CN2360949Y

CN2360949Y - Electric coupler

Info

Publication number: CN2360949Y
Application number: CN 98252275
Authority: CN
Inventors: 裴文俊
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: 1998-12-29
Filing date: 1998-12-29
Publication date: 2000-01-26
Anticipated expiration: 2008-12-29

Abstract

The utility model relates to an electric connector, particularly an electric connector which uses a tin ball to connect a terminal and a circuit board and can electrically connect a CPU with the circuit board. The utility model comprises an insulating main body, a plurality of conductive terminals, etc., wherein, the insulating main body is provided with terminal through holes for containing the terminals; the tail end of each terminal is provided with a plane forming a right angle with the extending direction of the terminal; the area of the plane is larger than the cross section area of the terminal; the plane is provided with a positioning structure used for causing the tin ball to be positioned and fixed. In addition, the end edge of each terminal through hole of the insulating main body is provided with a step structure for matching the assembly of the tail end and straightening integral forming planeness, which is good for planting the tin ball and reinforcing welding effect.

Description

Electric connector

The utility model relates to a kind of electric connector, refers to especially between a kind of its terminal and the circuit board can connect the electric connector of central processing unit and circuit board by the tin ball bond.

United States Patent (USP) the 5th, 702, No. 255, the 4th, 822, wait document to disclose a type electric connector No. 288, it mainly is to be applied to computer cpu (Central Process Unit is CPU) with being connected of printed circuit board (PCB).This existing electric connector mainly is to plant in advance in its terminal tails to connect a tin ball, again electric connector is placed on the corresponding contact of printed circuit board (PCB), make tin ball fusing and be connected through heat treated then, thereby reach terminal and the affixed purpose that is integral and makes it to electrically conduct of printed circuit board (PCB) with the contact fusion of circuit board.Being somebody's turn to do the enforcement situation that has connector terminals tail end structure now and plant the tin ball in advance sees also shown in Figure 10, electric connector 5 mainly is made up of insulating body 52 and cylindrical conductive terminal 51, wherein a side of insulating body 52 is made as the composition surface 521 with printed circuit board (PCB) 30 windings, terminal 51 is contained in the insulating body 52, and its tail end 511 exposes outside the composition surface 521 of insulating body 52, when when the tail end 511 of terminal 51 is planted tin ball 23 in advance, engage the local area that its end face 512 is only arranged between this tin ball 23 and the tail end 511, can make tin ball 23 fusings on each terminal 51 through heating steps again and make that corresponding connection pad 31 fixes as one on terminal 51 and the printed circuit board (PCB) 30.

Yet, above-mentioned existing structure is because its terminal tail end protrudes the composition surface certain altitude of insulating body, and the narrow tin ball that is unfavorable for of its face area is planted thereon restfully in advance, thereby, when implanting the tin ball, need keep bigger accuracy, make the course of processing complicated and be difficult to control, and easily cause improper being heated of tin ball and be difficult to keep original sphere, cause the integral planar degree of electric connector to be damaged.In addition, because the contact-making surface between tin ball and the terminal tail end is mainly its end face, and the contact area of this end face is less, and this certainly will make the adhesion between this end face and the tin ball less, influences its steadiness and validity when engaging.And, then take place easily relative rock and near the contact end face, produce concentrated stress, and the robustness after the welding is affected once electric connector is subjected to the external force effect.In addition, when planting the tin ball in advance, because contact area is less and it is not provided with locating structure, also cause the tin ball to be difficult to the tail end of aligned with terminal easily, welding effect is had a greatly reduced quality, and the tin ball after planting in advance also is subjected to the external force effect easily and comes off, cause the operating fault of central processing unit.

The purpose of this utility model is, a kind of electric connector is provided, its terminal is provided with a planar configuration to increase the bonding area of terminal and tin ball, makes that to plant the processing of tin ball in advance at the terminal tail end easy to implement and be easy to aim at joint, thus make between electric connector and the circuit board to engage effect better.

In order to achieve the above object, the utility model mainly is provided with members such as insulating body and conducting terminal, wherein the side that is connected with circuit board of insulating body is made as the composition surface, relative another side then is the interface that docks with central processing unit, is provided with several terminal through-hole that run through insulating body of arranging and can accommodates conducting terminal between composition surface and interface.One side inwall of described terminal through-hole is provided with the terminal tank, and is provided with terrace structure in the ora terminalis on the close composition surface of through hole.Conducting terminal is the lengthwise extended configuration, the one end is made as contact jaw, butt joint can match with the pin of central processing unit, the other end then is made as the plane tail end perpendicular to the terminal bearing of trend, borrow this plane tail end can effectively expand the bonding area of large tin ball and terminal tail end, adhesion between tin ball and the terminal tail end is strengthened, so as to improving its welding effect and firm persistence thereof.But and be located at the installing and fixing of terrace structure mating terminals tail end on insulating body composition surface, and correct the squareness on plane, the integral planar degree of itself and tin ball can be maintained.

