Circuit arrangement and electrically conductive connection method

Abstract

The invention relates to a circuit arrangement and an electrically conductive connection method. A circuit device includes: a first circuit board including a through hole and a first bonding portion provided at an outer periphery of the through hole; a second circuit board including a second bonding portion; and a connector made of a conductive material and disposed between the first circuit board and the second circuit board, the connector including a first connecting portion and a second connecting portion, where the first connecting portion includes a convex portion, the first engaging portion includes a concave portion, and the convex portion of the first connecting portion is configured to mate with the concave portion of the first engaging portion for conductive connection, the second connection part and the second joint part are connected in an electrically conductive manner.

Description

Technical Field

[0001] The present invention relates to the field of circuits, and more particularly to circuit devices and conductive connection methods. Background Art

[0002] In a circuit device such as an electronic control unit, a plurality of stacked circuit boards are usually provided due to size limitations, and copper connectors are usually used to conduct electrical connections between the circuit boards so as to transfer current. Figure 1 FIG. 1 is an exploded schematic diagram of a circuit device according to an embodiment. Figure 1 As shown, the stacked upper circuit board 1 and the lower circuit board 2 are conductively connected through the copper connector 3. Specifically, the upper circuit board 1 includes a through hole and a conductive ring located at the periphery of the through hole, and the lower circuit board 2 includes a through hole and a conductive ring located at the periphery of the through hole. First, the annular copper connector 3 is welded to the conductive ring of the lower circuit board 2. Then, the annular plastic insulating member 4 is set in the through hole of the upper circuit board 1. After that, the bolt 5 is passed through the plastic insulating member 4, the through holes of the upper circuit board 1 and the lower circuit board 2, and the bolt 5 is connected to the housing (not shown). The plastic insulating member 4 is used to insulate the bolt 5 relative to the upper circuit board 1, the lower circuit board 2 and the copper connector 3. After the installation is completed through the bolt 5, the copper connector 3 is completely conductively contacted with the conductive ring of the upper circuit board 1, so that current transmission between the upper circuit board 1 and the lower circuit board 2 can be achieved.

[0003] However, during the manufacture and use of the circuit device, the bolts may become loose due to certain circumstances (such as vibration, etc.). This will lead to poor contact between the copper connector and the conductive ring of the circuit board, causing increased resistance and severe heat generation, which may eventually lead to failure. In addition, in mass production, the copper connector will be covered with an insulating film before welding, and the insulating film should be removed after welding with the underlying circuit board. However, if the insulating film is not removed well, the remaining insulating film will overheat or even burn during the use of the circuit device, which will also cause the circuit device to malfunction.

[0004] Therefore, a circuit device and a conductive connection method that can reduce the risk of failure are needed. Summary of the invention

[0005] One object of the present invention is to provide a circuit device and a conductive connection method that can reduce the risk of failure. Another object of the present invention is to provide a circuit device and a conductive connection method that can improve the current passing capacity. Another object of the present invention is to provide a circuit device and a conductive connection method that can simplify the structure. Another object of the present invention is to provide a circuit device and a conductive connection method that can reduce the cost.

[0006] One aspect of the present invention provides a circuit device, comprising: a first circuit board, comprising a through hole and a first joining portion arranged on the outer periphery of the through hole; a second circuit board, comprising a second joining portion; and a connector, which is made of a conductive material and is arranged between the first circuit board and the second circuit board, the connector comprising a first connecting portion and a second connecting portion, wherein the first connecting portion comprises a convex portion, the first joining portion comprises a concave portion, and the convex portion of the first connecting portion is configured to cooperate with the concave portion of the first joining portion to be conductively connected, and wherein the second connecting portion and the second joining portion are conductively connected.

[0007] According to an embodiment of the present invention, the first connecting portion includes a plurality of protrusions, the first joining portion includes a plurality of recesses, the number of the plurality of protrusions is the same as the number of the plurality of recesses, and wherein the plurality of protrusions of the first connecting portion are configured to be able to be respectively engaged with the plurality of recesses of the first joining portion.

[0008] According to an embodiment of the present invention, the first engaging portion is configured such that when the plurality of protrusions of the first connecting portion are fitted into the plurality of recesses of the first engaging portion, the plurality of protrusions of the first connecting portion can be exposed from an axial end surface of the first engaging portion away from the second circuit board.

