Circuit board assembly and communication equipment

Abstract

The embodiment of the invention discloses a circuit board assembly and communication equipment, relates to the technical field of communication, and solves the problem that the error is large when two existing circuit boards are assembled into a large-size circuit board. The circuit board assembly comprises at least two circuit boards, a first connecting beam and a positioning pin. Wherein the at least two circuit boards comprise a first circuit board and a second circuit board, a first connecting groove is formed in the first side face of the first circuit board, a first connecting protrusion is arranged at the position, opposite to the first connecting groove, of the second side face of the second circuit board, and the first connecting protrusion is spliced with the first connecting groove. The first connecting beam is arranged on the same side surface of the first circuit board and the second circuit board and located at the splicing position of the first circuit board and the second circuit board. The first circuit board, the second circuit board and the first connecting beam are connected through the positioning pins.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a circuit board assembly and a communication device. Background Art

[0002] A circuit board is one of the core components in a communication terminal device. It is used to carry various components and connect various components through the circuits on the circuit board to achieve the transmission and control of electrical signals. In some application scenarios, it is necessary to connect two circuit boards with smaller sizes into a circuit board with a larger size. However, when connecting two existing circuit boards, a large error will be introduced, resulting in a large error after their assembly. For example, when inserting a line card connector onto the connectors of two circuit boards at the same time, since the assembly error between the two circuit boards exceeds the mutual mating tolerance between the line card connector and the connectors on the circuit boards, it is easy to cause the problem of "pin collision" when the line card connector mates with the connectors of the two circuit boards. Summary of the Invention

[0003] Embodiments of this application provide a circuit board assembly and a communication device, which solve the problem of large error in assembling two existing circuit boards into a large-sized circuit board.

[0004] To achieve the above object, this application adopts the following technical solutions:

[0005] In a first aspect, embodiments of this application provide a circuit board assembly. The circuit board assembly includes two or more circuit boards, a first connection beam, and positioning pins. Taking the circuit board assembly including two circuit boards as an example, the two circuit boards are a first circuit board and a second circuit board respectively. A first connection groove is provided on a first side surface of the first circuit board, and a first connection protrusion is provided at a position on a second side surface of the second circuit board opposite to the first connection groove. The first connection protrusion is spliced with the first connection groove. The first connection beam is disposed on the same side surface of the first circuit board and the second circuit board, and is located at the splicing position of the first circuit board and the second circuit board. The positioning pins can connect the first circuit board, the second circuit board, and the first connection beam.

[0006] In the circuit board assembly according to the embodiments of the present application, the first circuit board and the second circuit board can be processed into milled boards by a milling machine. The processing accuracy of the first connection groove of the first circuit board and the first connection protrusion of the second circuit board is high. When assembling the circuit board assembly, the first connection groove and the first connection protrusion can be fitted together after splicing. Then, the first circuit board and the second circuit board are assembled and positioned on the first connection beam through positioning pins. At this time, the surface of the first connection beam that fits with the first circuit board and the second circuit board is used as the assembly plane standard, ensuring the coplanarity consistency of the first circuit board and the second circuit board in the Z direction. At the same time, high-precision positioning pins can be used, and the assembly clearance between the positioning pins and the first circuit board and the second circuit board is small, which can absorb the assembly errors of the first circuit board and the second circuit board in the X direction and the Y direction. Therefore, if the wire card connector needs to be plugged into the connectors on the first circuit board and the second circuit board, it can ensure the normal mutual matching of the wire card connector with the connectors on the first circuit board and the second circuit board, and avoid the problem of "pin collision".

[0007] Based on the above structure, in some embodiments of the present application, a second connection protrusion is further provided on the first side surface of the first circuit board, and a second connection groove is further provided at a position on the second side surface of the second circuit board opposite to the first connection protrusion. The second connection groove and the second connection protrusion are spliced. The circuit board assembly includes a plurality of positioning pins. Some (some means one or more) positioning pins connect the splicing portion of the second connection protrusion and the second connection groove to the first connection beam, and another part of the positioning pins connect the splicing portion of the first connection protrusion and the first connection groove to the first connection beam. Therefore, the first circuit board and the second circuit board can be spliced alternately, which can further absorb the tolerances of the first circuit board and the second circuit board, and make the coplanarity of the first circuit board and the second circuit board higher in all directions.