In addition, for making the tin ball before and after fusion bond, all can be placed on the terminal tail end plane restfully and keeping good sphere, can adopt modes such as depression profile and the corresponding depressed part of tin ball shape are set on terminal tail end plane, make the tin ball install accurately and engage firm purpose thereby reach.

The utility model and existing associated electrical connector are relatively, adhesion between its terminal tail end and the tin ball is stronger, and the integral planar degree of electric connector terminal and tail end tin ball thereof is kept well, thereby the welding effect between electric connector and the circuit board and firm persistence thereof are better.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the three-dimensional cutaway view of the utility model electric connector part.

Fig. 2 is the partial sectional view of Fig. 1 along the B-B direction.

Fig. 3 is the partial perspective view of the utility model electric connector terminal tail end structure.

Fig. 4 is the partial sectional view of Fig. 2 along the D-D direction.

Fig. 5 is the partial perspective view that the utility model terminal tail end is constructed second embodiment signal.

Fig. 6 is that the utility model electric connector terminal tail end is constructed second embodiment and planted the partial sectional view that connects the tin ball.

Fig. 7 is the partial perspective view that the utility model electric connector terminal tail end is constructed the 3rd embodiment.

Fig. 8 is the partial perspective view that the utility model electric connector terminal tail end is constructed the 4th embodiment signal.

Fig. 9 is the partial sectional view of the utility model the 5th embodiment.

Figure 10 is the partial sectional view that existing connector terminals engages with tin ball and circuit board.

Be illustrated in figure 1 as the partial perspective cutaway view of the utility model electric connector 1.As shown in the figure, electric connector 1 mainly includes members such as insulating body 10 and plurality of terminals 2, wherein insulating body 10 is the plate body, the side that itself and circuit board 30 are abutted against is made as composition surface 12, and the side of carrying and connection central processing unit is made as interface 11, is provided with the terminal through-hole 13 of several perforations between interface 11 and the composition surface 12.Please together with reference to Fig. 2, Fig. 3 and Fig. 4, terminal through-hole 13 inside are provided with the terminal tank 15 in order to ccontaining terminal 2, and are provided with ring ladder structure 14 in terminal through-hole 13 by all sides of the peritreme of insulating body 10 composition surfaces 12 1 ends.Conducting terminal 2 is the lengthwise extended structure, and is contained in the terminal tank 15 of insulating body 10 through holes 13, and the one end extends upwardly to the interface 11 of insulating body 10 and is made as contact jaw 20, constitutes with central processing unit electronic components such as (not shown) to be connected; As for its other end then is to be plane tail end 21, this tail end 21 is to be extended to a lateral buckling by terminal 2 ends, and form a surface 22 in the form of annular discs, the lateral margin on this surface 22 also can be placed in the terrace structure 14 at ora terminalis place of insulating body 10 composition surfaces 12 upper terminal through holes 13, and is subjected to the restriction of this terrace structure 14 and mutually concordant with the composition surface 12 of insulating body 10.Therefore, the relative position of borrowing described terminal tank 15 to match rectifiable terminal 2 and tail end 21 thereof with terrace structure 14 makes the bending angle on tail end 21 surfaces 22 form the integral planar degree of accurate right angle with coordinated insulation body 10 composition surfaces 12.Because terminal 2 tail ends 21 can provide bigger contact area, therefore, when planting tin ball 23 in advance, be easier to aim to plant connect, and also can increase adhesion between tin ball 23 and the terminal 2 whereby, make can increase terminal 2 tail ends 21 surfaces 22 and circuit board 30 connection pads 31 behind the heat fused tin ball 23 fully engage effect.

In addition, the tail end 21 of terminal 2 is when the surface 22 that is provided with to a lateral buckling, the bending degree on its surface 22 and terminal 2 itself can be rough greatly about 88 ° to 90 °, make terminal 2 whereby when accommodating and be fixed in the terminal tank 15 in the through hole 13, can suitably be equipped in the terrace structure 14 at 12 places, insulating body 10 composition surfaces, and be subjected to the restriction of this terrace structure 14 and mutually concordant with the composition surface 12 of insulating body 10, suitably keep the integral planar degree before and after the welding to cooperate the tin ball of planting in advance on these surfaces 22.

