CN100416937C - Elctric connector - Google Patents

Abstract

The invention relates to an electric connector for connecting chip module and circuit board. The electric connector includes base body, conductive terminal accepted in the base body, press plate hinge jointing to one end of the base body, and a fixed holding device arranged at another end of the base body opposite to the press plate. The press plate includes check-locked portion, check-holding portion and a pair of pressing portions which include first arm, second arm adjacent to the first are and protrudent first contact portion formed because that the width of the first arm is larger than width of the second arm. A critical point exists on the pressing portion, and the level distance from the critical point to the central line of the chip module in longitudinal direction is approximately five twenty-fourth the length of the bottom board of the chip module in longitudinal direction. When the pressing plate presses downwards, if the first contact portion overlaps the critical point, then the chip module will just not cock. In the invention, that the first contact portion is located between the critical point to the central line of the chip module in longitudinal direction can prevent the chip module cocking during the pressing plate presses downwards.

Description

Electric connector

[technical field]

The present invention refers to a kind of electric connector of planar grid chip module to printed circuit board (PCB) that can be used for electrically connecting especially about a kind of electric connector.

[background technology]

Planar grid chip module (LGA IC Package, Land Grid Array Integrated CircuitPackage) the increasingly extensive electronic applications that is applied to of electric connector is used to electrically connect chip module to printed circuit board (PCB).See also Fig. 1, be depicted as a kind of existing electric connector 6, in order to electrically connect chip module 8, this electric connector 6 comprises matrix 63, be contained in the plurality of conductive terminals (not shown) in the matrix 63, the holding unit 62 and the pressing plate 64 that are connected with group with this matrix 63, wherein a side of matrix 63 is provided with projection 630, and matrix 63 middle parts are provided with conduction region 633, holding unit 62 comprises hinged arm 620, bent rod 622 and connecting rod 624, this connecting rod 624 and projection 630 are in matrix 63 the same sides and can rotate between horizontal level and vertical position, and driving bent rod 622 rotations, this pressing plate 64 is provided with holding section 640,640 clamping parts that are oppositely arranged 642 and the portion 644 that exerts pressure in the holding section.When this electric connector 6 is connected with group with chip module 8, chip module 8 is positioned on the matrix 63, pressing plate 64 is against on the chip module 8, the connecting rod 624 that rotate holding unit 62 this moment until connecting rod 624 clamping parts below projection 630, therefore, make bent rod 622 be closely buckled on the holding section 640 of pressing plate 64, thereby guarantee the retain strength of pressing plate 64 extruding chip modules 8, and then guarantee mechanical connection stable between the two.

In these electric connector 6 closing course, earlier chip module 8 is positioned in the conduction region 633 of electric connector 6, all penetrate the clamping part 642 of pressing plate 64 in the solid pressure groove 632 of being located at matrix 63 then and rotary pressure plate 64 makes its portion 644 that exerts pressure compress chip module 8 gradually, but, in the process of compressing, the portion that exerts pressure 644 of pressing plate 64 compresses the base plate 80 of chip module 8 in advance near the end of bayonet part 642, this pressure that acts on base plate 80 can make chip module 8 around being rotated and perk by the place of compressing, the other parts of chip module 8 begin to be compressed gradually then, final chip module 8 is compressed fully, the process that these end elder generation perk other parts were depressed afterwards causes that very easily relative displacement takes place chip module 8 in the conduction region 633 of electric connector 6, cause the terminal of electric connector 6 to contact not even contact with the electrical contact site dislocation of chip module 8, and chip module 8 is installed repeatedly can be caused that in electric connector 6 repeatedly friction takes place for the base plate 80 of chip module 8 and matrix 63, and then cause the wearing and tearing of this place's matrix 63.

Therefore, be badly in need of a kind of electric connector of design to overcome above disappearance.

