Assembly structure for a connector

The present invention is related to an assembly structure for a high frequency connector, which is mainly formed by two interior connectors stacked, wherein each connector is connected between the transmission conductive paths of a printed circuit board and separated to form a conductive shielding layer, wherein the printed circuit board comprises at least four layers, the top and bottom surface, two connectors and a controller form a first transmission path and a second transmission path, and forms a grounding layer in an intermediate layer of the printed circuit board to shield the first transmission path and the second transmission path, thereby preventing the interference from when two connectors simultaneously transmit high frequency signal so that makes the layout of the circuit more easier and can improve the high frequency impedance and its relative variables.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an assembly structure for a connector and, more particularly, relates to an assembly structure with two stacked connectors which is suitable used in 3 GHz˜6 GHz high frequency transmission.

2. Description of the Related Art

In general, the connector design at present, for concerning to reduce the positioned space on the motherboard, most connectors of the market use the stacked design to increase the plane elements capacity of the motherboard; For example, the U.S. Pat. No. 5,800,207 patent, which is relative to an assembly structure to a connector. But the connector structure of the U.S. Pat. No. 5,800,207 patent just stacks the connectors, it does not has a metal shielding shell molded as a whole, so it can not improve the whole shielding effect after stacking the connectors, namely, the electromagnetic interference (EMI) will be generated due to the noises between the two connectors can not be suitable eliminated, thus it will generate the bad influence to the transmission quality.

Additionally, the U.S. Pat. No. 5,037,330 patent discloses a shielded, stacked electrical connector assembly comprising an upper electrical connector and a lower electrical connector having respective insulating housings, wherein, the upper electrical connector and a lower electrical connector are stacked inside the insulating housings and then a metal shell is covered over the insulating housings, thus making the electrical connector assembly has certain ability of electromagnetic shielding effect; however, the conductive terminal of the aforesaid two connector must be soldered between the conductive surfaces of the printed circuit board, and for matching the requirement of the high frequency transmission, the transmission lines placed on the surfaces must has relative design corresponding to the high frequency characteristic (such as high frequency impedance match); however, it will generate mutually interference that it will further affects the transmission quality when the two connectors simultaneously transmit high frequency signal.

Additionally, the differential high frequency impedance design, its placement consists of one or more pairs of transmission signals (S+,S−), wherein, it further comprises a Signal ground and Chassis ground placed between pairs of transmission signals or other signals for separating, so as to prevent generating from interference and avoid other signals interfering the transmission signals (S+,S−). The distance between the transmission signals (S+,S−) is one of the key parameters that affects the high frequency impedance. Therefore, besides each transmission line has been insulated thus will increase the placement density, the line pitch, line width and line thickness between the two connectors and the controller must either be matched. Furthermore, the adjacent transmission lines of the two connectors also generates mutual inductance and mutual capacitor to form crosstalk interference phenomenon, and the phenomenon will be gotten seriously while the placement density of the printed circuit board being increased, especially, for long distance placement density of the printed circuit board (such as: BUS), thus will increase the difficultly for circuit designing.

Therefore, there needs an assembly structure with two stacked connectors which is suitable used in 3 GHz˜6 GHz high frequency transmission and overcomes the aforesaid drawbacks of the prior art.

SUMMARY OF THE INVENTION

The present invention has been accomplished under the circumstances in view. It is therefore the main object of the present invention to provide an assembly structure for a connector, which can avoid the mutual interference while two connectors are simultaneously transmitting high frequency signals so as to eliminate the aforesaid drawbacks.

It is therefore the second object of the present invention to provide an assembly structure for a connector with simply layout, which can effectively improve the high frequency impedance and its relative variables so as to eliminate the aforesaid drawbacks.

It is therefore still an object of the present invention to provide an assembly structure for a connector, which has well electromagnetic shielding effect between the transmission signals of two connectors.

It is therefore still an object of the present invention to provide an assembly structure for a connector with simply assembly.

It is therefore still an object of the present invention to provide an assembly structure for a connector, which has high stability design.

According to one aspect of the present invention, the first object of the present invention is to provide an assembly structure for a connector. Particularly, the assembly structure for a connector which is mainly formed by two interior stacked connectors, wherein each connector is connected between the transmission conductive paths of a printed circuit board and separated to form a conductive shielding layer, wherein the printed circuit board comprises at least four layers, the top and bottom surface, two connectors and a controller to form a first transmission path and a second transmission path, and forms a grounding layer in an intermediate layer of the printed circuit board to shield the first transmission path and the second transmission path.

Wherein the housing further comprises a first inserting portion and a second inserting portion for containing the two connectors, and the first inserting portion and the second inserting portion further comprises a slot, respectively.

Wherein the first conductive terminal of first connector and the second conductive terminal of second connector are respectively connected to the separated transmission paths of the printed circuit board.

Wherein the printed circuit board further comprises an intermediate layer to shield the first transmission path and the second transmission path between the two surfaces of the printed circuit board.

