Circuit board assembly and electronic device

Abstract

This utility model discloses a circuit board assembly and an electronic device. The circuit board assembly includes a main body and a fractured part, which are connected. A fracture guiding structure is formed between the main body and the fractured part. A busbar has a screw hole aligned with the center of the fractured part. One end of a screw connector is screwed into the screw hole. When the screw connector is in a preset first position, one end of the screw connector passes through a wire terminal and is screwed into the screw hole, while the other end of the screw connector is located on the side of the busbar away from the circuit board body. When the screw connector is in a preset second position, the fractured part separates from the main body and forms an opening. One end of the screw connector passes through the opening, and the other end of the screw connector presses the wire terminal onto the surface of the busbar away from the circuit board body. This method reduces the probability of loose screw connectors. Simultaneously, the separation of the fractured part alerts workers that the size of the screw connector does not meet production requirements, allowing for timely replacement with a suitable screw connector.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, and in particular to a circuit board assembly and an electronic device. Background Technology

[0002] Currently, screw terminals are widely used in power switches due to their simple structure and low cost. Especially in applications with high current carrying capacity, screw-connected terminals can meet the transmission requirements of high current by increasing the contact area and mechanical pressure.

[0003] When connecting screw terminals to wire O-type terminals, tightening the screw is an essential step. When the screw length is mismatched (e.g., the screw is too long), the tail of the screw contacts the circuit board prematurely during tightening. The circuit board obstructs the screw tail, preventing further tightening. This results in the screw head not properly pressing the wire O-type terminal against the busbar, causing a "half-tight" screw. A half-tight screw increases contact resistance, potentially leading to unstable power output, localized overheating, or even power supply melting and burnout. Currently, to avoid this "half-tight" screwing, a hole is typically drilled in the circuit board corresponding to the screw tail to prevent obstruction and ensure the screw head properly presses the wire O-type terminal against the busbar. However, before connecting the screw terminals to the wire O-type terminals, the screw terminals need to be wave soldered to the circuit board. Wave solder can easily seep into the openings and solidify upon cooling, causing the openings to become clogged. When the screw terminals are subsequently connected to the wire O-type terminals, the clogged openings can obstruct the tail of the screw, increasing the probability of the screw being loosely tightened. At the same time, since the path of the solder flowing through the openings is difficult to predict, the solder may flow to other adjacent pins, causing short circuits and other problems. Utility Model Content

[0004] The present invention aims to provide a circuit board assembly and electronic device that can reduce the probability of loose screws.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this utility model embodiment is: providing a circuit board assembly, including a circuit board body, a busbar, and a screw connector; the circuit board body includes a body portion and a fracture portion, the body portion being connected to the fracture portion, and a fracture guiding structure being formed between the body portion and the fracture portion, the fracture guiding structure being used to guide the fracture portion to break apart from the body portion; the busbar is connected to the body portion, the busbar having a screw hole, the screw hole being located above the fracture portion along the height direction of the busbar, and the screw hole being aligned with the center of the fracture portion; one end of the screw connector is screwed into the screw hole, and one end of the screw connector is movable along the depth direction of the screw hole. The screw connector is positioned such that one end of the screw connector is located on the side of the busbar facing away from the circuit board body, and the screw connector is used to lock the wire terminal to the busbar. When the screw connector is in a preset first position relative to the busbar, one end of the screw connector passes through the wire terminal and is screwed into the screw hole, while the other end of the screw connector is located on the side of the busbar facing away from the circuit board body. When the screw connector moves to a preset second position relative to the busbar, the broken portion separates from the main body and forms an opening. One end of the screw connector passes through the opening, and the other end of the screw connector presses the wire terminal to the surface of the busbar facing away from the circuit board body.

[0006] Optionally, the circuit board body has a plurality of through holes and a plurality of connecting portions between the body portion and the fracture portion. The plurality of through holes are evenly spaced in a ring, and a connecting portion is provided between any two of the through holes. The plurality of through holes and the plurality of connecting portions constitute the fracture guiding structure.

[0007] Optionally, the extension length of the connecting portion along the circumferential direction is less than the extension length of the through hole along the circumferential direction.