[summary of the invention]

The object of the present invention is to provide a kind of new electric connector, this electric connector can solve the problem that upwarps and can not keep good mechanical to connect and electrically connect in installation process chips module.

The main technical schemes that the present invention addresses the above problem is such: electric connector of the present invention is used to electrically connect chip module and circuit board, this electric connector mainly comprises a matrix, be contained in plurality of conductive terminals in this matrix, be articulated in the pressing plate of this matrix one end and be located at the holding unit of the matrix other end with respect to this pressing plate, this pressing plate comprises clamping part, holding section and the portion that exerts pressure, the portion of exerting pressure is provided with the first outstanding contact site, and this first contact site is pushed in pressing plate and at first touched chip module in the process.Exert pressure and have a critical point in the portion, this critical point is 5/24ths to the horizontal range of the center line of chip module longitudinally and the ratio N of chip module longitudinally length, the position that first contact site that at first compresses chip module in the portion that exerts pressure at first compresses chip module in critical point between the center line of chip module longitudinally.Because the length approximately equal of the longitudinally of the chip module that the length of the longitudinally of pressing plate is interior with being contained in electric connector, therefore, critical point also is 5/24ths to the horizontal range of the center line of pressing plate longitudinally and the ratio N of pressing plate longitudinally length, thereby the position of first contact site is in critical point between the center line of pressing plate longitudinally.

Compared with prior art, the present invention has following beneficial effect: in pushing the process of pressing plate, the pressing plate at first position of contact chip module is not terminal, but between critical point and pressing plate longitudinally center line, therefore perk can not take place because of pressing plate in chip module, thereby guarantee the electric property that electric connector is preferable, and can avoid the base plate of chip module and the matrix of electric connector that the friction and the changing of the relative positions take place.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of existing electric connector related to the present invention, has shown also among the figure that preparation is filled to the chip module of this electric connector.

Fig. 2 is the three-dimensional exploded view of electric connector of the present invention, has shown also among the figure that preparation is filled to the chip module of this electric connector.

The stereogram of Fig. 3 electric connector closure state of the present invention, chip module has been loaded into this electric connector.

Fig. 4 is the stereogram of electric connector opening of the present invention.

Fig. 5 is the cutaway view of Fig. 3 along the V-V direction.

Fig. 6 is the force analysis schematic diagram after chip module and electric connector are installed.

Fig. 7 is the electric connector terminal of the present invention schematic diagram of arranging.

[embodiment]

See also Fig. 2 to Fig. 5, electric connector 1 of the present invention is used to electrically connect chip module 2 to printed circuit board (PCB), and it comprises matrix 10, pressing plate 12 and holding unit 14.Matrix 10 is box structure, and comprise that insulating body 100 and frame be located at the reinforced sheet 101 of insulating body 100 peripheries, reinforced sheet 101 1 ends are the afterbody 102 that both sides are provided with solid pressure groove 1020, be provided with head 108 in reinforced sheet 101 relative these afterbody 102 1 sides, these head 108 relative both sides are provided with pivot connected slot 1082, and are provided with dovetail groove 1080 in head 108 centre positions.Position male in reinforced sheet 101 1 sidewalls 106 close afterbodys 102 is provided with projection 1060, this insulating body 101 is provided with conduction region 104, the plurality of terminals accepting groove 103 that is provided with arranged in this conduction region 104 is used to accommodate plurality of conductive terminals (not shown), and conduction region 104 forms the receiving space of accommodating chip module 2.

