CN2706900Y - Electric connector - Google Patents

Abstract

The utility model discloses an electric connector used to make a chip module electrically connect to a printed circuit board, mainly comprising a basal body provided with terminal accommodating slots, conductive terminals accommodated in the terminal accommodating slots of the basal body, a fastening device reelingly arranged at one end of the basal body and a hollow structural press board reelingly arranged at the other end of the basal body. The press board is provided with two pressing arms, and each pressing arm comprises a first arm connected with the rotary arranged end of the press board and a second arm connected with the first arm. The first arm is longer than the second arm, and the connecting position of the first arm and the second arm is provided with an initial pressing point. The distance from the initial pressing point to one end of the press board reelingly arranged on the basal body is shorter than the distance from the initial pressing point to the other end of the press board. So the press board can press on the chip module reasonably and can't tilt in the closing process of the electric connector.

Description

Electric connector

[technical field]

The utility model is about a kind of electric connector, refers to a kind of electric connector of planar grid chip module to the pressing plate of printed circuit board (PCB) and tool improvement that can be used for electrically connecting especially.

[background technology]

The increasingly extensive electronic applications that is applied to of LGA (Land Grid Array) electric connector is used to electrically connect chip module to printed circuit board (PCB).See also Fig. 1, be depicted as a kind of known electric connector 6, holding unit 62 and pressing plate 64 that it comprises matrix 63, be contained in conducting terminal (not icon) in the matrix 63, be connected with group with this matrix 63.Wherein a side of matrix 63 is provided with an ear 630 to the extension of the outside of matrix 63, one end of matrix 63 separately is provided with two solid pressure grooves 632, the centre of matrix 63 is provided with conduction region 633, the junction of conducting terminal extends from conduction region 633, and the installed surface of chip module 8 is provided with the electric conductor that matches with the junction of conducting terminal.

Pressing plate 64 be provided be used to compress chip module 8 by pressure arm 643, holding section 640, and and the clamping part 642 that is oppositely arranged of holding section 640, wherein protrude out 63 by the middle position of pressure arm 643 to matrix 63 directions and be formed with the initial point of application 644, pressing plate 64 penetrates the solid pressure groove 632 of being located at matrix 63 by clamping part 642 and spinning is installed on matrix 63.Holding unit 62 comprises hinged arm 620, bent rod 622 and connecting rod 624, and this connecting rod 624 and ear 630 are in matrix 63 the same sides and connecting rod 624 can rotate between horizontal level and vertical position, and drives bent rod 622 rotations.

In the anabolic process of chip module 8 and this electric connector 6, open connecting rod 624 earlier, promote pressing plate 64 make its end that is arranged with clamping part 642 rotation until its arrive one with the perpendicular position of matrix 63, then chip module 8 is positioned over from top to down in the conduction region 633 of electric connector 6, and the electric conductor of chip module 8 and the junction of conducting terminal are connected, putting down pressing plate 64 again makes its initial point of application 644 be connected to the upper surface of chip module 8, the connecting rod 624 that rotates holding unit 62 at last is below connecting rod 624 is snapped in ear 630, in view of the above, bent rod 622 is 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 that the electric conductor of chip module 8 and the junction elastic stability of conducting terminal connect.

Because pressing plate 64 rotations are installed on matrix 63, bent rod 622 presses in the holding section 640 of pressing plate 64 and makes pressing plate 64 around its end rotation that is provided with clamping part 642 because of stressed, and pressing plate 64 impels its initial point of application 644 further to compress chip module in the process that is rotated down.

Only, as the above analysis, the downforce of initial 644 pairs of chip modules 8 of the point of application is not vertically downward, but has certain angle with vertical direction, and this downforce can be decomposed into a horizontal component and a vertical component, this horizontal component will promote the madial wall that chip module 8 is resisted against matrix 63 1 ends, cause wafer 8 modules be subjected to downforce the time, an end is subjected to frictional force bigger, and its one of relative end is subjected to frictional force less, thereby cause wafer 8 wearing and tearing, or Xiang Yiduan tilts and causes and connect instability.On the other hand, also deformation can take place by pressure arm 643 and cause being moved and no longer being limited to middle position by pressure arm 643 by 643 pairs of chip modules 8 of pressure arm position of exerting pressure in the process of pressing down, and will increase and be not limited only to the initial point of application 644 by 643 pairs of chip modules 8 of pressure arm area of exerting pressure simultaneously, so in the process of pushing, direction, size and the lifting surface area of chip module 8 pressures will constantly change in whole pressurized process.In view of the above, if simply the initial point of application 644 is arranged at by pressure arm 643 central authorities, and do not consider other factors, when pressing down chip module 8, will make chip module 8 because of unbalance stress to an end perk, the part terminal that finally causes being located at conduction region 633 ends can not reliably connect with the corresponding electric conductor of chip module 8.