[0008] Moreover, in some embodiments, a plurality of the first connection grooves and a plurality of the second connection protrusions can be provided on the first side surface of the first circuit board. The plurality of first connection grooves and the plurality of second connection protrusions are alternately distributed along the length direction of the first side surface. Correspondingly, a plurality of the first connection protrusions and a plurality of the second connection grooves are provided on the second side surface of the second circuit board. The plurality of first connection protrusions and the plurality of second connection grooves are alternately distributed along the length direction of the second side surface. And, the plurality of first connection grooves are respectively spliced with the plurality of first connection protrusions. The plurality of second connection protrusions are respectively spliced with the plurality of second connection grooves. Some positioning pins respectively connect the splicing portions of the plurality of first connection grooves and the plurality of first connection protrusions to the first connection beam, and some other positioning pins respectively connect the splicing portions of the plurality of second connection protrusions and the plurality of second connection grooves to the first connection beam. Thus, the first circuit board and the second circuit board can be spliced alternately at multiple places, further absorbing the tolerances of the first circuit board and the second circuit board, and making the coplanarity of the first circuit board and the second circuit board higher.

[0009] It should be noted that a part of the above positioning pin can be crimped inside the first circuit board. Moreover, a first positioning hole is formed on the first connecting protrusion of the second circuit board, and the first positioning hole extends along the thickness direction of the second circuit board. And a second positioning hole is formed at a position on the first connecting beam opposite to the first positioning hole, and the second positioning hole extends along the thickness direction of the first connecting beam. The part of the positioning pin exposed outside the first circuit board can be sequentially sleeved in the first positioning hole and the second positioning hole. For example, the first end of the positioning pin can be pressed into the first circuit board by a press, and the second end of the positioning pin is located outside the first circuit board to ensure a relatively high alignment accuracy between the positioning pin and the first circuit board. The first positioning hole pre-formed on the second circuit board and the second positioning hole pre-formed on the first connecting beam can be directly sleeved outside the second end of the positioning pin, which can also ensure a relatively high alignment accuracy between the positioning pin and the second circuit board and the first connecting beam. Thus, the positioning accuracy of the positioning pin with the first circuit board and the second circuit board is improved.

[0010] The above positioning pin can adopt various types of pins. In some embodiments of the present application, the above positioning pin includes a pin column and a pin cap. A locking protrusion is formed on the outer periphery of the pin column, and the part of the pin column where the locking protrusion is formed is crimped inside the first circuit board, and the locking protrusion is pressed against the hole wall of the crimping hole of the first circuit board, thereby realizing the locking of the two. And a locking threaded hole is provided at one end of the pin column located inside the first circuit board. The pin cap has an external thread, and the pin cap can be threadedly connected to the locking threaded hole of the pin column. Thus, the further locking of the positioning pin with the first circuit board is realized.

[0011] After the positioning pin positions the first circuit board, the second circuit board, and the first connecting beam, it is also necessary to connect the first circuit board, the second circuit board, and the first connecting beam to each other. In some embodiments of the present application, the above circuit board assembly further includes a first fastener, and the first fastener fixedly connects the first circuit board and the first connecting beam. Thus, the first circuit board is fixed on the first connecting beam.

[0012] Moreover, in some embodiments of the present application, the above circuit board assembly further includes a second fastener, and the second fastener fixedly connects the second circuit board and the first connecting beam. Thus, the second circuit board is fixed on the first connecting beam.

[0013] If the circuit board assembly includes three circuit boards or more than three circuit boards, then any two adjacent circuit boards can adopt the same structure as the connection structure between the first circuit board and the second circuit board above. Details are not described herein one by one.

[0014] In addition, for some circuit boards with a relatively low thickness, such as the second circuit board, in order to further improve the plugging and unplugging reliability of the circuit board, in some embodiments of the present application, the above-mentioned circuit board assembly further includes a reinforcing rib, and the reinforcing rib is arranged on one side of the second circuit board. Moreover, the reinforcing rib is connected to the second circuit board. The reinforcing rib can improve the strength of the second circuit board, thereby preventing the second circuit board from deforming when plugging and unplugging devices on the second circuit board.

[0015] To achieve the connection between the above-mentioned circuit board assembly and the rack in the communication device, in some embodiments of the present application, the above-mentioned circuit board assembly further includes a second connecting beam, and the second connecting beam is used to connect the first circuit board to the rack of the communication device where the circuit board assembly is located. The second connecting beam can be connected to the first circuit board through fixing members such as pins, screws, etc., and is connected to the rack of the communication device where the circuit board assembly is located. Thus, the first circuit board is fixed to the rack through the second connecting beam.

[0016] The above-mentioned second circuit board can also be connected to the rack in the communication device. In some embodiments of the present application, the above-mentioned circuit board assembly further includes a third connecting beam, and the third connecting beam is used to connect the second circuit board to the rack of the communication device where the circuit board assembly is located. The third connecting beam can be connected to the second circuit board through fixing members such as pins, screws, etc. Thus, the second circuit board is fixed to the rack through the third connecting beam.

[0017] In a second aspect, an embodiment of the present application further includes a communication device, including a rack and the circuit board assembly described in the above embodiment. The circuit board assembly is arranged on the rack. Since the circuit board assembly in the communication device of the embodiment of the present application has the same structure as the circuit board assembly described in the above embodiment, both can solve the same technical problems and achieve the same technical effects, which will not be elaborated here. Description of the Drawings

[0018] In order to illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be described below.