Pressing plate 12 is included in the clamping part 120 of one end bending setting and the holding section 122 that 120 bendings of relative clamping part are provided with, in the other two ends of pressing plate 12 is the portion that exerts pressure 124 that compresses chip module 2, and this pressing plate 12 can be in perpendicular to the position of matrix 10 and be parallel between the position of matrix 10 and rotate.In present embodiment, the first outstanding contact site 1240 that this portion 124 that exerts pressure comprises the first arm 1242, second arm 1244 that links to each other with the first arm 1242 and forms greater than the width of second arm 1244 because of the width of the first arm 1242, in fact, the formation of first contact site also has other modes, such as directly outstanding from the portion of exerting pressure.When pressing down pressing plate 12, can perk for guaranteeing chip module 2, need clearly this perk and first contact site 1240 at first to compress relation between the position of the point of application of chip module 2, make a concrete analysis of that details are as follows:

See also Fig. 6, the length of the longitudinally of the base plate 20 of this chip module 2 is D, and D=2d, the position of the point of application that this chip module 2 is subjected to the active force p of first contact site 1240 is e to the horizontal range of the center line of these chip module 2 longitudinallies, and this point of application is f to the horizontal range of the side of the longitudinally of chip module 2, being d=e+f, is ξ along the axial variable of x. $N=\frac{e}{D},$ Wherein N represents the position of the point of application of active force p of first contact site 1240 to the horizontal range of the center line of these chip module 2 longitudinallies and the ratio of chip module longitudinally length.The angle that chip module 2 tilts under the effect of this power p is θ, is Y along the axial displacement of y.See also Fig. 7, according to arranging of the terminal shown in this figure, terminal arrange evenly and when 0≤X≤d/2 and-numbers of terminals in the zone of d/2≤X＜0 be d/2＜X＜d and-d＜X＜-half of numbers of terminals in d/2 regional, the approximate in view of the above coefficient of elasticity of setting terminal: when 0≤X≤d/2 and-during d/2≤X＜0, the coefficient of elasticity of terminal is roughly k/3; When d/2＜X＜d and-d＜X＜-during d/2, the coefficient of elasticity of terminal is roughly 2k/3.See also Fig. 6, first contact site of pressing plate 12 is pressed 1240 processes of supporting chip module 2, and its change in location can be divided into two aspects: first aspect is along the axial vertical displacement of y; Be to form rotating relative to x axle initial point in the plane jointly on the other hand in x axle and y axle.

Please referring to formula $K_{\mathrm{\&Delta;}}=2({\&Integral;}_0^{d/2}\frac{1}{3}\mathrm{kd\&xi;}+{\&Integral;}_{\frac{d}{2}}^{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="C20041005910600141.png,C20041005910600151.png"\; state="\{\{state\}\}">d</figure-callout>}}\frac{2}{3}\mathrm{kd\&xi;})=\mathrm{kd}$ [1.], K wherein _ΔExpression is when total coefficient of elasticity of chip module integral body all terminals when the axial decline displacement of y is Δ.According to the relation of elastic force and coefficient of elasticity and displacement as can be known, $\mathrm{\&Delta;}=\frac{p}{k_{\mathrm{\&Delta;}}}$ 【②】。According to the terminal coefficient of elasticity regularity of distribution as can be known, the coefficient of elasticity integration to the terminal of x direction of principal axis unit length is represented on the equal sign right side of formula [1.].

Please referring to formula $K_{\mathrm{\&theta;}}\mathrm{\&theta;}=2({\&Integral;}_0^{d/2}\frac{1}{3}\mathrm{k\&theta;}{\mathrm{\&xi;}}^{2}d\mathrm{\&xi;}+{\&Integral;}_{\frac{d}{2}}^{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="C20041005910600141.png,C20041005910600151.png"\; state="\{\{state\}\}">d</figure-callout>}}\frac{2}{3}\mathrm{k\&theta;}{\mathrm{\&xi;}}^2\mathrm{d\&xi;})=\frac{5}{12}{d}^3\mathrm{k\&theta;}$ [3.], k wherein _θθ represents chip module torque of x axle initial point relatively in x axle and the common plane of forming of y axle, and the equal sign right side is calculated this torque according to the arranging rule of terminal.According to the relation of torque and power and distance as can be known, k _θθ=pe[4.].

