A connector for a multilayer wiring board

Abstract

The application relates to the field of connecting pieces, and discloses a connecting piece of a multilayer circuit board, which comprises a plurality of connecting columns, the connecting column comprises a first insulating shell and a supporting framework embedded in the first insulating shell, a reinforcing beam is arranged between two adjacent connecting columns, the axis of the reinforcing beam is perpendicular to the axis of the connecting column, the reinforcing beam comprises a second insulating shell and a processing framework embedded in the second insulating shell, the first insulating shell is connected with the second insulating shell, and the supporting framework and the reinforcing framework are metal pieces. The application sets the supporting framework to strengthen the structural strength of the connecting column. The reinforcing beam is arranged between the adjacent connecting columns, the stress structure of the adjacent connecting columns is improved, the two adjacent connecting columns are integrally stressed, the structural strength of the connecting piece is further strengthened, and the shape and position tolerances between the connecting columns are reduced. In summary, the assembly precision of the circuit board is improved by improving the structural strength of the connecting piece.

Description

Technical Field

[0001] This application relates to the field of connectors, and more particularly to a connector for multilayer circuit boards. Background Technology

[0002] When multiple circuit boards exist inside an electrical appliance, they need to be separated, insulated from each other, and kept at a certain distance for component connections. Multilayer circuit boards require at least two boards to be stacked during assembly, and the components on these stacked boards need to be precisely positioned to ensure the assembled board functions correctly. Current technology typically involves pre-drilling connection holes in the circuit boards, with connectors passing through these holes to connect the boards. Because the circuit boards carry current during operation, the connectors are usually made of plastic to provide insulation while connecting multiple circuit boards.

[0003] Regarding the above solution, the inventor believes that although the plastic pillars used for the connectors can provide insulation, the plastic pillars have low structural strength and are prone to tilting after being impacted by external forces. Furthermore, the dimensional and positional tolerances between the individual plastic pillars are relatively large. When assembling the circuit board, if a plastic pillar tilts, it will not only make the circuit board difficult to assemble, but also force assembly may damage the patches on the circuit board, thus damaging the circuit board. Summary of the Invention

[0004] To improve the assembly accuracy between multilayer circuit boards, this application provides a connector for multilayer circuit boards.

[0005] This application provides a connector for a multilayer circuit board, which adopts the following technical solution:

[0006] A connector for a multilayer circuit board includes multiple connecting posts. Each connecting post includes a supporting frame and a first insulating shell. The supporting frame is embedded in the first insulating shell. A reinforcing beam is provided between two adjacent connecting posts. The axis of the reinforcing beam is perpendicular to the axis of the connecting post. Each reinforcing beam includes a reinforcing frame and a second insulating shell. The reinforcing frame is embedded in the second insulating shell. The first insulating shell and the second insulating shell are connected. Both the supporting frame and the reinforcing frame are metal components.

[0007] By adopting the above technical solution, the first insulating shell can provide insulation, while the supporting frame can strengthen the structural strength of the connecting posts, preventing them from tilting under external forces and affecting the subsequent stacking of the circuit board. The reinforcing beams placed between adjacent connecting posts improve the stress structure of these posts, ensuring that the two adjacent connecting posts are stressed as a whole, further strengthening the structural strength of the connectors. This also reduces the dimensional and positional tolerances between the connecting posts, preventing tilting of an individual connecting post from affecting the assembly of other connecting posts and potentially damaging the circuit board due to forced stacking.

[0008] In summary, this approach not only improves the structural strength of the connectors but also reduces the dimensional and positional tolerances between the connecting posts, thereby enhancing the assembly accuracy between multilayer circuit boards.

[0009] Optionally, the first connecting end of the connecting post has a connecting boss protruding outward, and the second connecting end of the connecting post has a connecting groove, which is adapted to the connecting boss. The connecting boss is used to pass into the connecting groove of an adjacent connecting member when multiple connecting members are connected.

[0010] By adopting the above technical solution, when three or more layers of circuit boards need to be stacked, the connecting boss can be inserted into the connecting slot of the adjacent connector after passing through the connecting hole of the circuit board, so as to realize the connection between the connectors.

[0011] Optionally, the support frame extends into the connecting boss, and one end of the support frame located in the connecting boss has a heat dissipation thread.

[0012] By adopting the above technical solution, the heat dissipation thread can increase the contact area between the support frame and the first insulating shell, thereby improving the heat dissipation performance of the support frame at the connecting boss. When the circuit board is used inside an electrical appliance, and the appliance generates heat during operation, the heat dissipation area of ​​the support frame at the connecting boss is larger, resulting in a greater degree of thermal expansion of the first insulating shell at the connecting boss than that of the connecting post body, thus improving the stability of the connection between circuit boards.

