CN110718815A - Back panel connector - Google Patents

Abstract

The application relates to a backplane connector, which is applied to the technical field of connectors, and includes a backplane; differential signal pins arranged on the backplane, each two differential signal pins form a group of differential pairs; Shielding system; the shielding system includes at least one shielding unit, each shielding unit includes at least one U-shaped shielding sheet with the same opening direction, a sealing shielding sheet and a ground metal connecting sheet, wherein the sealing shielding sheet is arranged on the last U-shaped shielding sheet along the opening direction On the opening side of the U-shaped shielding sheet, each U-shaped shielding sheet surrounds a group of differential pairs on three sides, and the last group of differential pairs along the opening direction is surrounded on four sides by the U-shaped shielding sheet and the sealing shielding sheet; one end of the grounding metal connection sheet is grounded, and the other One end contacts the U-shaped shielding sheets and the sealing shielding sheets arranged in the first direction in the same shielding unit, or the other end contacts the U-shaped shielding sheets and the sealing shielding sheets arranged in the second direction in different shielding units.

Description

backplane connector

technical field

The present invention relates to the technical field of connectors, in particular to a backplane connector.

Background technique

Backplane connectors are used to transmit high-speed signals, so crosstalk between differential signals needs to be effectively reduced to the greatest extent possible. Usually, backplane connectors include multiple differential pairs and multiple shields, where the differential pair consists of two differential signal pins. The shield surrounds the corresponding differential pair, thereby providing electromagnetic shielding for the corresponding differential pair.

In the related art, the shielding member is a structure surrounded by two sides or three sides, and at least one side is open to electromagnetic interference, resulting in poor shielding performance and poor effect.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a backplane connector in order to overcome the problems existing in the related art at least to a certain extent.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

The present application provides a backplane connector, characterized in that it includes:

bottom plate;

the differential signal pins arranged on the base plate, each two of the differential signal pins form a group of differential pairs;

a shielding system disposed on the backplane and surrounding the differential pair;

The shielding system includes at least one shielding unit, and each shielding unit includes at least one U-shaped shielding sheet with the same opening direction, and one sealing shielding sheet, wherein the sealing shielding sheet is arranged at the last one along the opening direction. On the opening side of the U-shaped shielding sheet, each U-shaped shielding sheet surrounds a group of the differential pairs on three sides, and the last group of the differential pairs along the opening direction is shielded by the U-shaped shielding sheet and the seal The sheet is formed surrounded on all sides.

Optionally, the sealing and shielding sheet is I-shaped, L-shaped or U-shaped.

Optionally, if the sealing and shielding sheet is an I-type, a plurality of the sealing and shielding sheets in different shielding units are formed by stamping an integral metal sheet.

Optionally, the shielding unit further includes: a grounding metal connecting piece, one end of the grounding metal connecting piece is grounded, and the other end contacts each of the U-shaped shielding pieces and all the U-shaped shielding pieces arranged in the first direction in the same shielding unit. The sealing shielding sheet, or the other end contacts the U-shaped shielding sheet and the sealing shielding sheet arranged in the second direction in different shielding units.

Optionally, the bottoms of the U-shaped shielding sheet, the sealing shielding sheet and the grounding metal connecting sheet all include grounding terminals, and the grounding terminals are used to connect with the grounding circuit of the connector, and the bottoms are towards the side of the base plate.

Optionally, the top of the sealing shielding sheet is provided with a guide structure, the top is the other side opposite to the bottom, and the bottom is the side facing the bottom plate.

Optionally, two sides of the U-shaped shielding sheet are provided with elastic sheets, and the corresponding positions of the grounding metal connecting sheet and the elastic sheet are set as fixed parts, or, two sides of the grounding metal connecting sheet are provided with elastic sheets, so Corresponding positions of the U-shaped shielding sheets are provided with fixed portions so as to contact the fixed portions through the elastic sheets.

Optionally, the connector is enclosed in a plastic housing, and the sealing and shielding sheet sequentially includes: a top guide structure, a sealing and shielding sheet main body, a connecting part of the sealing and shielding sheet, a stamping boss of the sealing and shielding sheet, and a sealing and shielding sheet. a grounding terminal; the connecting portion is used for connecting the sealing shielding sheets in different shielding units, and the punching boss is used for increasing the holding force with the plastic casing.