Please referring to Fig. 7, by the geometrical relationship among the figure as can be known, Y=tg θ d-Δ, but because θ is very little, and tg θ is approximately equal to θ, so, Y=θ d-Δ [5.], by formula [4.] as can be known $\mathrm{\&theta;}=\frac{\mathrm{pe}}{k_{\mathrm{\&theta;}}},$ By formula [2.] as can be known $\mathrm{\&Delta;}=\frac{p}{k_{\mathrm{\&Delta;}}},$ Substitution formula [5.] can draw Y=θ d-Δ=ped/k θ-p/k _Δ[6.], comprehensive formula [1.], [3.], [6.] can draw $Y=\frac{p}{\mathrm{kd}}(\frac{12e}{5d}-1).$

So, when $e=\frac{5\mathrm{<figure-callout\; id="12"\; label="d"\; filenames="C20041005910600131.png,C20041005910600161.png"\; state="\{\{state\}\}">d</figure-callout>}}{12}$ The time, promptly $N=\frac{5}{24}$ The time, Y=0, this position is the optimum position, is to apply pressure on the chip module 2 on the pressing plate 12 and critical point that can not make the point of application of chip module perk, first contact site 1240 is positioned at this point, then applies pressure to chip module and can not make chip module generation perk; When $N>\frac{5}{24}$ The time, Y＞0, then electric connector 1 can occur as drawback described in the prior art; If the point of application, promptly between the chip module lengthwise center line, 2 of chip modules can perk in critical point in the position of first contact site.In fact, the length approximately equal on the length of the longitudinally of pressing plate 12 and chip module 2 longitudinallies, thereby the position of first contact site 1240 also is between the center line of critical point and pressing plate 12 longitudinallies.Simultaneously, after pressing plate 12 is pressed on the chip module 2, the center line of pressing plate 12 longitudinallies is close to the center line of the longitudinally of chip module and overlaps, thereby the definition of critical point also can be: this ratio to the distance of pressing plate 12 longitudinally center lines and the length of pressing plate 12 longitudinallies is 5/24.

When the rule of arranging of the terminal of electric connector 1 changes, above-mentioned computational methods stand good, and the above-mentioned formula of parameter substitution that only needs to change owing to the change of the rule of arranging of terminal gets final product.

Please in conjunction with consulting Fig. 2 to Fig. 5, holding unit 14 is roughly L shaped, it comprise with matrix 10 articulate drive bar 140, with this handle 144 that drives connecting rod 142 that bar 140 approximate vertical extend and extend in connecting rod 142 terminal edges and 142 one-tenth certain angles of inclination of connecting rod, this connecting rod 142 can rotate between horizontal level and vertical position.

When this electric connector 1 in when assembling, first driving in the pivot connected slot 1082 that bar 140 is inserted in head 108 with holding unit 14, connecting rod 142 and handle 144 place matrix 10 to be provided with a side of projection 1060 simultaneously, and the clamping part 120 with pressing plate 12 all penetrates in the solid pressure groove 1020 of being located at matrix 10 then.When using electric connector 1, chip module 2 is placed horizontally in the conduction region 104 of matrix 10, the handle 144 that rotates holding unit 14 then drives the bent rod 1404 that drives bar 140 and is tight against the holding section 122 of pressing plate 12 and holding section 122 is entered in the dovetail groove 1080, make the first arm 1242 of pressing plate compress chip module 2 connecting rod 142 rotations again, at last handle 144 is fastened in projection 1060 belows, thereby keeps the retain strength of pressing plate 12 extruding chip modules 2.