Wherein the intermediate layer of the printed circuit board can be connected to the signal ground of the transmission path.

Wherein the intermediate layer of the printed circuit board can be insulated to the signal ground of the transmission path.

Wherein the conductive shielding layer further comprises a first shelter and a second shelter.

Wherein the first shelter is formed by bending at opposite direction, so as to form a first elasticity fastener located inside the fixing pillar.

Wherein the first shelter further outwardly extends to form a second elasticity fastener corresponding to the first inserting portion and the second inserting portion, respectively, thereby fixing and fastening the connectors.

Wherein the second shelter is used to shield the first inserting portion from horizontal direction and being vertically downwardly bent to the ground terminal of the printed circuit board, and the bottom portion of the second shelter further comprises a grounding terminal.

Wherein the present invention further comprises an insulated conductive portion, and the insulated conductive portion further comprises a pair of symmetrical holes located at the central portion corresponding to the grounding terminal, and respectively forms a first guiding conductive region and a second conductive region toward to both sides of the central portion, so as to provide the first conductive terminal and the second conductive terminal being inserted into, respectively.

Wherein the insulated conductive portion is located at the frame corresponding to the bottom of a vertical bent of the second shelter.

Wherein the guiding conductive region can be a plurality of separate cavities.

Wherein the guiding conductive region can be a plurality of grooves.

Wherein the present invention further comprises a conductive shell covered over the frame for forming a chassis ground, wherein the conductive shell further comprises a third elasticity fastener located in horizontal direction, and the frame comprises a second slot corresponding to the third elasticity fastener, the conductive shell further comprises a fourth elasticity fastener located in vertical direction.

Wherein the first conductive terminal, the second conductive terminal and the shelter of the conductive shielding layer are parallel.

Wherein the conductive shielding layer is made by molding as a whole method.

These and other features, aspects, and advantages of the present invention will become apparent by a review of the following detailed description of the preferred embodiment of the invention and by reference to the following drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring toFIGS. 1 and 2, which respectively illustrates a top view and a X—X direction sectional view showing of the connector of the present invention according to one prefer embodiment of the present invention. As shown in the Figs., the assembly structure for a connector of the present invention comprises: a frame1, having a first inserting portion12and a second inserting portion13that are vertically separately each other, and the first inserting portion12having a first conductive terminal A, as well as the second inserting portion13having a second conductive terminal B, wherein the grounding terminals (G) are mainly separately arranged between the two ends of the signal terminal pair (S+, S−); at least one electronic element7, having a grounding terminals71,72and signal terminals73,74arranged in sequence; and a printed circuit board (PCB)2, having at least one first surface layer21, a second surface layer22and an intermediate layer23, and the intermediate layer23being insulated with the first surface layer21and second surface layer22, respectively; wherein the first conductive terminal A and the second conductive terminal B are both connected to the transmission paths of the printed circuit board2to form a conductive shielding layer3by separating, thereby forming a ground shielding for insulating the first conductive terminal A and the second conductive terminal B between the intermediate layer23of the printed circuit board2and the conductive shielding layer3, and then forming the Chassis grounding with the external housing (please refer toFIG. 1).

Referring toFIGS. 3 and 4, which respectively illustrates Y—Y and Z—Z direction sectional views showing the connector of the present invention and the printed circuit board connecting to the signal ground according to one prefer embodiment of the present invention. As shown in the Figs., it will mutually form a first transmission path211after the controller7and the first conductive terminal A of the first connector connecting to the first surface layer21; and it will mutually form a second transmission path221after the controller7and the second conductive terminal B of the second connector insulating the intermediate layer23of the printed circuit board2both by passing through the hole41; wherein, the grounding terminals (G) of the first conductive terminal A and the second conductive terminal B are connected to the grounding terminals71,72of the controller7to respectively form signal ground by the first transmission path211and second transmission path221(please refer toFIG. 3); the signal terminal pair (S+, S−) of the first conductive terminal A and the second conductive terminal B are respectively connected to the signal terminals73,74of the controller7to form signal transmission by the first transmission path211and second transmission path221(please refer toFIG. 4). Wherein, the Chassis ground formed by the intermediate layer23can be chosen to connect to the signal terminals73,74or insulated according to the user's requirement.

By using the aforesaid structure, even the first transmission path211and the second transmission path221keeping parallel to transmit signals, the connector structure of the present invention can prevent generating from mutual interference when two connectors are simultaneously transmitting high frequency signals, so as to simplify the circuit layout design.

Referring to FIGS.5,6and7, as shown in the Figs., the assembly structure for a connector according to one prefer embodiment of the present invention mainly comprises: a frame1, having a separate room for respectively containing the first connector and second connector that are mutually stacked (figure not shown), and having a first conductive terminal A and a second conductive terminal B inside the frame1corresponding to the first connector and second connector; conductive shielding layer3, for shielding the internal separately transmission path and connecting to the chassis ground; an insulated conductive portion4, for respectively separately connecting the first conductive terminal A and second conductive terminal B to a first surface layer21, a second surface layer22and an intermediate layer23of the printed circuit board2; and a conductive shell5, for covering over the frame1to form an external conductive shielding.

