 tops of the recess 103 of first matrix 100 simultaneously.Push second matrix 120 downwards, spring 104 is compressed and buckles pawl 123 and buckles the bottom that is held in first step 105.By spring 104 and the acting in conjunction of buckleing pawl 123 and first step 105, second matrix 120 is retained on first matrix 100, and simultaneously the elastic arm 204 of terminal 20 is housed in the bottom of rectangular channel 121 of second matrix 120 in case the elastic arm 204 of not-go-end 20 is damaged by bad external force.

As shown in Figure 7 and Figure 8, during use, being installed on the circuit board and making the tin ball 203 and circuit board welding conducting of electric connector 1 at first with electric connector 1.Then, push second matrix 120 downwards, spring 104 further is compressed and buckles pawl 123 and buckles on the second step 106 that is held in first matrix 100, and the elastic arm 204 of terminal 20 is in the top of rectangular channel 121.At last, the chip module 3 that placement has some contact balls 30 is on electric connector 1, and the contact ball 30 of chip module 3 partly is housed in the rectangular channel 121 and is carried on the curved portions 206 of terminal 20.The radian of the curved portions 206 of terminal 20 is corresponding with the radian of contact ball 30 bottoms.Strain takes place and produces an elastic force that makes progress in the elastic arm 204 of terminal 20, simultaneously, strain takes place the pars intermedia 200 of terminal 20 makes the curved portions 206 of terminal 20 produce a horizontal displacement, described elastic force and horizontal displacement make curved portions 206 be coated on the bottom periphery of contact ball 30, thus with contact ball 2 electric connections.Like this, by electric connector 1, chip module 3 and circuit board are linked together electrically.

In the strain process of above-mentioned terminal 20, the horizontal displacement of curved portions 206 is subjected to contacting the restriction of ball 30, promptly just be moved horizontally to when contacting the following summit contact of ball 30 when curved portions 206, the pars intermedia 200 of terminal 20 no longer take place strain and curved portions 206 no longer occurred level move.Therefore, limit to some extent with manufacturing process even create conditions, the terminal 20 of electric connector 1 of the present utility model all can provide a positive force perpendicular to chip module 3 to the contact ball 30 of chip module 3, thus with contact between the ball 30 stable, electrically connect reliably.

Claims

1. electric connector, the chip module and the circuit board that have the contact ball in order to electric connection, described electric connector comprises insulating body and is housed in the interior plurality of conductive terminals of insulating body, the pin that each terminal comprises pars intermedia, extend to form from pars intermedia with from pars intermedia to the bending of chip module direction extend to form with chip module contact the contacted elastic arm of ball, it is characterized in that: the elastic arm of described terminal near its free terminal regional protruding to circuit board forming a curved portions, the radian of the radian of described curved portions bottom contacting ball is corresponding.

2. electric connector as claimed in claim 1 is characterized in that: insulating body comprises first matrix and second matrix that is installed on first matrix.

3. electric connector as claimed in claim 2, it is characterized in that: described first matrix has four button pawls, described second matrix has four recesses, has first and second steps of two upper and lower settings in each recess, and the button pawl can hold cooperation with first, second step respectively.

4. electric connector as claimed in claim 3, it is characterized in that: four bights of described first matrix are provided with four shrinkage pools, each shrinkage pool all is in blind hole and its spring to be arranged, and described spring one end is replaced in blind hole and the other end is replaced bottom surface at second matrix.

5. electric connector as claimed in claim 1 is characterized in that: described terminal pin is welded with the tin ball that can connect mutually with circuit board.