In present embodiment, first contact site 1240 is to borrow the first arm 1242 and different formation of second arm, 1244 width, and as mentioned above, first contact site 1240 satisfies following condition in the position in the portion that exerts pressure 124 of pressing plate 12, promptly, the position of first contact site 1240 also is between the center line of critical point and pressing plate 12 longitudinallies, and the definition of critical point, is 5/24 for this ratio to the distance of pressing plate 12 longitudinally center lines and the length of pressing plate 12 longitudinallies then.From the above mentioned, can draw at first contact site 1240 and be under the situation of critical point, the second narrower arm 1244 with the length ratio of the first arm 1242 of broad on pressing plate 12 longitudinallies is:

N’＝(D/2-5D/24)/(D/2+5D/24)＝7/17。

Above-mentioned ratio is to draw under first contact site 1240 is in the situation of position of critical point, because first contact site can be in critical point between the pressing plate 12 longitudinally center lines, therefore above-mentioned second arm 1244 should satisfy 7/17≤N '≤1 with the length ratio of the first arm 1242.

In addition, when first contact site 1240 is positioned at critical point, first contact site 1240 to the distance of chip module 2 center lines is 5D/24, then first contact site 1240 to the distance at the edge of chip module 2 is 7D/24, thereby, the edge of first contact site 1240 to the distance of the center line of chip module 2 and first contact site to chip module 2 apart from approximately equal.

It below only is a kind of execution mode of realizing the object of the invention, promptly, utilize the different the first arm of width 1242 and second arm 1244 to form first contact site 1240 that at first contacts with chip module, in fact, utilize other modes also can realize purpose of the present invention, and reach identical technique effect, such as, from the portion of exerting pressure 124, directly protrude out first contact site, as long as this first contact site, or gets final product between chip module lengthwise center line in critical point between the pressing plate lengthwise center line in critical point.

Claims (15)

1. electric connector, be used to electrically connect chip module, this electric connector comprises the matrix of tool terminal containing slot, be contained in the plurality of conductive terminals in the terminal containing slot, chip module is fixed in holding unit and pressing plate in the matrix, on this pressing plate, be provided with the portion of exerting pressure, it is characterized in that: have a critical point in the portion that exerts pressure, this critical point is 5/24ths to the horizontal range of the center line of chip module longitudinally and the ratio N of chip module longitudinally length, and the radicals by which characters are arranged in traditional Chinese dictionaries of exerting pressure compress the first contact site position of chip module earlier and arrive between the center line of chip module longitudinally in this critical point.

2. electric connector as claimed in claim 1, it is characterized in that: second arm that the portion of exerting pressure comprises the first arm and links to each other and be provided with the first arm, and the width of the first arm is greater than the width of second arm, and first contact site is promptly formed by the width difference of the first arm and second arm.

3. electric connector as claimed in claim 2, it is characterized in that: the matrix of electric connector comprises that insulating body and frame be located at the reinforced sheet of insulating body periphery, reinforced sheet one end is the afterbody that both sides are provided with the solid pressure groove, be provided with head in relative this afterbody one side of reinforced sheet, the relative both sides of this head are provided with pivot connected slot.

4. electric connector as claimed in claim 3 is characterized in that: pressing plate is included in the clamping part of one end bending setting and the holding section that the bending of relative clamping part is provided with, and the clamping part of pressing plate all penetrates in the solid pressure groove of being located at reinforced sheet.

5. electric connector as claimed in claim 4, it is characterized in that: holding unit is roughly L shaped, and it comprises and drives bar, drives connecting rod that the bar approximate vertical extends and the handle that extends in connecting rod end with this, the driving in the pivot connected slot that bar is inserted in reinforced sheet of holding unit.

6. electric connector, comprise matrix with plurality of terminals accepting groove, be contained in the interior conducting terminal of plurality of terminals accepting groove of matrix, be provided with the pressing plate of clamping part and holding section, it is characterized in that: be provided with the portion of exerting pressure in this pressing plate, second arm that this portion of exerting pressure is provided with the first arm and is connected with the first arm, wherein the width of the first arm is greater than the width of second arm, and second arm and the first arm length are than between 7/17～1, width difference because of the first arm and second arm in the portion that exerts pressure of pressing plate forms first contact site, exert pressure and have a critical point in the portion, this critical point is that 5/24ths, the first contact site position is arrived between the center line of chip module longitudinally in this critical point to the horizontal range of the center line of chip module longitudinally and the ratio N of chip module longitudinally length.