[0008] Optionally, the thickness of the connecting portion is less than the thickness of the body portion or the thickness of the fracture portion.

[0009] Optionally, the busbar is provided with a U-shaped groove, the screw hole is connected to the bottom of the U-shaped groove, and the circuit board body closes the opening of the U-shaped groove; when the screw connector is in a preset first position relative to the busbar, one end of the screw connector passes through the wire terminal and extends from the screw hole into the U-shaped groove, and the other end of the screw connector is located on the side of the busbar away from the circuit board body; when the screw connector moves to a preset second position relative to the busbar, one end of the screw connector passes through the opening of the U-shaped groove into the opening, and the other end of the screw connector presses the wire terminal onto the surface of the busbar away from the circuit board body.

[0010] Optionally, the busbar has a positioning part around the opening of the U-shaped groove, and the circuit board body has a positioning hole in the body part, with the positioning part inserted into the positioning hole.

[0011] Optionally, the circuit board assembly further includes a soldering component disposed on the body portion, the soldering component being at least partially located between the positioning portion and the positioning hole, the soldering component fixing the positioning portion to the positioning hole.

[0012] Optionally, the circuit board body has a soldering hole in the body portion, and the soldering component is at least partially located in the soldering hole.

[0013] Optionally, there are multiple welding holes, which are evenly spaced along the periphery of the positioning hole, and the welded part is at least partially located within the multiple welding holes.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in this utility model embodiment is to provide an electronic device, including the above-mentioned circuit board assembly.

[0015] The beneficial effects of this utility model embodiment are as follows: Unlike the prior art, this utility model embodiment provides a circuit board assembly, including a circuit board body, a busbar, and a screw connector; the circuit board body includes a body portion and a fracture portion, the body portion being connected to the fracture portion, and a fracture guiding structure being formed between the body portion and the fracture portion, the fracture guiding structure being used to guide the fracture portion to separate from the body portion; the busbar is connected to the body portion, and the busbar is provided with a screw hole, which is located above the fracture portion along the height direction of the busbar, and the screw hole is aligned with the center of the fracture portion; one end of the screw connector is screwed into the screw hole, and one end of the screw connector can... Moving along the depth direction of the screw hole, the other end of the screw connector is located on the side of the busbar away from the circuit board body. The screw connector is used to lock the wire terminal to the busbar. When the screw connector is in a preset first position relative to the busbar, one end of the screw connector passes through the wire terminal and is screwed into the screw hole, and the other end of the screw connector is located on the side of the busbar away from the circuit board body. When the screw connector moves to a preset second position relative to the busbar, the broken part breaks and separates from the body part and forms an opening. One end of the screw connector passes through the opening, and the other end of the screw connector presses the wire terminal to the surface of the busbar away from the circuit board body.

[0016] By employing the above method, since the screw connector does not contact or apply pressure to the fracture guide structure before wave soldering the busbar and the circuit board body, the probability of solder penetrating into the fracture guide structure and blocking the screw connector after solidification can be reduced during wave soldering. When the screw connector contacts and presses against the fractured part, the fractured part can be more reliably separated from the body part under the guidance of the fracture guide structure, allowing the screw connector to smoothly pass through the opening formed by the separation of the fractured part and the body part. The wire terminals are pressed and secured to the surface of the busbar away from the circuit board body by the screw connector, reducing the probability of loose screws. In addition, the fracture guide structure can prevent solder from flowing through the opening during wave soldering, thereby preventing solder from flowing to other adjacent pins and thus avoiding short circuits. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this utility model or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0018] Figure 1 This is a schematic diagram of the overall structure of the circuit board assembly provided in this embodiment of the utility model;

[0019] Figure 2 This is a partial structural schematic diagram of the circuit board assembly provided in an embodiment of the present utility model;

[0020] Figure 3 This is a partial exploded view of the circuit board assembly provided in this embodiment of the utility model;

[0021] Figure 4 This is a partial structural cross-section of the circuit board assembly provided in this embodiment of the utility model. Figure 1 ;

[0022] Figure 5 This is a partial structural cross-section of the circuit board assembly provided in this embodiment of the utility model. Figure 2 ;

[0023] Figure 6 This is a partial structural cross-section of the circuit board assembly provided in this embodiment of the utility model. Figure 3 .