Please refer to Fig. 5 and Figure 6 shows that second embodiment of the terminal construction of the utility model electric connector 1.As shown in Figure 5, terminal 2 ' the tail end 21 of electric connector 1 ' surface 22 ' be set to square, this mode of borrowing also can provide bigger contact area and preferable joint effect, and in the insulating body 10 of electric connector 1 ' each through hole 13 ' by the peritreme week side of composition surface 12 ' one ends be provided with the terrace structure 14 that can match with its square contour ', so can guarantee equally terminal 2 ' tail end 21 ' surface 22 ' with the integral planar degree of tin ball 23, be beneficial to the enforcement and the raising stability of terminal 2 ' weld with circuit board 3.

And for example Figure 7 shows that the 3rd embodiment of the utility model electric connector, it mainly is further to be provided with locating structure on terminal 2 tail end 21 surfaces 22 (as shown in Figure 3) in the form of annular discs, this locating structure is the depressed part 24 towards the recessed spherical cambered surface structure of terminal through-hole 13 directions of being located at tail end 21 surfaces 22 in the present embodiment, the profile of this depressed part 24 is roughly the shape of corresponding cooperation tin ball, and its depression scope is less than the area on surface 22.The setting of this depressed part 24 can make the tin ball can more firmly implant and be engaged on the surface 22 of terminal 2 tail ends 21.

Figure 8 shows that the 4th embodiment of the utility model electric connector for another example.Convex with several catch 25 on the periphery of the tail end 21 surperficial 22 (as shown in Figure 3) in the form of annular discs of its terminal 2, that borrows these catch 25 stops that positioning action can make tin ball 23 firmly plant equally and place on terminal 2 tail ends 21 surfaces 22.

For another the 5th embodiment that Figure 9 shows that the utility model electric connector.Wherein, each terminal through-hole 13 of electric connector 1 insulating body 10 relies on all sides of a stomidium edge on composition surface 12 except being provided with terrace structure 14, also further convex with several insulation projections 16 in its all sides appropriate position, these insulation projections 16 also can be brought into play the effect of strong fix tin ball, to improve welding steadiness and accuracy.

As previously discussed, the utility model electric connector 1 is because the special tectonic of its terminal 2, increased when planting tin ball 23 in advance, contact area between terminal tail end 21 and the tin ball 23, and make the adhesion between the two stronger, and 12 upper terminal through holes, the 13 ora terminalis places, composition surface of its insulating body 10 are provided with annular stepped structure 14, the integral planar degree of electric connector terminal 2 and tail end tin ball 23 thereof is kept well, thereby the welding effect between electric connector and the circuit board and firm persistence thereof are better.

Claims

1. electric connector, can be used for the electric connection between central processing unit and the circuit board, and between itself and the circuit board can be one by the tin ball bond, this electric connector comprises insulating body and several conducting terminals, insulating body is a plate body, and the side that itself and circuit board are abutted against is made as the composition surface, and a relative side then is made as interface, be provided with the terminal through-hole that several run through insulating body between composition surface and the interface, can correspondence accommodate plurality of terminals; It is characterized in that the end that terminal extends to the composition surface is made as tail end, this tail end forms energy engage face to accept the tin ball and can provide bigger planting to connect the surface of tin sphere area through suitable bending.

2. electric connector as claimed in claim 1 is characterized in that, the formed surface of terminal tail end is concordant insulating body composition surface and the plane of installing.

3. electric connector as claimed in claim 2 is characterized in that, the tail end of terminal is for being no more than the plane at right angle with respect to terminal bearing of trend bending degree.

4. electric connector as claimed in claim 3 is characterized in that, the tail end of terminal bending is the flat circle plate-like.

5. electric connector as claimed in claim 3 is characterized in that, the tail end of terminal bending is square plane.

6. as claim 4 or 5 described electric connectors, it is characterized in that the plane periphery that the terminal through-hole of insulating body relies on all side corresponding terminals of the peritreme tail end of composition surface one end is provided with terrace structure.

7. electric connector as claimed in claim 6 is characterized in that, the sidewall in the terminal through-hole of insulating body is provided with can accommodate the also terminal containing slot of the described terminal of fixing.

8. electric connector as claimed in claim 7 is characterized in that, the tail end plane of terminal bending is provided with profile and the corresponding depressed part of tin ball shape size.

9. as claim 7 or 8 described electric connectors, it is characterized in that the tail end plane periphery of terminal bending is wholely set several towards the catch away from terminal direction projection.

10. electric connector as claimed in claim 9 is characterized in that, the peritreme week side appropriate position that the terminal through-hole of insulating body relies on composition surface one end is wholely set the projection that several exceed the insulating body composition surface.