7. electric connector, mainly comprise: matrix with plurality of terminals accepting groove, be contained in the interior conducting terminal of plurality of terminals accepting groove of matrix, be provided with the pressing plate of clamping part and holding section, be provided with the portion of exerting pressure in this pressing plate, it is characterized in that: the portion of exerting pressure is provided with first contact site, and there is a critical point in the portion that exerts pressure, this critical point to the length ratio of the distance of the center line of pressing plate longitudinally and pressing plate longitudinally is that 5/24, the first contact site is promptly between this critical point and pressing plate lengthwise center line.

8. electric connector as claimed in claim 7, it is characterized in that: second arm that the portion of exerting pressure comprises the first arm and links to each other and be provided with the first arm, and the width of the first arm is greater than the width of second arm, and first contact site is promptly formed by the width difference of the first arm and second arm.

9. electric connector as claimed in claim 8, it is characterized in that: the matrix of electric connector comprises that insulating body and frame be located at the reinforced sheet of insulating body periphery, reinforced sheet one end is the afterbody that both sides are provided with the solid pressure groove, be provided with head in relative this afterbody one side of reinforced sheet, the relative both sides of this head are provided with pivot connected slot.

10. electric connector as claimed in claim 9 is characterized in that: pressing plate is included in the clamping part of one end bending setting and the holding section that the bending of relative clamping part is provided with, and the clamping part of pressing plate all penetrates in the solid pressure groove of being located at reinforced sheet.

11. electric connector as claimed in claim 10, it is characterized in that: this electric connector also comprises the holding unit that can be installed on the matrix, this holding unit is roughly L shaped, it comprises and drives bar, drives connecting rod that the bar approximate vertical extends and the handle that extends in connecting rod end with this, the driving in the pivot connected slot that bar is inserted in reinforced sheet of holding unit.

12. electric connector, be used to electrically connect chip module, this electric connector comprises the matrix of tool terminal containing slot, be contained in the plurality of conductive terminals in the terminal containing slot, chip module is fixed in holding unit and pressing plate in the matrix, on this pressing plate, be provided with the two relative portions that exert pressure, it is characterized in that: each portion that exerts pressure by the first arm and second arm connection that is provided with that links to each other with the first arm form, and the first arm two exert pressure width on portion's line direction greater than second arm at two width of exerting pressure on portion's line direction, between the first arm and second arm because different formation first contact sites of width, this first contact site presses down in pressing plate and at first compresses chip module in the process, exert pressure and have a critical point in the portion, this critical point is that 5/24ths, the first contact site position is arrived between the center line of chip module longitudinally in this critical point to the horizontal range of the center line of chip module longitudinally and the ratio N of chip module longitudinally length.

13. electric connector as claimed in claim 12, it is characterized in that: the matrix of electric connector comprises that insulating body and frame be located at the reinforced sheet of insulating body periphery, reinforced sheet one end is the afterbody that both sides are provided with the solid pressure groove, be provided with head in relative this afterbody one side of reinforced sheet, the relative both sides of this head are provided with pivot connected slot.

14. electric connector as claimed in claim 13 is characterized in that: pressing plate is included in the clamping part of one end bending setting and the holding section that the bending of relative clamping part is provided with, and the clamping part of pressing plate all penetrates in the solid pressure groove of being located at reinforced sheet.

15. electric connector as claimed in claim 14, it is characterized in that: holding unit is roughly L shaped, it comprises and drives bar, drives connecting rod that the bar approximate vertical extends and the handle that extends in connecting rod end with this, the driving in the pivot connected slot that bar is inserted in reinforced sheet of holding unit.

Images