[0024] Explanation of reference numerals in the attached figures:

[0025] 1 Circuit board body, 11 Body part, 12 Fracture part, 13 Fracture guide structure, 14 Through hole, 15 Connecting part, 16 Positioning hole, 17 Soldering hole;

[0026] 2. Manifold; 21. Screw hole; 22. U-groove; 23. Positioning part;

[0027] 3. Screw connectors;

[0028] 100 circuit board assembly. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0031] Currently, screw terminals are widely used in power switches due to their simple structure and low cost. Especially in applications with high current carrying capacity, screw-connected terminals can meet the transmission requirements of high current by increasing the contact area and mechanical pressure.

[0032] When connecting screw terminals to wire O-type terminals, tightening the screw is an essential step. When the screw length is mismatched (e.g., the screw is too long), the tail of the screw contacts the circuit board prematurely during tightening. The circuit board obstructs the screw tail, preventing further tightening. This results in the screw head not properly pressing the wire O-type terminal against the busbar, causing a "half-tight" screw. A half-tight screw increases contact resistance, potentially leading to unstable power output, localized overheating, or even power supply melting and burnout. Currently, to avoid this "half-tight" screwing, a hole is typically drilled in the circuit board corresponding to the screw tail to prevent obstruction and ensure the screw head properly presses the wire O-type terminal against the busbar. However, before connecting the screw terminals to the wire O-type terminals, the screw terminals need to be wave soldered to the circuit board. Wave solder can easily seep into the openings and solidify upon cooling, causing the openings to become clogged. When the screw terminals are subsequently connected to the wire O-type terminals, the clogged openings can obstruct the tail of the screw, increasing the probability of the screw being loosely tightened. At the same time, since the path of the solder flowing through the openings is difficult to predict, the solder may flow to other adjacent pins, causing short circuits and other problems.

[0033] In view of this, the present invention provides an embodiment of a circuit board assembly 100, which can reduce the probability of loose screws 3.

[0034] To facilitate the reader's understanding of the concept of this utility model embodiment, the specific structure of the circuit board assembly 100 is described below:

[0035] Please see Figures 1 to 3The circuit board assembly 100 includes a circuit board body 1, a busbar 2, and a screw connector 3. The circuit board body 1 includes a body portion 11 and a fracture portion 12. The body portion 11 is connected to the fracture portion 12, and a fracture guiding structure 13 is formed between the body portion 11 and the fracture portion 12 to guide the fracture portion 12 to separate from the body portion 11. The busbar 2 is connected to the body portion 11 and is provided with a screw hole 21. Along the height direction of the busbar 2, the screw hole 21 is located above the fracture portion 12 and is aligned with the center of the fracture portion 12. One end of the screw connector 3 is screwed into the screw hole 21, and one end of the screw connector 3 can move along the depth direction of the screw hole 21. The other end of the screw connector 3 is located on the busbar 2 away from the circuit board body. On one side of body 1, screw connector 3 is used to lock the wire terminal to busbar 2; wherein, when screw connector 3 is in a preset first position relative to busbar 2, one end of screw connector 3 passes through the wire terminal and is screwed into screw hole 21, and the other end of screw connector 3 is located on the side of busbar 2 away from circuit board body 1; when screw connector 3 moves to a preset second position relative to busbar 2, fracture part 12 breaks off from body part 11 and forms an opening, one end of screw connector 3 passes through the opening, and the other end of screw connector 3 presses the wire terminal to the surface of busbar 2 away from circuit board body 1; at the same time, the separation of fracture part 12 will remind the staff that the size of screw connector 3 does not meet the production requirements, and a suitable screw connector 3 can be replaced in time.