Optionally, the connector is enclosed in a plastic housing, and the U-shaped shielding sheet sequentially includes: a top guide structure, a left side wall of the U-shaped shielding sheet, a right side wall of the U-shaped shielding sheet, and a bottom side wall of the U-shaped shielding sheet. , U-shaped shielding sheet stamping boss, the ground terminal of the U-shaped shielding sheet; the stamping boss is used to increase the retention force with the plastic shell.

Optionally, the connector is enclosed in a plastic housing, and the grounding metal connecting piece sequentially includes: a grounding terminal of the grounding metal connecting piece, a clamping structure of the grounding metal connecting piece, and an assembly buckle position of the grounding metal connecting piece; The clamping structure of the grounding metal connecting sheet is used for clamping the grounding metal connecting sheet on the sealing shielding sheet, and the mounting buckle position of the grounding metal connecting sheet is used for assembling the grounding metal connecting sheet on the on the casing.

By adopting the above technical solutions, the present invention can achieve the following technical effects: in the backplane connector of the present application, the differential signal pins are arranged on the bottom plate, and every two differential signal pins form a group of differential pairs, and the differential pairs are shielded by a shielding system. It will be surrounded, wherein the shielding system includes at least one shielding unit, and each of the shielding units includes at least one U-shaped shielding sheet with the same opening direction and a sealing shielding sheet, because the sealing shielding sheet is arranged along the opening. On the opening side of the last U-shaped shielding sheet in the direction, each U-shaped shielding sheet surrounds a group of the differential pairs on three sides, and the last group of the differential pairs along the opening direction is surrounded by the U-shaped shielding sheet and the differential pair. The sealing shielding sheet is surrounded by four sides. In this way, the opening direction of the U-shaped shielding sheet is the same, so that a group of differential pairs can be surrounded by the U-shaped shielding sheet on three sides, and the opening is surrounded by the U-shaped shielding sheet. The bottom sidewall of the U-shaped shielding sheet is closed, so that the differential pair can be surrounded by four sides; in addition, the last group of the differential pair along the opening direction is blocked by the U-shaped shielding sheet and the sealing shielding sheet Forming surrounded by four sides, in this way, each differential pair on the bottom plate can be surrounded by U-shaped shielding sheet and/or sealing shielding sheet on four sides. Compared with the two-sided or three-sided surrounded structure in the prior art, there will be no one side open. In the case of electromagnetic interference, the shielding performance and effect are better.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

1 is a schematic structural diagram of a backplane connector provided by an embodiment of the present invention;

2 is a schematic structural diagram of a backplane connector provided by another embodiment of the present invention;

3 is a schematic structural diagram of a backplane connector provided by another embodiment of the present invention;

4 is a schematic structural diagram of a backplane connector provided by another embodiment of the present invention;

5 is a schematic structural diagram of a backplane connector provided by another embodiment of the present invention;

6 is a schematic structural diagram of a sealing shield sheet in a backplane connector provided by an embodiment of the present invention;

7 is a schematic structural diagram of a U-shaped shielding sheet in a backplane connector provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a ground metal connection piece in a backplane connector provided by an embodiment of the present invention.

Reference number:

100—plastic shell, 101—base plate, 102—U-shaped shielding sheet, 103—sealing shielding sheet, 104—differential signal pin, 105—grounding metal connection sheet, 201—grounding terminal of U-shaped shielding sheet, 202—, U The limit part of the shielding sheet, 203—the left side wall shrapnel of the U-shaped shielding sheet, 204—the right side wall shrapnel of the U-shaped shielding sheet, 205—the punching boss of the U-shaped shielding sheet, 206—the top of the U-shaped shielding sheet Guide structure, 207—the left side wall of the U-shaped shielding sheet, 208—the right side wall of the U-shaped shielding sheet, 209—the bottom side wall of the U-shaped shielding sheet, 301—the top guide structure of the sealing shielding sheet, 302—the sealing shielding sheet Main body, 303—connecting part of sealing and shielding sheet, 304—stamping boss of sealing and shielding sheet, 305—grounding terminal of sealing and shielding sheet, 501—grounding terminal of grounding metal connecting sheet, 502—grounding metal connecting sheet snap-on structure, 503—A small plastic buckle for the grounding metal connection piece, 504—a large plastic buckle for the grounding metal connection piece.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example

FIG. 1 is a schematic structural diagram of a backplane connector provided by an embodiment of the present invention. As shown in FIG. 1, this embodiment provides a backplane connector, including:

bottom plate 101;

the differential signal pins 104 arranged on the base plate, each two of the differential signal pins form a group of differential pairs;

a shielding system disposed on the backplane and surrounding the differential pair;

The shielding system includes at least one shielding unit, and each shielding unit includes at least one U-shaped shielding sheet 102 with the same opening direction, and one sealing shielding sheet 103, wherein the sealing shielding sheet is arranged along the opening direction. On the opening side of the last U-shaped shielding sheet, each U-shaped shielding sheet surrounds a group of the differential pairs on three sides, and the last group of the differential pairs along the opening direction is surrounded by the U-shaped shielding sheet and the differential pair. The sealing and shielding sheet is surrounded on all sides.