[0019] Figure 1 It is a schematic structural diagram of some components in the router of the embodiment of the present application;

[0020] Figure 2 It is an exploded view of the first backplane in the router of the embodiment of the present application;

[0021] Figure 3 It is a three-dimensional structural diagram of the first backplane in the router of the embodiment of the present application;

[0022] Figure 4 It is an exploded view of the second backplane in the router of the embodiment of the present application;

[0023] Figure 5Schematic diagram of the three - dimensional structure of the second backplane in the router of the embodiment of the present application;

[0024] Figure 6 Exploded view of the third backplane in the router of the embodiment of the present application;

[0025] Figure 7 Schematic diagram of the three - dimensional structure of the third backplane in the router of the embodiment of the present application;

[0026] Figure 8 In (a) and (b), they are respectively schematic diagrams of the assembly process of the first circuit board and the positioning pin of the backplane in the router of the embodiment of the present application;

[0027] Figure 9 In (a) and (b), they are respectively schematic diagrams of the assembly process of the second circuit board, the first connecting beam and the positioning pin of the backplane in the router of the embodiment of the present application;

[0028] Figure 10a Exploded view of the positioning pin of the backplane in the router of the embodiment of the present application;

[0029] Figure 10b Bottom view of the positioning pin of the backplane in the router of the embodiment of the present application;

[0030] Figure 10c Schematic diagram of the three - dimensional structure of the positioning pin of the backplane in the router of the embodiment of the present application;

[0031] Figure 11 Cross - sectional view of the backplane in the router of the embodiment of the present application;

[0032] Figure 12 Partial cross - sectional view of the backplane with the first fastener and the second fastener in the router of the embodiment of the present application;

[0033] Figure 13 Cross - sectional view of the backplane with reinforcing ribs in the router of the embodiment of the present application;

[0034] Figure 14 Schematic diagram of the three - dimensional structure of the backplane with reinforcing ribs in the router of the embodiment of the present application;

[0035] Figure 15 Schematic diagram of the three - dimensional structure of the backplane with three circuit boards in the router of the embodiment of the present application;

[0036] Figure 16 Cross - sectional view of the backplane with the first fastener and the second fastener in the router of the embodiment of the present application;

[0037] Figure 17 Cross - sectional view of the backplane with the second connecting beam and the third connecting beam in the router of the embodiment of the present application;

[0038] Figure 18 This is a schematic three-dimensional structure diagram of the backplane with a second connecting beam and a third connecting beam in the router according to an embodiment of the present application;

[0039] Figure 19 This is a schematic cross-sectional diagram of the backplane with a second connecting beam and a third connecting beam and a third connecting beam and a reinforcing rib in the router according to an embodiment of the present application.

[0040] Reference numerals in the drawings:

[0041] 1000 - Router; 100 - Rack; 200 - Backplane; 1 - First circuit board; 101 - First side; 102 - First surface; 103 - First connection hole; 11 - First connection groove; 12 - Second connection protrusion; 2 - Second circuit board; 201 - Second side; 202 - Second surface; 203 - Second connection hole; 204 - Third surface; 21 - First connection protrusion; 22 - Second connection groove; 211 - First positioning hole; 212 - Third positioning hole; 3 - First connecting beam; 301 - Second positioning hole; 302 - Fourth positioning hole; 303 - First threaded hole; 304 - Second threaded hole; 4, 4a, 4b - Positioning pins; 401 - First end; 402 - Second end; 41 - Pin post; 411 - Locking protrusion; 412 - Locking hole; 42 - Pin cap; 5 - First fastener; 6 - Second fastener; 7 - Reinforcing rib; 8 - Third circuit board; 9 - Second connecting beam; 10 - Third connecting beam; 300 - Control board; 400 - Interface board. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

[0043] Hereinafter, terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0044] In addition, in the present application, orientation terms such as "upper", "lower", "left", "right", "horizontal" and "vertical" are defined relative to the orientation of the components shown in the drawings. It should be understood that these directional terms are relative concepts, and they are used for relative description and clarification, and they may change accordingly with the change of the orientation of the components placed in the drawings.

[0045] In this application, unless otherwise clearly defined and limited, the term "connection" shall be understood in a broad sense. For example, "connection" can refer to the connection of mechanical structures and physical structures. It can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium. It can also be understood that components are in physical contact and electrically conductive, or it can be understood as a form of connection between different components in a circuit structure through an entity line such as a PCB copper foil or a wire that can transmit electrical signals.

[0046] This application provides a communication device, which may include an optical line terminal (OLT) device, a wavelength division device, a data communication device, etc. For example, the communication device is a router, a switch, or a modem, etc. The specific form of the above communication device is not particularly limited in the embodiments of this application. For the convenience of description below, the communication device is taken as the router shown as Figure 1 an example for illustration.