[0036] In this embodiment of the invention, since the screw connector 3 does not contact and apply pressure to the fracture guide structure 13 before wave soldering the busbar 2 and the circuit board body 1, the probability of solder penetrating into the fracture guide structure 13 and blocking the screw connector 3 after solidification during wave soldering is reduced. Simultaneously, the risk of solder flowing to other components or pins on the circuit board surface and causing short circuits is reduced. When the screw connector 3 contacts and presses the fracture portion 12, the fracture portion 12 can be more reliably separated from the body portion 11 under the guidance of the fracture guide structure 13, allowing the screw connector 3 to smoothly pass through the opening formed by the separation of the fracture portion 12 and the body portion 11. The wire terminals are pressed and secured to the surface of the busbar 2 away from the circuit board body 1 by the screw connector 3, reducing the probability of loose screw connector 3. At the same time, the separation of the fracture portion 12 will remind the operator that the size of the screw connector 3 does not meet production requirements, allowing for timely replacement with a suitable screw connector 3.

[0037] Regarding the circuit board body 1 described above, in some embodiments, please refer to... Figures 3 to 5The circuit board body 1 has a plurality of through holes 14 and a plurality of connecting portions 15 between the body portion 11 and the fracture portion 12. The plurality of through holes 14 are evenly spaced in a ring, and a connecting portion 15 is provided between any two through holes 14. The plurality of through holes 14 and the plurality of connecting portions 15 constitute a fracture guiding structure 13. In this way, when the screw connector 3 contacts and presses the fracture portion 12, the plurality of connecting portions 15 can fracture along a predetermined path in the ring direction under the guidance of the plurality of through holes 14, thereby improving the fracture uniformity of the fracture guiding structure 13 and reducing the probability of the fracture guiding structure 13 damaging the body portion 11 during the fracture process.

[0038] Furthermore, in some embodiments, please refer to Figures 3 to 5 Along the thickness direction of the circuit board body 1, the cross-sectional shapes of the through holes 14 are all the same, and the cross-sectional areas of the through holes 14 are all equal. Similarly, the cross-sectional shapes of the connecting portions 15 are all the same, and the cross-sectional areas of the connecting portions 15 are all equal. This method ensures that the connecting portions 15 experience uniform stress upon fracture, improving the uniformity and controllability of the fracture guiding structure 13 along the predetermined path, and further reducing the probability of the fracture guiding structure 13 damaging the body portion 11 during the fracture process.

[0039] Furthermore, in some embodiments, please refer to Figures 3 to 5 The extension length of the connecting portion 15 along the annular direction is less than the extension length of the through hole 14 along the annular direction. In this way, when the fractured structure is subjected to force, the fracture stress can be concentrated on the connecting portion 15, which has a weaker structural strength, so that the connecting portion 15 is more likely to fracture before other structures when subjected to force, thereby improving the accuracy of the fracture guiding structure 13 in fracturing along a preset path during the fracture process and improving the fracture controllability of the fracture guiding structure 13.

[0040] Furthermore, in some embodiments, 3 to Figure 5 The thickness of the connecting portion 15 is less than the thickness of the main body portion 11 or the thickness of the fracture portion 12. In this way, when the fracture structure is subjected to force, the fracture stress can be concentrated in the thinner connecting portion 15, so that it is easier to fracture before other structures when subjected to force, further improving the accuracy of the fracture guiding structure 13 in fracturing along a preset path during the fracture process, and further improving the fracture controllability of the fracture guiding structure 13.

[0041] For the above-mentioned bus 2, please refer to some embodiments. Figures 4 to 6The busbar 2 is U-shaped and has a U-shaped groove 22. A screw hole 21 connects to the bottom of the U-shaped groove 22, and the circuit board body 1 closes the opening of the U-shaped groove 22. When the screw connector 3 is in a preset first position relative to the busbar 2, one end of the screw connector 3 passes through the wire terminal and extends from the screw hole 21 into the U-shaped groove 22, while the other end of the screw connector 3 is located on the side of the busbar 2 away from the circuit board body 1. When the screw connector 3 moves to a preset second position relative to the busbar 2, one end of the screw connector 3 passes through the opening of the U-shaped groove 22 into the opening, while the other end of the screw connector 3 presses the wire terminal onto the surface of the busbar 2 away from the circuit board body 1. In this way, after the U-shaped busbar 2 is fixed to the circuit board body 1, the overall structural stability of the busbar 2 and the circuit board body 1 can be improved.