In the backplane connector of the present application, the differential signal pins are arranged on the backplane, and every two differential signal pins form a set of differential pairs, and the differential pairs are surrounded by a shielding system, wherein the shielding system includes at least one shielding Each of the shielding units includes at least one U-shaped shielding sheet with the same opening direction and one sealing shielding sheet. Since the sealing shielding sheet is arranged on the opening side of the last U-shaped shielding sheet along the opening direction, each The U-shaped shielding sheet surrounds a group of the differential pairs on three sides, and the last group of the differential pairs along the opening direction is surrounded by the U-shaped shielding sheet and the sealing shielding sheet on four sides. The opening direction of the shielding sheet is the same, so that a group of differential pairs can be surrounded by the U-shaped shielding sheet on three sides, and the opening is closed by the bottom side wall of the U-shaped shielding sheet surrounding a group of differential pairs in front of it, so that the The differential pair forms a structure surrounded by four sides; in addition, the last group of the differential pairs along the opening direction is surrounded on four sides by the U-shaped shielding sheet and the sealing shielding sheet, so that each differential pair on the bottom plate is surrounded by four sides. Both can be surrounded by U-shaped shielding sheet and/or sealing shielding sheet on all four sides. Compared with the two-sided or three-sided surrounded structure in the prior art, there is no situation where one side is open to electromagnetic interference, and the shielding performance and effect are better. .

In the orientation shown in FIG. 1 , the last group of the differential pairs is the leftmost group of differential pairs.

FIG. 2 is a schematic structural diagram of a backplane connector provided by another embodiment of the present invention, and FIG. 2 is a schematic diagram of another view of the backplane connector in the present application. In the orientation shown in FIG. 2 , the last group of the differential The pair is the rightmost set of differential pairs.

In some embodiments, the sealing and shielding sheet can be, but not limited to, I-shaped, L-shaped or U-shaped. In this embodiment, the structure of the sealing shielding sheet is not limited, and the openings of the last group of U-shaped shielding sheets can be closed.

Figures 3 and 4 are schematic diagrams of the structure of the backplane connector when the sealing and shielding sheets are L-shaped and U-shaped, respectively. When the sealing and shielding sheets are L-shaped and U-shaped, refer to Figures 3 and 4 for the installation method.

Further, if the sealing and shielding sheet is an I-type, a plurality of the sealing and shielding sheets in different shielding units are formed by stamping an integral metal sheet. The sealing and shielding sheet is punched as a whole, which can be more convenient during installation and has better shielding effect.

FIG. 5 is a schematic structural diagram of a backplane connector provided by another embodiment of the present invention. As shown in FIG. 5 , in some embodiments, the shielding unit further includes: a grounding metal connecting piece 105 , one end of the grounding metal connecting piece is grounded, and the other end contacts each of the shielding units arranged in the first direction. Alternatively, the other end of the U-shaped shielding sheet and the sealing shielding sheet is in contact with each of the U-shaped shielding sheets and the sealing shielding sheets arranged in the second direction in different shielding units.

By arranging the grounding metal connecting piece, the U-shaped shielding piece and the sealing shielding piece are connected to each other and conduct, so that they are grounded together, so that the shielding effect is better.

Referring to FIG. 5 , the consistent direction of the openings of the U-shaped shielding sheets is the vertical direction, and the behavior of each sealing shielding sheet is in the horizontal direction. The shielding sheet and the sealing shielding sheet are in contact to achieve common grounding; the U-shaped shielding sheet and the sealing shielding sheet in the same line in different shielding units can also be in contact with each other in the horizontal direction.

Specifically, the bottoms of the U-shaped shielding sheet, the sealing shielding sheet and the grounding metal connecting sheet all include grounding terminals, and the grounding terminals are used to connect with the grounding circuit of the connector, and the bottoms are facing side of the bottom plate.