So, be necessary to design a kind of electric connector to overcome above disappearance.

[utility model content]

The purpose of this utility model is to provide the pressing plate that a kind of tool improves and avoids chip module to upwarp in installation process and the electric connector that keeps good mechanical to connect and electrically connect.

The purpose of this utility model is achieved in that electric connector that the utility model tool improves pressing plate comprises that mainly one has terminal containing slot and accommodates the matrix of accommodating cavity of chip module, be contained in the conducting terminal in this matrix, rotation is installed on the pressing plate of this matrix one end and is installed on the holding unit of the matrix other end with respect to this pressing plate rotation, it is the hollow form structure, the rotation of one end is installed on matrix, this pressing plate is provided with two compression arms, each compression arm comprises the first arm that links to each other with the rotation installation end of pressing plate and second arm that links to each other with the first arm, the length of the first arm is greater than the length of second arm, the junction of the first arm and second arm is formed with initial compression point, this initial compression point is installed on the distance of an end of matrix less than its distance to the other end of pressing plate to the rotation of pressing plate, the width of the first arm is greater than the width of second arm, and second arm caves in to the outside of pressing plate with respect to the first arm.In view of the above, electric connector is in closing course, and pressing plate can rationally apply pressure to chip module makes it perk can not take place.

Compared with prior art, the utlity model has following advantage: in the process of closed pressing plate, perk can not take place in chip module, and guarantees the electric property that electric connector is preferable.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of the known electric connector relevant with the utility model.

Fig. 2 is the three-dimensional exploded view of the utility model electric connector.

Fig. 3 is the stereogram of the utility model electric connector closure state.

Fig. 4 is the stereogram of the utility model electric connector opening.

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.

[embodiment]

See also Fig. 2 to Fig. 5, electric connector 1 of the present utility model 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 its outer race is provided with a reinforced bulkhead 100, and the opposite end of this reinforced bulkhead 100 is formed with a head 108 and an afterbody 102 respectively.Wherein head 108 relative both sides are provided with pivot connected slot 1082, and be provided with dovetail groove 1080 in head 108 centre positions, the both sides of afterbody 102 are respectively equipped with a solid pressure groove 1020, and a sidewall 106 of reinforced bulkhead 100 extends to form an ear 1060 near the outside bending in the position of afterbody 102.The middle body of this matrix 10 is provided with conduction region 104, and the terminal containing slot (not shown) that is provided with arranged in this conduction region 104 is used to accommodate conducting terminal (not shown), and conduction region 104 forms the receiving space of accommodating chip module 2.

Pressing plate 12 is the square plate body of a hollow, and two compression arms 124 that it is formed with the rear and front end and connects the rear and front end, its front end bending have downwards extended to form a holding section 122, and the rear end branch offers two clamping parts 120 that are semiarc shape.Compression arm 124 is an arc elastic arm that bends downwards, it comprises the first arm 1242, second arm 1244 and is in the first arm 1242 and the initial point of application 1244 of second arm, 1244 junctions, this initial point of application 1244 is in the arc apex of the arc compression arm 124 of downward bending, when the compression arm 124 of pressing plate 12 compressed chip module 2, this initial point of application 1244 will be as the initial force application location that just begins to mortgage.The length of the first arm 1242 is greater than the length of second arm 1244, the initial point of application 1244 is with respect to the rear end of the middle position deflection pressing plate 12 of compression arm 124, promptly to the end skew certain distance that is provided with clamping part 120, the width of the first arm 1242 also makes greater than the width of second arm 1244 and is formed with a convex shoulder 1245 in the initial point of application 1240 positions.

Holding unit 14 is roughly L-shaped, and it comprises with matrix 10 articulates and drives bar 140, drives the connecting rod 142 that bar 140 approximate vertical extend with this and be located at the handle 144 that connecting rod 142 is terminal and the edge oppositely is bent to form.Wherein drive bar 140 and comprise that again branch is in the hinged arm 1402 at its two ends and connects the bent rod 1404 of two hinged arms 1402, this bent rod 1404 drives the holding section 122 that bent rod 1404 reliably compresses pressing plate 12 with hinged arm 1402 non-coaxial settings to guarantee connecting rod 142 when rotating.

Electric connector 1 is 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 ear 1060 simultaneously, then clamping part 120 are all penetrated in the corresponding solid pressure groove 1020 so that pressing plate 12 rotations are installed on matrix 10.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 ear 1060 belows, thereby guarantees the retain strength of pressing plate 12 extruding chip modules 2.