[0042] Furthermore, in some embodiments, please refer to Figures 4 to 6 The busbar 2 has a positioning part 23 around the opening of the U-shaped groove 22, and the circuit board body 1 has a positioning hole 16 in the body part 11. The positioning part 23 is inserted into the positioning hole 16. In this way, the probability of the busbar 2 shifting relative to the circuit board body 1 can be reduced during the installation of the busbar 2 on the circuit board body 1, and the accuracy of the alignment between the screw hole 21 and the center of the fracture part 12 can be improved.

[0043] Furthermore, in one embodiment, there are multiple positioning parts 23 and multiple positioning holes 16. Multiple positioning parts 23 are arranged in an array at the opening of the U-shaped groove 22 of the busbar 2, and multiple positioning holes 16 are arranged in an array on the body portion 11 of the circuit board body 1. The multiple positioning parts 23 and multiple positioning holes 16 are inserted into each other in a one-to-one correspondence. Through this method, the probability of the busbar 2 shifting relative to the circuit board body 1 can be further reduced during the installation of the busbar 2 onto the circuit board body 1, and the accuracy of the alignment between the screw hole 21 and the center of the fracture portion 12 can be further improved.

[0044] Please see Figures 4 to 6 The circuit board assembly 100 also includes a solder joint (not shown), which is disposed on the body portion 11. The solder joint is at least partially located between the positioning portion 23 and the positioning hole 16, and it fixes the positioning portion 23 to the positioning hole 16. Specifically, the solder joint covers the surface of the body portion 11 facing away from the busbar 2, and is at least partially embedded between the positioning portion 23 and the positioning hole 16. This method not only enables electrical connection between the busbar 2 and the circuit board body 1, but also improves the connection strength between the positioning portion 23 and the positioning hole 16.

[0045] In some embodiments, please refer to Figures 4 to 6The circuit board body 1 has soldering holes 17 on its body portion 11. The soldering holes 17 are spaced apart from the positioning holes 16, and the soldering component is at least partially located within the soldering holes 17. In this way, the soldering holes 17 can guide the flow of undried solder during the soldering process, providing an additional flow path and filling space for the undried solder, expanding the coverage area of ​​the soldered component, reducing the probability of cold solder joints due to insufficient coverage area or voids, and improving soldering reliability.

[0046] Furthermore, in some embodiments, please refer to Figures 4 to 6 The welding flux holes 17 are multiple, and are evenly spaced along the periphery of the positioning holes 16. The weldment is at least partially located within the welding flux holes 17. This method further expands the coverage area of ​​the welded part, further reduces the probability of incomplete welds due to insufficient coverage or voids in the weld joint, and further improves welding reliability.

[0047] This utility model provides a circuit board assembly 100, including a circuit board body 1, a busbar 2, and a screw connector 3. The circuit board body 1 includes a body portion 11 and a fracture portion 12, the body portion 11 and the fracture portion 12 are connected, and a fracture guiding structure 13 is formed between the body portion 11 and the fracture portion 12 to guide the fracture portion 12 to break apart from the body portion 11. The busbar 2 is connected to the body portion 11 and is provided with a screw hole 21. Along the height direction of the busbar 2, the screw hole 21 is located above the fracture portion 12 and is aligned with the center of the fracture portion 12. One end of the screw connector 3 is screwed into the screw hole 21, and one end of the screw connector 3 can be screwed along the screw hole 21. The screw connector 3 moves in the depth direction of the hole 21, with the other end located on the side of the busbar 2 away from the circuit board body 1. The screw connector 3 is used to lock the wire terminal to the busbar 2. When the screw connector 3 is in a preset first position relative to the busbar 2, one end of the screw connector 3 passes through the wire terminal and is screwed into the screw hole 21, while the other end of the screw connector 3 is located on the side of the busbar 2 away from the circuit board body 1. When the screw connector 3 moves to a preset second position relative to the busbar 2, the fracture portion 12 breaks off from the body portion 11 and forms an opening. One end of the screw connector 3 passes through the opening, and the other end of the screw connector 3 presses the wire terminal onto the surface of the busbar 2 away from the circuit board body 1. In this embodiment of the present invention, since the screw connector 3 does not contact and apply pressure to the fracture guide structure 13 before the busbar 2 and the circuit board body 1 are wave soldered, the probability of solder penetrating into the fracture guide structure 13 and blocking the screw connector 3 after solidification during the wave soldering process can be reduced. When the screw connector 3 contacts and presses the fractured part 12, it can more reliably separate the fractured part 12 from the main body 11 under the guidance of the fracture guide structure 13, so that the screw connector 3 can smoothly pass through the opening formed by the separation of the fractured part 12 and the main body 11. The wire terminal is pressed and fixed to the surface of the busbar 2 away from the circuit board body 1 by the screw connector 3, reducing the probability of loose screw connector 3. At the same time, the separation of the fractured part 12 will remind the staff that the size of the screw connector 3 does not meet the production requirements, and the appropriate screw connector 3 can be replaced in time.