In some embodiments, the ground terminal may be, but is not limited to, a fisheye terminal.

In the orientation shown in Figure 5 (the bottom plate and ground circuit are not shown), the bottom is the upper part of the figure. The backplane and ground circuits are not shown.

Further, two sides of the U-shaped shielding sheet are provided with elastic sheets, and the corresponding positions of the grounding metal connecting sheet and the elastic sheet are set as fixed parts, or, two sides of the grounding metal connecting sheet are provided with elastic sheets, the Corresponding positions of the U-shaped shielding sheets are provided with fixed parts, so as to contact the fixed parts through the elastic pieces. The shrapnel contact technology is that in the contact design of two metal parts, one side adopts a shrapnel structure with resilience to contact the fixed structure on the other side. This contact structure can repeat the contact action for many times and has high reliability. In this embodiment, the elastic piece can be arranged on either the U-shaped shielding piece or the grounding metal connecting piece.

In some embodiments, the bottom plate can be disposed in the plastic casing 100, or can be integrally formed with the plastic casing. The connector is enclosed in a plastic housing, and the structures of the sealing shielding sheet, the U-shaped shielding sheet, and the grounding metal connecting sheet may refer to the structures in the prior art, or may adopt the structures provided in this application. Specifically, the following embodiments may be referred to.

6 is a schematic structural diagram of a sealing shielding sheet in a backplane connector according to an embodiment of the present invention. Referring to FIG. 6 , the sealing shielding sheet specifically includes: a top guide structure 301 , a sealing shielding sheet main body 302 , and a connection of the sealing shielding sheet 303, the stamping boss 304 of the sealing and shielding sheet, and the ground terminal 305 of the sealing and shielding sheet.

Wherein, the connecting portion is used for connecting the sealing shielding sheets in different shielding units, and the punching boss is used for increasing the holding force with the plastic casing.

The top of the sealing and shielding sheet is provided with a guide structure, the top is the other side opposite to the bottom, and the bottom is the side facing the bottom plate. By arranging the guiding structure, the sealing and shielding sheet can be easily inserted into the bottom plate, and has a good guiding effect when the sealing and shielding sheet is assembled into the plastic casing. The shape of the guiding structure can be any geometric figure, such as: semicircle, trapezoid , triangle, etc.

7 is a schematic structural diagram of a U-shaped shielding sheet in a backplane connector according to an embodiment of the present invention. 7 , the U-shaped shielding sheet sequentially includes: a top guide structure 206, a left side wall 207 of the U-shaped shielding sheet, a left side wall elastic sheet 203 of the U-shaped shielding sheet, a right side wall elastic sheet 204 of the U-shaped shielding sheet, and a U-shaped shielding sheet. The right side wall 208 of the U-shaped shielding sheet, the bottom side wall 209 of the U-shaped shielding sheet, the punching boss 205 of the U-shaped shielding sheet, the ground terminal 201 of the U-shaped shielding sheet, and the limiting portion 202 of the U-shaped shielding sheet.

Wherein, the punching boss is used to increase the holding force with the plastic shell. When the U-shaped shielding sheet is inserted into the bottom plate, the part above the limit part of the U-shaped shielding sheet can be inserted into the plastic shell, and the limit The part below the part is exposed to the outside for insertion into the ground circuit.

FIG. 8 is a schematic structural diagram of a ground metal connection piece in a backplane connector provided by an embodiment of the present invention. Referring to FIG. 8 , the grounding metal connecting piece sequentially includes: a grounding terminal 501 of the grounding metal connecting piece, a clamping structure 502 of the grounding metal connecting piece, an assembly buckle position of the grounding metal connecting piece; the snapping connection of the grounding metal connecting piece The structure is used for clamping the ground metal connection sheet on the sealing shield sheet, and the assembling buckle position of the ground metal connection sheet is used for assembling the ground metal connection sheet on the casing. In FIG. 8 , 503 is a small plastic buckle position for assembling the grounding metal connection piece, and 504 is a large plastic buckle position for assembling the grounding metal connecting piece.

It can be understood that, the same or similar parts in the above embodiments may refer to each other, and the content not described in detail in some embodiments may refer to the same or similar content in other embodiments.

It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for the purpose of description, and should not be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise specified, the meaning of "plurality" means at least two.