[0047] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of some components in the router provided in some embodiments of this application. The router 1000 includes a frame 100, a backplane 200, a control board 300, and an interface board 400. The backplane 200, the control board 300, and the interface board 400 are arranged on the frame 100. Among them, both the control board 300 and the interface board 400 can be installed on the backplane 200 through connectors such as. The control board 300 is used for performing routing calculations, maintaining routing tables, transmitting routing information, etc. The interface board 400 performs forwarding processing of packet input or output. In some examples, the interface board 400 can have the processing capabilities of a routing table cache and other complex problems. The backplane 200 is responsible for forwarding packets between the control board 300 and the interface board 400. The control board 300, the backplane 200, and the interface board 400 can all be circuit boards.

[0048] Since the size and area of the backplane 200 are relatively large, in some scenarios, two or more circuit boards need to be connected into a large-sized circuit board to obtain the required-sized backplane 200. When the control board 300 and the interface board 400 are plugged into the backplane 200, the backplane 200 needs to maintain a certain insertion and extraction strength to avoid deformation problems of the backplane 200 caused by the insertion and extraction operations. Moreover, for some devices plugged at the connection of two circuit boards in the backplane 200, the connection accuracy of these two circuit boards needs to be relatively high, otherwise there may be a risk of "pin collision".

[0049] Therefore, in order to avoid the above problems, the embodiments of this application propose an improved backplane structure. Taking the backplane 200 being spliced by two circuit boards as an example, the backplane 200 of the embodiments of this application will be described below. Refer toFigure 2 and Figure 3 The backplane 200 includes a first circuit board 1 and a second circuit board 2. Among them, the first side surface 101 of the first circuit board 1 faces the second side surface 201 of the second circuit board 2. A first connection groove 11 is provided on the first side surface 101 of the first circuit board 1, and a first connection protrusion 21 is provided at a position on the second side surface 201 of the second circuit board 2 opposite to the first connection groove 11. The first connection protrusion 21 is spliced with the first connection groove 11. The first connection groove 11 of the first circuit board 1 and the first connection protrusion 21 of the second circuit board 2 can be processed by a milling machine. That is, the first circuit board 1 and the second circuit board 2 can be milling boards. The processing precision of the first connection groove 11 of the first circuit board 1 and the first connection protrusion 21 of the second circuit board 2 is high, reducing the tolerances of the first circuit board 1 and the second circuit board 2.

[0050] The backplane 200 of the embodiment of the present application further includes a first connection beam 3 and a positioning pin 4. The first connection beam 3 is provided on the same side surface of the first circuit board 1 and the second circuit board 2 and is located at the splicing position of the first connection groove 11 of the first circuit board 1 and the first connection protrusion 21 of the second circuit board 2. And the first connection beam 3 can be located on the first surface of the first circuit board 1 (i.e., the T surface of the first circuit board 1, that is, the top surface of the first circuit board 1) 102 and the second surface of the second circuit board 2 (i.e., the T surface of the second circuit board 2, that is, the top surface of the second circuit board 2) 202. The positioning pin 4 assembles and positions the first circuit board 1, the second circuit board 2 and the first connection beam 3.

[0051] When assembling the backplane 200, the first connection groove 11 and the first connection protrusion 21 can be fitted after splicing. When the first circuit board 1 and the second circuit board 2 are assembled and connected to the first connection beam 3 through the positioning pin 4, the surface of the first connection beam 3 that fits with the first circuit board 1 and the second circuit board 2 is used as the assembly plane standard, ensuring the coplanarity consistency of the first circuit board 1 and the second circuit board 2 in the Z direction. At the same time, the positioning pin 4 can adopt a high-precision positioning pin, and the assembly gap between the positioning pin 4 and the first circuit board 1 and the second circuit board 2 is small, which can absorb the assembly errors of the first circuit board 1 and the second circuit board 2 in the X direction and the Y direction. Therefore, if the line card connector needs to be plugged into the connectors on the first circuit board 1 and the second circuit board 2, it can ensure the normal mutual matching of the line card connector with the connectors on the first circuit board 1 and the second circuit board 2 and avoid the problem of "pin collision".

[0052] It should be noted that the length of the above-mentioned first connection groove 11 can be the same as the length of the first side surface 101 of the first circuit board 1. That is Figure 2The first connection groove 11 shown penetrates the entire length direction of the first side surface 101 (i.e., the Y-axis direction). Correspondingly, the length of the first connection protrusion 21 is the same as the length of the second side surface 201 of the second circuit board 2. That is, the first connection protrusion 21 is provided on the entire second side surface 201 and extends along the length direction of the second side surface (i.e., the Y-axis direction). Alternatively, the above-mentioned first connection groove 11 may also be distributed only in a partial area of the first side surface 101. Correspondingly, the first connection protrusion 21 is also provided in a partial area of the second side surface 201. This application does not limit the size of the distribution areas of the first connection groove 11 and the first connection protrusion 21.