[0009] According to an embodiment of the present invention, the plurality of convex portions of the first connection portion and the plurality of concave portions of the first engagement portion are respectively connected by brazing.

[0010] According to an embodiment of the present invention, an axial end face of the second connecting portion of the connector and an axial end face of the second engaging portion of the second circuit board close to the first circuit board are engaged with each other and connected by soldering.

[0011] According to an embodiment of the present invention, the connector has a substantially annular structure.

[0012] According to an embodiment of the present invention, the plurality of protrusions of the first connecting portion have the same shape and are evenly distributed around the central axis of the connector.

[0013] According to an embodiment of the invention, the connector is made of copper.

[0014] Another aspect of the present invention provides a conductive connection method for a circuit device according to an embodiment of the present invention, comprising: embedding a convex portion of a first connecting portion of a connector of the circuit device into a concave portion of a first joining portion of a first circuit board; and connecting the convex portion of the first connecting portion with the concave portion of the first joining portion by soldering.

[0015] According to an embodiment of the present invention, the conductive connection method further includes: before the convex portion of the first connection portion of the connector is engaged with the concave portion of the first joint portion of the first circuit board, connecting the second connection portion of the connector with the second joint portion of the second circuit board of the circuit device by soldering.

[0016] According to an embodiment of the present invention, a conductive connection between the connector and the first circuit board can be achieved by matching the shape of the convex portion of the connector and the concave portion of the first circuit board, and soldering can be used to connect the convex portion of the connector and the concave portion of the first circuit board. Thus, compared with the existing design, it is not necessary to use bolts and insulating parts, which can reduce the risk of failure due to loose bolts, simplify the structure and reduce costs. In addition, through the conductive contact between the multiple convex portions of the connector and the multiple concave portions of the first circuit board, the contact area can be increased, thereby improving the current passing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an exploded schematic diagram of a circuit device according to one embodiment.

[0018] Figure 2 is an exploded schematic diagram of a circuit device according to an embodiment of the present invention.

[0019] Figure 3 is a schematic diagram of a connector according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] Hereinafter, embodiments of the present invention are described with reference to the accompanying drawings. The following detailed description and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, and the present invention is not limited to the preferred embodiments described. The scope of the present invention is defined by the claims. The present invention is now described in detail with reference to exemplary embodiments, and some embodiments are illustrated in the accompanying drawings. The following description is made with reference to the accompanying drawings, and unless otherwise indicated, the same reference numerals in different drawings represent the same or similar elements. The schemes described in the following exemplary embodiments do not represent all schemes of the present invention. On the contrary, these schemes are merely examples of systems and methods of various aspects of the present invention involved in the appended claims.

[0021] To solve the above technical problems, the present invention provides a circuit device and a conductive connection method for a circuit board. Below, exemplary embodiments of the present invention are described with reference to the accompanying drawings. It should be understood that only certain embodiments of the present invention are shown in the accompanying drawings, and the scope of the present invention should be determined according to the claims. Exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0022] Figure 2 is an exploded schematic diagram of a circuit device according to an embodiment of the present invention. Figure 3 Schematic diagram of a connector according to an embodiment of the present invention. Figure 2 As shown, the circuit device includes a first circuit board 10, a second circuit board 20 and a connector 30. In an exemplary embodiment, the first circuit board 10 is an upper circuit board, and the second circuit board 20 is a lower circuit board.

[0023] The first circuit board 10 includes a through hole 11 and a first engaging portion 12 disposed at the periphery of the through hole 11. The first engaging portion 12 is at least partially formed of a conductive material. In an exemplary embodiment, the first engaging portion 12 has a substantially annular structure.

[0024] The second circuit board 20 includes a through hole 21 and a second engaging portion 22 disposed at the periphery of the through hole 21. The second engaging portion 22 is at least partially formed of a conductive material. In an exemplary embodiment, the second engaging portion 22 has a substantially annular structure.

[0025] In the circuit device, the first circuit board 10 and the second circuit board 20 are stacked on each other. The connector 30 is used to be arranged between the first circuit board 10 and the second circuit board 20 to achieve conductive connection between the first circuit board 10 and the second circuit board 20. The structure of the connector 30 will be described in detail with reference to the accompanying drawings.