[0013] Optionally, three connecting columns are provided, the axes of the three connecting columns are parallel, the axes of the three connecting columns are not in the same plane, and a reinforcing beam is provided between two adjacent connecting columns.

[0014] By adopting the above technical solution, three reinforcing beams and three connecting columns can form a stable triangular structure, further enhancing the structural strength of the connectors.

[0015] Optionally, the connecting boss is a cylinder, and a first annular platform is provided on the side wall of the connecting boss in the circumferential direction. The inner wall of the connecting groove is provided with a snap-fit ​​ring groove that matches the first annular platform. The first annular platform is an elastic element.

[0016] By adopting the above technical solution, two adjacent connecting parts can be axially connected and disassembled through the cooperation of the first ring platform and the snap ring groove.

[0017] Optionally, it also includes a first fixing cap and a second fixing cap, wherein the first fixing cap has a fixing groove adapted to the connecting boss, and the second fixing cap has a fixing boss protruding outward to adapt to the connecting groove.

[0018] By adopting the above technical solution, the first fixing cap can be connected to the first connecting end of the connector of the second-to-top circuit board after the connector of the second-to-top circuit board passes through the connecting hole of the top circuit board, and the second fixing cap can be connected to the second connecting end of the connector of the bottom circuit board.

[0019] Optionally, both the first insulating shell and the second insulating shell have heat dissipation windows on their side walls.

[0020] By adopting the above technical solutions, the heat dissipation window can improve the heat dissipation of the supporting frame and the reinforced frame.

[0021] Optionally, both the first insulating shell and the second insulating shell are made of plastic or nylon.

[0022] By adopting the above technical solutions, plastic and nylon parts have good electrical insulation properties.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By embedding the support frame in the first insulating shell, the first insulating shell can play an insulating role, while the support frame can strengthen the structural strength of the connecting column and prevent the connecting column from tilting when subjected to external force, which would affect the subsequent stacking of the circuit board.

[0025] 2. By setting reinforcing beams between adjacent connecting columns, the stress structure of the adjacent connecting columns can be improved, so that the two adjacent connecting columns are subjected to the same stress, which further strengthens the structural strength of the connector.

[0026] 3. By setting a first fixing cap and a second fixing cap, the first fixing cap can be connected to the first connecting end of the connector of the second-top circuit board after the connector of the second-top circuit board passes through the connecting hole of the top circuit board, and the second fixing cap can be connected to the second connecting end of the connector of the bottom circuit board. Attached Figure Description

[0027] Figure 1 A schematic diagram of the structure of a connector for a multilayer circuit board. Figure 1 .

[0028] Figure 2 A schematic diagram of the structure of a connector for a multilayer circuit board. Figure 2 .

[0029] Figure 3 A schematic diagram of the structure of a connector for a multilayer circuit board. Figure 3 .

[0030] Figure 4 This is a schematic diagram of the structure of the first fixing cap.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Connecting post; 11. Support frame; 12. First insulating shell; 13. First connecting end; 131. Connecting boss; 1311. First ring platform; 1312. First external thread; 14. Second connecting end; 141. Connecting groove; 1411. Snap-fit ​​ring groove; 1412. Second internal thread; 2. Reinforcing beam; 21. Reinforcing frame; 22. Second insulating shell; 3. First fixing cap; 31. Fixing groove; 311. First internal thread; 4. Second fixing cap; 41. Fixing boss; 42. Second external thread; 5. Heat dissipation thread; 6. Heat dissipation window. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the application and are not intended to limit the scope of the application.

[0034] This application discloses a connector for a multilayer circuit board. (Refer to...) Figure 1 A connector for a multilayer circuit board includes multiple connecting posts 1, with a reinforcing beam 2 positioned between two adjacent connecting posts 1. The connecting posts 1 support the stacked circuit boards, and the reinforcing beam 2 enhances the structural strength of the connector.