[0053] In some embodiments of the present application, as Figure 4 shown, the above-mentioned first connection groove 11 is only distributed in a partial area of the first side surface 101. The first side surface 101 of the first circuit board 1 is further provided with a second connection protrusion 12. A second connection groove 22 is also provided at a position on the second side surface 201 of the second circuit board 2 opposite to the first connection protrusion 21. Referring to Figure 5 , the second connection groove 22 is spliced with the second connection protrusion 12. Figure 5 The dashed line in

[0054] represents the splicing line of the first circuit board 1 and the second circuit board 2. The backplane 200 further includes two or more positioning pins 4. Taking two positioning pins 4 as an example, one positioning pin 4a connects the splicing portion of the second connection protrusion 12 and the second connection groove 22 to the first connection beam 3, and the other positioning pin 4b connects the splicing portion of the first connection protrusion 21 and the first connection groove 11 to the first connection beam 3. The first circuit board 1 and the second circuit board 2 can be spliced alternately, which can further absorb the tolerances of the first circuit board 1 and the second circuit board 2, making the coplanarity of the first circuit board 1 and the second circuit board 2 higher in all directions.

[0054] It should be noted that the above-mentioned first connection groove 11 and the second connection protrusion 12 may be distributed at intervals on the first side surface 101 of the first circuit board 1, or may be arranged in sequence as Figure 4 shown. Moreover, the first connection groove 11 and the second connection protrusion 12 may jointly cover a partial area of the first side surface 101, or may jointly cover the entire first side surface 101. For example, the first connection groove 11 covers half of the first side surface 101, and the second connection protrusion 12 covers the other half of the first side surface 101, as Figure 4 shown.

[0055] In some embodiments, as Figure 6 and Figure 7As shown, a plurality of the first connection slots 11 and a plurality of the second connection protrusions 12 are provided on the first side surface 101 of the first circuit board 1. The plurality of first connection slots 11 and the plurality of second connection protrusions 12 are alternately distributed along the length direction of the first side surface 101. The alternate distribution means that there is one second connection protrusion 12 between two first connection slots 11, and there is one first connection slot 11 between two second connection protrusions 12. Similarly, correspondingly, a plurality of the first connection protrusions 21 and a plurality of the second connection slots 22 are provided on the second side surface 201 of the second circuit board 2. The plurality of first connection protrusions 21 and the plurality of second connection slots 22 are alternately distributed along the length direction of the second side surface 201. That is, there is one second connection slot 22 between two first connection protrusions 21, and there is one first connection protrusion 21 between two second connection slots 22. Moreover, the plurality of first connection slots 11 and the plurality of first connection protrusions 21 are respectively arranged opposite to each other, and the plurality of second connection protrusions 12 and the plurality of second connection slots 22 are respectively arranged opposite to each other. The plurality of first connection slots 11 and the plurality of first connection protrusions 21 are respectively spliced correspondingly. The plurality of second connection protrusions 12 and the plurality of second connection slots 22 are respectively spliced correspondingly. A part of the plurality of positioning pins 4 connects the splicing parts of the plurality of first connection slots 11 and the plurality of first connection protrusions 21 to the first connection beam 3, and another part of the plurality of positioning pins 4 connects the splicing parts of the plurality of second connection protrusions 12 and the plurality of second connection slots 22 to the first connection beam 3. Figure 7 The dashed line in Figure 7 indicates the splicing line between the first circuit board 1 and the second circuit board 2. Thus, the first circuit board 1 and the second circuit board 2 can be spliced alternately at multiple places, further absorbing the tolerances of the first circuit board 1 and the second circuit board 2, and making the coplanarity of the first circuit board 1 and the second circuit board 2 higher.

[0056] The above mainly describes the distribution of the splicing structure between the first circuit board 1 and the second circuit board 2. Regarding the positioning connection of the first circuit board 1, the second circuit board 2 and the first connection beam 3 by the positioning pins 4, the alignment accuracy among the three needs to be ensured to improve the assembly accuracy of the backplane 200. In some embodiments of the present application, a part of the positioning pins 4 can be crimped into the first circuit board 1. For example, as shown in (a) and (b) in Figure 8 , the first end 401 of the positioning pin 4 is pressed into the first circuit board 1 from the first end 401 of the first circuit board 1 through a crimping machine. The crimping machine can crimp a plurality of positioning pins 4 simultaneously and align them with the preset positions on the first circuit board 1 respectively. Therefore, the alignment accuracy between the positioning pins 4 and the first circuit board 1 can be ensured. Figure 8