[0026] The connector 30 is made of a conductive material, preferably copper. Preferably, the connector 30 has a generally annular structure and has a central axis. Figure 3 As shown, the connector 30 includes a first connection portion 31 and a second connection portion 32. The first connection portion 31 is used to be electrically connected to the first joint portion 12 of the first circuit board 10, and the second connection portion 32 is used to be electrically connected to the second joint portion 22 of the second circuit board 20.

[0027] According to the embodiment of the present invention, the first connecting portion 31 of the connector 30 and the first engaging portion 12 of the first circuit board 10 are configured to be connected in a form-fitting manner.

[0028] The first connection part 31 includes a convex part 33. Preferably, the first connection part 31 includes a plurality of convex parts 33. Thus, the first connection part 31 has a claw-like structure. In an exemplary embodiment, the plurality of convex parts 33 of the first connection part 31 have the same shape. Preferably, the plurality of convex parts 33 are evenly distributed around the central axis of the connector 30.

[0029] Accordingly, the first engaging portion 12 of the first circuit board 10 includes a recess 13. The recess 13 has a shape that matches the protrusion 33. Preferably, the first engaging portion 12 includes a plurality of recesses 13. The number of the plurality of recesses 13 of the first engaging portion 12 is the same as the number of the plurality of protrusions 33 of the first connecting portion 31. In an exemplary embodiment, the plurality of recesses 13 of the first engaging portion 12 have the same shape. Preferably, the plurality of recesses 13 are evenly distributed around the central axis of the through hole 12.

[0030] The plurality of protrusions 33 of the first connection portion 31 of the connector 30 can be respectively fitted into the plurality of recesses 13 of the first engaging portion 12 of the first circuit board 10, so that the first connection portion 31 of the connector 30 and the first engaging portion 12 of the first circuit board 10 can be conductively connected in a form-fitting manner. In some embodiments, the surface of the recess 13 for engaging with the protrusion 33 includes a conductive material. The contact between the protrusion 33 and the recess 13 forms a conductive connection between the protrusion 33 and the recess 13.

[0031] In an exemplary embodiment, the plurality of protrusions 33 of the first connection portion 31 and the plurality of recesses 13 of the first engagement portion 12 may be connected by soldering, preferably reflow soldering, after being fitted with each other.

[0032] The first engaging portion 12 of the first circuit board 10 includes an axial end face away from the second circuit board 20 and an axial end face close to the second circuit board 20. In an exemplary embodiment, when the plurality of protrusions 33 of the first connecting portion 31 are engaged in the plurality of recesses 13 of the first engaging portion 12, the protrusions 33 of the first connecting portion 31 can be exposed from the axial end face of the first engaging portion 12 away from the second circuit board 20. This facilitates soldering of the protrusions 33 and the recesses 13. Preferably, when the plurality of protrusions 33 of the first connecting portion 31 are engaged in the plurality of recesses 13 of the first engaging portion 12, the protrusions 33 are exposed from the axial end face of the first engaging portion 12 away from the second circuit board 20 and are flush with the axial end face.

[0033] In some embodiments, the axial end surface of the second connection portion 32 of the connector 30 and the axial end surface of the second engaging portion 22 of the second circuit board 10 close to the first circuit board 10 are engaged with each other and connected by soldering. In other embodiments, the second connection portion 32 of the connector 30 and the second engaging portion 22 of the second circuit board 10 can also be electrically connected by other means.

[0034] Through the shape matching of the convex part of the connector and the concave part of the first circuit board, the conductive connection between the connector and the first circuit board can be achieved, and soldering can be used to connect the convex part of the connector and the concave part of the first circuit board. Therefore, compared with the existing design, it is not necessary to use bolts and insulating parts, which can reduce the risk of failure due to loose bolts, simplify the structure and reduce costs. In addition, through the conductive contact between the multiple convex parts of the connector and the multiple concave parts of the first circuit board, the contact area can be increased, thereby improving the current passing capacity.

[0035] The circuit device according to the above exemplary embodiment of the present invention can be connected by using the conductive connection method according to some embodiments of the present invention. The conductive connection method according to the embodiment of the present invention will be described in detail below.