[0048] This utility model also provides an embodiment of an electronic device, including the circuit board assembly 100 described above. For the specific structure and function of the circuit board assembly 100, please refer to the above embodiments, which will not be repeated here.

[0049] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A circuit board assembly, characterized in that, include: The circuit board body includes a body portion and a fracture portion, the body portion and the fracture portion are connected, and a fracture guiding structure is formed between the body portion and the fracture portion, the fracture guiding structure being used to guide the fracture portion to break apart from the body portion; A manifold is connected to the main body. The manifold is provided with a screw hole. Along the height direction of the manifold, the screw hole is located above the fracture portion and is aligned with the center of the fracture portion. A screw connector, one end of which is screwed into the screw hole, and the other end of which can move along the depth direction of the screw hole. The other end of which is located on the side of the busbar away from the circuit board body. The screw connector is used to lock the wire terminals to the busbar. When the screw connector is in a preset first position relative to the busbar, one end of the screw connector passes through the wire terminal and is screwed into the screw hole, and the other end of the screw connector is located on the side of the busbar away from the circuit board body. When the screw connector moves to a preset second position relative to the busbar, the fractured part breaks off from the body and forms an opening. One end of the screw connector passes through the opening, and the other end of the screw connector presses the wire terminal onto the surface of the busbar away from the circuit board body.

2. The circuit board assembly according to claim 1, characterized in that, The circuit board body has a plurality of through holes and a plurality of connecting parts between the body part and the fracture part. The plurality of through holes are evenly spaced in a ring, and a connecting part is provided between any two of the through holes. The plurality of through holes and the plurality of connecting parts constitute the fracture guiding structure.

3. The circuit board assembly according to claim 2, characterized in that, The extension length of the connecting portion along the circumferential direction is less than the extension length of the through hole along the circumferential direction.

4. The circuit board assembly according to claim 2, characterized in that, The thickness of the connecting part is less than the thickness of the body part or the thickness of the fracture part.

5. The circuit board assembly according to claim 1, characterized in that, The busbar is provided with a U-shaped groove, the screw hole is connected to the bottom of the U-shaped groove, and the circuit board body closes the opening of the U-shaped groove; When the screw connector is in a preset first position relative to the busbar, one end of the screw connector passes through the wire terminal and extends from the screw hole into the U-shaped groove, while the other end of the screw connector is located on the side of the busbar away from the circuit board body. When the screw connector moves to a preset second position relative to the busbar, one end of the screw connector passes through the opening of the U-shaped groove to the opening, and the other end of the screw connector presses the wire terminal onto the surface of the busbar away from the circuit board body.

6. The circuit board assembly according to claim 5, characterized in that, The busbar has a positioning part around the opening of the U-shaped groove, and the circuit board body has a positioning hole in the body part, and the positioning part is inserted into the positioning hole.

7. The circuit board assembly according to claim 6, characterized in that, The circuit board assembly further includes a soldering component disposed on the body portion. The soldering component is at least partially located between the positioning portion and the positioning hole, and the soldering component fixes the positioning portion to the positioning hole.

8. The circuit board assembly according to claim 7, characterized in that, The circuit board body has soldering holes in the body portion, and the soldering component is at least partially located in the soldering holes.

9. The circuit board assembly according to claim 8, characterized in that, The number of welding flux holes is multiple, and the multiple welding flux holes are evenly spaced along the periphery of the positioning hole, and the welded part is at least partially located in the multiple welding flux holes.

10. An electronic device, characterized in that, Includes the circuit board assembly as described in any one of claims 1-9.

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