When using electric connector 1, to open connecting rod 142 earlier, promote pressing plate 12 make its around end rotation of the clamping part that is provided with 120 of pressing plate 12 until its arrive one with the perpendicular position of matrix 10, then chip module 2 is positioned over from top to down in the conduction region 104 of electric connector 1, and the electric conductor of chip module 2 is contacted with the junction of conducting terminal, put down pressing plate 12 again and make its initial point of application 1240 be connected to the upper surface of chip module 2, and holding section 122 is entered in the dovetail groove 1080.The handle 144 of rotation holding unit 14 drives the holding section 122 that the bent rod 1404 that drives bar 140 is tight against pressing plate 12, connecting rod 142 is snapped in below the ear 1060 at last, in view of the above, make bent rod 1404 be closely buckled on the holding section 122 of pressing plate 12, thereby guarantee the retain strength of pressing plate 12 extruding chip modules 2, and then guarantee that the electric conductor of chip module 2 and the junction elastic stability of conducting terminal connect.

Please refer to Fig. 5 and Fig. 6, when pressing plate 12 has just begun to push chip module 2, pressing plate 12 has certain inclination with respect to matrix 10, this moment, the pressure of initial 1240 pairs of chip modules 2 of the point of application had certain included angle with respect to vertical direction, and this angle will press down with the continuous rotation of pressing plate 12 and reduces until being zero.As shown in Figure 6, because the conducting terminal of electric connector 1 is that elastic pressure contacts with the electric conductor of chip module 2, so but conducting terminal emulation is the resiliency supported to chip module 2.When the initial point of application 1240 has just begun to push chip module 2, its pressure to chip module 2 is F, because junction and the first arm 1242 that the initial point of application 1240 is in the first arm 1242 and second arm 1244 are longer than second arm 1244, so the force application location of this pressure F is in the position that its L end is partial in the center of chip module 2, the angle of this pressure F and vertical direction is A, and the component of its horizontal component and vertical direction is Fx, Fy respectively.The action effect of vertical stress component Fy will impel the L end of chip module 2 downward-sloping, after certain inclination takes place downwards in the L of chip module 2 end, the L end of the action effect energy limited chip module 2 of horizontal component Fx continues downward-sloping, be an arc elastic arm that bends downwards because of compression arm 124 is again, when the initial point of application 1240 is subjected to the support counter-force that makes progress of chip module, elastic deformation takes place and tends to straight in compression arm 124, when the continuation of the L of chip module 2 end is downward-sloping, the point of application of 12 pairs of chip modules 2 of pressing plate will be moved to the position of center line of chip module 2 by the initial point of application 1240.On the other hand, because second arm, 1244 width are less than the width of the first arm 1242, second arm 1244 will be narrower and relative the first arm 1242 to the outside of pressing plate 12 depression, this is arranged so that when compression arm 124 rotations of pressing plate 12 press down chip module 2, only the first arm 1242 compresses chip module 2 and second arm 1244 will not contact with chip module 2, this is provided with and further moves to the center of chip module 2 helping the point of application, the mobile L that will effectively suppress chip module 2 of this point of application holds downward-sloping, thereby guarantees that the conducting terminal of electric connector 1 and the conduction physical efficiency of chip module 2 reliably connect.

It is to be noted: the initial point of application 1244 is with respect to the distance of the back end edge skew of the mediad pressing plate 12 of compression arm 124, should be according to the quantity of conducting terminal, arrange and the factors such as concrete bending shape of compression arm 124, through test observation perk not taking place as far as possible when avoiding chip module 2 pressurizeds is purpose and specifically determine.

Claims (6)

1. electric connector, it comprises: the matrix that is provided with terminal containing slot, be contained in the interior conducting terminal of terminal containing slot of matrix, rotation is installed on the holding unit of an end of matrix, rotation is installed on the pressing plate of the hollow form structure of the matrix other end, this pressing plate is provided with two compression arms, it is characterized in that: each compression arm comprises the first arm that links to each other with the rotation installation end of pressing plate and second arm that links to each other with the first arm, the length of the first arm is greater than the length of second arm, the junction of the first arm and second arm is formed with initial compression point, and this initial compression point is installed on the distance of an end of matrix less than its distance to the other end of pressing plate to the rotation of pressing plate.

2. electric connector as claimed in claim 1 is characterized in that: the width of the first arm is greater than the width of second arm, and second arm caves in to the outside of pressing plate with respect to the first arm.

3. electric connector as claimed in claim 1 or 2 is characterized in that: the junction of the first arm and second arm is formed with the convex shoulder that protrudes out in the hollow frame of pressing plate.

4. electric connector as claimed in claim 1 or 2 is characterized in that: described compression arm is an arc elastic arm that bends downwards, and the initial point of application is in the arc apex of the arc compression arm of downward bending.

5. electric connector as claimed in claim 4 is characterized in that: an end of pressing plate is provided with clamping part, and pressing plate is installed on matrix by the clamping part rotation.

6. electric connector as claimed in claim 5 is characterized in that: an end relative with clamping part of pressing plate has been bent to form the holding section downwards, and holding unit comprises a bent rod, and this bent rod is used for the holding section of clamping platen.