Wherein, the frame1has a first inserting portion12and a second inserting portion13therein that are vertically separately each other, and the first inserting portion12and second inserting portion13further comprise slots14for containing the grounding terminal (G) and signal terminal pair (S+, S−) of the first conductive terminal A and second conductive terminal B and then provides the first connector and the second connector being inserted into, respectively.

The conductive shielding layer3further comprises a first shelter31and a second shelter32, wherein, the first shelter31is used for shielding the first inserting portion12and the second inserting portion13and is vertical downwardly bent in an opposite position for forming a first elasticity fastener311, and a fixing pillar15is positioned between the first inserting portion12and the second inserting portion13corresponding to the first elasticity fastener311, and the fixing pillar15has a first slot151toward to the first elasticity fastener311for making the first elasticity fastener311be inserted therein so as to provide the first shelter31being fastened inside the fixing pillar15of the frame1; as well as the first shelter31further respectively outwardly extends a second elasticity fastener312corresponding to the first inserting portion12and the second inserting portion13, thereby respectively fixing and locating the connectors; the second shelter32is used for shielding the first inserting portion31from horizontal direction and vertical downwardly bent to extend to the printed circuit board2, and it further comprises grounding terminals321located at its bottom portion for connecting to the intermediate layer23of the printed circuit board2.

The insulated conductive portion4is located at the frame1corresponding to the bottom portion of a vertical bent of the second shelter32, and it further comprises a pair of symmetrical holes41located at the central portion corresponding to the grounding terminal321, and respectively forms a first guiding conductive region42and a second guiding conductive region43toward to both sides of the central portion, wherein the first guiding conductive region42and the second guiding conductive region43are formed a plurality of separate cavities or grooves45so as to respectively provide the first conductive terminal A and the second conductive terminal B being inserted into and the conductive terminal A and second conductive terminal B can be arranged according to the different requirements, such as in the SATA interface, the conductive terminal A and second conductive terminal B are formed grounding channels at both sides of the signal channel by arranging parallel in pairs.

Referring toFIG. 5, which illustrates a disassembly view showing the disassembly view of the connector according to one prefer embodiment of the present invention. As shown in the Fig., the second shelter32is inserted at the central portion of the insulated conductive portion4, and the conductive terminal A and second conductive terminal B is respectively inserted corresponding to the both sides of the second shelter32, thus making the conductive shielding layer3formed by the second shelter32matching up the first shelter31completely shields the conductive terminal A and second conductive terminal B and extends to the transmission paths of the printed circuit board2, and then covering by a conductive shell5and shielding the rear portion of the conductive terminal A by a back plate6, such that the conductive terminal A can directly connect to the first terminal71of the controller7via the first surface layer21of the printed circuit board2to form the first transmission path211(please refer toFIG. 1); and the conductive terminal B can directly connect to the second terminal72of the controller7via the second surface layer22of the printed circuit board2to form the second transmission path221; the second shelter32of the conductive layer3is directly connected to the intermediate layer23for grounding, namely, the first transmission path211and the second transmission path221is respectively parallel to the grounding layer of the intermediate layer23, such that the high frequency signal between them can effectively form coupling match so as to shorten the layout area between the electronic elements7and simplify the layout design of the printed circuit board2.

Additionally, the conductive shell5further comprises a third elasticity fastener51located in horizontal direction and a fourth elasticity fastener52located in vertical direction, and the frame1comprises a supporting bottom groove16and a second slot17corresponding to the third elasticity fastener51, such that the frame1can be covered and fastened inside the conductive shell5by the supporting bottom groove16and second slot17; the bottom portion of conductive shell5also comprises grounding terminals54inserted into the printed circuit board2to form Chassis ground, additionally, the fourth elasticity fastener52and the second elasticity fastener312of the first shelter31of conductive shielding layer3respectively generates a clipping force in an opposite direction to the first connector and second connector so as to effectively increase the stability.

Additionally, the back plate6further comprises a fastening portion61, and has a fifth elasticity fastener53located in the conductive shell5corresponding to the fastening portion61, such that the fastening portion61of the back plate6can be passed through the second slot17of the frame1(please refer toFIG. 5) and then fastened with the fifth elasticity fastener53, so as to let the back plate6be located between the conductive shell5and the frame1.

Furthermore, the first shelter31and the second shelter32can be made by molding as a whole method (not shown), namely, the first conductive terminal A1and second conductive terminal B1can keep parallel to the conductive shielding layer3, thereby effectively reducing the electromagnetic interference, so as to maintain the transmission quality. If the connector structure needs to be disassembled, it only needs to press the elasticity fastener and then the connectors, conductive shielding layer, conductive shell and the back plate will be separated each other, thereby simplifying to disassemble the connector structure.