[0057] Figure 9 Moreover, a through hole as shown in Figure 9 is formed on the first connection protrusion 21 of the second circuit board 2. Figure 9The first positioning hole 211 shown in (a) extends along the thickness direction of the second circuit board 2 (the thickness direction is parallel to the Z-axis direction). Moreover, a second positioning hole 301 is formed at a position on the first connecting beam 3 opposite to the first positioning hole 211, and the second positioning hole 301 extends along the thickness direction of the first connecting beam 3 (the thickness direction is parallel to the Z-axis direction). The second end 402 of the positioning pin 4 is located outside the first circuit board 1. The second end 402 of the positioning pin 4 can be sequentially sleeved in the first positioning hole 211 and the second positioning hole 301, as shown in Figure 9 shown in (b). The first positioning hole 211 pre-formed in the second circuit board 2 and the second positioning hole 301 pre-formed in the first connecting beam 3 can be sequentially sleeved outside the second end 402 of the positioning pin 4, which can ensure that the alignment accuracy between the first circuit board 1, the second circuit board 2, and the first connecting beam 3 is relatively high. Thus, the positioning accuracy of the positioning pin 4 with respect to the first circuit board 1, the second circuit board 2, and the first connecting beam 3 is improved.

[0058] For the second circuit board 2 provided with the second connecting groove 22, a third positioning hole 212 as shown in Figure 6 is formed in the second connecting groove 22 of the second circuit board 2, and the third positioning hole 212 also extends along the thickness direction of the second circuit board 2. Correspondingly, a fourth positioning hole 302 is formed at a position on the first connecting beam 3 opposite to the third positioning hole 212, and the fourth positioning hole 302 also extends along the thickness direction of the first connecting beam 3. Some portions of the positioning pin 4 located outside the first circuit board 1 can be directly sequentially sleeved in the third positioning hole 212 and the fourth positioning hole 302. The third positioning hole 212 pre-formed in the second circuit board 2 and the fourth positioning hole 302 pre-formed in the first connecting beam 3 can be directly sleeved outside the second end 402 of the positioning pin 4, further ensuring that the alignment accuracy between the positioning pin 4 and the second circuit board 2 and the first connecting beam 3 is relatively high. Thus, the positioning accuracy of the positioning pin 4 with respect to the first circuit board 1, the second circuit board 2, and the first connecting beam 3 is further improved.

[0059] Moreover, the positioning pin 4 in the embodiments of the present application can adopt various types of pins, and the present application does not limit this. In some embodiments of the present application, referring to Figure 10a 、 10band 10c, the above-mentioned positioning pin 4 includes a pin post 41 and a pin cap 42. Among them, a locking protrusion 411 is formed on the outer periphery of the pin post 41. The portion of the pin post 41 where the locking protrusion 411 is formed (i.e., the first end 401) can be crimped into the first circuit board 1, and when crimped, the locking protrusion 411 can be pressed against the hole wall of the crimping hole (the hole formed by crimping) of the first circuit board 1, thereby realizing the locking between the two. And, a locking threaded hole 412 is provided at one end of the pin post 41 located inside the first circuit board 1 (i.e., the first end 401). The pin cap 42 has an external thread. The pin cap 42 is provided with an external thread, and the pin cap 42 can be threadedly connected to the locking threaded hole 412 of the pin post 41, as Figure 11 shown. Thus, the circumferential locking of the positioning pin 4 is realized, and the locking effect is good. The above-mentioned pin post 41 can be cylindrical, that is, the above-mentioned positioning pin 4 is a cylindrical positioning pin. Or, the positioning pin 4 can also be a conical positioning pin, and the present application does not limit this.

[0060] Among them, the above Figure 10a , 10b and the locking protrusion 411 shown in 10c is in the shape of a long strip tooth and extends along the length direction of the pin post 41. The locking protrusion 411 in the embodiment of the present application can also adopt other shapes, such as serrated, hemispherical, etc., and the present application does not limit this.

[0061] In addition, in addition to using the above-mentioned positioning pin 4 to position the first circuit board 1, the second circuit board 2 and the first connecting beam 3, it is also necessary to fixedly connect the first circuit board 1, the second circuit board 2 and the first connecting beam 3. In some embodiments of the present application, the above-mentioned circuit board assembly further includes as Figure 12 shown a first fastener 5, and the first fastener 5 can fixedly connect the first circuit board 1 and the first connecting beam 3. Thus, the first circuit board 1 is fixed on the first connecting beam 3.

[0062] Exemplarily, as Figure 12 shown, a first connection hole 103 is formed on the above-mentioned first circuit board 1, and a first threaded hole 303 is formed on the first connecting beam 3. After the positioning pin 4 connects the first circuit board 1, the second circuit board 2 and the first connecting beam 3, the first threaded hole 303 can be aligned with the first connection hole 103. For example, the first fastener 5 can be a screw or a threaded pin. The first fastener 5 can be threadedly connected to the first threaded hole 303 through the first connection hole 103. Thus, the first circuit board 1 and the first connecting beam 3 are fixed.