[0035] Reference Figure 1The connecting column 1 includes a supporting frame 11 and a first insulating shell 12, with the supporting frame 11 embedded in the first insulating shell 12. Specifically, the supporting frame 11 is a metal part. During the production of the connecting column 1, the supporting frame 11 can be fabricated first and then positioned in the mold of the first insulating shell 12. The axis of the reinforcing beam 2 is perpendicular to the axis of the connecting column 1. The reinforcing beam 2 includes a reinforcing frame 21 and a second insulating shell 22, with the reinforcing frame 21 embedded in the second insulating shell 22. The first insulating shell 12 and the second insulating shell 22 are connected, and the reinforcing frame 21 is a metal part. In different embodiments, the reinforcing beam 2 and the connecting column 1 can be connected in different ways, as long as the reinforcing beam 2 can be fixed between the two connecting columns 1. The reinforcing beam 2 and the connecting column 1 can be manufactured separately. The finished reinforcing beam 2 and the finished connecting column 1 can be connected by hot-melt connection. Alternatively, the supporting frame 11 and the reinforcing frame 21 can be welded together first, and then the welded frame can be placed in the insulating shell mold to produce the first insulating shell 12 and the second insulating shell 22. In different embodiments, the first insulating shell 12 can be made of different materials, and the second insulating shell 22 can also be made of different materials, as long as they have sufficient insulation. The first insulating shell 12 and the second insulating shell 22 can be made of plastic, nylon, or resin. Specifically, in order to reduce the internal stress of the connector, when selecting the metal materials for manufacturing the supporting frame 11 and the reinforcing frame 21, metal materials with a thermal expansion coefficient that is close to the thermal expansion coefficient of the insulating materials for manufacturing the first insulating shell 12 and the second insulating shell 22 can be selected, such as aluminum, aluminum alloy, or copper. Alternatively, a layer of rubber or polyurethane elastic buffer layer can be coated on the support frame 11 and the reinforcing frame 21 to reduce the shrinkage difference between the frame and the insulation shell.

[0036] Reference Figure 2 and Figure 3 Furthermore, in different embodiments, the number of connecting posts 1 can be varied, depending on the shape of the circuit board and the arrangement of the connecting holes. Two connecting posts 1 can be used, with their axes parallel and a reinforcing beam 2 positioned between them. The reinforcing beam 2 and the two connecting posts 1 are joined to form an H-shaped or U-shaped connector. Three connecting posts 1 can be used, with their axes parallel but not on the same plane. A reinforcing beam 2 is positioned between two adjacent connecting posts 1. The three reinforcing beams 2 and the three connecting posts 1 can construct a stable triangular structure, further strengthening the structural strength of the connector. Specifically, a right-angled triangular structure can be constructed. The circuit board is typically a cuboid. Connectors with two connecting posts 1 can be positioned along the edge of the circuit board, while connectors with three connecting posts 1 can be positioned at the four corners of the circuit board.

[0037] Reference Figure 2 and Figure 3When three or more layers of circuit boards need to be stacked, adjacent connectors can have different connection methods. As an example, the first connecting end 13 of the connecting post 1 protrudes outward to form a connecting boss 131, and the second connecting end 14 of the connecting post 1 has a connecting groove 141. The connecting groove 141 is adapted to the connecting boss 131. The connecting boss 131 is used to pass into the connecting groove 141 of the adjacent connector when multiple connectors are connected, so as to realize the connection between the connectors. Specifically, the connecting boss 131 is cylindrical. Furthermore, the connection between the connecting boss 131 and the connecting groove 141 can have different structures. As an example, the side wall of the connecting boss 131 protrudes outward along the circumference of the connecting boss 131 with a first annular platform 1311, and the groove wall of the connecting groove 141 has a snap-fit ​​ring groove 1411 adapted to the first annular platform 1311, and the first annular platform 1311 is an elastic element. Adjacent connectors are connected and disassembled through the engagement of the first annular platform 1311 and the snap-fit ​​ring groove 1411. For connectors between the second-to-top layer and the top layer of a three-layer or higher multilayer circuit board, the connecting boss 131 and the connecting groove 141 can have a different structure. The side wall of the connecting boss 131 is provided with a first external thread 1312, and the connecting groove 141 still has a snap-fit ​​ring groove 1411. For connectors between the bottom layer and the second-to-bottom layer of a three-layer or higher circuit board, the connecting boss 131 and the connecting groove 141 can have a different structure. The connecting boss 131 still has a first annular platform 1311, and the inner wall of the connecting groove 141 is provided with a second internal thread 1412 (not shown in the figure).

[0038] Reference Figure 3 and Figure 4 When only two circuit boards need to be stacked, the connecting boss 131 and the connecting groove 141 can also have another structure. The side wall of the connecting boss 131 is provided with a first external thread 1312, and the inner wall of the connecting groove 141 is provided with a second internal thread 1412. Further, the connector also includes a first fixing cap 3 and a second fixing cap 4. The first fixing cap 3 has a fixing groove 31 that matches the connecting boss 131, and the fixing groove 31 has a first internal thread 311 that matches the first external thread 1312. The second fixing cap 4 has a fixing boss 41 that matches the connecting groove 141, and the side wall of the fixing boss 41 has a second external thread 42 that matches the second internal thread 1412. The first fixing cap 3 is connected to the connecting boss 131 via a threaded engagement, and the second fixing cap 4 is connected to the connecting groove 141 via a threaded engagement. The first fixing cap 3 can be inserted into the top circuit board through the connection hole of the second-top circuit board and connected to the first connection end 13 of the connector of the second-top circuit board. The second fixing cap 4 can be connected to the second connection end 14 of the connector of the bottom circuit board.