[0036] In an exemplary embodiment, the conductive connection method includes the following steps: connecting the second connecting portion 32 of the connector 30 to the second joining portion 22 of the second circuit board 20 by soldering; embedding the protrusion 33 of the first connecting portion 31 of the connector 30 into the recess 13 of the first joining portion 12 of the first circuit board 10; and connecting the protrusion 33 of the first connecting portion 31 to the recess 13 of the first joining portion 12 by soldering.

[0037] Other embodiments of the circuit device can be correspondingly applied to the conductive connection method according to the present invention. Please refer to the above description for details and will not be described in detail here.

[0038] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present invention is not limited to the configuration and method of the above-described embodiments. On the contrary, the present invention is intended to cover various modifications and equivalent configurations. In addition, although the various elements and method steps of the disclosed invention are shown in various exemplary combinations and configurations, other combinations including more or less elements or methods also fall within the scope of the present invention.

[0039] Reference numerals list

[0040] 1 Upper circuit board;

[0041] 2 Lower circuit board;

[0042] 3 copper connectors;

[0043] 4 Plastic insulation;

[0044] 5 bolts;

[0045] 10 first circuit board;

[0046] 11 through hole;

[0047] 12 a first joint portion;

[0048] 13 concavity;

[0049] 20 second circuit board;

[0050] 21 through hole;

[0051] 22 second joint portion;

[0052] 30 connectors;

[0053] 31 first connecting portion;

[0054] 32 second connecting portion;

[0055] 33 bulge.

Claims

1. A circuit device, comprising: A first circuit board (10) comprises a through hole (11) and a first joint portion (12) arranged on the periphery of the through hole (11); A second circuit board (20) including a second joint portion (22); and A connector (30) made of a conductive material and arranged between the first circuit board (10) and the second circuit board (20), the connector (30) comprising a first connecting portion (31) and a second connecting portion (32), The first connecting portion (31) includes a convex portion (33), the first engaging portion (12) includes a concave portion (13), and the convex portion (33) of the first connecting portion (31) is configured to cooperate with the concave portion (13) of the first engaging portion (12) to achieve conductive connection, and Wherein, the second connecting portion (32) and the second joining portion (22) are electrically connected.

2. The circuit arrangement according to claim 1, wherein: The first connecting portion (31) includes a plurality of convex portions (33), the first engaging portion (12) includes a plurality of concave portions (13), the number of the plurality of convex portions (33) is the same as the number of the plurality of concave portions (13), and The plurality of protrusions (33) of the first connection portion (31) are configured to be respectively fitted into the plurality of recesses (13) of the first engagement portion (12).

3. The circuit arrangement according to claim 2, wherein: The first joining portion (12) is configured such that when the multiple protrusions (33) of the first connecting portion (31) are engaged with the multiple recesses (13) of the first joining portion (12), the multiple protrusions (33) of the first connecting portion (31) can be exposed from the axial end surface of the first joining portion (12) away from the second circuit board (20).

4. The circuit arrangement according to claim 2 or 3, wherein: The plurality of convex portions (33) of the first connection portion (31) and the plurality of concave portions (13) of the first engagement portion (12) are respectively connected by brazing.

5. The circuit arrangement according to claim 4, wherein: The axial end surface of the second connecting portion (32) of the connector (30) and the axial end surface of the second engaging portion (22) of the second circuit board (20) close to the first circuit board (10) are engaged with each other and connected by soldering.

6. The circuit arrangement according to any one of claims 1 to 3, wherein: The connector (30) has a generally annular structure.

7. The circuit arrangement according to claim 6, wherein: The plurality of protrusions (33) of the first connecting portion (31) have the same shape and are evenly distributed around the central axis of the connector (30).

8. The circuit arrangement according to claim 7, wherein: The connector (30) is made of copper.

9. A conductive connection method for a circuit device according to any one of claims 1 to 8, comprising: The convex portion (33) of the first connecting portion (31) of the connector (30) of the circuit device is fitted into the concave portion (13) of the first engaging portion (12) of the first circuit board (10); and The convex portion (33) of the first connecting portion (31) and the concave portion (13) of the first engaging portion (12) are connected by brazing.

10. The conductive connection method according to claim 9, further comprising: Before the protrusion (33) of the first connection portion (31) of the connector (30) is engaged with the recess (13) of the first joint portion (12) of the first circuit board (10), the second connection portion (32) of the connector (30) is connected to the second joint portion (22) of the second circuit board (20) of the circuit device by soldering.

Images