[0063] Similarly, in some embodiments of the present application, the above-mentioned circuit board assembly further includes as Figure 12 shown a second fastener 6, and the second fastener 6 fixedly connects the second circuit board 2 and the first connecting beam 3. Thus, the second circuit board 2 is also fixed on the first connecting beam 3. Exemplarily, as Figure 12As shown, the second circuit board 2 is provided with a second connection hole 203, and the first connection beam 3 is provided with a second threaded hole 304 corresponding to the first connection hole 103. After the positioning pin 4 connects the first circuit board 1, the second circuit board 2 and the first connection beam 3, the second threaded hole 304 can be aligned with the second connection hole 203. For example, the second fastener 6 can be a screw or a threaded pin. The second fastener 6 can be threadedly connected to the second threaded hole 304 through the second connection hole 203. Thus, the second circuit board 2 is fixed to the first connection beam 3.

[0064] Moreover, there will be certain machining errors in the first connection groove 11 and the second connection protrusion 12 of the first circuit board 1, and the first connection protrusion 21 and the second connection groove 22 of the second circuit board 2. Therefore, there will be Figure 12 a relatively small assembly gap A at the connection between the first connection groove 11 and the first connection protrusion 21 as shown, and there will also be a relatively small assembly gap at the connection between the second connection protrusion 12 and the second connection groove 22. These assembly gaps can be absorbed or reduced during the assembly process of the first fastener 21 with the first connection hole 103 and the first threaded hole 303, and the assembly of the second fastener with the second circuit board 2 and the first connection beam 3.

[0065] The above mainly describes the positioning structure and the fixed connection structure of the first circuit board 1, the second circuit board 2 and the first connection beam 3. It should be noted that taking the second circuit board 2 as an example, if the second circuit board 2 is a high-speed backplane, the thickness of the second circuit board 2 can be made relatively low to reduce costs. However, the thinner second circuit board 2 is prone to deformation during the plugging and unplugging process. Therefore, in order to improve the plugging and unplugging reliability of the thinner second circuit board 2, in some embodiments of the present application, the above-mentioned backplane 200 further includes Figure 13 a reinforcing rib 7 as shown. The reinforcing rib 7 can be provided on the third surface (i.e., the B surface of the second circuit board 2, which is also the bottom surface of the second circuit board 2) 204 of the second circuit board 2. And the reinforcing rib 7 is connected to the second circuit board 2. For example, the reinforcing rib 7 can be connected to the second circuit board 2 and the first connection beam 3 through fasteners. The reinforcing rib 7 can improve the strength of the second circuit board 2, thereby avoiding the problem of deformation of the second circuit board 2 caused by plugging and unplugging devices on the second circuit board 2. Among them, the reinforcing rib 7 can be provided only in the partial area of the second circuit board 2 where the pluggable devices are located, as Figure 14 shown.

[0066] The above is an example where the backplane 200 includes two circuit boards. If the backplane 200 adopts three circuit boards, that is, the backplane 200 further includes Figure 15The third circuit board 8 shown is disposed adjacent to the second circuit board 2. The connection structure between the third circuit board 8 and the second circuit board 2 can be the same as the connection structure between the first circuit board 1 and the second circuit board 2. It can be understood that if the backplane 200 employs more than three circuit boards, the connection structure between any two adjacent circuit boards can be the same as the connection structure between the first circuit board 1 and the second circuit board 2. Details are not elaborated herein.

[0067] In addition, to achieve the connection between the above-mentioned backplane 200 and the rack 100, the backplane 200 in the embodiment of the present application further includes a Figure 16 second connecting beam 9 as shown. The second connecting beam 9 can be disposed on the first surface 102 of the first circuit board 1. The second connecting beam 9 connects the first circuit board 1 to the rack 100. For example, the second connecting beam 9 can be connected to the first circuit board 1 through fasteners such as pins, screws, etc., and fixedly connected to the rack 100. Thus, the first circuit board 1 is fixed to the above-mentioned rack 100 through the second connecting beam 9.

[0068] Moreover, in some embodiments of the present application, the above-mentioned backplane 200 further includes a Figure 17 third connecting beam 10 as shown. The third connecting beam 10 can be disposed on the second surface 102 of the second circuit board 2. The third connecting beam 10 can connect the second circuit board 2 to the rack 100. The third connecting beam 10 can be connected to the second circuit board 2 through fixing members such as pins, screws, etc., and fixedly connected to the rack 100. Thus, the second circuit board 2 is fixed to the rack 100 through the third connecting beam 10.