Any description of a process or method in the block diagrams or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing a particular logical function or step of the process , and the scope of the preferred embodiments of the invention includes alternative implementations in which the functions may be performed out of the order shown or discussed, including performing the functions substantially concurrently or in the reverse order depending upon the functions involved, which should It is understood by those skilled in the art to which the embodiments of the present invention belong.

It should be understood that various parts of the present invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, various steps or methods may be implemented in software or firmware stored in memory and executed by suitable instruction execution means. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or a combination of the following techniques known in the art: Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, Programmable Gate Arrays (PGA), Field Programmable Gate Arrays (FPGA), etc.

Those skilled in the art can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, and the program can be stored in a computer-readable storage medium. When executed, one or a combination of the steps of the method embodiment is included.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically alone, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, and the like.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (10)

1. A backplane connector, comprising:

a base plate;

the differential signal pins are arranged on the bottom plate, and every two differential signal pins form a group of differential pairs;

a shielding system disposed on the backplane and surrounding the differential pair;

the shielding system comprises at least one shielding unit, each shielding unit comprises at least one U-shaped shielding sheet with the same opening direction and a sealing shielding sheet, wherein the sealing shielding sheet is arranged on the opening side of the last U-shaped shielding sheet in the opening direction, a group of differential pairs is surrounded on three sides of the U-shaped shielding sheets, and the differential pairs are surrounded on four sides by the U-shaped shielding sheets and the sealing shielding sheets in the opening direction.

2. The backplane connector of claim 1, wherein the cover shield is I-shaped, L-shaped, or U-shaped.

3. The backplane connector of claim 2, wherein if the cover shield blades are I-shaped, the plurality of cover shield blades in different ones of the shield units are stamped and formed from a unitary piece of sheet metal.

4. The backplane connector of claim 1, wherein the shielding unit further comprises: and one end of the grounding metal connecting sheet is grounded, and the other end of the grounding metal connecting sheet is contacted with the U-shaped shielding sheets and the sealing shielding sheets which are arranged in the same shielding unit in the first direction, or the other end of the grounding metal connecting sheet is contacted with the U-shaped shielding sheets and the sealing shielding sheets which are arranged in different shielding units in the second direction.

5. The backplane connector of claim 4, wherein the bottom of the U-shaped shield strip, the cover shield strip and the grounding metal connecting strip each include a grounding terminal for connection with a grounding circuit of the connector, the bottom being a side facing the backplane.

6. The backplane connector of claim 1,

the top of the sealing shielding piece is provided with a guide structure, the top is the other side opposite to the bottom, and the bottom is the side facing the bottom plate.

7. The backplane connector of claim 4, wherein the U-shaped shielding plate is provided with spring pieces on two sides thereof, and the grounding metal connecting plate is provided with a fixing portion at a position corresponding to the spring pieces, or the grounding metal connecting plate is provided with spring pieces on two sides thereof, and the U-shaped shielding plate is provided with a fixing portion at a position corresponding to the U-shaped shielding plate so as to contact the fixing portion through the spring pieces.

8. The backplane connector of claim 3, wherein the connector is enclosed in a plastic housing, and the cover shield sequentially comprises: the sealing shielding piece comprises a top guide structure, a sealing shielding piece main body, a connecting part of the sealing shielding piece, a stamping boss of the sealing shielding piece and a grounding terminal of the sealing shielding piece; the connecting part is used for connecting the sealing shielding sheets in different shielding units, and the stamping boss is used for increasing the holding force of the plastic shell.

9. The backplane connector of claim 1, wherein the connector is enclosed in a plastic housing, and the U-shaped shielding plate comprises in sequence: the shielding structure comprises a top guide structure, a left side wall of a U-shaped shielding sheet, a right side wall of the U-shaped shielding sheet, a bottom side wall of the U-shaped shielding sheet, a stamping boss of the U-shaped shielding sheet and a grounding terminal of the U-shaped shielding sheet; the stamping boss is used for increasing the holding force with the plastic shell.

10. The backplane connector of claim 4, wherein the connector is enclosed within a plastic housing, the grounding metal tab comprising in sequence: the grounding terminal of the grounding metal connecting sheet, the clamping structure of the grounding metal connecting sheet and the assembling buckle position of the grounding metal connecting sheet; the clamping structure of the grounding metal connecting sheet is used for clamping the grounding metal connecting sheet on the sealing shielding sheet, and the assembling buckling position of the grounding metal connecting sheet is used for assembling the grounding metal connecting sheet on the shell.

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