[0039] Furthermore, the support frame 11 extends into the connecting boss 131, and a heat dissipation thread 5 is provided at one end of the support frame 11 located in the connecting boss 131. The heat dissipation thread 5 can increase the contact area between the support frame 11 and the first insulating shell 12, thereby improving the heat dissipation performance of the support frame 11 at the connecting boss 131. When the circuit board is used inside an electrical appliance, and the appliance generates heat during operation, because the heat dissipation area of ​​the support frame 11 at the connecting boss 131 is larger, the degree of thermal expansion of the first insulating shell 12 at the connecting boss 131 is greater than that of the main body of the connecting post 1, thus improving the stability of the connection between the circuit boards. In order to improve the heat dissipation of the support frame 11 and the reinforcing frame 21, heat dissipation windows 6 are provided on the side walls of both the first insulating shell 12 and the second insulating shell 22. In different embodiments, the heat dissipation windows 6 can be of different shapes; as an example, the heat dissipation window 6 is circular.

[0040] The implementation principle of this application embodiment is as follows: the first insulating shell 12 provides insulation, while the supporting frame 11 strengthens the structural strength of the connecting post 1, preventing it from tilting under external force and affecting subsequent stacking of the circuit board. The reinforcing beam 2 between adjacent connecting posts 1 improves the stress structure of adjacent connecting posts 1, ensuring that the two adjacent connecting posts 1 are stressed as a whole, further strengthening the structural strength of the connector. It also reduces the dimensional and positional tolerances between the connecting posts 1, preventing tilting of an individual connecting post 1 from affecting the assembly of other connecting posts 1 and potentially damaging the circuit board due to forced stacking. In summary, this improves the structural strength of the connector, reduces the dimensional and positional tolerances between the connecting posts 1, and enhances the assembly accuracy between multilayer circuit boards.

[0041] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A connector for a multilayer circuit board, characterized in that, It includes multiple connecting columns (1), each connecting column (1) including a supporting frame (11) and a first insulating shell (12). The supporting frame (11) is embedded in the first insulating shell (12). A reinforcing beam (2) is provided between two adjacent connecting columns (1). The axis of the reinforcing beam (2) is perpendicular to the axis of the connecting column (1). The reinforcing beam (2) includes a reinforcing frame (21) and a second insulating shell (22). The reinforcing frame (21) is embedded in the second insulating shell (22). The first insulating shell (12) and the second insulating shell (22) are connected. Both the supporting frame (11) and the reinforcing frame (21) are metal parts.

2. The connector for a multilayer circuit board according to claim 1, characterized in that, The first connecting end (13) of the connecting post (1) protrudes outward to form a connecting boss (131), and the second connecting end (14) of the connecting post (1) is provided with a connecting groove (141). The connecting groove (141) is adapted to the connecting boss (131), and the connecting boss (131) is used to pass into the connecting groove (141) of the adjacent connecting member when multiple connecting members are connected.

3. The connector for a multilayer circuit board according to claim 2, characterized in that, The support frame (11) extends into the connecting boss (131), and the end of the support frame (11) located in the connecting boss (131) is provided with a heat dissipation thread (5).

4. The connector for a multilayer circuit board according to claim 1, characterized in that, There are three connecting columns (1), the axes of the three connecting columns (1) are parallel, the axes of the three connecting columns (1) are not in the same plane, and a reinforcing beam (2) is provided between two adjacent connecting columns (1).

5. The connector for a multilayer circuit board according to claim 2, characterized in that, The connecting boss (131) is a cylinder. The side wall of the connecting boss (131) is provided with a first ring platform (1311) protruding outward along the circumference of the connecting boss (131). The inner wall of the connecting groove (141) is provided with a snap-fit ​​ring groove (1411) that is adapted to the first ring platform (1311). The first ring platform (1311) is an elastic element.

6. The connector for a multilayer circuit board according to claim 3, characterized in that, It also includes a first fixing cap (3) and a second fixing cap (4). The first fixing cap (3) has a fixing groove (31) that is adapted to the connecting boss (131), and the second fixing cap (4) has a fixing boss (41) that is adapted to the connecting groove (141).

7. The connector for a multilayer circuit board according to claim 1, characterized in that, Both the first insulating shell (12) and the second insulating shell (22) have heat dissipation windows (6) on their side walls.

8. The connector for a multilayer circuit board according to claim 1, characterized in that, Both the first insulating shell (12) and the second insulating shell (22) are plastic parts.

9. The connector for a multilayer circuit board according to claim 8, characterized in that, Both the first insulating shell (12) and the second insulating shell (22) are made of nylon.

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