[0069] Wherein, as Figure 18 shown, the length of the second connecting beam 9 can be the same as the width of the first circuit board 1 (the width direction is parallel to the Y-axis direction), and the length of the third connecting beam 10 can be the same as the width of the second circuit board 2 (the width direction is parallel to the Y-axis direction). The length of the second connecting beam 9 can also be less than the width of the first circuit board 1, and the length of the third connecting beam 9 can also be less than the width of the second circuit board 2. The present application places no restrictions thereon.

[0070] It should be noted that, as Figure 19 shown, if the third connecting beam 10 is disposed at a position on the second circuit board 2 opposite to the reinforcing rib 7, the reinforcing rib 7 can also be fixedly connected to the second connecting beam 10 through fasteners such as screws or threaded pins.

[0071] The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A circuit board assembly, characterized in that, Comprising: At least two circuit boards, said at least two circuit boards including a first circuit board and a second circuit board, a first connection groove is provided on a first side surface of the first circuit board, and a first connection protrusion is provided at a position on a second side surface of the second circuit board opposite to the first connection groove, and the first connection protrusion is spliced with the first connection groove; A first connection beam, the first connection beam is arranged on the same side surface of the first circuit board and the second circuit board, and is located at the splicing position of the first circuit board and the second circuit board; A positioning pin, the positioning pin connects the first circuit board, the second circuit board and the first connection beam.

2. The circuit board assembly according to claim 1, characterized in that, A second connection protrusion is further provided on the first side surface of the first circuit board, and a second connection groove is further provided at a position on the second side surface of the second circuit board opposite to the second connection protrusion, and the second connection groove is spliced with the second connection protrusion; the circuit board assembly includes a plurality of positioning pins, at least one of the positioning pins connects the splicing position of the second connection protrusion and the second connection groove and the first connection beam, and at least one of the positioning pins connects the splicing position of the first connection protrusion and the first connection groove and the first connection beam.

3. The circuit board assembly according to claim 2, characterized in that, A plurality of the first connection grooves and a plurality of the second connection protrusions are provided on the first side surface of the first circuit board, and the plurality of first connection grooves and the plurality of second connection protrusions are alternately distributed along the length direction of the first side surface; A plurality of the first connection protrusions and a plurality of the second connection grooves are provided on the second side surface of the second circuit board, and the plurality of first connection protrusions and the plurality of second connection grooves are alternately distributed along the length direction of the second side surface; and, the plurality of first connection grooves are respectively spliced with the plurality of first connection protrusions correspondingly, and the plurality of second connection protrusions are respectively spliced with the plurality of second connection grooves correspondingly; A part of the plurality of positioning pins respectively connects the splicing positions of the plurality of first connection grooves and the plurality of first connection protrusions with the first connection beam, and another part of the plurality of positioning pins respectively connects the splicing positions of the plurality of second connection protrusions and the plurality of second connection grooves with the first connection beam.

4. The circuit board assembly according to any one of claims 1 - 3, characterized in that, A part of the positioning pin is crimped in the first circuit board, a first positioning hole is formed on the first connection protrusion of the second circuit board, and the first positioning hole extends along the thickness direction of the second circuit board; a second positioning hole is formed at a position on the first connection beam opposite to the first positioning hole, and the second positioning hole extends along the thickness direction of the first connection beam; another part of the positioning pin is sequentially sleeved in the first positioning hole and the second positioning hole.

5. The circuit board assembly according to any one of claims 1 - 4, characterized in that, The positioning pin includes: A pin column, a locking protrusion is formed on the outer periphery of the pin column, the part of the pin column formed with the locking protrusion is crimped in the first circuit board, and the locking protrusion is locked with the crimping hole of the first circuit board; a locking threaded hole is provided at one end of the pin column located in the first circuit board; A pin cap, the pin cap is provided with an external thread, and the external thread of the pin cap is connected with the locking threaded hole of the pin column.

6. The circuit board assembly according to any one of claims 1 - 5, characterized in that, The circuit board assembly further includes: A first fastener that fixedly connects the first circuit board to the first connecting beam.

7. The circuit board assembly according to any one of claims 1 - 6, characterized in that, The circuit board assembly further includes: A second fastener that fixedly connects the second circuit board to the first connecting beam.

8. The circuit board assembly according to any one of claims 1 - 7, characterized in that, The circuit board assembly further includes: A reinforcing rib disposed on one side of the second circuit board and connected to the second circuit board.

9. The circuit board assembly according to any one of claims 1 - 8, characterized in that, The circuit board assembly further includes: A second connecting beam for connecting the first circuit board to the frame of the communication device.

10. The circuit board assembly according to any one of claims 1 - 9, characterized in that, The circuit board assembly further includes: A third connecting beam for connecting the second circuit board to the frame of the communication device.

11. A communication device, characterized in that, Including: A frame; The circuit board assembly according to any one of the above claims 1-10, wherein the circuit board assembly is disposed on the frame.

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